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La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

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Titre :	Successful semen collection from Capercaillie (Tetrao urogallus L.) kept in an aviary system
Auteurs :	Ewa Lukaszewicz, Auteur ; Artur Kowalczyk, Auteur ; Zenon Rzonca, Auteur
Type de document :	Article
Dans :	Ornis Fennica (88(2) 2011)
Article en page(s) :	110-115
Langues:	Anglais
Résumé :	We tested the feasibility of obtaining ejaculates from Capercaillie (Tetrao urogallus L.) kept under aviary conditions. A total of nine individuals in their first (n = 4), fifth (n = 3) or sixth (n = 2) reproductive season were raised in floor pens in the absence (1-year old males) or presence (5- and 6-years old males) of contemporary females and attempted to collect semen using the massage technique. Successful ejaculations were more frequently obtained in older (90%) than in young males (50%). The following semen characteristics of ejaculates were observed for young vs. old males: mean volume 25 mu l vs. 41 mu l; sperm concentration 470 x 10(6)ml(-1) vs. 1,133 x 10(6)ml(-1); sperm viability (eosin-nigrosin test) 92.7% vs. 94.6%; morphologically normal sperm 66.5% vs. 73.2%. Semen quality, expressed as the Sperm Quality Factor, reached 10.5 in young and 33.8 in older males. These observations confirm the feasibility of performing successful semen collection in captive Capercaillie, a pre-requisite for the development of artificial insemination for the purpose of gene banking and to optimize the reproductive performance in this endangered species. Interestingly, one-year-old Capercaillie can produce semen, although the quantity and quality are lower than in older males.

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