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| Registros recuperados: 15 | |
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| 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... |
| Tipo: Info:eu-repo/semantics/article |
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 |
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| Araújo,Marina de Sá Leitão C. de; Tenório,Deusinete de O.; Castiglioni,Daniela da S.. |
| The semi terrestrial crabs are important elements of the fauna of coastal regions. The aim of this study was to analyze the population structure of Armases angustipes (Dana, 1852) at estuaries of the Ariquindá River, considered a non impacted area, and Mamucabas River, considered a few impacted area, on the south coast of state of Pernambuco, Brazil. The species occurred in all months of the year. The number of individuals per month varied, being higher in the months of transition between the seasons. This is probably due to significant seasonal variations of air and burrow temperature and burrow salinity. There was no sexual dimorphism in size of A. angustipes in the mangrove of Ariquindá River, but males were larger than females in the mangrove of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Population dynamics; Reproductive period; Sesarmid. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212014000200004 |
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| Teixeira,Gabriel E.; Bialetzki,Andréa; Soares,Bruno E.; Souza,Guilherme; Caramaschi,Érica P.. |
| ABSTRACT The Paraíba do Sul River is affected by extensive water collection for supply, organic and industrial pollution, and dams. Nonetheless, the ichthyofauna maintains biodiversity and sustains artisanal fisheries. This study analyzes the composition, abundance and distribution of fish larvae, an important approach to determine the reproductive period and spawning sites. The sampling occurred from August 2011 through February 2013 in five sites at a transect between the banks on the lower reach of the Paraíba do Sul River. A total of 5,412 larvae belonging to 20 taxa was captured. The predominant order was Characiformes. Larvae of Prochilodus spp. and Leporinus spp. were the most abundant; larvae of Brycon insignis, an endangered species, were present.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Drought; Eggs and larvae; Migratory species; Reproductive period; Spawning area. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000500208 |
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| Oliveira,Elton Celton de; Favaro,Luís Fernando. |
| The present work studied the reproduction of the flatfish Etropus crossotus in the Paranaguá Estuarine Complex, Paraná State, subtropical region of Brazil. Monthly collections of biological material occurred from October 2008 to October 2009, at seven sampling sites, through ten-minute otter trawl surveys in the shallow infralittoral areas of the estuary. Temperature, water salinity, photoperiod, and rainfall data were also recorded. Ovarian histology was used to: 1 - describe ovarian development microscopically, 2 - make the quantitative analyses of both sexes more precise. The maturation curve, the frequency of gonadal maturation states and the condition factor verified that the reproductive period occurred from October to January. The frequency of young... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: First maturation length; Partially spawned; Recruitment; Reproductive period. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000400010 |
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| Oliveira,Elton C. de; Fávaro,Luís Fernando. |
| The present study characterizes the oogenesis and the ovarian maturation scale, and determines the reproductive period, type of spawning, recruitment period, and population variations in the reproductive process of the flatfish Achirus lineatus (Linnaeus, 1758). Specimens were sampled on a monthly basis in the shallow near shore area of the Paranaguá Bay, state of Paraná, Brazil, from March 2006 to February 2007. The specimens collected were measured for morphometric data (total length and total weight) and their gonads were exposed for macroscopic evaluation. The gonads were subsequently removed, weighed and processed for microscopic analyses. Six phases of the ovarian follicle development were defined, as well as five ovarian development stages. Growth... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oogenesis; Maturity scale; Reproductive period; Type of spawning; Sex ratio. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000400004 |
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| Lemos,Valéria M.; Varela Junior,Antônio S.; Velasco,Gonzalo; Vieira,João P.. |
| The Plata pompano, Trachinotus marginatus (Cuvier, 1832), is an endemic carangid of the Southwestern Atlantic Ocean, occurring from Rio de Janeiro to Uruguay. This study describes the reproductive period, spawning type, the size at first gonadal maturation and the length-weight relationship of individuals sampled from landings of the artisanal and commercial fishing fleets in Rio Grande that operate along the coast of Rio Grande do Sul state, southern Brazil (~ 32ºS) to the Uruguayan border (~ 34ºS). Monthly collections from September 2008 through January 2010 yielded 274 individuals ranging from 142 to 444 mm in total length (TL). The gonadal development stages were defined according to the histological examination of the ovaries and the testes. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Reproductive period; Sexual maturation; Spawning; Weight-length relationship. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000500008 |
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| Aranha,José Marcelo R.; Caramaschi,Érica P.; Caramaschi,Ulisses. |
| Patterns of spatial occupation, feeding, and reproductive period of two species, Corydoras aeneus and Corydoras gr. carlae (Siluroidei, Callichthyidae), coexistents in the Alambari River (Botucatu, São Paulo), were studied. High diet overlap, partial spatial segregation, and well differentiated reproductive strategies were verified. These findings do not permit to evidence the occurrence of competitive interactions between the analysed species. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Siluroidei; Callichthyidae; Spatial occupation; Feeding; Reproductive period. |
| Ano: 1993 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751993000300013 |
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| Bailly,Dayani; Batista-Silva,Valéria Flávia; Abelha,Milza Celi Fedatto; Kashiwaqui,Elaine Antoniassi Luiz; Fernandes,Carlos Alexandre; Carvalho,Edson Dias de. |
| This study aimed to evaluate population abundance patterns and the main events in the reproductive cycle of Loricariichthys platymetopon at Saraiva Lagoon, Ilha Grande National Park, MS-PR, Brazil. Monthly samplings were conducted from October 2004 to September 2005 in three sections of the lagoon: entrance, middle and end, which resulted in the capture of 175 individuals. Spatial and temporal variation in abundance was obtained through CPUE (number of captured individuals/1000 m² of gillnets in 12 hours). The reproductive tactics considered were: duration, time and location of spawning, oocyte diameter and fecundity. The highest relative abundance was recorded in February, in the middle section of the lagoon, and the reproductive period lasted from... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish; Distribution; Oocyte diameter; Fecundity; Reproductive period. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000300014 |
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| Biagiotto,Renan Hohendorff; Rondineli,Giulianna; Carmassi,Alberto Luciano; Braga,Francisco Manoel de Souza. |
| The aim of this work was to present the reproductive aspects of Harttia carvalhoi Miranda Ribeiro, 1939, a small loricariid whose distribution is restricted to the area of drainage basin of the Paraíba do Sul river. A total of 110 specimens of H. carvalhoi were captured. The reproductive period happens from September to February. A total spawning type was identified and fecundity rate ranged from 16 to 106 oocytes. This type of study is important, since fecundity is a specific feature and is adapted to the conditions of the life cycle, varying with growth, population density, food availability and mortality rate. We also emphasize the importance of this study, since there are no previous studies about the reproduction of this species. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Loricariinae; Sex ratio; Reproductive period; Fecundity; Brazil. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000400026 |
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| Registros recuperados: 15 | |
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