scholarly journals The Sundrun population of wild reindeer

Rangifer ◽  
2003 ◽  
Vol 23 (5) ◽  
pp. 193
Author(s):  
Ivan Sivtsev
Keyword(s):  
Population Dynamics ◽  
Sex Ratio ◽  
Rangifer Tarandus ◽  
Population Estimates ◽  
Seasonal Migrations ◽  
Wintering Areas ◽  
The 1950S ◽  
Wild Reindeer ◽  
Separate Population

The Sundrun wild reindeer (Rangifer tarandus) herd was recognized as a separate population during the 1950s. Since then, the herd has ranged over an area of approximately 180 000 km2 between the Indigirka and Kolyma Rivers in northeastern Yakutia. Population dynamics and movements were investigated between 1987 and 1997. During this period, the population estimates ranged from 25 000 to 45 000 reindeer, the sex ratio averaged 55 bulls:100 cows, and the percentage of calves in the herd ranged between 17% and 25%. The main routes of seasonal migrations, wintering areas, and the location of calving areas are discussed.

scholarly journals Wild reindeer of the Kamchatka Peninsula - past, present, and future

Rangifer ◽  
1996 ◽  
Vol 16 (4) ◽  
pp. 385
Author(s):  
Vladimir Mosolov
Keyword(s):  
Industrial Development ◽  
Rangifer Tarandus ◽  
Kamchatka Peninsula ◽  
The 1950S ◽  
Northeastern Kamchatka ◽  
Wild Reindeer ◽  
Commercial Hunting

A unique subspecies of wild reindeer (Rangifer tarandus phylarchus Hollister) that is endemic to the Kamchatka Peninsula has been declining in number since the 1950s due to commercial hunting, increasing industrial development and competition with domestic reindeer. The largest remaining herd of wild reindeer occurs in the Kronotsky Reserve in northeastern Kamchatka, and the reserve is now critical to the preservation of this subspecies of reindeer.

scholarly journals Population dynamics of the Taimyr reindeer population

Rangifer ◽  
1996 ◽  
Vol 16 (4) ◽  
pp. 381 ◽  
Author(s):  
B.M. Pavlov ◽  
L.A. Kolpashchikov ◽  
V.A. Zyryanov
Keyword(s):  
Population Dynamics ◽  
Rangifer Tarandus ◽  
Winter Range ◽  
Krasnoyarsk Region ◽  
Rangifer Tarandus Tarandus ◽  
Commercial Harvest ◽  
The World ◽  
Reindeer Population ◽  
Wild Reindeer ◽  
Commercial Harvesting

The Taimyr herd of wild reindeer (Rangifer tarandus tarandus L.) is one of the three largest herds of wild Rangifer in the world, and numbered about 600 000 in 1993. The herd grew continuously from 1959 to 1990, and is now stable due primarily to intensive commercial harvesting along the Khatanga River. Meat from the commercial harvest is processed and sold in population centers in the northern Krasnoyarsk region, particularly Norilsk. The herd has expanded its range to about 1.5 million km2, but movements to the southwestern portion of the winter range may have been impeded by pipeline, road and railroad construction, and winter shipping of ore on the lower Yenisey River.

Can management regulate the population size of wild reindeer (Rangifer tarandus) through harvest?

2012 ◽  
Vol 90 (2) ◽  
pp. 163-171 ◽  
Author(s):  
O. Strand ◽  
E.B. Nilsen ◽  
E.J. Solberg ◽  
J.C.D. Linnell
Keyword(s):  
Population Size ◽  
Rangifer Tarandus ◽  
Small Population ◽  
Population Estimates ◽  
Relative Role ◽  
Harvest Data ◽  
Closed Populations ◽  
Southern Norway ◽  
Wild Reindeer

We analyzed a 51-year time series of harvest data from a small population of wild mountain reindeer ( Rangifer tarandus (L., 1758)) in southern Norway and examined the relative role of biological and management related processes as drivers of its population dynamics. The population is monitored annually to obtain information on population size and structure, and since 1980, managers have attempted to stabilize the population at about 1.1 reindeer/km2. The harvest increased at a higher rate than the population size and was thus probably sufficient to not only limit but also regulate population size. Phase plot analyses showed that the population has varied around a density attractor of about 1.0 reindeer/km2 since 1980 and is therefore close to the targeted population size of 1.1 reindeer/km2. However, the annual harvest explained only 49% of the variation in population growth rate (λ) in a linear regression model, despite relatively low variation in population productivity (proportion of calves). Between 1999 and 2006, the population in Forolhogna declined by almost 50% before recovering to its previous size. We suggest that both imprecise population estimates and high harvest effectiveness at reduced population densities contributed to this decline. As such, this study points to some of the obstacles managers are facing when trying to stabilize productive ungulate populations even when they live in closed populations and in stable, predator-free environments.

