Premium
Evidence of density‐dependent effects on population variation of Japanese sardine ( Sardinops melanosticta ) off Korea
Author(s) -
KIM JIN YEONG,
KIM SUAM,
CHOI YOUNG MIN,
LEE JAE BONG
Publication year - 2006
Publication title -
fisheries oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 80
eISSN - 1365-2419
pISSN - 1054-6006
DOI - 10.1111/j.1365-2419.2006.00413.x
Subject(s) - sardine , fishery , ichthyoplankton , oceanography , abundance (ecology) , population , biology , geography , environmental science , fish <actinopterygii> , demography , geology , sociology
Interannual variation of some biological parameters for the Japanese sardine, Sardinops melanosticta , population in Korean waters was investigated using scientific surveys and fisheries information since the late 1970s. The abundance and geographical coverage of sardine eggs were high (peak in 1986) and broad when spawning biomasses were high in the mid 1980s, and vice versa in the late 1970s and the early 1990s. Also, feeding and spawning areas based on fisheries information exhibited the same pattern of expansion/contraction as seen in ichthyoplankton surveys. Annual Gonadal Somatic Index (GSI) in spawning season (February to April) and the size at age 1 of sardine were reduced during the high abundance period. It is suggested that density‐dependent effects on the reproduction and growth of the sardine population in Korean waters existed.