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  • Penis morphology facilitates identification of cryptic African bat species
    J. Mammal. (IF 1.891) Pub Date : 2020-07-27
    Nicolas J Fasel; Mnqobi L Mamba; Ara Monadjem

    Africa 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

    更新日期:2020-07-27
  • 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

    更新日期:2020-07-27
  • 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

    更新日期:2020-07-24
  • 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

    更新日期:2020-07-24
  • 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

    更新日期:2020-07-24
  • Whither mammalian ecology?
    J. Mammal. (IF 1.891) Pub Date : 2020-07-23
    Charles J Krebs

    The 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 been measuring

    更新日期:2020-07-24
  • 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.

    更新日期:2020-07-05
  • 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

    更新日期:2020-07-05
  • 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)

    更新日期:2020-07-05
  • 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

    更新日期:2020-07-05
  • 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:

    更新日期:2020-07-05
  • 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

    更新日期:2020-07-05
  • 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

    更新日期:2020-07-05
  • 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

    更新日期:2020-07-05
  • 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

    更新日期:2020-07-05
  • 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

    更新日期:2020-07-05
  • 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

    更新日期:2020-07-05
  • 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

    更新日期:2020-07-05
  • 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

    更新日期:2020-07-05
  • 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

    更新日期:2020-07-05
  • 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

    更新日期:2020-07-05
  • 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

    更新日期:2020-07-05
  • 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

    更新日期:2020-07-05
  • 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

    更新日期:2020-07-05
  • 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

    更新日期:2020-06-26
  • 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

    更新日期:2020-06-25
  • 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

    更新日期:2020-06-23
  • 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

    更新日期:2020-06-23
  • 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

    更新日期:2020-06-23
  • 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

    更新日期:2020-06-16
  • 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

    更新日期:2020-06-13
  • 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

    更新日期:2020-05-29
  • A comparison of density estimation methods in plateau pika populations in an alpine meadow ecosystem
    J. Mammal. (IF 1.891) Pub Date : 2020-05-29
    Wanrong Wei; Jundong He; Qiaoyan Zheng; Yuli He; Maria K Oosthuizen

    Plateau pikas are a keystone species and ecosystem engineers in alpine meadow ecosystems. A number of surveying methods have been used to estimate pika density, but the reliability of these methods is not known. In addition, better population density methodologies allow for more reliable density estimates. We therefore compared the relationship among several commonly used methods of estimating pika

    更新日期:2020-05-29
  • Comments and News
    J. Mammal. (IF 1.891) Pub Date : 2020-05-19

    Please join us 5 to 9 June 2020 in Boulder, Colorado for the 100th Annual Meeting of the American Society of Mammalogists. The conference will be held on the campus of the University of Colorado, located at the foothills of the Rocky Mountains. Learn about the latest advances in the study of mammals and interact with researchers and educators specializing in these fascinating animals. Come celebrate

    更新日期:2020-05-19
  • Student Programs
    J. Mammal. (IF 1.891) Pub Date : 2020-05-19

    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

    更新日期:2020-05-19
  • A new method to estimate hair density of small mammal pelage
    J. Mammal. (IF 1.891) Pub Date : 2020-05-16
    Liang Yu Cui; Wei Liu; Yan Chun Xu; Shu Hui Yang; Thomas D Dahmer

    Hair density is the most important structural parameter contributing to insulation performance of mammalian pelage, and often is measured in ecophysiological, thermal biological, and evolutionary studies. To date, hair density has been measured using invasive methods on research objects; however, such methods remain challenging despite efforts to increase their ease of use. In this paper, we develop

    更新日期:2020-05-16
  • Brown bear den characteristics and selection in eastern Transylvania, Romania
    J. Mammal. (IF 1.891) Pub Date : 2020-05-16
    Ulysse Faure; Csaba Domokos; Agathe Leriche; Bogdan Cristescu

    Dens are important for species that need to survive and reproduce during harsh winters. Brown bears (Ursus arctos) in Romania, listed by the European Union as a population of concern, use dens for several months each year. To date, few quantitative assessments of denning habitat have been carried out for this population or others in Europe. In 2008–2013 and 2015–2017, we used local knowledge and telemetry

