Retention of solute and particle markers in the digestive tract of chinchillas (<i>Chinchilla laniger</i>)

Hagen, Katharina B; Dittmann, M.; Ortmann, Sylvia; Kreuzer, Michael; Hatt, Jean‐Michel; Clauss, Marcus

doi:10.1111/jpn.12441

Cited by 14 publications

(5 citation statements)

References 34 publications

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“…For example, the nearly 1:1 sex ratio observed in the present study is similar to the ones reported by García [ 29 ]. In the same line, the mean weight at sacrifice of the animals in this study is in agreement with the values shown in previous studies on chinchillas [ 30 , 31 ], although slightly lower to those reported by Sportono et al [ 32 ]. Breeders have been selecting chinchillas mainly on size (which is directly associated to weight) and color, since these are the two characteristics that most influence the final prices of individual furs [ 19 ] and could explain the similarity in the variables studied across countries.…”

Section: Discussionsupporting

confidence: 93%

Determination of the Genetic Component of Fur-Chewing in Chinchillas (Chinchilla lanigera) and Its Economic Impact

González

Yáñez

Tadich

2018

Animals

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Simple SummaryMany chinchillas kept in captivity develop fur-chewing. This behavior does not only affect fur price, but most importantly it can be the result of an animal welfare problem. The causes of this behavior are not well understood and a genetic component could exist. This is why the aim of this study was to determine the genetic component and the effect of this behavior on fur price. The data from a commercial fur-farm was used, it included information on 10,196 chinchillas recorded between 1990 and 2011. The heritability of the behavior and its effect on fur price were determined. The results show a significant genetic variation in fur-chewing with an estimated heritability of 0.16. At the same time, the behavior had an important negative effect on fur price. The selection and management practices used in fur-farming should be improved in order to decrease the incidence of this behavior.AbstractFur-chewing is a common behavioral disorder developed by chinchillas kept in confinement that can indicate a past or present welfare problem. It also has a negative productive impact associated. The aim of this study was to determine the genetic component of fur-chewing, and the effect of this undesired behavior on fur price in a commercial fur-farming system of chinchillas (Chinchilla lanigera). The data for the analysis was derived from a commercial population of 10,196 chinchillas, recorded between the years 1990 and 2011. For determining differences in fur price according to presence of fur-chewing behavior, analysis of variance (ANOVA) was used, considering 3007 animals. For estimation of variance components of fur-chewing a sire-dam threshold (probit) mixed model was used, using data of 9, 033 individuals, and then heritability on the underlying liability scale was calculated. The analysis revealed a significant negative impact on fur price from fur-chewing chinchillas (p-value < 0.05). In addition, the study showed that fur-chewing presents significant genetic variation, with an estimated heritability of 0.16. The presentation of fur-chewing should be taken into account when selecting broodstock in these systems, in order to reduce the number of affected individuals.

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Section: Discussionsupporting

confidence: 93%

Determination of the Genetic Component of Fur-Chewing in Chinchillas (Chinchilla lanigera) and Its Economic Impact

González

Yáñez

Tadich

2018

Animals

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“…Anim. 2020; 69(1): 70-79 ducted by rogier [25], krishnamurti et al [17] and Głogowski et al [7], while hagen et al [10] analyzed mean digesta retention times in the chinchilla.…”

Section: Introductionmentioning

confidence: 99%

The effect of fish and mealworm larvae meals as alternative dietary protein sources on nutrient digestibility and gastrointestinal function in <i>Chinchilla lanigera</i>

et al. 2020

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Chinchillas are herbivores, but wild chinchillas may occasionally consume animal-based foods. The aim of this study was to determine the effect of fish meal (FM) and mealworm meal (MWM) included in complete pelleted diets on nutrient digestibility and gastrointestinal function in chinchillas. The experiment was performed on 24 male, divided into three groups, n=8. Control group (C) was fed a diet containing 10% soybean meal (SBM). In the experimental group FM, chinchillas received a diet containing 3% fish meal, and the diet administered to the experimental group MWM was supplemented with 4% dried mealworm larvae meal. The nutrient digestibility of diets was determined. At the end of the experiment animals were euthanized and their digestive tracts were removed to analyze gut activity. FM group animals were characterized by lower crude fat digestibility, whereas both alternative protein sources improved the digestibility of acid detergent fiber (ADF). A considerable increase in the activity of cecal intracellular and extracellular bacterial enzymes (in particular β-glucosidase, β-galactosidase and β-xylosidase) was noted in the FM group, which however did not increase the concentrations of short-chain fatty acids (SCFA). The inclusion of MWM in chinchilla diets shifted the bacterial fermentation site from the cecum (lowest SCFA pool) to the colon (highest SCFA pool), thus enabling to derive additional energy from less digestible dietary components. In conclusion, chinchilla diets can be supplemented with small amounts of animal protein such as fish meal and dried mealworm larvae meal.

