RT Journal Article
T1 Prediction of the minimum effective size of a population viable in the long term
A1 Pérez Pereira, Noelia
A1 Wang, Jinliang
A1 Quesada Rodríguez, Humberto Carlos
A1 Caballero Rúa, Armando
K1 2409.03 Genética de Poblaciones
K1 2407.02 Citogenética
AB The establishment of the minimum size for a viable population (MVP) has been used as a guidance in conservation practice to determine the extinction risks of populations and species. A consensus MVP rule of 50/500 individuals has been attained, according to which a minimum effective population size of Ne = 50 is needed to avoid extinction due to inbreeding depression in the short term, and of Ne = 500 to survive in the long term. However, the large inbreeding loads (B) usually found in nature, as well as the consideration of selection affecting genetic diversity, have led to a suggestion that those numbers should be doubled (100/1000). Purging of deleterious mutations can also be a main factor affecting the suggested rules. In a previous simulation study, the reduction of B by the action of purging pointed towards an MVP intermediate between the two rules for short term survival. Here, we focused on the consequences of purging in the establishment of MVPs for long term survival. We performed computer simulations of populations under the action of purging, drift, new mutation, and environmental effects on fitness to investigate the extinction times and the loss of genetic diversity for a range of effective population sizes. Our results indicate that purging can reduce the MVP needed for a population to persist in the long term, with estimates close to Ne = 500 for species with moderately large reproductive rates. However, MVP values appear to be of at least Ne = 1000 when the species´ reproductive rates are low.
PB Biodiversity and Conservation
SN 09603115
YR 2022
FD 2022-09
LK http://hdl.handle.net/11093/3737
UL http://hdl.handle.net/11093/3737
LA eng
NO Biodiversity and Conservation, 31: 2763-2780 (2022)
NO Financiado para publicación en acceso aberto: Universidade de Vigo/CISUG
NO Agencia Estatal de Investigación | Ref. PID2020-114426GB-C21
DS Investigo
RD 25-abr-2025