Growth and mortalities of the pink-shrimp Farfantepenaeus brasiliensis Latreille, 1970 and F. paulensis Pérez-Farfante 1967 in Southeast Brazil

Abstract

AbstrActfrom July, 1999 until July, 2001 data from the pink-shrimp Farfantepenaeus brasiliensis latreille, 1970 and F. paulensis Pérez-farfante, 1967 fishery were collected from trawling by the fishing fleet based in santos/Guarujá-sP. Growth and mortalities of these species were studied. F. brasiliensis and F. paulensis have longevity of 2 years and growth estimates of l∞ = 29.0 cm and k = 1.24 year -1 for F. brasiliensis and l∞ = 27.5 cm and k = 1.34 year -1 for F. paulensis. females reach bigger lengths than males in both species. natural mortalities (m) were 1.80 and 1.90 year -1 and fishing mortalities (f) were 4.7 and 6.8 year -1 for F. brasiliensis and F. paulensis, respectively. survival rates are s = 0.15% and 0.02% for F. brasiliensis and F. paulensis, respectively, which are usually low values for shrimps. Farafantepenaeus brasiliensis e F. paulensis são espécies de crescimento rápido e vida curta, com longevidade de 2 anos (l∞ = 29,0 cm e k = 1,24 ano -1 para F. brasiliensis; l∞ = 27,5 cm e k = 1,34 ano -1 para F. paulensis). As fêmeas atingem tamanhos maiores que os machos para ambas espécies. As mortalidades naturais foram estimadas em m = 1,80 ano -1 e 1,90 ano -1 e as mortalidades por pesca f = 4,7 ano -1 e 6,8 ano -1 para F. brasiliensis e F. paulensis, respectivamente. As taxas de sobrevivência foram calculadas em s = 0,15% para F. brasilensis e S = 0,02% para F. paulensis, valores usualmente baixos para camarões. KeywordsPalavras-chave: pescarias marinhas industriais tropicais, camarão-rosa, Farfantepenaeus, crescimento, mortalidades, Brasil. 524 leite Jr., n. o. and Petrere Jr., m.

Ten-year variations in population structure of pink-shrimp in a southwestern Atlantic Bay affected by highway construction

“…This pattern was found in populations of F. brasiliensis landed in the port of Santos (São Paulo) by Mello (1973) and Leite and Petrere (2006a) and in Lagoa da Conceição (BRANCO; VERANI, 1998a). However, for F. paulensis in Lagoa dos Patos it was positive (D' INCAO;CALAZANS, 1978) and in Lagoa da Conceição negative for both sexes (BRANCO;VERANI, 1998b).…”

“…However, for Branco and Verani (1998b) and Luchmann et al (2008), the autumn was responsible for the largest abundances of F. paulensis in the neighborhood of Lagoa da Conceição, indicating a strategy of temporal separation between the two species in these environments. CALAZANS, 1978;VILLELA et al, 1997;BRANCO;VERANI, 1998aVERANI, , 1998bPETRERE, 2006a;ROBERT et al, 2007). These disparities between the sexes may be attributed to growth indices, mortality, longevity, differential migration of sexes and selectivity in fishery activities (D' INCAO, 1990;LINS-OLIVEIRA, 1996;ALBERTONI et al, 2003;PÉREZ-CASTAÑEDA;DEFEO, 2005;PETRERE, 2006aPETRERE, , 2006b.…”

“…In these ecosystems, shrimps represent one of the most important fishery resources exploited both worldwide and along the coast of Brazil (D' INCAO, 1991;VALENTINI et al, 1991;ALBERTONI et al, 2003;CASTRO et al 2005;GUSMÃO et al, 2005;PETRERE, 2006aPETRERE, , 2006bROBERT et al, 2007).…”

“…This situation results from the increasing pressure of industrial fisheries on adult stocks in the ocean, from a disregard for minimum capture size in estuarine fisheries by artisanal fishers, and from the degradation of these nursery areas (VILLELA et al, 1997;D' INCAO et al, 2002;PETRERE, 2006aPETRERE, , 2006b.…”

Prospective study of the fishery of the shrimp Plesionika narval (Fabricius, 1787) in the Northeastern Atlantic

“…However no study has focused on the selectivity of the fishing traps and yield-and biomass-perrecruit analysis for this species, these studies are required for the implementation of administrative measures to preserve the stock and for monitoring the effectiveness of these measures (Leite Junior and Petrere Junior, 2006;Penha and Mateus, 2007).…”