Analysis of a hypersaline drought-prone estuary reveals low density and diversity of fish eggs and larvae
José Pedro Vieira Arruda Júnior
Érika Maria Targino Mota
Carolina Coelho Campos
Ana Cecília Pinho Costa
Marcelo de Oliveira Soares
Tatiane Martins Garcia
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.
Júnior J.P.V.A., Mota É.M.T., Campos C.C., Costa A.C.P., Soares M.d.O. and Garcia T.M. (2023) Analysis of a hypersaline drought-prone estuary reveals low density and diversity of fish eggs and larvae. Marine Pollution Bulletin 187: 114503. 10.1016/j.marpolbul.2022.114503
@article{Júnior2023,
Title = {Analysis of a hypersaline drought-prone estuary reveals low density and diversity of fish eggs and larvae},
Author = {Júnior, José Pedro Vieira Arruda and Mota, Érika Maria Targino and Campos, Carolina Coelho and Costa, Ana Cecília Pinho and Soares, Marcelo de Oliveira and Garcia, Tatiane Martins},
Editor = {},
Journal = {Marine Pollution Bulletin},
Year = {2023},
Pages = {114503},
Volume = {187},
Doi = {10.1016/j.marpolbul.2022.114503},
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.},
}
TY - JOUR
AU - Júnior, José Pedro Vieira Arruda
AU - Mota, Érika Maria Targino
AU - Campos, Carolina Coelho
AU - Costa, Ana Cecília Pinho
AU - Soares, Marcelo de Oliveira
AU - Garcia, Tatiane Martins
TI - Analysis of a hypersaline drought-prone estuary reveals low density and diversity of fish eggs and larvae
T2 - Marine Pollution Bulletin
PY - 2023
SP - 114503
VL - 187
DO - 10.1016/j.marpolbul.2022.114503
AB - 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.
ER -
