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- Creator:
- Greenley, Ashley P
- Description:
- by Ashley P. Greenley, Thesis (M.S.) -- San Jose State University, 2009, and "A thesis presented to the faculty of Moss Landing Marine Laboratories."
- Resource Type:
- Masters Thesis
- Campus Tesim:
- Moss Landing
- Creator:
- Spear, Laurence Berriman
- Description:
- "A thesis presented to the faculty of Moss Landing Marine Laboratories.", Thesis (M.S.) -- San Jose State University, 1989., and by Laurence Berriman Spear
- Resource Type:
- Masters Thesis
- Campus Tesim:
- Moss Landing
- Creator:
- Torok, Michael L.
- Description:
- "A thesis presented to the faculty of Moss Landing Marine Laboratories.", by Michael L. Torok, and Thesis (M.S.) -- California State University, Stanislaus, 1994. Harbor seal
- Resource Type:
- Masters Thesis
- Campus Tesim:
- Moss Landing
- Creator:
- Surber, Lisa L.
- Description:
- Research on animal movement patterns and factors that influence these patterns is vital to conservation of endangered species. The California Red-legged frog (Rana draytonii) is a threatened species native to California. Their rapid decline has been largely attributed to habitat loss and introduction of invasive species, including the American Bullfrog (Lithobates catesbeianus). The aim of this research was to compare the nocturnal habitat use and seasonal movement patterns of R. draytonii and L. catesbeianus. I conducted a radio telemetry study in Sonoma County, California and mapped the locations of 13 L. catesbeianus and 51 R. draytonii from May 2017 to June 2018. Using a mixed model, I evaluated the effects of species, sex, size and rainfall on frog movement rate and compared habitat use relative to a water source. Within this model species, size and sex were found to have significant effects on movement rate. Rainfall was not found to have a significant effect on movement rate for either species. When comparing nocturnal habitat movement, I found that in the summer months species occupy different places relative to water sources in a creek environment; R. draytonii position themselves higher and further away from the nearest open water than L. catesbeianus. My work suggests that there are significant differences between the seasonal movement patterns and nocturnal habitat use of native R. draytonii and invasive L. catesbeianus. These differences may be helpful to conservation practices facilitating the survival of threatened R. draytonii.
- Resource Type:
- Masters Thesis
- Campus Tesim:
- Sonoma
- Department:
- Biology
- Creator:
- Kay, David William
- Description:
- Adult Hyla cadaverina are found in the open in abundance along lower Trail Creek during spring and fall when temperatures are moderate. During winter, the animals seek shelter in crevices above the high water mark, thereby escaping flash floods. In summer, they inhabit cool, moist crevices near the stream which provide protection from the summer heat. As in many other anurans, individual H. cadaverina tend to occupy limited overlapping home ranges, usually less than 5 m long, aggregated near large pools created by stream boulders. A small percentage emigrate relatively long distances up to 250 m to new pools, usually also inhabited by several other H. cadaverina. Such movements may serve to maintain genetic variation in the population. When tested in the field for y-axis orientation, individual H. cadaverina clearly showed a preference for a familiar shoreline. (See more in text.)
- Resource Type:
- Thesis
- Campus Tesim:
- Northridge
- Department:
- Biology
- Creator:
- Hill, Brian Jerome
- Description:
- Home range, homing and orientation in a population of Uta Stansburiana were studied over a period of thirteen months. I found the home range sizes (males 36.8 m2, females 30.7 m2 and juveniles 16.4 m2} to be smaller than those reported in previous studies, with no significant difference between adult male and female home range size. There was considerable overlap among the home ranges of both adult males and females. About 25 % of the adults of both sexes which were displaced 50 to 60 m homed. Juveniles were not observed to home. Anosmic adult lizards, those with the parietal eye covered, and normal animals oriented and homed equally well. Blind adults did not orient or home. Uta released in an open arena in the field showed significant orientation to toward their original capture site if displaced less than 40 m from their home range area were visible. Lizards farther than 40 m from their home area, or which could not see landmarks within their home area from the arena center, failed to show significant orientational ability. Lizards tested in enclosed arenas exhibited behavior related to thermoregulation rather than orientation toward home.
- Resource Type:
- Thesis
- Campus Tesim:
- Northridge
- Department:
- Biology