Convergent and Alternative Designs for Vertebrate Suspension Feeding
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Oreochromis Rukwaensis) Ecological Risk Screening Summary
Lake Rukwa Tilapia (Oreochromis rukwaensis) Ecological Risk Screening Summary U.S. Fish & Wildlife Service, March 2012 Revised, July 2018 Web Version, 6/4/2020 Organism Type: Fish Overall Risk Assessment Category: Uncertain 1 Native Range and Status in the United States Native Range From Froese and Pauly (2018): “Africa: Lake Rukwa in Tanzania.” From Shechonge et al. (2019): “Oreochromis rukwaensis (Hilgendorf & Pappenheim 1903) previously known only from Lake Rukwa was present in an upstream section of the Ruaha river system, where a major exploited population was recorded at the Mtera Dam Lake [Tanzania].” Status in the United States No records of Oreochromis rukwaensis occurrences in the United States were found. No information on trade of O. rukwaensis in the United States was found. 1 The Florida Fish and Wildlife Conservation Commission has listed the tilapia, Oreochromis rukwaensis as a prohibited species. Prohibited nonnative species (FFWCC 2020), "are considered to be dangerous to the ecology and/or the health and welfare of the people of Florida. These species are not allowed to be personally possessed or used for commercial activities." Means of Introductions in the United States No records of Oreochromis rukwaensis occurrences in the United States were found. Remarks No additional remarks. 2 Biology and Ecology Taxonomic Hierarchy and Taxonomic Standing According to Eschmeyer et al. (2018), Oreochromis rukwaensis (Hilgendorf and Pappenheim 1903) is the current valid name of this species. From ITIS (2018): Kingdom Animalia -
6-A John James Audubon, American Flamingo, 1838
JOHN JAMES AUDUBON [1785–1851] 6 a American Flamingo,1838 American Flamingo is one of the 435 hand-colored engravings that River, a major flyway for migratory birds, and eventually wan- make up John James Audubon’s monumental Birds of America, dered farther from home to comb the American frontier for issued in four volumes between 1826 and 1838. The massive unrecorded species. publication includes life-size representations of nearly five hundred Audubon’s procedure was to study and sketch a bird in its natural species of North American birds. Although Audubon was not the habitat before killing it carefully, using fine shot to minimize dam- first to attempt such a comprehensive catalog, his work departed age. His critical innovation was to then thread wire through the from conventional scientific illustration, which showed lifeless spec- specimen, allowing him to fashion a lifelike pose. He worked in imens against a blank background, by presenting the birds as they watercolor, and had completed some four hundred paintings appeared in the wild. When his pictures were first published, when he decided to publish them as a folio of prints. Failing to find some naturalists objected to Audubon’s use of dramatic action and support in Philadelphia, he sailed for England, where he became pictorial design, but these are the qualities that set his work apart lionized as “The American Woodsman.” The engraving firm and make it not only an invaluable record of early American Robert Havell and Son took on the challenge of reproducing wildlife but an unmatched work of American art. Audubon’s paintings on copper plates and tinting the resulting John James Audubon was born in Haiti and educated in France, black-and-white prints by hand. -
Catalogue of the Amphibians of Venezuela: Illustrated and Annotated Species List, Distribution, and Conservation 1,2César L
Mannophryne vulcano, Male carrying tadpoles. El Ávila (Parque Nacional Guairarepano), Distrito Federal. Photo: Jose Vieira. We want to dedicate this work to some outstanding individuals who encouraged us, directly or indirectly, and are no longer with us. They were colleagues and close friends, and their friendship will remain for years to come. César Molina Rodríguez (1960–2015) Erik Arrieta Márquez (1978–2008) Jose Ayarzagüena Sanz (1952–2011) Saúl Gutiérrez Eljuri (1960–2012) Juan Rivero (1923–2014) Luis Scott (1948–2011) Marco Natera Mumaw (1972–2010) Official journal website: Amphibian & Reptile Conservation amphibian-reptile-conservation.org 13(1) [Special Section]: 1–198 (e180). Catalogue of the amphibians of Venezuela: Illustrated and annotated