Dietary intake and time budget in two desert rodents: a diurnal herbivore,Psammomys obesus, and a nocturnal granivore, Meriones crassus
We studied dietary intakes and time budgets in two desert gerbillids, Psammomys obesus, a diurnal herbivore, and Meriones crassus, a nocturnal granivore. P. obesus was offered fresh leaves of Atriplex halimus while M. crassus was offered millet seeds and Atriplex halimus, mainly as a source of water...
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Published in | Mammalia (Paris) Vol. 69; no. 1; pp. 57 - 67 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
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Genthiner Strasse 13 10875 Berlin Germany
Walter de Gruyter
01.04.2005
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Abstract | We studied dietary intakes and time budgets in two desert gerbillids, Psammomys obesus, a diurnal herbivore, and Meriones crassus, a nocturnal granivore. P. obesus was offered fresh leaves of Atriplex halimus while M. crassus was offered millet seeds and Atriplex halimus, mainly as a source of water. We predicted that the (1) nocturnal rodent will feed mainly at night and the diurnal rodent mainly during the day; and (2) the herbivore consuming a relatively low energy diet will spend more time feeding than the granivore consuming a relatively high energy diet. The latter prediction was confirmed in that P. obesus spent more time feeding than M. crassus. Number of feeding sessions in M. crassus was the same as in P. obesus but each feeding session was shorter. However, the former prediction was only partially confirmed. Feeding during the dark phase was significantly longer than the light phase in the nocturnal M. crassus, as predicted; but feeding did not differ between diel phases in the diurnal P. obesus. The large amount of forage required by P. obesus necessitated consumption throughout the light and dark phases at the same rates of intake. |
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AbstractList | We studied dietary intakes and time budgets in two desert gerbillids,Psammomys obesus, a diurnal herbivore, and Meriones crassus, a nocturnalgranivore. P. obesus was offered fresh leaves of Atriplex halimus while M. crassuswas offered millet seeds and Atriplex halimus, mainly as a source of water.We predicted that the (1) nocturnal rodent will feed mainly at night and thediurnal rodent mainly during the day; and (2) the herbivore consuming arelatively low energy diet will spend more time feeding than the granivoreconsuming a relatively high energy diet. The latter prediction was confirmedin that P. obesus spent more time feeding than M. crassus. Number of feedingsessions in M. crassus was the same as in P. obesus but each feeding session wasshorter. However, the former prediction was only partially confirmed.Feeding during the dark phase was significantly longer than the light phase inthe nocturnal M. crassus, as predicted; but feeding did not differ between dielphases in the diurnal P. obesus. The large amount of forage required by P. obesusnecessitated consumption throughout the light and dark phases at thesame rates of intake. We studied dietary intakes and time budgets in two desert gerbillids, Psammomys obesus, a diurnal herbivore, and Meriones crassus, a nocturnal granivore. P. obesus was offered fresh leaves of Atriplex halimus while M. crassus was offered millet seeds and Atriplex halimus, mainly as a source of water. We predicted that the (1) nocturnal rodent will feed mainly at night and the diurnal rodent mainly during the day; and (2) the herbivore consuming a relatively low energy diet will spend more time feeding than the granivore consuming a relatively high energy diet. The latter prediction was confirmed in that P. obesus spent more time feeding than M. crassus. Number of feeding sessions in M. crassus was the same as in P. obesus but each feeding session was shorter. However, the former prediction was only partially confirmed. Feeding during the dark phase was significantly longer than the light phase in the nocturnal M. crassus, as predicted; but feeding did not differ between diel phases in the diurnal P. obesus. The large amount of forage required by P. obesus necessitated consumption throughout the light and dark phases at the same rates of intake. We studied dietary intakes and time budgets in two desert gerbillids, Psammomys obesus , a diurnal herbivore, and Meriones crassus , a nocturnal granivore. P. obesus was offered fresh leaves of Atriplex halimus while M. crassus was offered millet seeds and Atriplex halimus , mainly as a source of water. We predicted that the (1) nocturnal rodent will feed mainly at night and the diurnal rodent mainly during the day; and (2) the herbivore consuming a relatively low energy diet will spend more time feeding than the granivore consuming a relatively high energy diet. The latter prediction was confirmed in that P. obesus spent more time feeding than M. crassus . Number of feeding sessions in M. crassus was the same as in P. obesus but each feeding session was shorter. However, the former prediction was only partially confirmed. Feeding during the dark phase was significantly longer than the light phase in the nocturnal M. crassus , as predicted; but feeding did not differ between diel phases in the diurnal P. obesus . The large amount of forage required by P. obesus necessitated consumption throughout the light and dark phases at the same rates of intake. |
Author | Salek, Lyubomir Krasnov, Boris R. E. Sartor, Carmen Khokhlova, Irina S. Kuznetsov, Vladimir Degen, Allan A. Zan, Meta Kam, Michael Ghazaryan, Lusine |
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Snippet | We studied dietary intakes and time budgets in two desert gerbillids, Psammomys obesus, a diurnal herbivore, and Meriones crassus, a nocturnal granivore. P.... We studied dietary intakes and time budgets in two desert gerbillids, Psammomys obesus , a diurnal herbivore, and Meriones crassus , a nocturnal granivore. P.... We studied dietary intakes and time budgets in two desert gerbillids,Psammomys obesus, a diurnal herbivore, and Meriones crassus, a nocturnalgranivore. P.... |
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SubjectTerms | Atriplex halimus diel activity Diet Mammalia Meriones crassus Psammomys obesus time budget |
Title | Dietary intake and time budget in two desert rodents: a diurnal herbivore,Psammomys obesus, and a nocturnal granivore, Meriones crassus |
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