ORCID Profile
0000-0002-9865-9334
Current Organisation
Plant and Food Research
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Publisher: Elsevier BV
Date: 09-2021
Publisher: Hindawi Limited
Date: 12-2009
Publisher: Hindawi Limited
Date: 08-2010
Publisher: Wiley
Date: 20-03-2015
DOI: 10.1111/JFB.12658
Abstract: This study assessed the cannibalistic behaviour of juvenile barramundi Lates calcarifer and examined the relationship between prey size selection and energy gain of cannibals. Prey handling time and capture success by cannibals were used to estimate the ratio of energy gain to energy cost in prey selection. Cannibals selected smaller prey despite its capability of ingesting larger prey in iduals. In behavioural analysis, prey handling time significantly increased with prey size, but it was not significantly affected by cannibal size. Conversely, capture success significantly decreased with the increase of both prey and cannibal sizes. The profitability indices showed that the smaller prey provides the most energy return for cannibals of all size classes. These results indicate that L. calcarifer cannibals select smaller prey for more profitable return. The behavioural analysis, however, indicates that L. calcarifer cannibals attack prey of all size at a similar rate but ingest smaller prey more often, suggesting that prey size selection is passively orientated rather than at the predator's choice. The increase of prey escape ability and morphological constraint contribute to the reduction of intracohort cannibalism as fish grow larger. This study contributes to the understanding of intracohort cannibalism and development of strategies to reduce fish cannibalistic mortalities.
Publisher: Hindawi Limited
Date: 12-01-2015
DOI: 10.1111/ARE.12685
Publisher: FapUNIFESP (SciELO)
Date: 02-2011
DOI: 10.1590/S0100-204X2011000200011
Abstract: O objetivo deste trabalho foi avaliar o desempenho zootécnico e econômico de robalo-peva (Centropomus parallelus) alimentado com seis rações práticas, contendo diferentes concentrações proteicas. As dietas foram formuladas para conter as seguintes concentrações proteicas: 375, 395, 416, 438, 473 e 490 g kg-1. Cada dieta foi fornecida até a saciedade aparente duas vezes ao dia, por 90 dias. Ao final do experimento, a composição corporal dos peixes alimentados com as diferentes dietas não diferiu significativamente. O ganho em peso variou de 2,87±0,09 a 4,74±0,02 g, da menor para a maior concentração proteica. A concentração proteica de 490 g kg-1 levou à redução de 2,86±0,13 R$ kg-1 no custo médio de alimentação, ao aumento de 97,82±4,25% no índice de eficiência econômica, e à redução de 102,91±4,58% no índice de custo. A dieta com a maior concentração proteica e a relação energia roteína de 7,27 Mcal kg-1 promove os melhores índices zootécnicos e econômicos para juvenis de robalo-peva.
Publisher: Elsevier BV
Date: 11-2020
Publisher: Hindawi Limited
Date: 23-10-2019
DOI: 10.1111/ARE.14353
Publisher: Public Library of Science (PLoS)
Date: 12-12-2013
Publisher: Elsevier BV
Date: 07-2015
Location: Brazil
No related grants have been discovered for Flavio Ribeiro.