调查河口棘鱼种群甲壳覆盖率与寄生虫感染之间的关系。

Q2 Agricultural and Biological Sciences
Evolutionary Ecology Research Pub Date : 2019-01-01
Meghan F Maciejewski, Catherine A Hernandez, Daniel I Bolnick
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引用次数: 0

摘要

背景:当三刺棘鱼在淡水中定居时,它们通过Eda等位基因频率的变化反复进化出减少的盔甲。这种进化通常归因于海洋和淡水环境之间不同的捕食压力。然而,含有Eda的染色体区域与许多其他表型有关,包括学校教育、反捕食者行为和免疫。因此,甲层的进化可能是由作用于Eda或相关基因的多重选择压力驱动的。问:寄生虫感染与甲型相关吗?假设:棘鱼甲板形态的寄生虫负荷不同。生物:三刺棘鱼的甲多态种群及其寄生虫。实地考察地点:2009年6月和2012年6月,我们在温哥华岛坎贝尔河河口的一个人工盐沼池中采集了棘鱼样本。方法:每年对大约100条鱼的大寄生虫进行计数,并对侧甲板进行计数。我们使用广义线性模型来检验盔甲形态和寄生虫负荷之间的相关性。结果:大多数寄生虫种类与甲壳无关。在这两年中,鳃寄生虫在全副甲壳的鱼身上的数量都更多。线虫也表现出微显著的正趋势。如果寄生感染降低了棘鱼的适应性,那么这种盔甲与感染之间的正协方差将加速在淡水中定居的棘鱼盔甲的丧失。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Investigating the association between armour coverage and parasite infection in an estuarine population of stickleback.

Investigating the association between armour coverage and parasite infection in an estuarine population of stickleback.

Investigating the association between armour coverage and parasite infection in an estuarine population of stickleback.

Investigating the association between armour coverage and parasite infection in an estuarine population of stickleback.

Background: When threespine stickleback colonized fresh water, they repeatedly evolved reduced armour plating via changes in Eda allele frequency. This evolution is typically attributed to differential predation pressure between marine and freshwater environments. However, the chromosomal region containing Eda is associated with many other phenotypes, including schooling, antipredator behaviour, and immunity. Consequently, the evolution of armour plating may be driven by multiple selective pressures acting on Eda or linked genes.

Question: Is parasite infection associated with armour phenotype?

Hypothesis: Parasite load differs between stickleback armour plate morphs.

Organisms: An armour-polymorphic population of threespine stickleback (Gasterosteus aculeatus), and their parasites.

Field site: In June 2009 and 2012, we sampled stickleback from a single human-made salt-marsh pool in the Campbell River Estuary on Vancouver Island.

Methods: We counted macroparasites on approximately 100 fish per year and counted lateral armour plates. We used generalized linear models to test for correlations between armour morph and parasite load.

Results: Most parasite species were not associated with armour. The gill parasite Thersitina was more abundant on more fully armoured fish in both years. The nematode Eustrongylides also exhibited a marginally significant positive trend. If parasitic infections reduce stickleback fitness, this positive covariance between armour and infection would accelerate the loss of armour plating in stickleback colonizing fresh water.

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来源期刊
Evolutionary Ecology Research
Evolutionary Ecology Research 生物-进化生物学
自引率
0.00%
发文量
0
审稿时长
>12 weeks
期刊介绍: Evolutionary Ecology Research publishes original research contributions focusing on the overlap between ecology and evolution. Papers may treat any taxon or be general. They may be empirical, theoretical or a combination of the two. EER prefers conceptual contributions that take intellectual risks or that test ideas.
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