Open AccessVariations In The Age Composition Of Catch Of Anchovy (Engraulis Mordax) And Alternatives For The Management Of The Resource
Author(s) -
Ricardo Vidal-Talamantes
Publication year - 2021
Publication title -
ciencias marinas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.215
H-Index - 29
eISSN - 2395-9053
pISSN - 0185-3880
DOI - 10.7773/cm.v17i3.818
Subject(s) - engraulis , anchovy , fishery , geography , population , biomass (ecology) , oceanography , environmental science , demography , biology , ecology , geology , fish <actinopterygii> , sociology
The structure of the northern anchovy population before the disturbance caused by “El Niño” in 1982-1983 is analyzed. 20,205 age data originated from biological sampling of the commercial catches in Baja California throughout the 1978-1982 period were processed, and the results are presented here. The year classes responsible for the catch in 1979-1981 are identified. It is established that the one year old group has been the main catch generator. The age composition variability is described and a situation of capture of young individuals is observed. It is suggested to limit the capture of individuals younger than one year with the purpose of allowing a higher biomass incorporation by the growth process. The year class and recruitment concepts as well as their relation to vulnerability and social behavior processes are discussed.