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Registros recuperados: 7
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Contrasting perception of fish trophic level from stomach content and stable isotope analyses: A Mediterranean artificial reef experience ArchiMer
Cresson, Pierre; Ruitton, Sandrine; Ourgaud, Melanie; Harmelin-vivien, Mireille.
A large complex of artificial reefs was deployed in the Bay of Marseilles, North-Western Mediterranean, for the enhancement of commercial fisheries stocks. Carbon and nitrogen stable isotope and stomach content analyses were performed on 23 fish species collected on the artificial reefs to assess their trophic position and feeding behaviour. Results indicated that fish diets were not modified on the artificial reefs compared to natural environments, nor was the structure of their trophic network. Artificial reefs, with their complex design, provide diverse and abundant food sources for fishes. Ranges of delta C-13 and delta N-15 of artificial reef fishes were comparable to those recorded in natural Mediterranean environments, with a similar trophic...
Tipo: Text Palavras-chave: Artificial reefs; Fish diet; NW Mediterranean; Stable isotopes; Stomach content; Trophic level.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00186/29708/28188.pdf
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Food spectrum and trophic structure of the ichthyofauna of Corumbá reservoir, Paraná river Basin, Brazil Neotropical Ichthyology
Luz-Agostinho,Karla D. G.; Bini,Luis M.; Fugi,Rosemara; Agostinho,Angelo A.; Júlio Jr.,Horácio F..
In this paper we evaluate plasticity of fish concerning diet. We expect that sampling over a large temporal and spatial scale, including environmental changes such as impoundments, will allow us to cover most of the diet plasticity. We also evaluate the efficacy of ordination method in discriminating trophic groups based on fish species diet. Data were obtained from 17 sampling stations sampled monthly from March/96 to February/99 in the Corumbá river drainage, before and after the formation of the Corumba reservoir. Diet was determined analysing 9,177 stomach contents from 64 fish species. Trophic categories were discriminated by a non-hierarchic grouping analysis named k-means, applied to diet data. Most of the species presented great trophic plasticity,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish diet; Feeding plasticity; Resources availablility.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000100005
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Nutrient Composition of some Tropical Legumes Capable of Substituting Fish Meal in Fish Diets JARTS
Ogunji, Johnny O.; Wirth, Manfred; Osuigwe, Donald I..
Sword beans (Canavalia gladiata); Jackbean (Canavalia enciformis (L)); Mucuna bean (Mucuna pruriens); Mucuna cochiunensis; Bambara (Voandzeia subterranea) and Limabean (Phaseolus lunatus) are the tropical legumes considered in this paper. They have been used in the feed of ruminants but very scarcely considered in fish feed. Information about their nutrient composition are also scarce. Results from this study show that the protein contents of the test seeds ranged from 19.94% dry matter (DM), (Bambara) to 36.95% DM (Mucuna cochiunensis). Considering the high protein level required by fish for maximum growth and the presence of some ANFs, the seeds may not be able to be used in isolation without supplementing them with other food stuffs having higher...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aquaculture and fishery sciences Swordbean; Canavalia gladiata; Jackbean; Canavalia enciformis; Mucunabean; Mucuna pruriens; Bambara; Voandzeia subterranea; Limabean; Phaseolus lunatus; Fish diet.
Ano: 2003 URL: http://www.jarts.info/index.php/jarts/article/view/23
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Régime alimentaire de poissons carnivores des récifs coralliens de Nouvelle Calédonie ArchiMer
Kulbicki, M; Bozec, Ym; Labrosse, Pierre; Letourneur, Y; Mou-tham, G; Wantiez, L.
A total of 212 carnivorous coastal fish species from New Caledonia, represented by 7335 individuals, were analysed for their diet. Fifty two prey items were identified and later grouped into broader taxonomic categories refered as "prey types". For each fish species 6 biological traits were defined: maximum adult size, major biotope, schooling behaviour, home range, nycthemeral behaviour, degree of crypticity. A general linear model was fit to the diet data taking into account these traits, and depth of capture and fish family. This model was applied to the average number of prey types/stomach and to the volume of 5 prey types: nekton, crustaceans. molluscs, echinoderms, worms. A second analysis was performed on the effect of observed size on diet...
Tipo: Text Palavras-chave: Coral reefs; Fish diet; Trophic level; Indian ocean.
Ano: 2005 URL: https://archimer.ifremer.fr/doc/00608/71965/70663.pdf
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The role of vegetated areas on fish assemblage of the Paraná River floodplain: effects of different hydrological conditions Neotropical Ichthyology
Neiff,Juan José; Neiff,Alicia Poi de; Verón,Marta B. Canón.
In this paper, we analyze the changes in composition and abundance of fish assemblages in seven vegetated floodplain wetlands with different connectivity across different hydrologic conditions: after a prolonged connection of the floodplain with the main channel, during receding water, and after a prolonged isolation. We also investigated the size and abundance of large-sized migratory species found in these wetlands and the food resources exploited by the dominant fish. Fishes were captured by diurnal seining (8.0 m x 1.50 m, 5 mm mesh) along macrophyte banks. Despite the high total number of species registered (100), sample species richness varied between 7 and 31, depending on the sampling site and the sampling date. Cluster analysis indicated low...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish diversity; Fish diet; Floodplain wetlands; Aquatic plants.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000100006
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Trophic guilds of fishes in sandbank habitats of a Neotropical river Neotropical Ichthyology
Pereira,Poliana Ribeiro; Agostinho,Carlos Sérgio; Oliveira,Rafael José de; Marques,Elineide Eugênio.
The objective of this study was to characterize the trophic structure of the community of fishes exploiting riverine sandbank habitats. Collections were carried out during the period of October 1999 to December 2003, on six sand banks in the upper and middle portions of the Tocantins River drainage basin in central Brazil. The availability of food resources was evaluated based on the volume of the items present in the stomachs of all species. A total of 2,127 stomachs of fish belonging to 50 species were analyzed. Nine main trophic guilds grouped the local ichthyofauna according to diet. Aquatic-origin items were the preferred source for 55.5% of the groups analyzed, whereas terrestrial-origin items composed 44.4%. Items of undetermined origin (detritus...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Feeding plasticity; Fish diet; Resource availability.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000300019
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Use of food resources by the fish fauna of a small reservoir (rio Jordão, Brazil) before and shortly after its filling Neotropical Ichthyology
Loureiro-Crippa,Valdirene E.; Hahn,Norma S..
The construction of dams brings about changes in the course of a river, which directly or indirectly affect the fish fauna. Alterations in the food resources available to the fish favor some species and deter others. In addition to the implications originating from damming, Jordão Reservoir has a characteristically large number of endemic species that, because of the impacts they have undergone, run the risk of extinction. In this study, we investigate the feeding flexibility of the fishes faced with alterations in the food supply through the assessment of the diet and trophic organization of the fish fauna (before and after the damming). Diet was determined analyzing 1,861 stomach contents from 27 fish species. Eight of this species were not caught after...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish diet; Feeding flexibility; Resources availability; Impacted environment.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000300007
Registros recuperados: 7
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