Consulta: subjectFacets:"Fish farming"
Registros recuperados: 29
Data/hora: 11/06/2024 00:26:31

SOIL COMPACTION AND THE STABILITY OF LEVEES OF AQUACULTURE PONDS
Provedor de dados: 70
Autores: Magalhães,Esner R. S.; Freitas,Carlos E. de C.; Neves Junior,Afrânio F.; Silva Filho,Francisco C. da.
ABSTRACT The aim of this work was to evaluate the effects of variations in soil compaction on the stability of the slope embankments of fish farms used in aquaculture. Computational modeling was performed using the RocScience Slide 6.0 program, simulating filling scenarios, fast lowering and stationary regimes for the full operation of the fish farms. The data used in these simulations were obtained from soil characterization tests in the laboratory. The geometry of the levees, the inclination of the slopes and the crest width and height, also necessary for modeling, were obtained from field data and technical projects. The modeling generated a safety factor (SF) for the upstream and downstream slopes of the levees, considering different upstream slopes,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture; Fish farming; Soils; Levees; Stability.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000500555

Influence of water temperature on the economic value of growth rate in fish farming: The case of sea bass (Dicentrarchus labrax) cage farming in the Mediterranean
Provedor de dados: 5
Autores: Besson, M.; Vandeputte, Marc; Van Arendonk, J. A. M.; Aubin, J.; De Boer, I. J. M.; Quillet, E.; Komen, H.
In sea cage farming, fish are exposed to seasonal variations of water temperature, and these variations can differ from one location to another. A small increase in water temperature does not only stimulate growth of the fish (until an optimal level) but also lowers dissolved oxygen concentration in water. Dissolved oxygen may then become a rearing constraint during the production cycle if the oxygen requirement of fish is higher than the supply. The impact of this constraint on production parameters (stocking density of cages and/or batch rotation) and thus on economic profit of a farm will depend on both local thermal regime and growth potential of the fish. Increased growth is one of the most important traits in a breeding objective to increase...
Tipo: Text
Palavras-chave: Economic values; Bioeconomic model; Fish farming; Genetic improvement; Temperature; Thermal growth coefficient.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00332/44361/43964.pdf

Economic values of growth and feed efficiency for fish farming in recirculating aquaculture system with density and nitrogen output limitations: a case study with African catfish (Clarias gariepinus)
Provedor de dados: 5
Autores: Besson, M.; Komen, H.; Aubin, J.; De Boer, I. J. M.; Poelman, M.; Quillet, Edwige; Vancoillie, C.; Vandeputte, Marc; Van Arendonk, J A M.
In fish farming, economic values (EV) of breeding goal traits are lacking, even though they are key parameters when defining selection objectives. The aim of this study was to develop a bioeconomic model to estimate EV of 2 traits representing production performances in fish farming: the thermal growth coefficient (TGC) and the feed conversion ratio (FCR). This approach was applied to a farm producing African catfish (Clarias gariepinus) in a recirculating aquaculture system (RAS). In the RAS, 2 factors could limit production level: the nitrogen treatment capacity of the biofilter or the fish density in rearing tanks at harvest. Profit calculation includes revenue from fish sales, cost of juveniles, cost of feed, cost of waste water treatment, and fixed...
Tipo: Text
Palavras-chave: Economic values; Feed conversion ratio; Fish farming; Recirculating aquaculture system; Selective breeding; Thermal growth coefficient.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00245/35593/34277.pdf

