2001
DOI: 10.1002/1097-010x(20010201)289:2<109::aid-jez4>3.0.co;2-i
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Effects of seasonality and fasting on the plasma leptin and thyroxin levels of the raccoon dog (Nyctereutes procyonoides) and the blue fox (Alopex lagopus)

Abstract: Plasma leptin and thyroxin concentrations of eleven raccoon dogs and eleven blue foxes were monitored for 6 months. Half of the animals were placed on a 3‐week fast in November. Leptin levels were low in summer, but in October they rose significantly. In November, leptin concentrations decreased rapidly within a week although the body mass of the animals remained stable. There were no significant differences between experimental groups for raccoon dogs, but in blue foxes the fasting group had lower leptin leve… Show more

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Cited by 36 publications
(38 citation statements)
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“…Another major drawback is the fact that we did not study acute effects of food withdrawal and can therefore not exclude the possibility that fed animals could have had higher leptin levels during the first days of food deprivation. However, it has previously been observed in captive blue foxes that the plasma leptin levels remain almost unaffected during a 3-week total fast, thus supporting the results of this study (Nieminen et al 2001).…”
Section: Discussionsupporting
confidence: 92%
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“…Another major drawback is the fact that we did not study acute effects of food withdrawal and can therefore not exclude the possibility that fed animals could have had higher leptin levels during the first days of food deprivation. However, it has previously been observed in captive blue foxes that the plasma leptin levels remain almost unaffected during a 3-week total fast, thus supporting the results of this study (Nieminen et al 2001).…”
Section: Discussionsupporting
confidence: 92%
“…5 Leptin-ghrelin ratios during food deprivation and refeeding in May (unfilled symbols) and November (filled symbols), in arctic foxes on Svalbard presented as the mean±SD increase in circulating leptin concentrations during the recovery period from food deprivation (Nieminen et al 2002) as the energy reserves (adipose tissue) are replenished. The results of the present study further enforce the hypothesis of leptin not always being an indicator of body adiposity in carnivores (Nieminen et al 2001(Nieminen et al , 2002Arnould et al 2002).…”
Section: Discussionsupporting
confidence: 89%
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