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Scale Sensillae of the File Snake (Serpentes: Acrochordidae) and Some Other Aquatic and Burrowing Snakes
SCALE SENSILLAE OF THE FILE SNAKE (SERPENTES: ACROCHORDIDAE) AND SOME OTHER AQUATIC AND BURROWING SNAKES by DAVID POVEL and JEROEN VAN DER KOOIJ (Section Dynamic Morphology,Institute of Evolutionaryand Ecological Sciences, Leiden University,P.O. Box 9516, 2300 RA Leiden, The Netherlands) ABSTRACT The acrochordid snakes are aquatic, living in environmentswith often a poor visibility. It therefore was investigatedhow these animals detect their prey. Two earlier studies of their scales revealed a rather complex scale organ, composedof hairlike protrusions and plate-like structures. However, no satisfactory explanation was given for the structures found, e.g., an undefined sensilla or a gland. Skin samples from various sites of the body of Acrochordus granulatus and A. javanicus were studied. Scanning electron microscopic pictures revealed that each scale of the head contains up to seven sensillae, and each of the keeled scales of the rest of the body has one. Also a modified Allochrome staining procedure on tissue samples was performed to detect glycogen, which is known to occur in discoidal nerve endings of tactile sense organs of reptiles. Light microscopicslides revealedglycogen particles in a small pillow-shaped area just below the hairlike protrusions of an organ. Moreover, small nerves were recognized near the same location. No indications were found for the scale organs to have a glandular function. Because of the reported reactions of a snake when it is touched by a fish, these scale sensilla are proposed to be very sensitivemechanoreceptors. Comparisons were made with the scale organs of snakes from various habitats, viz. the seasnake Lapemis hardwicki, and burrowing snakes such as Xenopeltis unicolor and Cylindrophisrufus. -
Other Contributions
Other Contributions NATURE NOTES Amphibia: Caudata Ambystoma ordinarium. Predation by a Black-necked Gartersnake (Thamnophis cyrtopsis). The Michoacán Stream Salamander (Ambystoma ordinarium) is a facultatively paedomorphic ambystomatid species. Paedomorphic adults and larvae are found in montane streams, while metamorphic adults are terrestrial, remaining near natal streams (Ruiz-Martínez et al., 2014). Streams inhabited by this species are immersed in pine, pine-oak, and fir for- ests in the central part of the Trans-Mexican Volcanic Belt (Luna-Vega et al., 2007). All known localities where A. ordinarium has been recorded are situated between the vicinity of Lake Patzcuaro in the north-central portion of the state of Michoacan and Tianguistenco in the western part of the state of México (Ruiz-Martínez et al., 2014). This species is considered Endangered by the IUCN (IUCN, 2015), is protected by the government of Mexico, under the category Pr (special protection) (AmphibiaWeb; accessed 1April 2016), and Wilson et al. (2013) scored it at the upper end of the medium vulnerability level. Data available on the life history and biology of A. ordinarium is restricted to the species description (Taylor, 1940), distribution (Shaffer, 1984; Anderson and Worthington, 1971), diet composition (Alvarado-Díaz et al., 2002), phylogeny (Weisrock et al., 2006) and the effect of habitat quality on diet diversity (Ruiz-Martínez et al., 2014). We did not find predation records on this species in the literature, and in this note we present information on a predation attack on an adult neotenic A. ordinarium by a Thamnophis cyrtopsis. On 13 July 2010 at 1300 h, while conducting an ecological study of A. -
Richard Bradley's Illicit Excursion Into Medical Practice in 1714
