Topic
Achatinella fuscobasis
About: Achatinella fuscobasis is a research topic. Over the lifetime, 1 publications have been published within this topic receiving 3 citations. The topic is also known as: Oahu tree snail.
Papers
TL;DR: The drastic population decline appears to have been due to stochastic demographic dynamics characteristic of small populations, with bottleneck effects that occurred before the founding of the ex situ population acting in synergy with factors such as disease.
Abstract: Hawaiian tree snails in subfamily Achatinellinae have experienced drastic population declines and range reductions as a result of habitat destruction, overcollection, and introduced predators. In 1991, 11 individuals from one of the last remaining populations of Achatinella fuscobasis, a federally listed species, were brought to the University of Hawai‘i's tree-snail captive-rearing facility. After increasing in population size to 441 snails in 2005, the population subsequently declined to only 120 snails by 2014, a 73% reduction. In this study, we assessed demographic and genetic changes that occurred in the captive-bred population of A. fuscobasis. Demographic data were compared to genetic data collected from 11 microsatellite markers for the F1 to F3 generations to investigate the role bottleneck effects such as loss of genetic diversity and inbreeding may have had on the population decline. Demographic measures such as juvenile survival and survival to maturity remained constant for the F1 a...
5 citations
Performance Metrics
| Year | Papers |
|---|---|
| 2016 | 1 |