Birds of Indian Subcontinent

Host-induced Variation in Plagiorchis noblei Park, 1936 (Plagiorchiidae: Trematoda)

Publication Type:Journal Article
Year of Publication:1974
Authors:Blankespoor, HD
Journal:American Midland Naturalist
Date Published:1974
ISBN Number:00030031
Keywords:Agelaius, Agelaius phoeniceus, Chlidonias, Chlidonias niger, Corvidae, Cyanocitta, Cyanocitta cristata, Fringillidae, Gallus, Gallus gallus, Icteridae, Laridae, Meleagris, Meleagris gallopavo, Passer, Passer domesticus, Passeridae, Phasianidae, Phasianus, Phasianus colchicus, Porzana, Porzana carolina, Rallidae, Spinus, Spinus tristis, Sturnella, Sturnella neglecta, Troglodytes, Troglodytes aedon, Troglodytidae, Turdidae, Turdus, Turdus iliacus, Turdus maximus, Turdus merula, Turdus migratorius, Tyrannidae, Tyrannus, Tyrannus tyrannus, Xanthocephalus, Xanthocephalus xanthocephalus
Abstract:Eggs of Plagiorchis noblei Park, 1936, used for this study, were recovered from a single worm obtained from a naturally infected red-winged blackbird (Agelaius phoeniceus). Laboratory-reared snails (Lymnaea stagnalis and Stagnicola reflexa) and three genera of insects (Aeschna, Coenagrion and Chironomus) harbored experimental infections of this plagiorchiid. Of the 51 vertebrate species exposed to metacercariae of P. noblei, infections were established in the following avian and mammalian hosts: Gallus gallus, Meleagris gallopavo, Phasianus colchicus, Porzana carolina, Chlidonias niger, Spinus tristis, Cyanocitta cristata, Tyrannus tyrannus, Passer domesticus, Troglodytes aedon, Agelaius phoeniceus, Turdus migratorius, Iridoprocne bicolor, Sturnella neglecta, Xanthocephalus xanthocephalus, Mus musculus and Rattus norvegicus. Examination of more than 1500 laboratory-reared adults of P. noblei from these definitive hosts reveals the unreliability of body size, size of suckers, position of oral sucker, length of esophagus, size and position of gonads, extent of vitellaria and size and position of cirrus sac as taxonomic characters. Apparently the only stable taxonomic characters in adults of Plagiorchis noblei are the size-ratio of suckers and egg size.
Short Title:American Midland Naturalist
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