CORE Metadata, citation and similar papers at core.ac.uk Provided by PubMed Central RICHARD BRADLEY'S ILLICIT EXCURSION INTO MEDICAL PRACTICE IN 1714 by FRANK N. EGERTON III* INTRODUCTION The development of professional ethics, standards, practices, and safeguards for the physician in relation to society is as continuous a process as is the development of medicine itself. The Hippocratic Oath attests to the antiquity of the physician's concern for a responsible code of conduct, as the Hammurabi Code equally attests to the antiquity of society's demand that physicians bear the responsibility of reliable practice." The issues involved in medical ethics and standards will never be fully resolved as long as either medicine or society continue to change, and there is no prospect of either becoming static. Two contemporary illustrations will show the on-going nature of the problems of medical ethics. The first is a question currently receiving international attention and publicity: what safeguards are necessary before a person is declared dead enough for his organs to be transplanted into a living patient? The other illustration does not presently, as far as I know, arouse much concern among physicians: that medical students carry out some aspects of medical practice on charity wards without the patients being informed that these men are as yet still students. Both illustrations indicate, I think, that medical ethics and standards should be judged within their context. If and when a consensus is reached on the criteria of absolute death, the ethical dilemma will certainly be reduced, if not entirely resolved. If and when there is a favourable physician-patient ratio throughout the world and the economics of medical care cease to be a serious problem, then the relationship of medical students to charity patients may become subject to new consideration. -
Snakes of the Siwalik Group (Miocene of Pakistan): Systematics and Relationship to Environmental Change
Palaeontologia Electronica http://palaeo-electronica.org SNAKES OF THE SIWALIK GROUP (MIOCENE OF PAKISTAN): SYSTEMATICS AND RELATIONSHIP TO ENVIRONMENTAL CHANGE Jason J. Head ABSTRACT The lower and middle Siwalik Group of the Potwar Plateau, Pakistan (Miocene, approximately 18 to 3.5 Ma) is a continuous fluvial sequence that preserves a dense fossil record of snakes. The record consists of approximately 1,500 vertebrae derived from surface-collection and screen-washing of bulk matrix. This record represents 12 identifiable taxa and morphotypes, including Python sp., Acrochordus dehmi, Ganso- phis potwarensis gen. et sp. nov., Bungarus sp., Chotaophis padhriensis, gen. et sp. nov., and Sivaophis downsi gen. et sp. nov. The record is dominated by Acrochordus dehmi, a fully-aquatic taxon, but diversity increases among terrestrial and semi-aquatic taxa beginning at approximately 10 Ma, roughly coeval with proxy data indicating the inception of the Asian monsoons and increasing seasonality on the Potwar Plateau. Taxonomic differences between the Siwalik Group and coeval European faunas indi- cate that South Asia was a distinct biogeographic theater from Europe by the middle Miocene. Differences between the Siwalik Group and extant snake faunas indicate sig- nificant environmental changes on the Plateau after the last fossil snake occurrences in the Siwalik section. Jason J. Head. Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, P.O. Box 37012, Washington, DC 20013-7012, USA. [email protected] School of Biological Sciences, Queen Mary, University of London, London, E1 4NS, United Kingdom. KEY WORDS: Snakes, faunal change, Siwalik Group, Miocene, Acrochordus. PE Article Number: 8.1.18A Copyright: Society of Vertebrate Paleontology May 2005 Submission: 3 August 2004. -
Contributions to the Natural History and Distribution of Dasypeltis
ZOBODAT - www.zobodat.at Zoologisch-Botanische Datenbank/Zoological-Botanical Database Digitale Literatur/Digital Literature Zeitschrift/Journal: Herpetozoa Jahr/Year: 2017 Band/Volume: 30_1_2 Autor(en)/Author(s): Jimenez-Robles Octavio, Leon Raul, Soto Cardenas Manuel, Rebollo Baudilio, Martinez Gabriel Artikel/Article: Contributions to the natural history and distribution of Dasypeltis sahelensis TRAPE & MANÉ, 2006, in Morocco 80-86 All_Short_Notes_(Seiten 59-112):SHORT_NOTE.qxd 07.08.2017 19:05 Seite 22 80 SHORT NOTE HERPETOZOA 30 (1/2) Wien, 30. Juli 2017 SHORT NOTE Ministry of Enviroment), pp. 14, 214. BARAN , İ. & quences.- Molecular Ecology, Oxford; 14: 2433-2443. IlgAZ , Ç. & A vcI , A. & K uMluTAş , Y. & OlguN , K. ScHREIBER , E. (1912): Herpetologia Europaea. Eine (2012): Türkiye amfibi ve sürüngenleri [Amphibians systematische Bearbeitung der Amphibien und and reptiles of Turkey]. Ankara (TÜBİTAK Popüler Reptilien welche bisher in Europa aufgefunden sind. Bilim Kitapları), pp. 208. BARAN , İ. & Y IlMAZ , İ. & 2nd edition. Jena (gustav Fischer), pp. X, 960. KETE , R. & D uR Muş , H. (1992) : Batı ve orta Karadeniz SINDAcO , R. & J EREMčENKO , v. K. (2008): The reptiles Bölgesinin herpetofaunası.