Aquatic insects as the main food resource of fish the community in a Neotropical reservoir
We evaluated the feeding of fish species of the Nova Avanhandava Reservoir, low Tietê River, São Paulo State, Brazil. Fishes were collected in two stretches of the reservoir: Santa Bárbara (14 samples) and Bonito (two samples) between September 2002 and March 2004, using gill and seining nets. The r...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Ictiologia
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| Series: | Neotropical Ichthyology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000400020&lng=en&tlng=en |
| _version_ | 1818952752056762368 |
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| author | Ana Paula Vidotto-Magnoni Edmir Daniel Carvalho |
| author_facet | Ana Paula Vidotto-Magnoni Edmir Daniel Carvalho |
| author_sort | Ana Paula Vidotto-Magnoni |
| collection | DOAJ |
| description | We evaluated the feeding of fish species of the Nova Avanhandava Reservoir, low Tietê River, São Paulo State, Brazil. Fishes were collected in two stretches of the reservoir: Santa Bárbara (14 samples) and Bonito (two samples) between September 2002 and March 2004, using gill and seining nets. The results of stomach contents analysis were expressed with the frequency of occurrence and gravimetric method, combined in the Alimentary Index (AI). The 20 species studied consumed 52 food items, grouped in 10 food categories: aquatic insects, terrestrial insects, crustaceans, fish, macroinvertebrates, microcrustaceans, algae, vegetal matter, detritus/sediment and scales. The aquatic insects (mainly Chironomidae, Odonata and Ephemeroptera) were the most common food resources, consumed by 18 species. The diet composition of the community (species grouped) indicated that the dominant food category in the diet of fishes was aquatic insects (AI = 77.6%), followed by crustaceans (AI = 7.1%). Four trophic guilds were identified according a cluster analysis (Pearson distance): insectivorous (10 species), omnivorous (4 species), detritivorous (3 species) and piscivorous/carcinophagous (3 species). Despite the highest number of species, the insectivorous guild was responsible for more than 80% in captures in number and biomass (CPUEn and CPUEb). The low values of niche breadth presented by all species, along with the low values of diet overlap between species pairs indicate a high degree of food resources partitioning among species. The aquatic insects, despite being the main food resource of insectivorous fishes, also complemented the diet of other species, which demonstrate the importance of this food resource for the fish community, sustaining a high diversity, abundance and biomass of fishes. |
| first_indexed | 2024-12-20T09:55:22Z |
| format | Article |
| id | doaj.art-1cee95e0d6d946fe86de6c032ba47ce6 |
| institution | Directory Open Access Journal |
| issn | 1982-0224 |
| language | English |
| last_indexed | 2024-12-20T09:55:22Z |
| publisher | Sociedade Brasileira de Ictiologia |
| record_format | Article |
| series | Neotropical Ichthyology |
| spelling | doaj.art-1cee95e0d6d946fe86de6c032ba47ce62022-12-21T19:44:29ZengSociedade Brasileira de IctiologiaNeotropical Ichthyology1982-02247470170810.1590/S1679-62252009000400020S1679-62252009000400020Aquatic insects as the main food resource of fish the community in a Neotropical reservoirAna Paula Vidotto-Magnoni0Edmir Daniel Carvalho1Universidade Estadual PaulistaUniversidade Estadual PaulistaWe evaluated the feeding of fish species of the Nova Avanhandava Reservoir, low Tietê River, São Paulo State, Brazil. Fishes were collected in two stretches of the reservoir: Santa Bárbara (14 samples) and Bonito (two samples) between September 2002 and March 2004, using gill and seining nets. The results of stomach contents analysis were expressed with the frequency of occurrence and gravimetric method, combined in the Alimentary Index (AI). The 20 species studied consumed 52 food items, grouped in 10 food categories: aquatic insects, terrestrial insects, crustaceans, fish, macroinvertebrates, microcrustaceans, algae, vegetal matter, detritus/sediment and scales. The aquatic insects (mainly Chironomidae, Odonata and Ephemeroptera) were the most common food resources, consumed by 18 species. The diet composition of the community (species grouped) indicated that the dominant food category in the diet of fishes was aquatic insects (AI = 77.6%), followed by crustaceans (AI = 7.1%). Four trophic guilds were identified according a cluster analysis (Pearson distance): insectivorous (10 species), omnivorous (4 species), detritivorous (3 species) and piscivorous/carcinophagous (3 species). Despite the highest number of species, the insectivorous guild was responsible for more than 80% in captures in number and biomass (CPUEn and CPUEb). The low values of niche breadth presented by all species, along with the low values of diet overlap between species pairs indicate a high degree of food resources partitioning among species. The aquatic insects, despite being the main food resource of insectivorous fishes, also complemented the diet of other species, which demonstrate the importance of this food resource for the fish community, sustaining a high diversity, abundance and biomass of fishes.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000400020&lng=en&tlng=enFish feedingTrophic ecologyResource availabilityZoobenthos |
| spellingShingle | Ana Paula Vidotto-Magnoni Edmir Daniel Carvalho Aquatic insects as the main food resource of fish the community in a Neotropical reservoir Neotropical Ichthyology Fish feeding Trophic ecology Resource availability Zoobenthos |
| title | Aquatic insects as the main food resource of fish the community in a Neotropical reservoir |
| title_full | Aquatic insects as the main food resource of fish the community in a Neotropical reservoir |
| title_fullStr | Aquatic insects as the main food resource of fish the community in a Neotropical reservoir |
| title_full_unstemmed | Aquatic insects as the main food resource of fish the community in a Neotropical reservoir |
| title_short | Aquatic insects as the main food resource of fish the community in a Neotropical reservoir |
| title_sort | aquatic insects as the main food resource of fish the community in a neotropical reservoir |
| topic | Fish feeding Trophic ecology Resource availability Zoobenthos |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000400020&lng=en&tlng=en |
| work_keys_str_mv | AT anapaulavidottomagnoni aquaticinsectsasthemainfoodresourceoffishthecommunityinaneotropicalreservoir AT edmirdanielcarvalho aquaticinsectsasthemainfoodresourceoffishthecommunityinaneotropicalreservoir |