Consulta: subjectFacets:"Shrimp"
Registros recuperados: 82
Data/hora: 06/06/2024 17:11:18

Decline of genetic variability in a captive population of Pacific white shrimp Penaeus (Litopenaeus) vannamei using microsatellite and pedigree information
Provedor de dados: 69
Autores: Vela Avitúa,Sergio; Montaldo,Hugo H; Márquez Valdelamar,Laura; Campos Montes,Gabriel R; Castillo Juárez,Héctor.
Background: The objective of this study was to estimate the decline of genetic variability and the changes in effective population size in three shrimp populations. One was a wild population collected at several points in the Mexican Pacific Ocean. The other two populations were different generations (7 and 9) from a captive population selected for growth and survival. Microsatellite markers and pedigree were both used to assess genetic variability and effective population size. Results: Using 26 loci, both captive populations showed a decline in the expected heterozygosity (20%) and allelic diversity indices (48 to 91%) compared to the wild population (P &lt; 0.05). The studied captive populations did not differ significantly from each other regarding...
Tipo: Journal article
Palavras-chave: Effective population size; Genetic diversity; Heterozygosity; Microsatellites; Selection; Shrimp.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000400009

Fluorescent amplified fragment length polymorphism (fAFLP) analyses and genetic diversity in Litopenaeus vannamei (Penaeidae)
Provedor de dados: 74
Autores: Gonçalves,Michelle Mantovani; Lemos,Manoel Victor Franco; Galetti Junior,Pedro Manoel; Freitas,Patrícia Domingues de; Furtado Neto,Manuel Antonio Andrade.
The Pacific white shrimp, Litopenaeus vannamei (Penaeidae), represents about 95% of all Brazilian shrimp production. The Brazilian L. vannamei foundation broodstock was made up of specimens collected from different American Pacific sites, but little information was collected on the genetic structure of the broodstock. We used the fluorescence amplified fragment length polymorphism (fAFLP) method to study the genetic diversity of L. vannamei broodstock lines 03CMF1 and 03CBF1 originally produced by breeder-shrimps imported mainly from Panama and Ecuador, although wild individuals from other localities may also have been used in producing these two lines. Our results showed a total of 93 polymorphic bands ranging from 50 to 500 bp, the mean Nei's genetic...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: FAFLP; Genetic diversity; Litopenaeus vannamei; Penaeidae; Shrimp.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000200016

Genetic distance between broodstocks of the marine shrimp Litopenaeus vannamei (Decapoda, Penaeidae) by mtDNA analyses
Provedor de dados: 74
Autores: Francisco,Ana Karina de; Galetti Junior,Pedro Manoel.
In the constantly growing Brazilian shrimp industry the evaluation of genetic relationships between broodstocks is an useful tool for shrimp culture management programs. We established the genetic relationships between five broodstocks of the white marine shrimp Litopenaeus vannamei (Penaeidae) based on the sequencing of the mtDNA 16S rRNA and cytochrome oxidase I (COI) regions. Although no divergence was found between the broodstocks for the highly conservative 16S rRNA gene, we did find an 8.2% distance between L. vannamei and the Farfantepenaeus subtilis. Analyses of the COI region showed genetic distances of only 0.2 to 1% between the broodstocks, which contrasted with the 10.9% mean distance found between L. vannamei and F. subtilis. The small genetic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Shrimp; Litopenaeus vannamei; Genetic variation; MtDNA.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572005000200014

PCR-based VNTR core sequence analysis for inferring genetic diversity in the shrimp Litopenaeus vannamei
Provedor de dados: 74
Autores: Freitas,Patrícia Domingues de; Galetti Junior,Pedro Manoel.
The genetic variation in two farmed strains (F3-Panama and F17-Venezuela) of the shrimp Litopenaeus vannamei was examined based on DNA multiloci analyses. Eighteen adults of each strain were analyzed by PCR using a set of VNTR core sequence primers. Genetic similarity, mean allele frequency, mean heterozygosity and the frequency of polymorphic loci were determined for both strains. A dendrogram of genetic similarity was produced by UPGMA clustering. The results for three primers (INS, M13, YN73) revealed different levels of genetic variation within the strains. The higher genetic similarity seen within strain F17 was apparently related to inbreeding, although a bottleneck effect could not be discarded. The low level of genetic variability of this strain...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Litopenaeus vannamei; Genetic diversity; Shrimp; VNTR; PCR.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000400012

Estágios de desenvolvimento gonadal de fêmeas do camarão-barba-ruça (Artemesia longinaris - Decapoda: Penaeidae)
Provedor de dados: 76
Autores: Dumont,Luiz Felipe Cestari; D'Incao,Fernando.
The stages of gonadal development for the female of "barba-ruça" shrimp (Artemesia longinaris Bate, 1888) were characterized based on histological analysis. Four stages (immature, almost mature, ripe and spawned) were determined according to the structure and arrangement of cells in the ovary. Each stage corresponds macroscopically to a characteristic color, except stages I (immature) and IV (spawned), in which colors are very similar and can be distinguished only microscopically. The chromatic scale varies from white/translucent (stage I), neutral green (almost mature) to dark green (ripe). The mean size of cells was 56.9 µm (±3.5) (stage I), 127 µm (±2.6) (stage II) and 183 µm (±1.91) (stage III). The size frequency of cells was polimodal, and different...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Artemesia; Shrimp; Reproduction; Gonadal histology.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212004000400006

Manejo de compostos nitrogenados na carcinicultura.
Provedor de dados: 14
Autores: PEREIRA, A. M. L.; SILVA, A. E. M. da; OLIVEIRA, C. R. do R.; SILVA, D. A. da; OLIVEIRA, D. W. S; SANTOS, E. P. dos; GONÇALVES JUNIOR, G. F.; KATO, H. C. de A.; ABREU, J. L. de; SILVA, L. O. B. da; PIMENTEL, O. A. L. F.; LIMA, P. C. M. de; OLIVEIRA, V. Q. de; GÁLVEZ, A. O.
Introdução. Ciclo do nitrogênio na carcinicultura. Microrganismos responsáveis pela oxidação e transformação dos compostos nitrogenados. Estratégias de fertilização com carbono orgânico para o controle dos compostos nitrogenados no cultivo de camarão marinho. Estratégias de utilização do carbono inorgânico para auxiliar o controle dos compostos nitrogenados no cultivo de camarão marinho. Qualidade de água e sua importância para ajudar no controle dos compostos nitrogenados. Fertilização mineral em sistemas de baixa salinidade e sua influência sobre os compostos nitrogenados. Considerações finais. Referências.
Tipo: Livros
Palavras-chave: Camarão marinho; BRS Aqua; Aquicultura; Cadeia Produtiva; Ciclo do Nitrogênio; Viveiro; Carcinicultura; Qualidade da Água; Aquaculture; Nitrogen cycle; Food chain; Nursery management; Shrimp; Nitrogen compounds; Litopenaeus vannamei; Water quality.
Ano: 2022
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1144229

Mangrove increases resiliency of the French Guiana shrimp fishery facing global warming
Provedor de dados: 5
Autores: Diop, Bassirou; Blanchard, Fabian; Sanz, Nicolas.
This paper deals with the biological, ecological and economic impact of global warming and mangrove habitat availability on the French Guiana shrimp fishery. A dynamic bio-economic model is built by employing a shrimp stock's growth function depending on Sea Surface Temperature (SST) and on mangrove surface. The model is empirically calibrated for the French Guiana shrimp fishery using time series collected over 1995–2011. First, two Cobb-Douglas functions, which describe shrimp's natural growth and harvest, are estimated. Then, a Maximum Economic Yield (MEY) harvest rule, based on the optimization of the net present value derived from fishing, is computed. Three management strategies are compared (Closure, Status Quo management, and MEY) under three...
Tipo: Text
Palavras-chave: Renewable resources; Fishery bio-economic model; Global warming; Shrimp; Sea surface temperature; Mangrove.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00455/56672/58537.pdf

Non-specific activation of antiviral immunity and induction of RNA interference may engage the same pathway in the Pacific white leg shrimp Litopenaeus vannamei
Provedor de dados: 5
Autores: Labreuche, Yannick; Veloso, Artur; De La Vega, Enrique; Gross, Paul S.; Chapman, Robert W.; Browdy, Craig L.; Warr, Gregory W.
Many questions remain unanswered regarding RNAi-based mechanisms and dsRNA-induced antiviral immune responses in penaeid shrimp. In this study, we report the characterization in the white leg shrimp Litopenaeus vannamei of RNAi pathway associated proteins Lv-Ago 1 and Lv-Ago 2, two members of the Argonaute family of proteins, as well as Lv-sid 1, the first shrimp homologue of Sid-1, a membrane channel-forming protein implicated in the cellular import of dsRNA. To decipher their functional implication in RNAi-related phenomena, we monitored their relative expression following stimulation by specific and non-specific RNA duplexes of diverse length. The findings show that the length of small RNA duplexes plays a critical role in the activation of both...
Tipo: Text
Palavras-chave: Shrimp; Litopenaeus vannamei; RNAi; DsRNA; Argonaute; Sid-1; Antiviral immunity.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00015/12652/9587.pdf

"Summer Syndrome" in Litopenaeus stylirostris in New Caledonia: Pathology and epidemiology of the etiological agent, Vibrio nigripulchritudo
Provedor de dados: 5
Autores: Goarant, Cyrille; Ansquer, Dominique; Herlin, Jose; Domalain, David; Imbert, Frederic; De Decker, Sophie.
The Summer Syndrome is a new shrimp disease that has been affecting a shrimp growout farm in New Caledonia since end of 1997. It was recognized to be caused by a systemic vibriosis due to Vibrio nigripulchritudo. This new disease turned out almost immediately enzootic in the shrimp farm involved and has affected all its crops ever since. Since the year 2000, V. nigripulchritudo strains have been found in several shrimp farms, although Summer Syndrome is still limited to one particular area, affecting, since 2003, two adjoining farms. As part of a multidisciplinary research program, a high-frequency survey was carried out during the summer 2002-2003 in two shrimp farms: one affected farm and another one in which pathogenic strains could be isolated but...
Tipo: Text
Palavras-chave: Epidemiology; Vibrio; Diseases and their control; Shrimp.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1110.pdf

Purification and characterization of infectious myonecrosis virus of penaeid shrimp
Provedor de dados: 5
Autores: Poulos, Bonnie; Tang, K; Pantoja, C; Bonami, Jean-robert; Lightner, D.
The causative agent of myonecrosis affecting cultured Penaeus vannamei in Brazil was demonstrated to be a virus after purification of the agent from infected shrimp tissues. Purified viral particles were injected into specific pathogen-free P. vannamei, resulting in a disease that displayed the same characteristics as those found in the original shrimp used for purification. The virus was named infectious myonecrosis virus (IMNV). The viral particles were icosahedral in shape and 40 nm in diameter, with a buoyant density of 1(.)366 g ml(-1) in caesium chloride. The genome consisted of a single, double-stranded (dsRNA) molecule of 7560 bp. Sequencing of the viral genome revealed two non-overlapping open reading frames (ORFs). The 5' ORF (ORF 1, nt 136-4953)...
Tipo: Text
Palavras-chave: Purification; Myonecrosis; Virus; Shrimp; Penaeid.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1504.pdf

