Distribution and some traits of biology of the elongated sculpin Alcichthys elongatus in the north-western part of the Sea of Japan

Autor: V. V. Panchenko, O. I. Pushchina, P. V. Kalchugin, S. F. Solomatov, D. V. Antonenko
Rok vydání: 2011
Předmět:
Zdroj: Journal of Ichthyology. 51:217-226
ISSN: 1555-6425
0032-9452
DOI: 10.1134/s0032945211010103
Popis: It has been found, with reference to the data of trawl survey and literature, that, in the Sea of Japan, the Northern boundary of the area of the elongated sculpin Alcichthys elongatus is the central part of the Tatar Strait. During the year, the elongated sculpin occurs at depths from 7 to 650 m. Its highest concentration forms during the feeding period. At this time Alcichthys elongatus stays up to depths 253 m but prefers the range of 40–100 m. It winters below the 50 m isobath, mainly in the lower part of the shelf and in the upper section of the continental slope. Being an eurythermal species, the elongated sculpin occurs in a wide range of temperature (from −1.6 to 17.7°C). However, most specimens prefer waters with slightly positive temperature. Juveniles prefer the warm water layers. Males are larger than females but the latter dominate in catches. According to the kind of diet A. elongatus, it is a benthoichtyophage consuming predominantly decapods (mostly juveniles of Chionoecetes opilio) and small fish. In summer, the value of daily ration is 3.0% of the body weight. In the north-western part of the Sea of Japan, A. elongatus may be characterized as a common species with a low but stable abundance.
Databáze: OpenAIRE
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