Functional diversity of fish in tropical estuaries: A traits-based approach of communities in Pernambuco, Brazil

Júnior, Carlos Antônio Beserra da Silva; Mérigot, Bastien; Lucena‐Frédou, Flávia; Ferreira, Beatrice Padovani; Coxey, Mariana Sofia Gameiro Silva; Rezende, S. M.; Frédou, Thierry

doi:10.1016/j.ecss.2016.08.030

Cited by 20 publications

(14 citation statements)

References 45 publications

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“…Conversely, when resources are abundant, niche overlap (i.e., dietary overlap) between species may not configure interspecific competition but instead the sharing of prey (Delbeek and Williams, 1987;Lucena et al, 2000). Our findings support this hypothesis given similarities in the diets of snook species (Vasconcelos Filho et al, 2003;Lira et al, 2017) and the abundance of gobies (snooks' main prey) found in Santa Cruz (see Merigot et al, 2016;Silva-Júnior et al, 2016). Moreover, Santa Cruz and Catuama…”

Section: Discussionsupporting

confidence: 84%

Trophic resource partitioning of two snook fish species (Centropomidae) in tropical estuaries in Brazil as evidenced by stable isotope analysis

Gonzalez

Ménard

Loc’h

et al. 2019

Estuarine, Coastal and Shelf Science

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We investigated the trophic niches and the resource partitioning of two snook species, the common (Centropomus undecimalis) and the fat snook (C. parallelus), in four tropical estuaries of the northeastern Brazil, using stable isotope analyses of carbon (δ13C) and nitrogen (δ15N). Fish specimens, mainly juveniles, basal resources and a primary consumer were collected in 2015 during dry and rainy seasons in all estuaries, which exhibited differences in system size, geomorphologic shapes, levels of sea access and anthropic pressures. Potential effect of factors like fish body length, estuary and seasonality on isotope ratios were investigated. Positive relationships between the size of fish and δ15N values were found, regardless the species. Our results indicated that snooks can be characterized as secondary consumers and have close trophic niches in most estuaries. Trophic overlaps were more pronounced within the largest estuaries (Catuama and Santa Cruz), whereas smaller systems that have restricted connections to the sea presented low isotopic niche overlap between both species (Suape and Sirinhaém). Moreover, a higher variability of δ13C and δ15N values in snooks was found in larger estuaries undergoing stronger influences from coastal adjacent waters. Although we were not able to detect clear seasonal effects, greater isotopic overlaps were found during the rainy season. Despite the lack of intrinsic differences in life history traits, both species, dominated by juveniles, shared similar trophic niches in these environments. Highlights ► δ 13 C and δ 15 N of two Centropomidae were investigated in four estuaries in Brazil. ► Juveniles of Centropomus undecimalis and C. parallelus have close isotopic niches. ► Trophic overlaps were more pronounced in large estuaries. ► Resource partitioning process might reflects the resource availability in estuaries.

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Section: Discussionsupporting

confidence: 84%

Trophic resource partitioning of two snook fish species (Centropomidae) in tropical estuaries in Brazil as evidenced by stable isotope analysis

Gonzalez

Ménard

Loc’h

et al. 2019

Estuarine, Coastal and Shelf Science

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“…In our model, the snook group mainly contained pre-adult individuals, and they drove a top-down control of the system, a type of control where top predators determine the bulk of the lower TLs through direct and indirect effects (Dineen and Robertson, 2010;Testa et al, 2016). Snook is considered to be an important species in estuarine tropical systems Greenwood, 2017), and, in Sirinhaém, its trophic role is the predation of fish and crustaceans (Lira et al, 2017;Merigot et al, 2016;Silva-Júnior et al, 2016). Anthropogenic-induced changes (e.g., fishing) on the biomass of key groups could be transferred through a trophic cascade effect within the food web.…”

Section: Accepted Manuscript 13mentioning

confidence: 99%

Trophic flow structure of a neotropical estuary in northeastern Brazil and the comparison of ecosystem model indicators of estuaries

