Comparing the use of beach seine and cast net at characterizing intertidal fish fauna structure of a subtropical bay

Abstract

Although beach seines and cast nets are widely used to sample fishes in coastal marginal habitats, a comparison between such gears at determining fish fauna structure of tidal flats during high water is lacking. Here we compared the effectiveness of a multifilament beach seine and a monofilament cast net for sampling the intertidal fish assemblage structure of a subtropical bay in Brazil. We found an overall best performance for beach seine. In comparison to cast net, the beach seine sampled (I) a substantially greater density for the local dominant species, Atherinella brasiliensis; (II) a slightly greater density for juveniles of other conspicuous species, i.e. Mugil curema, Eucinostomus argenteus, Harengula clupeola, and Oligoplites saurus; (III) a higher total and mean richness; and (IV) higher the number and abundance of benthivores and higher the abundance of omnivores. The cast net better sampled the small planktivores, especially Sardinella brasiliensis juveniles. Such outcomes could support a future local fish-monitoring program and emphasize the great importance of evaluating the gear performance before starting fish sampling operations.

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Published
2018-12-25
How to Cite
CONTENTE, Ríguel Feltrin; ROSSI-WONGTSCHOWSKI, Carmen Lucia del Bianco. Comparing the use of beach seine and cast net at characterizing intertidal fish fauna structure of a subtropical bay. Boletim do Instituto de Pesca, [S.l.], v. 44, n. 3, p. 208-216, dec. 2018. ISSN 1678-2305. Available at: <https://www.pesca.sp.gov.br/boletim/index.php/bip/article/view/1314>. Date accessed: 25 may 2022. doi: https://doi.org/10.20950/1678-2305.2018.227.
Section
Short Communication