Distribution and some traits of biology of Lycodes tanakae (Perciformes: Zoarcidae) in Primor’e waters (Sea of Japan)
With consideration of investigations made in 2004–2010, the spatial distribution of Lycodes tanakae , as well as some traits of its biology in Primor’e waters, is described. This species occurs all over the investigated region—from 42° to 49°N as explained by hydrological properties of bottom waters...
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Published in | Journal of ichthyology Vol. 51; no. 9; pp. 745 - 757 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Dordrecht
SP MAIK Nauka/Interperiodica
01.11.2011
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Subjects | |
Online Access | Get full text |
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Summary: | With consideration of investigations made in 2004–2010, the spatial distribution of
Lycodes tanakae
, as well as some traits of its biology in Primor’e waters, is described. This species occurs all over the investigated region—from 42° to 49°N as explained by hydrological properties of bottom waters and by the bottom relief of this water area. In Promor’e waters,
Lycodes tanakae
occurs at depths of 87–1034 m. However, the majority of specimens (90%) prefers depths of 200–700 m. Thus, it can be attributed to the mesobathial ecological fish group. In spring and summer, juveniles of
L. tanakae
live at similar depths (200–350 m) where this species seems to spawn. In catches,
L. tanakae
is represented by specimens 11–90 cm in length, 0.1–4.9 kg in weight, and age from 1 to 10 years. The bulk of catches consists of specimens 40–70 cm long (62%), up to 2.2 kg in weight (90%), and of the age 4–7 years (72%). Sexual dimorphism in linear dimensions is not determined in
L. tanakae
. In summer, the ration of
L. tanakae
in Primor’e waters consists predominantly of cephalopods (on average, 59.4% of food weight). A noticeable part belongs to decapods (19.8%) and fish juveniles (16.6%). The smallest analyzed specimens consume small decapods and polychaetes. At the body length over 40 cm,
L. tanakae
pass over to predation. The value of the daily ration of
Lycodes tanakae
is, on average, 1.5% of the body weight. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0032-9452 1555-6425 |
DOI: | 10.1134/S0032945211050195 |