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首页> 外文期刊>Marine ecology progress series >Testing the reproductive benefits of aggregation: the limpet Patella vulgata shows no evidence of synchrony in gonad development
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Testing the reproductive benefits of aggregation: the limpet Patella vulgata shows no evidence of synchrony in gonad development

机译：测试聚集的生殖益处：Pat虫没有表现出性腺发育同步的证据

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摘要

Group living is ubiquitous, yet causal explanations are not fully tested. Evidence for a reduction in predation risk is clear, and there is support for reduction of risk from the abiotic environment. Potential reproductive benefits are less well understood, especially for non-lekking, externally fertilising animals which form medium-term aggregations. We used Patella vulgata to test the model that a reproductive benefit is derived from aggregation. We sampled grouped and solitary limpets fortnightly, from the point at which individuals were in a neuter state to the stage where the population was near spawning. Whilst aggregation increased overall as the population neared spawning, there was no difference between aggregated and solitary limpets in terms of sex ratio. There was also no difference in variability of gonad development between solitary and grouped animals, which means no synchrony in gonad development was necessary for externally fertilising animals to gain a benefit from aggregating. We suggest that causal explanations for an increase in limpet aggregation from autumn to winter are most likely to lie in the interaction of reduced grazing activity and increased predation pressure. Since limpets are a key component of rocky shore systems, understanding the processes determining their spatial arrangement has implications for our understanding of rocky shores.
机译：小组生活无处不在，但因果关系的解释尚未得到充分检验。减少捕食风险的证据很明确，并且支持减少非生物环境的风险。人们对潜在的生殖效益了解得很少，特别是对于形成中期聚集的非韭菜外受精动物。我们使用Pat菜来测试该模型从聚集中获得生殖效益。从个人处于中性状态到种群接近产卵的阶段，我们每两周对成组的和孤立的帽贝进行采样。总体上随着种群接近产卵而增加，但按性别的比例，聚集的和孤立的帽贝之间没有差异。在单独和成群的动物之间，性腺发育的变异性也没有差异，这意味着外部受精的动物从聚集中受益并不需要性腺发育的同步。我们认为，从秋季到冬季，帽贝聚集增加的原因解释最有可能在于放牧活动减少和捕食压力增加之间的相互作用。由于帽贝是岩石海岸系统的关键组成部分，因此了解确定其空间布置的过程会对我们对岩石海岸的理解产生影响。

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