SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Fitz,Raquel C.; Rodenbusch,Cesar A.; Dala-Corte,Renato B.; Azevedo,Marco A..

ABSTRACT Life history traits of Characidium pterostictum Gomes, 1947 (Characiformes, Crenuchidae) from three different reaches of the upper Sinos river, southern Brazil, were described and comparatively analyzed according to the longitudinal gradient. For all reaches, results indicated a seasonal reproductive strategy with a higher intensity during warmer months of higher photoperiod (November to February). Only females were found in the upstream reach and they were more numerous than males in all the sampled reaches. Mean absolute fecundity ranged from 5189 (±2131 SD) to 7394 (±3807 SD), whereas mean relative fecundity (oocytes per mg of female total weight) ranged from 1.08 (±0.40 SD) to 1.12 (±0.29 SD). Oocyte development was characterized as synchronic...

Differences on allocation of available resources, in growth, reproduction, and survival, in an exotic gastropod of Physidae compared to an endemic one

Palavras-chave: Fishes; Reproductive period; Size at first maturation; Fecundity; Body size.

Ano: 2017

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212017000100202

Núñez,Verónica.

Physa acuta Draparnaud, 1805 is an invasive gastropod that can affect local species. In Argentina, it is widespread and abundant, even in environments inhabited by the native species Stenophysa marmorata Guilding, 1828. Its predominance raises the question whether this could be explained by a more successful energy allocation in functional requirements (growth, reproduction and survival) compared to S. marmorata. This study was aimed at comparing growth rates, as well as survival and fecundity, between both species under laboratory conditions. Individuals born on the same day were grouped in four per aquaria and kept under controlled conditions of food, light, and temperature. Snails were weekly measured (maximum shell length), and growth rates were...

Reproductive traits of Gymnogeophagus labiatus (Teleostei, Cichlidae), in an upper stretch of Sinos river, Caraá, Brazil

Palavras-chave: Fecundity; Invasive species; Longevity; Physa acuta; Stenophysa marmorata.

Ano: 2010

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212010000300014

Verba,Júlia T.; Lampert,Vinicius R.; Azevedo,Marco A..

This work describes the reproduction of Gymnogeophagus labiatus (Hensel, 1870) from an upper stretch of Sinos river, southern Brazil, based on the analysis of 174 males and 132 females captured in monthly samples taken from January to December 2007. Results showed that reproductive activity occur in spring and summer although ripe males were found along the year. The standard length of the smallest ripe male was 104.74 mm (Lt) and the smallest ripe female was 55.00 mm (Lt). There was a significant difference in total sex ratio, with 1.32 males to each female (χ2 = 5.76). Males were much more abundant in March (1.75 males: 1 female) and December (5 males: 1 female). Females were more abundant in the 62├77 mm interval (1 male: 2.36 female) while males were...

Reproductive characteristics of characid fish species (Teleostei, Characiformes) and their relationship with body size and phylogeny

Palavras-chave: Cichlid; Neotropical; Reproduction; Fecundity; Oocyte development.

Ano: 2011

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212011000200007

Azevedo,Marco A..

In this study, I investigated the reproductive biology of fish species from the family Characidae of the order Characiformes. I also investigated the relationship between reproductive biology and body weight and interpreted this relationship in a phylogenetic context. The results of the present study contribute to the understanding of the evolution of the reproductive strategies present in the species of this family. Most larger characid species and other characiforms exhibit a reproductive pattern that is generally characterized by a short seasonal reproductive period that lasts one to three months, between September and April. This is accompanied by total spawning, an extremely high fecundity, and, in many species, a reproductive migration. Many species...

Population and reproductive features of the western Atlantic hermit crab Pagurus criniticornis (Anomura, Paguridae) from Anchieta Island, southeastern Brazil

Palavras-chave: Neotropical; Reproductive period; Seasonality; Fecundity; Type of spawning; Mode of reproduction; Insemination.

Ano: 2010

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212010000400020

Mantelatto,Fernando L.; Faria,Fabíola C. R.; Iossi,Carmen L.; Biagi,Renata.

The population of the hermit crab Pagurus criniticornis (Dana, 1852) was studied based on seasonal abundance, size frequency distribution, sex ratio, reproductive period, fecundity and shell relationship. Specimens were collected monthly by SCUBA diving in the infralittoral area of Anchieta Island, Ubatuba. A total of 1,017 individuals was analyzed. Animal size (minimum and maximum shield length, respectively) was 0.7 and 2.9 mm for males, 0.6 and 2.8 mm for non-ovigerous females, and 1.0 and 2.5 mm for ovigerous females. The sex ratio was 1:1.29. Sexual dimorphism was recorded by the presence of males in the largest size classes. Ovigerous females were captured during all months along the year, with percentages varying from 8% (July) to 84.3% (February)...

Reproductive biology of the sesarmid crab Armases rubripes (Decapoda, Brachyura) from an estuarine area of the Sahy River, Sepetiba Bay, Rio de Janeiro, Brazil

Palavras-chave: Crustacea; Hermit crab; Populational biology; Fecundity.

Ano: 2007

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212007000300016

Lima,Giovana V.; Soares,Marcelo R. S.; Oshiro,Lídia M.Y..

The aim of this work was to gain knowledge about reproductive biology of the crab Armases rubripes (Rathbun, 1897) from an estuarine area of the Sepetiba Bay. Samples were taken monthly from February 2003 to January 2004 in the Sahy River estuary (22º56'S; 44º01'W), Rio de Janeiro, Brazil. The crabs were collected by hand during 15-minute catch-effort sessions conducted by two people. In the laboratory, the specimens were separated by sex, carapace width was measured and gonadal stage was checked macroscopically. A total of 830 individuals were caught - 304 males, 373 females (60 ovigerous females) and 153 juveniles. The ovigerous females were found almost year-round, except in November and April, showing a continuous reproductive period. They presented a...

Spatial distribution and egg production in squat lobsters (Decapoda: Munididae, Munidopsidae) from the collection of the Museu de Zoologia of the Universidade de São Paulo, Brazil

Palavras-chave: Crab; Sesarmidae; Fecundity; Reproduction; Sexual maturity.

Ano: 2006

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212006000100007

Hernáez,Patricio.

ABSTRACT: Spatial distribution and egg production of squat lobsters is examined from specimens deposited in the collection of the Museu de Zoologia of the Universidade de São Paulo (MZUSP), Brazil. A total of 1,346 specimens of squat lobsters were analyzed, out of which 169 were ovigerous females. Ovigerous females contained ten species of Munididae (n = 165) and three of Munidopsidae (n = 4). Eleven of the thirteen studied species were distributed along the Brazilian coast, while two of the remaining species in other marine regions. The analysis of bathymetric distribution revealed the presence of four species on the continental shelf (< 200 m depth: M. spinifrons, M. pusilla, M. irrasa, M. flinti), two on the first layer of the continental slope...

Population dynamic of Sesarma rectum (Crustacea, Brachyura, Sesarmidae) from a muddy flat under human impact, Paraty, Rio de Janeiro, Brazil

Palavras-chave: Fecundity; Egg size; Crustacea; South Western Atlantic.

Ano: 2018

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212018000100220

Silva,Stella Maris Januário da; Hirose,Gustavo Luis; Negreiros-Fransozo,Maria Lucia.

A population of Sesarma rectum Randall, 1840 under the influence of human impact was studied. Monthly sampling (CPUE, two people during 30 min) took place from August/2001 to July/2002 at an impacted muddy flat in Paraty city, State of Rio de Janeiro (23º13'S, 44º42'W). At the laboratory, specimens were classified by sex and measured with a vernier caliper (0.01 mm). The size at the beginning of the sexual maturity was obtained by means of different techniques: in the case of males it was used the allometric procedure and the macroscopic analysis of gonads wile for females, the size of the smallest ovigerous female was also considered. The population structure was evaluated by means the analysis of the variations in the modes of the size frequency...

Reproductive strategy of a non-annual rivulid in a perennial wetland

Palavras-chave: Sexual maturity; Allometric growth; Population structure; Fecundity.

Ano: 2007

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212007000200010

Cavalheiro,Laísa W.; Fialho,Clarice B..

ABSTRACT Atlantirivulus riograndensis (Costa & Lanés, 2009) is a fish registered to the basin of Patos lagoon and the adjacent coastal plains in southern states of Rio Grande do Sul and Santa Catarina, Brazil, found in shallow water courses with that have large quantities of aquatic vegetation and forest edges. The objective of this study was to investigate the reproductive strategy and tactics of this species including the sex ratio, the length at first maturity, spawning type, fecundity and the possible associations among reproduction and abiotic factors. Sampling of specimens occurred in perennial wetlands within the Banhado dos Pachecos wildlife refuge, in the city of Viamão, state of Rio Grande do Sul, Brazil, which is a conservation unit that...