species list, distribution, and conservation 1,2César L. Barrio-Amorós, 3,4Fernando J. M. Rojas-Runjaic, and 5J. Celsa Señaris 1Fundación AndígenA, Apartado Postal 210, Mérida, VENEZUELA 2Current address: Doc Frog Expeditions, Uvita de Osa, COSTA RICA 3Fundación La Salle de Ciencias Naturales, Museo de Historia Natural La Salle, Apartado Postal 1930, Caracas 1010-A, VENEZUELA 4Current address: Pontifícia Universidade Católica do Río Grande do Sul (PUCRS), Laboratório de Sistemática de Vertebrados, Av. Ipiranga 6681, Porto Alegre, RS 90619–900, BRAZIL 5Instituto Venezolano de Investigaciones Científicas, Altos de Pipe, apartado 20632, Caracas 1020, VENEZUELA Abstract.—Presented is an annotated checklist of the amphibians of Venezuela, current as of December 2018. The last comprehensive list (Barrio-Amorós 2009c) included a total of 333 species, while the current catalogue lists 387 species (370 anurans, 10 caecilians, and seven salamanders), including 28 species not yet described or properly identified. Fifty species and four genera are added to the previous list, 25 species are deleted, and 47 experienced nomenclatural changes. -
What Do Tadpoles Really Eat? Assessing the Trophic Status of an Understudied and Imperiled Group of Consumers in Freshwater Habitats
Freshwater Biology (2007) 52, 386–395 doi:10.1111/j.1365-2427.2006.01694.x OPINION What do tadpoles really eat? Assessing the trophic status of an understudied and imperiled group of consumers in freshwater habitats RONALD ALTIG,* MATT R. WHILES† AND CINDY L. TAYLOR‡ *Department of Biological Sciences, Mississippi State University, Mississippi State, MS, U.S.A. †Department of Zoology and Center for Ecology, Southern Illinois University, Carbondale, IL, U.S.A. ‡Department of Biology, Austin Peay State University, Clarksville, TN, U.S.A. SUMMARY 1. Understanding the trophic status of consumers in freshwater habitats is central to understanding their ecological roles and significance. Tadpoles are a diverse and abundant component of many freshwater habitats, yet we know relatively little about their feeding ecology and true trophic status compared with many other consumer groups. While many tadpole species are labelled herbivores or detritivores, there is surprisingly little evidence to support these trophic assignments. 2. Here we discuss shortcomings in our knowledge of the feeding ecology and trophic status of tadpoles and provide suggestions and examples of how we can more accurately quantify their trophic status and ecological significance. 3. Given the catastrophic amphibian declines that are ongoing in many regions of the planet, there is a sense of urgency regarding this information. Understanding the varied ecological roles of tadpoles will allow for more effective conservation of remaining populations, benefit captive breeding programmes, and allow for more accurate predic- tions of the ecological consequences of their losses. Keywords: amphibian, assimilation, diet, feeding behaviour, omnivory Amphibians are disappearing from the planet at an of the functional roles and trophic status of general- alarming rate (Stuart et al., 2004; Lips et al., 2005). -
Flamingo ABOUT the GROUP
Flamingo ABOUT THE GROUP Bulletin of the IUCN-SSC/Wetlands International The Flamingo Specialist Group (FSG) was established in 1978 at Tour du Valat in France, under the leadership of Dr. Alan Johnson, who coordinated the group until 2004 (see profile at www.wetlands.org/networks/Profiles/January.htm). Currently, the group is FLAMINGO SPECIALIST GROUP coordinated from the Wildfowl & Wetlands Trust at Slimbridge, UK, as part of the IUCN- SSC/Wetlands International Waterbird Network. The FSG is a global network of flamingo specialists (both scientists and non- scientists) concerned with the study, monitoring, management and conservation of the world’s six flamingo species populations. Its role is to actively promote flamingo research and conservation worldwide by encouraging information exchange and cooperation amongst these specialists, and with other relevant organisations, particularly IUCN - SSC, Ramsar, WWF International and BirdLife International. FSG members include experts in both in-situ (wild) and ex-situ (captive) flamingo conservation, as well as in fields ranging from field surveys to breeding biology, diseases, tracking movements and data management. There are currently 165 members around the world, from India to Chile, and from France to South Africa. Further information about the FSG, its membership, the membership list serve, or this bulletin can be obtained from Brooks Childress at the address below. Chair Assistant Chair Dr. Brooks Childress Mr. Nigel Jarrett Wildfowl & Wetlands Trust Wildfowl & Wetlands Trust Slimbridge Slimbridge Glos. GL2 7BT, UK Glos. GL2 7BT, UK Tel: +44 (0)1453 860437 Tel: +44 (0)1453 891177 Fax: +44 (0)1453 860437 Fax: +44 (0)1453 890827 [email protected] [email protected] Eastern Hemisphere Chair Western Hemisphere Chair Dr. -
