Bilateral adrenalectomy induces early onset of summer fur growth in mink (Mustela vison)

Rose, Jack

doi:10.1016/0742-8413(95)00043-n

Cited by 6 publications

(4 citation statements)

References 33 publications

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“…Literature values for growth of mink hair are scarce. From a study by Rose , we estimated a value of 0.56 mm/d in female mink using the control data shown in Figure of that study. Rouvinen‐Watt and Harri reported that hair growth averaged 0.26 mm/d in all newborn mink kits, with the growth rate for the males being slightly higher (∼0.33 mm/d).…”

Section: Discussionmentioning

confidence: 99%

Methylmercury accumulation and elimination in mink (Neovison vison) hair and blood: Results of a controlled feeding experiment using stable isotope tracers

Wang

Evans

Hickie

et al. 2014

Environmental Toxicology and Chemistry

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Concentrations of metals in hair are used often to develop pharmacokinetic models for both animals and humans. Although data on uptake are available, elimination kinetics are less well understood; stable isotope tracers provide an excellent tool for measuring uptake and elimination kinetics. In the present study, methylmercury concentrations through time were measured in the hair and blood of mink (Neovison vison) during a controlled 60-d feeding experiment. Thirty-four mink were fed a standard fish-based diet for 14 d, at the end of which (day 0), 4 mink were sacrificed to determine baseline methylmercury (MeHg) concentrations. From day 0 to day 10, the remaining mink were fed a diet consisting of the base diet supplemented with 0.513 ± 0.013 µg Me(199) Hg/g and 0.163 ± 0.003 µg Me(201) Hg/g. From day 10 to day 60, mink were fed the base diet supplemented with 0.175 ± 0.024 µg Me(201) Hg/g. Animals were sacrificed periodically to determine accumulation of Me(201) Hg in blood and hair over the entire 60-d period and the elimination of Me(199) Hg over the last 50 d. Hair samples, collected from each mink and cut into 2.0-mm lengths, indicate that both isotopes of MeHg appeared in the hair closest to the skin at approximately day 10, with concentrations in the hair reaching steady state from day 39 onward. The elimination rate of Me(199) Hg from the blood was 0.05/d, and the ratio of MeHg in the hair to blood was 119. A large fraction of MeHg (22% to >100%) was stored in the hair, suggesting that in fur-bearing mammals the hair is a major route of elimination of MeHg from the body.

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Section: Discussionmentioning

confidence: 99%

Methylmercury accumulation and elimination in mink (Neovison vison) hair and blood: Results of a controlled feeding experiment using stable isotope tracers

Wang

Evans

Hickie

et al. 2014

Environmental Toxicology and Chemistry

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“…Mink were housed individually, fed a mixture of chicken and fish by‐products daily and received water ad libitum. Animals were exposed to a daily photoperiod approximating natural photoperiodic changes for southeastern Idaho (Rose ) at room temperatures between 22‐28°C. All procedures involving animal care, surgery and hormone treatments were approved by the Institutional Animal Care and Use Committee of ISU, and conformed to the Guide for the Care and Use of Laboratory Animals (Protocol #6410909).…”

Section: Methodsmentioning

confidence: 99%

Estradiol stimulates glycogen synthesis whereas progesterone promotes glycogen catabolism in the uterus of the American mink (Neovison vison)

Bowman

Rose

2016

Animal Science Journal

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Glycogen synthesis by mink uterine glandular and luminal epithelia (GE and LE) is stimulated by estradiol (E2) during estrus. Subsequently, the glycogen deposits are mobilized to near completion to meet the energy requirements of pre-embryonic development and implantation by as yet undetermined mechanisms. We hypothesized that progesterone (P4) was responsible for catabolism of uterine glycogen reserves as one of its actions to ensure reproductive success. Mink were treated with E2, P4 or vehicle (controls) for three days and uteri collected 24h (E2, P4 and vehicle) and 96h (E2) later. To evaluate E2 priming, mink were treated with E2 for three days, then P4 for an additional three days (E2→P4) and uteri collected 24h later. Percent glycogen content of uterine epithelia was greater at E2+96h (GE=5.71±0.55; LE=11.54±2.32) than E2+24h (GE=3.63±0.71; LE =2.82±1.03), and both were higher than controls (GE=0.27± 0.15; LE=0.54±0.30; P < 0.05). Treatment as E2→P4 reduced glycogen content (GE=0.61±0.16; LE=0.51±0.13), to levels not different from controls, while concomitantly increasing catabolic enzyme (glycogen phosphorylase and glucose 6 phosphatase) gene expression and amount of phosphoglycogen synthase protein (inactive) in uterine homogenates. Interestingly, E2→P4 increased glycogen synthase 1 mRNA and hexokinase mRNA (and protein). Our findings suggest to us that while E2 promotes glycogen accumulation by the mink uterus during estrus and pregnancy it is P4 that induces uterine glycogen catabolism releasing the glucose that is essential to support pre-embryonic survival and implantation.

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“…Tryptophan has long been thought to have the potential for stress reduction through its role as a substrate for serotonin and melatonin production [94]. Melatonin has been shown to have the potential to reduce ACTH secretion in various species [95][96][97].…”

Section: Potential Of Various Nutrients To Affect the Stress Responsementioning

confidence: 99%

Physiological stress in broilers: Ramifications on nutrient digestibility and responses

Virden

Kidd

2009

Journal of Applied Poultry Research

113

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Physiological stress is one of many concerns facing the modern broiler producer. Research has yet to reveal mechanisms that would allow the producer to efficiently minimize the detrimental impacts of physiological stress on broiler performance. One possible approach for improvement in this area is to elucidate the effects of different nutrient regimens on stressed broilers. Sufficient prior knowledge of the effects of stress on metabolism and nutrient digestibility, as well as effective stress induction models, is essential to any researcher interested in delineating the effects of nutrients on stressed broilers. This review examines the physiological mechanisms that activate and control stress, as well as the effects of stress on immunity, metabolism, and broiler performance. Validation procedures for stress induction models are also examined. Additionally, this review examines available research focused on amino acid digestibility in the presence of stress, digestibility assays necessary for this research, and nutrients that have been shown to have the potential for stress reduction or amelioration.

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Bilateral adrenalectomy induces early onset of summer fur growth in mink (Mustela vison)

Cited by 6 publications

References 33 publications

Methylmercury accumulation and elimination in mink (Neovison vison) hair and blood: Results of a controlled feeding experiment using stable isotope tracers

Methylmercury accumulation and elimination in mink (Neovison vison) hair and blood: Results of a controlled feeding experiment using stable isotope tracers

Estradiol stimulates glycogen synthesis whereas progesterone promotes glycogen catabolism in the uterus of the American mink (Neovison vison)

Physiological stress in broilers: Ramifications on nutrient digestibility and responses

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