Júnior, José Pedro Vieira Arruda, Mota, Érika Maria Targino, Campos, Carolina Coelho, Costa, Ana Cecília Pinho, Soares, Marcelo de Oliveira ORCID: https://orcid.org/0000-0002-4696-3166 and Garcia, Tatiane Martins (2023) Analysis of a hypersaline drought-prone estuary reveals low density and diversity of fish eggs and larvae. Marine Pollution Bulletin, 187 . p. 114503. DOI https://doi.org/10.1016/j.marpolbul.2022.114503.

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Abstract

We analyzed fish eggs and larvae in an estuary under severe drought conditions. We detected an inverse salinity gradient, with values increasing from the mouth to the upper estuary. Egg densities decreased from the estuarine mouth to the upstream areas following the salinity increase for all three mesh net sizes. This pattern was also found for the density of larvae, which decreased in estuarine regions with hypersalinity (38 to 62). The low diversity constituted only nine fish species, which were classified as anadromous (Anchoa hepsetus), estuarine and marine (Bathygobius soporator, Hippocampus reidi, Eucinostomus sp., and Diapterus auratus), marine estuarine-opportunist (Caranx latus and Bardiella rochus), and marine stragglers (Echeneis naucrates and Haemulon sp.). In addition, we observed an oversimplification of the assemblage to include stress-tolerant estuarine and marine species. Our baseline results suggest that this hypersaline estuarine ecosystem has lower densities and diversity than a healthy mangrove system.

Document Type:	Article
Programme Area:	PA2
Research affiliation:	Ecology > Reef Systems
Refereed:	Yes
Open Access Journal?:	No
DOI:	https://doi.org/10.1016/j.marpolbul.2022.114503
ISSN:	0025326X
Date Deposited:	26 Jun 2023 11:45
Last Modified:	26 Mar 2024 13:31
URI:	http://cris.leibniz-zmt.de/id/eprint/5210

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