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Food and feeding habits of king weakfish, Macrodon ancylodon (Bloch & Schneider, 1801) caught in the southern coast of Brazil (Lat. 29º to 32ºS)

Abstract

Macrodon ancylodon was obtained from landings in Santos Port (São Paulo State) of fish caught monthly by commercial vessels, on the southern coast of Brazil during September 1976 to August 1977. The measurements of total lenght, total weight determination of sex and maturity stages were made. The food items found in stomach contents were: shrimp (Artemesia longinaris), fishes (Paralonchurus brasiliensis, Macrodon ancylodon, Trichirus lepturus, Gadidae, Engraulidae), molluscs (Loliginidae, Bivalvia) and Stomatopoda. Widening of food spectrum was observed in winter. The index of preponderance showed that immature females, immature and mature males fed predominantly on shrimp, while mature females fed mainly on fishes. During spring and summer (spawning season) M. ancylodon exhibited relatively low percentage of full stomachs. Cannibalism was encountered more intensively for mature fish.

Feeding; Feeding behaviour; Stomach content; Food organisms; Macrodon ancylodon; Southern coast


ARTIGOS

Food and feeding habits of king weakfish, Macrodon ancylodon (Bloch & Schneider, 1801) caught in the southern coast of Brazil (Lat. 29º to 32ºS)* (* ) Paper based in part on a MSc. Dissertation submitted to the Instituto Oceanográfico da Universidade de São Paulo, by the senior author.

Anastácio Afonso JurasI; Noriyoshi YamagutiII

IDepartamento de Biologia da Universidade Federal do Maranhão (Praça Gonçalves Dias, 21, 65.000 São Luiz, MA)

IIInstituto Oceanográfico da Universidade de São Paulo (Caixa Postal 9075, 01000, São Paulo, SP)

SYNOPSIS

Macrodon ancylodon was obtained from landings in Santos Port (São Paulo State) of fish caught monthly by commercial vessels, on the southern coast of Brazil during September 1976 to August 1977. The measurements of total lenght, total weight determination of sex and maturity stages were made. The food items found in stomach contents were: shrimp (Artemesia longinaris), fishes (Paralonchurus brasiliensis, Macrodon ancylodon, Trichirus lepturus, Gadidae, Engraulidae), molluscs (Loliginidae, Bivalvia) and Stomatopoda. Widening of food spectrum was observed in winter. The index of preponderance showed that immature females, immature and mature males fed predominantly on shrimp, while mature females fed mainly on fishes. During spring and summer (spawning season) M. ancylodon exhibited relatively low percentage of full stomachs. Cannibalism was encountered more intensively for mature fish.

Descriptors: Feeding, Feeding behaviour, Stomach content, Food organisms, Macrodon ancylodon, Southern coast: Brazil

Descritores: Alimentação, Hábitos alimentares, Conteúdo estomacal, Itens alimentares, Macrodon ancylodon, Costa sul: Brasil

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Texto completo disponível apenas em PDF.

Acknowledgements

The authors are very grateful to Ilidia da Ascenção Garrido Martins-Juras (MSc) for many helpful suggestions in the preparation of the manuscript; this research was supported in part by the Conselho Nacional de Desenvolvimento Cientifico e Tecnologico - CNPq.

(Received 03-Jun-85; accepted 18-Dec-85)

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  • (*
    ) Paper based in part on a MSc. Dissertation submitted to the Instituto Oceanográfico da Universidade de São Paulo, by the senior author.
  • Publication Dates

    • Publication in this collection
      04 June 2012
    • Date of issue
      1985

    History

    • Accepted
      18 Dec 1985
    • Received
      03 June 1985
    Instituto Oceanográfico da Universidade de São Paulo Praça do Oceanográfico, 191, 05508-120 São Paulo SP Brasil, Tel.: (55 11) 3091 6513, Fax: (55 11) 3032 3092 - São Paulo - SP - Brazil
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