Trinidad & Tobago II 2019 BIRDS
Field Guides Tour Report Trinidad & Tobago II 2019 Dec 27, 2019 to Jan 5, 2020 Tom Johnson For our tour description, itinerary, past triplists, dates, fees, and more, please VISIT OUR TOUR PAGE. Each one of those red dots is a Scarlet Ibis - and look closely, you'll see a strip of pink from the American Flamingo flock at the bottom. This was our evening scene at Caroni Swamp. Photo by group member Delle Daniels. The island nation of Trinidad and Tobago provides an accessible bounty of neotropical wildlife with comfortable accommodation. Our holiday tour this year was no exception – we spent five nights at the famed Asa Wright Nature Centre in Trinidad and two nights on the sandy shores of the Atlantic on Tobago. We drank coffee and tea in the morning as the rising sun brought legions of hummingbirds and honeycreepers to the feeding station below the Asa Wright veranda, studied the mating displays of the odd Bearded Bellbird and transforming White-bearded Manakin, sought the stunning Blue-and- yellow Macaw at Nariva Swamp, enjoyed the waves of brilliant Scarlet Ibis ripple past at Caroni Swamp, and watched with excitement as Magnificent Frigatebirds tail-chased Red-billed Tropicbirds over the blue water below Little Tobago Island. There was something for everyone – for those who were taken by Neotropical birding challenges, there were Chestnut-collared and Lesser Swallow-tailed swifts to pick out of the skies above the Arima Valley and a Gray-throated Leaftosser skulking in the shadows. For those more attracted to spectacles of movement and color, we turned to the diminutive Tufted Coquettes of Asa Wright’s gardens and the jaw-droppingly pink American Flamingos striding below the river of Scarlet Ibis at Caroni Swamp. -
View/Download
CICHLIFORMES: Cichlidae (part 3) · 1 The ETYFish Project © Christopher Scharpf and Kenneth J. Lazara COMMENTS: v. 6.0 - 30 April 2021 Order CICHLIFORMES (part 3 of 8) Family CICHLIDAE Cichlids (part 3 of 7) Subfamily Pseudocrenilabrinae African Cichlids (Haplochromis through Konia) Haplochromis Hilgendorf 1888 haplo-, simple, proposed as a subgenus of Chromis with unnotched teeth (i.e., flattened and obliquely truncated teeth of H. obliquidens); Chromis, a name dating to Aristotle, possibly derived from chroemo (to neigh), referring to a drum (Sciaenidae) and its ability to make noise, later expanded to embrace cichlids, damselfishes, dottybacks and wrasses (all perch-like fishes once thought to be related), then beginning to be used in the names of African cichlid genera following Chromis (now Oreochromis) mossambicus Peters 1852 Haplochromis acidens Greenwood 1967 acies, sharp edge or point; dens, teeth, referring to its sharp, needle-like teeth Haplochromis adolphifrederici (Boulenger 1914) in honor explorer Adolf Friederich (1873-1969), Duke of Mecklenburg, leader of the Deutsche Zentral-Afrika Expedition (1907-1908), during which type was collected Haplochromis aelocephalus Greenwood 1959 aiolos, shifting, changing, variable; cephalus, head, referring to wide range of variation in head shape Haplochromis aeneocolor Greenwood 1973 aeneus, brazen, referring to “brassy appearance” or coloration of adult males, a possible double entendre (per Erwin Schraml) referring to both “dull bronze” color exhibited by some specimens and to what -
PREHISTORIC FORAGING PATTERNS at CA-SAC-47 SACRAMENTO COUNTY, CALIFORNIA a Thesis Presented to the Faculty of the Department Of