Les bases zootechniques et biologiques de l'élevage des poissons marins
Provedor de dados: 5
Autores: Person, Jeannine.
In this synthesis of nearly 30 years of research on marine fish breeding (turbot, Scophthalmus maximus; sole, Solea solea; bass, Dicentrarchus labrax and sea bream, Sparus aurata) we present the main results acquired during the three periods devoted (1) to establishing zootechnical bases of marine fish breeding in general, theme 1, (2) to developing compound feeds adapted to young stages and optimising the feeds for juveniles, theme 2, and finally (3) to studying the impact of environmental factors on the growth capacity of sea fish juveniles, theme 3.  Some references relating to the preliminary work on sea fish farming are given at the end of the report as well as, for each stage of this research, articles considered as the most important. The...
Tipo: Text
Palavras-chave: Adaptative capacity; Feeding; Juveniles; Larvae; Zootechnics; Production; Fish farming.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/rapport-2080.pdf

Introduction à l'aquaculture des poissons - Analyse de la filière "Pisciculture"
Provedor de dados: 5
Autores: Harache, Yves.
Tipo: Text
Palavras-chave: Fish species; World trade; Fish farming.
Ano: 1993
URL: http://archimer.ifremer.fr/doc/1993/rapport-1563.pdf

Economic and Environmental Impacts of Improving Growth Rate and Feed Efficiency in Fish Farming Depend on Nitrogen and Density Limitation
Provedor de dados: 5
Autores: Besson, Mathieu; Komen, H; Vandeputte, Marc; Aubin, Joel; De Boer, I J M; Van Arendonk, J A M.
The aim of fish breeding is to increase profit by producing faster growing fish with lower feed intake. However, little is known about the economic and environmental impacts of selective breeding programs for fish. We modelled a fish farm producing African catfish in a Recirculating Aquaculture System (RAS) to calculate economic values of growth rate and feed efficiency with production limited by fish density in rearing tanks and fish nitrogen emission. We also calculated “environmental values” with Life Cycle Assessment. The economic and environmental values of growth rate and feed efficiency depended on the limiting factor. When nitrogen was the limiting factor, economic and environmental values of growth rate were zero. But, on the other hand, feed...
Tipo: Text
Palavras-chave: Economic values; Environmental impacts; Fish farming.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00205/31641/30046.pdf

Polyploid fish and shellfish: Production, biology and applications to aquaculture for performance improvement and genetic containment
Provedor de dados: 5
Autores: Piferrer, Francesc; Beaumont, Andy; Falguiere, Jean-claude; Flajshans, Martin; Haffray, Pierrick; Colombo, Lorenzo.
Polyploids can be defined as organisms with one or more additional chromosome sets with respect to the number most frequently found in nature for a given species. Triploids, organisms with three sets of homologous chromosomes, are found spontaneously in both wild and cultured populations and can be easily induced in many commercially relevant species of fish and shellfish. The major consequence of triploidy is gonadal sterility, which is of advantage in the aquaculture of molluscs since it can result in superior growth. In fish, the induction of triploidy is mainly used to avoid problems associated with sexual maturation such as lower growth rates, increased incidence of diseases and deterioration of the organoleptic properties. Triploidy can also be used...
Tipo: Text
Palavras-chave: GMO; Transgenic containment; Genetic containment; Reproductive containment; Hybridisation; Sterility; Fish; Shellfish; Fish farming; Aquaculture; Tetraploidy; Triploidy; Polyploidy.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6648.pdf

Effects on phytoplankton growth of dissolved substances produced by fish farming
Provedor de dados: 5
Autores: Arzul, Genevieve; Clement, Alejandro; Pinier, Anne.
Fish Farming enriches the water column in dissolved organic and inorganic material. These materials excreed by the fish, elutriate from uneaten food and derive from other polluting substances. Ratios of the organic/inorganic forms of substances (for example N and P) are thus modified. Such perturbations in turn affect phytoplankton development. From in vitro analyses and tests of water taken from a turbot rearing tank, we show the changes in seawater chemical composition produced as well as the way growth was modified in three phytoplankton species: the diatom, Chaetoceros gracile, and the dinoflagellates, Gymnodinium cf. nagasakiense and Alexandrium minutum. Elutriates from the granules used for feed (0.1 to 100 mg.l(-1)) were found to be stimulating,...
Tipo: Text
Palavras-chave: Antibiotique; Fécès; Aliment; Aquaculture; Régulation de croissance; Phytoplancton; Urée; Antibiotic; Faeces; Feed; Fish farming; Growth regulation; Phytoplankton; Urea.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00188/29887/28340.pdf

