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Full-Text Articles in Life Sciences
Hibernation Is Recorded In Lower Incisors Of Recent And Fossil Ground Ssquirrels (Spermophilus), Tom Goodwin, Gail R. Michener, Daniel Gonzalez, Caroline E. Rinaldi
Hibernation Is Recorded In Lower Incisors Of Recent And Fossil Ground Ssquirrels (Spermophilus), Tom Goodwin, Gail R. Michener, Daniel Gonzalez, Caroline E. Rinaldi
Faculty Publications
Incremental dentin and associated enamel, features visible on the surface of lower incisors, were characterized for 3 species of ground squirrels (Spermophilus): Pleistocene and Recent S. elegans, Recent S. richardsonii, and Recent S. parryii. A hibernation mark was evident in incisor dentin and enamel, most characteristically as a sleeve of enamel terminating basally adjacent to medially depressed dentin with indistinct and often very fine increments. This mark was absent in juveniles but present in older animals of both sexes for at least 6 weeks after hibernation, eventually being lost through growth and wear of the incisor. Temporal association with hibernation …
Predicting Numbers Of Hauled-Out Harbour Seals: A Mathematical Model, James L. Hayward, Shandelle M. Henson, Clara J. Logan, Catherine R. Parris, Matthew W. Meyer, Brian Dennis
Predicting Numbers Of Hauled-Out Harbour Seals: A Mathematical Model, James L. Hayward, Shandelle M. Henson, Clara J. Logan, Catherine R. Parris, Matthew W. Meyer, Brian Dennis
Faculty Publications
1. It was once assumed that commercially important fish make up significant portions of seal diets. As a consequence, prior to the 1970s many seal populations were dramatically reduced by rampant slaughtering. Today, seals and other marine mammals are valued components of marine ecosystems and their numbers are carefully managed. To facilitate management, government statutes mandate the systematic monitoring of seal populations. Population estimates are based on counts of hauled-out seals obtained by aerial survey and radio and satellite telemetry; hence, considerable effort has been devoted to finding optimal times for such counts. We have developed a predictive mathematical model …
Ponazuril Inhibits The Development Of Eimeria Vermiformis In Experimentally Infected Outbred Swiss Mice, S. A. Billeter, J. A. Spencer, Bill Chobotar, B. L. Blagburn
Ponazuril Inhibits The Development Of Eimeria Vermiformis In Experimentally Infected Outbred Swiss Mice, S. A. Billeter, J. A. Spencer, Bill Chobotar, B. L. Blagburn
Faculty Publications
We evaluated a 15% paste formulation of ponazuril in outbred Swiss mice that were experimentally infected with Eimeria vermiformis. Thirty, 8-week-old female mice (approximately 20 g) were placed in one group of 10 mice and one group of 20 mice. Mice in both groups were gavaged with approximately 5,000 sporulated oocysts of E. vermiformis on day 0. Mice in group 2 (n=10) were treated orally on days 3 and 4 with ponazuril (suspended in 30% propylene glycol) at the rate of 20 mg/kg. Mice in group 1 (n=20) were gavaged with a similar volume of 30% propylene glycol. Rates of …