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Relational Database Systems 1
Relational Database Systems 1 Wolf-Tilo Balke Jan-Christoph Kalo Institut für Informationssysteme Technische Universität Braunschweig www.ifis.cs.tu-bs.de Summary last week • Data models define the structural constrains and possible manipulations of data – Examples of Data Models: • Relational Model, Network Model, Object Model, etc. – Instances of data models are called schemas • Careful: Often, sloppy language is used where people call a schema also a model • We have three types of schemas: – Conceptual Schemas – Logical Schemas – Physical Schemas • We can use ER modeling for conceptual and logical schemas Relational Database Systems 1 – Wolf-Tilo Balke – Institut für Informationssysteme – TU Braunschweig 2 Summary last week • Entity Type Name • Weak Entity Type Name • Attribute name • Key Attribute name • name Multi-valued Attribute name name • Composite Attribute name • Derived Attribute name • Relationship Type name • Identifying Relationship Type name EN 3.5 Relational Database Systems 1 – Wolf-Tilo Balke – Institut für Informationssysteme – TU Braunschweig 3 Summary last week • Total participation of E2 in R E1 r E2 • Cardinality – an instance of E1 may relate to multiple instances of E2 (0,*) (1,1) E1 r E2 • Specific cardinality with min and max – an instance of E1 may relate to multiple instances of E2 (0,*) (0,1) E1 r E2 EN 3.5 Relational Database Systems 1 – Wolf-Tilo Balke – Institut für Informationssysteme – TU Braunschweig 4 3 Extended Data Modeling • Alternative ER Notations • Extended ER – Inheritance – Complex Relationships -
Lesson Plan: Squirrel Study - Nests
LESSON PLAN: SQUIRREL STUDY - NESTS Date: Class: Unit: LESSON TOPIC: Squirrel Study with Smack Dab in the Middle of Maybe AIM: In Smack Dab in the Middle of Maybe, the main character Cricket discovers squirrels in a nest above the treehouse. Students can use the novel as a starting point for learning more about squirrels. OBJECTIVES: Students will be able to: 1. Identify grey squirrels. 2. Provide information about a squirrel’s nesting behavior. 3. Recognize the behavior of grey squirrels in Smack Dab in the Middle of Maybe. GET STARTED/ DO-NOW: In the novel, Cricket notices a squirrel nest above her treehouse. The nest was made by eastern grey squirrels. Have the students read the article by National Geographic about grey squirrels. Instruct them to write down five facts. https://kids.nationalgeographic.com/animals/eastern-gray- squirrel/#eastern-gray-squirrel-tree.jpg If personal computers are not available, read the article aloud. After you have finished, instruct the students to write down facts they remember. Have the students share the facts with the class. MINI-LESSON: 1. There are several species of squirrels found in North America. Eastern grey squirrels are one of them. Other species include American red squirrels and fox squirrels. Introduce these other two species by showing the class images like the ones found on these webpages: Fox Squirrel: https://www.arkive.org/eastern-fox-squirrel/sciurus-niger/ American Red Squirrel: http://www.arkive.org/american-red- squirrel/tamiasciurus-hudsonicus/ 2. Provide each student with a blank map of the United States. Together as a class, color in the areas where grey squirrels are commonly found. -
Mammal Watching in the Pacific Northwest, Summer 2019 with Notes on Birding, Locations, Sounds, and Chasing Chipmunks
Mammal watching in the Pacific Northwest, summer 2019 With notes on birding, locations, sounds, and chasing chipmunks Keywords: Sciuridae, trip report, mammals, birds, summer, July Daan Drukker 1 How to use this report For this report I’ve chosen not to do the classic chronological order, but instead, I’ve treated every mammal species I’ve seen in individual headers and added some charismatic species that I’ve missed. Further down I’ve made a list of hotspot birding areas that I’ve visited where the most interesting bird species that I’ve seen are treated. If you are visiting the Pacific Northwest, you’ll find information on where to look for mammals in this report and some additional info on taxonomy and identification. I’ve written it with a European perspective, but that shouldn’t be an issue. Birds are treated in detail for Mount Rainier and the Monterey area, including the California Condors of Big Sur. For other areas, I’ve mentioned the birds, but there must be other reports for more details. I did a non-hardcore type of birding, just looking at everything I came across and learning the North American species a bit, but not twitching everything that was remotely possible. That will be for another time. Every observation I made can be found on Observation.org, where the exact date, location and in some cases evidence photos and sound recordings are combined. These observations are revised by local admins, and if you see an alleged mistake, you can let the observer and admin know by clicking on one of the “Contact” options in the upper right panel. -
Modelling the Population Dynamics of the Mt. Graham Red Squirrel: Can We Predict Its Future in a Changing Environment with Multiple Threats?