Identification de marqueurs génétiques de la virulence chez Vibrio nigripulchritudo, un pathogène de crevettes pénéides en Nouvelle-Calédonie
Provedor de dados: 5
Autores: Reynaud, Yann.
Since 1997, a new pathology seasonally occurs in new caledonian shrimp farms during the warm season and was named Summer Syndrome. Diseased Litopenaeus stylirostris shrimp suffer from a septicemic vibriosis which was attributed to V. nigripulchritudo. Preliminary studies based on a collection of V. nigripulchritudo strains have brought to light different virulence levels according to experimental infections results; three virulence statuses were defined: highly (HP), moderately (MP) and non pathogenic (NP). The aim of this work was to genetically characterize virulent V. nigripulchritudo strains. In a first step the genetic diversity of 58 V. nigripulchritudo strains was analyzed by MLST and AP-PCR, revealing a cluster of HP and MP strains, characterized...
Tipo: Text
Palavras-chave: Plasmide; SSH; Épidémiology; Virulence; Shrimp; Vibriosis; Vibrio nigripulchritudo; Plasmide; SSH; Épidémiologie; Virulence; Crevette; Vibriose; Vibrio nigripulchritudo.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/these-3906.pdf

Digestive enzyme activity and food ingesta in juvenile shrimp Litopenaeus vannamei (Boone, 1931) as a function of body weight
Provedor de dados: 5
Autores: Gamboa Delgado, Julián; Molina Poveda, César; Cahu, Chantal.
A study was conducted to evaluate variations of digestive enzyme activities in Litopenaeus vannamei (Boone) reared in commercial ponds under semi-intensive conditions. Shrimp were collected at each body weight increase of 2 g. As the shrimp grew (2-12 g), significant increases in the activities of lipase and chymotrypsin were observed. The total protease activity decreased from 6 g onwards. Trypsin activity showed a peak at 6 g and amylase activity increased two-fold after 2 g. Additionally, the stomach contents were analysed microscopically for shrimp between 2 and 10 g. Plant matter contributed above 30% of the total stomach content in 6-, 8- and 10-g shrimp. Detritus represented 58% and 62% of the total stomach content in 2- and 4-g shrimp,...
Tipo: Text
Palavras-chave: Semi intensive culture; Stomach content; Digestive enzymes; Litopenaeus vannamei; Shrimp.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-902.pdf

Nutrient and microbial dynamics in eutrophying shrimp ponds affected or unaffected by vibriosis
Provedor de dados: 5
Autores: Lemonnier, Hugues; Courties, Claude; Mugnier, Chantal; Torreton, Jean-pascal; Herbland, Alain.
A field survey was conducted on two intensive shrimp farms using similar technical practices: one (DF) historically affected by a vibriosis, the other (HC) in which the pathogen has been observed although no mortality event has occurred. Because historical data suggest that eutrophication process may directly or indirectly play a role in the disease outbreak, we focussed our research on its dynamics. A higher variability of the phytoplanktonic compartment linked to an imbalance in the molar N:P ratio was observed in farm DF compared to farm HC, implying a modification on the linkage between the bacteria and phytoplankton compartments at DF. The beginning of the mortality outbreak at DF followed a shift from picoto nanophytoplankton. The organic matter...
Tipo: Text
Palavras-chave: Aquaculture; Shrimp; Eutrophication; Ecosystem shift; Phytoplankton; Vibriosis.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00002/11368/8119.pdf

Is It First the Egg or the Shrimp? – Diversity and Variation in Microbial Communities Colonizing Broods of the Vent Shrimp Rimicaris exoculata During Embryonic Development
Provedor de dados: 5
Autores: Methou, Pierre; Hernández-ávila, Ivan; Aube, Johanne; Cueff-gauchard, Valerie; Gayet, Nicolas; Amand, Louis; Shillito, Bruce; Pradillon, Florence; Cambon-bonavita, Marie-anne.
Rimicaris exoculata is one of the most well-known and emblematic species of endemic vent fauna. Like many other species from these ecosystems, Rimicaris shrimps host important communities of chemosynthetic bacteria living in symbiosis with their host inside the cephalothorax and gut. For many of these symbiotic partners, the mode of transmission remains to be elucidated and the starting point of the symbiotic relationship is not yet defined, but could begin with the egg. In this study, we explored the proliferation of microbial communities on R. exoculata broods through embryonic development using a combination of NGS sequencing and microscopy approaches. Variations in abundance and diversity of egg microbial communities were analyzed in broods at...
Tipo: Text
Palavras-chave: Hydrothermal; Shrimp; Microbial colonization; Alvinocarididae; Egg development.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00489/60067/63352.pdf

Grow-out of sandfish Holothuria scabra in ponds shows that co-culture with shrimp Litopenaeus stylirostris is not viable
Provedor de dados: 5
Autores: Bell, J; Agudo, N; Purcell, S; Blazer, P; Simutoga, M; Pham, Dominique; Della Patrona, Luc.
We examined the potential for producing the large numbers of sandfish (Holothuria scabra) needed for restocking programmes by co-culturing juveniles with the shrimp Litopenaeus stylirostris in earthen ponds. Our experiments in hapas within shrimp ponds were designed to detect any deleterious effects of sandfish on shrimp, and vice versa. These experiments showed that a high stocking density of juvenile sandfish had no significant effects on growth and survival of shrimp. However, survival and growth of sandfish reared with shrimp for 3 weeks were significantly lower than for sandfish reared alone. Increased stocking density of shrimp also had a significant negative effect on survival and/or growth of sandfish. A grow-out trial of juvenile sandfish in...
Tipo: Text
Palavras-chave: Shrimp; Sea cucumbers; Sandfish; Pond culture; Predation; Co culture.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3590.pdf

The role of microalgae in aquaculture: situation and trends
Provedor de dados: 5
Autores: Muller-feuga, Arnaud.
Algae are utilized diversely in aquaculture, but their main applications are related to nutrition. They are used in toto, as a sole component or as a food additive to supply basic nutrients, color the flesh of salmonids or for other biological activities. The need for nutritional sources safer than traditional animal products has renewed interest in plants in general and algae in particular. This report deals principally with the nutritional role of microalgae in aquaculture.The larvae of molluscs, echinoderms and crustaceans as well as the live prey of some fish larvae feed on microalgae. Though attempts have been made to substitute inert particles for these micro-organisms which are difficult to produce, concentrate and store, only shrimp and live prey...
Tipo: Text
Palavras-chave: Shrimp; Post larvae; Phytoplankton; Molluscs; Microalgae; Hatchery; Fish; Aquaculture.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-497.pdf

Influence de l'environnement trophique de l'élevage en biofloc sur les performances physiologiques de la crevette Litopenaeus stylirostris : Étude de paramètres de la nutrition, de l'immunité et de la reproduction
Provedor de dados: 5
Autores: Cardona, Emilie.
Biofloc is an intensive rearing system with zero or minimal water exchange where a diverse population of microorganisms (microalgae, zooplankton and bacteria) develops in association with organic matter to form the floc particles. These particles play the double role of biological filter and dietary supplement. This dissertation aims to better understand the process of this rearing system and its interactions with the Litopenaeus stylirostris shrimp. Two specific objectives were integrated within the framework of this general objective: (i) to measure the production gain from biofloc rearing and (ii) to study the interaction between biofloc environment and shrimp and to assess its role on production performances of shrimps. Thus, our results show...
Tipo: Text
Palavras-chave: Biofloc; Crevette; Nutrition; Stress oxydant; Défenses antioxydantes; Immunité; Reproduction; Oeufs; Larves; Bactéries; Microbiote; Biofloc; Shrimp; Nutrition; Oxidative stress; Antioxidant defences; Immunity; Reproduction; Eggs; Larvae; Bacteria; Microbiota.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00272/38294/36492.pdf

Arbitrarily primed PCR to type Vibrio spp. Pathogenic for shrimp
Provedor de dados: 5
Autores: Goarant, Cyrille; Merien, Fabrice; Berthe, Franck; Mermoud, Isabelle; Perolat, Philippe.
A molecular typing study on Vibrio strains implicated in shrimp disease outbreaks in New Caledonia and Japan was conducted by using AP-PCR (arbitrarily primed PCR). It allowed rapid identification of isolates at the genospecies level and studies of infraspecific population structures of epidemiological interest. Clusters identified within the species Vibrio penaeicida were related to their area of origin, allowing discrimination between Japanese and New Caledonian isolates, as well as between those from two different bays in New Caledonia separated by only 50 km. Other subclusters of New Caledonian V. penaeicida isolates could be identified, but it was not possible to link those differences to accurate epidemiological features. This contribution of AP-PCR...
Tipo: Text
Palavras-chave: Vibrio spp.; Shrimp; Molecular typing.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/publication-2734.pdf

Selection and characterization of potential probiotic bacteria for Litopenaeus stylirostris shrimp hatcheries in New Caledonia
Provedor de dados: 5
Autores: Pham, Dominique; Ansquer, Dominique; Chevalier, Anne; Dauga, Clement; Peyramale, Aude; Wabete, Nelly; Labreuche, Yannick.
In New Caledonia, shrimp hatcheries are confronted with mass mortality in the larval stages, a phenomenon poorly understood as no specific causative agent has been identified. This has resulted in an excessive use of prophylactic antibiotics, although their adverse effects in aquaculture are notorious. The present work was thus aimed at selecting potential probiotic strains for penaeid hatcheries.  From a pool of more than 400 marine bacterial isolates sampled from the local marine environment seven strains exhibited in vitro antagonistic activity towards Vibrio harveyi. These isolates were characterized both phenotypically and genotypically using a biochemical approach and 16S rDNA sequencing. Six out of these seven strains were found to belong to the...
Tipo: Text
Palavras-chave: Shrimp; Litopenaeus stylirostris; Probiotic; Hatchery; Pseudoalteromonas; Immune response.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00190/30129/28591.pdf

Bacterial community characterization of water and intestine of the shrimp Litopenaeus stylirostris in a biofloc system
Provedor de dados: 5
Autores: Cardona, Emilie; Gueguen, Yannick; Magré, Kevin; Lorgeoux, Bénédicte; Piquemal, David; Pierrat, Fabien; Noguier, Florian; Saulnier, Denis.
Background  Biofloc technology (BFT), a rearing method with little or no water exchange, is gaining popularity in aquaculture. In the water column, such systems develop conglomerates of microbes, algae and protozoa, together with detritus and dead organic particles. The intensive microbial community presents in these systems can be used as a pond water quality treatment system, and the microbial protein can serve as a feed additive. The current problem with BFT is the difficulty of controlling its bacterial community composition for both optimal water quality and optimal shrimp health. The main objective of the present study was to investigate microbial diversity of samples obtained from different culture environments (Biofloc technology and clear...
Tipo: Text
Palavras-chave: Shrimp; Biofloc; Clear sea water; Bacterial communities; Culture environment; Microbiota.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00346/45694/45314.pdf

Bioeconomic model of the dynamics of fisheries facing global economic and environment changes: the French Guyana shrimp fishery
Provedor de dados: 5
Autores: Chaboud, Christian; Thebaud, Olivier.
In the past two decades, the French Guyana shrimp fishery has known dramatic evolutions, largely driven by global changes. On the economic side, two major driving factors are the globalization of the shrimp market, with a decreasing trend in real prices, an d the long-term increase in fuel prices worldwide. On the environmental side, recruitment of the two main species of shrimp targeted in the fishery seems to have decreased over the last decade. This decrease is probably related to hydroclimatic modifications linked to global change. It is important to assess the adaptive capacity of the fishery facing such changes, as well as the relevance of past and future public policies to improve this capacity.  A key component of this adaptive capacity is the way...
Tipo: Text
Palavras-chave: Bioeconomic modeling; Fishery management; Subsidies; Shrimp; French Guyana.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00243/35473/33988.pdf

