20 research outputs found
Review of \u3ci\u3eGrouse of the Plains and Mountains - The South Dakota Story,\u3c/i\u3e by Lester D. Flake, John W. Connelly, Thomas R. Kirschenmann, and Andrew J. Lindbloom.
Grouse are a fascinating group of birds that offer elaborate breeding displays for birders in the spring, provide sporting opportunities for hunters in the fall, and serve as indicators of grassland health. Though the authors claim that the book targets those who enjoy the outdoors, bird watching, and upland game bird hunting, there is ample reason for ecologists, ornithologists, and grouse researchers to reference this book as well. The book contains general information of interest to a broad audience, but often moves beyond the introductory information to greater detail. Many details are supported by peer-reviewed literature. This book strikes a pleasant balance between dry scientific literature and a coffee table book of intriguing photos. It remains informative while trading painfully formal language for the more conversational tone of popular literature. The book discusses the four native grouse species that occur in South Dakota: ruffed grouse, greater sage-grouse, greater prairie-chicken, and sharp-tailed grouse. The text is well organized into 13 chapters, followed by appendices and the literature cited. Chapters cover South Dakota\u27s grouse habitats, physical characteristics of the four species (including gender and age determination), behavior, population ecology, habitat use, monitoring, hunting, and habitat conservation
Pheasants of the World . . . Again
The newest edition of Johnsgard\u27s overview of the pheasants of the world is arranged in two parts, as was the first edition. Part One is entitled Comparative Biology and is divided into eight chapters: relationships and classification, hybridization and zoogeographic patterns, growth and behavioral development, general and social behavior, ecology and population biology, comparative mating systems and social signaling devices, reproductive biology, and aviculture and conservation. Part Two, Taxonomic Keys and Species Accounts, forms the bulk of the text. Part Two begins with keys to subfamilies, tribes, and the 16 genera. An account for each species follows the generic key. The species accounts include distributions of the subspecies (including range maps), measurements, narrative descriptions to aid in identification, ecology and general biology, reproduction, and a section on status and conservation outlook
Brood Break-up and Juvenile Dispersal of Lesser Prairie-chicken in Kansas
Natal dispersal is critical for genetic interchange between subpopulations of birds and little is known about the timing and extent of lesser prairiechicken (Tympanuchus pallidicinctus) dispersal movements. We monitored movements of 51 transmitter-equipped female lesser prairie-chicken known to have hatched a nest. Average minimum daily brood movements differed (t = -2.94, df = 829, P \u3c 0.01) between the early (273 m; 0 to 14 days post-hatch) and late (312 m; 15 to 60 days post-hatch) brood rearing periods. We captured 71 juvenile lesser prairie-chicken from 10 broods at 3 to 11 days post-hatch and marked them with passive integrated transponder (PIT) tags. We subsequently captured 41 chicks from 20 different broods and fitted them with necklace-style transmitters. Transmitter- equipped brood hens and individual chicks were monitored daily and the average date of brood break-up was September 13 (85 to 128 days post-hatch). Both males and females exhibited bimodal dispersal movements in the fall and spring. Autumn dispersal movements peaked between late October and early November for both sexes. Spring dispersal movement of males peaked during late February. Female dispersal movements in the spring peaked in late March and were much more extensive than fall dispersal movements. Natal dispersal distance for all marked males averaged 1.4 km (SE= 0.2, n = 9). The approximate dispersal distances of three transmitter-equipped females ranged from 1.5 to 26.3 km. Because of greater dispersal distances, females will contribute more to genetic exchanges between fragmented subpopulations. To ensure genetic connectivity, we recommend that a distance of less than 10 km be maintained between lesser prairie-chicken subpopulations through protection or establishment of suitable habitat
EFFECTS OF MANAGEMENT PRACTICES ON GRASSLAND BIRDS: LESSER PRAIRIE-CHICKEN
Information on the habitat requirements and effects of habitat management on grassland birds were summarized from information in more than 4,000 published and unpublished papers. A range map is provided to indicate the breeding distribution of Lesser Prairie-Chicken in the United States and southern Canada. Although birds frequently are observed outside the breeding range indicated, the maps are intended to show areas where managers might concentrate their attention. It may be ineffectual to manage habitat at a site for a species that rarely occurs in an area. The species account begins with a brief capsule statement, which provides the fundamental components or keys to management for the species. A section on breeding range outlines the current breeding distribution of the species in North America. The suitable habitat section describes the breeding habitat and occasionally microhabitat characteristics of the species, especially those habitats that occur in the Great Plains. Details on habitat and microhabitat requirements often provide clues to how a species will respond to a particular management practice. A table near the end of the account complements the section on suitable habitat, and lists the specific habitat characteristics for the species by individual studies. A special section on prey habitat is included for those predatory species that have more specific prey requirements. The area requirements section provides details on territory and home range sizes, minimum area requirements, and the effects of patch size, edges, and other landscape and habitat features on abundance and productivity. It may be futile to manage a small block of suitable habitat for a species that has minimum area requirements that are larger than the area being managed. The Brown-headed Cowbird (Molothrus ater) is an obligate brood parasite of many grassland birds. The section on cowbird brood parasitism summarizes rates of cowbird parasitism, host responses to parasitism, and factors that influence parasitism, such as nest concealment and host density. The impact of management depends, in part, upon a species’ nesting phenology and biology. The section on breeding-season phenology and site fidelity includes details on spring arrival and fall departure for migratory populations in the Great Plains, peak breeding periods, the tendency to renest after nest failure or success, and the propensity to return to a previous breeding site. The duration and timing of breeding varies among regions and years. Species’ response to management summarizes the current knowledge and major findings in the literature on the effects of different management practices on the species. The section on management recommendations complements the previous section and summarizes specific recommendations for habitat management provided in the literature. If management recommendations differ in different portions of the species’ breeding range, recommendations are given separately by region. The literature cited contains references to published and unpublished literature on the management effects and habitat requirements of the species. This section is not meant to be a complete bibliography; a searchable, annotated bibliography of published and unpublished papers dealing with habitat needs of grassland birds and their responses to habitat management is posted at the Web site mentioned below
Gene Expression Changes in the Prefrontal Cortex, Anterior Cingulate Cortex and Nucleus Accumbens of Mood Disorders Subjects That Committed Suicide
Suicidal behaviors are frequent in mood disorders patients but only a subset of them ever complete suicide. Understanding predisposing factors for suicidal behaviors in high risk populations is of major importance for the prevention and treatment of suicidal behaviors. The objective of this project was to investigate gene expression changes associated with suicide in brains of mood disorder patients by microarrays (Affymetrix HG-U133 Plus2.0) in the dorsolateral prefrontal cortex (DLPFC: 6 Non-suicides, 15 suicides), the anterior cingulate cortex (ACC: 6NS, 9S) and the nucleus accumbens (NAcc: 8NS, 13S). ANCOVA was used to control for age, gender, pH and RNA degradation, with P≤0.01 and fold change±1.25 as criteria for significance. Pathway analysis revealed serotonergic signaling alterations in the DLPFC and glucocorticoid signaling alterations in the ACC and NAcc. The gene with the lowest p-value in the DLPFC was the 5-HT2A gene, previously associated both with suicide and mood disorders. In the ACC 6 metallothionein genes were down-regulated in suicide (MT1E, MT1F, MT1G, MT1H, MT1X, MT2A) and three were down-regulated in the NAcc (MT1F, MT1G, MT1H). Differential expression of selected genes was confirmed by qPCR, we confirmed the 5-HT2A alterations and the global down-regulation of members of the metallothionein subfamilies MT 1 and 2 in suicide completers. MTs 1 and 2 are neuro-protective following stress and glucocorticoid stimulations, suggesting that in suicide victims neuroprotective response to stress and cortisol may be diminished. Our results thus suggest that suicide-specific expression changes in mood disorders involve both glucocorticoids regulated metallothioneins and serotonergic signaling in different regions of the brain
Molecular mechanisms of cell death: recommendations of the Nomenclature Committee on Cell Death 2018.