BIOLOGICAL CONSERVATION 131 (2006) 121– 131 available at www.sciencedirect.com journal homepage: www.elsevier.com/locate/biocon Modelling the population dynamics of the Mt. Graham red squirrel: Can we predict its future in a changing environment with multiple threats? S.P. Rushtona, D.J.A. Woodb, P.W.W. Lurza,*, J.L. Koprowskib aIRES, School of Biology, Devonshire Building, University of Newcastle upon Tyne, Newcastle upon Tyne, NE1 7RU, UK bWildlife Conservation and Management, School of Natural Resources, 325 Biological Sciences East, University of Arizona, Tucson, AZ 85721, USA ARTICLE INFO ABSTRACT Article history: The Mt. Graham red squirrel (Tamiasciurus hudsonicus grahamensis; MGRS) is among the Received 25 April 2005 most critically endangered mammals in the United States and is isolated on the periphery Received in revised form of the species’ range, potentially increasing its conservation priority. To investigate poten- 31 January 2006 tial threats to the population and provide a tool for land managers, we developed a spatially Accepted 24 February 2006 explicit population dynamics model. We tested model predictions using available range- Available online 17 April 2006 wide data from the literature and field work specific to the MGRS. A general model input data set using mean life history values overpredicted MGRS abundance. However, we found Keywords: significant correlation with known squirrel abundance using a general data set with cur- Conservation tailed fecundity and survival. A model with MGRS-specific data provided the best fit to SEPM observed population size. We investigated potential impacts of two major threats to the Endangered species MGRS: competition from introduced Abert’s squirrels (Sciurus aberti) and increased levels Introduced species of predation. -
(Tamiasciurus Hudsonicus) from Nova Scotia
Notes Records of Melanistic American Red Squirrels ( Tamiasciurus hudsonicus ) from Nova Scotia HOWARD M. H UYNH 1,2 *, B ERNARD L. B URKE 3, and DONALD F. M CALPINE 2 1 Department of Biology, Acadia University, Wolfville, Nova Scotia B4P 2R6 Canada 2 New Brunswick Museum, 277 Douglas Avenue, Saint John, New Brunswick E2K 1E5 Canada 3 21 Micmac Boulevard, Dartmouth, Nova Scotia B3A 4N3 Canada *Corresponding author: email: [email protected] Huynh, H. M., B. L. Burke, and D. F. McAlpine. 2011. Records of melanistic American Red Squirrels ( Tamiasciurus hudsonicus ) from Nova Scotia. Canadian Field-Naturalist 125(2): 15 4–157. Though melanism has been observed in several species of North American sciurids, the occurrence of this phenotype is rel - atively rare in American Red Squirrels ( Tamiasciurus hudsonicus ). We provide the first detailed accounts of melanistic Red Squirrels observed in Nova Scotia, Canada. Key Words: American Red Squirrel, Tamiasciurus hudsonicus , Melanism, Nova Scotia . Melanism in mammals refers to black or very dark of a typical adult Gray Squirrel. The presence of other brown pelage (Caro 2005), and is a relatively uncom - external characters – i.e., hair tufts protruding from the mon phenotype observed in most species of mammals top of the pinnae (more accentuated in winter pelage; (Guthrie 1967). While most populations exhibit grad - Steele 1998; Whitaker and Hamilton 1998) and small - ual intraspecific colour variation across their geo - er, flatter tail (Steele 1998) – also confirmed that this graphic range, there are some populations that show animal was a Red Squirrel. discontinuous variation (Caro 2005), with melanistic On March 22, 2010, the second author observed and (melanic) individuals occurring at high frequency photographed a young adult melanistic Red Squirrel (Guthrie 1967). -
Tree Squirrels As Invasive Species: Conservation and Management Implications
