Louse populations of the northern fur seal (Callorhinus ursinus).
D000818:Animals; D010872:Caniformia; D004463:Ecology; D005260:Female; D010373:Lice Infestations / Q000662:veterinary*; D008297:Male; D008003:Phthiraptera / Q000254:growth & development / Q000302:isolation & purification; D011247:Pregnancy