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Age, growth, length–weight relationship, sex ratio and food habits of the Argentine pejerrey, Basilichthys bonariensis (Cuv. and Val.), from Lake Peñuelas, Valparaíso, Chile
Author(s) -
Burbidge Richard G.,
Carrasco Mario C.,
Brown Peter A.
Publication year - 1974
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1974.tb04546.x
Subject(s) - biology , sex ratio , zoology , cladocera , body weight , ecology , crustacean , demography , endocrinology , population , sociology
Argentine pejerreys were collected in Lake Peñuelas during January 1973. Calculated growth rate was maximum during the 3rd year of life. The length–weight relationship was: log W =‐5.69395+3.25248 log L where W =weight (g), and L =total length (mm). Agegroup I was sexually mature. The sex ratio was 85 males (54%) to 73 females (46%). Young‐of‐the‐year pejerreys fed primarily on copepods, but cladocerans [ Bosmina sp. (Baird), Diaphanosoma brachyurum (Liéven), Simocephalus serrulatus (Koch)], ostracods, and dipterans were also represented. Feeding occurred during daylight.