We estimated the median and maximum life spans of 1,459 spiny rats (Proechimys semispinosus) from mark–recapture data collected monthly from 4 island populations in central Panama over a 9-year period. We plotted frequency distributions of life spans of males and females over 5-month age intervals, proportions of males and females surviving versus age, and survivorship curves for males and females. Median life spans ranged from 6.5 to 10 months, and maximum life spans ranged from 36 to 53 months. Frequency distributions were skewed to the right, showing a greater frequency of individuals with shorter life spans. Life spans did not differ between sexes or among islands. Survival curves were linear for both males and females within 1 population and convex for both sexes within the other 3 populations. We thereby provided the 1st quantitative analysis of life spans and survival curves for any small tropical rodent.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.