Premium
Population genetic structure of the common warthog ( Phacochoerus africanus ) in Uganda: evidence for a strong philopatry among warthogs and social structure breakdown in a disturbed population
Author(s) -
Muwanika Vincent B.,
Nyakaana Silvester,
Siegismund Hans R.,
Arctander Peter
Publication year - 2007
Publication title -
african journal of ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.499
H-Index - 54
eISSN - 1365-2028
pISSN - 0141-6707
DOI - 10.1111/j.1365-2028.2006.00671.x
Subject(s) - biology , population , philopatry , gene flow , genetic structure , effective population size , ecology , population genetics , microsatellite , biological dispersal , zoology , genetic variation , genetics , allele , demography , sociology , gene
Abstract Fine‐scale genetic structure of large mammals is rarely analysed. Yet it is potentially important in estimating gene flow between the now fragmented wildlife habitats and in predicting re‐colonization following local extinction events. In this study, we examined the extent to which warthog populations from five localities in Uganda are genetically structured using both mitochondrial control region sequence and microsatellite allele length variation. Four of the localities (Queen Elizabeth, Murchison Falls, Lake Mburo and Kidepo Valley) are national parks with relatively good wildlife protection practices and the other (Luwero), not a protected area, is characterized by a great deal of hunting. In the total sample, significant genetic differentiation was observed at both the mtDNA locus ( F ST = 0.68; P < 0.001) and the microsatellite loci ( F ST = 0.14; P < 0.001). Despite the relatively short geographical distances between populations, significant genetic differentiation was observed in all pair‐wise population comparisons at the two marker sets (mtDNA F ST = 0.21–0.79, P < 0.001; microsatellite F ST = 0.074–0.191, P < 0.001). Significant heterozygote deficiency was observed at most loci within protected areas while no significant deviation from Hardy–Weinberg expectation was observed in the unprotected Luwero population. We explain these results in terms of: (i) a strong philopatry among warthogs, (ii) a Wahlund effect resulting from the sampling regime and (iii) break down of social structure in the disturbed Luwero population.