Enhancing knowledge on low‐value fishing species: the distinct reproductive strategy of two gurnard species
| Autor: | Maria Filomena Magalhães, Susana Mendes, Vera Sequeira, Elisabete Silva, Rui Ganhão, Ana Rita Vieira, Leonel Serrano Gordo, Frederica Silva, Rui Rebelo, Ana Neves, Maria M. Gil, Carlos A. Assis, Ana M. Duarte, Inês Sousa |
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| Přispěvatelé: | Repositório da Universidade de Lisboa |
| Rok vydání: | 2021 |
| Předmět: |
Piper gumard
Male fecundity media_common.quotation_subject Fishing Zoology non-target species Aquatic Science Piper gurnard reproduction Effective population size Animals red gurnard Sex Ratio Ecology Evolution Behavior and Systematics media_common biology Reproduction Red gumard biology.organism_classification Fecundity Perciformes Overexploitation Fertility piper gurnard Female Seasons Red gurnard Sex ratio |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| ISSN: | 1095-8649 0022-1112 |
| Popis: | ACKNOWLEDGEMENTS : This study was partially supported by the European Maritime and Fisheries Fund MAR2020 project “VALOREJET: Valorização de espécies rejeitadas e de baixo valor commercial,” MAR-01.03.01-FEAMP0003, and by Fundação para a Ciência e Tecnologia through research contracts attributed to Vera Sequeira (CEECIND/02705/2017) and Ana Rita Vieira (CEECIND/01528/2017) and strategic project UID/MAR/04292/2019. The depletion and overexploitation of several fish stock demands for a valorisation of non-target and discarded species. Nonetheless, such species are often poorly studied, and information on their biological parameters must be gathered for effective population management. For 1 year, the reproductive strategy of the piper gurnard Trigla lyra and the red gurnard Chelidonichthys cuculus was studied by monthly samples obtained from commercial boats operating on western Portuguese coast. Both species showed a biased sex ratio towards females, especially for larger length classes. Length at first maturity could be estimated only for red gurnard (22.1 and 19.9 cm for females and males, respectively) because all piper gurnard individuals caught were mature. Piper gurnard showed determinate fecundity and a short spawning season, from November to February with a peak in January, whereas red gurnard showed indeterminate fecundity and a wide spawning season, from late December to May. The relative annual fecundity estimated for red gurnard (1893 ± 728 oocytes x g-1 eviscerated weight [EW]) was higher than the one estimated for piper gurnard (1018 ± 250 oocytes x g-1 EW). Although important information for understanding the species dynamics is presented in this study, additional information on other life-history parameters and of species landings is required. info:eu-repo/semantics/publishedVersion |
| Databáze: | OpenAIRE |
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