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The Biology of the Pelagic Amphipod, Primno macropa Guer., in the Western North Pacific: 2. Geographical Distribution and Vertical Distributional Pattern

ѱȸ 1972 15 2ȣ p.87 ~ 91
Yoo Kwang-Il,
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 ( Yoo Kwang-Il ) - Seoul National University Department of Oceanography

Abstract

ݻ ǿ ־ ֿ ѿ ̸ ҵ 洰 ־ ͱ ̴. 20 47 ̸ 50 ݻ ǰ ݾ ģ ۸ Ͽ ֿ ο ̸ . ̿ 68ǿ ν ݩ Ӯ׾鿡 ϰ ݻ 洿 ϰ ϰ ϼ٥Ǿ. δ 0 $\\sim$ 1,500m ߾ ϰ 229 $(34^\\circ 44.3'N, 140^\\circ 04.4'E)$ 1,650 $\\sim$ 2,220m . ࿡ ݻ ϸ ࿡ ݻ ϰ . ̴ 100 $\\sim$ 200m Ѵ. 洿 洿 Ͽ ̰ ٸ. 洿 0 $\\sim$ 200m 100 $\\sim$ 300m ϸ 100m ̷ ϴµ Ͽ 洿 400 $\\sim$ 700m, 100 $\\sim$ 500m 200m ̷ Ѵ. ̴ 洿 ־ ٸ ׵Ǵ ȴ.

For the geographical distribution of Primno macropa it was distributed over all stations investigated, except surface tow in East China Sea, through all seasons. It is believed that this species is most cosmopolitan species in the western North Pacific. Veritical distributional range of P. macropa indicates at depths from surface to more than 1,500m and most deeper recored for the vertical occurrence was obtained from depth of 1,650-2,220m in Station 229 $(34^\\circ 44.3'N, 140^\\circ 04.4'E)$, off Nojima-Zaki, Central Japan. For the vertical distributional and migrational pattern it is a typical diurnal migrant in the western North Pacific; at depths from 100m to 500m at night and 400m to 700m at day in Oyashio population, and from surface to 200m at night and from 100m to 300m at day in Kuroshio population. In Kuroshio area, the population of P. macropa was distributed in somewhat shallower layers than in Oyashio area and it is suggested that the populations is different in region and season according to their stages consisting the population.

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