Tanzania Mariculture Investor's Guide
Provedor de dados: 20
Autores: Anon.
This guide describes the permitting process for new mariculture development in Tanzania. Its purpose is to clarify the planning and permitting process for mariculture projects to promote new business development in this area. This will, it is hoped, lead to wise and sustainable investment in the mariculture sector in Tanzania.
Tipo: Book
Palavras-chave: Fish farming; Sea weed farming; Tanzania Mariculture Aquaculture Aquaculture development Aquaculture economics Aquaculture enterprises Aquatic communities Marine aquaculture Aquaculture Aquatic communities http://aims.fao.org/aos/agrovoc/c_550 http://aims.fao.org/aos/agrovoc/c_553.
Ano: 2001
URL: http://hdl.handle.net/1834/1334

Eugenol as an anesthetic for juvenile common snook
Provedor de dados: 86
Autores: Bernardes Júnior,Jurandir Joaquim; Nakagome,Fernando Kojima; Mello,Giovanni Lemos de; Garcia,Silvano; Amaral Júnior,Hilton.
The objective of this work was to evaluate the efficacy of eugenol as an anesthetic for juvenile common snook, and to determine the minimum effective concentration for use in handling procedures. In the first trial, juvenile common snook were subjected to immersion baths at 25, 50, 75, 100, 125, and 150 mg L-1 eugenol concentrations, after which induction and recovery times were evaluated. In the second experiment, the lethal exposure time (LT50) at 75 mg L-1 was estimated. Minimum effective eugenol concentration was 50 mg L-1, andthe stage of deep anesthesia and recovery were, respectively, reached at 126.3 and 208.8 s. At 75 mg L-1, LT50 was 1,314 s, and induction time and recovery were also satisfactory; however, fish cannot tolerate over 229 s exposure.
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Centropomus undecimalis; Anesthesia; Fish farming; Fish handling.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000800052

Biofilter efficiency of Eichhornia crassipes in wastewater treatment of fish farming in Amazonia: Eficiencia de Eichhornia crassipes como biofiltro en el tratamiento de aguas residuales de la piscicultura en el Amazonas
Provedor de dados: 85
Autores: Rubim,MAL; Isolino Sampaio,PR; Parolin,P.
Fish is a very important part of the human diet in Amazonia. Near the growing cities, fish populations and individual size have decreased over the past decades. Alternatives to traditional and industrial fishing arise, including fish farming. Strategies to minimize the impact of fish farms on the environment are needed to have a regular and healthy fsh supply. This is to avoid a reduction of biodiversity, a depletion of natural resources, and/or the induction of significant changes in the structure and functioning of adjacent ecosystems. Very little research has been performed on management of efluents as to maintain the quality of water resources. The present study aimed at testing the efficiency of the Amazonian aquatic macrophyte Eichhornia crassipes as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture; Amazon; Effluent; Fish farming; Biofilters; Aquatic macrophytes; Water hyacinth.
Ano: 2015
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572015000100031

ANÁLISE ECONÔMICA DA PRODUÇÃO DE TILÁPIAS EM UMA PROPRIEDADE ASSOCIATIVISTA DE ILHA SOLTEIRA/SP
Provedor de dados: 31
Autores: Sabbag,   Omar Jorge.
O Brasil possui imenso potencial para o desenvolvimento da piscicultura, através de seus 5,5 milhões de hectares de reservatórios de águas doces, sendo que a criação de tilápias (Oreochromis niloticus) em sistemas de tanques-rede instalados em grandes reservatórios, é merecedora de destaque. O presente trabalho objetiva avaliar o custo de produção e a rentabilidade do cultivo de tilápia em tanques-rede de 18 m3, para uma associação de piscicultores (APROAQUA), no Município de Ilha Solteira/SP, tendo por base um estudo de caso para um ciclo produtivo de 180 dias em 0,5 ha, com 60 tanques-rede e produtividade de 68.000 Kg/ciclo. As estimativas de investimento e custos de produção foram baseadas no Custo Operacional Total utilizada pelo Instituto de Economia...
Tipo: Conference Paper or Presentation
Palavras-chave: Piscicultura; Custos de produção; Rentabilidade; Fish farming; Production costs; Profitability; Livestock Production/Industries.
Ano: 2008
URL: http://purl.umn.edu/114171