Compréhension des différences de distribution spatiale des anchois et de leurs œufs

Palavras-chave: Atlantirivulus riograndensis; Gonadal development; Multiple spawning; Fecundity.

Ano: 2015

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212015000300288

The anti-fecundity effect of 5-azacytidine (5-AzaC) on Schistosoma mansoni is linked to dis-regulated transcription, translation and stem cell activities

Godet, Claire.

La campagne PELGAS participe à la gestion du stock d’anchois du Golfe de Gascogne, en réalisant une évaluation directe à la mer de la biomasse d’anchois. Pour déterminer la biomasse totale, des appareils acoustiques envoyant des ultra-sons dans l’eau pour détecter les bancs de poisson sont utilisés. Ensuite des pêches sont effectuées sur les zones détectées pour déterminer la composition des bancs (espèces, poids, longueurs…). En parallèle, les oeufs d’anchois sont comptés. A partir des données récoltées de 2000 à 2015, j’ai pu réaliser des cartes de distribution spatiale des anchois et de leurs oeufs, ainsi que des analyses statistiques afin de comprendre les différences de distribution entre les deux. Il s’avère que les oeufs sont plus au large que les...

Tipo: Text

Palavras-chave: Anchois; Fécondité; Répartition; Golfe de Gascogne; Oeufs.; Anchovies; Fecundity; Repartition; Bay of Biscay; Eggs..

Ano: 2016

URL: http://archimer.ifremer.fr/doc/00342/45335/44797.pdf

The culture of Hoplosternum littorale : State of the art and perspectives

Geyer, Kathrin K.; Munshi, Sabrina E.; Vickers, Martin; Squance, Michael; Wilkinson, Toby J.; Berrar, Daniel; Chaparro, Cristian; Swain, Martin T.; Hoffmann, Karl F..

Uncontrolled host immunological reactions directed against tissue-trapped eggs precipitate a potentially lethal, pathological cascade responsible for schistosomiasis. Blocking schistosome egg production, therefore, presents a strategy for simultaneously reducing immunopathology as well as limiting disease transmission in endemic or emerging areas. We recently demonstrated that the ribonucleoside analogue 5-azacytidine (5-AzaC) inhibited Schistosoma mansoni oviposition, egg maturation and ovarian development. While these anti-fecundity effects were associated with a loss of DNA methylation, other molecular processes affected by 5-AzaC were not examined at the time. By comparing the transcriptomes of 5-AzaC-treated females to controls, we provide evidence...

Tipo: Text

Palavras-chave: Schistosoma mansoni; Epigenetics; 5-Azacytidine; Fecundity; RNA-Seq; Protein synthesis; Stem cells.

Ano: 2018

URL: https://archimer.ifremer.fr/doc/00615/72703/71747.pdf

Reproduction and growth of the deep-sea brittlestar ophiura-ljungmani (lyman)

Luquet, P; Boujard, Thierry; Planquette, P; Moreau, Y; Hostache, G.

Hoplosternum littorale is a siluriform fish of very high commercial value in some countries of South America. Some biological characteristics as easy spawning in confinement and good tolerance of low oxygen level make it easy to cultivate.

Tipo: Text

Palavras-chave: Fish ponds; Incubation; Brood stocks; Circadian rhythms; Sexual maturity; Sex ratio; Rearing; Respiration; Survival; Diets; Larvae; Fecundity; Hatching; Oxygen; Feeding behaviour; Fish culture.

Ano: 1989

URL: http://archimer.ifremer.fr/doc/1989/acte-1491.pdf

Donnees cytologiques, electrophysiologiques et biochimiques relatives au phenomene de fecondation chez le homard (Homarus gammarus ). Implication du processus d'activation sur le mecanisme d'attache des oeufs pondus

Tyler, Pa; Gage, Jd.

Reproductive biology and population dynamics of Ophiura Ijungmani were studied by measuring disk diameters and by examining oocyte size-frequencies and fecundity from a sequential seasonal series of large samples from a 2900 m deep Permanent Station in the Rockall Trough (Northeast Atlantic). Egg size (max. 90 !lm) and fecundity (up to 57000 eggs per individual) suggests indirect planktotrophic development, while a clear annual cycle in gametogenesis, with probably synchronous spawning in JanuaryFebruary, confirms a marked seasonality that is also seen as an annual, summertime set of postlarvae on to the bottom. Analysis of size structure of the population indicates annually discrete year classes with a maximum longevitv of around 10 years. lndividuals...

