New Technique for Identification of Ichthyoplankton and Its Application in Biomonitoring Studies, Management and Conservation of Neotropical Fish.

Autor: Reynalte-Tataje DA; Programa de Pós-graduação em Ambiente e Tecnologias Sustentáveis (PPGATS) - Campus Cerro Largo, Universidade Federal Fronteira Sul (UFFS), 97900-000, Cerro Largo, Rio Grande do Sul, Brazil. david.tataje@uffs.edu.br.; Programa de Pós-graduação em Ecologia de Ambientes Aquáticos Continentais, Departamento de Biologia, Centro de Ciências Biológicas (CCB), Universidade Estadual de Maringá (UEM), Av. Colombo, 5790, 87020-900, Maringá, Paraná, Brazil. david.tataje@uffs.edu.br., Zaniboni-Filho E; Laboratório de Biologia e Cultivo de Peixes de Água Doce, Departamento de Aquicultura, Universidade Federal de Santa Catarina, Rodovia Francisco Thomaz dos Santos, 3532, Armação do Pântano do Sul, 88066-260, Florianópolis, Santa Catarina, Brazil., Lopes CA; Laboratório de Biologia e Cultivo de Peixes de Água Doce, Departamento de Aquicultura, Universidade Federal de Santa Catarina, Rodovia Francisco Thomaz dos Santos, 3532, Armação do Pântano do Sul, 88066-260, Florianópolis, Santa Catarina, Brazil., de Ávila-Simas S; Laboratório de Biologia e Cultivo de Peixes de Água Doce, Departamento de Aquicultura, Universidade Federal de Santa Catarina, Rodovia Francisco Thomaz dos Santos, 3532, Armação do Pântano do Sul, 88066-260, Florianópolis, Santa Catarina, Brazil., Bialetzki A; Programa de Pós-graduação em Ecologia de Ambientes Aquáticos Continentais, Departamento de Biologia, Centro de Ciências Biológicas (CCB), Universidade Estadual de Maringá (UEM), Av. Colombo, 5790, 87020-900, Maringá, Paraná, Brazil.; Laboratório de Ictioplâncton, Núcleo de Pesquisas em Limnologia, Ictiologia e Aquicultura (Nupélia), CCB/UEM, Av. Colombo, 5790, Bloco G-80, 87020-900, Maringá, Paraná, Brazil.
Jazyk: angličtina
Zdroj: Environmental management [Environ Manage] 2024 Oct; Vol. 74 (4), pp. 808-817. Date of Electronic Publication: 2024 Jul 03.
DOI: 10.1007/s00267-024-02010-3
Abstrakt: Despite significant advancements in ichthyoplankton collection and data processing, challenges persist in the taxonomic identification of these organisms, particularly their eggs. To overcome these challenges, a novel technique has been developed to facilitate the identification of live eggs collected directly in wild. This user-friendly technique includes the collection, processing of the material, and field incubation. Sampling must be conducted using a pelagic net towed at low speed, preferably during early evening. The material processing involves pre-sorting and sorting to remove eggs and larvae. The separated eggs, kept in an aerated bowl, can be identified based on their morphological and meristic characteristics. Unidentified eggs can be placed in plastic bags with oxygen and incubated directly in the aquatic environment for 48-72 h. After this incubation period, the hatched larvae at the yolk-sac or preflexion stage, are identified to the lowest possible taxonomic level. Depending on the study's purpose, hatched larvae and field-collected larvae can be transported to research centers for further development, released back into the natural environment, or fixed to complete the collection. The application of this technique supports management and monitoring programs by identifying spawning areas through egg identification, forming broodstock, and replenishing threatened species, thereby enhancing scientific collections of ichthyoplankton. Additionally, it reduces mortality in ichthyoplankton techniques, including endangered species. Therefore, we believe that this novel taxonomic technique for identifying live ichthyoplankton represents a paradigm shift in the monitoring, management, and conservation of fish, as well as in ecological stewardship and advances in this area of research.
(© 2024. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
Databáze: MEDLINE
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