4,172 research outputs found
Special Publication (J.L.B. Smith Institute of Ichthyology) no.31
No full textOnline version of original print edition of the Special Publication of the J.L.B. Smith Institute of Ichthyology; No. 31Reports of triacanthodid fishes from the Indian Ocean published since the revision of the family by Tyler (.1968) are reviewed, and new records are added from off the east coast of Africa. These new records are based mostly on specimens recently collected by the R/V Fridtjof Nansen off Kenya (including new western Indian Ocean records of Halimochirurgus alcocki and of Bathyphylax bombifrons), as well as on some older materials from the J.L.B. Smith Institute of Ichthyology and the South African Museum. Eight species of triacanthodids known from off east Africa are discussed briefly, with special attention given to Bathyphylax bombifrons and B. omen, previously known only from holotypes, for which additional specimens are now available. Seven species are illustrated with photographs
AN ECOLOGICAL SURVEY OF EAST TEXAS SALAMANDERS ACROSS THE CAMP TYLER OUTDOOR FIELD SCHOOL IN SMITH COUNTY, TEXAS
No full textAmphibians are a unique class of organisms with a very long and storied evolutionary history of survival. Many modern amphibian clades occupy several vital ecological roles within their native freshwater environments. One of these roles, typically includes functioning as an ecological indicator species, whereby the presence of stable and diverse populations of many amphibian species, including salamanders, within a freshwater ecosystem have long been considered ecological indicators of good habitat quality and stable ecosystem health. Similarly, salamanders also function as important members of their local food webs and act as valuable mediators of complex trophic hierarchies to facilitate nutrient cycling between trophic levels throughout their equally complex life histories.
However, countless amphibians today are experiencing significant population declines – with many sensitive and endemic species currently facing the imminent threat of widespread extinction events that are primarily driven by anthropogenic activities. Concerningly, this could also spell disaster for numerous other clades and communities within these same freshwater ecosystems. These changes in amphibian distribution and diversity are only one small component in many broad scale declines in global biodiversity that have been recognized in recent decades. These collective declines have been described as a “sixth mass extinction.” Because of their status as ecological indicator species, the widespread reduction in many amphibian communities may also serve as a harbinger of further biological crises in the near future.
As a result, an updated record of sensitive amphibian species, especially salamanders, needs to be collected and compiled for use in assessing, tracking, and maintaining the health and well-being of many vital freshwater ecosystems. Here, a field survey of several East Texas salamander species was conducted from October of 2022 through April of 2023 – during their peak activity season – to create an updated inventory of historic and anecdotal salamander populations previously reported at the Camp Tyler Outdoor School, a local non-profit field school for grades K-12, located in Smith County, Texas. All three target salamander species were observed and identified during this period, although current findings seem to indicate that some these animals, especially the previously documented population of Western lesser sirens (Siren intermedia nettingi) may have experienced significant population declines since they were last surveyed. This is likely the result of a variety of ecological factors that have changed over time, including an increased anthropogenic presence within the area, land use changes, possible degradations in water and habitat quality, changing climatic conditions, and out competition with more tolerant clades in their aquatic environment
Tinnitus treatment: clinical protocols/ [edited by] Richard S. Tyler, Ann Perreau
No full textIncludes bibliographical references and index"Since publication of the first edition in 2005, new developments have impacted the treatment paradigm for tinnitus, such as sensory meditation and mindfulness. Tinnitus Treatment: Clinical Protocols, Second Edition, by world-renowned tinnitus experts and distinguished authors Richard S. Tyler and Ann Perreau provides comprehensive background information, up-to-date strategies, essential tools, and online supplementary materials grounded in years of clinical experience and research. It fills a gap in graduate education and available materials to empower audiologists to effectively treat patients suffering from bothersome to severely debilitating symptoms associated with tinnitus or hyperacusis"--Neurophysiological Models, Psychological Models, and Treatments for Tinnitus / Phillip E. Gander and Richard S. Tyler -- Treating Tinnitus in Patients with Otologic Conditions / David M. Baguley and Manohar L. Bance -- Internet-Delivered Guided Self-Help Treatments for Tinnitus / Gerhard Andersson and Eldre Beukes -- Tinnitus Activities Treatment / Ann Perreau, Richard S. Tyler, Patricia C. Mancini, and Shelley A. Witt -- Three-Track Tinnitus Protocol: Counseling Emphasizing the Patient, the Clinician, and the Alliance / Anne-Mette Mohr -- The Psychological Management of Tinnitus-Related Insomnia / Laurence McKenna and Elizabeth Marks -- Optimizing Hearing Aid Fittings for Tinnitus Management / Grant D. Searchfield and Alice H. Smith -- Combining Sound Therapy with Amplification / Grant D. Searchfield, Mithila Durai, and Tania Linford -- The Clinical Relevance of Apps for Tinnitus / Ann Perreau, Elizabeth Fetscher, and Michael Piskosz -- Distractions, Relaxation, and Peace with Tinnitus: Guided Imagery, Meditation, Mindfulness, and More / Ann Perreau, Courtney Baker, and Richard S. Tyler -- Tinnitus in Children / Mohamed Salah Elgandy and Claudia Coelho -- Measuring Tinnitus and Reactions to Tinnitus / Ann Perreau, Patricia C. Mancini, and Richard S. Tyler -- Hyperacusis / Richard S. Tyler, Ann Perreau, and Patricia C. Mancini -- Navigating Future Directions in Tinnitus Treatment / Fatima T. Husain -- Establishing a Tinnitus and Hyperacusis Clinic / Patricia C. Mancini, Shelley A. Witt, Richard S. Tyler, and A. Perreau1 online resource (xvii, 221 pages
