Fluvio-marine travelers from South America: cyclic amphidromy and freshwater residency, typical behaviors in genidens barbus inferred by otolith chemistry
Author
dc.contributor.author
Avigliano, Esteban
Author
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Leisen, Mathieu
Author
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Romero, Rurik
Author
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Carvalho, Bárbara
Author
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Velasco, Gonzalo
Author
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Vianna, Marcelo
Author
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Barra Pantoja, Luis Fernando
Author
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Volpedo, Alejandra Vanina
Admission date
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2018-05-22T16:21:08Z
Available date
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2018-05-22T16:21:08Z
Publication date
dc.date.issued
2017
Cita de ítem
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Fisheries Research 193 (2017) 184–194
es_ES
Identifier
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10.1016/j.fishres.2017.04.011
Identifier
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https://repositorio.uchile.cl/handle/2250/148025
Abstract
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Catfish Genidens barbus is a commercially fished species from the south-western Atlantic Ocean. Overfishing of this species during the last few years has caused a collapse of fisheries and in turn has led to a ban of its exploitation. In order to identify the migratory patterns of this species in four migration corridors from South America, we determined the Sr:Ca and Ba:Ca ratios in otoliths, by Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICPMS). Sr:Ca and Ba:Ca ratios range between 0.90 and 9.83 mmol/mol (mean +/- standard deviation: 3.86 +/- 1.05 mmol/mol) and between 0.00013 and 0.10 mmol/mol (mean +/- SD: 0.0094 +/- 0.0160 mmol/mol), respectively. Three types of amphidromous and cyclical (annual) patterns that include the use of freshwater, estuarine and marine environments are detected. Resident freshwater fish (6.5%) are found only in Patos Lagoon. Depending on the study site, between 18 and 45% of the analyzed fish population were spawned in freshwater, while the rest were spawned in estuarine waters. The change-point analysis shows a positive correlation between changes in the transects of Sr:Ca and Ba:Ca ratios (r = 0.63, p = 0.0001), whereas the Kruskal-Wallis test shows no significant differences in the number of changes in transects of the Sr:Ca ratio between sampling sites (H = 2.1, p = 0.53). Only for Patos Lagoon the analyses show a significantly higher number of changes for the Ba:Ca ratio (H = 9.1, p = 0.03). The data indicate that the average number of movements among environments is similar between the four corridors. The number of changes of the Ba:Ca ratio appears to be higher and more variable in relation to the Sr:Ca ratio, indicating that the former could be more sensitive to environmental changes. In conclusion, this work describes for the first time, annual amphidromous migrations and dependence on freshwater for different fluvial-marine systems. The understanding of the habitat use will help design species and estuarine-specific management actions with the ultimate goal of recovering fisheries.
es_ES
Patrocinador
dc.description.sponsorship
CONICYT-Fondequip, EQM120098 / CONICET, PIP 112-20120100543CO /
ANPCyT, PICT 2015-1823 / Universidad de Buenos Aires, UBACYT 20020150100052BA /
Institute de Oceanografia from Universidade Federal do Rio Grande (FURG) /
Centros Asociados para el Fortalecimiento de Posgrados Program (Brazil/Argentina), CAPP BA 43/13 /
Long Term Ecological Program-CNPq, PELD403809/2012-6 /
FAPERJ, E26/110.114/2013, E26/112.636/2012
Fluvio-marine travelers from South America: cyclic amphidromy and freshwater residency, typical behaviors in genidens barbus inferred by otolith chemistry