Pathogenicity of Vibrio penaeicida or white shrimp Litopenaeus vannamei: a cysteine protease-like exotoxin as a virulence factor
Provedor de dados: 5
Autores: Aguirre Guzman, G; Ascencio, F; Saulnier, Denis.
The pathogenicity of Vibrio penaeicida Strains KH-1 and AM101, their culture-free supernatant (CFS), and their protein fraction obtained by 40% of ammonium sulfate precipitation (PFs40) were assessed in experimental challenges against juvenile Litopenaeus vannamei. Live Vibrio cells, CFS, and PFs40 from the AM101 strain produced a significantly higher mortality (p &lt; 0.05) compared to the KH-1 strain. Toxicity and median lethal doses (LD50) of Fast Protein Liquid Chromatography (FPLC) products were evaluated on L. vannamei. The first FPLC fraction sample (A) from PFs40 of the AM101 strain displayed LD50 values of 1.68 and 5.61 mu g protein ind.(-1), respectively. The second FPLC process from Fraction A showed a peak (A1) also with toxic effects to...
Tipo: Text
Palavras-chave: Pathogenicity; Exotoxin; Shrimp; Litopenaeus vannamei; Cysteine protease; Vibrio penaeicida.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-3618.pdf

Energy balance of Litopenaeus vannamei postlarvae fed on animal or vegetable protein based compounded feeds
Provedor de dados: 5
Autores: Jimenez Yan, L; Brito, A; Cuzon, Gerard; Gaxiola, G; Garcia, T; Taboada, G; Soto, L; Brito, R.
L. vannamei postlarvae are normally raised with a protein dense diet (50% protein) rich in fishmeal. Part of the protein is utilized for energy purpose instead of protein synthesis. Based on a previous energy partitioning study, the effects of two isoenergetic compounded feed treatments - animal protein (AP) and vegetable protein and carbohydrates (VPC) - upon growth efficiency and energy budget of shrimp postlarvae and early juveniles were determined. Recovered energy (RE) or production (P) after 50 days trial was similar (2 J day(-1)) in both treatments, from PL14 to PL19. However, early juveniles discriminated between animal protein (116 J day(-1)) and vegetable protein and carbohydrates (88 J day(-1)). The difference in respiration indicated a higher...
Tipo: Text
Palavras-chave: Shrimp; Physiology; Vegetable protein; Animal protein; Energy; Juvenile; Postlarvae.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1879.pdf

Differentiation of BP-type baculovirus strains using in situ hybridization
Provedor de dados: 5
Autores: Durand, S; Lightner, Dv; Bonami, Jr.
BP-type viruses infect wild and farmed shrimp species in the Americas and can cause high mortality in larval stages. Histologically, BP disease is characterized by the presence of occlusion bodies (OBs) in the nucleus of hepatopancreatic epithelial cells. By in situ hybridization using different molecular probes, we tested shrimp infected with BP-type viruses collected from several geographical areas. In one shrimp, a case of double infection by 2 different BP-type viruses was noted. This has not been previously reported. The molecular probes recognized only the Pacific strain of BP. This specificity of the probe was confirmed by in situ hybridization tests with some infected shrimp collected from the Atlantic and Pacific coasts. The probes reacted only...
Tipo: Text
Palavras-chave: Baculovirus; BP; In situ hybridization; Nonradioactive probes; Shrimp.
Ano: 1998
URL: https://archimer.ifremer.fr/doc/00447/55821/62253.pdf

Residual genetic variability in domesticated populations of the Pacific blue shrimp (Litopenaeus stylirostris) of New Caledonia, French Polynesia and Hawaii and some management recommendations
Provedor de dados: 5
Autores: Goyard, Emmanuel; Arnaud, Sophie; Vonau, Vincent; Bishoff, Vincent; Mouchel, Olivier; Pham, Dominique; Wyban, Jim; Boudry, Pierre.
The Latin American shrimp Litopenaeus stylirostris was introduced in three different Pacific islands (Tahiti, New Caledonia via Tahiti, and Hawaii) and hatchery-propagated for 7-25 generations to develop shrimp farming based on these domesticated stocks. Three microsatellite markers have been used in an attempt to assess the genetic bases of the populations available to start a selective breeding program. The comparison of eight hatchery stocks (five New Caledonian, two Hawaiian and one Tahitian stocks) and one wild Ecuadorian population showed a much lower variability in the domesticated stocks than in the wild population, especially in New Caledonia and Tahiti (2-3.7 vs. 14-27 alleles per locus; 20-60% vs. 90% expected heterozygosity). The Tahitian and...
Tipo: Text
Palavras-chave: Microsatellite marker; Genetic variability; Domestication; Litopenaeus stylirostris; Shrimp.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-596.pdf

Sequence polymorphism-based identification and quantification of Vibrio nigripulchritudo at the species and subspecies level targeting an emerging pathogen for cultured shrimp in New Caledonia
Provedor de dados: 5
Autores: Goarant, Cyrille; Reynaud, Yann; Ansquer, Dominique; De Decker, Sophie; Merien, Fabrice.
In a previous study, we demonstrated the existence of an emerging cluster of Vibrio nigripulchritudo that proved to be associated with shrimp mortality events in New Caledonia. Using sequence polymorphisms evidenced in this previous MultiLocus Sequence Typing study, we developed two new quantitative PCR assays permitting the detection and quantification of V. nigripulchritudo at the genospecies level using SYBR Green I chemistry and at the emerging cluster level using Fluorescence Resonance Energy Transfer technology with hybridization probes.   The use of this molecular diagnostic tool evidenced the colonization of the shrimp pond ecosystem by the pathogenic cluster at least at the onset of the disease. This new tool will allow better investigation of the...
Tipo: Text
Palavras-chave: Shrimp; Cluster specific; Vibrio; Pathogen; Mariculture; Real time PCR.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2729.pdf

Traitement des crevettes contre le noircissement .Mise au point d'une ligne de traitement
Provedor de dados: 5
Autores: Chantreau, Patrick.
Once fished, the shrimps must be cooled quickly in water cooled in order to slow down all chemical and bacteriological activities. In addition, in order to avoid blackening (mélanose) shrimps (céphalothorax and legs) it is necessary to treat those with an antioxydant product. The product currently used to inhibit this enzymatic change is the soda niétabisuifite (Na-&gt; S7 O5), until now, after being fished. the shrimps were directly soaked in a cooled water tank, containing the pesticide.  The solution of treatment was progressively prepared needs. The concentration of this one was approximately 2 to 3% of métabisulfite, that is to say 6 to 9 G of SO2 per liter for a starting product containing 320 G of SO2 approximately.  In order to preserve a good...
Tipo: Text
Palavras-chave: New Caledonia; Blackening; Treatment; Penaeus stylirostris; Shrimp; Nouvelle Calédonie; Noircissement; Traitement; Penaeus stylirostris; Crevette.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/rapport-1648.pdf

L'élevage larvaire de crevettes en Nouvelle-Calédonie. L'Oxytétracycline et l'association Triméthoprime - Sulfadiazine en tant qu'alternatives à l'emploi de l'Erythromycine en écloserie
Provedor de dados: 5
Autores: Francois, Cyrille.
Aquaculture of penaeid shrimps holds a major place in productions of animals. New Caledonia takes part to these productions by developing the breeding of Pacific blue shrimp Litopenaeus stylirostris. Nowadays, penaeid larviculture can’t be undertaken unless antibiotics are used. Experiments in the Caledonian Aquacultural Laboratory (LAC IFREMER Saint-Vincent) put across to the development of two antibiotic prophylaxis plans for substitution of erythromycine, one plan with oxytetracycline (hydrochloride), the other plan with trimethoprime-sulfadiazine association. After an antimicrobial agent susceptibility testing of bacteria and an acute toxicity study, efficacity assays are the biological validation of these projects of protocols
Tipo: Text
Palavras-chave: Crevette; Ecloserie; Oxytétracycline; Triméthoprime; Sulfadiazine; Shrimp; Hatchery; Oxytetracycline; Trimetroprime; Sulfadiazine.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00072/18312/15877.pdf

Comparative genomics of pathogenic lineages of Vibrio nigripulchritudo identifies virulence-associated traits
Provedor de dados: 5
Autores: Goudenege, David; Labreuche, Yannick; Krin, Evelyne; Ansquer, Dominique; Mangenot, Sophie; Calteau, Alexandra; Medigue, Claudine; Mazel, Didier; Polz, Martin F.; Le Roux, Frederique.
Vibrio nigripulchritudo is an emerging pathogen of farmed shrimp in New Caledonia and other regions in the Indo-Pacific. The molecular determinants of V. nigripulchritudo pathogenicity are unknown; however, molecular epidemiological studies have suggested that pathogenicity is linked to particular lineages. Here, we performed high-throughput sequencing-based comparative genome analysis of 16 V. nigripulchritudo strains to explore the genomic diversity and evolutionary history of pathogen-containing lineages and to identify pathogen-specific genetic elements. Our phylogenetic analysis revealed three pathogen-containing V. nigripulchritudo clades, including two clades previously identified from New Caledonia and one novel clade comprising putatively...
Tipo: Text
Palavras-chave: Horizontal gene transfer; Nigritoxin; Phylogeny; Shrimp; Virulence; Vibrio.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00160/27117/28369.pdf

Stylicins, a new family of antimicrobial peptides from the Pacific blue shrimp Litopenaeus stylirostris
Provedor de dados: 5
Autores: Rolland, Jean-luc; Abdelouahab, Mahdia; Dupont, J.; Lefevre, F.; Bachere, Evelyne; Romestand, Bernard.
The present study reports the characterization of Ls-Stylicin1, a novel antimicrobial peptide from the penaeid shrimp, Litopenoeus stylirostris. The predicted mature peptide of 82 residues is negatively charged (theoretical pl=5.0) and characterized by a proline-rich N-terminal region and a C-terminal region containing 13 cysteine residues. The recombinant Ls-Stylicin1 has been isolated in both monomeric and dimeric forms. Both display strong antifungal activity against Fusarium oxysporum (1.25 mu M &lt; MIC &lt;2.5 mu M), a pathogenic fungus of shrimp, but lower antimicrobial activity against Gram () bacteria, Vibrio sp. (40 mu M &lt; MIC &lt;80 mu M). However, rLs-Stylicin1 is able to agglutinate Vibrio pennaeicidae in vitro in agreement with its potent...
Tipo: Text
Palavras-chave: Ls-Stylicin 1; Peptide; Shrimp; Antifungal; Agglutination; Vibrio.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00003/11387/8094.pdf

The effect of starvation on refeeding, digestive enzyme activity, oxygen consumption, and ammonia excretion in juvenile white shrimp Litopenaeus vannamei
Provedor de dados: 5
Autores: Comoglio, Li; Gaxiola, G; Roque, A; Cuzon, Gerard; Amin, O.
Juveniles of the white shrimp Litopenaeus vannamei were kept Without food for between 0 to 15 clays to evaluate the impact of starvation oil physiologic state (oxygen consumption, poststarvation refeeding, index, nitrogen excretion, and O:N ratio) and digestive enzymes activity. Physiologic changes were found after 6 days of fasting, and refeeding ability declined as a result. Nevertheless. the shrimp were able to Survive 16 days Without food. Starvation Caused metabolism to drop progressively toward a basal level (21 J (.) h(-1 .) g(-1)) and a decrease in the rate of ammonia excretion, because of the catabolism of amino acids front soluble protein in the hepatopancreas. This decrease led to an increase in digestive enzymes specific activity (U/mg...
Tipo: Text
Palavras-chave: Digestive enzymes; Litopenaeus vannamei; Metabolic rate; Shrimp; Starvation.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/00000/10877/7911.pdf