Bioeconomic Analysis of Aquaculture's Impact on Wild Stocks and Biodiversity
Provedor de dados: 31
Autores: Tisdell,   Clement A.
Anderson theorizes that development of the aquaculture of a species of fish (also captured in an open-access fishery) favours the conservation of its wild stocks, if competitive market conditions prevail. However, this theory is shown to be subject to significant limitations. While this is less so within his model, it is particularly so in an extended one outlined here. The extended model allows for the possibility that aquaculture development can impact negatively on wild stocks thereby shifting the supply curve of the capture fishery, or raise the demand for the fish species subject both to aquaculture and capture. Such development can threaten wild stocks and their biodiversity. While aquaculture development could in principle have no impact on the...
Tipo: Working or Discussion Paper
Palavras-chave: Aquaculture development; Aquatic conservation; Biodiversity; Common-property; Fish farming; Open-access fishery; Environmental Economics and Policy.
Ano: 2002
URL: http://purl.umn.edu/48739

Developing effective institutions for water resources management:  A case study in the Deduru Oya Basin, Sri Lanka
Provedor de dados: 31
Autores: Somaratne,   Pallewatte G.; Jinapala,   Kiribandage; Perera,   L.R.; Ariyaratne,   Badugodahewa Ranjith; Bandaragoda,   Don Jayatissa; Makin,   I.W.
Tipo: Working or Discussion Paper
Palavras-chave: River basins; Water resource management; Water lifting; Wells; Domestic water; Population; Economic aspects; Income; Irrigation programs; Institutions; Policy; Groundwater; Agricultural development; Fish farming; Pumps; Ecology; Water supply; Drought; Poverty; Land use; Water scarcity; Natural resources; Agricultural production; Cropping systems; Agricultural and Food Policy; Agricultural Finance; Consumer/Household Economics; Crop Production/Industries; Food Security and Poverty; Institutional and Behavioral Economics; Land Economics/Use; Political Economy; Production Economics; Public Economics; Resource /Energy Economics and Policy.
Ano: 2003
URL: http://purl.umn.edu/92665

Aspects of production in fish farming in Ilha Solteira, Sao Paulo state: viability of developing of public policies
Provedor de dados: 31
Autores: Sabbag,   Omar Jorge; Lima Costa,   Silvia Maria Almeida; Silveira,   Alexandre Ninhaus.
Just follow the poster to be presented at IAAE 2012.
Tipo: Presentation
Palavras-chave: Fish farming; Diagnostic analysis; Regional development.; Agribusiness; Agricultural and Food Policy; Community/Rural/Urban Development.
Ano: 2012
URL: http://purl.umn.edu/123218

Stewardship and Risk: An Empirically Grounded Theory of Organic Fish Farming in Scotland
Provedor de dados: 31
Autores: Georgakopoulos,   Georgios; Ciancanelli,   Penelope; Coulson,   Andrea; Kaldis,   Panayiotis.
It has long been assumed ownership gives farmers incentives to act as stewards for the land. On this basis, quasi-property rights are granted to fish farmers to encourage them to manage risks to the aquatic environment.  This paper offers an empirically grounded theorization of fish farmers’ perspectives on these issues. Data were gathered via field research with Scottish salmon farmers who had switched from conventional to organic fish farmers’ risk management strategies offer little support for the view that property rights automatically create incentives for stewardship of the marine environment.
Tipo: Journal Article
Palavras-chave: Risk; Organic; Fish farming; Grounded theory; Agricultural and Food Policy.
Ano: 2008
URL: http://purl.umn.edu/101053

