The male reproductive strategy of a deep-sea squid: sperm allocation, continuous production, and long-term storage of spermatophores in Histioteuthis miranda
The male reproductive strategy of a deep-sea squid: sperm allocation, continuous production, and long-term storage of spermatophores in Histioteuthis miranda
复制标题
深海鱿鱼的雄性繁殖策略：Histioteuthis miranda 的精子分配、持续生产和精囊的长期储存
DOI：
10.1093/icesjms/fsq041
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发表时间：
2010
影响因子：
3.3
通讯作者：
Lammertjan Dam
中科院分区：
文献类型：
--
作者：
H. Hoving;M. Lipiński;Lammertjan Dam
鱿鱼是半生性生物。我们对鱿鱼繁殖的了解很大程度上与雌性有关，因为很少有研究针对雄性，尽管雄性也同样受到半生殖的挑战，但实际上我们仍然不知道鱿鱼进化出了什么策略来将精子分配给精原细胞。为了研究深海鱿鱼Histioteuthis Miranda的雄性生殖策略，描述了在头足类动物中独一无二的雄性生殖解剖结构，并对精囊的产生和精子分配进行了量化。该物种在相当长的一段持续的体细胞生长过程中产生和储存精荚。个体大小与精荚长度(SPL)呈正相关，单个个体储存的精荚大小差异达270%。个体在其生殖系统内有136至2276个精细胞，精细胞可储存长达4.5个月。SPL与每个精原细胞的精子质量呈多项式关系，表明较大的精原细胞不一定含有更多的精子。米兰达鱼独特的雄性形态以及精荚的持续生产和长期储存似乎允许该物种增加繁殖的窗口，这一策略在深海环境中可能是有价值的。
Squid are semelparous organisms. Much of what we know about squid reproduction relates to females, because few studies have addressed males and, although males are similarly challenged by semelparity, it remains virtually unknown what tactics squid have evolved to allocate sperm to spermatophores. The male reproductive strategy of the deep-sea squid Histioteuthis miranda was examined by describing the male reproductive anatomy, which appears unique among cephalopods, and by quantifying spermatophore production and sperm allocation. The species produces and stores spermatophores over a considerable period of continuous somatic growth. Body size and spermatophore length (SpL) are positively correlated, and the size difference between spermatophores stored by a single individual was up to 270%. Individuals had between 136 and 2276 spermatophores inside their reproductive system, and spermatophores may be stored for as long as 4.5 months. The relationship between SpL and the mass of sperm per spermatophore was polynomial, demonstrating that larger spermatophores did not necessarily contain more sperm. The unique male morphology and the continuous production and long-term storage of spermatophores in H. miranda seem to allow the species to increase the window in which reproduction can take place, a strategy that may be valuable in the deep-sea environment.