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Integrating Consistent Among-Individual Differences in Behavior and Parasite Load in a Wild Population of Sleepy Lizards, Tiliqua rugosa
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| 자료유형 | 학위논문 |
|---|---|
| 서명/저자사항 | Integrating Consistent Among-Individual Differences in Behavior and Parasite Load in a Wild Population of Sleepy Lizards, Tiliqua rugosa. |
| 개인저자 | Payne, Eric Matthew . |
| 단체저자명 | University of California, Davis. Ecology. |
| 발행사항 | [S.l.]: University of California, Davis., 2019. |
| 발행사항 | Ann Arbor: ProQuest Dissertations & Theses, 2019. |
| 형태사항 | 182 p. |
| 기본자료 저록 | Dissertations Abstracts International 81-05B. Dissertation Abstract International |
| ISBN | 9781392414859 |
| 학위논문주기 | Thesis (Ph.D.)--University of California, Davis, 2019. |
| 일반주기 |
Source: Dissertations Abstracts International, Volume: 81-05, Section: B.
Advisor: Sih, Andrew. |
| 이용제한사항 | This item must not be sold to any third party vendors. |
| 요약 | Broadly, this work attempts to integrate host personality (i.e., consistent individual differences in behavior) and parasitism using a wild population of sleepy lizards (Tiliqua rugosa) and their tick parasites. To that end, Chapter 1 first studies personality in sleepy lizards over a six-year period. Specifically, we evaluated the factors that influenced lizard aggression and boldness scores, as well as determined whether these behaviors constituted personality (via quantifying their repeatability). We found a positive relationship between tick counts and lizard aggression and boldness. Both of these behaviors were also repeatable (i.e., differed consistently among individuals) for males and females through long periods, even across years. Next, given that we know that individuals of many species often differ in their parasite loads and consistently differ in their behavior, Chapter 2 uses nine years of tick count data to investigate whether sleepy lizards differed consistently in their parasitism. We found that lizards did indeed differ, such that some individuals persistently had more ticks while others had fewer. These consistent differences endured both within and across years. Lizard aggression and boldness, intriguingly, were not strongly associated with lizard average tick counts. Chapter 3 then examines more explicitly the connections between lizard personality and infection using an experimental infestation of lizards. We correlated pre-treatment behavior with the success of the infestation (attachment probability), and we assessed the effect of infestation on behavior post-treatment. Interestingly, lizard aggression and boldness interactively related to attachment probability: Increasing boldness was associated with reduced infestation success for less aggressive lizards, but greater infestation for more aggressive lizards. Upon infestation, lizards became bolder, but aggression did not change. These results therefore present the possibility of host behavior-parasite feedbacks that depend on multiple behaviors (i.e., the direction of the feedback depends on both aggression and boldness). Lastly, using piecewise structural equation modeling, Chapter 4 tests how lizard personality related to tick exposure and acquisition via intermediary pathways. For example, lizards predominantly acquire ticks through shared refuge use (which must occur with a time lag), so we considered how aggression and boldness affected refuge use, and then how refuge use affected tick counts. We found, surprisingly, that aggression and boldness did not affect tick counts either directly or through intermediary pathways. However, lizard behaviors still mattered. Tick acquisition, for instance, strongly increased with lizards' time-lagged refuge sharing, which itself increased with lizards' social network interactivity. Together, these chapters present a few key findings: 1) both behavior and parasitism can differ consistently among individuals (e.g., individuals may exhibit both persistently high aggression and parasite loads) |
| 일반주제명 | Ecology. |
| 언어 | 영어 |
| 바로가기 | 
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