Population dynamics of Stenothoe valida Dana, 1852 (Amphipoda, Stenothoidae) at Cheongsapo beach of Busan, Republic of Korea

Crustaceana ◽  
2021 ◽  
Vol 94 (4) ◽  
pp. 413-429
Author(s):  
Ye Ji Lee ◽  
Won Gyu Park
Keyword(s):  
Population Dynamics ◽  
Life History ◽  
Sex Ratio ◽  
Brood Size ◽  
Ovigerous Female ◽  
Seasonal Pattern ◽  
Recruitment Rate ◽  
Republic Of Korea ◽  
Female Size ◽  
History Of

Abstract The population dynamics of Stenothoe valida Dana, 1852 were studied at Cheongsapo beach of Busan, Republic of Korea, from March 2019 to March 2020. Sampling was conducted once a month at low tide during spring tides. Specimens were grouped by the cephalic length at 0.025 mm intervals, and classified into four categories: females, ovigerous females, males and juveniles. The sex ratio, defined as females : total males + females, exceeded 0.5 during most of the study period. Brood size was significantly coupled with ovigerous female size. Two to four cohorts appeared at each study period. New cohorts occurred at almost every sampling except in the samples Jun-2, and Nov-2. Life span was estimated at 1-2 months. The juvenile ratio, the ratio of ovigerous females, and the recruitment rate estimated by FiSAT were commonly high in summer and winter. The life history of S. valida was not coupled with water temperature, but had a strong seasonal pattern.

scholarly journals Red fox sex ratio and changes in the number in the Krasnoarmeisky District of the Samara Region

2018 ◽  
Vol 7 (2) ◽  
pp. 111-115
Author(s):  
Olga Aleksandrovna Sklueva ◽  
Valeriy Vitalyevich Sklyuev ◽  
Rafik Ibragimovich Khakimov
Keyword(s):  
Population Dynamics ◽  
Sex Ratio ◽  
Vulpes Vulpes ◽  
Red Fox ◽  
Direct Impact ◽  
Age Composition ◽  
Behavioral Adaptations ◽  
Epizootic Process ◽  
Males And Females ◽  
Homeostatic State

The paper presents some data on the red fox ( Vulpes vulpes , Linnaeus, 1758) sex ratio in the Krasnoarmeysky District of the Samara Region. The results of winter trails traces of mammals show the placement of individual sites of males and females. The authors consider relationship between the population dynamics, sex and age composition and the placement of individual sites. Some aspects of behavioral adaptations and causes of changes in the number of animals in the study area are considered. The influence of a poaching factor on the dynamic indicators of the studied population and the possible danger of the epizootic process is described. A comparative analysis with the previously obtained data on the ratio of males and females in the litter is carried out. The paper indicates possible causes of animals number changes in the study areas. Poaching has a direct impact on the studied population homeostatic state maintaining mechanisms. There is also a forecast of poaching influence on deterioration of epidemiological and epizootic situation in the investigated region. In this paper we give recommendations to minimize possible damage by human activities.

scholarly journals Wild reindeer of Yakutia

Rangifer ◽  
1996 ◽  
Vol 16 (4) ◽  
pp. 387
Author(s):  
V.M. Safronov
Keyword(s):  
Rangifer Tarandus ◽  
Mountainous Areas ◽  
New Siberian Islands ◽  
Rangifer Tarandus Tarandus ◽  
Wild Meat ◽  
Wild Reindeer

Three major herds of wild reindeer (Rangifer tarandus tarandus L.), totaling over 200,000 animals, occur in the tundra and taiga of northern Yakutia. These herds have been expanding since the late 1950s and now occupy most of their historic range. In addition, several thousand wild reindeer occupy the New Siberian Islands and adjacent coastal mainland tundra, and there are about 60,000 largely sedentary forest reindeer in mountainous areas of the southern two-thirds of the province. Wild reindeer are commercially hunted throughout the mainland, and the production of wild meat is an important part of the economy of the province and of individual reindeer enterprises which produce both wild and domestic meat.

scholarly journals Cumulative Impacts of Tourist Resorts on Wild Reindeer (Rangifer tarandus tarandus) during Winter

ARCTIC ◽  
2000 ◽  
Vol 53 (1) ◽  
Author(s):  
Christian Nellemann ◽  
Per Jordhøy ◽  
Ole-Gunnar Støen ◽  
Olav Strand
Keyword(s):  
Rangifer Tarandus ◽  
Cumulative Impacts ◽  
Rangifer Tarandus Tarandus ◽  
Wild Reindeer

scholarly journals World status of wild Rangifer tarandus populations

Rangifer ◽  
1986 ◽  
Vol 6 (2) ◽  
pp. 19 ◽  
Author(s):  
T. Mark Williams ◽  
Douglas C. Heard
Keyword(s):  
North America ◽  
North American ◽  
Aerial Photography ◽  
Rangifer Tarandus ◽  
Population Estimates ◽  
World Population ◽  
South Georgia ◽  
The World ◽  
Strip Transect

We recognized 184 herds of wild Rangifer tarandus, 102 in North America, 55 in Europe, 24 in Asia and 3 on South Georgia. Seventy-five percent of the world population of 3.3 to 3.9 million animals occurred in nine herds. All seven herds larger than 120 000 animals were censused by some means of aerial photography and all were increasing. Herds between 20 000 and 120 000 were most often censused using aerial strip transect methods, while total counts were usually employed to census smaller herds. The most pronounced changes in Rangifer herd status between 1979 and 1985 occurred in North America where population "estimates for five herds increased by a total of about one million animals. Part of this increase is attributable to a change from visual to photographic surveys. Eighty-three percent of North American, 88% of European, and 68% of Asian herds were stable or increasing.

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