| Registro completo |
| Provedor de dados: |
Neotropical Ichthyology
|
| País: |
Brazil
|
| Título: |
Fish diet composition in permanent and semi-permanent pools in tropical wetlands of the Yucatan Peninsula
|
| Autores: |
Hinojosa-Garro,Demián
Arceo-Gómez,Joselito
Zambrano,Luis
Escalera-Vázquez,Luis H.
|
| Data: |
2013-01-01
|
| Ano: |
2013
|
| Palavras-chave: |
Campeche
Feeding ecology
Freshwater fish
Mexico
Petenes Biosphere Reserve
|
| Resumo: |
We compared fish diet composition between permanent (P) and semi-permanent (SP) pools in Petenes Biosphere Reserve (PBR), Campeche. A total of 445 gut contents were examined to determine stomach relative fullness (RF), fish diet as index of niche breadth (INB) and diet overlap. In SP pools, species showed a RF of 1.66 (57.20 % empty stomachs) whereas in P pools, the RF was 2.91 (31.16%). We classified fish diet into six trophic groups: detritivorous, herbivorous-detritivorous, insectivorous, piscivorous, omnivorous and malacophagous. Species in P pools were found to be specialist. Conversely, species present in both habitats shifted to generalist patterns. There was a 54.0% dissimilarity in fish diet composition between pools. From all items identified, detritus (21.33% of the total dissimilarity), aquatic and terrestrial invertebrates (12.31%), fish remains (10.29%), plant remains (7.37%), and crustaceans (2.74%) distinguished diets between pools. Significant diet overlaps (>0.6) and low INB values (<0.3) were observed in P pools, whereas in SP pools, intermediate-low diet overlaps (<0.4) and higher INB values (>0.5) were observed. In SP pools seasonality had a strong effect on fish diet, increasing the frequency of food items such as terrestrial insects, amphipods and arachnids, during the rainy season while P pools showed lower variation. Thus, fish trophic habits appear to be regulated by pools hydrology.
|
| Tipo: |
Info:eu-repo/semantics/article
|
| Idioma: |
Inglês
|
| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000400881
|
| Editor: |
Sociedade Brasileira de Ictiologia
|
| Relação: |
10.1590/S1679-62252013000400016
|
| Formato: |
text/html
|
| Fonte: |
Neotropical Ichthyology v.11 n.4 2013
|
| Direitos: |
info:eu-repo/semantics/openAccess
|
|
