Latitudinal variation in the reproductive biology of the burrowing ghost shrimp Callianassa filholi (Decapoda: Thalassinidea)
Latitudinal variation in the reproductive biology of the burrowing ghost shrimp Callianassa filholi (Decapoda: Thalassinidea)
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DOI：
10.1007/s002270050709
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发表时间：
2000-04-01
期刊：
影响因子：
2.4
通讯作者：
Rowden, AA
中科院分区：
文献类型：
--
作者：
Berkenbusch, K;Rowden, AA
在繁殖季节，对新西兰各地沿纬度梯度的穴居幽灵虾 Callianassa filholi Milne-Edwards, 1878 的种群结构和繁殖生态学进行了研究。大小频率分布揭示了单峰种群，主要是性成熟的虾。所有种群都表现出公正的性别比例，并且性别之间的体型（甲壳长度，CL）似乎没有显着差异。同时，不同种群之间的 CL 和成熟尺寸存在显着差异；然而，在整个研究的纬度范围内，从北到南尺寸的总体增加并不一致。不同种群的繁殖周期时间存在显着差异，南方种群的繁殖开始时间较早。每个地点的胚胎数量（繁殖力）随着雌性 CL 的增加呈线性增加，但不同群体之间的比率存在显着差异。胚胎大小与胚胎数量无关，前者随纬度的增加而显着增加。除胚胎大小外，观察到的 C. filholi 群体之间体型/成熟时大小和繁殖时间的差异被认为是由食物供应而不是温度决定的。因此，建议对海藻生殖生物学的这些方面进行进一步的研究。
Population structure and reproductive ecology of the burrowing ghost shrimp Callianassa filholi Milne-Edwards, 1878 were studied in populations along a latitudinal gradient throughout New Zealand during the breeding season. Size-frequency distributions revealed unimodal populations, with predominantly sexually mature shrimp. All populations showed an unbiased sex-ratio, and there appeared to be no significant difference in size (carapace length, CL) between sexes. At the same time, CL and size at maturity differed significantly between populations; however, a general increase in sizes from north to south was not consistent throughout the latitudinal range studied. The timing of the breeding cycle differed significantly between populations, and breeding started earlier in southern populations. Number of embryos (fecundity) increased linearly with female CL at each location, but rates differed significantly between populations. Embryo size was not related to number of embryos, and the former increased significantly with latitude. With the exception of embryo size, observed differences in body size/size at maturity and reproductive timing between C. filholi populations are thought to be determined by food availability rather than temperature. Thus, further study is suggested on these aspects of thalassinid reproductive biology.