Seasonal changes in plasma testosterone, thyroxine, and cortisol levels in wild rabbits ( Oryctolagus cuniculus algirus ) of Zembra island
Identifieur interne : 001668 ( Main/Exploration ); précédent : 001667; suivant : 001669Seasonal changes in plasma testosterone, thyroxine, and cortisol levels in wild rabbits ( Oryctolagus cuniculus algirus ) of Zembra island
Auteurs : Moncef Ben Saad [Tunisie] ; Jean-Dominique Bayle [France]Source :
- General and Comparative Endocrinology [ 0016-6480 ] ; 1985.
Abstract
Annual variations in testosterone, thyroxine, and cortisol concentrations were recorded in plasma samples obtained monthly from male wild rabbits living in their natural biotope. For comparison, a group of animals was held in semicaptivity close to Tunis. Zembra is an uninhabited, hardly accessible island, north of the bay of Tunis and is a part of a large, protected zone of natural reserve. Warrens of Zembra appear to subsist from a very remote past, without any contact with other strains. In both natural and captive environments, testosterone levels peak sharply in October, decline in November–December, and are low from January to September. Thyroxine titers also peak in October but a second peak occurs in spring, the magnitude of which is markedly higher in natural than in captive conditions. As to cortisol, netting in Zembra results in stress-induced high values but semicaptive specimens exhibit a clear-cut annual rhythm peaking in January.
Url:
DOI: 10.1016/0016-6480(85)90218-7
Affiliations:
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For comparison, a group of animals was held in semicaptivity close to Tunis. Zembra is an uninhabited, hardly accessible island, north of the bay of Tunis and is a part of a large, protected zone of natural reserve. Warrens of Zembra appear to subsist from a very remote past, without any contact with other strains. In both natural and captive environments, testosterone levels peak sharply in October, decline in November–December, and are low from January to September. Thyroxine titers also peak in October but a second peak occurs in spring, the magnitude of which is markedly higher in natural than in captive conditions. As to cortisol, netting in Zembra results in stress-induced high values but semicaptive specimens exhibit a clear-cut annual rhythm peaking in January.</div></front></TEI><affiliations><list><country><li>France</li><li>Tunisie</li></country><region><li>Languedoc-Roussillon</li><li>Occitanie (région administrative)</li></region></list><tree><country name="Tunisie"><noRegion><name sortKey="Saad, Moncef Ben" sort="Saad, Moncef Ben" uniqKey="Saad M" first="Moncef Ben" last="Saad">Moncef Ben Saad</name></noRegion></country><country name="France"><region name="Occitanie (région administrative)"><name sortKey="Bayle, Jean Dominique" sort="Bayle, Jean Dominique" uniqKey="Bayle J" first="Jean-Dominique" last="Bayle">Jean-Dominique Bayle</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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