Wyniki wyszukiwania

1

Advantages of trees and shrubs contribute to fen pasture landscapes

100%

Schalitz G., Behrend A., Fischer A.

Folia Universitatis Agriculturae Stetinensis. Agricultura

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1999

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tom 75

287-292

2

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

100%

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

Acta Theriologica

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2004

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tom 49

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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).

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Particle retention in the forestomach of a browsing ruminant, the roe deer Capreolus capreolus

76%

Clauss M., Lechner-Doll M., Behrend A., Lason K., Lang D., Streich W. J.

Acta Theriologica

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2001

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tom 46

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nr 1

A combination of a flotation/sedimentation experiment and sieve analysis for the reticulorumen (RR) contents of roe deer Capreolus capreolus Linnaeus, 1758, a browsing ruminant, showed that there was no correlation between particle size and particle density. Large particles were present in both the sedimented and the buoyant fraction, which is in accord with the reported absence of stratification of RR contents in browsing ruminants. Comparative sieve analysis of roe deer RR and caecal/rectal material demonstrated that there must be some selective particle retention in the browsing ruminant as well, as a certain fraction of large particles in RR contents does not occur in the caecal/rectal material. These results lead to the explanatory dilemma that, while selective particle retention is observed, it cannot be due to the mechanisms known to work in grazing ruminants.

Ograniczanie wyników

2 Acta Theriologica

1 Folia Universitatis Agriculturae Stetinensis. Agricultura

3 Behrend A.

2 Clauss M.

2 Lechner-Doll M.

2 Streich W. J.

1 Fischer A.

1 Lang D.

1 Lason K.

1 Schalitz G.

1 2004

1 2001

1 1999

Advantages of trees and shrubs contribute to fen pasture landscapes

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

Particle retention in the forestomach of a browsing ruminant, the roe deer Capreolus capreolus