| physiological resistance of grasshopper mice (onychomys spp.) to arizona bark scorpion (centruroides exilicauda) venom. | predators feeding on toxic prey may evolve physiological resistance to the preys' toxins. grasshopper mice (onychomys spp.) are voracious predators of scorpions in north american deserts. two species of grasshopper mice (onychomys torridus and onychomys arenicola) are broadly sympatric with two species of potentially lethal bark scorpion (centruroides exilicauda and centruroides vittatus) in the sonoran and chihuahuan deserts, respectively. bark scorpions produce toxins that selectively bind sod ... | 2008 | 18687353 |
| nematofauna of rodents of the families heteromyidae and cricetidae from the mexican plateau. | as a part of an ongoing project to inventory the helminth parasites of rodents in mexico, 85 specimens of 2 families of rodents were collected from the mexican plateau: cricetidae ( neotoma sp., neotoma leucodon , onychomys arenicola , peromyscus sp., peromyscus eremicus , and reithrodontomys sp.) and heteromyidae ( chaetodipus sp., chaetodipus eremicus , chaetodipus hispidus , dipodomys merriami , dipodomys ordii , dipodomys ornatus, dipodomys spectabilis , liomys irroratus , perognathus sp., a ... | 2017 | 27788020 |
| functional characterization and spatial clustering of visual cortical neurons in the predatory grasshopper mouse onychomys arenicola. | mammalian neocortical circuits are functionally organized such that the selectivity of individual neurons systematically shifts across the cortical surface, forming a continuous map. maps of the sensory space exist in cortex, such as retinotopic maps in the visual system or tonotopic maps in the auditory system, but other functional response properties also may be similarly organized. for example, many carnivores and primates possess a map for orientation selectivity in primary visual cortex (v1 ... | 2017 | 27927787 |
| cross-fostering alters advertisement vocalizations of grasshopper mice (onychomys): evidence for the developmental stress hypothesis. | nutritional stress can have lasting impacts on the development of traits involved in vocal production. cross-fostering experiments are often used to examine the propensity for vocal learning in a variety of taxa, but few studies assess the influence of malnourishment that can occur as a byproduct of this technique. in this study, we reciprocally cross-fostered sister taxa of voluble grasshopper mice (genus onychomys) to explore their propensity for vocal learning. vocalizations of onychomys leuc ... | 2016 | 26873411 |
| a new eimeria species (apicomplexa: eimeriidae) infecting onychomys species (rodentia: muridae) in new mexico and arizona. | fecal samples from 3 species of onychomys (rodentia: muridae) captured in new mexico and arizona were examined for coccidia. six of the 59 (10%) were infected with a new species of eimeria. sporulated oocysts (n = 105) of this new species are subspheroidal, 17.4 x 16.1 (14-21 x 13-19) microm, with ellipsoidal sporocysts 10.4 x 5.7 (9-12 x 5-8) microm. this species occurred in 3 of 24 (13%) onychomys arenicola, 2 of 31 (6%) onychomys leucogaster from new mexico, and 1 of 4 (25%) onychomys torridu ... | 1998 | 9920315 |
| vocal divergence is concordant with genomic evidence for strong reproductive isolation in grasshopper mice (onychomys). | behavioral barriers to gene flow often evolve faster than intrinsic incompatibilities and can eliminate the opportunity for hybridization between interfertile species. while acoustic signal divergence is a common driver of premating isolation in birds and insects, its contribution to speciation in mammals is less studied. here we characterize the incidence of, and potential barriers to, hybridization among three closely related species of grasshopper mice (genus onychomys). all three species use ... | 2019 | 31788222 |