| cytonuclear discordance across a leopard frog contact zone. | we conducted a genetic analysis of the extent of hybridization within and outside a contact zone between two north american leopard frogs, rana blairi and rana pipiens by comparing distribution patterns of mitochondrial and nuclear haplotypes. the contact zone, located between south dakota, nebraska, and iowa, usa, was previously examined using morphological data in the 1970s, leading to the conclusion that hybridization was rare between r. pipiens and r. blairi. our genetic analysis of 51 popul ... | 2007 | 17689987 |
| gonadal abnormalities in frogs (lithobates spp.) collected from managed wetlands in an agricultural region of nebraska, usa. | nebraska's rainwater basin (rwb) provides important wetland habitat for north american migratory birds. concern exists that pesticide and nutrient runoff from surrounding row-crops enters wetlands degrading water quality and adversely affecting birds and wildlife. frogs may be especially vulnerable. plains leopard (lithobates blairi) metamorphs from rwb wetlands with varying concentrations of pesticides were evaluated for a suite of biomarkers of exposure to endocrine active chemicals. froglets ... | 2013 | 22982548 |
| observations on the life history and descriptions of coccidia (apicomplexa) from the western chorus frog, pseudacris triseriata triseriata, from eastern nebraska. | two hundred and twenty-four anurans of 6 species (47 adults and 16 tadpoles of rana blairi, 35 r. catesbeiana, 31 hyla chrysoscelis, 30 adults and 46 tadpoles of pseudacris triseriata triseriata, 11 bufo woodhousii, and 8 acris crepitans) from pawnee lake, lancaster county, nebraska, were surveyed for coccidian parasites during march 2001 to may 2002. of these, 23 of 30 (77%) adults and 4 of 46 (9%) tadpoles of p. t. triseriata shed oocysts of isospora cogginsi n. sp. oocysts of i. cogginsi were ... | 2003 | 12880252 |
| a new species of myxidium (myxosporea: myxidiidae), from the western chorus frog, pseudacris triseriata triseriata, and blanchard's cricket frog, acris crepitans blanchardi (hylidae), from eastern nebraska: morphology, phylogeny, and critical comments on amphibian myxidium taxonomy. | during march 2001-april 2004, 164 adult anurans of 6 species (47 rana blairi, 35 rana catesbeiana, 31 hyla chrysoscelis, 31 pseudacris triseriata triseriata, 11 bufo woodhousii, and 9 acris crepitans blanchardi) from pawnee lake, lancaster county, nebraska, were surveyed for myxozoan parasites. of these, 20 of 31 (65%) p. triseriata triseriata and 1 of 9 (11%) a. crepitans blanchardi were infected with a new species of myxidium. myxidium melleni n. sp. (myxosporea) is described from the gallblad ... | 2006 | 16884007 |
| co-occurrence of haematoloechus complexus and rhabdias joaquinensis in the plains leopard frog from nebraska. | species of haematoloechus and rhabdias both are ubiquitous lung parasites of frogs, yet surprisingly little research has been conducted on the interactions between these worms. in a small nebraska stream, 256 rhabdias joaquinensis and 225 haematoloechus complexus were found in the lungs of lithobates (=rana) blairi. thirty-six of the 44 (82%) frogs were co-infected with h. complexus and r. joaquinensis whereas 5 (11%) frogs were infected with only 1 species and 3 (7%) frogs were uninfected. test ... | 2013 | 23116463 |
| distribution and reproductive strategies of gyrinicola batrachiensis (oxyuroidea: pharyngodonidae) in larvae of eight species of amphibians from nebraska. | abstract a total of 462 tadpoles and salamander larvae of 8 species was examined for the presence of gyrinicola batrachiensis from 5 locations in nebraska. infection by g. batrachiensis occurred in tadpoles of rana blairi, r. catesbeiana, r. pipiens, and bufo woodhousii. tadpoles of hyla chrysoscelis, spea bombifrons, and pseudacris maculata and larvae of ambystoma mavortium were not infected with g. batrachiensis. population structure, defined as prevalence, mean abundance, and mean intensity o ... | 2011 | 21506837 |