Larval fish collected from sound‐scattering layers in an offshore tropical area

Abstract

The composition of the larval fish assemblage in the sound-scattering layer of the continental shelf waters off the coast of south-eastern Brazil (12 and 22° S), a research project that is part of the Brazilian programme Avaliação do Potencial Sustentável de Recursos Vivos na Zona Econômica Exclusiva (REVIZEE), is described. Samples were collected during daylight hours and at dusk at five oceanographic stations in the winter of 1999 using an Isaacs-Kidd Midwater Trawl (IKMT). The oceanographic stations were chosen based on the detection of plankton layers by acoustic observation. A total of 2192 larval fish were identified, comprising 52 families and 62 species. Maurolicus stehmanni (Sternoptychidae) was the most abundant species found within the study area, comprising 18·5% of all identified larvae, followed by Psilotris celsus (Gobiidae) at 10·9%.

Ficha de Psilotris celsa

“…No Brasil, existem registros da espécie em Arembepe, Salvador (Splink, 2013) e Abrolhos, na Bahia (Dutra et al, 2005). Larvas da espécie foram também registradas ao largo de Salvador e no Espírito Santo por Castro & Bonecker (2017). Psilotris celsa é uma espécie tropical que vive em ambientes recifais com fundos arenosos (Böhlke & Chaplin, 1968), em profundidades entre 2,5 e 15 metros (Greenfield et al, 1993), porém, a maioria dos espécimes brasileiros foi capturada entre 0 a 1 metro de profundidade.…”

First record of darter goby, Ctenogobius boleosoma (Jordan & Gilbert, 1882) (Gobiiformes: Gobiidae), in the Mediterranean with notes on larval morphology and cryptic diversity

“…The species spawns in marine waters during summer and autumn months (Wyanski & Targett, 2000). Larval darter gobies are amongst the most dominant species of estuarine and coastal ichthyoplankton in their native range (Castro & Bonecker, 2017;De Macedo-Soares et al, 2014;.…”