Resumo
In the feeding study of O. longirostris Menezes & Gèry, 1983, 211 stomachs from fish caught between March 1993 and February 1994 were analysed. Diet composition was analysed by the index of relative importance which deals with the numerical and gravimetric occurrence frequency. Results indicated that the species is piscivorous and its preferential food consisted oíAslyanax sp. 2. It was also found that Astyanax sp. 3 became an important food item, depending on the site of capture and its availability. Availability of prey seems to have a strong influence on the diet of O. longirostris. This same tendency has been observed during the different seasons of the year. Ontogenetic changes have also been found in the basic diet.
Oligosarcus longirostris; diet; piscivorous; Salto Segredo Reservoir
Oligosarcus longirostris; diet; piscivorous; Salto Segredo Reservoir
Alimentação de Oligosarcus longirostris Menezes & Gèry (Osteichthyes, acestrorhynchinae) do Reservatório de Salto Segredo, Paraná, Brasil
Feeding of Oligosarcus longirostris Menezes & Gèry (Osteichthyes, acestrorhynchinae) of the Salto Segredo Reservoir, Paraná, Brazil
Ana Maria GealhI; Norma Segatti HahnII
IDepto de Biologia Geral, Universidade Estadual de Ponta Grossa. Praça Santos Andrade, 84010-790 Ponta Grossa, Paraná, Brasil
IINupelia, Universidade Estaudal de Maringá. Avenida Colombo 5790, 87020-900 Maringá, Paraná, Brasil
ABSTRACT
In the feeding study of O. longirostris Menezes & Gèry, 1983, 211 stomachs from fish caught between March 1993 and February 1994 were analysed. Diet composition was analysed by the index of relative importance which deals with the numerical and gravimetric occurrence frequency. Results indicated that the species is piscivorous and its preferential food consisted oíAslyanax sp. 2. It was also found that Astyanax sp. 3 became an important food item, depending on the site of capture and its availability. Availability of prey seems to have a strong influence on the diet of O. longirostris. This same tendency has been observed during the different seasons of the year. Ontogenetic changes have also been found in the basic diet.
Key words:Oligosarcus longirostris, diet, piscivorous, Salto Segredo Reservoir.
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AGRADECIMENTOS. Agradecemos ao Nupelia (Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura) pelo apoio logístico, ao Convênio Uem/Copel pelo apoio financeiro, ao Prof. Dr. Ângelo A. Agostinho pela oportunidade e a Vera. Lúcia L. Almeida pela leitura e sugestões.
REFERÊNCIAS BIBLIOGRÁFICAS
AGOSTINHO, A.A.; L.M. BINI; L.C. GOMES. 1997. Ecologia de comunidades de peixes da área de influência do reservatório de Segredo, p.97-111. In: A.A. Agostinho & L.C. Gomes (Ed.): Reservatório de segredo-bases para o manejo. Maringá, Eduem, 386p.
ALMEIDA, V.L.L. DE; N.S. HAHN; A.E.A.M. VAZZOLER. (no prelo). Feeding patterns in five predatory fishes of the high Paraná Riverfloodplain (PR, Brazil). Ecology of Freshwater Fish.
HAHN, N.S.; A.A. AGOSTINHO; R. GOITEIN. (no prelo). Feeding ecology of curvina Plagioscion squamosissimus (Heckel, 1840) (Pisces, Perciformes) in the Itaipu Reservoir and Porto Rico floodplain. Acta Limnologica Brasiliensia.
HYNES, H.B.N. 1950. The food of freshwater sticklebacks (Gasterosteus aculeatus and Pigosteus pungitius), with a review of methods used in studies of the food of fishes. Jour. Anim. Ecol. 19 (1): 36-35.
HYSLOP, E.J. 1980. Stomach contents analysis, a review of methods and their application. Jour. Fish Biol. 17: 411-429.
Krebbs, C.J. 1989. Ecologycal methodology. New York, Harper Collins Publishers, 654p.
LAGLER, K.F.; J.E. BARDACH; R.R. MILLER; D.R.M. PASSINO. 1977. Ichtyology. New York, John Wiley & Sons, 2nd ed., 506p.
LOUREIRO, V.E.; N.S. HAHN. 1996. Dieta e atividade alimentar da traíra, Hoplias malabaricits (Bloch, 1794) (Osteichthyes, Erythrynidae), nos primeiros anos de formação do reservatório de Segredo-PR. Acta Limnologica Brasiliensia 8: 195-205.
LOWE-McCONELLI, R.H. 1987. Ecological studies in tropical fish communities. Cambridge, University Academic Press., 382p.
MOYLE, P.B. & J.J. CECH Jr. 1988. Fishes: an introduction to ichthyology. Englewood Cliffs, Prentice Hall, 2nd, 559p.
NIKOLSKY, G.V. 1963. The ecology of fishes. London, Academic Press, 352p. Pianka, E.R. 1982. Ecologia evolutiva. Barcelona, Omega, 312p.
