南极半岛北部水域南极磷虾抱卵雌体基础生物学比较研究

根据2010年1月23日-2月13日在南极半岛北部水域开展的南极海洋生物资源调查期间收集的数据，对南极磷虾抱卵雌体基础生物学的空间变化进行了分析。结果表明：（1）AR 3区体长范围及平均体长均大于AR 1和AR 2区。3个研究小区体长和壳长分布存在显著性差异，AR 1和AR 2区壳长范围和平均壳长较为接近，但AR 3区平均壳长大于AR 1和AR 2区。（2）AR 1和AR 2区的南极磷虾抱卵雌体体长与壳长关系不存在显著性差异，但AR 1区和AR 2区与AR 3之间则存在显著性差异。（3）AR 1平均体重较另两个区大，AR 2区最小，3个研究小区的体重范围均有所差异，且体重分布及体长—体重关系存在显著性差异。（4）AR 1和AR 2区摄食等级较为相似，Ⅰ级的比例较高，Ⅱ级至Ⅳ级比例依次减少；AR 3区Ⅰ级的比例也最高，但Ⅱ级和Ⅳ级的比例相当，Ⅲ级比例相对较低。3个研究小区摄食等级存在显著性差异。本研究结果可为开发南极磷虾资源提供基础数据，并为南极磷虾的补充状况提供参考。

Comparative study on Antarctic krill (Euphausia superba) in gravid stage in the northern Antarctic Peninsula

Based on the data collected from the northern Antarctic Peninsula from January 23 to February 13,2010.with supporting by Antarctic Marine Living Resource Survey Programme,the present study compared the biology of Antarctic Krill(Euphausia superba) in the gravid stage(KRI-G).The results showed that:(1) SL range and average SL of KRI-G in AR 3 is greater than that of AR 1 and AR 2.Significant difference can be found for standard length(LS) and carapace length(LC) distribution of KRI-G among 3 study subareas.The CL range and average CL are similar for the KRI-G between AR 1 and AR 2,but the values in AR 3 are greater than that of AR 1 and AR 2.(2) The LC-LS relationship is not different significantly between AR 1 and AR 2,however,remarkable difference can be found between AR 3 and AR 1 or AR 2.(3) The average WW of KRI-G in AR 1 is greater than AR 2 and AR 3 and the value in AR 2 is at lowest level.Different range can be found for the wet weight of KRI-G among study subareas and significant difference can be found on WW distribution and the LS-WW relationship.(4) The feeding intensity is similar between AR 1 and AR 2,i.e.,the proportion of stage Ⅰ is highest and decreasing trend can be found from stage Ⅱ to stage Ⅳ.Although the proportion of stage Ⅰ is highest in AR 3,the similar proportion can be found for stage Ⅱ and stage Ⅳ,and the value is lower for stage Ⅲ.Remarkable difference can be found for the feeding intensity of KRI-G among 3 study subareas.The present study can provide basic data for exploiting Antarctic krill resources and a reference for recruitment status of Antarctic krill.