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln USDA National Wildlife Research Center Managing Vertebrate Invasive Species Symposia August 2007 TREE SQUIRRELS AS INVASIVE SPECIES: CONSERVATION AND MANAGEMENT IMPLICATIONS Geoffrey H. Palmer School of Natural Resources, The University of Arizona, Tucson, Arizona, USA John Koprowski School of Natural Resources, The University of Arizona, Tucson, Arizona, USA Tony Pernas Florida/Caribbean Exotic Plant Management Team, The National Park Service, Miami, Florida, USA Follow this and additional works at: https://digitalcommons.unl.edu/nwrcinvasive Part of the Environmental Indicators and Impact Assessment Commons Palmer, Geoffrey H.; Koprowski, John; and Pernas, Tony, "TREE SQUIRRELS AS INVASIVE SPECIES: CONSERVATION AND MANAGEMENT IMPLICATIONS" (2007). Managing Vertebrate Invasive Species. 36. https://digitalcommons.unl.edu/nwrcinvasive/36 This Article is brought to you for free and open access by the USDA National Wildlife Research Center Symposia at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Managing Vertebrate Invasive Species by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. TREE SQUIRRELS AS INVASIVE SPECIES: CONSERVATION AND MANAGEMENT IMPLICATIONS GEOFFREY H. PALMER AND JOHN L. KOPROWSKI , School of Natural Resources, The University of Arizona, Tucson, Arizona, USA TONY PERNAS , Florida/Caribbean Exotic Plant Management Team, The National Park Service, Miami, Florida, USA Abstract: -
Impacts of Grey Squirrels on Woodland Birds: an Important Predator of Eggs and Young?
BTO Research Report No. 328 Impacts of Grey Squirrels on Woodland Birds: An Important Predator of Eggs and Young? Authors C.M. Hewson & R.J. Fuller A report by the British Trust for Ornithology June 2003 © British Trust for Ornithology and Woodland Heritage British Trust for Ornithology, The Nunnery, Thetford, Norfolk, IP24 2PU Registered Charity No. 216652 British Trust for Ornithology Impacts of Grey Squirrels on Woodland Birds: An Important Predator of Eggs and Young? BTO Research Report No. 328 C.M. Hewson & R.J. Fuller Published in June 2003 by the British Trust for Ornithology The Nunnery, Thetford, Norfolk, IP24 2PU, UK Copyright © British Trust for Ornithology and Woodland Heritage 2003 ISBN 1-902576-70-5 All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form, or by any means, electronic, mechanical, photocopying, recording or otherwise, without the prior permission of the publishers. LIST OF CONTENTS Page No. Summary................................................................................................................................................3 1. INTRODUCTION ...................................................................................................................5 2. NEST PREDATION BY SQUIRRELS – A REVIEW OF THE LITERATURE..............7 3. NEST PREDATION BY GREY SQUIRRELS – ANECDOTAL AND CIRCUMSTANTIAL EVIDENCE ........................................................................................9 4. FACTORS INFLUENCING VARIATION -
List of Taxa for Which MIL Has Images
LIST OF 27 ORDERS, 163 FAMILIES, 887 GENERA, AND 2064 SPECIES IN MAMMAL IMAGES LIBRARY 31 JULY 2021 AFROSORICIDA (9 genera, 12 species) CHRYSOCHLORIDAE - golden moles 1. Amblysomus hottentotus - Hottentot Golden Mole 2. Chrysospalax villosus - Rough-haired Golden Mole 3. Eremitalpa granti - Grant’s Golden Mole TENRECIDAE - tenrecs 1. Echinops telfairi - Lesser Hedgehog Tenrec 2. Hemicentetes semispinosus - Lowland Streaked Tenrec 3. Microgale cf. longicaudata - Lesser Long-tailed Shrew Tenrec 4. Microgale cowani - Cowan’s Shrew Tenrec 5. Microgale mergulus - Web-footed Tenrec 6. Nesogale cf. talazaci - Talazac’s Shrew Tenrec 7. Nesogale dobsoni - Dobson’s Shrew Tenrec 8. Setifer setosus - Greater Hedgehog Tenrec 9. Tenrec ecaudatus - Tailless Tenrec ARTIODACTYLA (127 genera, 308 species) ANTILOCAPRIDAE - pronghorns Antilocapra americana - Pronghorn BALAENIDAE - bowheads and right whales 1. Balaena mysticetus – Bowhead Whale 2. Eubalaena australis - Southern Right Whale 3. Eubalaena glacialis – North Atlantic Right Whale 4. Eubalaena japonica - North Pacific Right Whale BALAENOPTERIDAE -rorqual whales 1. Balaenoptera acutorostrata – Common Minke Whale 2. Balaenoptera borealis - Sei Whale 3. Balaenoptera brydei – Bryde’s Whale 4. Balaenoptera musculus - Blue Whale 5. Balaenoptera physalus - Fin Whale 6. Balaenoptera ricei - Rice’s Whale 7. Eschrichtius robustus - Gray Whale 8. Megaptera novaeangliae - Humpback Whale BOVIDAE (54 genera) - cattle, sheep, goats, and antelopes 1. Addax nasomaculatus - Addax 2. Aepyceros melampus - Common Impala 3. Aepyceros petersi - Black-faced Impala 4. Alcelaphus caama - Red Hartebeest 5. Alcelaphus cokii - Kongoni (Coke’s Hartebeest) 6. Alcelaphus lelwel - Lelwel Hartebeest 7. Alcelaphus swaynei - Swayne’s Hartebeest 8. Ammelaphus australis - Southern Lesser Kudu 9. Ammelaphus imberbis - Northern Lesser Kudu 10. Ammodorcas clarkei - Dibatag 11. Ammotragus lervia - Aoudad (Barbary Sheep) 12. -
