Conservation of the Sunda gharial Tomistoma schlegelii in Lake Mesangat, Indonesia.

International Zoo Yearbook 49: 137–149. ISSN 0074-9644.DOI: 10.1111/izy.12068.

Abstract:

Although featured in many international zoo collections for decades, little was known about the natural history of Sunda gharial Tomistoma schlegelii until recently. Zoos rarely keep large individuals and breeding success has been low. As late as 1998, even though most conservationists regarded the conservation status of the species as Endangered, the reality was that over most of the range the actual status of the Sunda gharial was Data Deficient. Beginning with surveys of the species by international and local scientists in Indonesian Sumatra and, later, in Kalimantan, Indonesian Borneo, supported by the International Union for Conservation of Nature/Species Survival Commission Crocodile Specialist Group, more details on the broad distribution of this crocodilian came to light. Ironically, rediscovery of a large and healthy population of T. schlegelii in East Kalimantan arose from an oil-palm company accessing the area to develop a site called Danau Mesangat. Subsequently through a cooperation agreement with the oil-palm company's conservation department and a local foundation, a group of dedicated zoos in Europe and America, and the Tomistoma Task Force set up by the Crocodile Specialist Group, provided funding for three consecutive years of field studies by a research group. These studies investigated the ecology of T. schlegelii and of a sympatric population of the Critically Endangered Siamese crocodile Crocodylus siamensis. The role of the zoos, including their role in the development of the research programme, is described. Accounts are given of the characteristics of the Mesangat habitat, some new details about the distribution and abundance of Sunda gharial and Siamese crocodiles in the habitat, and information about reproduction in T. schlegelii. In summary, an overview of threats and suggestions for conservation actions needed at the Mesangat site are provided.

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Conservation breeding of the Northern river terrapin Batagur baska at the Vienna Zoo, Austria, and in Bangladesh.

International Zoo Yearbook 49: 39–41. London Zoological Society. ISSN 0074-9664. DOI: 10.1111/izy.12070.

Abstract:

Wild populations of the Northern river terrapin Batagur baska have been decimated to such an extent that the species can be considered as ecologically extinct. Harvesting and habitat reduction are the main reasons for the drastic demise of B. baska, which formerly inhabited rivers and estuaries in East India, Bangladesh and Myanmar. A cooperative in situ and ex situ conservation project was established to secure the survival of this large river terrapin. In 2010, at Vienna Zoo, Austria, the first two captive-bred juveniles of the project hatched and presented an opportunity to call attention to this Critically Endangered species. With combined efforts a breeding population has been assembled in Bangladesh's Bhawal National Park and 84 juveniles have been reared in the past 2 years. Project-Batagur demonstrates how zoos can play a key role in sustainable long-term conservation of threatened species.

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Donnerstag, 14 Juni 2018 09:20

MALLON, D. P. & BUDD, K. (2011)

Regional Red List status of carnivores in the Arabian Peninsula.

49 Seiten, Abbildungen, Verbreitungskarten. IUCN, Gland und Cambrige und The Environment and Protected Areas Authority, Government of Sharjah, UAE

Abstract:

A Regional Red List Workshop for the carnivores of the Arabian Peninsula took place 8-10 February 2011. The aim of the workshop was to assess the regional conservation status of terrestrial carnivores in the Arabian Peninsula. The information provided here will help to put national conservation priorities into a regional context, thus maximising the effectiveness of local and national conservation measures, and facilitating the development of integrated regional conservation strategies. This Red List publication summarizes results for terrestrial carnivores and provides the first overview of the conservation status of these species to follow IUCN Regional Red Listing guidelines. It identifies species that are threatened with extinction at the regional level – in order that appropriate conservation action can be taken to improve their status.

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Estimating the global trade in Southeast Asian newts.


Biological Conservation 199: 96-100. http://dx.doi.org/10.1016/j.biocon.2016.05.001

Abstract:

The global trade in amphibians is widespread, involves hundreds of species, and has been implicated in amphibian population declines. The pet trade is the primary driver for population declines in one Southeast Asian newt species (Laotriton laoensis), and is a known threat tomost of the 13 other knownspecies fromthe region. Despite this, there has been little attempt to assess the impact of collection for the pet trade on Southeast Asian newts.We examined available import data from the US, Europe and Hong Kong, assessed current online trade and surveyed local pet traders within Southeast Asia. Large numbers of Southeast Asian newts are harvested from the wild to meet the demands of the international pet trade, with more than 7500 individual newts imported into the US alone during 2005–2014. Internet trade surveys revealed the global extent of the trade, with Southeast Asian newts for sale as pets in 15 countries throughout Europe, Asia and North America, at between ~ USD30–260 each. The trade in newts within Southeast Asia appears negligible in comparison. Urgent measures are required in order to conserve Southeast Asian newts but the lack of data on the species and number of individuals impacted by the pet trade makes it difficult to monitor and accurately assess its threat. We strongly recommend that all Southeast Asian newts be listed on CITES. This measure should improve monitoring of trade and provides importing countries opportunity to curb trade in species that were illegally harvested, thus helping to safeguard wild populations.

