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Landscape-wide flight activity by wintering bats predictably follows pulses of warmth in the Midwestern United States J. Mammal. (IF 1.891) Pub Date : 2020-12-29 Robert J Arndt; Steven L Lima
During winter hibernation, bats may become active for a variety of reasons. Such winter activity occurs at or near hibernacula, but the degree to which this activity represents long-distance travel across a wider landscape largely is unstudied. We documented patterns in landscape-wide winter activity across a west-central Indiana study site, providing some new insights into winter flight activity.
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Jaguar (Panthera onca) density and tenure in a critical biological corridor J. Mammal. (IF 1.891) Pub Date : 2020-12-29 R J Foster; B J Harmsen; Y L Urbina; R L Wooldridge; C P Doncaster; H Quigley; O A Figueroa
We estimated jaguar density and tenure, and investigated ranging behavior, using camera traps across the Maya Forest Corridor, a human-influenced landscape in central Belize that forms the only remaining connection for jaguar populations inhabiting two regional forest blocks: the Selva Maya and the Maya Mountain Massif. Jaguars were ubiquitous across the study area. Similar to the neighboring Selva
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Editor’s Choice: Perspectives in Mammalogy J. Mammal. (IF 1.891) Pub Date : 2020-12-12 Luis A Ruedas
In volume 1, number 1, pp. 47–48, of the Journal of Mammalogy, the editorial for the inaugural issue by editor Ned Hollister (1876–1924), who then was Superintendent of the National Zoological Park, in part wrote:
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Are subspecies (of Eira barbara) real? J. Mammal. (IF 1.891) Pub Date : 2020-09-04 Schiaffini M, Moratelli R.
AbstractThe subspecies concept is one of the most controversial in Linnean taxonomy. In the past, subspecies were described without a clear conceptual framework, triggering confusion and motivating criticism of the very concept of a subspecies. At present, subspecies are conceived as aggregates of populations that are geographically isolated, are composed of interfertile individuals, and are morphologically
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Phylogeographic analysis reveals mito-nuclear discordance in Dasypterus intermedius J. Mammal. (IF 1.891) Pub Date : 2020-09-04 Decker S, Ammerman L, Baird A.
AbstractNorthern yellow bats (Dasypterus intermedius) are tree-roosting bats in the family Vespertilionidae comprised of two subspecies: D. intermedius intermedius and D. intermedius floridanus. The two subspecies are thought to be geographically separated. Due to their cryptic morphology, this hypothesis has never been tested and can benefit from being examined within a molecular framework. In this
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Species-specific effects of moonlight on insectivorous bat activity in central Chile J. Mammal. (IF 1.891) Pub Date : 2020-08-21 Vásquez D, Grez A, Rodríguez-San Pedro A, et al.
AbstractMoonlight intensity influences the activity patterns of bats. Some bat species reduce their activity levels during brighter nights, a phenomenon known as “lunar phobia.” While lunar phobia of bats has been extensively studied in tropical regions, the same is not the case of bats in temperate regions. By using acoustic detectors, we examined differences in the activity of insectivorous bats
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Linking population performance to nutritional condition in an alpine ungulate J. Mammal. (IF 1.891) Pub Date : 2020-08-17 Stephenson T, German D, Cassirer E, et al.
AbstractBighorn sheep (Ovis canadensis) can live in extremely harsh environments and subsist on submaintenance diets for much of the year. Under these conditions, energy stored as body fat serves as an essential reserve for supplementing dietary intake to meet metabolic demands of survival and reproduction. We developed equations to predict ingesta-free body fat in bighorn sheep using ultrasonography
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Population genetic structures at multiple spatial scales: importance of social groups in European badgers J. Mammal. (IF 1.891) Pub Date : 2020-08-17 Jacquier M, Vandel J, Léger F, et al.
AbstractPopulation viability and metapopulation dynamics are strongly affected by gene flow. Identifying ecological correlates of genetic structure and gene flow in wild populations is therefore a major issue both in evolutionary ecology and species management. Studying the genetic structure of populations also enables identification of the spatial scale at which most gene flow occurs, hence the scale
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Mark–recapture of individually distinctive calls—a case study with signature whistles of bottlenose dolphins (Tursiops truncatus) J. Mammal. (IF 1.891) Pub Date : 2020-08-17 Longden E, Elwen S, McGovern B, et al.