Tipo: Text

Palavras-chave: Ovocytes; Fécondité; Structure de la répartition des classes de tailles; Recrutement; Capacité de survie; Oocytes; Fecundity; Population structure; Recruitment; Survivorship.

Ano: 1980

URL: http://archimer.ifremer.fr/doc/00323/43424/43087.pdf

Fécondité de Nephrops norvegicus dans le golfe de Gascogne

Goudeau, M; Lachaise, F; Kubisz, P; Goudeau, H.

Electrophysiological measurements and related cytological controls were done on immature and submature oocytes of Homarus gammarus . By chromatography (HPLC) and radio-immunoassays (RIA) it was established that submature oocytes displayed different ecdysteroids. Furthermore, the structure of the stalk (funiculus) for the laid eggs attachment was analyzed. it consisted of the two superimposed vitelline envelopes which were likely modified by the cortical reaction exudate during the fertilization process. In addition, the successive secretory phases, regarding to the embryonic envelopes were evidenced. Finally, the ecdysteroid titers of embryonic stages were measured.

Tipo: Text

Palavras-chave: Homarus gammarus; Malacostraca; Biological attachment; Hormones; Electrophysiology; Biochemistry; Cytology; Eggs; Embryonic development; Cell membranes; Oocytes; Fecundity; Homard; Decapode; Crustacé; Funicule; Mues embryonnaires; Enveloppe de fécondation; Ecdystéroîdes; Potentiel membranaire; Ovocyte.

Ano: 1983

URL: http://archimer.ifremer.fr/doc/1983/acte-1190.pdf

Peculiarities of reproduction and generative production of tropical copepods

Morizur, Yvon; Conan, Gérard; Guenole, A.; Omnes, Marie-helene.

Females of the Norway lobster Nephrops norvegicus (L.) incubate their eggs under the abdomen for a period of several months. The authors estimated the individual fecundity of N. norvegicus (1) before spawning, and (2) at the end of the incubation period. From these two relationships, they then calculated the average egg loss. Egg loss seems to be relatively higher for small females than for large ones. The mean egg loss estimated for the Bay of Biscay (45%) differs from the only other existing value (75%) calculated by other authors for Portuguese waters. Egg loss may regulate stock-density, and may be a mechanism intervening in stock-recruitment.

Tipo: Text

Palavras-chave: Nephrops norvegicus; Crustacea; Decapoda; Nephrops; Incubation; Spawning; Sexual reproduction; Fecundity.

Ano: 1981

URL: http://archimer.ifremer.fr/doc/1981/publication-2348.pdf

Characteristics of one sea winter Atlantic salmon stock caught on Elorn river from 1974 to 1984

Sazhina, L.

The aim of the present investigation consisted in revealing the regular natural changes of fecundity in mass pelagic copepods of the World Ocean tropical zone. Particular emphasis was placed on determination of the clutch size, duration of development, rate of generative production formation at both organism and population levels, and connection of these processes with environmental conditions. The major difficulty lay in the fact that most mass species of tropical copepods are laying eggs immediately into water thus complicating the determination of quantitative characteristics of reproduction.

Tipo: Text

Palavras-chave: Copepoda; Pelagic environment; Clutch; Environmental factors; Population density; Tropical environment; Fecundity; Biological production; Reproductive cycle.

Ano: 1984

URL: http://archimer.ifremer.fr/doc/1984/acte-1525.pdf

Prouzet, Patrick; Gaignon, Jean-louis.

From observations gathered on grilse populations sampled during the fishing period (March -mid-June) or after the fishing season, the authors noted: a strong heterogeneity and length, the mean value of which increase from May to December, a sex-ratio not different from 1 male for 1 female, a high relative fecundity superior to those of spring salmon population sampled. The comparison between fish of local and foreign origins did not allow to observe significant differences between the biological characteristics studied (weight, length, sex-ratio and fecundity).

Tipo: Text

Palavras-chave: Salmo salar; Salmonidae; Pisces; Weight; Fecundity; Sex ratio; Length weight relationships; Migratory species.

Ano: 1983

URL: http://archimer.ifremer.fr/doc/1983/publication-1818.pdf

Fecundity, growth rate and survivorship at the interface between two contiguous genetically distinct groups of Semibalanus balanoides