Biota and Environment of Natural Areas

Markevich A.I.

Impact of water temperature and depth on breeding of fishes – sea raven Hemitripterus villosus and Japan sea greenling Pleurogrammus azonus in the Far Eastern Marine Biosphere Reserve

Year: 2011, Number: 1, Pages: 121-133

Impact of water temperature and depth on breeding of Hemitripterus villosus and Pleurogrammus azonus was studied by SCUBA methods on the spawning grounds in the Far East Marine Biosphere Reserve. Start of the both species’ spawning period was in the beginning of September under water temperature lower 19°С. The peak of sea raven’ spawning was observed in the mid-and end of September on the depth of 0.7-2.0 m and temperature 17-18°С. The most quantity of Japan sea greenling’ egg masses were laid on the depth of 6 to 18 m (83.4%), preferable interval was 8-12 m, water temperature – 16-17°С. In 2003 and 2008 years were recorded the shifts of sea raven spawning period on 5 and 12 days later. Fig. 2, ref. 35.

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