Abstract
Abstract I used six nuclear microsatellites to assess rates of intraspecific brood parasitism and extra- pair paternity in relationship to conspecific density in 218 offspring from 44 broods of Loggerhead Shrikes (Lanius ludovicianus). I also estimated statistical power associated with these markers for each parentage test and suggest a method for adjusting power estimates when individuals are incompletely genotyped. No offspring were the result of intraspecific brood parasitism. Eight offspring from five families (4% of all offspring; 14% of families) were sired by extra-pair fertilization. Average exclusionary power was 0.94 when adjusted to account for incomplete genotyping. Assuming a 1% genotyping error rate, this power drops to 0.91. This is the first genetic assessment of parentage in a wild population of Loggerhead Shrikes. Parentesco en una Poblacion de Oklahoma de Lanius ludovicianus Evaluado Usando Microsatelites Nucleares Resumen. Utilice seis microsatelites nucleares para evaluar las tasas de...
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