Peches experimentales des crustaces profonds dans les eaux de la martinique ( pandalidae, nephropidae ). Prospections, rendements et biologie des especes.
Provedor de dados: 5
Autores: Paulmier, Gerard; Gervain, Paul.
The principal objective of the work carried out in the deep waters adjoining the island shelf around Martinique between July 1991 and april 1992 was to establish an initial inventory of potentially exploitable deep benthic resources.The cylindrical lobster pot used during fishing experiments allowed the catch of a varied carcinological marine organisms of which six species at least have economic interest : 5 species of shrimp all belonging to the sub-order of Caridea of the Pandalidae family : Plesionika edwardsi, P. (macropoda) polyacanthomerus, P.laevis, Heterocarpus ensifer and H.laevigatus, and one species of prawn of the Nephropidae family : Eunephrops cadenasi. The yields, compared to those of commercial fishermen, were medium or good for Plesionika...
Tipo: Text
Palavras-chave: Depth; Biology; Fishinf; Prawn; Shrimp; Crustaceas; Martinique; Profond; Biologie; Pêche; Langoustine; Crevette; Crustace; Martinique.
Ano: 1994
URL: http://archimer.ifremer.fr/doc/1994/rapport-1540.pdf

Proteinaceous exotoxins of shrimp-pathogenic isolates of Vibrio penaeicida and Vibrio nigripulchritudo
Provedor de dados: 5
Autores: Aguirre-guzman, Gabriel; Labreuche, Yannick; Ansquer, Dominique; Espiau, Benoit; Levy, Peva; Ascencio, Felipe; Saulnier, Denis.
The pathogenicity of two V. penaeicida strains, AM101 and KH-1, with different geographic origin, and V. nigripulchritudo strain AM102, were investigated in juvenile blue shrimp species Litopenaeus stylirostris. Alive bacteria and protein fractions (PFs) obtained from cell-free supernatants (CFS) were used in experimental challenges. Strains AM102, AM101, and KH-1 produced respectively 60, 54 and 12% mortality at 96h after infection using 104 cfu mL-1 of bacterial suspension. Exocellular toxin-like factors were evidenced in CFS from the New Caledonian strains (AM102 and AM101) but not the Japanese strain (KH-1). At 48h post injection of each CFS, mortality rates were respectively 96,98 and 5% when these strains were cultivated at 20°C, whereas only O,16...
Tipo: Text
Palavras-chave: Pathogenicity; Exotoxin; Shrimp; Litopenaeus stylirostris; Vibrio nigripulchritudo; Vibrio penaeicida.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-2807.pdf

Effect of probiotic Pediococcus acidilactici on antioxidant defences and oxidative stress of Litopenaeus stylirostris under Vibrio nigripulchritudo challenge
Provedor de dados: 5
Autores: Castex, Mathieu; Lemaire, Pierrette; Wabete, Nelly; Chim, Liet.
Antioxidant defences and induced oxidative stress tissue damage of the blue shrimp Litopenaeus stylirostris, under challenge with Vibrio nigriputchritudo, were investigated for a 72-h period. For this purpose, L stylirostris were first infected by immersion with pathogenic V. nigripulchritudo strain SFn1 and then antioxidant defences: superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (Gpx), Total antioxidant status (TAS), glutathiones and induced tissue damage (MDA and carbonyl proteins) were determined in the digestive gland at 0, 12, 24, 48 and 72 h post-infection (h.p.i.). In the meantime, TAS was also measured in the blood. Infection level of the shrimps during the challenge was followed by determining V. nigripulchritudo prevalence...
Tipo: Text
Palavras-chave: Probiotic; Pediococcus acidilactici; Shrimp; Oxidative stress; Antioxidant status; Vibrio; Immersion challenge.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00003/11419/7984.pdf

Insights into the antiviral functions of the RNAi machinery in penaeid shrimp
Provedor de dados: 5
Autores: Labreuche, Yannick; Warr, Gregory W.
Over the last decade, RNA interference pathways have emerged in eukaryotes as critical regulators of many diverse biological functions including, among others, transcriptional gene regulation, post-transcriptional gene silencing, heterochromatin remodelling, suppression of transposon activity, and antiviral defences. Although this gene silencing process has been reported to be relatively well conserved in species of different phyla, there are important discrepancies between plants, invertebrates and mammals. In penaeid shrimp, the existence of an intact and functional RNAi machinery is supported by a rapidly growing body of evidence. However, the extent to which this process participates to the host immune responses remains poorly defined in this non-model...
Tipo: Text
Palavras-chave: Shrimp; Innate immune response; In vertebrate immunity; RNA interference; Virus.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00119/23063/20899.pdf

Comparative study of bactrial infections responsible for mass mortality in penaeid shrimp hatcheries of the Pacific zone
Provedor de dados: 5
Autores: Le Groumellec, M.; Haffner, Philippe; Martin, B.; Martin, C.
Mass mortality associated with luminescence has been dbserved in sorne Thai and Ecuadorian penaeid shrimp hatcheries in recent years. Samples collected from hatcheries in these two different areas revealed luminescent sucrose-negative Vibrio strains in larVal rearing tanks where mortality occurred. Pathogenicity trials were carried out to identify the causative agents of mortality and to study the course of infection . . Results showed that strains isolated from Thai hatclleries were more virulent than Ecuadorian strains when tested on different larval stages of Penaeus monodon. The virulence of these strains was also estimated. Trials on other species ofpenaeid shrimp demonstrated the specifie action of Thai strains. Drug sensitivity patterns revealed a...
Tipo: Text
Palavras-chave: Mass mortality; Bacterial; Vibrio; Hatcheries; Penaeus monodon; Shrimp.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/1993/acte-6100.PDF

Bacterial symbionts and mineral deposits in the branchial chamber of the hydrothermal vent shrimp Rimicaris exoculata: relationship to moult cycle
Provedor de dados: 5
Autores: Corbari, Laure; Zbinden, Magali; Cambon-bonavita, Marie-anne; Gaill, Françoise; Compere, Philippe.
The shrimp Rimicaris exoculata is considered a primary consumer that dominates the fauna of most Mid-Atlantic Ridge hydrothermal ecosystems. The shrimps harbour in their gill chamber an important ectosymbiotic community of chemoautotrophic bacteria associated with iron oxide deposits. The settlement and development of this ectosymbiosis was investigated using microscopy techniques (light microscopy, LM; and scanning, transmission and environmental scanning electron microscopy: SEM and ESEM, respectively) for shrimps from 2 different vent fields (Rainbow, 36 degrees 14.0' N and TAG, 26 degrees 08.0' N). The results revealed a bacterial re-colonisation after each exuviation and a development of the bacterial community in 5 steps in relation to the moult...
Tipo: Text
Palavras-chave: Iron oxides; Ectosymbiosis; Moult cycle; Shrimp; Hydrothermal vents.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4626.pdf

Effet des conditions environnementales sur le développement des pathologies à Vibrio dans les élevages de crevettes en Nouvelle-Calédonie
Provedor de dados: 5
Autores: Lemonnier, Hugues.
Shrimp aquaculture in New Caledonia is a developing industry, exclusively based on the species Litopenaeus stylirostris. However, it is subject to mortalities during grow out as observed all over the world. Since 1993, shrimp reared during the cold period are affected by a disease named "syndrome 93". As a consequence, the whole industry has become seasonal and produces essentially during the warm season. The climatic conditions during the periods of transition between the two main seasons could be responsible for an environmental stress and the origin reason for mortality outbreaks. Stocking density is the main risk factor. It increases the probability of the appearance and development of the epizooty in the pond. The "Summer Syndrome", a septicemic...
Tipo: Text
Palavras-chave: New Caledonia; Risk factors; Environmental stress; Vibriosis; Epizooty; Pond management; Eutrophication; Pond health; Shrimp; Litopenaeus stylirostris; Peneids; Aquaculture; Nouvelle  Calédonie; Facteur de risque; Stress environnemental; Vibrioses; Pratiques d'élevage; Eutrophisation; Santé de l'écosystème bassin; Crevette; Litopenaeus stylirostris; Pénéides; Aquacultre.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/these-2643.pdf

Traitement des langoustines et des crevettes contre le noircissement
Provedor de dados: 5
Autores: Chantreau, Patrick; Vallet, Jean-luc.
The conservation of crawfish requires the use of chemical substances making it possible to limit blackening.  This phenomenon this blackening (melanine) is due to the coordinated action of three elements: - oxygen,   - an enzyme (cupro-protein),  - a suitable substrate, tyrosin or the dihydroxyphénylalanine.  The absence of the one of them allows a notorious reduction in the phenomenon.  Several antioxydant products, were used to prevent the formation of the mélanine. The métabisutfite of soda or potassium as well as soda bisulfite in acid solution, are currently used to treat crawfish and shrimps.  Several methods of use of these pesticides exist, we propose in this report to present the principal ones, as well as the control methods making it possible to...
Tipo: Text
Palavras-chave: Regulation; Sprinkling; Antioxydant; Technology; Treatment; Shrimp; Crawfish; Réglementation; Aspersion; Antioxydant; Technologie; Traitement; Crevette; Langoustine.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/rapport-1586.pdf

Is it possible to raise, offspring of the 25th generation of Litopenaeus vannamei (Boone) and 18th generation Litopenaeus stylirostris (Stimpson) in clear water to 40 g?
Provedor de dados: 5
Autores: Cuzon, Gerard; Arena, Leticia; Goguenheim, Jean; Goyard, Emmanuel.
Peneid shrimp are commonly reared in clear-water aquaria or tanks for short-term studies of 4-6 weeks during controlled experiments, such as nutrition studies to estimate dietary nutrient requirements. Recently, in line with the genetic program at Centre Oceanologique du Pacifique (COP), experimental clear-water facilities were tested for the first time over a longer rearing period. Environmental conditions used to maintain animal growth in clear-water system using a well-balanced diet were defined. After 100 days, shrimp growth rates tended to decrease and only by adjusting the diet could shrimp complete their life cycle and reach maturation size of around 40 g. This paper presents information on stocking density, diet quality and husbandry linked to...
Tipo: Text
Palavras-chave: Formulated diets; Husbandry; Quarantine; Litopenaeus stylirostris; Shrimp; Nutrition; Zootechnie; Quarantaine; Litopenaeus stylirostris; Crevette.
Ano: 2004
URL: http://archimer.ifremer.fr/doc/2004/publication-619.pdf

