Egg production of White Leghorn hens infested with the northern fowl mite, Ornithonyssus sylviarum (Canestrini and Fanzago), was as much as 15% lower than egg production of control hens. However, when these hens were artificially inseminated with semen from mite infested roosters, fertility nor hatchability was affected by the mite infestation.
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Joyce A. Devaney (1978) studied this question.
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