Histology of the skin and hair of the adult Chinchilla

Wilcox, Harry H.

doi:10.1002/ar.1091080304

Cited by 18 publications

(7 citation statements)

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“…Solitary hairs are found as vibrissae or on tail and pin nae . Follic ular layering is found only in vibrissae (Wilcox 1950) .…”

Section: General Characters Wild Chilean Chinchilla Frommentioning

confidence: 95%

“…Transition to adult hair occurs in captivity before 2 months of age. Epidermis of fetus, newborn, and 2-month-old animals resembles that of adult, but stratum granulosum is quite prominent, and stratum corneum is somewhat thinner (Wilcox 1950).…”

Section: Function Middle Ear Conductive Apparatus Of Domesticmentioning

confidence: 95%

“…A single guard hair, 10-15 IJ.m in diameter, is located at center of each clust er. Vibrissae are abundant, strong, long (100-130 mm), and emerge from single follicles (Wilcox 1950).…”

Section: General Characters Wild Chilean Chinchilla Frommentioning

confidence: 99%

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Chinchilla laniger

et al. 2004

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“…Solitary hairs are found as vibrissae or on tail and pin nae . Follic ular layering is found only in vibrissae (Wilcox 1950) .…”

Section: General Characters Wild Chilean Chinchilla Frommentioning

confidence: 95%

Section: Function Middle Ear Conductive Apparatus Of Domesticmentioning

confidence: 95%

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Chinchilla laniger

et al. 2004

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“…The chinchillas have very good insulation because of their coat which is quite unique both morphologically and histologically and compares very favourably with that of other rodents (Wilcox, 1950;Kazmierczak, 1962).…”

Section: Varia Tmentioning

confidence: 85%

Oxygen consumption and heat production in chinchillas

Dróżdż¹,

Górecki²

1967

Acta Theriol.

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[With 2 Tables and 1 Fig.]The oxygen consumption of chinchillas (average body weight=402.5 g) was studied in a closed-circuit system respirometer in ambient temperatures from 5 to 35°C. The thermoneutral zone of these rodents is between 20 and 30°C where the minimal resting metabolism rate averages 0.6812 ccm 0 2 /g/h. With the decrease of ambient temperature from 30 to 5°C the oxygen consumption increases by 85%>. Both the metabolism rate and the heat production are lower in the chinchilla than in other rodent species with similar body weight.The chinchillas (Chinchilla lanigcra Molina, 1782) have been thoroughly studied because of their great importance in fur industry. Recently they are often used in comparative physiological studies (White, 1964) but there are almost no data on the metabolism rate of chinchilla. Therefore it seemed appropriate to study the oxygen consumption and the chemical thermoregulation in this interesting rodent. MATERIAL AND METHODSMale chinchillas (Chinchilla lanigcra Molina, 1782) were used for the experiments. These animals were raised at a farm in the temperature of 15°C (± 5°C) and in natural illumination.The chemical thermoregulation was determined by the oxygen consumption in a modified Kalabukhov-Skvartzov respirometer (Grodzinski, 1961). In this apparatus the resting metabolism rate (RMR) was measured. The animals were not fasted before runs. For measurements the animals were placed in 9 liter chambers slightly limiting their movements. The oxygen consumption was determined in six ambient temperatures, every 5° from +5 to +35 c C. The total of 63 thirty minute runs was done on six individuals. The rectal temperature was measured before and after each run with a tele-thermistor thermometer. All experiments were done during the winter. The mean body weight of animals used was 402.5 g (from 330.0 to 498.0 g).The oxygen consumption was measured in ccm/g/h. From this the following values were computed: heat production in cal/g/h, intensity of chemical thermoregulation in per cent and the body insulation index from the formula of Hart. & Heroux (1955).[81]

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“…We do so with 17 mammals (Wilcox, 1950;McManus, 1974;Jenkins and Busher, 1979;Estes, 1980;Willner et al, 1980;Olsen, 1983;Conley and Porter, 1986;Pass and Freeth, 1993;Koprowski, 1994;Lariviere and Walton, 1998;Pasitschniak-Arts and Marinelli, 1998;Sidorovich et al, 1999;Mattern and McLennan, 2000;Scott et al, 2001;Fish et al, 2002;Valencak et al, 2003;Spotorno et al, 2004;Fedosenko and Blank, 2005;Mecklenburg et al, 2009;Dickerson et al, 2012) and 10 insects (Carlson and Chi, 1974 and data from a range of online SEM images). These measurements yield scalings given in Table 2.…”

Section: An Animal's Surface Areamentioning

confidence: 99%

Cleanliness is next to godliness: mechanisms for staying clean

Amador

2015

Journal of Experimental Biology

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Getting dirty is a fundamental problem, and one for which there are few solutions, especially across the enormous range of animal size. How do both a honeybee and a squirrel get clean? In this Review, we discuss two broad types of cleaning, considered from the viewpoint of energetics. Non-renewable cleaning strategies rely upon the organism as an energy source. Examples include grooming motions, wet-dog shaking or the secretion of chemicals. Renewable cleaning strategies depend on environmental sources of energy, such as the use of eyelashes to redirect incoming wind and so reduce deposition onto the eye. Both strategies take advantage of body hair to facilitate cleaning, and honeybees and squirrels, for example, each have around 3 million hairs. This hair mat increases the area on which particles can land by a factor of 100, but also suspends particles above the body, reducing their adhesion and facilitating removal. We hope that the strategies outlined here will inspire energy-efficient cleaning strategies in synthetic systems.

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Histology of the skin and hair of the adult Chinchilla

Cited by 18 publications

References 0 publications

Chinchilla laniger

Chinchilla laniger

Oxygen consumption and heat production in chinchillas

Cleanliness is next to godliness: mechanisms for staying clean

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