Reproduction and Development in Halocaridina rubra Holthuis, 1963 (Crustacea: Atyidae) Clarifies Larval Ecology in the Hawaiian Anchialine Ecosystem
Reproduction and Development in Halocaridina rubra Holthuis, 1963 (Crustacea: Atyidae) Clarifies Larval Ecology in the Hawaiian Anchialine Ecosystem
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Halocaridina rubra Holthuis 的繁殖和发育，1963 年（甲壳纲：Atyidae）阐明了夏威夷 Anchialine 生态系统中的幼虫生态学
DOI：
10.1086/bblv229n2p134
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
S. R. Santos
中科院分区：
文献类型：
--
作者：
Justin C. Havird;Rebecca C. Vaught;D. Weese;S. R. Santos
水生生境中的幼虫通常在不同于成虫的环境中发育。虾科虾体现了这一趋势，因为许多物种的幼虫需要咸水或微咸水才能发育，而成虫则适应淡水。 Atyidae家族中的一个例外是“anchialine clade”，它们成年后是广盐性的，是受地下淡水和海水影响的栖息地的特有种。尽管夏威夷 anchialine atyid Halocaridina rubra 是一种强大的渗透压调节剂，但其幼虫从未在自然界中观察到。此外，对 anchialine 物种的幼虫发育研究很少。此处，展示了 H. rubra 的 7 个遗传谱系和一个混合群体在 5 年时间内实验室群体的繁殖趋势；还讨论了不同盐度下幼虫的存活率。幼虫的存在和数量在不同谱系之间存在显着差异，其中混合种群的数量最多。还发现了季节性造成的繁殖统计差异。在盐度接近淡水的情况下，幼虫的存活率最低（12% 的沉降率），而在咸水和海水中则显着较高（分别为 88% 和 72%）。与这一发现相关的是，可识别的具有离子运输能力的鳃直到变态为幼体时才发育。因此，H. rubra 的早期生命阶段显然被排除在地表水中，其特点是盐度较低且波动。相反，这些阶段仅限于夏威夷近岸栖息地的地下（那里有更高和更稳定的盐度）部分，因为它们无法忍受低盐度。总而言之，这些数据有助于近岸生态系统中幼虫生态学的研究。
Larvae in aquatic habitats often develop in environments different from those they inhabit as adults. Shrimp in the Atyidae exemplify this trend, as larvae of many species require salt or brackish water for development, while adults are freshwater-adapted. An exception within the Atyidae family is the “anchialine clade,” which are euryhaline as adults and endemic to habitats with subterranean fresh and marine water influences. Although the Hawaiian anchialine atyid Halocaridina rubra is a strong osmoregulator, its larvae have never been observed in nature. Moreover, larval development in anchialine species is poorly studied. Here, reproductive trends in laboratory colonies over a 5-y period are presented from seven genetic lineages and one mixed population of H. rubra; larval survivorship under varying salinities is also discussed. The presence and number of larvae differed significantly among lineages, with the mixed population being the most prolific. Statistical differences in reproduction attributable to seasonality also were identified. Larval survivorship was lowest (12% settlement rate) at a salinity approaching fresh water and significantly higher in brackish and seawater (88% and 72%, respectively). Correlated with this finding, identifiable gills capable of ion transport did not develop until metamorphosis into juveniles. Thus, early life stages of H. rubra are apparently excluded from surface waters, which are characterized by lower and fluctuating salinities. Instead, these stages are restricted to the subterranean (where there is higher and more stable salinity) portion of Hawaii’s anchialine habitats due to their inability to tolerate low salinities. Taken together, these data contribute to the understudied area of larval ecology in the anchialine ecosystem.
Remipedia（甲壳纲）的胚胎后发育——额外的结果和新的见解
影响因子：
2.4
作者：
Koenemann;Olesen;Iliffe;Hoenemann;Ungerer;Scholtz
通讯作者：
Scholtz