Resumo
Rhythmic activity patterns are demonstrated for 15 species of fish in várzea lakes of the Solimões river by analyzing catch per hour-of-day data. Supplemented by visual observation, an array of six gillnets of equal length but different mesh size was used for collecting. The data, in general, show a bimodal pattern of activity. The two peaks of catch can be related to movement during twilight periods, while low catches can be ascribed to reduced activity during times close to mid-day or night Observed activity peaks correspond to local displacements of fish between feeding and shelter sites. In the case of piscivorous fishes, activity peaks could be explained by facility in prey localization, which is greatest during twilight periods when prey species are moving.
Uso de redes de espera no estudo de ritmos circadianos de algumas espécies de peixes nos lagos de várzea do rio Solimões
Ronaldo Borge Barthem
Museu Paraense Emílio Goeldi, C. P. 399, 66.000 Belém, PA
ABSTRACT
Rhythmic activity patterns are demonstrated for 15 species of fish in várzea lakes of the Solimões river by analyzing catch per hour-of-day data. Supplemented by visual observation, an array of six gillnets of equal length but different mesh size was used for collecting. The data, in general, show a bimodal pattern of activity. The two peaks of catch can be related to movement during twilight periods, while low catches can be ascribed to reduced activity during times close to mid-day or night Observed activity peaks correspond to local displacements of fish between feeding and shelter sites. In the case of piscivorous fishes, activity peaks could be explained by facility in prey localization, which is greatest during twilight periods when prey species are moving.
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AGRADECIMENTOS
Ao apoio financeiro, cedido em forma de bolsa, do CNPq. A Horst O. Schwassmann, Mauro C. L. B. Ribeiro e David C. Oren, pela discussão e leitura do texto. A Antônio C. S. Martins, pelo capricho nos desenhos.
Referências
Carlander, K. D., 1953. Use of gillnets in studying fish poputions, Clear Lake. lowa Acad. Sci. 60:621-625.
Cloudsley-Thomson, J. L., 1961. Rhythmic activity in animal physiology and behavior, 236 pp. Academic Press, New York & London.
Goulding, M., 1979. Ecologia da pesca do rio Madeira. Conselho Nacional de Desenvolvimento Científico e Tecnológico, Instituto Nacional de Pesquisas da Amazônia, Manaus.
Goulding, M., 1980. The fishes and the forest. University of California Press, Los Angeles.
Goulding, M., 1981. Man and fisheries on an Amazonian frontier. Junk Publishers, The Hague.
Hobson, E. S., 1972. Activity of Hawaiian reef fishes during the evening and morning transitions between daylight and darkness. Fishery Bull. 70(3):715-740.
Lissmann, H. W. & H. O. Schwassmann, 1965. Activity rhythm of an electric fish, Gymnorhamphicthys hypostomus Ellis. Z. verg1. Phys. 51:153-171 ic
Lowe-McConnell, R. H., 1967. Some factors affecting fish populations in Amazonian waters. Atas Simp. Biota amaz. 7.
Lowe-McConnell, R. H., 1975. Fish communities in tropical tresh waters. Longman New York.
Manteifel, B. P., I.I. Girsa & S. Pavlov, 1978. On rhythms of fish behaviour, pp. 215-224, in Thorpe, J.E., ed., Rhythmic activity of fish. Academic Press, London
Mesckat, A , 1958 malhadeiras de pesca. Superintendência do Plano de Valorização Econômica da Amazônia, Belém.
Petrere Jr , M., 1978 Pesca e esforço de pesca no Estado do Amazonas. III. Locais de pesca, aparelhos de captura e estatística de desembarque. Acta smaz. 8(3) (Supl. 2).
Schwassmann, H. O., 1971a Circadian activity patterns in gymnotid electric fish, pp. 185-199, in Biochronometry. National Academy of Sciences, Washington, D. C.
Schwassmann, H. O., 1971b. Biological rhythms, pp. 371-428, in Fish Physiology 6. Academic Press. New York & London.
Schwassmann, H. O., 1978. Activity rhythm in gymnotid electric fishes, pp. 235-244, in Thorpe, J. E., ed., Rhythmic activity of fishes. Academic Press, London
Schwassmann, H. O., 1980. Biological rhythms: Their adaptative significance, pp. 613-630, in Ali, M. A., ed., Environmental physiology of fishes. Plenum Publ. Co.
- Carlander, K. D., 1953. Use of gillnets in studying fish poputions, Clear Lake. lowa Acad. Sci. 60:621-625.
- Cloudsley-Thomson, J. L., 1961. Rhythmic activity in animal physiology and behavior, 236 pp. Academic Press, New York & London.
- Goulding, M., 1979. Ecologia da pesca do rio Madeira. Conselho Nacional de Desenvolvimento Científico e Tecnológico, Instituto Nacional de Pesquisas da Amazônia, Manaus.
- Goulding, M., 1980. The fishes and the forest. University of California Press, Los Angeles.
- Goulding, M., 1981. Man and fisheries on an Amazonian frontier. Junk Publishers, The Hague.
- Hobson, E. S., 1972. Activity of Hawaiian reef fishes during the evening and morning transitions between daylight and darkness. Fishery Bull. 70(3):715-740.
- Lissmann, H. W. & H. O. Schwassmann, 1965. Activity rhythm of an electric fish, Gymnorhamphicthys hypostomus Ellis. Z. verg1. Phys. 51:153-171 ic
- Lowe-McConnell, R. H., 1967. Some factors affecting fish populations in Amazonian waters. Atas Simp. Biota amaz. 7.
- Lowe-McConnell, R. H., 1975. Fish communities in tropical tresh waters. Longman New York.
- Manteifel, B. P., I.I. Girsa & S. Pavlov, 1978. On rhythms of fish behaviour, pp. 215-224, in Thorpe, J.E., ed., Rhythmic activity of fish. Academic Press, London
- Mesckat, A , 1958 malhadeiras de pesca. Superintendência do Plano de Valorização Econômica da Amazônia, Belém.
- Petrere Jr , M., 1978 Pesca e esforço de pesca no Estado do Amazonas. III. Locais de pesca, aparelhos de captura e estatística de desembarque. Acta smaz. 8(3) (Supl. 2).
- Schwassmann, H. O., 1971a Circadian activity patterns in gymnotid electric fish, pp. 185-199, in Biochronometry. National Academy of Sciences, Washington, D. C.
- Schwassmann, H. O., 1971b. Biological rhythms, pp. 371-428, in Fish Physiology 6. Academic Press. New York & London.
- Schwassmann, H. O., 1978. Activity rhythm in gymnotid electric fishes, pp. 235-244, in Thorpe, J. E., ed., Rhythmic activity of fishes. Academic Press, London
- Schwassmann, H. O., 1980. Biological rhythms: Their adaptative significance, pp. 613-630, in Ali, M. A., ed., Environmental physiology of fishes. Plenum Publ. Co.
Datas de Publicação
-
Publicação nesta coleção
21 Ago 2009 -
Data do Fascículo
1986