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Biologie, Gefährdung und Schutz der Groppe (Cottus gobio) in der Schweiz.

Mitt. zur Fischerei 77: 1-73. Hrsg. Bundesamt für Umwelt, Wald und Landschaft (BUWAL), Bern.

Zusammenfassung:

Die Groppe oder Koppe (Cottus gobio, L. 1758) ist in der Schweiz der einzige Vertreter der Familie der Cottidae. Dieser Kleinfisch bewohnt einen Teil der Schweizer Bäche und Seen. Obschon die Groppe in der Schweiz noch häufig vorkommt, wird sie infolge eines deutlichen Bestandesrückgangs innerhalb der letzten 50 Jahre zu den potenziell gefährdeten Fischarten gezählt. Da sie keine wirtschaftliche Bedeutung hat, ist sie nur selten in den Mittelpunkt spezifischer Forschungen gerückt.

Die Körperform der Groppe ist der bodenorientierten Lebensweise besonders gut angepasst. Der Körper ist länglich und zylinderförmig, mit einem breiten, abgeflachten Kopf, der etwa ein Drittel der Gesamtlänge einnimmt. Die beiden grossen Brustflossen erlauben eine gute Grundhaftung. Weitere Merkmalen sind das Fehlen einer Schwimmblase, eine glatte, schuppenfreie Haut und durch eine doppelte Cornea geschützte Augen.

Die Groppe ist eine europäische Art, die in kontinentalen Gewässern von Nordspanien bis in den Ural und von Südskandinavien bis Nordgriechenland vorkommt. Sie hält sich vorzugsweise in Forellengewässern auf, kommt jedoch auch in grossen Fliessgewässern und in Seen vor.

Mit zunehmendem Alter verlagern sich die ökologischen Ansprüche der Groppe bezüglich der Substratbenutzung, da dieses im Verhältnis zu ihrer Grösse steht. Die Jungfische bevorzugen grobkörnigen Schotter, während sich die grösseren Exemplare unter Steinen verbergen, welche ihren Dimensionen entsprechen. Zur Vollendung des Lebenszyklus benötigt die Groppe deshalb auf beschränktem Lebensraum ein Mosaik verschiedener Habitatstrukturen.

Die Nahrung der Groppe besteht hauptsächlich aus Invertebraten wie Trichopteren, Ephemeropteren und Dipteren. Sie selbst ist Beute für andere Fischarten (Forelle, Hecht, Aal, Barsch, Alet) sowie fischfressenden Vögel (Gänsesäger, Graureiher, Eisvogel). Der Eintritt in die Geschlechtsreife sowie die Laichzeit der Groppe variieren je nach Gewässer. Die Lebensdauer kann 3 bis 10 Jahre betragen; im Allgemeinen ist der Fisch mit 2 Jahren geschlechtsreif. Die Laichzeit findet zwischen Februar und Juni statt. In dieser Zeit legt das Weibchen seine Eier in einer vom Männchen bewachten Höhle an die Unterseite eines Steins ab. Die vom Männchen bewachte Brut wird durch Fächelbewegungen der Flossen mit ausreichend sauerstoffreichem Wasser versorgt. Die Entwicklungszeit der Eier beträgt rund 275 Tagesgrade.

Die Groppe wird von denselben Faktoren bedroht wie andere Fischarten. Habitatveränderungen (Gewässerunterhalt, Querbauten, Stauhaltungen, etc.) ziehen den Verlust der natürlichen Lebensraumvielfalt sowie der Fliessgewässer-Dynamik nach sich. Hindernisse verschiedener Art beeinträchtigen ihre Wandermöglichkeiten, trennen Populationen ab oder verhindern eine natürliche Neubesiedlung bestimmter Strecken. Ein stets aktuelles Thema bleibt die Gewässerbelastung durch Stoffe, deren Auswirkungen teilweise noch unbekannt sind.

Die wichtigsten Schutzmassnahmen für diese Fischart bestehen in der Renaturierung von stark verbauten Fliessgewässern, der Abschaffung oder Sanierung von Wanderhindernissen sowie der Bekämpfung der Gewässerverschmutzung.

Bestellung

 

zbinden-biblio

Freigegeben in Z
Donnerstag, 14 Juni 2018 09:58

LANGGEMACH, T. (2009)

Die Großtrappe in Deutschland - gerettet?

Der Falke 56: 456-463

Zusammenfassung:

Manche Vogelarten lassen sich über den Schutz einer einzigen Ressource "managen". Ganze Nistkastenpopulationen von Steinkauz oder Wiedehopf belegen diese Erfolge. Auch beim Fischadler lässt sich über künstliche Nisthilfen der Bestand anheben und die Reproduktion steigern, man kann die Lage der Brutplätzze steuern und in gewissem Maße Paare sogar gezielt umsiedeln. Die Großtrappen rangiert genau am anderen Ende der Skala. Schon vor achtzig Jahren wusste Oskar Heinroth, das Großtrappen "Sargnägel" sind, und auch wenn er sich dabei ausschließlich auf die Aufzucht bezogen hat, so ist ihm doch im weiteren Sinn beizupflichten: Die Großtrappe gehört zu den am schwierigsten zu schützenden Vögeln in Deutschland.

