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Seasonal range use by European mouflon rams in medium altitude mountains

100%

Dubois M., Quenette P. Y., Bideau E., Magnac M. P.

Acta Theriologica

1993

tom 38

nr 2

The dynamics of spatial distribution was followed in 18 radio-collared male mouflons Ovis ammon musimon (Pallas 1811) belonging to a population living in low mediterranean mountains. It was greatly modified with age and a marked interindividual variability was observed in young males. The modification of spatial behaviour appeared to be based on the process of progressive segregation of the sexes outside the rutting period. Spatial distribution by adult males seems to be more structured. However, ceHain males of at least 4 years of age were seen to be sedentary throughout the annua] cycle which suggests that the social segregation of the sexes does not necessarly involve spatial segregation. The hypothesis of neotenization in males of the genus Ovis is supported. The rut gTound is used with fidelity, being a site of particular spatial attachment, which could be related to the fact that it seems to bo the birth site. Nevertheless, with age, fréquentation of the birth site steadily become reduced to functional use related to rutting activities.

Seasonal faecal excretion, gut fill, liquid and particle marker retention in mouflon Ovis ammon musimon, and a comparison with roe deer Capreolus capreolus

80%

Behrend A., Lechner-Doll M., Streich W. J., Clauss M.

Acta Theriologica

2004

tom 49

nr 4

Five mouflon [average body mass (BM) 33 kg] and two roe deer (average BM 20 kg) with rumen cannulas were kept in large enclosures under semi-natural conditions and were used for seasonal studies on gastrointestinal tract (GIT) indigestible fill and digesta passage kinetics. As the mouflon were not fully mature, both species had similar digesta volumes in the reticulorumen (RR; mouflon 5.5 ± 1.8% of BM; roe deer 5.4 ± 1.5% of BM); however, the mouflon had lower RR liquid flow rates (15.1 ± 4.3 ml h−1 kg−0.75) than the roe deer (19.2 ± 0.2 ml h−1 kg−0.75), and particle retention in the RR accounted for 68 ± 3% of total GIT retention in the mouflon versus 55 ± 6% in the roe deer. Annual average total GIT retention times for liquids and particles were longer in the mouflon (23.4 ± 0.9 h and 37.9 ± 4.0 h) than in the roe deer (18.4 ± 1.7 h and 22.4 ± 1.9 h). Similarly, annual average RR retention times for liquids and particles were longer in the mouflon (11.9 ± 0.9 h and 25.8 ± 3.3 h) than in the roe deer (8.1 ± 1.7 h and 12.5 ± 2.3 h). The factor of selective particle retention in the RR (retention of particles/retention of liquid) was 2.10 ± 0.09 in the mouflon versus 1.54 ± 0.01 in the roe deer. These observations are in accord with differences in digesta passage characteristics postulated between browsing and grazing ruminants. Total GIT indigestible fill was lower in the mouflon than in the roe deer (10.7 ± 2.1 g kg−1 and 13.3 ± 1.0 g kg−1).

Ograniczanie wyników

2 Acta Theriologica

1 Behrend A.

1 Bideau E.

1 Clauss M.

1 Dubois M.

1 Lechner-Doll M.

1 Magnac M. P.

1 Quenette P. Y.

1 Streich W. J.

1 2004

1 1993

Wyniki wyszukiwania

Seasonal range use by European mouflon rams in medium altitude mountains

Seasonal faecal excretion, gut fill, liquid and particle marker retention in mouflon Ovis ammon musimon, and a comparison with roe deer Capreolus capreolus