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Effect Of Activity On Energy Allocation In The Northern Abalone, Haliotis Kamtschatkana (Jonas), Deborah A. Donovan, Thomas H. Carefoot
Effect Of Activity On Energy Allocation In The Northern Abalone, Haliotis Kamtschatkana (Jonas), Deborah A. Donovan, Thomas H. Carefoot
Biology Faculty and Staff Publications
The effect of activity, in the form of increased respiratory energy expenditure and secretion of mucus, on the summer and winter energy budgets of Haliotis kamtschatkana was assessed. Abalone exhibited seasonal variations in field activity with 20% of all individuals observed crawling during June to October, compared with -1 quiescent 12.0 h day-1 alert. O.7 h day-1 feeding, and 1.5 h day-1 crawling during the summer, and 15.8 h day-1 quiescent, 5.5 h day-1 alert, 2.3 h day-1 feeding, and o.4 h day-1 crawling during the winter. Videotapes of abalone made over 24-h …
The Influence Of Dispersal And Diet Breadth On Patterns Of Genetic Isolation By Distance In Phytophagous Insects, Merrill A. Peterson
The Influence Of Dispersal And Diet Breadth On Patterns Of Genetic Isolation By Distance In Phytophagous Insects, Merrill A. Peterson
Biology Faculty and Staff Publications
To determine the effects of dispersal ability and diet breadth on population-genetic structure, we reviewed the allozyme literature and estimated genetic isolation by distance (IBD) for 43 species/host races of phytophagous insects. Subsequently, we tested two opposing hypotheses regarding the influence of dispersal ability on IBD: that IBD slopes do not vary with mobility, but that intercepts increase with mobility, and, alternatively, that IBD slopes vary with dispersal ability. We found that from tens of kilometers to more than 1,000 km, IBD is weak in sedentary and highly mobile species but pronounced in moderately mobile species. We attribute the weak …
Correlates Of Average Daily Metabolism Of Field-Active Zebra-Tailed Lizards (Callisaurus Draconoides), William Karasov, Roger A. Anderson
Correlates Of Average Daily Metabolism Of Field-Active Zebra-Tailed Lizards (Callisaurus Draconoides), William Karasov, Roger A. Anderson
Biology Faculty and Staff Publications
ABSTRACT The extent of variation in reptile field metabolism, and its causal bases, are poorly understood. We studied the energetics of the insectivorous lizard Callisaurus draconoides at a site in the California Desert (Desert Center) and at a site at the southern tip of the Baja Peninsula (Cabo San Lucas; hereafter, Cabo). Reproducing Callisaurus were smaller at Cabo than at Desert Center. The allometry of metabolism with body mass can account for most differences in whole-animal metabolism. There was no significant effect of sex or source population on mass-adjusted metabolic rate in the laboratory (resting metabolism, measured by closed-system respirometry) …