Milyeringa veritas (Eleotridae), a remarkably versatile cave fish from the arid tropics of northwestern Australia
Milyeringa veritas (Eleotridae), a remarkably versatile cave fish from the arid tropics of northwestern Australia
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DOI：
10.1023/a:1011880726946
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发表时间：
2001-10-01
影响因子：
1.4
通讯作者：
Humphreys, WF
中科院分区：
文献类型：
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作者：
Humphreys, WF
盲孔鱼 Milyeringa veritas 仅限于澳大利亚西北部开普岭和巴罗岛的地下水。它出现在淡水洞穴和近岸系统的海水中。它与澳大利亚唯一的其他地穴脊椎动物、盲穴鳗鱼、世界上最长的洞穴鱼 Ophisternon candidum 以及由具有“特提斯”足迹和广泛不连续分布的谱系组成的多样化地穴动物群有关，通常来自北大西洋洞穴。洞穴鱼栖息在干旱地区中新世石灰岩发育的喀斯特湿地中。尽管这种洞穴鱼被《西澳大利亚野生动物保护法》列为受威胁物种，但有关这种洞穴鱼的基本生物学信息几乎完全缺乏。等位酶频率和分布表明开普岭半岛上存在显着的种群亚结构，使得这些种群在遗传上基本上是隔离的，这表明存在不止一种生物物种。此外，他们认为替代事件可能与一系列海平面上升的低水平有关。对肠道内容物的分析表明，它们是机会性捕食者，捕食被困在水中的暗底动物和意外动物，至少在暴露于水面的采样点是这样，这一结论得到了稳定同位素比分析结果的支持。淡水洞穴和整个深安奇阿林系统中都发现了这些鱼，它们出现在垂直分层的水柱中，其中存在水化学成分的多峰分布（温度、pH、盐度、溶解氧、氧化还原、溶解无机氮系列、硫化氢）。
The blind cave gudgeon Milyeringa veritas is restricted to groundwaters of Cape Range and Barrow Island, northwestern Australia. It occurs in freshwater caves and in seawater in anchialine systems. It is associated with the only other stygobitic cave vertebrate in Australia, the blind cave eel, Ophisternon candidum, the world's longest cave fish, and a diverse stygofauna comprising lineages with 'tethyan' tracks and widely disjunct distributions, often from North Atlantic caves. The cave gudgeon inhabits a karst wetland developed in Miocene limestones in an arid area. There is an almost complete lack of information on the basic biology of this cave fish, despite it being listed as threatened under the Western Australian Wildlife Conservation Act. Allozyme frequencies and distributions indicate significant population sub-structuring on the Cape Range peninsula such that the populations are essentially isolated genetically suggesting that more than one biological species is present. Further, they suggest that the vicariant events may have been associated with a series of eustatic low sealevels. Analysis of intestinal contents indicates that they are opportunistic feeders, preying on stygofauna and accidentals trapped in the water, at least at the sites sampled which were open to the surface, a conclusion supported by the results of stable isotope ratio analysis. The gudgeons are found in freshwater caves and throughout deep anchialine systems in which they occur in vertically stratified water columns in which there is a polymodal distribution of water chemistries (temperature, pH, salinity, dissolved oxygen, redox, dissolved inorganic nitrogen series, hydrogen sulphide).