- Turkish Journal of Zoology, of the western Palearctic. 1. Annotated checklist and Ankara; 16: 275-288. BAşOğlu , M. & B ARAN , İ. distributional atlas of the turtles, crocodiles, amphis - (1977): Türkiye sürüngenleri. Kısım I. Kaplumbağa ve baenians and lizards of Europe, North Africa, Middle kertenkeleler.- Ege Üniversitesi Fen Fakültesi Kitaplar East and central Asia.latina (Edizioni Belvedere), pp. Serisi, İzmir; 76: vI, 272. BERgMANN , J. & N ORSTRöM , 579. SINDAcO , R. & v ENcHI , A. & c ARPANETO , g. M. M. (1990): Neues über Podarcis taurica (PAllAS , 1814) & B OlOgNA , M. -
Forest Stewardship Workshop
Aquatic Invasives Workshop Presented by the: Central Florida Cooperative Invasive Species Management Area (CISMA), East Central Florida CISMA & Florida Forest Stewardship Program May 13, 2016; 8:30 am – 2:30 pm ET UF/IFAS Orange County Extension Office Many exotic plants are invasive weeds that form expanding populations on our landscape and waterways, making management a challenge. Some exotic animals have also become a problem for resource managers. The rapid and effective dispersal characteristics of these invaders make them extremely difficult to eliminate. This workshop will describe some of the more common and troublesome aquatic invasive exotic species in central Florida, current methods being used to manage them and opportunities to partner and get assistance. Tentative Agenda: 8:30 am Sign-in, meet & greet (finish refreshments before entering meeting room) 8:50 Welcome & introduction, Sherry Williams, Seminole County Natural Lands Program 9:00 Aquatic herbicides and application techniques, Dr. Stephen Enloe, UF/IFAS Center for Aquatic and Invasive Plants 9:50 Mosquito biology and disease, Ed Northey, Volusia County Mosquito Control 10:15 Algae, Michael Shaner, SePRO 10:40 Networking break 11:00 Ludwigia plant complex, Kelli Gladding, SePRO 11:25 Introduced aquatic herpetofauna in Florida, Dr. Steve Johnson, UF/IFAS Dept. of Wildlife Ecology and Conservation 11:50 Lunch 1:00 pm Hands-on plant and animal ID round-robin, all staff 2:30 Evaluation, CEUs, adjourn Funding for this workshop is provided by the USDA Forest Service through the Florida Department of Agriculture and Consumer Services Florida Forest Service, the Florida Sustainable Forestry Initiative Implementation Committee, Applied Aquatic Management, Inc., Aquatic Vegetation Control, Inc., Dow Chemical, Earth Balance, Florida’s Aquatic Preserves, Modica & Associates, Florida Aquatic Plant Management Society, and SePro. -
Kingsnakems RWM
Godley et al. !1 Ecology of the Eastern Kingsnake (Lampropeltis getula) at Rainey Slough, Florida: A Vanished Eden J. STEVE GODLEY1, BRIAN J. HALSTEAD", AND ROY W. MCDIARMID# $Cardno, 3905 Crescent Park Drive, Riverview, FL, 33578, USA "U.S. Geological Survey, Western Ecological Research Center, Dixon Field Station, 800 Business Park Drive, Suite D, Dixon, CA, 95620, USA #U.S. Geological Survey, Patuxent Wildlife Research Center, Smithsonian Institution, MRC 111 PO Box 37012, Washington, DC, 20013, USA CORRESPONDENCE: email, [email protected] RRH: ECOLOGY OF KINGSNAKES !1 Godley et al. !2 ABSTRACT: The Eastern Kingsnake (Lampropeltis getula) is an important component and predator in herpetofaunal communities, but many of its populations have declined precipitously in the last few decades, particularly in the southeastern USA. Here, we describe an intensive mark–recapture study of L. getula conducted from 1974–1978 in a canal bank–water hyacinth community at Rainey Slough in southern Florida, where we also quantitatively sampled their primary prey, other species of snakes. The best-fit model for L. getula was an open population with a high daily capture probability (0.189) and low apparent annual survival (0.128) that were offset by high recruitment and positive population growth rates, suggesting a high turnover rate in the population. Mean population size varied annually from 11–19 adult kingsnakes with a total predator biomass of 8.20–14.16 kg in each study year. At this site kingsnakes were susceptible to capture mostly in winter and spring, were diurnal, used rodent (Sigmodon hispidus) burrows on canal banks as nocturnal retreats, and emerged from burrows on 0.13–0.26 of the sampling days. -
