A massive invasion of the Neotropical calanoid copepod Arctodiaptomus dorsalis (Marsh, 1907) has been taking place in the Philippines since at least 1993. This copepod’s fecundity is known to depend on food concentration, increasing temperature appears to have detrimental effects on its hatching success and survivorship, but parameters that are truly predictive of the successful integration and propagation of this species in particular bodies of water have not yet been identified. We conducted a spatial analysis of morphometric features and reproductive capacity, the latter proxied by clutch size (CS), of different populations of A. dorsalis inhabiting 11 tropical lakes in the Philippines. Correlations between either morphometry or CS and selected water quality parameters were investigated based on collections and measurements made from December 2018 to April 2019. Means of morphometric measurements differed significantly (P < 0.001) among the populations of A. dorsalis in all lakes. Total length (TL) of adult males, TL of non-ovigerous adult females, and CS of ovigerous females all showed significant (P < 0.001) inverse correlations with lake depth, accounting for about 30% of the observed variability among lakes (r = –0.55, –0.55, and –0.58, respectively). Shallow lakes, which are more homogenous in terms of nutrient distribution throughout the water column, thus provide a more suitable habitat than deep lakes for A. dorsalis and provides a partial explanation of the widespread occurrence and abundance of the species in the shallower, more eutrophic lakes in the Philippines.

中文翻译：

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深度和生产力是菲律宾热带湖泊广泛入侵弧形Arctodiaptomus dorsalis（Marsh，1907）（Copepoda：Calanoida）的预测参数

新热带Calanoid pe足类Arctodiaptomus dorsalis（至少从1993年开始，菲律宾就开始于1907年的沼泽（Marsh，1907年）。众所周知，这种co足类的繁殖力取决于食物的浓度，温度升高似乎对其孵化成功率和存活率有不利影响，但参数确实可以预测成功尚未确定该物种在特定水域中的整合和繁殖。我们进行了空间形态特征和生殖能力的空间分析，后者由不同大小的背心种群的离体大小（CS）代表。居住在菲律宾的11个热带湖泊中。根据2018年12月至2019年4月进行的收集和测量，研究了形态学或CS与选定水质参数之间的相关性。在所有湖泊中，背心种群的形态学测量平均值差异显着（P <0.001）。成年男性的总长度（TL），成年女性的TL和成年女性的CS均显着（P<0.001）与湖泊深度成反比，约占所观察到的湖泊间变化的30％（r分别为–0.55，–0.55和–0.58）。浅水湖泊在整个水柱中的营养分布更均一，因此比深水湖泊提供了更适合于背背湖泊的栖息地，并部分解释了该物种在较浅，富营养化的环境中的广泛存在和丰富性菲律宾的湖泊。