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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。研究亮点:南极磷虾在南极生态系统中占有特殊地位。作为游泳能力较弱的生物,掌握处于抱卵阶段的南极磷虾群体空间变化可为分析该资源的补充机制提供基础数据。本研究以南极半岛北部水域南极磷虾抱卵雌体为对象对其基础生物学空间差异进行研究,结果可为研究南极磷虾的补充状况提供参考。
Based on data collected during the Antarctic Marine Living Resource Survey conducted from January 23 to February 13, 2010 in the northern Antarctic Peninsula, the spatial variability of the basal biology of laying eggs in Antarctic krill was analyzed. The results showed that: (1) The body length and average body length of AR 3 were greater than that of AR 1 and AR 2. There were significant differences in body length and shell length among the three study areas. The shell length and average shell length of AR 1 and AR 2 were similar, but the average shell length of AR 3 was longer than that of AR 1 and AR 2. (2) There was no significant difference in the relationship between body length and shell length of Antarctic krill in AR 1 and AR 2 regions, but there was a significant difference between AR 1 and AR 2 regions and AR 3. (3) The mean body weight of AR 1 was larger than that of the other two regions, while the area of AR 2 was the smallest. The body weight range of the three study areas was different, and there was a significant difference in weight distribution and body length-body weight relationship. (4) The food intake of AR 1 and AR 2 was similar, with a higher proportion of grade Ⅰ and a lower proportion of grade Ⅱ to Ⅳ; the highest grade Ⅰ of AR 3, but a similar proportion of grade Ⅱ and Ⅳ, Ⅲ-level ratio is relatively low. There was a significant difference in feeding grade among the three study areas. The results of this study can provide the basic data for the development of Antarctic krill resources and provide reference for the supplement status of Antarctic krill. Research highlights: Antarctic krill occupies a special place in the Antarctic ecosystem. As a creature with weaker swimming ability, grasping the spatial variation of the Antarctic krill population in the stage of spawning can provide the basic data for analyzing the supplementary mechanism of this resource. In this study, Antarctic krill somatic embryos held in the northern Antarctic peninsula were used to study the difference of their basic biological space. The results may provide references for the study of the supplementation of Antarctic krill.