Premium
Transport and survival of Japanese sardine ( S ardinops m elanostictus ) eggs and larvae via particle‐tracking experiments
Author(s) -
Nishikawa Haruka,
Yasuda Ichiro,
Itoh Sachihiko,
Komatsu Kosei,
Sasaki Hideharu,
Sasai Yoshikazu,
Oozeki Yoshioki
Publication year - 2013
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/fog.12041
Subject(s) - sardine , larva , fishery , longitude , stock (firearms) , oceanography , biology , environmental science , geography , latitude , geology , ecology , geodesy , fish <actinopterygii> , archaeology
Particle‐tracking experiments were performed to infer the distribution of larvae of the J apanese sardine ( S ardinops melanostictus ) and to detect effects of transport environment on sardine recruitment, using the output of a high‐resolution ocean general circulation model and observed data of sardine spawning grounds during 1978–2004. By the 60th day following spawning, approximately 50% of the larvae had been transported to the K uroshio E xtension ( KE ). Whereas the spawning period and grounds changed markedly in relation to the stock level, the proportion of larvae transported to the KE remained relatively constant and no significant correlations were found between sardine recruitment and the transport proportion. Instead, the recruitment was found to be correlated with physical parameters including the mixed layer depth and the sea surface temperature along several major transport trajectories of sardine larvae. The correlations were most significant for the trajectories in the region 0.5° south to 1° north of the K uroshio axis (defined as the location of velocity maxima at each longitude) and for larvae spawned in F ebruary and M arch during the high stock period (1978–94), and for larvae spawned in M arch and A pril during the low stock period (1995–2004).