    更新日期:2020-05-16
  • Geographic variation in body size of five Australian marsupials supports Bergmann’s thermoregulation hypothesis
    J. Mammal. (IF 1.891) Pub Date : 2020-05-16
    Alyson M Stobo-Wilson; Teigan Cremona; Brett P Murphy; Susan M Carthew

    Despite a large body of research, little agreement has been reached on the ultimate driver(s) of geographic variation in body size (mass and/or length). Here we use skull length measurements (as a surrogate for body mass) from five Australian marsupial species to test the primary hypotheses of geographic variation in body size (relating to ambient temperature, productivity, and seasonality). We used

    更新日期:2020-05-16
  • Changes in aboveground locomotion of a scansorial opossum associated to habitat fragmentation
    J. Mammal. (IF 1.891) Pub Date : 2020-05-16
    Ana Cláudia Delciellos; Suzy Emidio Ribeiro; Jayme Augusto Prevedello; Marcus Vinícius Vieira

    Habitat fragmentation may affect animal movement patterns due to changes in intra- and interspecific interactions as well as in habitat quality and structure. Although the effects of habitat fragmentation on terrestrial movements are relatively well-known, it is unclear whether and how they affect aboveground locomotion of individuals. We compared aboveground locomotion of a Neotropical small mammal

    更新日期:2020-05-16
  • Editor’s choice
    J. Mammal. (IF 1.891) Pub Date : 2020-05-15
    Luis A Ruedas

    On p. 331 of this issue, Tamás Görföl and colleagues, under the direction of Gabor Csorba (Hungarian Natural History Museum), describe a new genus of vespertilionid bat. Is this noteworthy? Of course. But how much so? One way of answering these questions is to examine past trends, as may be detailed in taxonomic compendia, to assess present patterns and potential future progress in illuminating taxonomic

    更新日期:2020-05-15
  • Obituary: Barbara Hibbs Blake (1937–2019)
    J. Mammal. (IF 1.891) Pub Date : 2020-05-15
    Alicia V Linzey; Virginia Hayssen

    On 18 August 2019, the American Society of Mammalogists (ASM) lost part of its history when Barbara Hibbs Blake (Fig. 1) died after a series of strokes that started only days after the 2019 annual ASM meeting. Barbara was born on 6 August 1937 in Roseburg, Oregon and grew up in Portland. Although her father was Gordon Hibbs, she was raised by her mother Marybelle and her stepfather Lawrence Ramsby

    更新日期:2020-05-15
  • Books Received
    J. Mammal. (IF 1.891) Pub Date : 2020-05-15

    Bahr, J. 2018. The red squirrel: A short guide to its behavior and ecology. Bookbaby. Pennsauken, New Jersey, USA. ISBN: 978-1-54395-745-7, 103 pp (paperback). $24.95.

    更新日期:2020-05-15
  • Shape disparity in the blade-like premolars of multituberculate mammals: functional constraints and the evolution of herbivory
    J. Mammal. (IF 1.891) Pub Date : 2020-05-05
    Lucas N Weaver; Gregory P Wilson

    Cimolodontan multituberculates were a diverse and long-lived group of mammals characterized by large, blade-like lower fourth premolars (p4). Blade-like (plagiaulacoid) dentitions have evolved numerous times in distantly related mammalian lineages. Here we investigate how p4-shape disparity changed through time in the Cimolodonta. We address two hypotheses: (H1) blade-like dentitions constrain the

    更新日期:2020-05-05
  • In Memoriam: Galen Rathbun (1944–2019)
    J. Mammal. (IF 1.891) Pub Date : 2020-02-21
    David O Ribble; Lynn Rathbun; Thomas T Struhsaker; Peter M Waser; Jim Allaway

    Galen B. Rathbun died peacefully on 13 April 2019 at his home in Cambria, California, after a brief struggle with the return of a melanoma that had been removed 6 years earlier. Galen was born on 24 June 1944 and grew up in Woodside, California. His father, of English heritage, was an electrical and mechanical engineer who worked for Westinghouse, and subsequently founded his own company, Bearing Engineers

    更新日期:2020-04-17
  • Comments and News
    J. Mammal. (IF 1.891) Pub Date : 2020-02-21

    Please join us 5 to 9 June 2020 in Boulder, Colorado for the 100th Annual Meeting of the American Society of Mammalogists. The conference will be held on the campus of the University of Colorado, located at the foothills of the Rocky Mountains. Learn about the latest advances in the study of mammals and interact with researchers and educators specializing in these fascinating animals. Come celebrate

    更新日期:2020-04-17
  • Editors choice
    J. Mammal. (IF 1.891) Pub Date : 2020-02-21
    Luis A Ruedas

    The concept of subspecies has had a tortured history both in theory and practice. Linnaeus (1758) is considered the starting point of modern taxonomy. In his Systema Naturae, the taxonomic categories he introduced were Class, Order, Genus, Species, and Variety. Undefined, it is only by example that the Linnean meaning of variety can be gleaned: Linnaeus used it sparingly, under Homo sapiens, with varieties

    更新日期:2020-04-17
  • Books Received
    J. Mammal. (IF 1.891) Pub Date : 2020-02-21

    Persons wishing to review books listed above should contact: Matina Kalcounis-Rueppell, Faculty of Science, 6-188 CCIS, University of Alberta, Edmonton, Alberta T6G 2E1, Canada; e-mail: kalcounis.rueppell@ualberta.ca

    更新日期:2020-04-17
  • Student Programs
    J. Mammal. (IF 1.891) Pub Date : 2020-02-21

    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

    更新日期:2020-04-17
  • A message from the ASM Publications Director
    J. Mammal. (IF 1.891) Pub Date : 2020-02-21
    Paul Stapp

    As we close out the Centennial year of the American Society of Mammalogists (ASM), I want to thank our authors from around the world for their outstanding contributions, particularly those who wrote review papers for the 100th anniversary issue (volume 100, issue 3) of the Journal of Mammalogy published last June. The success of that memorable compilation is largely due to the months of work behind-the-scenes

    更新日期:2020-04-17
  • On the landscape of fear: shelters affect foraging by dunnarts (Marsupialia, Sminthopsis spp.) in a sandridge desert environment
    J. Mammal. (IF 1.891) Pub Date : 2020-02-15
    Sonny S Bleicher; Christopher R Dickman

    Disturbances such as fire reduce the structural complexity of terrestrial habitats, increasing the risk of predation for small prey species. The postfire effect of predation has especially deleterious effects in Australian habitats owing to the presence of invasive mammalian predators, the red fox (Vulpes vulpes) and feral cat (Felis catus), that rapidly exploit burned habitats. Here, we investigated

    更新日期:2020-04-17
  • What factors predict path tortuosity of Great Basin pocket mice in shrub-steppe habitat invaded by cheatgrass?
    J. Mammal. (IF 1.891) Pub Date : 2020-01-30
    Natalie C Melaschenko; Karen E Hodges

    Foraging animals choose habitats based on characteristics that often cannot be satisfied simultaneously, such as easy mobility, abundant or high-quality foods, and safety from predators. Invasive plants may alter habitat structure and provide novel foods; thus, measuring how animals forage in invaded landscapes offers insights into these new ecological relationships. We examined the movements of Great

    更新日期:2020-04-17
  • History of the publications of the American Society of Mammalogists
    J. Mammal. (IF 1.891) Pub Date : 2020-01-26
    Hugh H Genoways; Suzanne B McLaren; Robert M Timm

    Four series of publications have been produced in the 100-year history of the American Society of Mammalogist—Journal of Mammalogy [hereafter Journal or JM], Monographs, Mammalian Species, and the Special Publication series (Fig. 1—Verts and Birney 1994). The Journal of Mammalogy has been the flagship of the Society’s publications and as such, it is the only series to continue throughout its history

    更新日期:2020-04-17
  • Corrigendum to: Virginia opossum distributions are influenced by human-modified landscapes and water availability in tallgrass prairies
    J. Mammal. (IF 1.891) Pub Date : 2020-01-23
    Kyle R Wait; Adam A Ahlers

    In the first publication of this article, Figure 3 incorrectly reported an increase in probability of Virginia opossum (Didelphis virginiana) site colonization as distance to water increased. This has since been replaced with a corrected figure showing a decrease in site colonization probability as distance to water increases. The authors regret this error.