Over the past decade, the Nomenclature Committee on Cell Death (NCCD) has formulated guidelines for the definition and interpretation of cell death from morphological, biochemical, and functional perspectives. Since the field continues to expand and novel mechanisms that orchestrate multiple cell death pathways are unveiled, we propose an updated classification of cell death subroutines focusing on mechanistic and essential (as opposed to correlative and dispensable) aspects of the process. As we provide molecularly oriented definitions of terms including intrinsic apoptosis, extrinsic apoptosis, mitochondrial permeability transition (MPT)-driven necrosis, necroptosis, ferroptosis, pyroptosis, parthanatos, entotic cell death, NETotic cell death, lysosome-dependent cell death, autophagy-dependent cell death, immunogenic cell death, cellular senescence, and mitotic catastrophe, we discuss the utility of neologisms that refer to highly specialized instances of these processes. The mission of the NCCD is to provide a widely accepted nomenclature on cell death in support of the continued development of the field
Review of \u3ci\u3eGrouse of the Plains and Mountains - The South Dakota Story,\u3c/i\u3e by Lester D. Flake, John W. Connelly, Thomas R. Kirschenmann, and Andrew J. Lindbloom.
Grouse are a fascinating group of birds that offer elaborate breeding displays for birders in the spring, provide sporting opportunities for hunters in the fall, and serve as indicators of grassland health. Though the authors claim that the book targets those who enjoy the outdoors, bird watching, and upland game bird hunting, there is ample reason for ecologists, ornithologists, and grouse researchers to reference this book as well. The book contains general information of interest to a broad audience, but often moves beyond the introductory information to greater detail. Many details are supported by peer-reviewed literature. This book strikes a pleasant balance between dry scientific literature and a coffee table book of intriguing photos. It remains informative while trading painfully formal language for the more conversational tone of popular literature. The book discusses the four native grouse species that occur in South Dakota: ruffed grouse, greater sage-grouse, greater prairie-chicken, and sharp-tailed grouse. The text is well organized into 13 chapters, followed by appendices and the literature cited. Chapters cover South Dakota\u27s grouse habitats, physical characteristics of the four species (including gender and age determination), behavior, population ecology, habitat use, monitoring, hunting, and habitat conservation
Pheasants of the World . . . Again
The newest edition of Johnsgard\u27s overview of the pheasants of the world is arranged in two parts, as was the first edition. Part One is entitled Comparative Biology and is divided into eight chapters: relationships and classification, hybridization and zoogeographic patterns, growth and behavioral development, general and social behavior, ecology and population biology, comparative mating systems and social signaling devices, reproductive biology, and aviculture and conservation. Part Two, Taxonomic Keys and Species Accounts, forms the bulk of the text. Part Two begins with keys to subfamilies, tribes, and the 16 genera. An account for each species follows the generic key. The species accounts include distributions of the subspecies (including range maps), measurements, narrative descriptions to aid in identification, ecology and general biology, reproduction, and a section on status and conservation outlook
Guidelines for Managing Lesser Prairie-Chicken Populations and Their Habitats
Lesser prairie-chicken (Tympanuchus paidicinctus) populations have declined by \u3e90% since the 1800s. These declines have concerned both biologists and private conservation groups and led to a petition to list the lesser prairie-chicken as threatened under the Endangered Species Act. Most of the land in the current range of the lesser prairie-chicken is privately owned, and declines have been primarily attributed to anthropogenic factors. Conversion of native rangeland to cropland and excessive grazing have been implicated as leading causes in the species\u27 decline. Periodic drought probably has exacerbated these problems. Little research on habitat requirements was conducted prior to 1970. Despite recent advances in the knowledge of lesser prairie-chicken ecology, no comprehensive guidelines for management of the species have been published. In these guide- lines, we provide a synopsis of our current knowledge of lesser prairie-chicken habitat requirements and suggest management strategies to monitor, maintain, and enhance lesser prairie-chicken populations