AbstractRobust abundance estimates of wild animal populations are needed to inform management policies and are often obtained through mark–recapture (MR) studies. Visual methods are commonly used, which limits data collection to daylight hours and good weather conditions. Passive acoustic monitoring offers an alternative, particularly if acoustic cues are naturally produced and individually distinctive
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Influence of climate change on the predicted distributions of the genus Tympanoctomys (Rodentia, Hystricomorpha, Octodontidae), and their conservation implications J. Mammal. (IF 1.891) Pub Date : 2020-08-06 Tarquino-Carbonell A, Ojeda R, Ojeda A, et al.
AbstractViscacha rats (genus Tympanoctomys Yepes, 1942) are ecologically, physiologically, and behaviorally unusual octodontid rodents endemic to the Monte and Patagonian desert biomes of Argentina. The geographic ranges of the different species of Tympanoctomys have been described in general terms but have not been associated with spatial and climate data. Within species, populations are patchily
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A complex regulating pattern induced by the effects of predation and parasites on root vole (Microtus oeconomus) populations during the breeding season J. Mammal. (IF 1.891) Pub Date : 2020-08-06 Shang G, Yang Y, Zhu Y, et al.
AbstractPredators and parasites have synergistic effects on the phenotype of the species they share as prey and host. Experimental studies that incorporate the interactions between predation and parasitism are, however, scarce in small-mammal populations. Our previous work has shown that the combined effects of predation and coccidian infection reduce overwinter survival and population density in root
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Penis morphology facilitates identification of cryptic African bat species J. Mammal. (IF 1.891) Pub Date : 2020-07-27 Fasel N, Mamba M, Monadjem A, et al.
AbstractAfrica hosts a high number of bat species, many of which have been poorly studied. Among African vesper bats (Vespertilionidae), some species are morphologically similar to each other, hampering identification in the field. Consequently, basic information on these species’ population dynamics, distributions, or behaviors is vague and/or incorrectly documented. Among some Vespertilionidae, variation
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Whither mammalian ecology? J. Mammal. (IF 1.891) Pub Date : 2020-07-23 Krebs C, Ruedas L.
AbstractThe critical agenda for mammalian ecologists over this century is to obtain a synthetic and predictive understanding of the factors that limit the distribution and abundance of mammals on Earth. During the last 100 years, a start has been made on this agenda, but only a start. Most mammal species have been described, but there still are tropical areas of undisclosed species richness. We have
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Student Programs J. Mammal. (IF 1.891) Pub Date : 2020-09-09
The ASM is deeply committed to fostering future generations of mammalogists. We support our student and early-career members financially in a variety of ways, including grants to support new and ongoing research projects, awards, fellowships, and honoraria to recognize accomplishments of students and early-career mammalogists, and travel awards to offset the costs of attending the annual meeting. Visit
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Comments and News J. Mammal. (IF 1.891) Pub Date : 2020-09-09
The American Society of Mammalogists is now accepting nominations for the C. Hart Merriam Award. The C. Hart Merriam Award is given to eminent scholars in recognition of outstanding research in mammalogy over a period of at least 10 years. C. Hart Merriam was the first chief of the Division of Economic Ornithology and Mammalogy of the United States Department of Agriculture, and a founding member of
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Books Received J. Mammal. (IF 1.891) Pub Date : 2020-09-09
Cooke, A. 2019. Muntjac and Water Deer: Natural History, Environmental Impact and Management. Pelagic Publishing. Exeter, United Kingdom. ISBN: 978-1-784-27190-9, 400 pp (paperback). £39.99.
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Coming of age: morphometric variation in the hand skeletons of juvenile and adult Lesser Treeshrews (Scandentia: Tupaiidae: Tupaia minor Günther, 1876) J. Mammal. (IF 1.891) Pub Date : 2020-08-28 Neal Woodman; Ananth Miller-Murthy; Link E Olson; Eric J Sargis
Morphometric analyses of the manus skeleton have proven useful in understanding species limits and morphological divergence among tupaiid treeshrews (Scandentia: Tupaiidae). Specimens in these studies are typically limited to mature individuals with fully erupted permanent dentition, which eliminates potentially confounding variation attributable to age, but also can exclude rare taxa and small island
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Overlapping den tree selection by three declining arboreal mammal species in an Australian tropical savanna J. Mammal. (IF 1.891) Pub Date : 2020-08-25 Cara E Penton; Leigh-Ann Woolley; Ian J Radford; Brett P Murphy
Tree cavities are important denning sites for many arboreal mammals. Knowledge of cavity requirements of individual species, as well as potential den overlap among species, is integral to their conservation. In Australia’s tropical savannas, development of tree cavities is enhanced by high termite activity, and, conversely, reduced by frequent fires. However, it is poorly understood how the availability
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The genetic structure of the spectacled bear (Tremarctos ornatus; Ursidae, Carnivora) in Colombia by means of mitochondrial and microsatellite markers J. Mammal. (IF 1.891) Pub Date : 2020-08-25 Manuel Ruiz-García; Jessica Yanina Arias Vásquez; Héctor Restrepo; Carlos Herney Cáceres-Martínez; Joseph Mark Shostell
The spectacled bear (Ursidae: Tremarctos ornatus) is an emblematic umbrella species and one of the top carnivores in the Andean mountains. It is also listed as vulnerable by IUCN and as endangered by CITES. We analyzed the genetic structure of this species in nine geographical regions representing the three Andean Cordilleras in Colombia. We sequenced six mitochondrial genes in 115 spectacled bears;
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Editor’s choice J. Mammal. (IF 1.891) Pub Date : 2020-08-17 Lorelei E Patrick; Luis A Ruedas
Years later, I still remember the moment: the instant I (LAR) was drawn into mammalogy. As an undergraduate student, I assisted my advisor, Robert C. Dowler, in a variety of research tasks. One day in 1983, he invited me to go the American Museum of Natural History (AMNH), where he had a meeting with Sydney Anderson (both were on the American Society of Mammalogists’ Legislation and Regulations Committee;
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Quantifying range decline and remaining populations of the large marsupial carnivore of Australia’s tropical rainforest J. Mammal. (IF 1.891) Pub Date : 2020-08-17 Adriana Uzqueda; Scott Burnett; Lorenzo V Bertola; Conrad J Hoskin
Large predators are particularly susceptible to population declines due to large area requirements, low population density, and conflict with humans. Their low density and secretive habits also make it difficult to know the spatial extent, size, and connectivity of populations; declines hence can go unnoticed. Here, we quantified decline in a large marsupial carnivore, the spotted-tailed quoll (Dasyurus
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Consequences of the misidentification of museum specimens: the taxonomic status of Canis lupaster soudanicus J. Mammal. (IF 1.891) Pub Date : 2020-08-06 Andrew C Kitchener; Fabio A Machado; Virginia Hayssen; Patricia D Moehlman; Suvi Viranta
Researchers are increasingly using museum collections for taxonomy, systematics, phylogenetics, and faunal analyses, and they assume that taxonomic identifications on museum labels are correct. However, identifications may be incorrect or out of date, which could result in false conclusions from subsequent research. A recent geometric morphometrics analysis of skulls of African canids by Machado and
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A new fossil cricetid (Rodentia, Sigmodontinae) from northeastern Brazil with remarks on small mammal extinctions in the tropical Quaternary J. Mammal. (IF 1.891) Pub Date : 2020-07-27 Simone B das Neves; Ulyses F J Pardiñas; Patrícia Hadler; Elver L Mayer; Ana M Ribeiro
The rare cricetid rodent Bibimys Massoia, 1980 contains three extant species that are distributed in the lowlands of eastern South America between 35°S and 20°S and distinguished mostly by subtle morphological and genetic features. Several fragmented jaws belonging to this genus were recovered from Late Quaternary deposits located in northeastern Brazil, forming part of a rich archaeological and paleontological
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Does latitudinal migration represent an advantage in the decrease of ectoparasitic loads in Leptonycteris yerbabuenae (Chiroptera)? J. Mammal. (IF 1.891) Pub Date : 2020-07-24 Daniel Zamora-Mejías; Juan B Morales-Malacara; Bernal Rodríguez-Herrera; Margarita Ojeda; Rodrigo A Medellín
Latitudinal migration increases fitness of migrants by allowing them to exploit favorable conditions in nonadjacent geographic regions. Other consequences also may follow, such as interactions with parasites. Migrants may have lower parasite prevalence and abundance than resident individuals because of their ability to abandon infested areas or due to mortality of highly infested hosts. To further
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Sexual dimorphism in skeletal shape in voles (Arvicolinae): disparate selection on male bodies and female heads J. Mammal. (IF 1.891) Pub Date : 2020-07-23 Jeremy S Morris; Nala Rogers; Alan R Rogers; David R Carrier
Sexual dimorphism evolves as a response to different selective pressures on males and females. In mammals, sexual selection on traits that improve a male’s ability to compete for access to mates is a common cause of sexual dimorphism. In addition to body mass, adaptations in specific components of the musculoskeletal system that increase strength, stability, and agility, may improve male fighting performance
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Drought-mediated changes in black-tailed prairie dog colonies in the Northern Great Plains J. Mammal. (IF 1.891) Pub Date : 2020-07-23 Jason E Bruggeman; Daniel S Licht
Populations of many mammal species living in grassland ecosystems across North America have been reduced greatly over the past 200 years due to conversion of native prairie to human-related uses. Foremost among these species is the black-tailed prairie dog (Cynomys ludovicianus), populations of which have declined an estimated 98% during that time. In addition to anthropogenic factors including plague
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Innovations that changed mammalogy: field techniques for karyotyping J. Mammal. (IF 1.891) Pub Date : 2020-09-04 Hugh H Genoways; Robert M Timm; Suzanne B McLaren
Our fourth selection for an innovation that changed mammalogy is actually a series of innovations that accumulated over a period of at least 15 years, and opened the way for researchers to be able to karyotype wild mammals under the most challenging fieldwork conditions. By 1950, the basics of chromosomes were understood, but getting accurate chromosome counts was “exceedingly tedious and often inaccurate”
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Summer roosts of “The revenant” flat-headed myotis, Myotis planiceps J. Mammal. (IF 1.891) Pub Date : 2020-08-21 María Paulina Núñez-Rojo; Joaquín Arroyo-Cabrales; Emmanuel Rivera-Téllez; Rodrigo A Medellín
The flat-headed myotis (Myotis planiceps) was declared extinct in 1996 but rediscovered in 2004, thus the reference to a revenant, one who came back from the dead, as it was declared extinct in 1996 but rediscovered in 2004. However, the species still faces serious extinction risk. To aid in the strategic planning and priorities for conservation, we studied roosting ecology. These bats inhabit the
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Ultraviolet vision in Ord’s kangaroo rat (Dipodomys ordii) J. Mammal. (IF 1.891) Pub Date : 2020-08-18 Brandon McDonald; Bryce Geiger; Sarah Vrla
Knowledge of a species’ visual system has far reaching implications that affect our understanding of a species’ ecology and evolutionary history. As a model taxon, the heteromyid rodent genus Dipodomys has been valuable in elucidating patterns and mechanisms in biomechanics, ecology, adaptive physiology, biogeography, and more. Although studied extensively, the visual system of Dipodomys has not been
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Comparing fitness measures and the influence of age of first reproduction in Columbian ground squirrels J. Mammal. (IF 1.891) Pub Date : 2020-08-07 Kristin K Rubach; F Stephen Dobson; Bertram Zinner; Jan O Murie; Vincent A Viblanc
The timing of life-history traits may have strong influences on the evolution of life cycles and on population demography. This is especially true of the age at which females first reproduce (Cole’s principle). We examined whether the age at which females first reproduce influences fitness in Columbian ground squirrels (Urocitellus columbianus), for which females varied in the age at which they initially
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Qualitative synthesis of temperate bat responses to silvicultural treatments—where do we go from here? J. Mammal. (IF 1.891) Pub Date : 2020-08-06 Susan C Loeb
Most bat species depend on forests for roosting, foraging, and drinking during part or all of their life cycles. Many of the world’s forests are managed using a variety of silvicultural treatments and, over the past 40 years, researchers have studied the responses of bats to these treatments. I carried out a qualitative synthesis of the literature on roosting and foraging responses of temperate insectivorous
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Partitioning beta diversity to unravel mechanisms underlying the distributions of nonvolant small mammls in Brazil’s Cerrado J. Mammal. (IF 1.891) Pub Date : 2020-08-06 Raquel Ribeiro; Robert E Ricklefs; Jader Marinho-Filho
Species distributions and the mechanisms that produce patterns in the occupation space are recurrent themes in community ecology. Here, we examine beta diversity among assemblages of small mammals in the Cerrado domain of Brazil to partition the effects of turnover and nestedness on species distributions. Our objective was to evaluate whether balanced spatial variation in abundance (β bal) and abundance
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Books Received J. Mammal. (IF 1.891) Pub Date : 2020-07-03
Reyna-Hurtado, R., and C. A. Chapman. 2019. Movement ecology of Neotropical forest mammals: focus on social mammals. Springer, Cham, Switzerland. ISBN: 978-3-030-03463-4, 274 pp (hardcover). $159.99.
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Student Programs J. Mammal. (IF 1.891) Pub Date : 2020-07-03
The ASM is deeply committed to fostering future generations of mammalogists. We support our student and early-career members financially in a variety of ways, including grants to support new and ongoing research projects, awards, fellowships, and honoraria to recognize accomplishments of students and early-career mammalogists, and travel awards to offset the costs of attending the annual meeting. Visit
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Editor’s choice J. Mammal. (IF 1.891) Pub Date : 2020-07-03 Luis A Ruedas
For 6 months, from November 1926 to April 1927, The Field Museum–Chicago Daily News Abyssinian Expedition, under the direction of Wilfred Hudson Osgood, Chief Curator of Zoology at the Field Museum, collected extensively throughout what now is Ethiopia, eventually assembling a synoptic sample of over 1,300 specimens. Despite the publication of a 50-page article in National Geographic (Osgood 1928a)
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Comments and News J. Mammal. (IF 1.891) Pub Date : 2020-07-03
The American Society of Mammalogists is now accepting nominations for the C. Hart Merriam Award. The C. Hart Merriam Award is given to eminent scholars in recognition of outstanding research in mammalogy over a period of at least 10 years. C. Hart Merriam was the first chief of the Division of Economic Ornithology and Mammalogy of the United States Department of Agriculture, and a founding member of
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Corrigendum to: State-dependent foraging by caribou with different nutritional requirements. J. Mammal. (IF 1.891) Pub Date : 2020-07-03 Kristin Denryter,Rachel C Cook,John G Cook,Katherine L Parker,Michael P Gillingham
In the paper “State-dependent foraging by caribou with different nutritional requirements,” equation 3 was reported incorrectly in the Results and Supplementary Data SD3. The last paragraph of the Results should read:
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Panmixia in a sea ice-associated marine mammal: evaluating genetic structure of the Pacific walrus (Odobenus rosmarus divergens) at multiple spatial scales J. Mammal. (IF 1.891) Pub Date : 2020-06-02 William S Beatty; Patrick R Lemons; Suresh A Sethi; Jason P Everett; Cara J Lewis; Robert J Lynn; Geoffrey M Cook; Joel L Garlich-Miller; John K Wenburg
The kin structure of a species at relatively fine spatial scales impacts broad-scale patterns in genetic structure at the population level. However, kin structure rarely has been elucidated for migratory marine mammals. The Pacific walrus (Odobenus rosmarus divergens) exhibits migratory behavior linked to seasonal patterns in sea ice dynamics. Consequently, information on the spatial genetic structure
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Potential female mate choice in a male dominated system: the female capybara, Hydrochoerus hydrochaeris J. Mammal. (IF 1.891) Pub Date : 2020-05-29 Miguel A Bedoya-Pérez; Emilio A Herrera; Elizabeth R Congdon
Capybaras, Hydrochoerus hydrochaeris (Rodentia: Caviidae: Hydrochoerinae), show a strict social hierarchy among males, wherein the top-ranking male gains preferential access to females. Despite minimal sexual size dimorphism, males have a prominent scent gland on their snouts that is greatly reduced in the females. Top-ranking males have a larger gland and mark more frequently than subordinate males
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Innovations that changed Mammalogy: the Japanese mist net J. Mammal. (IF 1.891) Pub Date : 2020-05-26 Hugh H Genoways; Suzanne B McLaren; Robert M Timm
Our second selection for an innovation that changed mammalogy is the Japanese mist net, which was a repurposing of a centuries old invention. Prior to the availability of these nets, mammalogists had limited ability to sample members of the order Chiroptera. Samples of bats were obtained primarily from day roosts or hibernacula, or by shooting them in the evening twilight as they hawked insects. Tropical
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A new species and three subspecies of the desert shrew (Notiosorex) from the Baja California peninsula and California J. Mammal. (IF 1.891) Pub Date : 2020-05-22 Issac Camargo; Sergio Ticul Álvarez-Castañeda
Desert shrews of the genus Notiosorex comprise four species with morphological characteristics that are difficult to distinguish among the species. Indeed, N. cockrumi was described using only genetic markers. Based on molecular divergence documented in N. crawfordi, we hypothesize that a fifth species is present in the Baja California peninsula. Genetic variation at the species level was analyzed
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Dominance hierarchy on palm resource partitioning among Neotropical frugivorous mammals J. Mammal. (IF 1.891) Pub Date : 2020-05-18 Paula Akkawi; Nacho Villar; Calebe P Mendes; Mauro Galetti
In tropical forests, the diets of many frugivorous mammals overlap, yet how hyper-diverse assemblages of consumers exploit resources and coexist remains poorly understood. We evaluated competitive interactions among three species of terrestrial frugivorous mammals, the ungulate Tayassu pecari (white-lipped peccary), its close relative Pecari tajacu (collared peccary), and a large rodent (Dasyprocta
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Integrative taxonomy of extant maras supports the recognition of the genera Pediolagus and Dolichotis within the Dolichotinae (Rodentia, Caviidae) J. Mammal. (IF 1.891) Pub Date : 2020-05-12 Denise H Campo; Diego A Caraballo; Guillermo H Cassini; Sergio O Lucero; Pablo Teta
The subfamily Dolichotinae (Rodentia, Caviidae) includes two living species (Dolichotis patagonum and D. salinicola) of cursorial, long-legged rodents that inhabit semiarid thorn scrubs and shrublands in southern South America. Some authors consider that the morphological differences between D. patagonum and D. salinicola warrant circumscription of the latter in its own genus, Pediolagus. Based on
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Small terrestrial mammal distributions in Simien Mountains National Park, Ethiopia: a reassessment after 88 years J. Mammal. (IF 1.891) Pub Date : 2020-05-05 Evan W Craig; William T Stanley; Julian C Kerbis Peterhans; Josef Bryja; Yonas Meheretu
Despite the presence of mostly endemic species, the most comprehensive data set on the distribution and ecology of small mammals inhabiting Simien Mountains National Park (SMNP) dated from 1927. The study we carried out and report here provides a unique opportunity to assess the possible role of climate change over the last 88 years on the elevational distribution of mammals in the Ethiopian highlands
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A question of size and fear: competition and predation risk perception among frugivores and predators J. Mammal. (IF 1.891) Pub Date : 2020-05-05 Daiane Cristina Carreira; Jedediah F Brodie; Calebe P Mendes; Katia Maria P M B Ferraz; Mauro Galetti
Mammalian spatial and temporal activity patterns can vary depending on foraging behavior or the perception of predation or competition risk among species. These behaviors may in turn be altered by human influences such as defaunation. Herein, we evaluate whether frugivores avoid areas with high visitation rates by potential predators or competitors, and whether this avoidance changes in areas with
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Investigating the role of environment in pika (Ochotona) body size patterns across taxonomic levels, space, and time J. Mammal. (IF 1.891) Pub Date : 2020-05-05 Marie L Westover; Felisa A Smith
Body size is an important trait in animals because it influences a multitude of additional life history traits. The causal mechanisms underlying body size patterns across spatial, temporal, and taxonomic hierarchies are debated, and of renewed interest in this era of climate change. Here, we tested multiple hypotheses regarding body mass patterns at the intraspecific and interspecific levels. We investigated
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Genetic diversity, population structure, and immigration, in a partially hunted puma population of south-central Argentina J. Mammal. (IF 1.891) Pub Date : 2020-05-05 Orlando Gallo; Diego F Castillo; Raquel Godinho; Emma B Casanave
Carnivores are decreasing globally due in part to anthropogenic ecological disturbances. In Argentina, human activities have fragmented wildlife habitat, thereby intensifying puma–livestock conflict and leading to population control of the predator species by hunting. We investigated genetic variability and population structure of pumas (Puma concolor) from three south-central Argentine provinces with
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Gross stomach morphology in akodontine rodents (Cricetidae: Sigmodontinae: Akodontini): a reappraisal of its significance in a phylogenetic context J. Mammal. (IF 1.891) Pub Date : 2020-05-05 Ulyses F J Pardiñas; Carola Cañón; Carlos A Galliari; Jorge Brito; Nuria Bernal Hoverud; Gisele Lessa; João Alves de Oliveira
Akodontini, the second largest tribe within sigmodontine rodents, encompasses several stomach morphologies. This is striking because most sigmodontine groups of comparable taxonomic rank are very conservative in this respect. Based on extensive sampling of newly dissected specimens (213 stomachs representing 36 species), as well as published examples, covering almost all akodontine living genera (15
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Genetic signature of disease epizootic and reintroduction history in an endangered carnivore J. Mammal. (IF 1.891) Pub Date : 2020-04-29 Payton Phillips; Travis M Livieri; Bradley J Swanson
Emerging infectious diseases have recently increased in wildlife and can result in population declines and the loss of genetic diversity in susceptible populations. As populations of impacted species decline, genetic diversity can be lost, with ramifications including reduced effective population size and increased population structuring. For species of conservation concern, which may already have
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Landscape genetics of wolverines (Gulo gulo): scale-dependent effects of bioclimatic, topographic, and anthropogenic variables. J. Mammal. (IF 1.891) Pub Date : 2020-04-28 Niko Balkenhol,Michael K Schwartz,Robert M Inman,Jeffrey P Copeland,John S Squires,Neil J Anderson,Lisette P Waits
Climate change can have particularly severe consequences for high-elevation species that are well-adapted to long-lasting snow conditions within their habitats. One such species is the wolverine, Gulo gulo, with several studies showing a strong, year-round association of the species with the area defined by persistent spring snow cover. This bioclimatic niche also predicts successful dispersal paths
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Distribution and conservation status of the endangered Montagne d’Ambre fork-marked lemur (Phaner electromontis) J. Mammal. (IF 1.891) Pub Date : 2020-06-26 Daniel Hending; Gabriele M Sgarlata; Barbara Le Pors; Emmanuel Rasolondraibe; Fabien Jan; Ando N Rakotonanahary; Tantely N Ralantoharijaona; Stéphane Debulois; Angelo Andrianiaina; Sam Cotton; Solofonirina Rasoloharijaona; John R Zaonarivelo; Nicole V Andriaholinirina; Lounès Chikhi; Jordi Salmona
The geographic distribution of a species can provide insights into its population size, ecology, evolution, and how it responded to past (and may respond to future) environmental change. Improving our knowledge of the distribution of threatened species thus is a high priority in assessing their conservation status. However, there are few data available for many recently described yet understudied and
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Ambiguities in using telomere length for age determination in two North American bat species J. Mammal. (IF 1.891) Pub Date : 2020-06-25 Katherine M Ineson; Thomas J O’Shea; C William Kilpatrick; Katy L Parise; Jeffrey T Foster
The age of an animal, determined by time (chronological age) as well as genetic and environmental factors (biological age), influences the likelihood of mortality and reproduction and thus the animal’s contribution to population growth. For many long-lived species, such as bats, a lack of external and morphological indicators has made determining age a challenge, leading researchers to examine genetic
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Innovations that changed Mammalogy: dermestid beetles—the better way to clean skulls J. Mammal. (IF 1.891) Pub Date : 2020-06-22 Robert M Timm; Suzanne B McLaren; Hugh H Genoways
The use of dermestid beetles to clean vertebrate skulls and postcranial skeletons is a technique that results in beautiful skeletal preparations. The widely distributed carrion beetle, Dermestes maculatus (Coleoptera, Dermestidae), often called the hide beetle, is the most commonly used species (Fig. 1). The innovation of using beetles that generally are thought of as pests in households, stored grain
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Genetic assays for guano-based identification of species and sex in bats of the United States and Canada J. Mammal. (IF 1.891) Pub Date : 2020-06-20 Xin Guan; Eric R Britzke; Antoinette J Piaggio; David L Bergman; Lolita Van Pelt; Richard F Lance
Bat guano is a noninvasive, data-rich genetic resource. However, the constituent bat DNA is relatively scant, degraded, and complexed with polymerase chain reaction inhibitors. It also is comingled with a rich pool of nontarget DNA from microbes, parasites, and dietary items. We designed and tested new DNA assays for bat species identification (COX1-Bat) and sex identification (XGXYC) for use with
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Determining sex of adult Pacific walruses from mandible measurements J. Mammal. (IF 1.891) Pub Date : 2020-06-20 Nathan Taylor; Casey T Clark; Nicole Misarti; Lara Horstmann
Pacific walruses (Odobenus rosmarus divergens) play a vital role in Arctic marine ecosystems and the subsistence lifestyle of Alaska Native communities. Museum collections contain numerous archaeological and historic walrus specimens that have proven useful in a variety of studies; however, for many cases, the sex of these specimens is unknown. Sexes of adult (> 5 years determined by tooth aging) Atlantic
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Breeding patterns of female prairie voles (Microtus ochrogaster) displaying alternative reproductive tactics J. Mammal. (IF 1.891) Pub Date : 2020-06-16 James B Lichter; Connor T Lambert; Nancy G Solomon; Brian Keane
Individuals of either sex may display alternative behaviors to obtain copulations, but few studies have examined the breeding patterns of females and males in populations where individuals of both sexes exhibit alternative reproductive tactics (ARTs). In prairie voles (Microtus ochrogaster), most adults are territorial, residing at a single nest site either as male–female pairs or as solitary individuals
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Predicting the distribution of a rare chipmunk (Neotamias quadrivittatus oscuraensis): comparing MaxEnt and occupancy models J. Mammal. (IF 1.891) Pub Date : 2020-06-16 Ian E Perkins-Taylor; Jennifer K Frey
Species distribution models (SDMs) use presence records to determine the relationship between species occurrence and various environmental variables to create predictive maps describing the species’ distribution. The Oscura Mountains Colorado chipmunk (Neotamias quadrivittatus oscuraensis) occurs in central New Mexico and is of conservation concern due to its relict distribution and threats to habitat
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Training fails to elicit behavioral change in a marsupial suffering evolutionary loss of antipredator behaviors J. Mammal. (IF 1.891) Pub Date : 2020-06-16 Chris J Jolly; Jonathan K Webb; Graeme R Gillespie; Ben L Phillips
Attempts to reintroduce threatened species from ex situ populations (zoos or predator-free sanctuaries) regularly fail because of predation. When removed from their natural predators, animals may lose their ability to recognize predators and thus fail to adopt appropriate antipredator behaviors. Recently, northern quolls (Dasyurus hallucatus; Dasyuromorpha: Dasyuridae) conserved on a predator-free
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Hematologic adaptation to the subterranean environment by the naked mole-rat, Heterocephalus glaber (Ctenohystrica: Heterocephalidae) J. Mammal. (IF 1.891) Pub Date : 2020-06-13 Susanne Holtze; Rosie Koch; Thomas Bernd Hildebrandt; Alemayehu Lemma; Karol Szafranski; Matthias Platzer; Fitsum Alemayehu; Frank Goeritz; Stan Braude
One method burrowing animals are hypothesized to use in adapting to the presumed hypoxic subterranean environment is increasing the oxygen-carrying capacity of blood. A number of recent studies have examined hematologic parameters in laboratory-reared naked mole-rats, but not in animals living under natural atmospheric conditions. To our knowledge, blood chemistry parameters have never been systematically
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Pronghorn population genomics show connectivity in the core of their range J. Mammal. (IF 1.891) Pub Date : 2020-05-29 Melanie E F LaCava; Roderick B Gagne; Sierra M Love Stowell; Kyle D Gustafson; C Alex Buerkle; Lee Knox; Holly B Ernest
Preserving connectivity in the core of a species’ range is crucial for long-term persistence. However, a combination of ecological characteristics, social behavior, and landscape features can reduce connectivity among wildlife populations and lead to genetic structure. Pronghorn (Antilocapra americana), for example, exhibit fluctuating herd dynamics and variable seasonal migration strategies, but GPS
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