A New Approach to Evaluate Reproductive Traits in Batch-Spawning Fishes of Indeterminate Fecundity and Asynchronous Oocyte Maturation

IF 6.4 1区 农林科学 Q1 FISHERIES
Kristína Hôrková-Žitňanová, K. Švolíková, Danka Haruštiaková, V. Kováč
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引用次数: 0

Abstract

Abstract Fishes are characterized by a great diversity of reproductive strategies that often make fecundity evaluation difficult. Unlike marine fishes, a single consensual concept of terminology and definitions is lacking for freshwater fish fecundity. Several approaches are known from scientific literature for evaluating fecundity in batch spawning fishes of indeterminate fecundity and asynchronous oocyte maturation. These methodological differences impose a bias on the outputs of comparative studies of fecundity. For both theoretical and practical reasons, accurate fecundity data are required to inform the decision-making process in terms of environmental policy and the related applications for the control of non-native species and the conservation management of native species and ecosystems. The main aim of the present study was to review briefly the existing fecundity-evaluation methods, to test among-method compatibility, and to develop a new approach that aims to make fecundity evaluation more systematic and transparent. A simulated ‘test’ dataset demonstrated considerable variability in the results obtained from the various existing approaches. The literature review and our analyses revealed a need for standardization. Thus, a new approach is proposed here that is based on multiple sampling throughout the reproductive cycle; provides greater overall detail of the species’ reproductive traits and permits inter-population comparisons.
一种评价不定产率和卵母细胞异步成熟批量生产鱼类繁殖特性的新方法
摘要鱼类的特点是繁殖策略的多样性,这往往使繁殖力评估变得困难。与海洋鱼类不同,淡水鱼类的繁殖力缺乏一个统一的术语和定义概念。从科学文献中已知几种方法来评估具有不确定繁殖力和卵母细胞异步成熟的批量产卵鱼类的繁殖力。这些方法上的差异对繁殖力的比较研究结果产生了偏见。出于理论和实践的原因,需要准确的繁殖力数据来为环境政策的决策过程以及控制非本土物种和保护管理本土物种和生态系统的相关应用提供信息。本研究的主要目的是简要回顾现有的繁殖力评估方法,测试方法之间的兼容性,并开发一种新的方法,旨在使繁殖力的评估更加系统和透明。模拟的“测试”数据集表明,从各种现有方法获得的结果存在相当大的可变性。文献综述和我们的分析揭示了标准化的必要性。因此,这里提出了一种新的方法,该方法基于整个生殖周期的多次采样;提供了物种繁殖特征的更全面的细节,并允许种群间的比较。
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来源期刊
CiteScore
25.20
自引率
0.90%
发文量
19
期刊介绍: Reviews in Fisheries Science & Aquaculture provides an important forum for the publication of up-to-date reviews covering a broad range of subject areas including management, aquaculture, taxonomy, behavior, stock identification, genetics, nutrition, and physiology. Issues concerning finfish and aquatic invertebrates prized for their economic or recreational importance, their value as indicators of environmental health, or their natural beauty are addressed. An important resource that keeps you apprised of the latest changes in the field, each issue of Reviews in Fisheries Science & Aquaculture presents useful information to fisheries and aquaculture scientists in academia, state and federal natural resources agencies, and the private sector.
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