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“…At 30–35 hr, the capybaras of the present study had similar MRT as that reported for domestic horses with comparable relative intake level (Clauss et al, ), adding to the evidence that body size should not be considered the main determinant of MRT across mammals (Clauss, Schwarm, Ortmann, Streich, & Hummel, ; Müller et al, ). Secondary peaks in marker excretion curves have been suggested as indicators of coprophagic events (Clauss, Besselmann, Schwarm, Ortmann, & Hatt, ; Hagen et al, ; Hagen, Müller, Ortmann, Kreuzer, & Clauss, ; Guerra Aldrigui, Nogueira‐Filho, Mendes, Souza Altino, Ortmann, et al, ). However, the degree to which the occurrence of these peaks depends on actually performed coprophagic behavior, diet, intake level, or individual characteristics such as defecation frequency, has not yet been investigated conclusively.…”

Section: Discussionmentioning

confidence: 99%

Digestive physiology of captive capybara (Hydrochoerus hydrochaeris)

et al. 2019

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The capybara (Hydrochoerus hydrochaeris), the largest living rodent, probably has a “mucus‐trap” colonic separation mechanism. To test this hypothesis, we measured the mean retention time of a solute marker (MRTSolute), 2 mm (MRT2 mm), 10 mm (MRT10 mm), and 20 mm (MRT20 mm) particle markers and nutrient digestibility in adult captive capybaras (27–52 kg body mass (BM), 2–11 yr). In addition, total gut fill and the selectivity factor (MRTSolute/MRT2 mm) were calculated, and mean faecal particle size and metabolic fecal nitrogen of captive capybaras were compared to those of free‐ranging specimens. Finally, we also measured methane production in one animal. The MRT2 mm (29.2 ± 8.2 hr) was different (p < 0.01) from MRTSolute (37.0 ± 13.1 hr), MRT10 mm (36.5 ± 8.2 hr), and MRT20 mm (35.1 ± 9.6 hr). The selectivity factor (1.26 ± 0.30) was in the range considered typical for a “mucus‐trap” colonic separation mechanism. The estimated total gut fill was 1.50 ± 0.37% and 1.73 ± 0.25% of BM calculated from the results of the 2‐mm and 10‐mm particle markers, respectively. The CH4 emission was 13.7 L/day. Captive capybaras had greater mean fecal particle size (0.44 ± 0.06 vs. 0.29 ± 0.05 mm, p < 0.001) and metabolic fecal nitrogen (65.5 ± 3.91 vs. 46.8 ± 10.5% of fecal nitrogen, p < 0.001) than free‐ranging capybaras. Organic matter digestibility decreased less steeply with increasing dietary crude fiber content in capybaras as compared to published data from rabbits or guinea pigs. Accordingly, the digestive physiology of the capybara is characterized by a comparatively high fiber digestibility, with a “mucus‐trap” colonic separation mechanism, allowing capybaras to thrive on forage‐only diets.

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Retention of solute and particle markers in the digestive tract of chinchillas (Chinchilla laniger)

Cited by 14 publications

References 34 publications

Determination of the Genetic Component of Fur-Chewing in Chinchillas (Chinchilla lanigera) and Its Economic Impact

Determination of the Genetic Component of Fur-Chewing in Chinchillas (Chinchilla lanigera) and Its Economic Impact

The effect of fish and mealworm larvae meals as alternative dietary protein sources on nutrient digestibility and gastrointestinal function in <i>Chinchilla lanigera</i>

Digestive physiology of captive capybara (Hydrochoerus hydrochaeris)

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