MCS Herpetofauna Checklist
MATOBO CONSERVATION SOCIETY CHECKLIST FOR THE HERPETOFAUNA OF THE MATOBO HILLS APPRECIATION This material was prepared by the MATOBO CONSERVATION SOCIETY from chapter 12 of the book “THE NATURAL HISTORY OF THE MATOBO HILLS” ISBN 978-0-7974-9815-0 with the approval of the NATURAL HISTORY MUSEUM OF ZIMBABWE The Matobo Conservation Society, a registered Welfare organisation, is committed to the conservation, appreciation and sustainable use of the natural and cultural resources within the Matobo Hills region. For more information (a) on this checklist and (b) the book “THE NATURAL HISTORY OF THE MATOBO HILLS”, write to: The Matobo Conservation Society, PO Box FM 648, Famona, Bulawayo or email [email protected] INTRODUCTION Compiled by Dr Don Broadley Sketches were done by Jenny Whalley The reptiles and amphibians together comprise the herpetofauna of the Matobo hills. It has a fairly rich species richness, consisting of 70 reptile and 28 amphibian species. Not only do these comprise a diverse assemblage, but they occur at very high densities compared to mammals. The herpetofauna of woodland and savanna areas of the Matobo includes many savanna species which are widely distributed across similar habitats of south-central Africa. With a few exceptions, most amphibians are seasonally dependant on surface water and the aquatic habitats in which it is localised. The permanent water bodies have a few characteristic reptile inhabitants. The serrated hinged terrapin is found in such dams and permanent streams, and is replaced in temporary pans by the helmeted terrapin. The water monitor is most plentiful around permanent water bodies, where it feeds largely on crabs and mussels. -
Volume 4 Issue 1B
Captive & Field Herpetology Volume 4 Issue 1 2020 Volume 4 Issue 1 2020 ISSN - 2515-5725 Published by Captive & Field Herpetology Captive & Field Herpetology Volume 4 Issue1 2020 The Captive and Field Herpetological journal is an open access peer-reviewed online journal which aims to better understand herpetology by publishing observational notes both in and ex-situ. Natural history notes, breeding observations, husbandry notes and literature reviews are all examples of the articles featured within C&F Herpetological journals. Each issue will feature literature or book reviews in an effort to resurface past literature and ignite new research ideas. For upcoming issues we are particularly interested in [but also accept other] articles demonstrating: • Conflict and interactions between herpetofauna and humans, specifically venomous snakes • Herpetofauna behaviour in human-disturbed habitats • Unusual behaviour of captive animals • Predator - prey interactions • Species range expansions • Species documented in new locations • Field reports • Literature reviews of books and scientific literature For submission guidelines visit: www.captiveandfieldherpetology.com Or contact us via: [email protected] Front cover image: Timon lepidus, Portugal 2019, John Benjamin Owens Captive & Field Herpetology Volume 4 Issue1 2020 Editorial Team Editor John Benjamin Owens Bangor University [email protected] [email protected] Reviewers Dr James Hicks Berkshire College of Agriculture [email protected] JP Dunbar -
Touching Anatomy: on the Handling of Preparations in the Anatomical Cabinets of Frederik Ruysch (1638E1731)
University of Groningen Touching Anatomy. Knoeff, Rina Published in: Studies in History and Philosophy of Biological and Biomedical Sciences IMPORTANT NOTE: You are advised to consult the publisher's version (publisher's PDF) if you wish to cite from it. Please check the document version below. Document Version Publisher's PDF, also known as Version of record Publication date: 2015 Link to publication in University of Groningen/UMCG research database Citation for published version (APA): Knoeff, R. (2015). Touching Anatomy. On the Handling of Anatomical Preparations in the Anatomical Cabinets of Frederik Ruysch (1638-1731). Studies in History and Philosophy of Biological and Biomedical Sciences, (1). Copyright Other than for strictly personal use, it is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license (like Creative Commons). The publication may also be distributed here under the terms of Article 25fa of the Dutch Copyright Act, indicated by the “Taverne” license. More information can be found on the University of Groningen website: https://www.rug.nl/library/open-access/self-archiving-pure/taverne- amendment. Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. -