Proteolysis of shrimp by-products (Peaneus monodon) from Madagascar
Provedor de dados: 5
Autores: Randriamahatody, Zo; Sylla, K. S. B.; Nguyen, Thi-my-huong; Donnay-moreno, Claire; Razanamparany, L.; Bourgougnon, N.; Berge, Jean-pascal.
To generate and recover elements from shrimp heads, proteolysis was performed with commercial acidic or alkaline proteases for 22 h. The resulting phases were characterized for protein and lipid content and amino acid composition while the molecular proﬁles of soluble peptides were established. Whatever the protease used, more than the half of the initial dry matter was found into aqueous phase including most of the proteins while lipids were found to remain insoluble. Hydrolysates were mainly constituted by small peptides (480% below 1000 Da) with up to 14–15 amino acids identiﬁed. Moreover, all the hydrolyses have led to an increase of the amount of essential amino acids into the hydrolysates, including lysine. Thus, such proteolysis of shrimp heads can...
Tipo: Text
Palavras-chave: By-products; Shrimp; Proteolysis; Hydrolysate.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00055/16646/14196.pdf

Lack of evidence for Litopenaeus vannamei Toll receptor (lToll) involvement in activation of sequence-independent antiviral immunity in shrimp
Provedor de dados: 5
Autores: Labreuche, Yannick; O'Leary, Nuala A.; De La Vega, Enrique; Veloso, Artur; Gross, Paul S.; Chapman, Robert W.; Browdy, Craig L.; Warr, Gregory W.
injection of non-specific dsRNA initiates a broad-spectrum innate antiviral immune response in the Pacific white shrimp, Litopenaeus vannamei, however, the receptor involved in recognition of this by-product of viral infections remains unknown. In vertebrates, dsRNA sensing is mediated by a class of Toll-like receptors (TLRs) and results in activation of the interferon system. Because a TLR (lToll) was recently characterized in L. vannamei, we investigated its potential role in dsRNA recognition. We showed that injection of non-specific RNA duplexes did not modify lToll gene expression. A reverse genetic approach was therefore implemented to study its role in vivo. Silencing of lToll did not impair the ability of nonspecific dsRNA to trigger protection...
Tipo: Text
Palavras-chave: Shrimp; Virus; RNA interference; Invertebrate immunity; Innate immune response; Toll like receptor; DSRNA.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6428.pdf

Effect of water exchange on effluent and sediment characteristics and on partial nitrogen budget in semi-intensive shrimp ponds in New Caledonia
Provedor de dados: 5
Autores: Lemonnier, Hugues; Faninoz, Sebastien.
An experiment was conducted in six earthen ponds with 20 shrimps m(-2) Litopenaeus stylirostris (Stimpson) during the warm season in New Caledonia to study the dynamics of wastes in relation with water exchange rate (WER). The nitrogen budget was established, taking into account the different forms of nitrogen in the water, sediment, feed and shrimp. Data from a wide range of treatments applied in unreplicated ponds were treated using regression analysis to establish the relationship between WER and partial nitrogen budget, sediment characteristics and shrimp performance. To compare effluent quality between treatments during the season, data were analysed using the non-parametric sign test. The water outflow was characterized by a decrease in the...
Tipo: Text
Palavras-chave: New Caledonia; Nitrogen; Water exchange; Shrimp; Sediment quality; Effluent.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1811.pdf

Combined effect of temperature and salinity on osmoregulation of juvenile and subadult Penaeus stylirostris
Provedor de dados: 5
Autores: Lemaire, Pierrette; Bernard, Eric; Martinez-paz, J; Chim, Liet.
In New Caledonia, the "syndrome 93," which results in mass mortalities of farmed shrimp Penaeus stylirostris, occurs during the transitional and the cold seasons. The transitional season is characterized by an important fall in the average water temperature from 28 to 19 degreesC in 2 weeks. Besides this marked temperature fall, there are also nyctemeral temperature changes of up to 7 degreesC in 12 h. The cold season is characterized by an average water temperature of 19 degreesC with extreme lows of 14 degreesC. The objective of this study was to determine the effect of temperature and its variations on the osmoregulatory capacity of juvenile (7-10 g average weight) and subadult (25 g average weight) shrimps subjected to conditions of different salinity....
Tipo: Text
Palavras-chave: Temperature; Salinity; Osmoregulatory capacity; Penaeus stylirostris; Shrimp.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/publication-395.pdf

Development of the shrimp industry in the Western Indian Ocean - a holistic approach of vertical integration, from domestication and biosecurity to product certification
Provedor de dados: 5
Autores: Le Groumellec, Marc; Rigolet, Vincent; Panchayuthapani, Duraisamy; Vandeputte, Marc; Rao, Vemulapalli Manavendra.
The shrimp farming industry in the western Indian Ocean started with Aqualma’s project in 1989, and now several companies farm shrimp in the Mozambique Channel. Despite the remoteness of these projects and their high investment and operating costs, they compete in the global marketplace by efficiently producing high value quality products. To address sustainability and biosecurity issues, Aqualma developed domesticated specific pathogenfree (SPF) broodstock of Penaeus monodon from western Indian Ocean stocks, which have been its exclusive source of post-larvae since 2003. Specific molecular diagnostic tools have been developed for each endemic pathogen detected since 1996, and these are used for routine surveillance of Aqualma’s shrimp stocks along with...
Tipo: Text
Palavras-chave: Shrimp; Madagascar; Domestication; Biosecurity; Certification.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00099/20980/18604.pdf

Effluents from land based marine farms: nature, treatment, valorisation, modelisation. Applications to fish and shrimp rearing
Provedor de dados: 5
Autores: Hussenot, Jerome; Lefebvre, Sebastien; Martin, Jean-louis.
Fish culture (seabass, turbot...) on the French metropolitan coast, and shrimp culture in the overseas territories (essentially New Caledonia and Tahiti) are subject to a regular development through land based farms. Three thematic of research on aquaculture ponds are carried out in CREMA-L’Houmeau, in collaboration with producers. The aim of the first one is to determine the optimal rearing conditions (stocking density, water renewal rate, input of oxygen, rate of feeding...) which allow to minimise the quantity of wastes for a similar final biomass. The second part aims to reduce the nutrient loading in the effluent, through open-air treatments: sedimentation ponds, foam fractionation, mass production of phytoplankton, and rearing of molluscs on the...
Tipo: Text
Palavras-chave: Fish; Shrimp; Pond management; Effluents; Treatment.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00016/12728/9650.pdf

Effect of an herbivorous diet on energy balance of Litopenaeus vannamei at selected ontogenetic stages
Provedor de dados: 5
Autores: Maldonado, Carlos; Cuzon, Gerard; Guzman, Emilio; Brito, Roberto; Soto, Luis; Arena, Leticia; Gaxiola, Gabriela.
Herbivorous (20% vegetable protein, 40% carbohydrate) and carnivorous diets (40% marine animal protein, 20% carbohydrate) were experimentally tested to assess their effect on the energy balance and energetic substrates utilized by postlarvae (PL's /15 days) and juvenile shrimp (3-6 g) of Litopenaeus vannamei. Postlarval stage 60 (PL60, early juveniles) shrimps fed HeD and CaD diets, then late juveniles (3-6 g) acclimated to the same diets were tested for their respective energy partitioning potential. No significant differences (p&gt;0.05) on growth were obtained in early juveniles (mean final wet weight of 0.19 g). However in late juvenile stages a significant difference (p&lt;0.05) in growth rate was observed. In terms of energy partitioning, both early...
Tipo: Text
Palavras-chave: Energy; Juveniles; Metabolism; Protein sources; Shrimp.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-7402.pdf

NMR structure of mussel mytilin, and antiviral-antibacterial activities of derived synthetic peptides
Provedor de dados: 5
Autores: Roch, Philippe; Yang, Y; Toubiana, Mylene; Aumelas, A.
Mytilin is a 34-residue antibacterial peptide from the mussel Mytilus galloprovincialis, which in addition possesses in vitro antiviral activity. The three-dimensional solution structure of the synthetic mytilin was established by using 1H NMR and consists of the common cysteine-stabilized alpha beta motif close to the one observed in the mussel defensin MGD-1. Mytilin is characterized by 8 cysteines engaged in four disulfide bonds (2-27, 6-29, 10-31, and 15-34) only involving the beta-strand II. Hydrophilic and hydrophobic areas of mytilin account for 63% and 37%, respectively, a ratio very close to that of MGD-1 (64% and 36%). One linear and three cyclic fragments were designed from the interstrand loop sequence known to retain the biological activities...
Tipo: Text
Palavras-chave: Shrimp; Molluscs; Mussel; Antibacterial activity; WSSV; Viral protection; Beta hairpin structure; NMR; Mytilin; Antimicrobial peptide.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4485.pdf

Occurrence of Deferribacterales and Entomoplasmatales in the deep-sea Alvinocarid shrimp Rimicaris exoculata gut
Provedor de dados: 5
Autores: Zbinden, Magali; Cambon-bonavita, Marie-anne.
The phylogenetic diversity of the gut microbial population of the hydrothermal shrimp Rimicaris exoculata was determined. The presence of micro-organisms in the hindgut of the shrimp was determined, and their morphology illustrated for the first time by transmission electron microscopy. DNA was extracted from the fore-, mid- and hindgut of shrimps collected at the Rainbow site, at the Mid-Atlantic Ridge, and the sequences of the small-subunit rRNA (16S rDNA) were analyzed. Seven different bacterial phylotypes were identified from the 90 clones screened. The sequences were affiliated to three major groups: epsilon-Proteobacteria (48,8%), Entomoplasmatales (23.3%) and representatives of the new phylum Deferribacteres (26.6%). These results show that the...
Tipo: Text
Palavras-chave: Metal bioremediation; Indigenous gut microllora; Genetic diversity; Shrimp; Hydrothermal vent.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-778.pdf

Crustaces profonds captures aux casiers aux Antilles françaises - 1996
Provedor de dados: 5
Autores: Paulmier, Gerard.
For several years the fishermen of the West Indies have directed their activities towards new fishing grounds, notably the bathyales zones adjacent to island plateaux up to approximately 1000 metres in depth. Explorations carried out since 1989 have shown that diverse crustacean populations could be exploited. However, populations and exploitable stocks are not well known. The use of crustaceans traps as a fishing technique permits the capture of shellfish, shrimps and prawns of which at least six species could have commercial interest. The main objective of this work is do draw up an inventory of the principal commercial species as well as the accompanying species belonging to the subordres Decapoda macrura, anomura, brachyura and to the orders Isopoda...
Tipo: Text
Palavras-chave: Crab; Prawn; Shrimp; Depth; Crustaceas; Inventory; French Antillean; Crabe; Langoustine; Crevette; Profond; Crustace; Inventaire; Antilles françaises.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/1996/rapport-1543.pdf

Interactions of deep-sea vent invertebrates with their environment: The case of Rimicaris exoculata
Provedor de dados: 5
Autores: Schmidt, Caroline; Le Bris, Nadine; Gaill, F.
The vent shrimp Rimicaris exoculata thrives around many hydrothermal vent sites along the Mid-Atlantic Ridge (MAR), where it aggregates into dense swarms. In contrast to hydrothermal vent fields at the East Pacific Rise (EPR), where the biomass is dominated by tubeworms, clams, and mussels, this shrimp is one of the major animal species at MAR vents. These animals are found in the dynamic mixing interface between cold oxygenated seawater and hot, reduced hydrothermal vent fluid. The adaptation of this shrimp to the hostile deep-sea hydrothermal environment and its survival strategy has been investigated since their discovery at the TAG site in the late 1980s. Rimicaris exoculata is now known to colonize black smoker complexes along the MAR in the...
Tipo: Text
Palavras-chave: Extreme environments; Microorganisms; Chemosynthesis; Biomineralization; Symbiosis; Deep sea; Hydrothermal vents; Mid Atlantic Ridge; Shrimp.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-3925.pdf

