Fish feeding interactions in a subtropical coastal system in the southwestern Atlantic

Soares, Lucy Satiko Hashimoto; Arantes, L.P.L.; Lamas, Rafael Andrei; Lima, Flávia Afonso; Pucci, Marinella Coutinho Jacinto; Rossi-Wongtschowski, Carmen Lúcia del Bianco

doi:10.1016/j.ocecoaman.2018.04.002

Cited by 7 publications

(2 citation statements)

References 34 publications

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“…Research on fish feeding habits provides information necessary to understand ecological roles concerning environmental fluctuations and food availability (Gasalla and Soares, 2001;Bennemann et al, 2006;Christensen and Walters, 2004;Gasalla et al, 2007;Soares et al, 2018). Moreover, estimating trophic levels (TL) depicts the trophic position of organisms in the food web, considering both the food composition and the TL of each prey consumed Vasconcellos and Gasalla, 2001;Shannon et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

On the trophic role of pelagic fishes and fishery landings shifts in the South Brazil Bight

OLHER

Gasalla

2023

Ocean Coast. Res.

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Knowledge of the feeding habits of pelagic fishes off the Brazilian coast is scarce, making the analysis of trophic interactions often inaccurate. Here, we investigated the diet and trophic role of 12 pelagic fish species by revisiting samples obtained by the ECOSAR II Program (FURG/IO/IBAMA) between 23°S and 28°40'S, an area also known as South Brazil Bight. In addition, we analyzed their biomass and fisheries landings in order to examine shifts over time. The content of 432 stomachs was analyzed at the lowest taxonomic level possible. The frequencies of occurrence were used to cluster species, revealing three trophic guilds: "Planktivorous Clupeiformes", "Planktivorous Carangiformes", and "Piscivores". Most Carangidae consumed mainly copepods and other small crustaceans, except Selene setapinnis which clustered in the piscivorous guild together with Scombriformes specimens. In terms of biomass, the dominance of Trachurus lathami, Sardinella brasiliensis, and Trichiurus lepturus was evident. The species' trophic levels ranged from 2.98 to 4.5, showing that these fishes occupied intermediate to high trophic position. Comparing fisheries landings in two study periods (1986-2002 and 2003-2019), six species showed a decrease, while three an increase. Correlations between landings of the Brazilian sardine (Sardinella brasiliensis) and other pelagic fishes indicate that when the former's decreases, the catch of alternative species, such as Opisthonema oglinum and Chloroscombrus chrysurus, increases. The intermediate position of small pelagics in the food web may affect the availability of commercial species by controlling the abundance of lower and upper trophic-level organisms. These findings fill essential gaps for ecosystem modeling, suggesting that ecosystembased fisheries management should address multispecies issues of the pelagic realm rather than only singlespecies approaches. Combining past survey data with yield trends provides evidence for both natural and humaninduced ocean changes.

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Section: Introductionmentioning

confidence: 99%

On the trophic role of pelagic fishes and fishery landings shifts in the South Brazil Bight

OLHER

Gasalla

2023

Ocean Coast. Res.

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“…These variables are directly related to the body stretching and to the ability to feed on bigger prey items (Gatz, 1979;Watson & Balon, 1984). This not only morphologically differentiated these clupeids, for being species of carnivorous food habit, but also showed differences between them, since H. clupeola presents a more planktivore habit than O. oglinum which has a feeding preference for crustaceans (Vega-Candejas et al, 1997;Chaves & Vendel, 2008;Soares et al, 2018;Favero et al, 2019;Bomfim et al, 2020).…”

Section: Discussionmentioning

confidence: 94%

Ecomorphological relations of sympatric juveniles of Clupeiformes from a Brazilian sandy beach

França

Severi

2022

Iheringia, Sér. Zool.

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Surf zones are important for early life stages of several fish species for presenting characteristics such as high phytoplanktonic production, diverse food availability and shelter against predators. The action of waves in this environment provides nutrient cycling and increase the turbidity making surf zones ideal nursery environments for diverse species of fish, including clupeiforms. Clupeiform species have a great ecological and economic value for being abundant fish in tropical sandy beaches surf zones with significant fisheries importance. Studies about their feeding ecology and environment use are relevant, and one of the methods improving this knowledge is the application of ecomorphological analyses, which helps understanding species ecological interactions and their adaptations. In this context, the present study aimed to identify the ecomorphological relations and infer about the feeding ecology of eight sympatric clupeiform species in a Brazilian tropical sandy beach. Ten ecomorphological variables were analyzed of individuals belonging to the species Anchoa tricolor (Spix & Agassiz, 1829), Anchoa januaria (Steindachner, 1879), Anchovia clupeoides (Swainson, 1839), Anchoviella lepidentostole (Fowler, 1911), Lycengraulis grossidens (Spix & Agassiz, 1829), Chirocentrodon bleekerianus (Poey, 1867), Harengula clupeola (Cuvier, 1829) and Opisthonema oglinum (Lesueur, 1818), whose values were employed in a principal component analysis (PCA) with the two first axis explaining 58.92% of the total variance. A high morphological overlap between the species of Engraulidae was observed with the exception of A. clupeoides, which differed from the others for presenting higher values of the compression index and caudal peduncle compression index. The Clupeidae species differed from the other families due to higher values of relative height and relative head length which also showed differences between the species themselves, having H. clupeola presented the highest values of these variables. The representative of Pristigasteridae showed an intermediate overlap between the species of the other families because of its highly compressed body but with low scores of relative height, caudal peduncle relative length and mouth aspect ratio. The morphological differentiation between the families and even between species from the same family indicates niche divergences, showing that besides their phylogenetical proximity there are differences in their ecological interactions which possibly contribute to their coexistence.

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How much fluctuating asymmetry in fish is affected by mercury concentration in the Guanabara Bay, Brazil?

Seixas

Conté-Júnior

Santos

2020

Environ Sci Pollut Res

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Fish feeding interactions in a subtropical coastal system in the southwestern Atlantic

Cited by 7 publications

References 34 publications

On the trophic role of pelagic fishes and fishery landings shifts in the South Brazil Bight

On the trophic role of pelagic fishes and fishery landings shifts in the South Brazil Bight

Ecomorphological relations of sympatric juveniles of Clupeiformes from a Brazilian sandy beach

How much fluctuating asymmetry in fish is affected by mercury concentration in the Guanabara Bay, Brazil?

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