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Master thesis . 2018
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Utilização de alimentos alternativos na dieta do coelho : gordura de insetos vs gordura de linho

Authors: Cardoso, Cristóvão dos Santos;

Utilização de alimentos alternativos na dieta do coelho : gordura de insetos vs gordura de linho

Abstract

Atualmente, a nível mundial, configura-se a perspetiva de um aumento de consumo de insetos tanto pelos humanos como pelos animais, pelo que se considera importante a realização de diferentes estudos, nomeadamente da sua utilização nas dietas animais. Com o objetivo de comparar o efeito do uso de duas gorduras suplementadas na dieta de coelhos, nomeadamente de origem animal e vegetal (óleo de Hermetia illucens, e de linho, respetivamente), foram formulados 4 regimes alimentares com teor baixo (5%) e com teor alto (8%) de gordura, para cada fonte de gordura adicionada, e distribuídos a 48 coelhos (12 x 4) com 35 dias (recém desmamados) alojados em gaiolas de digestibilidade. Os animais tiveram acesso ad libitum a alimento e água durante as 5 semanas do perído experimental, sendo abatidos aos 70 dias de idade. Foram avaliados os resultados zootécnicos, sem diferenças significativas (P>0,05) e recolhidas e analisadas as fezes na 4ª semana do ensaio, para se avaliar a digestibilidade aparente das dietas. Os pesos iniciais (1047g) foram uniformes e os finais (2405g) foram semelhantes em todos os grupos. Verificou-se que há um efeito muito significativo na natureza da gordura (P0,05) nos pesos do aparelho digestivo, fígado, gorduras peri-renal e inter-escapular, apenas um efeito no peso do estômago vazio (P=0,006), maior nos regimes com óleo de insetos, provavelmente devido a uma maior retenção de alimento durante o período experimental. Entre os resultados colorimétricos obtidos, não parecem haver diferenças significativas, excepto uma tonalidade mais vermelha na carne dos animais dos regimes com óleo de insetos (P=0,047). De acordo com estes resultados a gordura de insetos pode ser utilizada na alimentação do coelho, apenas com alguma perda na digestibilidade da matéria seca e orgânica, mas não afetando o crescimento nem o rendimento da carcaça.

ABSTRACT - Use of alternative foods in the rabbit diet: insect oil vs flax oil - Currently, the world-wide perspective is an increase in the consumption of insects by both humans and animals. Therefore, it is considered important to carry out different studies including their use in animal diets. In order to compare the effect of two fat supplements on the rabbit diet, from animal and vegetable origin (Hermetia illucens oil, and flax/lindseed oil, respectively), four dietary regimens with low (5%) and high (8%) fat content, for each fat souce added, and distributed to 48 rabbits (12 x 4) with 35 days of age (recently weaned) housed in digestibility cages. The animals had access ad libitum to food and water during the 5 weeks of the experimental period, being slaughtered at 70 days of age. The zootechnical results were evaluated, without significant differences (P> 0.05) and feces were collected in the 4th week oh the trial, and analyzed to evaluate the apparent digestibility of the diets. The initial weights (1047g) were uniform and the final weights (2405g) were similar in all groups. It was verified that there is a very significant effect on the nature of fat (P 0.05) in digestive tract, liver, peri-renal and inter-scapular fat weights, only an effect on empty stomach weight (P = 0.006), higher in insect oil regimes, probably due to higher feed retention during the experimental period. Among the colorimetric results obtained, there appear to be no significant differences, except for a reddish in meat of the animals who ate insect oil regimes (P = 0.047). According to these results, insect fat can be used on rabbit diet, with only some slightly lower digestibility in dry matter and organic matter, but not affecting the growth or carcass yield.

Dissertação de Mestrado em Engenharia Zootécnica/Produção Animal

N/A

Country
Portugal
Keywords

coelho, insetos, gordura, flax, fat, rabbit, insects, oil, óleo, linho

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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