Conservation of Herpetofauna in Bantimurung Bulusaraung National Park, South Sulawesi, Indonesia
CONSERVATION OF HERPETOFAUNA IN BANTIMURUNG BULUSARAUNG NATIONAL PARK, SOUTH SULAWESI, INDONESIA Final Report 2008 By: M. Irfansyah Lubis, Wempy Endarwin, Septiantina D. Riendriasari, Suwardiansah, Adininggar U. Ul-Hasanah, Feri Irawan, Hadijah Aziz K., and Akmal Malawi Departemen Konservasi Sumberdaya Hutan Fakultas Kehutanan Institut Pertanian Bogor Bogor Indonesia 16000 Tel : +62 – 251 – 621 947 Fax: +62 – 251 – 621 947 Email: [email protected] (team leader) Conservation of Herpetofauna in Bantimurung Bulusaraung National Park, South Sulawesi, Indonesia Executive Summary Sulawesi is an island with complex geological and geographical history, thus resulting in a complex array in biodiversity. Bantimurung Bulusaraung National Park (BabulNP) was gazetted in 2004 to protect the region’s biodiversity and karst ecosystem. However, the park’s herpetofauna is almost unknown. This project consists of three programs: herpetofauna survey in BabulNP, herpetofauna conservation education to local schools, and herpetofauna training for locals and was conducted from July to September 2007. Based on the survey conducted in six sites in the park, we recorded 12 amphibian and 25 reptile species. Five of those species (Bufo celebensis, Rana celebensis, Rhacophorus monticola, Sphenomorphus tropidonotus, and Calamaria muelleri) are endemic to Sulawesi. Two species of the genus Oreophryne are still unidentified. We visited six schools around the park for our herpetofauna conservation education program. The Herpetofauna Observation Training was held over four days with 17 participants from BabulNP staff, local NGOs, school teachers, and Hasanuddin University students. i Conservation of Herpetofauna in Bantimurung Bulusaraung National Park, South Sulawesi, Indonesia Acknowledgements This project would not have been possible without the contribution of many persons. We would like to express our gratitude to BP Conservation Leadership Programme for providing funding. -
THE ORIGIN and EVOLUTION of SNAKE EYES Dissertation
CONQUERING THE COLD SHUDDER: THE ORIGIN AND EVOLUTION OF SNAKE EYES Dissertation Presented in Partial Fulfillment for the Requirements for the Degree of Doctor of Philosophy in the Graduate School of The Ohio State University By Christopher L. Caprette, B.S., M.S. **** The Ohio State University 2005 Dissertation Committee: Thomas E. Hetherington, Advisor Approved by Jerry F. Downhower David L. Stetson Advisor The graduate program in Evolution, John W. Wenzel Ecology, and Organismal Biology ABSTRACT I investigated the ecological origin and diversity of snakes by examining one complex structure, the eye. First, using light and transmission electron microscopy, I contrasted the anatomy of the eyes of diurnal northern pine snakes and nocturnal brown treesnakes. While brown treesnakes have eyes of similar size for their snout-vent length as northern pine snakes, their lenses are an average of 27% larger (Mann-Whitney U test, p = 0.042). Based upon the differences in the size and position of the lens relative to the retina in these two species, I estimate that the image projected will be smaller and brighter for brown treesnakes. Northern pine snakes have a simplex, all-cone retina, in keeping with a primarily diurnal animal, while brown treesnake retinas have mostly rods with a few, scattered cones. I found microdroplets in the cone ellipsoids of northern pine snakes. In pine snakes, these droplets act as light guides. I also found microdroplets in brown treesnake rods, although these were less densely distributed and their function is unknown. Based upon the density of photoreceptors and neural layers in their retinas, and the predicted image size, brown treesnakes probably have the same visual acuity under nocturnal conditions that northern pine snakes experience under diurnal conditions.