Mittwoch, 06 Juli 2022 08:50

COSEWIC (2009)

COSEWIC assessment and update status report on the Northern Leopard Frog Lithobates pipiens, Rocky Mountain population, Western Boreal/Prairie populations and Eastern populations, in Canada.

Committee on the Status of Endangered Wildlife in Canada, Ottawa. vii + 69 pp. (www.sararegistry.gc.ca/status/status_e.cfm)

Species information:

The Northern Leopard Frog (Lithobates pipiens) is 60 to 110 millimetres in length, with females generally larger than males. It may be either green or brown on the dorsal surface, which is covered with large, rounded dark spots outlined with light halos. The underside is white. Two light-coloured dorsolateral ridges line its back, one on each side, from behind the eyes to the lower back.

Three designatable units (DUs) are recognized in order to accurately portray the status of the Northern Leopard Frog in Canada. These are based on evidence for genetic distinction between western and eastern populations and the isolation of populations west of the Rocky Mountains. The Rocky Mountain DU consists of populations in British Columbia. The Prairie/Western Boreal DU contains the populations in the Alberta, Saskatchewan, the Northwest Territories and Manitoba approximately west of the Canadian Shield. The Eastern DU consisting of all those populations of the Canadian Shield, Great Lakes/St. Lawrence, Appalachian/Atlantic Coast and Carolinian faunal provinces.

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Donnerstag, 09 September 2021 06:02

NATIONAL GEOGRAPHIC (2011)

Kanada-Nationalparks. Reise- und Naturführer.

(Auflage 2017): 368 Seiten, ca. 150 Abbildungen. ISBN: 9783955591960.

Produktinformation:

Mit übersichtlichen Detailkarten, 3D-Grafiken und der großen Reisekarte zum Herausnehmen sind Sie immer auf dem richtigen Weg. Mit über 500 Adressen. 44 Nationalparks und 4 Meeresparks liegen in Kanada genug für ein paar Urlaube. Ob Kluane, Banff, Jasper, Kap Breton oder Kootenay: Für jeden erhalten Sie in diesem National Geographic Reiseführer ausführliche Informationen zu den Sehenswürdigkeiten, Vorschläge für spannende Touren und nützliche Adressen. Erleben Sie das Beste von Kanadas Nationalparks und eine Menge Geheimtipps sorgfältig vor Ort recherchiert.

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Donnerstag, 14 Juni 2018 15:17

SKY WORELL, G. (1990)

Kanada. Die Nationalparks der Rocky Mountains.

232 Seiten, mit zahlreichen Fptos, Landkarten.

Verlag: Umschau, Frankfurt. ISBN-10: 352467027X, ISBN-13: 978-3524670270

 

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Donnerstag, 14 Juni 2018 14:03

TESSIER, T. (2000)

White Spirit Bear by Grandma Tess.

48 Seiten, farbig illustriert.

Hancock House Publishers, Surrey, BC. ISBN 0-88839-462-4.

Inhalt:

This book tells the story of the unusual and beautiful creatures that inhabit ancient rainforests on the northwest coast of British Columbia. Seldom interacting with humans, these rare white black bears have lived peacefully for centuries in the pristine environment of Princess Royal Island and the surrounding mainland. Readers will discover where the bears live, what they eat, how they behave and why they are white. Known as the bears' goodwill ambassador, author Grandma Tess also discusses the importance of preserving the bears' habitat. Through her messages of 'caring and sharing', readers realise the importance of learning to live in harmony with all the creatures of the earth. The author introduces the Spirit Bears through stunning photographs and informative topics. The book appeals to different reading levels so that children can read along, read aloud or read alone. There is simple text for beginners and there is fuller, complementary text for more experienced readers. Though it is written for young people, the subject is one that concerns everyone. This book is sure to be treasured by the entire family.

 

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Donnerstag, 14 Juni 2018 07:28

STEPHENSON, M. (1983)

Canada's National Parks.

A Visitor guide.

308 Seiten, mit Lankarten und zuahlreichen s/w-Fotos
Prentice-Hall Canada Inc., Scarborough, Ontario. ISBN 0-13-113977-0.

Inhalt:

Es werden alle 29 Nationalparks Kanadas vorgestellt. Zu jedem Park gibt es Informationen über Topografie, Fauna und Flora soie praktische Hinweise für den Besuch

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Donnerstag, 14 Juni 2018 09:08

DEROCHER, A. E., & STIRLING, J. (1996)

Aspects of survival in juvenile polar bears.

Can. J. Zool, 74:1246-1252.

Abstract:

We captured, weighed, tagged, and monitored polar bear (Ursus maritimus) cubs and yearlings in western Hudson Bay to examine survival rates and correlates with survival. Cub survival between spring and autumn increased with cub mass and maternal mass, but was not related to maternal age or maternal condition. Cub survival between spring and autumn varied annually between 39.0 and 100.0% and averaged 53.2%. Whole-litter loss between spring and autumn was 30.8%, and only 38.0% of the females did not lose any cubs. Survival of spring twins was similar regardless of size, but in triplet litters, survival between spring and autumn varied according to cub size. Minimum cub survival from one autumn to the next was 34.7% and was related to cub mass, maternal mass, and maternal condition. Cub survival during autumn was estimated at 83.0%. Survival during the first year of life was no more than 44.0% but we could not estimate an annual survival rate because of the sampling regime. Possibly because harvesting was the major mortality factor for yearlings (19.4% of the yearlings were removed from the population per year), no factors examined correlated with survival of yearlings. We found no sex-related differences in survival of cubs or yearlings in any period. Relationships between survival in polar bear cubs and their condition suggest that lack of food availability, sometimes due to low maternal fat stores for lactation, leads to starvation and may be the main cause of mortality.

Aspects of survival in juvenile polar bears (PDF Download Available). Available from: https://www.researchgate.net/publication/238037133_Aspects_of_survival_in_juvenile_polar_bears [accessed Jun 21 2018].

 

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