Maximum Economic Yield Fishery Management in the Face of Global Warming
Provedor de dados: 5
Autores: Diop, Bassirou; Sanz, Nicolas; Junior Duplan, Yves Jamont; Guene, El Hadji Mama; Blanchard, Fabian; Pereau, Jean-christophe; Doyen, Luc.
This paper deals with fishery management in the face of the ecological and economic effects of global warming. To achieve this, a dynamic bioeconomic model and model-based scenarios are considered, in which the stock's growth function depends on the sea surface temperature. The model is empirically calibrated for the French Guiana shrimp fishery using time series collected over the period 1993–2009. Three fishing effort strategies are then compared under two contrasted IPCC climate scenarios (RCP 8.5 and RCP 2.6). A first harvesting strategy maintains the Status Quo in terms of fishing effort. A more ecologically-oriented strategy based on the closure of the fishery is also considered. A third strategy, which relates to Maximum Economic Yield (MEY), is...
Tipo: Text
Palavras-chave: Renewable resources; Fishery bioeconomic model; Climate change; Climate scenarios; Adaptation; Shrimp.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00453/56418/58115.pdf

Influence of temperature, pH and NaCl concentration on the maximal growth rate of Brochothrix thermosphacta and a bioprotective bacteria Lactococcus piscium CNCM I-4031
Provedor de dados: 5
Autores: Leroi, Francoise; Fall, Papa-abdoulaye; Pilet, Marie-france; Chevalier, Frederique; Baron, Regis.
The maximum specific growth rate (μmax) of Brochothrix thermosphacta, a spoilage bacteria of cooked peeled shrimp, and Lactococcus piscium CNCM I-4031, a bioprotective strain, was investigated under different conditions of temperature, NaCl concentrations and pH. The basic modelling approach used was the Gamma concept (γ-concept) and the model developed was then adapted to shrimp. Cardinal growth parameters were quite similar for the two strains, except for NaCl. No NaCl was required for growth and the NaClmax was three-times higher for B. thermosphacta than for L. piscium (62 and 23 g l−1 respectively). However, tolerance to NaCl was higher in seafood than in liquid broth, possibly due to presence of osmoltically active molecules. L. piscium and B....
Tipo: Text
Palavras-chave: Modelling; Biopreservation; Shrimp; Lactic acid bacteria; Brochothrix thermosphacta; Spoilage bacteria; Environmental conditions.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00083/19473/17088.pdf

Blow Your Nose, Shrimp! Unexpectedly Dense Bacterial Communities Occur on the Antennae and Antennules of Hydrothermal Vent Shrimp
Provedor de dados: 5
Autores: Zbinden, Magali; Gallet, Alison; Szafranski, Kamil M.; Machon, Julia; Ravaux, Juliette; Leger, Nelly; Duperron, Sebastien.
In crustaceans, as in other animals, perception of environmental cues is of key importance for a wide range of interactions with the environment and congeners. Chemoreception involves mainly the antennae and antennules, which carry sensilla that detect water-borne chemicals. The functional importance of these as exchange surfaces in the shrimp's sensory perception requires them to remain free of any microorganism and deposit that could impair the fixation of odorant molecules on sensory neurons. We report here the occurrence of an unexpected dense bacterial colonization on surface of the antennae and antennules of four hydrothermal vent shrimp species. Microscopic observation, qPCR and 16S rRNA barcoding reveal the abundance, diversity and taxonomic...
Tipo: Text
Palavras-chave: Hydrothermal; Shrimp; Alvinocarididae; Chemosensory perception; Antennules; Bacteria; Grooming.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00484/59527/62507.pdf

Validation du TED et essais d'une nouvelle grille sélective dans la pêcherie crevettière de Guyane2007
Provedor de dados: 5
Autores: Meillat, Marc; Morandeau, Fabien; Achoun, Joseph; Barthelemy, Patricia.
This work is in line with the fishing technology section of the DUHAL (Durability of Halieutic activities) action. It aims to reduce the "side" catches associated with shrimp fishing in French Guyana. Shrimp trawling is indeed considered as one of the fishing activities which generates the most waste. The campaign carried out in November/December 2006 had lead to the following conclusions [...]
Tipo: Text
Palavras-chave: Bycatch Reducing Device; Radial Escape Section; Duhal; Survey campaign; Shrimp; Selectivity; Grille Nordmore; Mailles carrées; BRD; RES; TED; Duhal; Grille; Campagne à la mer; Crevette; Sélectivité.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/rapport-6683.pdf

Heat-shock response and temperature resistance in the deep-sea vent shrimp Rimicaris exoculata
Provedor de dados: 5
Autores: Ravaux, Juliette; Gaill, Françoise; Le Bris, Nadine; Sarradin, Pierre-marie; Jollivet, Didier; Shillito, Bruce.
The shrimp Rimicaris exoculata swarms around hydrothermal black smoker chimneys at most vent sites along the Mid-Atlantic Ridge. This species maintains close proximity to the hydrothermal fluid, where temperatures can reach 350degreesC and steep thermal and chemical gradients are expected. We performed in vivo experiments in pressurized aquaria to determine the upper thermal limit [critical thermal maximum (CTmax)] of R. exoculata and to investigate some characteristics of the shrimp stress response to heat exposure. These experiments showed that the shrimp does not tolerate sustained exposure to temperatures in the 33-37degreesC range (CTmax). A heat-inducible stress protein belonging to the hsp70 family was identified in R. exoculata, and its synthesis...
Tipo: Text
Palavras-chave: Heat shock; Shrimp; Rimicaris exoculata; Chaperone; IPOCAMP; Caridae; Crustacea; Thermal stress; Hydrothermal vent.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-417.pdf

Toxic factors of Vibrio strains pathogenic to shrimp
Provedor de dados: 5
Autores: Goarant, Cyrille; Herlin, Jose; Brizard, Raphael; Marteau, Anne-laure; Martin, C; Martin, B.
Vibriosis is a major disease problem in shrimp aquaculture. 'Syndrome 93' is a seasonal juvenile vibriosis caused by Vibrio penaeicida which affects Litopenaeus stylirostris in grow-out ponds in New Caledonia. This study assessed the toxic activities of extracellular products (ECPs) from V: penaeicida, V. alginolyticus and V, nigripulchritudo using in vivo injections in healthy juvenile L. stylirostris (= Penaeus stylirostris) and in vitro assays on shrimp primary cell cultures and the fish cell line epithelioma papulosum cyprini (EPC). Toxic effects of ECPs were demonstrated for all pathogenic Vibrio strains tested both in vivo and in vitro, but for shrimp only; no effect was observed on the fish cell line. ECP toxicity for New Caledonian V. penaeicida...
Tipo: Text
Palavras-chave: Vibrio; Vibrio penaeicida; Shrimp; Extracellular products; Temperature.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00000/10543/7600.pdf

Evaluation du probiotique bactérien Pediococcus acidilactici MA18/5M chez la crevette pénéide Litopenaeus stylirostris en Nouvelle- Calédonie
Provedor de dados: 5
Autores: Castex, Mathieu.
P. acidilactici MA 18/5M is a dietary probiotic (BACTOCELL®) which has shown its efficiency on several terrestrial and aquatic species. The present thesis aimed to investigate more fully the effects of this probiotic on cultured penaeid shrimps. For this study, we chose a global approach by replacing the problem studied in a model of interactions between three compartments: the shrimp, its intestinal microflora and the probiotic. Having first defined how the probiotic should be administrated, we studied its effects under controlled laboratory conditions at several levels of Litopenaeus stylirostris biology: (i) Nutritional status and growth, (ii) associated bacterial microflora, and (iii) health status with respect to oxidative stress. Then the probiotic...
Tipo: Text
Palavras-chave: Floating cages; Vibriosis; Oxidative stress; Intestinal microflora; Nutrition; Growth; Shrimp; Pediococcus acidilactici; Probiotic; Cages flottantes; Vibriose; Stress oxydant; Microflore intestinale; Nutrition; Croissance; Crevette; Pediococcus acidilactici; Probiotique.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/these-6814.pdf

A soft technology to improve survival and reproductive performance of Litopenaeus stylirostris by counterbalancing physiological disturbances associated with handling stress
Provedor de dados: 5
Autores: Wabete, Nelly; Chim, Liet; Pham, Dominique; Lemaire, Pierrette; Massabuau, J.
The consequences of handling stress (fishing, transfer, eyestalk ablation) on shrimp broodstock are poorly documented. The weakness of farmed shrimp, Litopenaeus stylirostris, during winter is a major problem in New Caledonia, because of seasonal climate (tropical-sub-temperate). The transfer of broodstock in winter from earthen outdoor ponds to indoor maturation tanks in the hatchery (T=20 degrees C, Salinity=35 parts per thousand, fed shrimp) usually leads, after 48 h, to high mortality (up to 70%). Eyestalk ablation to induce ovarian maturation in females leads to further mortality.   Starting from a background analysis of physiological disturbances (initial osmoregulatory imbalance) associated with handling stress (Wabete, N., Chim, L., Lernaire, P.,...
Tipo: Text
Palavras-chave: Eyestalk ablation; Spawning; Handling stress; Broodstock; Litopenaeus stylirostris; Shrimp.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1880.pdf

Effect of unilateral and bilateral eyestalk ablation in Litopenaeus vannamei male and female on several metabolic and immunologic variables
Provedor de dados: 5
Autores: Sainz Hernandez, J; Racotta, Ilie; Dumas, S; Hernandez Lopez, J.
Eyestalk ablation is the most common procedure to induce gonadic maturation in commercial hatcheries of penaeid shrimp. In addition to reproduction, other physiological and metabolic processes are affected by removal of the X-organ sinus gland complex located in the eyestalk. In this study, the effect of unilateral and bilateral eyestalk ablation on the concentration of several hemolymph metabolites and phenoloxidase system in female and male shrimp was investigated. As a consequence of reducing or suppressing molt-inhibiting hormone (MIH) production, the duration of the molting cycle was significantly shorter in eyestalk-ablated shrimp: bilaterally (10 days), unilaterally (17 days), and shrimp that were not ablated (24 days). Mortality was significantly...
Tipo: Text
Palavras-chave: Sinus gland; Shrimp; Phenoloxidase; Hemolymph metabolites.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-6408.pdf

Cross breeding of different domesticated lines as a simple way for genetic improvement in small aquaculture industries: Heterosis and inbreeding effects on growth and survival rates of the Pacific blue shrimp Penaeus (Litopenaeus) stylirostris
Provedor de dados: 5
Autores: Goyard, Emmanuel; Goarant, Cyrille; Ansquer, Dominique; Brun, Pierre; De Decker, Sophie; Dufour, Robert; Galinie, C; Peignon, Jean-marie; Pham, Dominique; Vourey, Elodie; Harache, Yves; Patrois, Jacques.
Two populations of the Latin American shrimp Penaeus (Litopenaeus)stylirostris domesticated in Hawaii and in New Caledonia were previously shown to be genetically differentiated and proven highly inbred. In New Caledonia, where different Vibriosis affect shrimp production and antibiotic use is banned in growing ponds, the Hawaiian population was introduced to increase the allelic variability available for local shrimp farmers and start a genetic improvement program. Growth and survival rates of the two pure populations and the two-way F-1-hybrids obtained by breeding Hawaiian animals with New Caledonian animals were assessed in several simple experiments (earthen ponds, floating cages and experimental infection challenges) during two years on two...
Tipo: Text
Palavras-chave: Vibriosis; Survival; Growth; Penaeus Litopenaeus stylirostris; Shrimp; Cross breeding; Genetic improvement.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4316.pdf

