Scanty information is available for many species of chewing lice of marine birds. Through this wo... more Scanty information is available for many species of chewing lice of marine birds. Through this work we investigated one of most characteristic marine bird for chewing lice. Seven individuals of crab plovers Dromas ardeola Paykull, 1805 were trapped using standard mist nets on Humr Island in Farasan Archipelago, Saudi Arabia. Two species of chewing lice were found to infest these birds: Actornithophilus ardeolae Timmermann, 1954 of suborder Amblycera and Quadraceps brunneus (Nitzsch in Giebel, 1866) of suborder Ischnocera. Diagnostic characters, data of specimens examined, high definition photos and host distribution map are provided through this paper.
... University of Groningen, PO Box 14, 9750 AA Haren, The Netherlands, e-mail: tieleman@biol. ru... more ... University of Groningen, PO Box 14, 9750 AA Haren, The Netherlands, e-mail: tieleman@biol. rug.nl MOHAMMED SHOBRAK National ... spiny-tailed lizard, Uromastyx aegyp-ticus, common throughout the Arabian Peninsula, feeds primarily on leaves and seeds (Al Sadoon et al. ...
... and this method was used exclusively from 1993 when University of Otago, PO Box 56, Dunedin, ... more ... and this method was used exclusively from 1993 when University of Otago, PO Box 56, Dunedin, New Zealand. E-mail philip.seddon@stonebow.otago.ac.nz ... and Maerua crassifolia (Fisher et al., the aim of ensuring the long-term persistence of this key population Treydte et al. ...
Journal of Comparative Physiology B-biochemical Systemic and Environmental Physiology, 2010
Heterothermy, a variability in body temperature beyond the limits of homeothermy, has been advanc... more Heterothermy, a variability in body temperature beyond the limits of homeothermy, has been advanced as a key adaptation of Arabian oryx (Oryx leucoryx) to their arid-zone life. We measured body temperature using implanted data loggers, for a 1-year period, in five oryx free-living in the deserts of Saudi Arabia. As predicted for adaptive heterothermy, during hot months compared to cooler months, not only were maximum daily body temperatures higher (41.1 ± 0.3 vs. 39.7 ± 0.1°C, P = 0.0002) but minimum daily body temperatures also were lower (36.1 ± 0.3 vs. 36.8 ± 0.2°C, P = 0.04), resulting in a larger daily amplitude of the body temperature rhythm (5.0 ± 0.5 vs. 2.9 ± 0.2°C, P = 0.0007), while mean daily body temperature rose by only 0.4°C. The maximum daily amplitude of the body temperature rhythm reached 7.7°C for two of our oryx during the hot-dry period, the largest amplitude ever recorded for a large mammal. Body temperature variability was influenced not only by ambient temperature but also water availability, with oryx displaying larger daily amplitudes of the body temperature rhythm during warm-dry months compared to warm-wet months (3.6 ± 0.6 vs. 2.3 ± 0.3°C, P = 0.005), even though ambient temperatures were the same. Free-living Arabian oryx therefore employ heterothermy greater than that recorded in any other large mammal, but water limitation, rather than high ambient temperature, seems to be the primary driver of this heterothermy.
Scanty information is available for many species of chewing lice of marine birds. Through this wo... more Scanty information is available for many species of chewing lice of marine birds. Through this work we investigated one of most characteristic marine bird for chewing lice. Seven individuals of crab plovers Dromas ardeola Paykull, 1805 were trapped using standard mist nets on Humr Island in Farasan Archipelago, Saudi Arabia. Two species of chewing lice were found to infest these birds: Actornithophilus ardeolae Timmermann, 1954 of suborder Amblycera and Quadraceps brunneus (Nitzsch in Giebel, 1866) of suborder Ischnocera. Diagnostic characters, data of specimens examined, high definition photos and host distribution map are provided through this paper.
... University of Groningen, PO Box 14, 9750 AA Haren, The Netherlands, e-mail: tieleman@biol. ru... more ... University of Groningen, PO Box 14, 9750 AA Haren, The Netherlands, e-mail: tieleman@biol. rug.nl MOHAMMED SHOBRAK National ... spiny-tailed lizard, Uromastyx aegyp-ticus, common throughout the Arabian Peninsula, feeds primarily on leaves and seeds (Al Sadoon et al. ...
... and this method was used exclusively from 1993 when University of Otago, PO Box 56, Dunedin, ... more ... and this method was used exclusively from 1993 when University of Otago, PO Box 56, Dunedin, New Zealand. E-mail philip.seddon@stonebow.otago.ac.nz ... and Maerua crassifolia (Fisher et al., the aim of ensuring the long-term persistence of this key population Treydte et al. ...
Journal of Comparative Physiology B-biochemical Systemic and Environmental Physiology, 2010
Heterothermy, a variability in body temperature beyond the limits of homeothermy, has been advanc... more Heterothermy, a variability in body temperature beyond the limits of homeothermy, has been advanced as a key adaptation of Arabian oryx (Oryx leucoryx) to their arid-zone life. We measured body temperature using implanted data loggers, for a 1-year period, in five oryx free-living in the deserts of Saudi Arabia. As predicted for adaptive heterothermy, during hot months compared to cooler months, not only were maximum daily body temperatures higher (41.1 ± 0.3 vs. 39.7 ± 0.1°C, P = 0.0002) but minimum daily body temperatures also were lower (36.1 ± 0.3 vs. 36.8 ± 0.2°C, P = 0.04), resulting in a larger daily amplitude of the body temperature rhythm (5.0 ± 0.5 vs. 2.9 ± 0.2°C, P = 0.0007), while mean daily body temperature rose by only 0.4°C. The maximum daily amplitude of the body temperature rhythm reached 7.7°C for two of our oryx during the hot-dry period, the largest amplitude ever recorded for a large mammal. Body temperature variability was influenced not only by ambient temperature but also water availability, with oryx displaying larger daily amplitudes of the body temperature rhythm during warm-dry months compared to warm-wet months (3.6 ± 0.6 vs. 2.3 ± 0.3°C, P = 0.005), even though ambient temperatures were the same. Free-living Arabian oryx therefore employ heterothermy greater than that recorded in any other large mammal, but water limitation, rather than high ambient temperature, seems to be the primary driver of this heterothermy.
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