caa a22 4500 445296364 CHVBK 20180317142543.0 cr unu---uuuuu 170323e20101001xx s 000 0 eng 10.1134/S0032945210080084 doi (NATIONALLICENCE)springer-10.1134/S0032945210080084 New data on the reproductive biology of shortspine thornyhead Sebastolobus alascanus (Sebastidae) in the northwestern Pacific [Elektronische Daten] [A. Orlov, A. Abramov] New data on fecundity, sex ratio in different size groups, and the rate of sexual maturation of shortspine thornyhead Sebastolobus alascanus in the northwestern part of the Pacific Ocean are provided. Individual absolute fecundity of the studied females varies in the range of 175 000-821000 (on average, 392500) eggs. In Pacific waters off the Kuril Islands and Kamchatka, among individuals with a length to 41 cm, males dominate; in size groups of 42-59 cm, sex ratio is almost equal; among larger fish, females prevail. In the western part of the Bering Sea among analyzed fish with a length to 44 cm, sex ratio is almost equal; among larger individuals, females dominate. Half of males and females of shortspine thornyhead off the eastern coast of the northern Kuril Islands and southeastern Kamchatka mature at a length of approximately 41 cm that can be recommended as a commercial size for the given species in this area. Pleiades Publishing, Ltd., 2010 shortspine thornyhead nationallicence fecundity nationallicence sex ratio nationallicence sexual maturation nationallicence northern Kuril Islands nationallicence southeastern Kamchatka nationallicence western part of the Bering Sea nationallicence Orlov A. Russian Federal Research Institute of Fishery and Oceanography (VNIRO), Verknyaya Krasnosel'skaya, 17, 107140, Moscow, Russia aut Abramov A. Russian Federal Research Institute of Fishery and Oceanography (VNIRO), Verknyaya Krasnosel'skaya, 17, 107140, Moscow, Russia aut Journal of Ichthyology SP MAIK Nauka/Interperiodica 50/8(2010-10-01), 632-639 0032-9452 50:8<632 2010 50 11489 https://doi.org/10.1134/S0032945210080084 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S0032945210080084 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Orlov A. Russian Federal Research Institute of Fishery and Oceanography (VNIRO), Verknyaya Krasnosel'skaya, 17, 107140, Moscow, Russia aut NATIONALLICENCE 700 1- Abramov A. Russian Federal Research Institute of Fishery and Oceanography (VNIRO), Verknyaya Krasnosel'skaya, 17, 107140, Moscow, Russia aut NATIONALLICENCE 773 0- Journal of Ichthyology SP MAIK Nauka/Interperiodica 50/8(2010-10-01), 632-639 0032-9452 50:8<632 2010 50 11489 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer