Search Results
Results 351 - 400 of 712
< 3 4 5 6 7 8 9 10 11 12 13 >
Briones-Salas, Miguel - - 2012
During a study of rodents at Cerro Pelon, Oaxaca, Mexico, in the northwestern portion of the Sierra Madre de Oaxaca physiographic subprovince, we collected three Chinanteco deermice Habromys chinanteco. This microendemic rodent is rare in terms of habitat and population, and had not been collected in the wild since 1975. ...
Rodriguez-Ruiz, Erick - - 2012
We assessed geographical range of pacas Cuniculus paca in the northern Neotropics based on historical and recent records. We report two new records from Tamaulipas and Hidalgo. These records confirm presence of pacas in this region and support our proposed geographical range along lower elevations of eastern slopes of the ...
McAllister, Chris - - 2012
We document new geographic records in Arkansas based on the collection of 179 individual riverine fishes, representing four taxa within three families. We include new records and extensions of known geographic ranges for rarely collected species, including the shoal chub (Macrhybopsis hyostoma) and silverband shiner (Notropis shumardi) in the lower ...
Stoker, Philip - - 2012
During 2007-2008, we counted fecal deposits (n = 266) of coyotes (Canis latrans) and lagomorphs in Joshua Tree National Park, San Bernardino and Riverside counties, California, as a measure of relative abundance along 473 (115,336 [m.sup.2]) transects in three habitats differing in degree of activity by humans. We recorded abundance ...
Contreras-Balderas, Armando - - 2012
We document breeding behavior of the endangered black-capped vireo (Vireo atricapilla) in urban areas of Monterrey, Nuevo Leon, Mexico. More surveys are needed to locate breeding populations in submontane scrublands near urban areas.
Pigage, Helen - - 2012
We collected 327 Peromyscus truei (pinyon deermice), 211 P. maniculatus (North American deermice), and 38 P. leucopus (white-footed deermice) on Fort Carson Military Reservation, Pueblo County, Colorado, during May-June 2007. The deermice hosted 408 fleas including 238 Aetheca wagneri, 169 Orchopeas leucopus, and 1 Meringis parkeri. Both A. wagneri and ...
Munroe, Karen - - 2012
Sperm competition, where sperm from more than one male competes to fertilize eggs within the reproductive tract of a female, is prevalent in mammals. In rodents, this competition often has led to copulatory plugs, a passive defense against further sperm competition. Copulatory plugs have been reported in many species of ...
Acre, Matthew - - 2012
The marbled whiptail (Aspidoscelis marmorata) is a common lizard within the Chihuahuan Desert of the United States-Mexico borderlands. We report a patternless female from the Mescalero-Monahans Shinnery Sands Ecosystem in southeastern New Mexico. One previous record of this pattern has been noted in the literature and this unique morphology has ...
Harris, Arthur - - 2012
Three caves in Guadalupe Mountains National Park, Culberson County, Texas, are closely grouped spatially, and their fossil-bearing sediments are about the same late Pleistocene age. Publications concerning two of the caves, Upper Sloth Cave and Lower Sloth Cave, list and discuss their fossil faunas. Here, we add identifications of mammals ...
Ramirez, Eric - - 2012
We captured and placed radiotransmitters on 27, 37, and 51 female Rio Grande turkeys (Meleagris gallopavo intermedia) on the Encino, Norias, and Laureles divisions of King Ranch, respectively, in Brooks, Kenedy, and Kleberg counties, Texas. Mean annual sizes of home ranges were 838-5,867 ha, which were larger than most individual ...
Ramos-Lara, Nicolas - - 2012
Communal nesting has been observed frequently in arboreal squirrels of the genus Sciurus and Glaucomys, but only occasionally in Tamiasciurus. During 2006 and 2007, we trapped and radiocollared 38 adult Mearns's squirrels (Tamiasciurus mearnsi) in Baja California, Mexico, to examine their nesting behavior. We report for the first time instances ...
Rubenstahl, Trevor - - 2012
We investigated indirect effects of wind turbines on nesting success of scissor- tailed flycatchers (Tyrannus forficatus). We tracked the fate of 32 nests at Wolf Ridge Wind, LLC, Cooke County, Texas, during the breeding season in 2009. Overall rates of predation on nests were high, reproductive success was low, daily ...
