Article: Infestation by chigger mites in two lizard species from a dune habitat of Northern Mexico.

Abstract. -- The occurrence and levels of infestation by larvae of the chigger mite Eutrombicula alfreddugesi on the desert lizards Uma exsul and Uta stejnegeri were studied on the sand dunes of Viesca, Coahuila, Mexico. Chiggers were observed on 68.1% of U. exsul males with an average of 7.81 [+ or -] 2.7 chiggers per lizard; chiggers occurred on 54.5% of the females and averaged 4.18 [+ or -] 1.5 mites per lizard. For U. stejnegeri males, chiggers were observed on 100% of the captured lizards and each lizard averaged 61.12 [+ or -] 6.8 chiggers; 86.8% of the females were parasitized and they averaged 38.05 [+ or -] 6.8 mites per lizard. Regression analyses were used to ...

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