PREHISTORIC FORAGING PATTERNS AT CA-SAC-47 SACRAMENTO COUNTY, CALIFORNIA A Thesis Presented to the Faculty of the Department of Anthropology California State University, Sacramento Submitted in partial satisfaction of the requirements for the degree of MASTER OF ARTS in Anthropology by Justin Blake Cairns SUMMER 2016 © 2016 Justin Blake Cairns ALL RIGHTS RESERVED ii PREHISTORIC FORAGING PATTERNS AT CA-SAC-47 SACRAMENTO COUNTY, CALIFORNIA A Thesis by Justin Blake Cairns Approved by: ________________________________, Committee Chair Mark E. Basgall, Ph.D. ________________________________, Second Reader Jacob L. Fisher, Ph.D. ____________________________ Date iii Student: Justin Blake Cairns I certify that this student has met the requirements for format contained in the University format manual, and that this thesis is suitable for shelving in the Library and credit is to be awarded for the thesis. __________________________________, Graduate Coordinator _______________ Jacob Fisher, Ph.D. Date Department of Anthropology iv Abstract of PREHISTORIC FORAGING PATTERNS AT CA-SAC-47 SACRAMENTO COUNTY, CALIFORNIA by Justin Blake Cairns Subsistence studies conducted on regional archaeological deposits indicate that in the Sacramento Delta, as in the rest of the Central Valley, there is a decrease in foraging efficiency during the Late Period. A recently excavated site, CA-SAC-47, provides direct evidence of subsistence strategies in the form of faunal and plant remains. This faunal assemblage is compared to direct evidence of subsistence from Delta sites SAC-42, SAC-43, SAC-65, SAC-145, and SAC-329. The results and implications of this direct evidence are used to address site variability and resource selectivity. ___________________________________, Committee Chair Mark E. -
A History of the Salmonid Decline in the Russian River
A HISTORY OF THE SALMONID DECLINE IN THE RUSSIAN RIVER A Cooperative Project Sponsored by Sonoma County Water Agency California State Coastal Conservancy Steiner Environmental Consulting Prepared by Steiner Environmental Consulting August 1996 Steiner Environmental Consulting Fisheries, Wildlife, and Environmental Quality P. O. Box 250 Potter Valley, CA 95469 A HISTORY OF THE SALMONID DECLINE IN THE RUSSIAN RIVER A Cooperative Project Sponsored By Sonoma County Water Agency California State Coastal Conservancy Steiner Environmental Consulting Prepared by Steiner Environmental Consulting P.O. Box 250 Potter Valley, CA 95469 August 1996 (707) 743-1815 (707) 743-1816 f«x [email protected] EXECUTIVE SUMMARY BACKGROUND Introduction This report gathers together the best available information to provide the historical and current status of chinook salmon, coho salmon, pink salmon, and steelhead in the Russian River basin. Although the historical records are limited, all sources depict a river system where the once dominant salmonids have declined dramatically. The last 150 years of human activities have transformed the Russian River basin into a watershed heavily altered by agriculture and urban development. Flows in the main river channel river are heavily regulated. The result is a river system with significantly compromised biological functions. The anthropogenic factors contributing to the decline of salmonids are discussed. Study Area The 1,485 square mile Russian River watershed, roughly 80 miles long and 10 to 30 miles wide, lies in Mendocino, Sonoma, and Lake counties. The basin topography is characterized by a sequence of northwest/southeast trending fault-block ridges and alluvial valleys. Lying within a region of Mediterranean climate, the watershed is divided into a fog-influenced coastal region and an interior region of hot, dry summers. -
The Metamorphosis of the Endostyle (Thy- Roid Gland) of Ammocoetes Branchialis (Larval Land-Locked Petromyzon Marinus (Jordan) Or Petromy- Zon Dorsatus (Wilder) ).*I
THE METAMORPHOSIS OF THE ENDOSTYLE (THY- ROID GLAND) OF AMMOCOETES BRANCHIALIS (LARVAL LAND-LOCKED PETROMYZON MARINUS (JORDAN) OR PETROMY- ZON DORSATUS (WILDER) ).*I BY DAVID MARINE, M.D. (From the H. K. Cushing Laboratory of Experimental Medicine, Western Reserve University, Cleveland, and the Laboratory of Histology and Embryology, Cornell University, Ithaca.) PLATES 66 TO 70, INTRODUCTION. Wilhelm Mfil.ler in I873 homologized the endostyle, or hypo- branchial groove, of the Tunicate, Amphioxus, and the larval Petro- myzon with the thyroid gland of all higher chordates. Subse- quent investigations have served to strengthen this remarkable homology, which would have been impossible of demonstration but for the survival of a single ctass of vertebrates, the Cyclostomes, of which the Petromyzontid~e, or Lampreys, are the best known order. The lamprey embraces in its own life history both the fullest devel- opment of the endostyle mechanisms and the characteristic ductless * Received for publication, December 3o, I912. 