LIFE HISTORY DIFFERENCES ALONG THE FAST-SLOW CONTINUUM IN INTRODUCED LIZARDS IN HAWAI‘I
LIFE HISTORY DIFFERENCES ALONG THE FAST-SLOW CONTINUUM IN INTRODUCED LIZARDS IN HAWAI‘I
| dc.contributor.advisor | Wright, Amber N. | |
| dc.contributor.author | Alascio, Spencer D. | |
| dc.contributor.department | Zoology | |
| dc.date.accessioned | 2023-02-23T23:57:20Z | |
| dc.date.available | 2023-02-23T23:57:20Z | |
| dc.date.issued | 2022 | |
| dc.description.degree | M.S. | |
| dc.identifier.uri | https://hdl.handle.net/10125/104677 | |
| dc.subject | Zoology | |
| dc.subject | Anolis | |
| dc.subject | Competition | |
| dc.subject | Invasion | |
| dc.subject | Life History | |
| dc.subject | Phelsuma | |
| dc.title | LIFE HISTORY DIFFERENCES ALONG THE FAST-SLOW CONTINUUM IN INTRODUCED LIZARDS IN HAWAI‘I | |
| dc.type | Thesis | |
| dcterms.abstract | A species’ life history is the set of traits related to the timing and nature of events related to growth, reproduction, and survival. Life history strategies often occur along a ‘fast’ vs. ‘slow’ continuum, and fast life histories are frequently associated with invasion success. We documented life history traits in introduced brown anole (Anolis sagrei), green anole (Anolis carolinensis) and gold dust day gecko (Phelsuma laticauda) lizards to determine whether species differences along the fast-slow axis can help explain community changes on Oʻahu, Hawaiʻi over time. Single species populations were established in replicate 10m x10m seminatural enclosures and censused weekly for one year to track growth and survival of colonists and their offspring. We fit capture-mark-recapture models and logistic-by-weight growth models to estimate population size, survival rate, and time to sexual maturity. We documented a tradeoff between growth and survival, two key life history traits on the fast slow continuum. Brown anole females reached sexual maturity twice as fast as female green anoles and almost three times as fast as female day geckos, while male brown anoles had the lowest monthly survival probability compared to all other groups. Brown anole population estimates showed rapid population increase and high densities, and day geckos reached similar population abundance to brown anoles by the end of the study. Conversely, green anoles decreased in population size and abundance remained lower than the other species throughout the study. All three species had comparable total biomass estimates over time despite variation in abundance, suggesting an upper limit on lizard biomass set by resource availability in enclosures. The high abundance of brown anoles and day geckos, coupled with the low population abundance of green anoles, despite being on relatively opposite ends of the fast slow continuum, mirrors observed population dynamics on O‘ahu where green anoles have become rarer following the introduction and spread of the other two species. These results suggest that relatively extreme life history strategies may be favored in this environment. | |
| dcterms.extent | 33 pages | |
| dcterms.language | en | |
| dcterms.publisher | University of Hawai'i at Manoa | |
| dcterms.rights | All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner. | |
| dcterms.type | Text | |
| local.identifier.alturi | http://dissertations.umi.com/hawii:11621 |
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