Hybrid fish model (Pseudoplatystoma reticulatum♀ × Leiarius marmoratus♂) to study feeding behaviour: protein source self‐selection and demand‐feeding rhythms

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorFortes‐Silva, Rodrigo-
Autor(es): dc.creatorCosta, Leandro S.-
Autor(es): dc.creatorPaulino, Renan R.-
Autor(es): dc.creatorRodrigues, Edgar J. D.-
Autor(es): dc.creatorSanchez‐Vazquez, Francisco J.-
Autor(es): dc.creatorRosa, Priscila V.-
Data de aceite: dc.date.accessioned2026-02-09T12:07:57Z-
Data de disponibilização: dc.date.available2026-02-09T12:07:57Z-
Data de envio: dc.date.issued2019-02-22-
Data de envio: dc.date.issued2019-02-22-
Data de envio: dc.date.issued2017-07-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br//handle/1/32954-
Fonte completa do material: dc.identifierhttps://onlinelibrary.wiley.com/doi/full/10.1111/are.13196-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1155000-
Descrição: dc.descriptionWe report feeding studies on hybrid fish (carnivorous × omnivorous) to determine the interactions between protein sources during diet selection trials. We also examined behavioural rhythms (feeding and locomotor activity) using a self‐feeding system mounted with a feeder connected to an infrared photocell. Twenty fish (28.20 ± 0.05 g) were distributed in four aquariums (50 L each). First, the system was tested to evaluate the adaptation of catfish (Pseudoplatystoma reticulatum × Leiarius marmoratus) to self‐feeding (step I). During this 28‐day period, feeding and locomotor activity rhythms were recorded. In the second step, to analyse protein self‐selection, a group of 20 fish (19.10 ± 0.05 g) was released in the aquaria. The hybrid catfish were given free access to diets (soya bean meal protein (SP) vs. bovine liver protein (BP)) through two self‐feeders. The same procedure was used for (SP) vs. fish meal protein (FP). The catfish learned to activate the feeders to demand a daily feed amount equivalent to 1.8% of their body weight. The fish performed most of their actions (89.0% feeding activity and 94.1 0% locomotor activity) in the night. The diet choice by the catfish became clearer with a significantly lower intake of BP (0.37 g per 100 g body weight, 24.6%) vs. SP (1.06 g per 100 g body weight, 75.4%) and SP (0.61 g per 100 g body weight, 38.9%) vs. FP (0.91 g per 100 g body weight, 61.1%). These findings should be considered when discussing feeding behaviour, nutritional targets and protein sources for future aquaculture feeds.-
Idioma: dc.languageen-
Publicador: dc.publisherWiley-
Direitos: dc.rightsrestrictAccess-
???dc.source???: dc.sourceAquaculture Research-
Palavras-chave: dc.subjectFeeding schedule-
Palavras-chave: dc.subjectNutritional target-
Palavras-chave: dc.subjectProtein source-
Palavras-chave: dc.subjectHorário de alimentação-
Palavras-chave: dc.subjectAlvo nutricional-
Palavras-chave: dc.subjectFonte de proteína-
Título: dc.titleHybrid fish model (Pseudoplatystoma reticulatum♀ × Leiarius marmoratus♂) to study feeding behaviour: protein source self‐selection and demand‐feeding rhythms-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

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