The Northern Goshawk on the Southern Blue Mountains and Malheur National Forest: a Technical Review of Its Status, Ecology and Management
The Northern Goshawk On the Southern Blue Mountains and Malheur National Forest: A Technical Review of its Status, Ecology and Management The Northern Goshawk on the Southern Blue Mountains and Malheur National Forest: A Technical Review of its Status, Ecology and Management August 2015 This project was funded: by the Oregon Department of Forestry’s Federal Forest Health Program through Agreement ODF 2191A2-14 with The Nature Conservancy and by the Blue Mountains Forest Partners (BMFP). Additional funding and support provided by High Desert Museum and Oregon State University. Graphic design and layout by: Aaron Fry, John Goodell, and Trent Seager. Photographs: We would like to thank the photographers and artists who generously contributed their work to the document: John Goodell, Sam Hobson, Rob Miller, Rob Palmer, Abbott Schindler, and Keith Thompson. Please do not use any of these images without permission from the listed photographer. The authors would like to thank: Susan Jane Brown (BMFP), Jay Carlisle (Intermountain Bird Observatory), Pat Kennedy (Oregon State University), Kim Mellen- McLean (US Forest Service), Rob Miller (Intermountain Bird Observatory), Mark Stern (The Nature Conservancy), and Mark Webb (BMFP) for their reviews and suggestions on earlier drafts of this paper. The authors are responsible for the views and information presented here, which do not necessarily reflect the views of our funders. Suggested citation: Goodell, J. M. and Seager, ST. 2015. The Northern Goshawk on the Southern Blue Mountains and Malheur National Forest: A Technical Review of its Status, Ecology and Management. The Nature Conservancy, Portland, OR. 93 p. Cover photograph: adult northern goshawk © Rob Palmer. -
RED SQUIRREL WINTER FOOD and COVER HABITAT SUITABILITY INDEX MODEL VERSION 5 Last Modified: 21 October 1999 Tara Banks, RR 2, Stn Main, Leduc Alberta
RED SQUIRREL WINTER FOOD AND COVER HABITAT SUITABILITY INDEX MODEL VERSION 5 Last Modified: 21 October 1999 Tara Banks, RR 2, Stn Main, Leduc Alberta. T9E 2X2. Barbara Beck, Department of Renewable Resources, University of Alberta, Edmonton, Alberta. T6G 2H1. James Beck, Department of Renewable Resources, University of Alberta, Edmonton, Alberta. T6G 2H1. Melissa Todd1, Foothills Model Forest, Box 6330, Hinton, Alberta. T7V 1X6. Richard Bonar2, Weldwood of Canada, Hinton Division, 760 Switzer Drive, Hinton, Alberta. T7V 1V7. Richard Quinlan3, Natural Resources Services, Suite 108, 111 - 54 Street, Edson, AB. T7E 1T2. 1. INTRODUCTION Habitat Suitability Index (HSI) models predict the suitability of habitat for a species based on an assessment of habitat attributes such as habitat structure, habitat type and spatial arrangements between habitat features. This HSI model for the red squirrel (Tamiasciurus hudsonicus) applies to habitats of the Foothills Model Forest (FMF) in west-central Alberta. The intended use is to predict habitat suitability at landscape scales and over long-time periods. The model will be used to determine potential changes in red squirrel habitat area and carrying capacity throughout an entire forest management cycle (200 years). The model was primarily developed using literature review. 2. SPECIES DESCRIPTION AND DISTRIBUTION The red squirrel is the most widely distributed and versatile squirrel in North America and ranges from Alaska to Newfoundland, south to South Carolina and west to the Rocky Mountains of New Mexico (Banfield 1974). Red squirrels are generally associated with coniferous forest but also use mixedwood and deciduous forests (Kemp and Keith 1970, Obbard 1987). Red squirrels are solitary and normally active during the day (C.C. -
