Moon, tidal and diel influences on catch composition of fishes in the surf zone of Pontal do Sul beach, Paraná

Godefroid, Rodrigo Santiago; Hofstaetter, Marion; Spach, Henry Louis

doi:10.1590/s0101-81751998000300014

Cited by 18 publications

(22 citation statements)

References 5 publications

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“…In addition, capture rates were even higher in conditions of high water transparency. The collected biomass was also higher during the day in another study in the region of the Baía de Paranaguá (Godefroid et al, 1998). Also, Horn (1980) and Lin et al (1999) found negligible differences in the biomass of dominant species between diurnal and nocturnal samples, a result that is also inconsistent with the hypotheses presented above.…”

Section: Resultsmentioning

confidence: 86%

Diel variation in fish assemblages in tidal creeks in southern Brazil

et al. 2008

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Tidal creeks are strongly influenced by tides and are therefore exposed to large differences in salinity and depth daily. Here we compare fish assemblages in tidal creeks between day and night in two tidal creeks in southern Brazil. Monthly day and night, simultaneous collections were carried out in both creeks using fyke nets. Clupeiformes tended to be caught more during the day. Cathorops spixii, Genidens genidens and Rypticus randalli tended to be caught at night. Sciaenidae also tended to be caught more during the night. In general, pelagic species were diurnal, while deep water species were nocturnal. These trends are probably due to a variety of causes, such as phylogeny, predation and net avoidance.Keywords: tidal creeks, fish, diel variation. Variação diuturna nas assembléias de peixes dos rios de maré do sul do Brasil ResumoAs gamboas são canais com traçado meandrante altamente influenciados pelas marés e sofrem grande variação de salinidade e profundidade em um mesmo dia. O objetivo deste trabalho foi comparar as assembléias de peixes diurna e noturna, e para tanto foram escolhidas duas gamboas no sul do Brasil. Coletas mensais foram feitas simultaneamente na maré vazante da tarde e na maré enchente da noite, com o auxílio de redes fyke. Os clupeiformes exibiram tendência para captura diurna. As espécies: Cathorops spixii, Genidens genidens e Rypticus randalli exibiram forte tendência para captura noturna. A família Sciaenidae também mostrou tendência para captura noturna. De forma geral, espécies pelágicas foram mais capturadas durante o dia, e espécies mais relacionadas ao fundo foram mais capturadas à noite, e isto se deve à ação conjunta de vários fatores, tais como: padrões filogenéticos, fuga do instrumento de coleta e busca de locais mais protegidos contra predação.Palavras-chave: gamboas, peixes, variação diuturna.

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Section: Resultsmentioning

confidence: 86%

Diel variation in fish assemblages in tidal creeks in southern Brazil

et al. 2008

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“…testudineus, C. spixii, G. genidens, and B. ronchus were dominant benthophagic species that showed considerable irregularity in abundance, yet were still present throughout the entire year, as seen in other regions of the same estuarine system (Godefroid et al, 1998;Oliveira-Neto et al, 2004;Spach et al, 2004;Spach et al, 2003;Vendel et al 2002.). …”

Section: Discussionmentioning

confidence: 88%

Fish communities of two tidal creeks in the Pinheiros bay, state of Paraná, southern Brazil

Neto¹,

Spach²,

Schwarz³

et al. 2010

Braz. J. Aquat. Sci. Technol.

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Tidal creeks are meandering channels that are highly influenced by tidal changes and can experience substantial variation in salinity and depth over the course of the same day. The goal of the present work is to survey the ichthyofauna associated with these environments and to assess seasonal differences in their composition in tidal creeks of the euhaline sector of the estuary of the Paranaguá. Two tidal creeks of the Pinheiros bay were sampled monthly at the same time using fyke nets. A total of 13,755 fish from 55 species and 27 families were captured. Only the clupeiforms Anchoa parva, Cetengraulis edentulus, and Harengula clupeola showed substantial seasonal variation in abundance, being most frequent during the fall and its adjacent months. Benthophagic individuals such as Sphoeroides testudineus, Bairdiella ronchus and Cathorops spixii were the most dominant in terms of biomass and were present all year long, although with irregular abundance. Sciaenid species were most frequent in the fall and winter, both as juveniles and as adults. The spring and part of the fall were characterized by the highest number of species with mature gonads, whereas the fall was the most important recruitment period, causing an increase in the richness indices and in the number of captured individuals. Tidal creeks were intensively visited by fish of all trophic levels and ages. These results, together with the high richness and diversity indices, corroborate the importance of tidal creeks for the preservation of estuarine environments.

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“…However, only Pomadasys corvinaeformis and Bagre marinus presented statistically higher lengths at night compared to the diurnal period. In a study performed at Pontal do Sul beach, Paraná, it was verified that the capture of individuals of P. corvinaeformis with greater weights was more expressive at night than during the day (Godefroid et al, 1998). This may be attributed to their closeness to the shallow coastal zone to avoid predators that rely mainly on vision to search for preys (Abou-Seedo et al, 1990;Félix-Hackradt 2010).…”

Section: Discussionmentioning

confidence: 97%