1I am indebted to Professor B. F. Kingsbury for the privileges of his labora- tory and for helpful criticisms and suggestions. I wish also to thank Professor S. H. Gage for helpful suggestions, and Mr. J. F. Badertscher for aid in many technical problems. 2In addition to the ventral midline subpharyngeal glandular structure, or endostyle proper, there are accessory structures directly continuous with the endostyle epithelium developed in the pharyngeal mucosa that are believed to function as the path of conduction for the slime cord issuing from the orifice of the endostyle. This function has not, however, been observed in the Am- mocoetes and is based on reasoning by analogy from Giard's (Giard, A., Arch. -
Kclo4 Inhibits Thyroidal Activity in the Larval Lamprey Endostyle in Vitro
GENERAL AND COMPARATIVE ENDOCRINOLOGY General and Comparative Endocrinology 128 (2002) 214–223 www.academicpress.com KClO4 inhibits thyroidal activity in the larval lamprey endostyle in vitro Richard G. Manzon*,1 and John H. Youson Department of Zoology and Division of Life Sciences, University of Toronto at Scarborough, 1265 Military Trail, Toronto, Ont., Canada MIC 1A4 Accepted 5 July 2002 Abstract An in vitro experimental system was devised to assess the direct effects of the goitrogen, potassium perchlorate (KClO4), on ra- dioiodide uptake and organification by the larval lamprey endostyle. Organification refers to the incorporation of iodide into lamprey thyroglobulin (Tg). Histological and biochemical evidence indicated that endostyles were viable at the termination of a 4 h in vitro incubation. A single iodoprotein, designated as lamprey Tg, was identified in the endostylar homogenates by polyacrylamide gel electrophoresis and Western blotting. Lamprey Tg was immunoreactive with rabbit anti-human Tg serum and had an electrophoretic mobility similar to that of reduced porcine Tg. When KClO4 was added to the incubation medium, both iodide uptake and orga- nification by the endostyle were significantly reduced relative to controls as determined by gamma counting, and gel-autoradiography and densitometry, respectively. Western blotting showed that KClO4 significantly lowered the total amount of lamprey Tg in the endostyle. Based on the results of this in vitro investigation, we conclude that KClO4 acts directly on the larval lamprey endostyle to inhibit thyroidal activity. These data support a previous supposition from in vivo experimentation that KClO4 acts directly on the endostyle to suppress the synthesis of thyroxine and triiodothyronine, resulting in a decrease in the serum levels of these two hormones. -
Incorporating Biodiversity Concerns in Fisheries Management
Efforts to incorporate Biodiversity Concerns in Management of the Fisheries of Lake Victoria, East Africa Richard Ogutu-Ohwayo National Agricultural Research Organization, Fisheries Resources Research Institute, P. O. Box 343, Jinja, Uganda. E-mail: [email protected] Table of Contents Table of Contents...................................................................................................................................... 1 Abstract ..................................................................................................................................................... 3 Relationships between Components of Aquatic Systems ...................................................................... 3 Geographic Setting of Lake Victoria....................................................................................................... 3 Importance of Fisheries and Biodiversity in Fisheries ...........................................................................4 The Early Fisheries, their Exploitation and Management ...................................................................... 4 Status and Past Trends due to Human Exploitation and Management Efforts for Lake Victoria..... 5 Trends in Non-target Biodiversity Concerns .......................................................................................... 7 The Original Institutional, Policy and Legal Framework....................................................................... 8 Lessons from Past Efforts to Manage the Fisheries of Lake Victoria...................................................