Spatial environmental variability of natural markers and habitat use of<i>Cathorops spixii</i>in a neotropical estuary from otolith chemistry

Carvalho, Bárbara Maichak de; Pupo, Daniel Vicente; Volpedo, Alejandra V.; Pisonero, Jorge; Méndez, Ana; Avigliano, Esteban

doi:10.1017/s0025315420000752

Cited by 12 publications

(10 citation statements)

References 62 publications

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“…According to the water Sr/Ca data reported for the Gulf of Mexico (Corpus Christi Bay and lower Laguna Madre Lagoon), the curve becomes approximately asymptotic with salinities of greater than 40, and shows greater variation between 0 and 25 (Walther & Nims, 2015). In some estuaries from south‐eastern Brazil, such as Dos Patos Lagoon (Albuquerque et al, 2012) and Paranaguá Estuary (Maichak de Carvalho et al, 2020), the water Sr/Ca ratio achieves relatively constant values at salinities of greater than 25. Moreover, the method applied in this work does not allow for discrimination between environments with salinities greater than marine values, because there are no Sr/Ca thresholds for hypersaline environments.…”

Section: Discussionmentioning

confidence: 99%

“…Estuarine migrant fish have larval stages in the estuary and often move out to sea, and estuarine residents are fish that complete their entire life cycle within the estuarine environment (Potter et al, 2015). Each fish was classified within these three categories visually, and the results were expressed in percentages in relation to the sample size for each collection site (Avigliano, Leisen, et al, 2017; Avigliano et al, 2020; Maichak de Carvalho et al, 2020; Soeth et al, 2020).…”

Section: Methodsmentioning

confidence: 99%

“…To assess whether the changes among Sr/Ca signatures through ontogeny were significant, change‐point analyses (CPAs) were performed for individual fish (Avigliano, Leisen, et al, 2017; Avigliano et al, 2018; Maichak de Carvalho et al, 2020). This analysis uses a combination of cumulative sum charts and bootstrapping to identify significant changes in stable Sr/Ca signatures (SSSs) across chemical time series.…”

Section: Methodsmentioning

confidence: 99%

“…This analysis associates each change with a confidence interval that indicates how well the change point has been determined (Taylor, 2000). Herein, the analyses were performed using 95% confidence level (Avigliano, Leisen, et al, 2017; Avigliano et al, 2018; Maichak de Carvalho et al, 2020). The Sr/Ca ratio was set as an independent variable and the core‐to‐edge ablation distance was set as a dependent variable.…”

Section: Methodsmentioning

confidence: 99%

“…To assess spatial differences in the number of stable signatures experienced throughout life, SSS was compared between sampling sites using the Kruskal–Wallis test. For this, the number of changes obtained for each fish was used as an independent variable and the collection site was used as a classification variable (Avigliano, Leisen, et al, 2017; Maichak de Carvalho et al, 2020). As potential differences in size or age between individuals could be associated with the number of SSSs, thus affecting the Kruskal–Wallis results, analysis of covariance (ANCOVA) and Spearman’s correlation tests were previously performed to assess the relationship of SSS with fish size and age (Avigliano, Leisen, et al, 2017; Maichak de Carvalho et al, 2020).…”

Section: Methodsmentioning

confidence: 99%

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Unravelling the complex habitat use of the white mullet, Mugil curema, in several coastal environments from Neotropical Pacific and Atlantic waters

Avigliano

Ibáñez

Fabré

et al. 2021

Aquatic Conservation

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The white mullet, Mugil curema, is a widely distributed euryhaline species, the migratory behaviour of which is poorly understood. The objective of this work was to study the large‐scale habitat use of this species for the first time. Several environments were considered, such as euryhaline and hypersaline lagoons, the sea, and a river, distributed in the Central Pacific (Mexico) and Atlantic (Gulf of Mexico, Caribbean Sea‐Venezuela, and north‐eastern Brazil). Otolith core‐to‐edge Sr/Ca ratios of 163 fish, determined by laser ablation inductively coupled plasma mass spectrometry, were used to study the salinity‐habitat migration history of the fish. Fish from Mexico (Tamiahua Lagoon, n = 4; Alvarado Lagoon, n = 2), Venezuela (n = 1), and Brazil (n = 12) (11.1% of the total) showed high Sr/Ca values at early life stages and were classified as marine estuarine opportunists. Two specimens (from Alvarado Lagoon and Balsas River, Mexico) showed Sr/Ca values consistently below the high salinity guide value (salinity < 33.5). For the rest of the fish (87.1%), the Sr/Ca ratio suggested a displacement from the estuary towards the sea or hypersaline environments, and so these fish were classified as estuarine migrants. A change‐point analysis identified six individuals with a single stable otolith Sr/Ca signature through ontogeny (three from Brazil, one from Venezuela, and two from Tamiahua Lagoon, Mexico), suggesting limited displacement between environments with different salinities. The rest of the individuals showed between two and 10 changes in stable Sr/Ca signatures (mean = 4.07 ± 1.85). The highest number of changes in Sr/Ca ratio (4.87 ± 1.1) was found in fish from Laguna Madre (Mexico) and the lowest was found in fish from Brazil (3.27 ± 1.70) (H = 19.8, p = 0.002). Otolith Sr/Ca time series suggest that the migratory estuarine pattern is the most common throughout the study area. This work highlights that the sustainable use of M. curema depends on the conservation of estuaries and the corridors between them and other environments such as lagoons, rivers, mangroves and the sea.

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Section: Discussionmentioning

confidence: 99%