Ancient DNA and the rewriting of human history: Be sparing with Occam's razor
No full textAncient DNA research is revealing a human history far more complex than that inferred from parsimonious models based on modern DNA. Here, we review some of the key events in the peopling of the world in the light of the findings of work on ancient DNA
Sexual biochemistry in the deep sea – the link between phytoplankton and abyssal holothurians
No full textHolothurians play an important role in carbon cycling. They dominate the abyssal oceanic megabenthos, reworking large amounts of organic matter. Holothurians require essential organic nutrients, such as carotenoids for their reproduction. Enhanced carotenoid concentration in the ovaries of echinoderms increases reproductive output and larval survival. Carotenoids cannot be synthesised de novo by holothurians, only by phytoplankton. To examine the link between diet and reproduction in deep-sea holothurians, the pigment biochemistry of holothurians, sediment and particulate organic matter from three abyssal sites as investigated. A temporal comparison at the Porcupine Abyssal Plain (PAP), NE Atlantic, has shown 1) the supply of organic material (OM) can affect the diet of holothurians, depending on their feeding adaptations and 2) holothurian reproductive biochemistry can be affected by compositional differences in the OM reaching the seafloor, although the extent of this influence appears to differ between species. Two abyssal sites around the Crozet Islands, Southern Ocean, were investigated to compare contrasting OM supply on the diet and reproductive biochemistry of holothurians. The sites are only 460 km apart, with no topographic boundary to separate them. However, they are subject to differing overlying primary productivity regimes and therefore biochemical differences can be ascribed to the composition and amount of organic matter reaching the sea floor at each site. The results showed that 1) the quantity of OM reaching the seafloor at each site differed, mirroring the overlying primary productivity regimes. This was also reflected in the diet of some holothurian species, depending on their ability to take advantage of the fresh material. 2) The reproductive biochemistry of the holothurians sampled at both sites showed quantitative differences, mirroring the supply of OM to each benthic site.The present study has shown that changes in the composition and quantity of the supply of OM to the deep-sea floor can affect holothurian diet and ovarian biochemistry. This may lead to large community changes as seen at the PAP in the NE Atlantic, which alters the reworking rate of the sediment, ultimately affecting the sequestration of carbon
Wolves in rural agricultural areas of western North America: conflict and conservation
No full textNo abstract available for this chapte
Henry C. Smith letter to Warren G. Harding, March 6, 1920
No full textIn this letter dated March 6, 1920, editor and proprietor of The Gazette in Cleveland, Ohio, Henry C. Smith, writes to Senator Warren G. Harding, in regards to The Advocate, an African American newspaper in Cleveland. Smith states that Ralph Tyler, the Advocate's managing editor, is pushing for General Leonard Wood for the Republican nominee for president in his newspaper, and cites his disloyalty to Senator Joseph Benson Foraker, a major supporter of the African American community in Ohio. He suggests Harding respond to Tyler's Wood agenda so that he doesn't sway African American voters to support Wood in the upcoming election.
This letter is part of the Warren G. Harding Papers (MSS 345). This collection includes correspondence, business records, and other materials documenting Harding’s business career as owner and editor-in-chief of The Daily Marion Star, as well as the various stages of his political career. A significant portion of the collection, and what’s available on Ohio Memory, highlights his 1920 presidential campaign, spanning just before publicly announcing his candidacy to handily defeating Ohio Governor James M. Cox in the election. Correspondents include both Ohio and national businessmen, political figures, and ordinary citizens writing with questions, support, congratulatory notes, and campaign advice. Some of the most interesting insights into the tumultuous political climate in the U.S., the extreme factionalism within the Republican Party in Ohio, and Harding’s campaign strategies are described in letters between Harding and his campaign manager, Harry M. Daugherty. Some of the topics addressed include women’s suffrage, Prohibition, the League of Nations, African American representation and issues, and lingering peace negotiations following World War I
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