English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

HE importance to the biotic community of various species of lemmings in arctic and subarctic regions has long been recognized, but there is little known about the ecology of these mammals. During the spring of 1949 the writer had the good fortune to observe a cyclic decline in the population of the brown lemming on the Arctic Coast of Alaska. Obser- vations were made during the peak density preceding this decline (Fig. 1), and were continued for more than a year subsequent to it. It is t$e purpose of this paper to present the results of these studies. Two species of lemmings occur on the Arctic Slope of Alaska; they are the collared lemming, Dicrostonyx groenlandicus rubricatus (Richard- son), and the brown lemming, Lemlnus trimucronatus alascensis Merriam. While both of these were observed during the course of this study, only the brown lemming was present in great numbers. However, both species were affected by whatever factors were responsible for the mortality which caused a precipitous decline in lemming numbers. The writer began observations on lemmings in the Point Barrow region on 22 March 1949, when an effort was made to secure some of the rodents for parasitological examination. Field observations made over this period are briefly presented here. This opportunity is taken to express appreciation to the Arctic Research Laboratory, Office of Naval Research, whose cooperation made this work possible.

Observations on a Cyclic Decline of Lemmings (<i>Lemmus</i>) on the Arctic Coast of Alaska During the Spring of 1949