The Urbanization of the Eastern Gray Squirrel in the United States
The Urbanization of the Eastern Gray Squirrel in the United States Etienne Benson If they had tuned in to radio station on July 12, 1934, residents of Washington, D.C., Downloaded from could have heard a talk by Vernon Bailey, the recently retired chief field naturalist of the U.S. Bureau of Biological Survey. Bailey was best known for his involvement in controver- sies over wolf eradication in the West, but his radio talk that day was on a subject closer to home and less politically charged, at least on the surface: “Animals Worth Knowing around the Capitol.” While he touched on a number of Washington-area animals that were “worth http://jah.oxfordjournals.org/ knowing,” he singled out one type for special attention: gray squirrels, which he described as “probably our best-known and most loved native wild animals, as they are not very wild and, being very intelligent, accept and appreciate our hospitality and friendship.”1 Compared to most of his listeners, Bailey was unusually well informed about the biology and ecology of urban squirrels, which he had been feeding in the backyard of his town- house in the Kalorama Triangle neighborhood for decades. Even so, his interest in the species and his belief in its virtues would probably not have surprised many of his fellow Washing- tonians. By the early twentieth century, eastern gray squirrels (Sciurus carolinensis), once by guest on December 7, 2013 limited to rural areas, had become the most visible nondomesticated mammals in American cities. Like Bailey, numerous naturalists, zoo directors, educators, park designers, and poets had attempted to convince the public of gray squirrels’ contribution to the urban landscape and their value as members of the urban community. -
The Anatomy of a Range Expansion: Changes in Cranial Morphology and Rates of Energy Extraction for North American Red Squirrels from Different Latitudes
OIKOS 102: 33–44, 2003 The anatomy of a range expansion: changes in cranial morphology and rates of energy extraction for North American red squirrels from different latitudes Jacob R. Goheen, Robert K. Swihart and James H. Robins Goheen, J. R., Swihart, R. K. and Robins, J. H. 2003. The anatomy of a range expansion: changes in cranial morphology and rates of energy extraction for North American red squirrels from different latitudes. – Oikos 102: 33–44. Species with expanding ranges provide unique opportunities to examine environmen- tally induced adaptations in ecological traits and anatomical characteristics. Since the late 1800s, the North American red squirrel (Tamiasciurus hudsonicus) has expanded its range into the central hardwoods of the United States in conjunction with increasing agricultural fragmentation. We examined whether red squirrels from the central hardwoods (west-central Indiana, USA) displayed differences in foraging behaviors and morphology relative to red squirrels from conifer-dominated environ- ments (upper peninsula of Michigan, USA), a biome in which red squirrels evolved. Specifically, we measured rates of energy extraction, variation in cranial morphology, and diet preference between red squirrels from both regions. In addition, we compared foraging behaviors of red squirrels from the central hardwoods to those of a competitor that coevolved with nut-producing trees, the gray squirrel (Sciurus carolinensis). Red squirrels from Indiana and Michigan differed significantly in the efficiency with which they used food items, with individuals from each region extracting calories at a more rapid rate for items that were common in their region. The enhanced efficiency of southern red squirrels feeding on black walnuts (Juglans nigra) was correlated with geographic differences in cranial morphology; skulls of southern squirrels were larger, with longer jaws and higher metrics associated with greater mandibular force than northern squirrels.