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Diel vertical migration of predators (planktivorous fish larvae) and prey (zooplankton) in a tropical lagoon Iheringia, Sér. Zool.
Mendonça,Marcos Marques; Picapedra,Pablo Henrique dos Santos; Ferronato,Michelli Caroline; Sanches,Paulo Vanderlei.
ABSTRACT Based on the hypothesis that diel vertical migration (DVM) is a mechanism of predator avoidance, the objective of the present study was to test for the occurrence of DVM in planktivorous fish larvae of Hypophthalmus edentatus (Spix, 1829) (Siluriformes, Pimelodidae) and Plagioscion squamosissimus (Heckel, 1840) (Perciformes, Sciaenidae), and zooplankton (rotifers, cladocerans and copepods) in an isolated tropical lagoon in the floodplain of the Upper Paraná River, Brazil (region of Parque Nacional de Ilha Grande). We investigated spatial overlap between predators (planktivorous fish larvae) and prey (zooplankton), and tested which physical and chemical variables of the water are related to the DVM of the studied communities. We performed nocturnal...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vertical distribution; Spatial overlap; Predator-prey interactions; Rotifers; Microcrustaceans.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212015000200174
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Influence of food availability on the spatial distribution of juvenile fish within soft sediment nursery habitats ArchiMer
Tableau, Adrien; Brind'Amour, Anik; Woillez, Mathieu; Le Bris, H..
Soft sediments in coastal shallow waters constitute nursery habitats for juveniles of several flatfishes. The quality of a nursery is defined by its capacity to optimize the growth and the survival of juvenile fish. The influence of biotic factors, such as food availability, is poorly studied at the scale of a nursery ground. Whether food availability limits juvenile survival is still uncertain. A spatial approach is used to understand the influence of food availability on the distribution of juvenile fish of various benthic and demersal species in the Bay of Vilaine (France), a productive nursery ground. We quantified the spatial overlap between benthic macro-invertebrates and their predators (juvenile fish) to assess if the latter were spatially covering...
Tipo: Text Palavras-chave: Predator-prey relationship; Nursery habitat; Flatfish; Demersal fish; Benthic invertebrates; Spatial overlap; Food limitation.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00300/41100/40273.pdf
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