Ornithology Research Today is a free monthly online journal that collates and summarizes the latest research about Ornithology, including details on study of birds, classification, endangered species. | ||||||
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Linking larvae and adults of Apharyngostrigea cornu, Hysteromorpha triloba and Alaria mustelae (Diplostomoidea: Digenea) using molecular data.Locke S, McLaughlin JD, Lapierre AR, Johnson PT, Marcogliese DJ a Environment Canada, Post doctoral fellow, Environment Canada. Abstract Because the taxonomy of trematodes is based on adults, the larval stages of most digeneans cannot be identified to species based on morphology alone. Molecular data provide a means of linking larval stages to known adults. We obtained sequences from the barcode region of cytochrome oxidase I (CO1) from adult and larval parasites of fish, frogs, birds, and mammals across North America. Sequences from adult Apharyngostrigea cornu, Hysteromorpha triloba, and Alaria mustelae (Diplostomoidea: Digenea) from definitive hosts matched those of meta- and mesocercariae from fish and frogs. This provided new information on the distributions of all 3 parasite species. Metacercariae of A. cornu, which have not been previously reported in North American hosts, were found in Notropis hudsonius, Pimephales notatus, and Catostomus commersonii in the St. Lawrence River. Metacercariae of H. triloba are reported in Canadian waters and in N. hudsonius for the first time. Alaria mustelae is reported for the first time in frogs from Quebec, and an additional species of Alaria was detected in California. Sequences also revealed that an unidentified species of Fibricola occurs in both Quebec and California. Sequences of ITS rDNA obtained from a subset of specimens support the same species boundaries indicated by CO1 divergence. Published 22 April 2011 in J Parasitol. Articles on Ornithology published 22 April 2011: Abstract Because the taxonomy of trematodes is based on adults, the larval stages of most digeneans cannot be identified to species based on morphology alone. Molecular data provide a means of linking larval stages to known adults. We obtained sequences from the barcode region of cytochrome oxidase I (CO1) from adult and larval parasites of fish, frogs, birds, and mammals across North America. Sequences from adult Apharyngostrigea cornu, Hysteromorpha triloba, and Alaria mustelae ... [Abstract] [Full-text] Articles on Ornithology published 18 April 2011: Tool-use and instrumental learning in the Eurasian jay (Garrulus glandarius). Anim Cogn, 14(3): 441-55. Recent research with Rooks has demonstrated impressive tool-using abilities in captivity despite this species' classification as a non-tool-user in the wild. Here, we explored whether another non-tool-using corvid, the Eurasian Jay, would be capable of similar feats and investigated the relative contributions of causal knowledge and instrumental conditioning to the birds' performance on the tasks. Five jays were tested on a variety of tasks involving water displacement. Two birds reliably ... [Abstract] [Full-text] Articles on Ornithology published 12 April 2011: Evaluating the reproductive status of the male budgerigar (Melopsittacus undulatus). Gen Comp Endocrinol, 171(3): 350-8. Limited knowledge about male psittacine reproduction reduces the success of breeding programmes. Within the scope of fecundity assessment, classification of male sexual status is essential for effective conservation of the species. The aim of the present study was to investigate the testes of male budgerigars (Melopsittacus undulatus), as psittaciform model species to verify their reproductive status by morphological and immunocytochemical examination. Using light microscopy, gonadal samples ... [Abstract] [Full-text] Articles on Ornithology published 28 March 2011: Classification of avian haemolytic Actinobacillus-like organisms (Bisgaard taxon 26) associated with anseriforme birds as Actinobacillus anseriformium sp. nov. Int J Syst Evol Microbiol. Avian haemolytic Actinobacillus-like organisms have tentatively been named Bisgaard taxon 26. Phenotypic information has been published on 65 strains of this taxon. In the current study, 31 isolates were selected for genotypic characterization. Thirty strains had the same rpoB sequence and only one strain diverged in one nt. The highest rpoB similarity to other taxa of 89.7 % was obtained to the type strain of Actinobacillus equuli subsp. haemolyticus and the similarity to the type strain of ... [Abstract] [Full-text] Classification of avian haemolytic Actinobacillus-like organisms (Bisgaard taxon 26) associated with anseriforme birds as Actinobacillus anseriformium sp. nov. Int J Syst Evol Microbiol. Avian haemolytic Actinobacillus-like organisms have tentatively been named Bisgaard taxon 26. Phenotypic information has been published on 65 strains of this taxon. In the current study, 31 isolates were selected for genotypic characterization. Thirty strains had the same rpoB sequence and only one strain diverged in one nt. The highest rpoB similarity to other taxa of 89.7 % was obtained to the type strain of Actinobacillus equuli subsp. haemolyticus and the similarity to the type strain of ... [Abstract] [Full-text] Classification of avian haemolytic Actinobacillus-like organisms (Bisgaard taxon 26) associated with anseriforme birds as Actinobacillus anseriformium sp. nov. Int J Syst Evol Microbiol. Avian haemolytic Actinobacillus-like organisms have tentatively been named Bisgaard taxon 26. Phenotypic information has been published on 65 strains of this taxon. In the current study, 31 isolates were selected for genotypic characterization. Thirty strains had the same rpoB sequence and only one strain diverged in one nt. The highest rpoB similarity to other taxa of 89.7 % was obtained to the type strain of Actinobacillus equuli subsp. haemolyticus and the similarity to the type strain of ... [Abstract] [Full-text] Articles on Ornithology published 24 March 2011: Evaluating the reproductive status of the male budgerigar (Melopsittacus undulatus). Gen Comp Endocrinol. Limited knowledge about male psittacine reproduction reduces the success of breeding programmes. Within the scope of fecundity assessment, classification of male sexual status is essential for effective conservation of the species. The aim of the present study was to investigate the testes of male budgerigars (Melopsittacus undulatus), as psittaciform model species to verify their reproductive status by morphological and immunocytochemical examination. Using light microscopy, gonadal samples ... [Abstract] [Full-text] Evaluating the reproductive status of the male budgerigar (Melopsittacus undulatus). Gen Comp Endocrinol. Limited knowledge about male psittacine reproduction reduces the success of breeding programmes. Within the scope of fecundity assessment, classification of male sexual status is essential for effective conservation of the species. The aim of the present study was to investigate the testes of male budgerigars (Melopsittacus undulatus), as psittaciform model species to verify their reproductive status by morphological and immunocytochemical examination. Using light microscopy, gonadal samples ... [Abstract] [Full-text] © 2005-2011 Ornithology Research Today. All Rights Reserved. |
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