Diet and ecomorphological relationships of an endemic, species-poor fish assemblage in a stream in the Iguaçu National Park
This study investigated the morphological and dietary relationships of the fish assemblage in a stream with an endemic fauna and low species richness. The ichthyofauna was sampled quarterly from September 2011 to July 2012, through the electrofishing technique. The stomach contents of 419 individual...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Ictiologia
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| Series: | Neotropical Ichthyology |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000100245&lng=en&tlng=en |
| _version_ | 1828289972591919104 |
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| author | Mayara Pereira Neves Rosilene Luciana Delariva Luciano Lazzarini Wolff |
| author_facet | Mayara Pereira Neves Rosilene Luciana Delariva Luciano Lazzarini Wolff |
| author_sort | Mayara Pereira Neves |
| collection | DOAJ |
| description | This study investigated the morphological and dietary relationships of the fish assemblage in a stream with an endemic fauna and low species richness. The ichthyofauna was sampled quarterly from September 2011 to July 2012, through the electrofishing technique. The stomach contents of 419 individuals belonging to seven species were analyzed by the volumetric method, and the ecomorphological traits of 30 specimens of each species were estimated. The main food items consumed were detritus, aquatic and terrestrial insects, and other aquatic invertebrates. We observed low levels of trophic niche breadth and diet overlap between most species. The PCA scores indicated the occurrence of three ecomorphotypes. PCA axis 1 segregated at one extreme, species with dorsoventrally depressed bodies, longer caudal peduncles, and well-developed swimming fins; and at the other extreme, species with compressed bodies and peduncles, and relatively larger eyes and anal fins. PCA axis 2 segregated species with elongated bodies and ventrally oblique mouths. The partial Mantel test revealed a significant correlation between diet and morphology, indicating independence from the phylogeny. The patterns observed suggest that the low richness did not result in a broadening of the species' trophic niches, or in the absence of some of the main ecomorphotypes expected. |
| first_indexed | 2024-04-13T10:29:37Z |
| format | Article |
| id | doaj.art-7350c9037fb54d04b91d90210e107168 |
| institution | Directory Open Access Journal |
| issn | 1982-0224 |
| language | English |
| last_indexed | 2024-04-13T10:29:37Z |
| publisher | Sociedade Brasileira de Ictiologia |
| record_format | Article |
| series | Neotropical Ichthyology |
| spelling | doaj.art-7350c9037fb54d04b91d90210e1071682022-12-22T02:50:13ZengSociedade Brasileira de IctiologiaNeotropical Ichthyology1982-022413124525410.1590/1982-0224-20140124S1679-62252015000100245Diet and ecomorphological relationships of an endemic, species-poor fish assemblage in a stream in the Iguaçu National ParkMayara Pereira NevesRosilene Luciana DelarivaLuciano Lazzarini WolffThis study investigated the morphological and dietary relationships of the fish assemblage in a stream with an endemic fauna and low species richness. The ichthyofauna was sampled quarterly from September 2011 to July 2012, through the electrofishing technique. The stomach contents of 419 individuals belonging to seven species were analyzed by the volumetric method, and the ecomorphological traits of 30 specimens of each species were estimated. The main food items consumed were detritus, aquatic and terrestrial insects, and other aquatic invertebrates. We observed low levels of trophic niche breadth and diet overlap between most species. The PCA scores indicated the occurrence of three ecomorphotypes. PCA axis 1 segregated at one extreme, species with dorsoventrally depressed bodies, longer caudal peduncles, and well-developed swimming fins; and at the other extreme, species with compressed bodies and peduncles, and relatively larger eyes and anal fins. PCA axis 2 segregated species with elongated bodies and ventrally oblique mouths. The partial Mantel test revealed a significant correlation between diet and morphology, indicating independence from the phylogeny. The patterns observed suggest that the low richness did not result in a broadening of the species' trophic niches, or in the absence of some of the main ecomorphotypes expected.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000100245&lng=en&tlng=enFeeding ecologyIguaçu River basinMorphotypesNiche overlapStream fishes |
| spellingShingle | Mayara Pereira Neves Rosilene Luciana Delariva Luciano Lazzarini Wolff Diet and ecomorphological relationships of an endemic, species-poor fish assemblage in a stream in the Iguaçu National Park Neotropical Ichthyology Feeding ecology Iguaçu River basin Morphotypes Niche overlap Stream fishes |
| title | Diet and ecomorphological relationships of an endemic, species-poor fish assemblage in a stream in the Iguaçu National Park |
| title_full | Diet and ecomorphological relationships of an endemic, species-poor fish assemblage in a stream in the Iguaçu National Park |
| title_fullStr | Diet and ecomorphological relationships of an endemic, species-poor fish assemblage in a stream in the Iguaçu National Park |
| title_full_unstemmed | Diet and ecomorphological relationships of an endemic, species-poor fish assemblage in a stream in the Iguaçu National Park |
| title_short | Diet and ecomorphological relationships of an endemic, species-poor fish assemblage in a stream in the Iguaçu National Park |
| title_sort | diet and ecomorphological relationships of an endemic species poor fish assemblage in a stream in the iguacu national park |
| topic | Feeding ecology Iguaçu River basin Morphotypes Niche overlap Stream fishes |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000100245&lng=en&tlng=en |
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