    更新日期:2020-04-17
  • Local habitat specialization as an evolutionary response to interspecific competition between two sympatric shrews
    J. Mammal. (IF 1.891) Pub Date : 2019-12-28
    Luis Biedma; Javier Calzada; José A Godoy; Jacinto Román

    Interspecific competition affects population dynamics, distributional ranges, and evolution of competing species. The competitive exclusion principle states that ecologically similar species cannot coexist unless they exhibit niche segregation. Herein, we assess whether niche segregation allows the coexistence of Crocidura russula and C. suaveolens in southwestern Iberia and whether segregation is

    更新日期:2020-04-17
  • Vegetal resources drive phylogenetic structure of phyllostomid bat assemblages in a Neotropical wetland
    J. Mammal. (IF 1.891) Pub Date : 2019-12-28
    Maurício Silveira; Walfrido Moraes Tomas; Clarissa de Araújo Martins; Erich Fischer

    The consumption of fruits and floral resources, as core or complementary food items, occurs in 75% of phyllostomid species. If phylogenetically related bat species have similar plant species in their diets, then it is expected that vegetal resources composition influences the phylogenetic structure of phyllostomid assemblages. We ask here if the phylogenetic structure of phyllostomid assemblages is

    更新日期:2020-04-17
  • Demographic consequences and characteristics of recent population mixing and colonization in Steller sea lions, Eumetopias jubatus
    J. Mammal. (IF 1.891) Pub Date : 2019-12-28
    Kelly K Hastings; Michael J Rehberg; Gregory M O’corry-Crowe; Grey W Pendleton; Lauri A Jemison; Thomas S Gelatt

    Steller sea lions (Eumetopias jubatus) are composed of two genetically distinct metapopulations (an increasing “eastern” and a reduced and endangered “western” population, or stock for management purposes in U.S. waters) that are only recently mixing at new rookeries in northern Southeast Alaska, east of the current stock boundary. We used mark-recapture models and 18 years of resighting data of over

    更新日期:2020-04-17
  • Spatiotemporal dynamics in vital rates of Humboldt’s flying squirrels and Townsend’s chipmunks in a late-successional forest
    J. Mammal. (IF 1.891) Pub Date : 2019-12-28
    Matt Weldy; Clinton W Epps; Damon B Lesmeister; Tom Manning; Eric D Forsman

    Knowledge of the spatiotemporal variability of abundance and vital rates is essential to the conservation of wildlife populations. In Pacific Northwest forests, previous small mammal research has focused on estimating abundance; few studies have focused on vital rates. We used robust design temporal symmetry models and live-trapping data collected 2011–2016 at nine sites to estimate apparent annual

    更新日期:2020-04-17
  • A precarious future for distinctive peripheral populations of meadow voles (Microtus pennsylvanicus)
    J. Mammal. (IF 1.891) Pub Date : 2019-12-28
    Donavan J Jackson; Joseph A Cook

    Conservation efforts rely on robust taxonomic assessments that should be based on critical assessment of interspecific boundaries, infraspecific variation, and potentially distinctive peripheral populations. The meadow vole (Microtus pennsylvanicus) is widely distributed across North America, including 28 morphologically defined subspecies and numerous isolated populations. Because some subspecies

    更新日期:2020-04-17
  • Traveling to thermal refuges during stressful temperatures leads to foraging constraints in a central-place forager
    J. Mammal. (IF 1.891) Pub Date : 2019-12-13
    Catherine G Haase; Robert J Fletcher; Daniel H Slone; James P Reid; Susan M Butler

    Central-place foragers can be constrained by the distance between habitats. When an organism relies on a central place for thermal refuge, the distance to food resources can potentially constrain foraging behavior. We investigated the effect of distance between thermal refuges and forage patches of the cold-intolerant marine mammal, the Florida manatee (Trichechus manatus latirostris), on foraging

    更新日期:2020-04-17
  • Rates of increase in gray seal (Halichoerus grypus atlantica) pupping at recolonized sites in the United States, 1988-2019.
    J. Mammal. (IF 1.891) Pub Date : 2019-12-13
    Stephanie A Wood,Kimberly T Murray,Elizabeth Josephson,James Gilbert

    Gray seals were historically distributed along the northeastern coast of the United States, but bounties and lack of protection reduced numbers and they were rarely observed for most of the 20th century. Once protections were enacted, the population started to rebound. Here, we describe the recolonization and recovery of gray seals in the United States, focusing on the re-establishment of pupping sites

    更新日期:2020-04-17
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