THE COMPOUND EYE AS AN INDICATOR OF AGE AND SHRINKAGE IN ANTARCTIC KRILL

	THE COMPOUND EYE AS AN INDICATOR OF AGE AND SHRINKAGE IN ANTARCTIC KRILL
	SUN, S; DELAMARE, W; NICOL, S
	1995
发表期刊	ANTARCTIC SCIENCE
ISSN	0954-1020
卷号	7 期号:4 页码:387-392
摘要	Laboratory studies have shown that Antarctic krill (Euphausia superba) shrink if maintained in conditions of low food availability. Recent studies have also demonstrated that E. superba individuals may be shrinking in the field during winter. If krill shrink during the winter, conclusions reached by length-frequency analysis may be unreliable because smaller animals may not necessarily be younger animals. In this study, the correlation between the body-length and the crystalline cone number of the compound eye was examined. Samples collected in the late summer show an apparent linear relationship between crystalline cone number and body-length. From a laboratory population, it appears that when krill shrink the crystalline cone number remains relatively unchanged. If crystalline cone number is little affected by shrinking, then the crystalline cone number may be a more reliable indicator of age than body-length alone. The ratio of crystalline cone number to body-length offers a method for detecting the effect of shrinking in natural populations of krill. On the basis of the crystalline cone number count, it appears from a field collection in early spring that E. superba do shrink during winter.
关键词	Euphausia-superba Dana Thysanoessa-inermis Kroyer Meganyctiphanes-norvegica Body Shrinkage Growth Bay Maturation Population Longevity Raschi
学科领域	Environmental Sciences ; Geography, Physical ; Geosciences, Multidisciplinary
收录类别	sci
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/2876
专题	海洋生态与环境科学重点实验室
推荐引用方式 GB/T 7714	SUN, S,DELAMARE, W,NICOL, S. THE COMPOUND EYE AS AN INDICATOR OF AGE AND SHRINKAGE IN ANTARCTIC KRILL[J]. ANTARCTIC SCIENCE,1995,7(4):387-392.
APA	SUN, S,DELAMARE, W,&NICOL, S.(1995).THE COMPOUND EYE AS AN INDICATOR OF AGE AND SHRINKAGE IN ANTARCTIC KRILL.ANTARCTIC SCIENCE,7(4),387-392.
MLA	SUN, S,et al."THE COMPOUND EYE AS AN INDICATOR OF AGE AND SHRINKAGE IN ANTARCTIC KRILL".ANTARCTIC SCIENCE 7.4(1995):387-392.

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