Temporal variability of benthic-pelagic coupling in shallow enclosed environment: A case study with eutrophying shrimp ponds
Provedor de dados: 5
Autores: Hochard, Sébastien; Royer, Florence; Hubert, Morgane; Lemonnier, Hugues.
The evolution of benthic pelagic coupling was followed in two semi-intensive shrimp ponds in New Caledonia, with a special emphasis on the role of microphytobenthos (MPB). Three distinct periods could be identified. During the first period, MPB activity led to relative decoupling between the water column and the sediment, both compartments being autotrophic with low nutrients exchanges. During the second period, the sediment operated at the edge of a functional switch between autotrophy and heterotrophy. The amplitude of nutrient fluxes depended of the pool considered (DIN, DIP) and showed light dark variation. In the last period, sediment switched to heterotrophy with the establishment of benthic-pelagic coupling concomitantly to a massive sediment...
Tipo: Text
Palavras-chave: Tropical aquaculture; Shrimp; Eutrophication; Benthic-pelagic coupling; Microphytobenthos; Bioturbation.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00485/59681/62754.pdf

Developmental origins of normal and anomalous random right-left asymmetry: lateral inhibition versus developmental error in a threshold trait
Provedor de dados: 16
Autores: Palmer, A.R.
Dramatic examples of right-left asymmetry often inspire adaptive explanations, simply because it is hard to imagine how such forms could not be functionally significant. But are conspicuous morphological asymmetries necessarily adaptive? Surprisingly, in some species where direction of asymmetry is random, asymmetry in bilaterally paired traits may arise as a developmental error in a threshold trait. When cases of asymmetry are rare within a species, they are easily recognized as developmental errors. However, as asymmetrical individuals become more common, or if the asymmetry is in a signaling trait, the temptation to advance an adaptive explanation grows, particularly if the asymmetry is not clearly maladaptive. Several models of the ontogeny of...
Tipo: Article / Letter to the editor
Palavras-chave: Acari; Adaptive significance; Crabs; Crustacea; Developmental models; Diptera; Flies; Hemiptera; Insecta; Lobsters; Mites; Morphological asymmetry; Polyphenism; Shrimp; Stochastic development; True bugs; 42.21.
Ano: 2012
URL: http://www.repository.naturalis.nl/record/419175

The genus Hippolyte Leach, 1814 (Crustacea: Decapoda: Caridea: Hippolytidae) in the East Atlantic Ocean and the Mediterranean Sea, with a checklist of all species in the genus
Provedor de dados: 16
Autores: d'Udekem d'Acoz, C.
The genus Hippolyte Leach in the East Atlantic and the Mediterranean is revised and a list of the world species is given. Eleven species occur in the area studied: H. coerulescens (Fabricius), H. garciarasoi spec. nov., H. inermis Leach, H. lagarderei d'Udekem d'Acoz, H. leptocerus (Heller), H. leptometrae Ledoyer, H. niezabitowskii spec. nov., H. palliola Kensley, H. prideauxiana Leach, H. sapphica d'Udekem d'Acoz, H. varians Leach. An elaborate key, complete descriptions and illustrations of all species are provided, while their ecology is discussed in detail. A morphological account is also given for the species occuring in the Suez Canal: H. proteus (Paulson) and H. ventricosa H. Milne Edwards. It is shown that H. prideauxiana (previously H. huntii)...
Tipo: Article / Letter to the editor
Palavras-chave: Crustacea; Decapoda; Caridea; Hippolytidae; Hippolyte; Shrimp; Systematics; Discontinu- ous variations; Neoteny; Ecology; East Atlantic; Mediterranean; World species list.; 42.74.
Ano: 1996
URL: http://www.repository.naturalis.nl/record/317714

Digestive endo-proteases from the midgut glands of the Indian white shrimp, Penaeus Indicus (Decapoda: Penaeidae) from Kenya
Provedor de dados: 20
Autores: Omondi, J.G.
In order to provide information on the digestive capacity of marine crustacea of mariculture potential in Kenya with a view to aiding the development of suitable feeds to support the industry, a biochemical survey was made of enzymes of extracellular digestion in the Indian White shrimp, Penaeus indicus. Results showed midgut gland endo-proteases in wild adult shrimp from the Kenya coast to have optima between pH 7.2 and 8.5 (Trypsin pH 7.5-8.0, Chymotrypsin pH 7.2-7.8, Elastase pH 6.8-8.5) with maximum specific activities of 101-408, 37-516, 70-90 Units mg protein-1 min-1 for trypsin, chymotrypsin and elastase respectively. There was no pepsin. The North Sea Norway lobster, Nephrops norvegicus, was investigated to a lesser extent and found to have much...
Tipo: Journal Contribution
Palavras-chave: Shrimp; Crustacea; Midgut gland; Lobster; Digestive endo-proteases; Enzyme inhibitors; Hepatopancreas NEPHROPS NORVEGICUS PENAEUS INDICUS Marine crustaceans Mariculture Biochemical analysis Shrimp culture.
Ano: 2005
URL: http://hdl.handle.net/1834/1141

Lettre de l'IMROP, 6-8
Provedor de dados: 20
Autores: IMROP.
Lettre trimestrielle d'information de l'Institut Mauritanien de Recherches Océanographiques et des Pêches
Tipo: Other
Palavras-chave: Experimental fishing; Fishery management; Fishing gear; Mathematical models; Oceanographic institutions; Quality assurance; Quality control; Shrimp; Fishery management; Fishing gear; Mathematical models; Quality assurance.
Ano: 2005
URL: http://hdl.handle.net/1834/1203

Description of two new associated infaunal decapod crustaceans (Axianassidae and Alpheidae) from the tropical eastern Pacific
Provedor de dados: 84
Autores: Anker,Arthur; Lazarus,Juan Felipe.
Two new species of infaunal decapod crustaceans are described based on material collected in Bahía Málaga, Pacific coast of Colombia, in 2009. The mud-shrimp Axianassa darrylfelderi sp. nov. (Axianassidae) appears to be most closely related to A. australis Rodrigues &amp; Shimizu, 1992, A. canalis Kensley &amp; Heard, 1990, and A. jamaicensis Kensley &amp; Heard, 1990. The new species may be distinguished from each of them by a combination of morphological features, mainly on the uropodal exopod, antennal acicle, third maxilliped and first pleonite. The shrimp Leptalpheus canterakintzi sp. nov. (Alpheidae), associated with burrows of A. darrylfelderi sp. nov., undoubtedly represents the eastern Pacific sister species of the western Atlantic L. axianassae...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Decapoda; Shrimp; Mud-shrimp; Infauna; Symbiosis; Axianassidae; Alpheidae; Axianassa; Leptalpheus; Transisthmian species; East Pacific; New species; New record.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492015000800115

Rice versus Shrimp Production in Thailand: Is There Really a Conflict?
Provedor de dados: 31
Autores: Mekhora,   Thamrong; McCann,   Laura M.J.
Shrimp farming in Thailand has had disastrous effects on the environment in the past, which has prompted a government ban on shrimp production in inland areas.  However, a new low-salinity shrimp farming system has developed that seems to have fewer disease and environmental problems than previous systems but competes with rice production for land and water resources.  The present study found that shrimp farming exhibits increasing returns to scale and is much more profitable than rice farming, which offers opportunities for rice farmers to improve their incomes through diversification.  No evidence was found for external environmental effects of shrimp production on rice production or vice versa.  A total ban on shrimp production in rice farming areas...
Tipo: Journal Article
Palavras-chave: Environment; Rice; Shrimp; Technical change; Thailand; Q12; Q16; Q24; Q28.
Ano: 2003
URL: http://purl.umn.edu/43217

U.S. Demand for Source–Differentiated Shrimp: A Differential Approach
Provedor de dados: 31
Autores: Jones,   Keithly G.; Harvey,   David J.; Hahn,   William F.; Muhammad,   Andrew.
Estimates of price and scale elasticities for U.S. consumed shrimp are derived using aggregate shrimp data differentiated by source country. Own-price elasticities for all countries had the expected negative signs, were statistically significant, and inelastic. The scale elasticities for all countries were positive and statistically significant at the 1% level with only the United States and Ecuador having scale elasticities of less than one. For the most part, the compensated demand effects showed that most of the cross-price effects were positive. Our results also suggest that despite the countervailing duties imposed by the United States, shrimp demand was fairly stable.
Tipo: Journal Article
Palavras-chave: CBS; Conditional demand; Countervailing duty; Imports; Scale elasticity; Shrimp; Agribusiness; Farm Management; Food Consumption/Nutrition/Food Safety; Production Economics; C32; D12; Q13; Q22.
Ano: 2008
URL: http://purl.umn.edu/47202

Econometric analysis on economies of scale: An application to rice and shrimp production in Thailand
Provedor de dados: 31
Autores: Mekhora,   Thamrong.
Shrimp production in Thailand has historically been undertaken in the saline and brackish waters of coastal mangroves. In recent years rising demand and prices for shrimp and falling productivity of mangrove areas have motivated an expansion of shrimp production into the fresh-water margins of river estuaries that were previously used for rice cultivation. Generalised additive models, which offer a comprehensive approach to regression analysis, are mainly used for empirical analysis, and model development and specification for rice and shrimp production in this study. This paper presents a brief introduction to generalised additive models, discusses how they are applied to develop cost functions to satisfy the restriction of production theory, and...
Tipo: Presentation
Palavras-chave: Rice; Shrimp; Returns to scale.; Agribusiness; Environmental Economics and Policy.
Ano: 1999
URL: http://purl.umn.edu/124086

Performance and immunological resistance of Litopenaeus vannamei fed a β-1,3/1,6-glucan-supplemented diet after per os challenge with the Infectious myonecrosis virus (IMNV)
Provedor de dados: 96
Autores: Sabry Neto,Hassan; Nunes,Alberto Jorge Pinto.
This study determined the efficacy of a β-1,3/1,6-glucan source on the survival, growth, and immunological responses of Litopenaeusvannamei challenged with infectious myonecrosis virus (IMNV). The work was conducted in 20 tanks of 500 L with clear water with constant recirculation and aeration. Shrimp weighing 2.6±0.4 g were stocked at 100 animals/m2 and reared for 10 weeks. Viral challenge occurred through oral administration of IMNV positive extract (1.82 £ × 103 copies of IMNV/µL RNA) during three consecutive days, twice a day. One treatment and three controls, with five replicatetanks each, were used, as follows: Com - commercial diet fed to non-challenged shrimp (NCS); Ref - lab-manufactured basal diet, deprived of β-1,3/1,6- glucan fed to NCS;...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Betaglucan; Shrimp.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982015000500165

