| geographic and ontogenic variation in venom of the western diamondback rattlesnake (crotalus atrox). | venom samples from western diamondback rattlesnakes (crotalus atrox) from 13 localities in the united states were tested for i.v. and s.c. lethality for mice, protease activity, hemorrhagic activity, and the presence of mojave toxin. electrophoresis on polyacrylamide gel was used to compare protein composition. the neutralizing effect of two commercial antivenoms was evaluated against selected samples of venom. venom of young snakes from north texas was compared with that of adults from the same ... | 1986 | 3513378 |
| coccidian parasites (apicomplexa) from snakes in the southcentral and southwestern united states: new host and geographic records. | four hundred thirty-five leptotyphlopid, colubrid, elapid, and viperid snakes were collected from various localities in arkansas, new mexico, oklahoma, and texas, and their feces were examined for coccidian parasites. of these, 131 (30%) were passing oocysts or sporocysts of at least 1 coccidian; 88 (67%) of the infected snakes had only 1 species of coccidian when they were examined. aquatic and semiaquatic snakes accounted for 48% of the infections, whereas strictly terrestrial snakes comprised ... | 1995 | 7876980 |
| phylogeographic structure and historical demography of the western diamondback rattlesnake (crotalus atrox): a perspective on north american desert biogeography. | the western diamondback rattlesnake (crotalus atrox) is a prominent member of north american desert and semi-arid ecosystems, and its importance extends from its impact on the region's ecology and imagery, to its medical relevance as a large deadly venomous snake. we used mtdna sequences to identify population genetic structure and historical demographic patterns across the range of this species, and relate these to broader patterns of historical biogeography of desert and semi-arid regions of t ... | 2007 | 16934495 |
| some blood values of the western diamond-back rattlesnake (crotalus atrox) from south texas. | hematologic values of the western diamond-back rattlesnake (crotalus atrox) from south texas were determined by standard techniques. the means of the principal blood measurements were 0.68 +/- 0.20 million erythrocytes/mm3, 31.9 +/- 4.6% hematocrit and 10.0 +/- 1.8 gm% hemoglobin. a comparison of hematologic values of snakes is given. | 1977 | 916141 |