PINKAS, L. 1971. Food habits study, p. 5-10. In: L. Pinkas; M.S. Oliphant; I.L.K. Iverson (Ed.). Food habits of albacore bluefin tuna, and bonito in Califórnia waters. Fish Bull. 152: 1-105.
PITCHER, TJ. & P.J.B. Hart. 1982. Fisheries ecology. London, Croom Helm, 414p.
POPOVA, A.O. The role of predaceous fish in ecosystems, p.215-249. In: S.D. Gerking (Ed.). Ecology of Freshwater Fish Production. Oxford, Blackwell Scientific, 520p.
ROSECCHI, L. & Y. NOUAZE. 1987. Comparaison de cinq êndices alimentaires utilisés dans l'analyse des contenus stomacaux. Rev. Trav. Pèches mar. 49 (4): 111-123.
WELCOME, R.L. 1979. Fisheries ecology of floodplain rivers. London, Longman, 317p.
WOOTON, R.J. 1990. Ecology of teleost fishes. London, Chapman and Hall, 404p.
Recebido em 19.IX.1997; aceito em 17.XI.1998.
- AGOSTINHO, A.A.; L.M. BINI; L.C. GOMES. 1997. Ecologia de comunidades de peixes da área de influência do reservatório de Segredo, p.97-111. In: A.A. Agostinho & L.C. Gomes (Ed.): Reservatório de segredo-bases para o manejo. Maringá, Eduem, 386p.
- ALMEIDA, V.L.L. DE; N.S. HAHN; A.E.A.M. VAZZOLER. (no prelo). Feeding patterns in five predatory fishes of the high Paraná Riverfloodplain (PR, Brazil). Ecology of Freshwater Fish.
- HAHN, N.S.; A.A. AGOSTINHO; R. GOITEIN. (no prelo). Feeding ecology of curvina Plagioscion squamosissimus (Heckel, 1840) (Pisces, Perciformes) in the Itaipu Reservoir and Porto Rico floodplain. Acta Limnologica Brasiliensia.
- HYNES, H.B.N. 1950. The food of freshwater sticklebacks (Gasterosteus aculeatus and Pigosteus pungitius), with a review of methods used in studies of the food of fishes. Jour. Anim. Ecol. 19 (1): 36-35.
- HYSLOP, E.J. 1980. Stomach contents analysis, a review of methods and their application. Jour. Fish Biol. 17: 411-429.
- Krebbs, C.J. 1989. Ecologycal methodology. New York, Harper Collins Publishers, 654p.
- LAGLER, K.F.; J.E. BARDACH; R.R. MILLER; D.R.M. PASSINO. 1977. Ichtyology. New York, John Wiley & Sons, 2nd ed., 506p.
- LOUREIRO, V.E.; N.S. HAHN. 1996. Dieta e atividade alimentar da traíra, Hoplias malabaricits (Bloch, 1794) (Osteichthyes, Erythrynidae), nos primeiros anos de formação do reservatório de Segredo-PR. Acta Limnologica Brasiliensia 8: 195-205.
- LOWE-McCONELLI, R.H. 1987. Ecological studies in tropical fish communities. Cambridge, University Academic Press., 382p.
- MOYLE, P.B. & J.J. CECH Jr. 1988. Fishes: an introduction to ichthyology. Englewood Cliffs, Prentice Hall, 2nd, 559p.
- NIKOLSKY, G.V. 1963. The ecology of fishes. London, Academic Press, 352p.
- Pianka, E.R. 1982. Ecologia evolutiva. Barcelona, Omega, 312p.
- PINKAS, L. 1971. Food habits study, p. 5-10. In: L. Pinkas; M.S. Oliphant; I.L.K. Iverson (Ed.). Food habits of albacore bluefin tuna, and bonito in Califórnia waters. Fish Bull. 152: 1-105.
- PITCHER, TJ. & P.J.B. Hart. 1982. Fisheries ecology. London, Croom Helm, 414p.
- POPOVA, A.O. The role of predaceous fish in ecosystems, p.215-249. In: S.D. Gerking (Ed.). Ecology of Freshwater Fish Production. Oxford, Blackwell Scientific, 520p.
- ROSECCHI, L. & Y. NOUAZE. 1987. Comparaison de cinq êndices alimentaires utilisés dans l'analyse des contenus stomacaux. Rev. Trav. Pèches mar. 49 (4): 111-123.
- WELCOME, R.L. 1979. Fisheries ecology of floodplain rivers. London, Longman, 317p.
- WOOTON, R.J. 1990. Ecology of teleost fishes. London, Chapman and Hall, 404p.
Datas de Publicação
-
Publicação nesta coleção
01 Jul 2009 -
Data do Fascículo
Dez 1998
Histórico
-
Aceito
17 Nov 1998 -
Recebido
19 Set 1997
