River Flow Regime Predicts Life History Traits in Poeciliid Fish

IF 1.6 3区农林科学 Q3 FISHERIES

Ecology of Freshwater Fish Pub Date : 2025-06-06 DOI:10.1111/eff.70012

Raphaela Batista dos Santos, Luciana Lameira dos Santos, Romullo Guimarães de Sá Ferreira Lima, Bruno Eleres Soares, Carla Ferreira Rezende, José Roberto Feitosa Silva

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引用次数: 0

Abstract

Life history theory seeks to explain how the environment shapes life history traits. Based on this theory, we expected that Poecilia vivipara in rivers with intermittent and perennial flow regimes would show differences in maturation and reproductive investment. We sampled specimens from two rivers in the Brazilian semi-arid region with these contrasting river flow regimes. One is intermittent, where the flow ceases during the dry season and fish populations become confined to isolated pools on the riverbed, and the other is artificially perennial with continuous flow. We predicted that females would mature earlier and invest more in reproduction in the intermittent river than in the perennial river. Our findings supported the predictions; river intermittency apparently has shaped the traits of P. vivipara in natural environments as contrasted with those affected by anthropogenic alterations. Further study is needed to investigate whether these traits reflect genetic differences or phenotypic plasticity.

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河流流量状况预测水蛭类鱼类的生活史特征

生命史理论试图解释环境如何塑造生命史特征。基于这一理论，我们预计在间歇流和多年流的河流中，胎生雌虫在成熟和生殖投资方面存在差异。我们从巴西半干旱地区的两条河流中采集了这些对比鲜明的河流流量。一种是间歇性的，在旱季水流停止，鱼类种群被限制在河床上孤立的水池中，另一种是人工多年生的，水流连续。我们预测断续河流中的雌性比多年生河流中的雌性成熟得更早，并且在繁殖方面投入更多。我们的发现支持了这些预测；河流的间断性明显地塑造了自然环境下的胎生假蝇的特征，而不是受人为改变的影响。这些性状反映的是遗传差异还是表型可塑性，有待进一步研究。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Ecology of Freshwater Fish 农林科学-海洋与淡水生物学

CiteScore

4.10

自引率

0.00%

发文量

审稿时长

12-24 weeks

期刊介绍： Ecology of Freshwater Fish publishes original contributions on all aspects of fish ecology in freshwater environments, including lakes, reservoirs, rivers, and streams. Manuscripts involving ecologically-oriented studies of behavior, conservation, development, genetics, life history, physiology, and host-parasite interactions are welcomed. Studies involving population ecology and community ecology are also of interest, as are evolutionary approaches including studies of population biology, evolutionary ecology, behavioral ecology, and historical ecology. Papers addressing the life stages of anadromous and catadromous species in estuaries and inshore coastal zones are considered if they contribute to the general understanding of freshwater fish ecology. Theoretical and modeling studies are suitable if they generate testable hypotheses, as are those with implications for fisheries. Manuscripts presenting analyses of published data are considered if they produce novel conclusions or syntheses. The journal publishes articles, fresh perspectives, and reviews and, occasionally, the proceedings of conferences and symposia.