Karell, P A possible link between parasite defence and residual reproduction. [electronic resource] - Journal of evolutionary biology Nov 2007 - 2248-52 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 1010-061X Standard No.: 10.1111/j.1420-9101.2007.01423.x doi Subjects--Topical Terms: Animal Nutritional Physiological PhenomenaAnimalsEukaryota--isolation & purificationFemaleNesting BehaviorProtozoan Infections, Animal--parasitologyReproductionStrigiformes--genetics