Publications

frequency shifting reduces but does not eliminate acoustic interference between echolocating bats: a theoretical analysis.	bats have been observed to shift the frequency of their echolocation calls in the presence of other echolocating bats, ostensibly as a way to reduce acoustic interference. few studies, however, have examined the theoretical efficacy of such jamming avoidance responses. the present study uses the wideband ambiguity function to analyze the effects of acoustic interference from conspecifics and congeneric heterospecifics on the target acquisition ability of myotis californicus and myotis yumanensis ...	2017	29092549
patterns of bat distribution and foraging activity in a highly urbanized temperate environment.	understanding how to manage biodiversity in urban areas will become increasingly important as density of humans residing in urban centers increases and urban areas expand. while considerable research has documented the shifts in biodiversity along urbanization gradients, much less work has focused on how characteristics of dense urban centers, effectively novel environments, influence behavior and biodiversity. urban bats in san francisco provide an opportunity to document changes in behavior an ...	2016	28030640
potential effects of environmental contamination on yuma myotis demography and population growth.	unplanned natural and anthropogenic disasters provide unique opportunities for investigating the influence of perturbations on population vital rates and species recovery times. we investigated the potential effects of a major pesticide spill by comparing annual survival rates using mark-recapture techniques on a riparian bat species, yuma myotis (myotis yumanensis). demography and population dynamics for most bat species remain poorly understood despite advances in mark-recapture estimation and ...	2007	17555229
echo-location of bats after ablation of auditory cortex.	1. echo-location of blinded yuma bats (myotis yumanensis) was studied after ablation of the auditory cortex (a.c.). a task of obstacle-avoidance was given to the bats. hits and misses of strands were counted, and orientation sounds emitted by the bats during flight were recorded.2. after bilateral ablation of a.c., two bats out of six failed to avoid even large obstacles such as 3.7 mm strands and wall. these bats emitted orientation sounds at a rate of 10-15/sec during flight, but did not chang ...	1969	16992341
digenetic trematodes, acanthatrium sp. and lecithodendrium sp., as vectors of neorickettsia risticii, the agent of potomac horse fever.	neorickettsia (formerly ehrlichia) risticii, the agent of potomac horse fever (phf), has been recently detected in trematode stages found in the secretions of freshwater snails and in aquatic insects. insectivores, such as bats and birds, may serve as the definitive host of the trematode vector. to determine the definitive helminth vector, five bats (myotis yumanensis) and three swallows (hirundo rustica, tachycineta bicolor) were collected from a phf endemic location in northern california. bat ...	2003	14627451
bat ectoparasites from the trans-pecos region of texas, including notes from big bend national park.	ectoparasites of 13 species of molossid, mormoopid, and vespertilionid bats from the trans-pecos region of texas were studied, as follows: antrozous pallidus (leconte), corynorhinus townsendii (cooper), eptesicus fuscus (palisot de beauvois), lasiurus cinereus (palisot de beauvois), mormoops megalophylla (peters), myotis thysanodes g. s. miller, myotis velifer (j. a. allen), myotis volans (h. allen), myotis yumanensis (h. allen), nyctinomops femorosaccus (merriam), nyctinomops macrotis (gray), p ...	2001	11372965
six new eimeria species from vespertilionid bats of north america.	twenty species of bats (molossidae, vespertilionidae) were collected from california, new mexico, oregon, south carolina, utah, and baja california norte (mexico), and 29 of 404 (7%) animals, including antrozous pallidus, eptesicus fuscus, myotis auriculus, myotis californicus, myotis ciliolabrum, myotis evotis, myotis lucifugus, myotis thysanodes, myotis vivesi, myotis volans, myotis yumanensis, and nycticeius humeralis were infected with eimeria spp., which represent 6 new species. sporulated ...	1999	10386443
eimeria from bats of the world: two new species from myotis spp. (chiroptera: vespertilionidae).	between 1986 and 1995, 548 fecal samples were collected from 41 species of bats (molossidae, mormoopidae, phyllostomidae, thyropteridae, and vespertilionidae) from new mexico, california, baja california sur (mexico), and bolivia. of these, the feces of 28 (5%) bats, including antrozous pallidus, myotis ciliolabrum, myotis lucifugus, and myotis yumanensis (vespertilionidae), contained oocysts representing at least 3 species of eimeria. a new species of eimerian from m. lucifugus (3/27, 11%) and ...	1997	9194833
echo-location and evoked potentials of bats after ablation of inferior colliculus.	1. echo-location and evoked potentials of blinded yuma bats (myotis yumanensis) were studied before and after ablation of the inferior colliculus (i.c.). a task of obstacle-avoidance was given to the bats: hits and misses of strands in the flight path were counted. orientation sounds emitted by the bats during flight were recorded.2. bilateral ablation of the dorso-medial region of i.c. including the internuclear cortex and commissure had no effect on obstacle-avoidance performance. the bats avo ...	1969	5387030