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Beiträge zur Biologie von Lutjanus analis (Cuvier & Valenciennes, 1828) (Lutjanidae, Perciformes, Pisces) an der kolumbianischen Atlantikküste
Author(s) -
Erhardt Harry,
Meinel Werner
Publication year - 1977
Publication title -
internationale revue der gesamten hydrobiologie und hydrographie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 52
eISSN - 1522-2632
pISSN - 0020-9309
DOI - 10.1002/iroh.1977.3510620111
Subject(s) - biology , lutjanidae , fishery , fecundity , perciformes , fish <actinopterygii> , population , demography , sociology
Investigations on the biology of the red snapper Lutjanus analis (Cuvier & Valenciennes, 1828) were made in three different areas along the Colombian Atlantic Coast. Egg counting was carried out on 16 females. The numbers of eggs were correlated with the length and the weight of the fish. The results are presented in graphs, average values and regression equations. To find the best mathematical relation between the fecundity, the length and the weight, linear and exponential equations were used. The best approximation to the relation between the number of eggs and the weight of the individuals was calculated by the parabola equation F = 20803 × G 0.303 , whereas the relation between the number of eggs and the length of the animals was most closely approached by the parabola equation F = 2922 × L 1.1 . Juvenile red snappers of a total length of 10 to 40 cm are very common in shallow‐water grass beds. The adult fishes migrate to offshore reefs and into deeper waters. The sex ratio of the red snapper was about equal in all catches. The largest fishes we have found were males.