Escapes of non-native fish from flooded aquaculture facilities: the case of Paranapanema River, southern Brazil
Provedor de dados: 103
Autores: Casimiro,Armando César Rodrigues; Garcia,Diego Azevedo Zoccal; Vidotto-Magnoni,Ana Paula; Britton,John Robert; Agostinho,Ângelo Antônio; Almeida,Fernanda Simões de; Orsi,Mário Luís.
ABSTRACT Non-native species are a major driver of biodiversity loss. Aquaculture activities play a key role in introductions, including the escape of fishes from fish farm facilities. Here, the impact of flooding due to El Niño rains in 2015/2016 in the Lower and Middle Paranapanema River basin, southern Brazil, was investigated by evaluating fish escapes from 12 fish farms. The flooding resulted in the escape of approximately 1.14 million fishes into the river, encompassing 21 species and three hybrids. Non-native species were the most abundant escapees, especially Oreochromis niloticus (Linnaeus, 1758) and Coptodon rendalli (Boulenger, 1897) (96% of all fish). Only seven native fishes were in the escapee fauna, comprising 1% of all fish. Large floods,...
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Biological invasion; Climate change; Fish farming; Paraná River; Propagule pressure.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702018000100504

Stress in pacu exposed to ammonia in water
Provedor de dados: 96
Autores: Abreu,Janessa Sampaio de; Esteves,Fábio Resende; Urbinati,Elisabeth Criscuolo.
The present study evaluated stress indicators in pacu exposed to ammonia in water under the following conditions: without NH4Cl (0.00 g/L); with 0.0078 g NH4Cl/L; and with 0.078 g NH4Cl/L (pH 8.3 and 27 ºC). After the salt dilution the water flow was interrupted and reestablished in 24 hours. Sampling occurred prior to the addition of NH4Cl (control) and after 12, 24 and 48 hours. Glycaemia increased only in fish with the highest salt concentration when compared with group control, regardless of time, and at 24 hours, regardless of treatment. Plasma ammonia, highest in fish exposed to the highest NH4Cl concentration, decreased progressively up to 48 hours. Plasma chloride only decreased in fish not exposed to salt when compared with control and osmolality...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cortisol; Fish farming; Fish physiology; Piaractus mesopotamicus; Plasmatic ammonia; Water quality.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000700001

Multivariate analysis using morphometric and ultrasound information for selection of tilapia (Oreochromis niloticus) breeders
Provedor de dados: 96
Autores: Oliveira,Sheila Nogueira de; Ribeiro,Ricardo Pereira; Oliveira,Carlos Antonio Lopes de; Lopera-Barrero,Nelson Mauricio; Borquis,Rusbel Raul Aspilcueta; Zardin,Aline Mayra da Silva Oliveira; Souza,Felipe Pinheiro de; Poveda-Parra,Angela Rocio.
ABSTRACT This study evaluated morphometric and ultrasound information of tilapia (O. niloticus) breeders through multivariate analysis. We applied correlation, clustering, and principal component analysis to a dataset composed of information from 222 male and female breeders of the improved GIFT strain. The body weight, objective of the breeding program, showed a high positive correlation with most of the morphometric parameters. The formation of clusters indicated characteristics responsible for muscle composition and carcass weight. Some characteristics showed a high correlation, such as body weight and fillet weight (0.98 and 0.94 for females and males, respectively), and a high contribution to the explanation of data variability; of the total...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture; Breeding; Fish farming; Oreochromis sp.; Phenotypic selection.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100151

