Comparing the reproductive biology of three “marsupial”, eu‐viviparous gastropods (Cerithioidea, Thiaridae) from drainages of Australia's monsoonal north
Comparing the reproductive biology of three “marsupial”, eu‐viviparous gastropods (Cerithioidea, Thiaridae) from drainages of Australia's monsoonal north
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比较来自澳大利亚季风北部排水系统的三种“有袋动物”、真胎生腹足动物（Cerithioidea、Thiaridae）的生殖生物学
DOI：
10.1002/zoos.201200023
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发表时间：
2012
影响因子：
2
通讯作者：
Glaubrecht
中科院分区：
文献类型：
--
作者：
Glaubrecht
在软体动物中，正如在其他动物中经常发现的那样，实现了两种不同的生殖模式，即卵生和胎生。后者经常出现在淡水腹足类的各种谱系中，其中包括“有袋动物”Thiaridae，分布在包括澳大利亚在内的泛热带。在这里，发现该科至少包括11种，其中5种是该大陆特有的。这两个高度局限于只有中央北方的大多数地区，即Melasma onca和Sermyla venustula。相比之下，“Thiara”australis揭示了在澳大利亚的季风热带更广泛的范围。这三个thiarids的育儿袋内容进行了分析，以推断其生殖方式的细节有关的地理起源的个人群体，季节性和生物统计学的外壳。我们发现，所有三种thiarids的生殖模式存在明显的物种特异性差异，M.与S相比，在育儿袋中有更多的后代。venustula和“Thiara”australis。与此同时，它的后代较小，孵化的幼仔不如后两个物种先进。此外，我们报告了前两个物种基于排水的种内差异。因此，罗珀河的上游地区，排水到卡奔塔利亚湾，显然提供了更好的环境条件，允许bothM. oncaandS.与两个物种分布区内其他水系的群体相比，venustulato产生更多的后代，壳高度增加。我们建议，根据早期的研究，区分不止一种模式内eu胎生的繁殖策略thiarids。研究各种因素的影响，可能与种间以及种内的差异，在其生殖生物学，如女性壳的大小和排水特定的栖息地，我们表明，澳大利亚thiarids是更灵活和适应性比以前已知的（© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA，魏因海姆）
In molluscs, as often found also among other groups of animals, two distinct reproductive modes are realised, viz. oviparity and viviparity. The latter frequently occurs in various lineages of freshwater gastropods, among them the “marsupial” Thiaridae with a pantropical distribution including Australia. Here the family was found to comprise at least 11 species, of which five are endemic to the continent. Of those two are highly restricted to only the central northern most region, viz.Melasma oncaandSermyla venustula.In contrast, “Thiara” australisreveals a wider range in Australia’s monsoon tropics. Brood pouch contents of these three thiarids are analysed here in order to infer details of their reproductive modes in relation to the geographic origin of individual populations, seasonality and the biometry of their shells. We found pronounced species‐specific differences in the reproductive modes of all three thiarids, withM. oncahaving significantly more progeny in the brood pouch compared toS. venustulaand“Thiara” australis. At the same time, its progeny are smaller and hatchlings are less advanced than in the latter two species. In addition, we report drainage‐based intraspecific differences in the first two species. Accordingly, the head‐water region of the Roper River, which drains into the Gulf of Carpentaria, apparently provides better environmental conditions that allow bothM. oncaandS. venustulato produce more progeny with an increased shell height as compared to popoulations from other drainages within the two species’ ranges. We suggest, in accordance with earlier studies, to differentiate more than only one mode within eu‐viviparous reproductive strategies in thiarids. Studying the influence of various factors potentially correlated with interspecific as well as intraspecific differences in their reproductive biology, such as female shell size and drainage specific habitat, we show that Australian thiarids are more flexible and adaptable than previously known (© 2012 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
影响因子：
0.5
作者：
Glaubrecht, Matthias
通讯作者：
Glaubrecht, Matthias
影响因子：
2
作者：
Glaubrecht, Matthias;Brinkmann, Nora;Poeppe, Judith
通讯作者：
Poeppe, Judith