Lira

Angelini

Loc’h

et al. 2018

Journal of Marine Systems

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We developed an Ecopath model in the Estuary of Sirinhaém River (SIR), a small-sized system surrounded by mangroves, subject to high impact, mainly by sugar cane industry and other farming industries in order to describe the food web structure and trophic interactions. In addition, we compared our findings with those of 20 available Ecopath estuarine models for tropical, subtropical and temperate regions, aiming to synthesize the knowledge on trophic dynamics and provide a comprehensive analysis of the structures and functioning of estuaries. Our model consisted of 25 compartments and its indicators were within the expected range for estuarine areas around the world. The average trophic transfer efficiency for the entire system was 11.8%, similar to the theoretical value of 10%. The Keystone Index and MTI (Mixed Trophic Impact) analysis indicated that the snook (Centropomus undecimalis and Centropomus parallelus) and jack (Caranx latus and Caranx hippos) are considered as key resources in the system, revealing its high impact in the food web. Both the species have a high ecological and commercial relevance, despite the unregulated fisheries. As result of the comparison of ecosystem model indicators in estuaries, differences in the ecosystem structure from the low latitude zones (tropical estuaries) to the high latitude zones (temperate system) were noticed. The structure of temperate and sub-tropical estuaries were based on high flows of detritus and export, while tropical systems have high biomass, respiration and consumption rates. Higher values of System Omnivory Index (SOI) and Overhead (SO) were observed in the tropical and subtropical estuaries, denoting a more complex food chain. Globally, none of the estuarine models were classified as fully mature ecosystems, although the tropical ecosystems were considered more mature than the subtropical and temperate ecosystems. This study is an important contribution to the trophic modeling of estuaries, Highlights ► Sirinhaém estuary, Northeast Brazil, is an immature and resilient ecosystem. ► The jack and, mainly, snook were key species in the Estuary of Sirinhaém River. ► Tropical estuaries were based in high biomass, respiration and consumption rates. ► The System Overhead Index was higher in tropical estuaries than in the other systems. ► TPP/TR was lower in tropical estuaries than in the other systems.

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“…Brazil (Vieira, 1991), including the nearby estuarine complex of the Formoso River Paiva et al, 2009;Silva-Júnior et al, 2016). Gerreid dominance in nearby estuaries has been attributed to their connectivity with other coastal habitats .…”

Section: Discussionmentioning

confidence: 99%

Diversity of settlement‐stage reef fishes captured by light‐trap in a tropical south‐west Atlantic Ocean coastal reef system

Grande

Rezende²,

Simon

et al. 2018

Journal of Fish Biology

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This study reports the results of 5 years of monitoring reef fish post‐larvae using light traps in the Bay of Tamandaré, north‐east Brazil. An annotated checklist of pre‐settlement fish species, their frequency of occurrence and taxonomic characteristics are provided. In total, 4,422 post‐larval fishes belonging to 36 families, 56 genera and 76 species were captured. The most species‐rich families were Carangidae (7), Lutjanidae (6) and Pomacentridae (4), while the families Gerreidae (30.47%), Holocentridae (16.54%), Blenniidae (12.01%), Labrisomidae (8.36%), Lutjanidae (8.29%) and Acanthuridae (5.95%) were the most abundant. This is the first study of the taxonomic diversity and assemblage structure of settlement‐stage reef fishes in the tropical south‐west Atlantic Ocean. Although a few common species were not captured due to selectivity of light traps, the composition and taxonomic diversity of this first collection suggests that light traps are useful for studies of the early life history of a wide range of pre‐settlement reef fishes.

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Functional diversity of fish in tropical estuaries: A traits-based approach of communities in Pernambuco, Brazil

Cited by 20 publications

References 45 publications

Trophic resource partitioning of two snook fish species (Centropomidae) in tropical estuaries in Brazil as evidenced by stable isotope analysis

Trophic resource partitioning of two snook fish species (Centropomidae) in tropical estuaries in Brazil as evidenced by stable isotope analysis

Trophic flow structure of a neotropical estuary in northeastern Brazil and the comparison of ecosystem model indicators of estuaries

Diversity of settlement‐stage reef fishes captured by light‐trap in a tropical south‐west Atlantic Ocean coastal reef system

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