New data on distribution and biology of gray, angry, and northern Rockfishes from the northwestern Pacific

New data on distribution and biology of gray, angry, and northern Rockfishes from the northwestern Pacific

A.M. Orlov, and A.M. Tokranov

New data on distribution and biology of gray, angry, and northern Rockfishes from the northwestern PacificThis is part of Biology, Assessment, and Management of North Pacific Rockfishes
PDF    
To download the free PDF [685 KB], please enter:
-or-

Description

Despite relatively small numbers of rockfish species inhabiting the western North Pacific and quite intensive studies conducted recently in the Pacific waters off the northern Kuril Islands and southeastern Kamchatka, the distribution patterns and biological features of gray rockfish Sebastes glaucus, angry rockfish S. iracundus, and northern rockfish S. polyspinis, remain poorly understood. On the basis of data collected during 1993-2000 bottom trawl surveys and 1992-2002 commercial fishing operations within the depth range of 83-850 m, some quantitative indices of occurrence of gray, angry, and northern rockfishes in the study area are provided. In addition, their spatial and depth distributions are analyzed, bottom temperature preferences are shown, size composition and length-weight relationships are considered, and the diurnal, seasonal, and multi-annual changes of catch rates and occurrence in catches are analyzed.

Item details