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Population dynamics of tambaqui, Colossoma macropomum Cuvier, in the Lower Amazon, Brazil
Author(s) -
ISAAC V.J.,
RUFFINO M.L.
Publication year - 1996
Publication title -
fisheries management and ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 55
eISSN - 1365-2400
pISSN - 0969-997X
DOI - 10.1046/j.1365-2400.1996.d01-154.x
Subject(s) - tambaqui , overfishing , amazon rainforest , fishing , fishery , population , geography , fish <actinopterygii> , biology , ecology , demography , sociology
Fishery statistics and length data series for Colossoma macropomum Cuvier obtained during 1992 and 1993 in the Lower Amazon, Brazil were used to describe the fishery and to estimate growth and mortality rates. Mean population parameters were L ∞ = 119.85 cm (total length), W ∞ = 33.4 kg, K = 0.228 year –1 , C = 0.505, Winter Point = July, M = 0.445 year –1 , F = 0.94 year –1 and L c = 28.29 cm. Yield‐per‐recruit analysis showed that an excessive fishing effort and principally a very low length at first capture lead to an increase in overfishing in the region. Corrective measures are recommended.