Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, Departamento de Biologia, Universidade Estadual de Maringá, Maringá, Brazil.
Capes - Foundation, Ministry of Education of Brazil, Brasília, Brazil.
J Fish Biol. 2021 Mar;98(3):694-706. doi: 10.1111/jfb.14614. Epub 2021 Jan 13.
This study focused on the distribution of fish with high reproductive activity along a basin, using a 430 km stretch of the Cuiabá River in Brazil as a model. The main objective of this study was to identify those fish that migrate long distances for reproduction, among all the basin species. Thus, a set of working criteria are proposed to classify species according to their reproductive behaviour (i.e., reproductive activity and distribution). Samplings were performed in the Cuiabá River basin, encompassing several environments (river, channels and lakes) during the reproductive periods (between October and February), from 2000 to 2004. Species occurrence (presence and absence - proxy of distribution) across the basin and index of reproductive activity values were used as criteria to identify the species that perform long-distance longitudinal migrations for reproduction. The study confirmed the classification of long-distance longitudinal migration species; nonetheless, some species were not classified as described in the literature. The proposed sequential criteria have proven to be effective in the classification of long-distance longitudinal migrations species and certainly contribute to filling some existing knowledge gaps of reproductive traits. This classification is of fundamental importance in planning new dam projects, in decision making and in the development of management and conservation actions for the ichthyofauna.
本研究以巴西库亚巴河 430 公里河段为模型，集中研究了具有高繁殖活动的鱼类在流域中的分布。本研究的主要目的是确定所有流域物种中那些进行长距离洄游繁殖的鱼类。因此，提出了一套工作标准，根据鱼类的繁殖行为（即繁殖活动和分布）对物种进行分类。采样工作于 2000 年至 2004 年期间在库亚巴河流域的多个环境（河流、渠道和湖泊）的繁殖期（10 月至 2 月之间）进行。使用物种在流域中的出现情况（存在和缺失——分布的代理）和繁殖活动指数作为标准，来识别那些为了繁殖而进行长距离纵向洄游的物种。研究证实了对长距离纵向洄游物种的分类；然而，有些物种的分类与文献中的描述并不相符。所提出的顺序标准已被证明在长距离纵向洄游物种的分类中是有效的，并且肯定有助于填补一些关于繁殖特征的现有知识空白。这种分类对于规划新的大坝项目、决策制定以及制定鱼类管理和保护措施具有重要意义。
