浙江南部近岸海域春季龙头鱼生物量的时空分布

Spatial-Temporal Distribution of the Biomass of Harpodon nehereus in the Coastal Area of South Zhejiang During Spring

根据2011年春季(4月、5月与6月)对浙江南部近岸海域进行的共3个航次的底拖网调查数据,对该海域龙头鱼生物量的时空分布进行了分析。结果表明:4月的生物量显著高于5月与6月(P<0.05);相对高生物量区4月主要分布于机轮拖网禁渔区线附近的中部调查海域,5月与6月则分布于靠近大陆岸线的中北部调查海域;4-6月生物量重心呈逐月向西移动的趋势;生物量的时空分布与底温有关,4月、5月与6月的适宜底温分别为12.00～13.00℃、15.00～16.00℃与19.00～20.00℃。

Based on three surveys carried out by bottom trawl in spring（April, May and June） of 2011, the spatial-temporal distribution of the biomass of Harpodon nehereus in the coastal area of south Zhejiang was analyzed. The results indicated that： The biomass in April was significantly high compared with it in May and June, respectively（P〈0.05）. The area of relatively higher biomass located in the middle party waters close to the forbidden fishing line for trawls in April, and located in the middle-north party waters close to the seashore in May and June, respectively. The biomass center trended westward from April to June. The spatial-temporal distribution of the biomass of H. nehereus was related to the sea bottom water temperature, and the suitable temperature extension of April, May and June was 12.00-13.00 ℃, 15.00-16.00 ℃ and 19.00-20.00 ℃, respectively.