Análise da pesca da corvina na costa centro-sul do Brasil

Vazzoler, Anna Emilia Amato de Moraes; Sá, E. M. de

doi:10.1590/s0373-55241963000200006

Cited by 6 publications

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“…Micropogon furnieri (DESMAREST, 1822) JORDAN, 1884 ( corvina) é um peixe de grande importância econômica na costa centro•sul do Brasil, sendo capturado em quantidnrles consideráveis (RICHARDSON & MORAEs, 1960;VAZZOLER & SÁ, 1963). Alguns aspectos de seu ciclo de vida, comportLmento e abundância já foram estudados (VAZZOLER, G., 1962;FRANCO, 1959;VANNUCCI, 1963;VAZZOLER, 1963a;VAZZOLER & SANTOS, 1965;VAZZOLER, 1965).…”

Section: Introductionunclassified

Micropogon furnieri: fecundidade e tipo de desova

Vazzoler

1969

Bol. Inst. Oceanogr.

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Section: Introductionunclassified

Micropogon furnieri: fecundidade e tipo de desova

Vazzoler

1969

Bol. Inst. Oceanogr.

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Estimativa da abundância relativa de corvina na costa centro-sul do Brasil

Vazzoler

1965

Bol. Inst. Oceanogr.

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SYNOPSISThe aim of this paper is to evaluate the apparent abundance of the croaker (Micrapogon furnieri) along the central and southern coast of Brazil (from 23°50'S to 35°S). The data on catch 'and effort of the fish taken in the same area and at the same time, with different gear, are analysed from January 1959 to December 1962.The different gears used were reduced to the same leveI of efficiency, and the apparent abundance was estimated according to the fishing area (area I -from 23°50'S to 26°S, and area II -from 26°S to 35°S) , by quarters and by year.The results allow us to draw the following conclusions: 1 -There is a tendency of increase of the apparent abundance from the beginning to the end of each year and of decrease in following years, in Doth areas. The decrease is greater in area II.2 -The leveIs of apparent abundance, in both areas, was very · different. The leveI in area II is higher.3 -Variations in the availability during the year, were observed. Data suggest that they are determined in area I by extrinsic factors, and in area II by intrinsic factors.4 -Different responses of the stock, in both areas, to fishing intensity was verified, supporting the hypothesis of occurrence of two different croaker stocks. The stock of area I probably has reached a state of equilibrium with the fishery while in area II the stock has not yet reached this stage. INTRODUÇÁONa estimativa da densidade de uma população natural, a pesca comercial pode ser considerada como uma fonte de amostragem dessa população, sendo que a produção por unidade de esfôrço reflete, até certo ponto, as variações da densidade relativa.A densidade e abundância relativas de uma população natural estão relacionadas com as verdadeiras densidade e abundância, pela disponibilidade.•• Os dados utilizados na preparação dês te trabalho foram cedidos pelo "Grupo de Pesquisas sôbre a Pesca lVIarlt1ma", a quem agradecemos. Publ. no 203 do Inst. Oceano da USP.

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Análise da pesca da pescada-foguete na costa centro-sul do Brasil

Yamaguti

Moraes

1965

Bol. Inst. Oceanogr.

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SYNOPSISIn this p"aper data on catch and effort by gear are analysed, for weakfish (Macrodon ancylodon ) landed at Santos from January 1959 to December 1963. The region studied was a narrow band , about 30 natitical miles wide, along the southern coast of Brazil, between 23° S and 34° S.From the analysis of monthly data of pI'oduction per unit-effort by -squares of 1° on a side, we divided the studied region in two areas: area I (from 23° S to 27° S) and area II (from 28° S to 34° S). The index of unit-effort production and the effort concentration index were computed grouping the data by quarters.! From the results we may drow the following conclusions:1 -In a general way, thé effort for catch weak-fish has been applied satisfactorily because the ·.medium and large parejas have operated almost in areas with average density on' higher than average density; 2 -The production per unit-effort in the area I is smaller than the production in area lI, which suggests that the ' index of abundance is higher in area lI; 3 -The decrease in production per unit-effort, in are a lI, suggests a decrease in the abundance or availability of weak-fish in this area; 4 -In the area I, the index of production per unit-effort remained approximately at the same leveI. INTRODUÇÃONeste trabalho são apresentados os resultados da análise dos índices de produção da pescada-foguete por unidade de esfôrço e dos índices de concentração· de esfôrço; a finalidade foi determinar Publ. n o 218 do Inst. Oceano da USP.

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Análise da pesca da corvina na costa centro-sul do Brasil

Cited by 6 publications

References 1 publication

Micropogon furnieri: fecundidade e tipo de desova

Micropogon furnieri: fecundidade e tipo de desova

Estimativa da abundância relativa de corvina na costa centro-sul do Brasil

Análise da pesca da pescada-foguete na costa centro-sul do Brasil

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