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- W2894912063 abstract "Puerto Rico has experienced multiple introductions of Psittaciformes which have established self-sustaining populations, and the white-winged parakeets (Brotogeris versicolurus) has been considered the most successful invasive psittacine species in the island. In this study, we evaluated their population size, calculated growth rates and estimated the breeding proportion in two populations by performing roost counts for four consecutive years in addition to evaluating their range expansion. We also assessed their diet and breeding ecology. Population estimates parakeets during the study period showed a steady increase, with a maximum of 3,010 individuals in the San German population, and a maximum of 3,128 individuals in the San Patricio population. Both populations exhibited a geometric mean population growth rates of 25% per year. As expected, the data indicates that the populations experienced a lag-phase and prior to growing exponentially. This is supported by the island-wide sighting trends and range expansion. Moreover, we detected range expansion during our study via colonization of new areas. The population estimates and population growth rates, along with the sighting trends and their wide distribution makes the white-winged parakeet the most successful psittacine species in Puerto Rico. The factors leading to their invasion success are likely to include propagule pressure, their diet breath and their capability as primary nesters in termite mounds, which are abundant in the island. Currently, the growth rate of the white-winged parakeet does not appear to be limited by any predator, resources or nest availability, and we expect them to continue increasing and expanding their range." @default.
- W2894912063 created "2018-10-12" @default.
- W2894912063 creator A5051996846 @default.
- W2894912063 creator A5072248181 @default.
- W2894912063 date "2018-10-07" @default.
- W2894912063 modified "2023-09-26" @default.
- W2894912063 title "Breaking from the cage and taking over an island: Relentless increase and range expansion of white-winged parakeets in Puerto Rico" @default.
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