Age-related changes in the carcass yield and meat quality of male and female nutrias ( Myocastor coypus ) under intensive production system

Tůmová, E.; Chodová, Darina; Vlčková, Jana; Němeček, Tomáš; Uhlířová, Linda; Skřivanová, V.

doi:10.1016/j.meatsci.2017.06.003

Cited by 8 publications

(3 citation statements)

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“…Relationship between age and body weight in nutria (Myocastor coypus) males and females maintained either on an extensive (ERF) or intensive (IFR) feeding regime (lower figure represents longer time window). Grey data points without border represent literature data on intensively reared animals (Niedźwiadek et al, 1987a;Niedźwiadek and Piórkowska, 1993;Sirotkin et al, 2003;Cabrera et al, 2007;Beutling et al, 2008;Tůmová et al, 2015;Tůmová et al, 2017), the black and dotted lines represent growth curves for free-ranging males and females, respectively (Dixon et al, 1979), the small black symbols represent free-ranging animals from Sherfy et al (2006), and the crosses represent free-ranging animals of unknown sex from Peloquin (1969) in which an increase in body weight in the spring (1 yr after birth) from the extensive feeding regime (EFR) level to the intensive feeding regime (IFR) level is visible. production, but for general concepts on the determinate growth of endotherms.…”

Section: Discussionmentioning

confidence: 99%

“…In nutria meat production, the age at which the optimal slaughter weight is achieved depends Table 2. Length measurements of the digestive tract in nutria (Myocastor coypus) raised on an extensive or intensive feeding regime on feeding and rearing conditions (Tůmová et al, 2017). Two main feeding regimes are known and used in various countries that have or had an interest in the rabbit and nutria meat consumption.…”

Section: Discussionmentioning

confidence: 99%

“…For comparative purposes, data on age and BW were plotted against literature data on nutria from the wild (Peloquin, 1969;Dixon et al, 1979;Willner et al, 1980;Sherfy et al, 2006) and intensive rearing systems (Niedźwiadek et al, 1987a;Niedźwiadek and Piórkowska, 1993;Sirotkin et al, 2003;Cabrera et al, 2007;Beutling et al, 2008;Tůmová et al, 2015;Tůmová et al, 2017).…”

Section: Statistical Analysis and Interpretationmentioning

confidence: 99%

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Body size and gastrointestinal morphology of nutria (Myocastor coypus) reared on an extensive or intensive feeding regime

Głogowski

Pérez

Clauss

2018

Journal of Animal Science

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Although plasticity of growth rates is mainly associated with ectotherm species, it does occur in endotherms as well, but has not been documented systematically for many species. We compared the effect of two common types of feeding systems, differing in energetic value, on body size and gastrointestinal tract morphology in nutrias (Myocastor coypus). A total of 30 extensively (E) fed and 20 intensively (I) fed animals were used in the study. We noted significant effects of age, sex and feeding regime on body weight and length, with one-year-old females attaining 3.7 ±0.4 kg and 33.4 ±1.5 cm on E and 4.9 ±0.3 kg and 36.1 ±2.3 cm on I. A significant treatment-sex interaction indicated that treatment had a greater effect on the length growth in males (one-year-old males attaining 4.0 ±0.2 kg and 34.7 ±1.2 cm on E and 5.4 ±0.4 kg and 41.0 ±1.4 cm on I). The differences matched individual literature reports of free-ranging or intensively fed nutrias. The majority of gastrointestinal tract measurement results were only related to body weight, without additional effect of the diet regime, except for a higher small intestinal tissue weight on I (79 ±14 g vs 61 ±7 g on E). In contrast, the wet content weight of the stomach, caecum and the total gastrotinestinal tract was higher on E (196 ±34 g vs 164 ±51 g on I). Overall we observed strong influence of dietary regime on body development but not on digestive anatomy, indicating a distinct phenotypic flexibility in growth rates in nutrias.

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