 

langgemach-biblio

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American Bison - Status Survey and Conservation Guidelines 2010.

134 Seiten. IUCN, Gland, Switzerland. ISBN: 978-2-8317-1149-2

Summary:

The publication of this IUCN American Bison Status Survey and Conservation Guidelines is timely owing to a recent convergence of factors: new research findings on bison genetics and ecology, assessment and awareness of the precarious status of many bison conservation herds, new initiatives by government and non-profit institutions to improve management of existing herds and to establish conservation herds, growing interest among Native Americans in restoring bison as part of their cultural heritage, and an increasing awareness by the commercial bison industry that conservation of wild-type bison is in the longterm interest of the industry. There is also a growing body of evidence that the biodiversity of ecosystems within the original range of bison can benefit from bison restoration, from the desert grasslands of northern Mexico, through the Great Plains, to the lowland meadow systems of interior Alaska. The ten chapters of this book examine these and other aspects of the biology and conservation of the species, and offer guidelines for what we anticipate will be a new era of bison conservation in North America. Under the auspices of the IUCN American Bison Specialist Group, twenty-nine chapter coordinators and contributors share their knowledge and ideas in this comprehensive review of the diverse topics that need to be considered by researchers, managers, policy makers and others interested in restoring and conserving this magnificent animal.

Chapter 1 Introduction: The Context
Chapter 2 History of Bison in North America
Chapter 3 Taxonomy and Nomenclature
Chapter 4 Genetics
Chapter 5 Reportable or Notifiable Diseases
Chapter 6 General Biology, Ecology and De
Chapter 8 Legal Status, Policy Issues and Listings
Chapter 9 Conservation Guidelines for Population, Genetic, and Disease Management
Chapter 10 Guidelines for Ecological Restoration of Bison

 

cormack-biblio

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The eradication of feral cats from Ascension Island and its subsequent recolonization by seabirds.

Oryx 44 (1): 20-29. DOI: http://dx.doi.org/10.1017/S003060530999069X (About DOI), Published online: 11 December 2009.

Abstract:

The introduction of mammal predators to islands often results in rapid declines in the number and range of seabirds. On Ascension Island the introduction of cats in 1815 resulted in extirpation of large seabird colonies from the main island, with relict populations of most species persisting only in cat-inaccessible locations. We describe the eradication of feral cats from this large and populated island. The campaign had to minimize risk to humans and maintain domestic animals in a state that prevented them re-establishing a feral population. Feral cat numbers declined rapidly in response to the strategic deployment of poisoning and live trapping, and cats were eradicated from the island within 2 years. During the project 38% of domestic cats were killed accidentally, which caused public consternation; we make recommendations for reducing such problems in future eradications. Since the completion of the eradication campaign cat predation of adult seabirds has ceased and five seabird species have recolonized the mainland in small but increasing numbers. Breeding success of seabirds at Ascension was low compared to that of conspecifics elsewhere, and the roles of food availability, inexperience of parent birds and black rat predation in causing this warrant further investigation. It is likely that the low breeding success will result in the rate of increase in seabird populations being slow.

 

ratcliffe-biblio

Freigegeben in R
Donnerstag, 14 Juni 2018 16:34

WEBER, R. (2007)

Vogelschutzprojekt der RSPB auf Ascension: Auf der Vogelinsel sollen wieder Vögel brüten.

ORNIS 2007 (2): 39-41

Zusammenfassung:

Vom Menschen eingeführte Ratten und Katzen haben auf der abgelegenen Atlantikinsel Ascension fast die gesamten Vogelbestände vernichtet. Nun aber bekämpfen die Royal Society for the Protection of Birds in einer groß angelegten Aktion die verwilderten Hauskatzen erfolgreich - und die ganze Insel wartet auf die Rückkehr der Meeresvögel.

Freigegeben in W
Donnerstag, 14 Juni 2018 12:38

ZHOU, C., XU, L. & ZHANG, Z. (2015)

Dramatic decline of the Vulnerable Reeves’s pheasant Syrmaticus reevesii, endemic to central China.

ORYX 49 Nr. 3 (Juli 2015): 529-534

Abstract

The current status and distribution of the Vulnerable Reeves’s pheasant Syrmaticus reevesii, endemic to central China, is poorly known. To obtain updated information on its status we selected 89 candidate sites in six provinces and one municipality in central China and conducted interviews and field surveys from April 2011 to April 2012. Interviews demonstrated the pheasant has disappeared from 46% of the surveyed sites. Our results also revealed a population decline at 46 sites, including protected areas, although population densities in protected areas were higher than those in non-protected areas. Eightythree, 26 and 20% of the surveyed sites had evidence of poaching, habitat loss and use of poison, respectively, which were the three major threats to this species. To ensure the long-term survival of Reeves’s pheasant in China, protection and management need to be enforced in both protected and non-protected areas. We recommend that this species should be upgraded to a national first-level protected species in China and recategorized as Endangered on the IUCN Red List.

 

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