Terry, Martin - - 2012
We used data on alleles of seven polymorphic microsatellite loci in 142 individuals of the star cactus Astrophytum asterias from five subpopulations to estimate genetic parameters. Four of the subpopulations had high levels of heterozygosity and allelic diversity compatible with efficient outcrossing, and low FSTAT that suggested high rates of ...
Farias, Veronica - - 2012
To identify activity patterns and distribution of gray foxes (Urocyon cinereoargenteus) in chaparral and sage-scrub habitat in southern California, we used radiotelemetry to monitor 18 foxes during May 1997-April 1999. For comparison, we used simultaneously collected telemetry data on sympatric coyotes (Canis latrans) and bobcats (Lynx rufus). Gray foxes mainly ...
Resnik, Jessica - - 2012
We monitored movements of 27 radiocollared females of the San Clemente Island fox (Urocyon littoralis clementae) during 2007 to determine the proportion that produced litters, number of offspring in weaned litters, chronology of reproduction, and characteristics of denning sites. Of 23 females, three or four produced a total of six ...
Hall, Lucas - - 2012
This study addressed the effects that cheatgrass (Bromus tectorum) had on populations of the North American deermouse (Peromyscus maniculatus) at Antelope Island State Park, Davis County, Utah. Linear regression revealed a significant negative relationship between cover of cheatgrass and relative abundance of North American deermice. These results concur with conclusions ...
Biagas, Tiffany - - 2012
During 10-weeks, visual-encounter surveys were conducted on the Georgetown salamander Eurycea naufragia at a spring pool in Williamson County, Texas. There was no significant difference in number of salamanders observed or percentage of objects used as cover between surveys in mornings and afternoons. Number of salamanders detected and percentage of ...
Woolrich-Pina, Guillermo - - 2012
We studied sexual dimorphism, reproduction, thermal ecology, and diet of Xenosaurus rectocollaris in Tehuacan Valley, Puebla, Mexico. Females were significantly larger than males, but there was no significant sexual dimorphism in size of head or length of femur. Mean size of litter was 2.6 [+ or -] 0.3 (range, 1-4) ...
Pleasant, Greg - - 2012
We report packed-cell volume and values of aspartate aminotransferase, calcium, creatine kinase, lactate dehydrogenase, total protein, triglycerides, and uric acid in plasma of 154 scaled quail (Callipepla squamata) captured during February-April 1999 and 2000 in Cochran County, Texas. Values for packed-cell volume, calcium, total protein, and uric acid were in ...
Leavitt, Daniel - - 2012
Comparisons of assemblages of rodents along the Rio Grande in Big Bend National Park, Brewster County, Texas, were made using recent (2009-2010) and historic (1977) data to evaluate the effects of invasion by saltcedars (Tamarix). Comparisons of abundances and species of rodents between sites with mesquites (Prosopis), cottonwoods (Populus), or ...
Hamilton, Donna - - 2012
For 14 months, we monitored burrow fidelity of 16 PIT-tagged female tarantulas (Aphonopelma hollyi). During this time, all of them abandoned their burrows. Using multiple- regression analyses, we determined that the model including maximum air temperature, cumulative monthly precipitation, and days of precipitation per month accounted for 48.82% of the ...
Lituma, Christopher - - 2012
We compared abundance and nesting success of dickcissels (Spiza americana) between exoticgrass and restored native-grass sites in the Blackland Prairie Region of east-central Texas during March-July 2007 and 2008. Abundance of dickcissels was 44% greater on restored than on exotic sites, but the difference was not significant. Daily survival of ...
Hammer, Rick - - 2012
To document hybridization in the Dichanthelium acuminatum complex of plants, 91 specimens were collected in southeastern Texas and assayed to determine their PCR-RFLP genotype. Two putative hybrids were confirmed as hybrids using GBSSI sequence data. Additionally, provisional evidence of the hybrid status of the specimens identified with the molecular marker ...
- - 2012
< 3 4 5 6 7 8 9 10 11 12 13 >