The culture of Nile tilapia at different salinities using a biofloc system
Provedor de dados: 124
Autores: Souza,Rafael Liano de; Lima,Eduardo Cesar Rodrigues de; Melo,Fabiana Penalva de; Ferreira,Maria Gabriela Padilha; Correia,Eudes de Souza.
ABSTRACT The influence of water salinity on the culture of Nile tilapia with biofloc was evaluated using indicators of water quality, zootechnical performance and animal welfare. Five treatments of different salinities were adopted (0, 4, 8, 12 and 16 g L-1) with three replications. The tilapia were cultured for 90 days and stocked in glass fiber tanks (800 L) at a density of 30 fish m-3 with a mean initial weight of 93.8 ± 0.89 g. Water temperature, chlorophyll-a, sedimentable solids and total suspended solids showed no difference between salinities (p&gt;0.05). The levels of total ammonia nitrogen (3.94 mg L-1) and nitrite nitrogen (0.82 mg L-1) were lower at the salinity of 0 g L-1 compared to the highest salinity (16 g L-1) (p≤0.05). The final weight...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish farming; Brackish water; Microbial floc; Oreochromis niloticus.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000200267

Economic viability of the piauçu Leporinus macrocephalus (Garavello &amp;amp; Britski, 1988) production
Provedor de dados: 63
Autores: Takahashi,Leonardo Susumu; Gonçalves,Flavio Daolio; Abreu,Janessa Sampaio de; Martins,Maria Inez Espagnoli Geraldo; Ferreira,Antonio Carlos Manduca.
Brazilian fish farms presented an accelerated development during the early 90's, mainly because of the increase in fee-fishing operations. To meet the demand of this market, fish production and supply became excessive and, as a consequence, the number of fee-fishing operations, farmers and the final selling price, decreased. This study analyzes the technical aspects, production cost, profitability and economic viability of the production of piauçu (L. macrocephalus) in ponds, based on information from a rural property. Feeding and fingerling costs amount to approximately 47.1% of the total production cost, representing together with the final selling price the most important factor affecting profitability. The payback period was 8.3 years, the liquid...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Costs; Profitability; Economic analysis; Sensitivity analyses; Fish farming.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000200017

Parasites in farmed Piaractus brachypomus (Serrasalmidae) in the state of Acre, western Brazilian Amazonia
Provedor de dados: 36
Autores: NEGREIROS,Luciano Pereira; TAVARES-DIAS,Marcos.
ABSTRACT This study investigated the parasite fauna in Piaractus brachypomus grown in fish farms in the state of Acre, in the western Brazilian Amazon. We examined 160 fish from four farms. Overall parasite prevalence was 66.9%. The fish were parasitized by Anacanthorus spathulatus, Mymarothecium viatorum, Anacanthorus penilabiatus, Clinostomum marginatum, Echinorhynchus jucundus and Henneguya sp., but monogenean species were the dominant parasites. Monogeneans showed an aggregated distribution pattern and there was a weak correlation between host size and abundance of M. viatorum and A. penilabiatus. No difference in the condition factor of parasitized and non-parasitized fish was detected. The fish of all farms had the gills parasitized by A. spathulatus...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish farming; Monogenea; Endoparasites; Pirapitinga.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000400294

Performance and economic viability of tambaqui, Colossoma macropomum, selectively bred for weight gain
Provedor de dados: 36
Autores: SILVA,Ana Carla Carvalho; BARROS,Adriana Fernandes de; MENDONÇA,Flávia Maria Fernandes; GAMA,Kamyla Fernanda da Silva; MARCOS,Rebeca; POVH,Jayme Aparecido; FORNARI,Darci Carlos; HOSHIBA,Márcio Aquio; ABREU,Janessa Sampaio de.
ABSTRACT Tambaqui, Colossoma macropomum, is one of the most produced species in Brazilian fish farming, which has boosted the development of new technologies to increase its productivity. The aim of this study was to evaluate production performance in two second-generation tambaqui stocks selectively bred for weight gain in a semi-intensive rearing system and assess its influence on total production cost. We analyzed 300 fish (initial mean weight and standard length of 160 g and 17 cm, respectively) of two families (A and B, 150 fish each). The fish were individually marked with microchips and stocked in an 800-m2 excavated pond. For economic analysis, the obtained performance data were extrapolated for a fish farm with a 10-ha pond, adopting the Total...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture productivity; Breeding; Fish farming; Production cost; Native Brazilian fish.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000200108

