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首页> 外文期刊>Parasitology >Consequences of microhabitat selection for reproductive success in the parasitic copepod Neobrachiella spinicephala (Lernaeopodidae).
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Consequences of microhabitat selection for reproductive success in the parasitic copepod Neobrachiella spinicephala (Lernaeopodidae).

机译：微生境选择的结果，在寄生br足类新孢子虫新头孢菌（Lernaeopodidae）中繁殖成功。

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SUMMARY: Narrow site specificity in parasites is assumed to be associated with fitness benefits, such as higher reproductive success, although this is never quantified. We linked the body mass and combined mass of egg sacs of female copepods, Neobrachiella spinicephala, parasitic on the sandperch, Pinguipes brasilianus, to attachment sites on the host. Adult females attach permanently either on the lips, the margins of the operculum, or the base of pectoral or pelvic fins. In addition to influences of sampling site, season and host body length, our analyses revealed important fitness effects. First, attachment site significantly influenced copepod body mass; independent of other factors, copepods at the base of fins were 32% larger than those on the lips or operculum. Second, the mass of egg sacs was almost always greater if the copepod was attached at the base of fins rather than to the lip or operculum. Thus, a female weighing 6 mg would, on average, produce 40% larger egg sacs if attached to the base of fins. However, copepods were much more likely to attach at the base of fins on small fish, and on either the lip or the operculum on large fish. We propose that constraints varying with fish size account for the shift from optimal to suboptimal attachment sites as a function of increasing host size. By measuring differences in fitness components between attachment sites, our approach allows hypothesis testing regarding microhabitat selection.
机译：总结：寄生虫中狭窄的位点特异性被认为与健康益处相关，例如更高的生殖成功率，尽管这从未被量化。我们将雌性pe足类（Neobrachiella spinicephala）的卵囊的体重和合并质量与寄主的附着位点联系起来，这些卵囊寄生在沙per（Pinguipes brasilianus）上。成年雌性永久附着在嘴唇，the盖的边缘或胸鳍或骨盆鳍的根部。除了采样地点，季节和宿主体长的影响外，我们的分析还显示出重要的健身效果。首先，附着部位显着影响co足类动物的体重。不受其他因素的影响，鳍足底部的co足类动物比嘴唇或盖的足足类动物大32％。其次，如果co足足附着在鳍的底部而不是唇或or，则卵囊的质量几乎总是更大。因此，体重为6毫克的雌性如果附着在鳍的底部，平均会产生40％更大的卵囊。然而，co足类更可能附着在小鱼的鳍的底部，以及大鱼的唇或盖上。我们建议，随着鱼的大小而变化的约束条件说明，随着寄主大小的增加，从最佳附着点到次佳附着点的转变。通过测量附着点之间健身成分的差异，我们的方法可以进行关于微生境选择的假设检验。

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