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| Rocha, Aline Alves Ferreira da; Universidade Federal Rural de Pernambuco; Santos, Natália Carneiro Lacerda dos; Universidade Federal Rural de Pernambuco; Pinto, Gabriela de Araújo; niversidade Federal Rural de Pernambuco; Medeiros, Tatiane do Nascimento; Universidade Federal Rural de Pernambuco; Severi, William; Universidade Federal Rural de Pernambuco. |
| Fish diet studies contribute to understanding resource partitioning and community trophic structure. The present paper characterizes the diet of “peixe-cachorro” species Acestrorhynchus britskii and A. lacustris in Sobradinho reservoir, Bahia State, Brazil. Bimonthly samples (November 2006 to July 2008) were taken in the lotic, transition and lentic stretches of the reservoir, using gillnets overnight. A total of 899 A. britskii and 476 A. lacustris stomachs were analyzed, 70% of which were empty. Their content indicated the species are predominantly piscivorous, with 18 prey fish species identified. However, each prey occurred in a single month, except for Anchoviella vaillanti, recorded in 80% of months for A. bristski, and Tetragonopterus chalceus in... |
| Tipo: Alimentação |
Palavras-chave: 2.05.00.00-9 natural feeding; Peixe-cachorro; Piscivory Ecologia natural feeding; Peixe-cachorro; Piscivory. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/7240 |
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| Granzotti,Rafaela V.; Muniz,Carolina M.; Gomes,Luiz C.. |
| ABSTRACT Habitat complexity influences species diversity and regulates trophic interactions, mostly by increasing resource partitioning within habitats and providing refuge for prey. The influence of habitat complexity on more than two trophic levels is not well understood, mainly because behavioral modifications of prey and predator may influence the outcome of trophic interactions. Thus, we conducted a two-factor experiment with a three-level trophic chain: a piscivorous fish [Hoplerythrinus unitaeniatus (Spix & Agassiz 1829)], an invertivorous fish (Moenkhausia forestii Benine, Mariguela & C. de Oliveira, 2009) and an aquatic macroinvertebrate (Chironomidae larvae). We measured prey consumption in low, intermediate and high habitat complexity,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Macrophytes; Predator-prey interactions; Piscivory; Foraging behavior. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212018000100228 |
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| Mendes-Júnior,Raimundo Nonato Gomes; Sá-Oliveira,Júlio César; Vasconcelos,Huann Carllo Gentil; Costa-Campos,Carlos Eduardo; Araújo,Andrea Soares. |
| ABSTRACT In this study, the composition of the diet and the feeding activity of Electrophorus varii were evaluated. The influence of ontogeny and seasonality in these feeding parameters was also examined. Fish were collected in the Curiaú River Basin, Amazon, Brazil, from March 2005 to February 2006, during the rainy (January-June) and dry (July-December) seasons. Diet composition was characterized based on the analysis of stomach contents and feeding dynamics was assessed based on the Stomach Fullness Index (IR) calculated using stomach weight. Stomach content and RI data were grouped into four-cm size classes (40-80, 80-120, 120-160, and 160-200) and two seasonal periods (rainy and dry). The influence of ontogeny and seasonality in the diet was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amapá; Electric fish; Feeding Activity; Floodplain; Piscivory. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000300202 |
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| Catarino,Michel F; Zuanon,Jansen. |
| Monocirrhus polyacanthus (Polycentridae) is a remarkable leaf-mimicking fish that inhabits streams, lake and river margins along the Amazon basin. Despite its obvious predatory habits and being frequently present in the international aquarium trade, little is known about its diet under natural conditions. We examined 35 specimens of leaf fish (28.5-82.0 mm SL), of which 19 had food the stomach. Thirty-three preys were found in the stomach contents, 19 of which were measured (2.0-33.0 mm total length). Up to five preys were found in the stomach contents of a single leaf fish specimen. The diet of the leaf fish was constituted by fish (63.15% FO, n = 12) and invertebrates (36.3% FO, n = 4); fish and invertebrate preys occurred together in three stomachs... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Diet; Feeding behavior; Piscivory; Camouflage. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000100022 |
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