Food deprivation does not affect growth performance of juvenile tambacu
Provedor de dados: 36
Autores: PAZ,Arlan de Lima; PASTRANA,Yugo Moraes; BRANDÃO,Lian Valente.
ABSTRACT The objective of this study was to evaluate the efficiency of food deprivation on the growth performance of the commercially important hybrid fish tambacu (Piaractus mesopotamicus male × Colossoma macropomum female). For this, 171 juveniles of average length 8 cm and 11.4 g body mass were distributed in nine tanks, and allocated to three treatments: the fish were fed every day (control), fed for six days followed by one day of food deprivation (6F/1D) and fed for five days followed by two days of food deprivation (5F/2D). After 77 days, all animals achieved similar growth rates. Only animals submitted to two days of food deprivation presented hyperphagia. There was a reduction in total feed consumption of 3.8% and 10.8% for the 6F/1D and 5F/2D...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Fish farming; Feeding strategy; Compensatory growth.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672018000300207

Economic feasibility of probiotic use in the diet of Nile tilapia, Oreochromis niloticus, during the reproductive period
Provedor de dados: 2
Autores: Dias, Danielle de Carla; Furlaneto, Fernanda de Paiva Badiz; Sussel, Fábio Rosa; Tachibana, Leonardo; Gonçalves, Giovani Sampaio; Ishikawa, Carlos Massatoshi; Natori, Mariene Miyoko; Ranzani-Paiva, Maria José Tavares.
This work examines the economic advantages of probiotic use in the diet of Nile tilapia broodstock during the reproductive period. For this purpose, Bacillus subtilis was applied as a feed additive. The experimental design was completely randomized with three treatment groups: the T0 control (without probiotic), the T1 continuous probiotic intake, and the T2 alternate probiotic intake at a dose of 0.50 g kg-1 of feed (1010 CFU g-1) with four replicates. For the reproduction assay, 118 females and 48 males of Nile tilapia (proportion 4 males:9 females. hapa-1) (weight 527.65 g ± 185.98 g and length 30.16 cm ± 3.57 cm) were distributed into 12 hapas (3.5 × 2.0 × 1.5 m). Reproductive variables (spawning female percentage, egg production, and fry production)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacillus subtilis; Fish farming; Feed additive; Profitability; Spawning.
Ano: 2020
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/47960

Benzocaine and eugenol as anesthetics for Brycon hilarii - doi: 10.4025/actascianimsci.v35i2.16644
Provedor de dados: 2
Autores: Fabiani, Bruno Matucita; Universidade Estadual do Oeste do Paraná - Unioeste; Boscolo, Wilson Rogério; Universidade Estadual do Oeste do Paraná - Unioeste; Feiden, Aldi; Universidade Estadual do Oeste do Paraná - Unioeste; Diemer, Odair; Universidade Estadual Paulista “Júlio de Mesquita Filho” - UNESP; Bittencourt, Fábio; Universidade Estadual Paulista - UNESP; Neu, Dacley Hertes; Universidade Estadual de Maringá - UEM.
Anesthetic products are frequently employed during fish handling practices; however, the correct doses of the various chemicals for different species are still unknown. This study determined the ideal concentrations of benzocaine and eugenol as anesthetics used in Brycon hilarii juveniles. The fish were acquired from a commercial fish farm located in western Paraná state, Brazil, totaling 104 juveniles, with average body weight and length of 50.04 ± 20.80 g and 16.30 ± 12.32 cm respectively. The study was carried out at the Aquiculture Laboratory from the Aquaculture Management Study Group - GEMAq at the West Parana  State University. Five benzocaine concentrations (50.0, 100.0, 150.0, 200.0 and 250.0 mg L-1) and seven eugenol concentrations (50.0, 100.0,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 5.06.04.00-7 anesthesia; Light sedation; Handling; Native fish; Fish farming; Lethargy Anesthesia; Light sedation; Handling; Native fish; Fish farming; Lethargy.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/16644

