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Registros recuperados: 3
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Reproductive aspects of Macrobrachium amazonicum (Decapoda: Palaemonidae) in the State of Amapá, Amazon River mouth Acta Amazonica
Lima,Jô de Farias; Silva,Luis Mauricio Abdon da; Silva,Thibério Carvalho da; Garcia,Jamile da Silva; Pereira,Ilana da Silva; Amaral,Karlia Dalla Santa.
Macrobrachium amazonicum is an indigenous prawn vastly distributed in basins of South America, widely exploited by artisanal fisheries in northern and northeastern Brazil and, with great potential for aquaculture. This study aimed to investigate general aspects of population structure and reproductive characteristics (size at first maturity, fecundity and reproductive output) of M. amazonicum from two important areas to artisanal prawn fishing located at the mouth of the Amazon River, State of Amapá. The specimens were captured using 20 handcrafted traps called "matapi". A number of 5,179 prawns were captured, 2,975 females and 2,195 males resulting in 1.35:1 female to male ratio. Santana Island and Mazagão Velho showed females predominated in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Palaemonid eggs; First maturation; Fecundity; Morphometric relationships; Reproduction.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672014000200010
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Reproductive biology of Menticirrhus littoralis in southern Brazil (Actinopterygii: Perciformes: Sciaenidae) Neotropical Ichthyology
Braun,Aloisio Sirangelo; Fontoura,Nelson Ferreira.
Menticirrhus littoralis is an important sport and commercial fish species in southern Brazil. This paper aims to analyze the reproductive biology of the species in Rio Grande do Sul coastal waters. Captures were carried out at Cidreira's fishing pier (30º 08' S; 50º 11' W) located on the Northern Coast of Rio Grande do Sul, where sport-fishing takes place throughout the year. Sport fishermen using hook-and-line with different hook sizes and varied baits exclusively made the captures. A total of 807 individuals were obtained from June 1997 to May 1998. Sexual proportion was 0.67 female for each male (323 females and 484 males; chi2c = 32.120; DF=1; P<0.001). The smallest individual (total length) for captured animals was a male of 13 cm whereas the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Reproduction; Rio Grande do Sul; First maturation; Gonadosomatic index.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252004000100005
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Reproductive biology of Rhaphiodon vulpinus (Ostariophysi: Cynodontidae) in the Tocantins River Basin, Brazil Neotropical Ichthyology
Neuberger,Andréa L.; Marques,Elineide E.; Agostinho,Carlos S.; Oliveira,Rafael J. de.
In order to evaluate aspects of the reproductive biology of Rhaphiodon vulpinus in the Upper and Middle Tocantins River, samples were taken monthly from October, 1999 through September, 2001, by means of gill nets. Males, which were more abundant than females (chi2 146.87: df=1: p<0.05), matured at a smaller size. The reproductive period of the species extended essentially from November through January, with a peak of activity in November. Fecundity, with an estimated mean value of 98,185 oocytes, varied from 38,177 to 215,841 oocytes, and it did not correlate with the length of the individual female analyzed (r=0.4663: p=0.206). Relative fecundity was 130.6 oocytes/g total weight. Mature oocytes had a mean diameter of 0.98 mm, corresponding to a volume...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sex ratio; First maturation; Reproduction; Fecundity.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000400007
Registros recuperados: 3
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