Carbon primary sources and estuarine habitat use by two congeneric ariid catfishes in a subtropical coastal lagoon

Pereyra, Paula Evelyn Rubira; Mont’Alverne, Renata; Garcia, Alexandre

doi:10.1590/s1984-4689zool-20150075

Cited by 8 publications

(9 citation statements)

References 14 publications

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“…(2016). This age corresponds to the early months of life that occur between the fresh water or estuary, where the species spawns (Reis, 1986b; Araújo, 1988; Pereyra et al ., 2016).…”

Section: Methodsmentioning

confidence: 99%

Inter-annual variability in otolith chemistry of catfish Genidens barbus from South-western Atlantic estuaries

et al. 2017

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The catfish Genidens barbus is a commercial species from South America. The aim of the present study was to examine the inter-annual variability in estuary-specific chemical signatures of otolith cores (Ba:Ca, Mg:Ca, Mn:Ca, Sr:Ca and Zn:Ca ratios) for three estuaries from Argentina and Brazil where adults were collected over multiple years. Secondarily, we evaluated whether the percentages of classification of individuals to their natal origin place are affected by the grouping of several cohorts. Most element:Ca ratios were not significantly different among year cohorts. Results from PERMANOVA revealed significant differences in the multi-element signatures of the otolith core between cohorts for the Plata River estuary (PR) (P = 0.006) and the Patos Lagoon (PL) (P = 0.03), while no significant differences (P = 0.9) were found for Paranaguá Bay (PB). The percentages of spatial classification (discriminant function analyses) decreased to between 15.5 and 25% for PR and PL when cohorts were grouped. This work makes it clear that the temporal variation in the chemical signature of the adult catfish otolith core can greatly affect the percentages of spatial classification.

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“…(2016). This age corresponds to the early months of life that occur between the fresh water or estuary, where the species spawns (Reis, 1986b; Araújo, 1988; Pereyra et al ., 2016).…”

Section: Methodsmentioning

confidence: 99%

Inter-annual variability in otolith chemistry of catfish Genidens barbus from South-western Atlantic estuaries

et al. 2017

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“…Pereyra et al . (2016) found that G. genidens adults consumed freshwater-derived carbon sources, and Bizerril (1999) also observed spatial differences governed by salinity in the habitat usage of marine catfishes, allowing their coexistence. The stable isotopes of the present study revealed no variation in habitat usage.…”

Section: Discussionmentioning

confidence: 99%

“…In Brazil, the Ariidae family is represented by demersal marine catfishes usually found in coastal and estuarine ecosystems (Marceniuk & Menezes, 2007; Schmidt et al ., 2008; Denadai et al ., 2012; Pereyra et al ., 2016). Along the coast of São Paulo and Rio de Janeiro, their spatial distribution in estuarine systems is governed by salinity (Bizerril, 1999; Denadai et al ., 2012).…”

Section: Introductionmentioning

confidence: 99%

“…To date, the trophic ecology of marine catfishes has been intensively studied over the last two decades (Chaves & Vendel, 1996; Bizerril, 1999; Denadai et al ., 2012; Pinheiro-Sousa et al ., 2015; Tavares & Di Beneditto, 2017; Di Beneditto et al ., 2018; Di Beneditto & Tavares, 2019). However, few studies off the Brazilian coast have focused on isotopic tracers (Giarrizzo et al ., 2011; Claudino et al ., 2015; Pereyra et al ., 2016; Di Beneditto et al ., 2018), and no data are available regarding stable isotopes coupled with Hg analyses in marine catfishes.…”

Section: Introductionmentioning

confidence: 99%

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The trophic ecology of marine catfishes in south-eastern Brazil

et al. 2020

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The stable isotope ratios of carbon (δ13C) and nitrogen (δ15N) and total mercury concentrations (THg) of the three marine catfish species Aspistor luniscutis, Bagre bagre and Genidens genidens were evaluated to understand their trophic relationship in northern Rio de Janeiro state, south-eastern Brazil. The δ13C was similar among the three marine catfishes, whereas δ15N was similar in A. luniscutis and B. bagre and lower in G. genidens. THg was higher in G. genidens and lower in B. bagre. The greater assimilation of Sciaenidae fishes and squids by A. luniscutis and B. bagre resulted in smaller isotopic niche areas and trophic diversity but higher isotopic niche overlap, trophic redundancy and evenness. For G. genidens, the similar assimilation of all prey items resulted in the broadest isotopic niche among the marine catfishes. The higher mercury content in G. genidens is consistent with an increased important contribution of prey with a higher Hg burden. The bioaccumulation process was indicated by significant correlations of δ15N and THg with total length and total mass. Additionally, a significant correlation between THg and δ15N reflected the biomagnification process through the food web.

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“…competition and/or predation pressure) experienced by each individual fish within the population (Chapman et al ., 2012 b ). We speculate that some individuals of G. genidens may seek freshwater reaches of the Patos Lagoon to ameliorate interspecific competition with the congeneric species G. barbus and G. planifrons (Araújo, 1988), which also use the estuarine zone of this lagoon as feeding grounds (Araújo, 1984; Pereyra et al ., 2016). Partial migration and the occurrence of contingents were also reported for the congeneric marine catfish G. barbus , in the adjacent La Plata River, Argentina and south Brazil (Avigliano et al ., 2017).…”

Section: Discussionmentioning

confidence: 99%

Use of fresh water by an estuarine-resident marine catfish: evidence from gonadal and otolith chemistry analyses

et al. 2019

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In this study, we examine how the Guri catfish Genidens genidens uses estuarine and freshwater habitats along the largest South American coastal lagoon, through the chemical analysis of otoliths and microscopic analysis of gonads. Chemical composition (Sr:Ca) of otolith edges allowed distinguishing between individuals who used the estuarine or freshwater compartments of the lagoon. The analysis of core-to-edge chemical profiles of each individual otolith revealed that the population may present two different patterns of habitat use along the lagoon. The ‘type 1’ pattern (89.5%) includes fish who appear to have been born in estuarine waters, whereas ‘type 2’ (9.5%) includes those fish born in fresh water. Nevertheless, juveniles from both patterns appear to migrate to estuarine waters. The gonad analysis shows G. genidens may reproduce in fresh water, as nearly 57% of all sampled fish were found to spawn in the freshwater portion of the lagoon. Also, the otolith core of many adult fish presented freshwater signatures, thus suggesting consistent fresh water use during early life. Our findings based on otolith and gonadal analyses challenge the previous classification of G. genidens as an estuarine resident. Rather, our results allow the suggestion that this species should be placed in the ‘estuarine and fresh water’ guild, which includes both fish completing their life cycles within the estuary and fish who consistently use freshwater habitats.

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Carbon primary sources and estuarine habitat use by two congeneric ariid catfishes in a subtropical coastal lagoon

Cited by 8 publications

References 14 publications

Inter-annual variability in otolith chemistry of catfish Genidens barbus from South-western Atlantic estuaries

Inter-annual variability in otolith chemistry of catfish Genidens barbus from South-western Atlantic estuaries

The trophic ecology of marine catfishes in south-eastern Brazil

Use of fresh water by an estuarine-resident marine catfish: evidence from gonadal and otolith chemistry analyses

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