Dermocystidium sp. in the gills of farmed Oreochromis niloticus in Brazil
Provedor de dados: 42
Autores: STECKERT,LILIAN D.; CARDOSO,LUCAS; TANCREDO,KAREN R.; MARTINS,MAURÍCIO L.; JERÔNIMO,GABRIELA T.
Abstract: The genus Dermocystidium is very comprehensive in the host and site of infection, however this is the first report of the occurrence of Dermocystidium sp. in the gills of Nile tilapia. This study was carried out in a fish farming located in the state of Santa Catarina, Brazil. No mortalities were reported in the facility studied and the animals were clinically healthy. During the histopathological analysis of the gills, 8.33% of the fish presented spores of Dermocystidium sp. in the gill tissue. The spores reported herein had a mean length and width of 6.206 x 5.233 μm and a refractile body diameter of 1.965 μm and were studied by histopathology and Transmission Electron Microscopy. This study highlights the importance of a new branchial pathogen...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish farming; Dermatocystidiosis; Nile tilapia; Histology; Electron microscopy; Spores.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000500865

Physiological response and performance of tambaqui fed with diets supplemented with Amazonian nut
Provedor de dados: 65
Autores: Santos,Marcio Quara de Carvalho; Oishi,César Augusto; Pereira Filho,Manoel; Lima,Mariana do Amaral Camara; Ono,Eduardo Akifumi; Affonso,Elizabeth Gusmão.
The present study evaluated the effectiveness of Amazonian nut (Bertholletia excelsa) as an alternative source of vegetal protein in tambaqui (Colossoma macropomum) diet. Performance and physiological status of fish fed for 60 days were evaluated. Four experimental isonitrogenous diets with 36% crude protein were formulated with increasing levels of nut meal (0, 10, 20 and 30%). Results showed the same growth performance for fish fed with diet with different levels of Amazonian nut than that without this ingredient (control). Analysis of physiological parameters (hematocrit, erythrocyte number, hemoglobin concentration, hematimetric indexes, total plasma protein and plasma glucose) corroborate these results, with no significant differences among...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bertholletia excelsa; Colossoma macropomum; Physiological stress; Regional ingredient; Nutrition; Fish farming.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782010001000021

Performance of juvenile mojarra supplied with feed containing varying levels of crude protein
Provedor de dados: 64
Autores: Souza,Ricardo Henrique Bastos de; Magalhães Júnior,Francisco Oliveira de; Cipriano,Filipe dos Santos; Lima,Kauana Santos; Takishita,Sylvia Sanae; Braga,Luís Gustavo Tavares.
ABSTRACT The growth of the Brazilian aquaculture has stimulated the development of the productive chain of native species, including marine environment. The objective of this study was to evaluate the growth performance of juvenile mojarra fish (Diapterus rhombeus) fed diets containing different concentrations of crude protein (32, 36, 40 and 44 g 100 g-1). The 80 juvenile mojarra (7.2±1.5 g) were kept in 16 circular tanks (150 L). The study design used was completely randomized with four treatments and four repetitions. The fish were fed four times a day. At the end of the experiment (60 days) the final weight, feed intake, weight gain (WG), feed:gain ratio (FGR), protein efficiency rate (PER), energy efficiency rate, specific growth, survival rate and,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish farming; Fish nutrition; Mariculture; Marine environment; Diapterus rhombeus.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542016000200217