Composição corporal e exigências líqüidas em energia e proteína para ganho em peso de chinchilas (Chinchilla lanigera)

Abstract

RESUMOFoi avaliada a composição da pele, do corpo sem extremidades, das extremidades corporais e a composição corporal total e estimadas as exigências líquidas de energia e proteína para ganho de peso da espécie Chinchilla lanigera. Foram utilizados 18 animais, tendo sido abatidos seis animais juvenis com 40 dias de idade e 12 animais adultos (seis machos e seis fêmeas) com 750 dias de idade. Foi feito um teste de comparação de médias para as composições das diferentes frações do corpo nas diferentes categorias animal. Foram ajustadas equações logarítmicas da quantidade corporal de proteína, gordura e energia, em função do logaritmo do peso corporal vazio. As exigências líquidas em proteína e energia para ganho de peso foram obtidas por derivação das equações de predição da composição corporal em proteína e energia. Foi verificada uma maior proporção (P<0,05) de extremidades corporais por parte dos animais juvenis em relação aos adultos. Entretanto, as proporções de pele e de corpo sem extremidades não diferiram (P>0,05) entre as categorias. As quantidades de matéria seca, proteína e gordura corporal, alteraram-se com o avanço da idade. Os animais juvenis apresentaram menor (P<0,05) percentual de matéria seca e extrato etéreo quando comparados com os adultos. As exigências líquidas de proteína decresceram, enquanto que as exigências energéticas se elevaram com o aumento da idade e peso dos animais. Termos para indexação:Corpo vazio, exigências nutricionais, pele. ABSTRACTThe composition of skin, body without extremities (head, feet and tale) and extremities and composition of total body of chinchilla was determined and the net requirements for energy and protein were estimated. Eighteen animals (6 males and 6 females, 750 days old and 6 young animals 40 days old) were slaughtered. Mean values for the different body fractions and for animal categories were compared, and logarithmic equations were adjusted for protein, fat and energy content of the body as a function of empty body weight. Net requirements for body weight gain were obtained by derivation of those equations. Higher proportion of extremities was verified in young animals than in adults (P<0.05) but the proportions of skin and body without extremities was not different between animals categories (P>0.05) Body contents of dry matter, protein and fat changed with age, young animals had less dry matter and fat than the adults (P<0.05). Net requirements for protein decreased and for energy increased with increase animal s age and body weight.

Dinomys branickii Peters, 1873 (Rodentia, Dinomyidae): consumption and food preference in captivity

“…The viability of captive breeding is limited by gaps in our knowledge of nutritional requirements of this species, and this information is crucial for maintenance of growth, development and reproduction (CAVALCANTE et al, 2005;ANTONIO et al, 2007). Establishing a balanced diet is important for promoting the health, well-being, longevity, and reproductive success of captive animals, since adequate and appropriate nutrition is essential to meet metabolic needs and maintain vital functions (CARCIOFI;OLIVEIRA, 2007).…”

“…Establishing a balanced diet is important for promoting the health, well-being, longevity, and reproductive success of captive animals, since adequate and appropriate nutrition is essential to meet metabolic needs and maintain vital functions (CARCIOFI;OLIVEIRA, 2007). Development of an effective ex-situ production system will also require knowledge of nutritional requirements for the species (ANTONIO et al, 2007).…”

“…This lack of knowledge may complicate breeding in captivity and the development of conservation strategies. However, recent studies have elucidated some previously unknown aspects of the digestive system physiology of some wild rodents as well as requirements and preferences for nutrition and food, including Hydrochoerus hydrochaeris (RODRIGUES et al, 2006), Chinchilla laniger (ANTONIO et al, 2007), Cuniculus paca (LASKA et al, 2003;ZUCARATTO et al, 2010) and Dasyprocta leporina (CAVALCANTE et al, 2005;McWILLIAMS, 2009). There have been advances in the composition of industrialized food for Cavia porcellus, Mus musculus and C. laniger due to their popularity as pets.…”