The result shows that the fishing ground with high catch was focused at 26°~28°N and 122°~124°E for the southern region, and 32°~38°N and 123°~125°E for the northern region respectively.
The result indicated that in South fishing ground(60°W—61°W,45°S—47°S) and North fishing ground(57°W—58°W,41°S—42°S),the main length group of 1llex argentinus are respectively 20~21cm and 23~24cm; the main weight group of it are respectively 100~200g and >400g;
Finally, the models relative to squid fishing ground, time and 20℃ isotherm distribution are set up, which are as follows in the lon-gitude and latitude respectively: FGLong = 141.535 +1.8435 × T and FGLati = - 8.461 + 1.165× T+(Lat155 + Lat160)/2.
According to production statistics and resources monitoring data of light seine fishery on Minnan-Taiwan bank fishing ground(116°00′~119°30′E,22°00′~24°30′N)during 1987 to 2003 in Fujian, this paper studied and analyzed the status, developmental evolvement and utilization status of resources.
The average phytoplankton biomasses in 12 wintering ponds was 47.89 mg/L, comprosing 48.1% Chlorphyta, 19.3% Bacillariophyta, 13.2% Cryptophyta, 29.4% the others on Beidahu Fishery in Helan County, Ningxia.
According to the production database from March 2005 to January 2006 of Chinese trawler fishing vessels with the statistic format of 1°×1°,the plot is drawn by the software of Marine Explorer 4.0.Correlation of fishery distribution of jack mackerel versus SST is analyzed.
根据2005年3月至2006年1月我国大型拖网加工渔船在东南太平洋的生产资料,结合海表温数据,按经纬度1°×1°的空间单位进行分析,利用Marine Explorer 4.0软件作图,研究作业渔场CPUE分布与海表温的关系。
The spatial distribution of the fishing grounds of type Ⅰ,type Ⅱ,and type Ⅲ was between 5°S~5°N、140°E~180°,in which that of type Ⅲ stretched slightly towards the east in the Southern Hemisphere,and it also distributed in 10~5°S、155°~160°E.
The results were summarized as follows: (1) According to the position the above-mentioned fishing grounds can be divided into the north and the south fishing grounds, the north grounds are around 44°-45°N,156°-158°E,and the south around 41°-42°N,150°-151°E, with the former being larger than the latter in the scope of distribution;
The average biomass of Chaetognatha,Copepoda and Mysidacea was 9.18mg/m~3,2.32mg/m~3 and 1.38mg/m~3,respectively,and had close relation with the formation of fishing grounds,which may be considered as the indicator species for fishing grounds.
It shows that the main fishing grounds are distributed in the following three areas,12°N~13°N and 62°E~64°E,15°N~18°N and 59°E~62°E and 18°N~20°N 62°E~64°E,with the centers located at the boundaries where cold and warm waters meet and near cold cores.
To the highest CPUE of four fishing grounds, the temperature ranges are insignificantly different in different strata, the temperatures in 50 m, 75 m, and 100 m stratum are 3.00 ℃, 2.00 ℃ and 1.50 ℃ respectively
The temperature gradients in 0~ 50 m (50~ 100 m) strata of four fishing sub-grounds are 0.46 ℃/m(0.40 ℃/m), 0.36℃/m(0.14 ℃/m), 0.49 ℃/m(0.24 ℃/m), and 0.42 ℃/m(0.18 ℃/m)respectively.
The result shows that the fishing ground with high catch was focused at 26°~28°N and 122°~124°E for the southern region, and 32°~38°N and 123°~125°E for the northern region respectively.
The spatial distribution of the fishing grounds of type Ⅰ,type Ⅱ,and type Ⅲ was between 5°S~5°N、140°E~180°,in which that of type Ⅲ stretched slightly towards the east in the Southern Hemisphere,and it also distributed in 10~5°S、155°~160°E.
The result indicated that in South fishing ground(60°W—61°W,45°S—47°S) and North fishing ground(57°W—58°W,41°S—42°S),the main length group of 1llex argentinus are respectively 20~21cm and 23~24cm; the main weight group of it are respectively 100~200g and >400g;
Liaoning had a certain level of surplus in fishing ground (water area), mainly distributed in the coastal cities of Dalian, Panjin, Huludao, Yingkou, Jinzhou, and Dandong.
Growth increments of the male rock lobster Jasus lalandii vary systematically with location within a small (38 km2) fishing ground off the South African west coast.
However, comparisons between biomass values from the same depths in two different areas of the fishing ground suggested that biomass was higher in areas which were in proximity to shallow water, where extensive kelp beds were found.
The highest growth rate, primarily dependent on hydrological conditions, was observed in mussels from the Chupa Bay (Levin Navolok fishery), while the lowest rate was observed in mussels from the Umba region (Turii Cape, Murmansk Region).
The monthly anomalies of the catch structure for commercial categories, and the monthly relative importance of small, medium, and large shrimp show that the main cohort is recruited to the fishing grounds during October.
A fishery-independent survey of the spanner crab, Ranina ranina fishing grounds off the coast of New South Wales, Australia was completed in 1988-89 and repeated in 1997-98.
In a survey sponsored by the Ministry of Food, Agriculture and Forestry of the Federal Republic of Germany the mercury contamination of 759 specimens of fishes from the German fishing grounds were analysed.
As an example, the safe basins on the rolling initial value plane were constructed for a 30.27-meter-long fishing vessel according to different initial conditions and random wave parameters.