Increasing feed allowance in low-fish meal diets allows for a reduction in dietary methionine for juvenile Litopenaeus vannamei raised in green-water tanks
Provedor de dados: 96
Autores: Façanha,Felipe Nobre; Sabry-Neto,Hassan; Oliveira-Neto,Adhemar Rodrigues de; Figueiredo-Silva,Claudia; Nunes,Alberto Jorge Pinto.
ABSTRACT A 10-week study was conducted to evaluate the effect of feed allowance and graded levels of dietary methionine (Met) on growth performance of Litopenaeus vannamei. Juvenile shrimp of 1.83±0.14 g were stocked in 42 outdoor green-water tanks of 1 m3 under 120 shrimp m−2. Animals were fed under two feed allowances, regular and 30% in excess. Five diets with 30 g kg−1 fishmeal were designed to contain 318±2 g kg−1 crude protein and a minimum amount of protein-bound Met. To achieve graded levels of dietary Met, a control diet with 4.6 g kg−1 Met or 8.9 g kg−1 methionine + cysteine (M+C) was supplemented with 1.2, 2.2, 3.2, and 4.2 g kg−1 of DL-methionyl-DL-methionine to result in total dietary Met of 5.6, 6.9, 7.9, and 9.2 g kg−1 (10.0, 11.2, 12.1, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amino acid supplementation; Ration size; Shrimp; Supplementation.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100157

Larval development of the rock shrimp Rhynchocinetes typus Milne Edwards, 1937 (Decapoda, Caridea) reared in the laboratory
Provedor de dados: 97
Autores: DUPRÉ,ENRIQUE; FLORES,LUIS; PALMA,SERGIO.
The first description of the larval stages of a representative of the family Rhynchocinetidae from the southeastern Pacific coast of South América is presented. Larvae of the rock shrimp Rhynchocinetes typus, from rocky subtidal environment of the Chile-Pera coast were reared in the laboratory at 22 °C, salinity 32 and feeding with Anemia franciscana. Seven zoeal stages, which occur through 10 successive moults, are described and illustrated in detail. Morphological comparison made between R. typus and other congeneric and related species belonging to Rhynchocinetid showed the main characteristic for the diagnosis of zoeal stages are: (a) the pereiopods appear in the third stage, (b) the exopod of the antennae have six segments, and (c) no pleopods were...
Tipo: Journal article
Palavras-chave: Larval development; Shrimp; Rhynchocinetes; Caridea.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2008000200001

Crescimento e fator de condição na fase juvenil de Farfantepenaeus brasiliensis (Latreille) e F. paulensis (Pérez-Farfante) (Crustacea, Decapoda, Penaeidae) em uma lagoa costeira tropical do Rio de Janeiro, Brasil
Provedor de dados: 104
Autores: Albertoni,Edélti Faria; Palma-Silva,Cleber; Esteves,Francisco de Assis.
The growth relations of the shrimps Farfantepenaeus brasiliensis (Latreille, 1817) and F. paulensis (Pérez-Farfante, 1967) were evaluated at Imboassica lagoon, Macaé, Rio de Janeiro State, between June 1995 and September 1997, in four periods after events of sandbar opening. This sandbar separated the lagoon from the Atlantic Ocean. Through the evaluation of the weight/length relationships for the two species, significant differences in each interval after the sandbar openings were observed, as much among males and females as among all individuals of the same species. The results indicated that both species presented negative allometric growth in most of the studied occasions. The frequency and abundance of the two species in the lagoon is linked to many...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Morphometry; Shrimp; Weight/length relationship.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000300008

Foam-mat drying of shrimp: characterization and drying kinetics of foam
Provedor de dados: 111
Autores: Azizpour, Mehran; Mohebbi, Mohebbat; Khodaparast, Mohammad Hossein Haddad; Varidi, Mehdi.
The effects of water: shrimp ratio and xanthan gum (XG) concentration on characteristics of shrimp foam were investigated.  Foams were prepared from shrimp puree by adding several xanthan gum concentrations (0.1, 0.2, 0.3 % w/w), water: shrimp ratios (2:1, 3.5:1, 5:1 w/w) and whipped for five minutes.  Incorporation of 0.2% w/w XG with 3.5:1 w/w water: shrimp ratio was selected because of having better characteristics of produced foams and then dried at 50, 60 and 70°C.  Results showed that stability and density of foam increased with increasing xanthan gum concentration.  However, increasing water : shrimp ratio caused to decrease in stability and density of foam.  As the temperature increased from 50 to 70°C, the drying time decreased to 55 minutes....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Activation energy; Effective diffusivity; Foam-mat drying; Foam characteristics; Modeling; Shrimp.
Ano: 2013
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2339

The influence of environmental variables in the reproductive performance of Macrobrachium amazonicum (Heller, 1862) (Caridea: Palaemonidae) females in a continental population
Provedor de dados: 42
Autores: PANTALEÃO,JOÃO ALBERTO F.; CARVALHO-BATISTA,ABNER; TEODORO,SARAH S.A.; COSTA,ROGÉRIO C.
ABSTRACT Macrobrachium amazonicum is a commercially important freshwater prawn with a high degree of reproductive plasticity. The species is classified into two groups: coastal populations, with larger individuals exhibiting high fecundity and needing brackish water for larval development; and continental populations, with smaller specimens exhibiting low fecundities and completing metamorphosis in freshwater. The objective of this study was to investigate the influence of environmental factors in the fecundity, egg size and volume, and reproductive output in females of M. amazonicum from a continental population during a two-year period. We also compared our results with those obtained for other continental and coastal populations. Reproductive parameters...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon river prawn; Shrimp; Tietê; Abiotic factors; Reproductive output.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401445

Histomorphologic characterization of the hepatopancreas of freshwater prawn Macrobrachium rosenbergii (De Man, 1879)
Provedor de dados: 45
Autores: Silva,M.A.S.; Almeida Neto,M.E.; Ramiro,B.O.; Santos,I.T.F.; Guerra,R.R.
ABSTRACT This study aimed to describe the Macrobrachium rosenbergii hepatopancreas histomorphology. The hepatopancreas is constituted by a set of blind end tubules, divided into proximal, middle, and distal regions, with the epithelium formed by E, F, B, R, and M cells differently of other species. Measurements of the length and width of the tubules were 419.64+69.09µm and 117.42+16.99µm, respectively. The percentage of each cell type per region was: proximal region (40%B, 20%F, 6.7%M, 33.3%R), middle region (45.4%B, 18.2%F, 9.1%M, and 27.3%R) and distal region (36.4%E, 27.2%B, 18.2%F, 9.1%M, 9.1%R). Cell B that stores glycogen and lipids, is the most commonly found cell in proximal and middle regions. In the distal region, the E, responsible for the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Digestive gland; Digestive histology; Digestive morphology; F cell; Shrimp.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000501539

The effect of temperature, salinity and nitrogen products on food consumption of pink shrimp Farfantepenaeus paulensis
Provedor de dados: 52
Autores: Wasielesky Jr.,Wilson; Bianchini,Adalto; Castaño Sanchez,Cecilia.; Poersch,Luis Henrique.
Studies were carried out to investigate the effect of temperature, salinity, ammonia, nitrite and nitrate on food consumption of pink shrimp Farfantepenaeus paulensis. Juveniles (0.2 - 0.4 g) were acclimated for 15 days in seawater with different temperatures, salinities and concentrations of ammonia, nitrite and nitrate. After the acclimation period, 20 shrimps per treatment were individualized in order to have their ration intake analyzed through the amount of ration offered and left over within a 24-hour period. Mean food consumption presented significant alterations (P&lt;0.05) for the tested temperatures and nitrite concentrations, whereas for the salinity, ammonia and nitrate treatments, shrimp presented no alteration on food intake (P&gt;0.05)....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Culture; Food consumption; Shrimp; Water quality.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000100019

Culturable fungal diversity of shrimp Litopenaeus vannamei boone from breeding farms in Brazil
Provedor de dados: 58
Autores: Silva,Lidiane Roberta Cruz da; Souza,Odacy Camilo de; Fernandes,Maria José dos Santos; Lima,Débora Maria Massa; Coelho,Rosalie Reed Rodrigues; Souza-Motta,Cristina Maria.
Litopenaeus vannamei, which is the most common shrimp species cultivated in the northeast of Brazil, is very susceptible to microbial diseases, and this consequently affects productivity. There are reports of bacteria, viruses and protozoa in these shrimp, but not fungi. This study aims to isolate and identify fungi present in shrimp Litopenaeus vannamei, and in their nursery waters, at two breeding farms in Brazil. The pathogenic potential of the isolates was assessed through the qualitative detection of proteases and aflatoxin B production. The 146 isolated fungi comprised 46 species. Aspergillus, Penicillium and Furarium were the three most relevant genera and Aspergillus flavus was the predominant species with a total of 33 isolates. Most of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Shrimp; Fungi; Water; Protease; Aflatoxin B.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000100007

Molecular variations in Vibrio alginolyticus and V. harveyi in shrimp-farming systems upon stress
Provedor de dados: 58
Autores: Santhyia,Anix Vivek; Mulloorpeedikayil,Rosalind George; Kollanoor,Riji John; Jeyaseelan,Prince M.J.
A study was performed to investigate the genomic variations in the shrimp farm isolates of Vibrio alginolyticus and V. harveyi when the isolates were subjected to environmental stress. Samples of shrimps, water and sediment were collected from Southern Indian coastal shrimp farms. Vibrio isolates were biochemically identified and confirmed using 16S rDNA and gyrB gene specific PCR. The bacterial strains were genotyped by PCR fingerprinting using GTG(5) and IS (Insertion Sequence) primers. Seven strains each of V. alginolyticus and V. harveyi were subjected to 10 passages through trypticase soya broth (TSB), which contained different NaCl concentrations (3, 6 and 8%) and trypticase soya agar (TSA). V. alginolyticus was also passaged through TSB with a 12%...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vibrio harveyi; Vibrio alginolyticus; Molecular variation; Shrimp; Penaeus monodon.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000401001

Biofilm formation by Vibrio parahaemolyticus on different surfaces and its resistance to sodium hypochlorite
Provedor de dados: 65
Autores: Rosa,Janaina Viana da; Conceição,Natália Volpato da; Conceição,Rita de Cássia dos Santos da; Timm,Cláudio Dias.
ABSTRACT:  Vibrio parahaemolyticus is an important pathogen for both fish industry and consumers. It forms biofilm which makes it difficult to eliminate this microorganism using sanitizers. This study aimed to assess biofilm formation on different surfaces and effect of biofilm on resistance to sanitizers. Eight isolates of biofilm-forming V. parahaemolyticus were tested for the ability to form biofilms on a number of surfaces including high density polyethylene, stainless steel, glass, exoskeleton of Farfantepenaeus paulensis (Pink Shrimp), and operculum of Micropogonias furnieri (Whitemouth Croaker). Efficiency of sanitizer sodium hypochlorite against the bacteria was evaluated in the biofilms formed on the surface of the materials used; out the eight...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacterial contamination; Sanitizers; Food safety; Fish; Shrimp.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018001200451

Growth and feed utilization of the shrimp Farfantepenaeus paulensis fed diets containing different marine protein sources
Provedor de dados: 65
Autores: Cavalli,Ronaldo Olivera; Zimmermann,Sérgio; Speck,Roger Crippa.
Five isonitrogenous and isoenergetic diets containing different protein sources (fish, squid and mussel meals and their combinations at the proportions of 40, 30 and 30% or 60, 20 and 20%) were fed for 28 days to Farfantepenaeus paulensis. Growth performance and feed utilization of shrimp fed the fish meal-based diet was comparatively inferior to those fed other protein sources or their combinations. This indicates that fish meal may not be the best protein source for F. paulensis. Feeds containing a mixture of protein sources are better utilized by F. paulensis and therefore result in significantly higher growth than those containing a single protein source.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Shrimp; Farfantepenaeus paulensis; Growth; Feed utilization; Protein sources.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782004000300036