论文部分内容阅读
一、渔场环境条件及狭鳕资源分布状况 鄂霍次克小公海狭鳕渔场北起55°43′N,南至53°40′N(实际生产范围),东自150°12′E,西至148°40′E。渔场呈南北走向,水深西浅东深,北高南低,东西坡度变化不甚大,但南北水深变化速度较快,由于东西海域窄,加之东西限制线外均为俄罗斯经济专属区,故拖网曳向一般在东线西线附近均为南北向,在中部渔场少数为东南西北向。 鄂霍次克海地处亚寒带,气候主要取决于冬、夏季冷、暖空气势力的强弱。冬天冷空气入侵频繁,随着沿岸水温的迅速下降,鄂霍次克公海水温也迅速下降。1月上旬末到中旬,公海西北部即出现浮冰,1月底至3月中旬公海渔场基本被冰覆盖。春季冷空气逐步减弱,来自洋面的暖空气势力逐渐增强,海冰从3月底自南向北逐渐溶化,浮冰自北向南漂移。初夏时,太平洋亲潮与
First, the fisheries environmental conditions and pollock resources distribution Okhotsk small high bay fishing ground from 55 ° 43’N north, south to 53 ° 40’N (actual production range), east from 150 ° 12’E, west To 148 ° 40’E. The fishing ground is in the north-south direction. The water depth is shallow in the east and the deepest in the north, low in the north, high in the south and low in the east-west slope. However, the water depth changes rapidly between the north and south. Due to the narrow sea and river limits and the east- To the general in the east line of the vicinity of the north-south are in the middle of a small number of fisheries for the southeast northwest. Sea of Okhotsk is located in the subtropical zone, the climate depends mainly on the winter, summer cold, warm air force strength. Cold air intrusion frequently in winter, with the rapid decline of water temperature along the coast, Okhotsk’s water temperature on the high seas also declined rapidly. From the end of January to the middle of the first month, ice floes appear in the northwest of the high seas. From the end of January to mid-March, the open sea fisheries are basically covered by ice. The cold air gradually weakened in spring, and the warm air from the ocean gradually strengthened. The sea ice gradually melted from south to north from the end of March, and drifting ice drifted north to south. Early summer, the Pacific Ocean tide and