Some Aspects of the Hibernation in the European Hedgehog Erinaceus Europaeus L

Smit-Vis, J.H.

doi:10.1163/036551662x00060

Cited by 77 publications

(12 citation statements)

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“…1, Table 5 and 6) confirms previous findings (e.g. Smit-Vis, 1962;Kristoffersson and Soivio, 1964a;Clausen, 1965;Johansson and Senturia, 1972 ;T/ihti, 1978) which revealed that parameters measured during hibernation show wide individual variation. That the more consistent torpor in the two males (no 1 and 4) in all likelihood was due to size rather than to sex is supported by recent studies (Walhovd, 1975(Walhovd, , 1977(Walhovd, , 1978.…”

Section: Discussionsupporting

confidence: 89%

“…The European hedgehog has similarly been reported to show spontaneous arousals at intervals when hibernating at constant ambient temperature in the laboratory Soivio, 1964a, 1967); or at variable environmental conditions (Proctor, 1949;Smit-Vis, 1962;Walhovd, 1978). The present study (Fig.…”

Section: Discussionmentioning

confidence: 98%

“…Proctor, 1949;Clausen, 1962;Smit-Vis, 1962;Walhovd, 1978). More frequently however the experimental animals were not given access to food and water (e.g.…”

Section: Discussionmentioning

confidence: 99%

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Partial arousals from hibernation in hedgehogs in outdoor hibernacula

Walhovd

1979

Oecologia

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Thermal properties of hibernacula and sequences of arousals have been studied in four adult hedgehogs for seven months starting in October. Departures and entries to the nesting chamber were continuously monitored together with ambient temperature and the temperature in the hibernacula.During the two first months of the experimental period nest departures were intermittently recorded, predominantly in the two females which also occasionally foraged. The longest periods spent continuously in the hibernaculum ranged from 129 to 178 days. The natural hibernation season for Danish hedgehogs was found to comprise the six months from October onwards when there is little shelter where hedgehogs normally roam.Ambient temperatures recorded were -11 to +13° C being subzero for half the total time measured. The nest temperatures generally were higher, and above 0° C during 78-99% of total time, most commonly ranging from 0° to 4° C and thus reflecting deep hibernation.Between December and May spontaneous increases in nest temperatures amounting to 7-26° C (average 18° C) and bringing these temperatures to 10-29.5° C were recorded in 58 cases. Fiftyfour arousals did not involve departure from the hibernaculum (partial arousals). In the remaining cases (full arousals) the preceding rewarming lasted 4 1/2-6 1/2 h and nest departures amounted to 10,2 and 5 min in one female hedgehog and 90 min in another.The hedgehogs showed 12-18 arousals, the mean duration of which was 34-44 h. The high energy expenditure associated with arousals however, was found to last on average 21 h during each arousal. It is hypothesized that the body temperature during arousals chiefly was below 35-37° C.The time between arousals was 3-15 days. Periods in hibernation averaged 7-8 days in the females and 9-10 days in the heavier males, being generally longest in January-February. Neither arousals nor re-entries into deep hibernation occurred at any particular time of the day. It is suggested that for undisturbed hedgehogs arousals are induced and controlled by endogenous factors. In conclusion it is stressed that future studies on hibernation should recognize the importance of individual variability in the response pattern and focus interest on the endogenous factors which govern this important process.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 98%

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Partial arousals from hibernation in hedgehogs in outdoor hibernacula

Walhovd

1979

Oecologia

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“…This cell-type corresponds to a part of the 'acidophil' cells previously men tioned [Hanstrôm, 1946;Bloom, 1960;Smit-Vis, 1962], In many aspects, somato tropic cells of the hedgehog have ultrastruc tural characters comparable to those of other mammalian species [Girod, 1982b]. However, the hedgehog proved to be appa rently unique among mammals hitherto studied, in that while in all studied species the Golgi area is the specific zone of appear-ance of newly synthetized granules, the ultrastructural features of formation of these granules in the hedgehog is of an unique type.…”

Section: Discussionmentioning

confidence: 99%

“…Some authors have presented microscopical analy sis of the neurohypophysis from a his tochemical point of view [Azzali, 1954;Suomalainen and Nyholm, 1956;Bloom, 1960;Suomalainen, 1960;Holmes, 1961;Kiernan, 1964] or with respect to its ultra structure Kiernan, 1963, 1964;Campbell and Holmes, 1966], Regarding the adenohypophysis, the descriptions were very succinct, mentioning the existence of chromophobe cell-type and various chromophil cell-types, namely acidophil and basophil [Hanström, 1946;Aliara, 1958Aliara, , 1959Bloom, 1960, Smit-Vis, 1962Camp bell and Smith, 1966]. To our knowledge, no research has been published using the mod ern techniques necessary to investigate the cytology of the pars distalis.…”

Section: Introductionmentioning

confidence: 99%

Cell Types of the Pars distalis of the Hedgehog (<i>Erinaceus europaeus</i> L.) Adenohypophysis: Cytological, Immunocytochemical and Ultrastructural Studies

Girod¹,

Lhéritier²,

Trouillas³

et al. 1982

Cells Tissues Organs

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Staining and histochemical methods, immunofluorescence, and electron microscopy were used to individualize the somatotropic cells in the adenohypophyseal pars distalis of the non-hibernating hedgehog. One cell-type was differentiated; their characteristics at the light and electron microscopic levels were presented. Immunofluorescence has confirmed the functional significance of this cell-type and the validity of the denomination ‘somatotropic cells’.

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Introduction—a perspective

Wertheimer

1965

Comprehensive Physiology

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Some Aspects of the Hibernation in the European Hedgehog Erinaceus Europaeus L

Cited by 77 publications

References 0 publications

Partial arousals from hibernation in hedgehogs in outdoor hibernacula

Partial arousals from hibernation in hedgehogs in outdoor hibernacula

Cell Types of the Pars distalis of the Hedgehog (<i>Erinaceus europaeus</i> L.) Adenohypophysis: Cytological, Immunocytochemical and Ultrastructural Studies

Introduction—a perspective

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