The growth rate of a moose ( Alces alces L.) population in early winter
In practice of moose production planning estimates of the population size and the data on the magnitude of the increase are used (the number of embryos in pregnant females and number of females with calves), which are not accurate enough due to the large range of estimate of barrenness females (lim....
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Federal Agricultural Research Center of the North-East named N.V. Rudnitsky
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ftdoajarticles:oai:doaj.org/article:33a30766b97141fda5f723175dd925e5 2024-01-21T09:58:46+01:00 The growth rate of a moose ( Alces alces L.) population in early winter V. M. Glushkov 2016-08-01T00:00:00Z https://doaj.org/article/33a30766b97141fda5f723175dd925e5 RU rus Federal Agricultural Research Center of the North-East named N.V. Rudnitsky https://www.agronauka-sv.ru/jour/article/view/57 https://doaj.org/toc/2072-9081 https://doaj.org/toc/2500-1396 2072-9081 2500-1396 https://doaj.org/article/33a30766b97141fda5f723175dd925e5 Аграрная наука Евро-Северо-Востока, Vol 0, Iss 4, Pp 58-63 (2016) population growth age groups of moose method of data collection production planning Agriculture S article 2016 ftdoajarticles 2023-12-24T01:43:11Z In practice of moose production planning estimates of the population size and the data on the magnitude of the increase are used (the number of embryos in pregnant females and number of females with calves), which are not accurate enough due to the large range of estimate of barrenness females (lim.: 5.2-72.1%), and unknown proportion of females in some populations. A large range of values of the proportion of calves in samples from 43 regions: 8.3-35.7% due to differences in habitat conditions and errors of observation. In our material the proportion of calves in the autumn herd was 16.8-24.3% and estimate juvenile mortality by November was 38.6-47.6% of that it less than published data (55-81%). The identity of estimates of the growth rate calculated from data of field observations and the parameters of survival and mortality has led to creation of method of calculation of average growth of livestock by the beginning of winter l using the number of calves (cj) in total sample (n) consisting of detected animals in the nature in October-November: λо = n / (n - cj). For example, a sample of 973 elk with calves c1 = 163 gives the value of the exponent of the growth rate of the population at the beginning of winter: λo = 973 / (973 - 163) = 1,2012; and the growth rate of r0 = ln 1.2012 = 0.183. The value r0 = 0.183 in the form of the lagged growth rate: h = 1 - e- 0.183 = 0.168 (16.8%) serves as a measure of the limit value for total mortality of this species during the winter period providing zero growth rate of population. Second equation makes it easy to obtain values of parameter 1: regression of growth value on the date of the observations: y = 1.6212 • X-0.1271; (R2 = 0.8754) improving availability of the indicator "growth rate at the beginning of winter" for the practice of calculation of quotas of moose extraction. Article in Journal/Newspaper Alces alces Directory of Open Access Journals: DOAJ Articles |
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population growth age groups of moose method of data collection production planning Agriculture S |
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population growth age groups of moose method of data collection production planning Agriculture S V. M. Glushkov The growth rate of a moose ( Alces alces L.) population in early winter |
topic_facet |
population growth age groups of moose method of data collection production planning Agriculture S |
description |
In practice of moose production planning estimates of the population size and the data on the magnitude of the increase are used (the number of embryos in pregnant females and number of females with calves), which are not accurate enough due to the large range of estimate of barrenness females (lim.: 5.2-72.1%), and unknown proportion of females in some populations. A large range of values of the proportion of calves in samples from 43 regions: 8.3-35.7% due to differences in habitat conditions and errors of observation. In our material the proportion of calves in the autumn herd was 16.8-24.3% and estimate juvenile mortality by November was 38.6-47.6% of that it less than published data (55-81%). The identity of estimates of the growth rate calculated from data of field observations and the parameters of survival and mortality has led to creation of method of calculation of average growth of livestock by the beginning of winter l using the number of calves (cj) in total sample (n) consisting of detected animals in the nature in October-November: λо = n / (n - cj). For example, a sample of 973 elk with calves c1 = 163 gives the value of the exponent of the growth rate of the population at the beginning of winter: λo = 973 / (973 - 163) = 1,2012; and the growth rate of r0 = ln 1.2012 = 0.183. The value r0 = 0.183 in the form of the lagged growth rate: h = 1 - e- 0.183 = 0.168 (16.8%) serves as a measure of the limit value for total mortality of this species during the winter period providing zero growth rate of population. Second equation makes it easy to obtain values of parameter 1: regression of growth value on the date of the observations: y = 1.6212 • X-0.1271; (R2 = 0.8754) improving availability of the indicator "growth rate at the beginning of winter" for the practice of calculation of quotas of moose extraction. |
format |
Article in Journal/Newspaper |
author |
V. M. Glushkov |
author_facet |
V. M. Glushkov |
author_sort |
V. M. Glushkov |
title |
The growth rate of a moose ( Alces alces L.) population in early winter |
title_short |
The growth rate of a moose ( Alces alces L.) population in early winter |
title_full |
The growth rate of a moose ( Alces alces L.) population in early winter |
title_fullStr |
The growth rate of a moose ( Alces alces L.) population in early winter |
title_full_unstemmed |
The growth rate of a moose ( Alces alces L.) population in early winter |
title_sort |
growth rate of a moose ( alces alces l.) population in early winter |
publisher |
Federal Agricultural Research Center of the North-East named N.V. Rudnitsky |
publishDate |
2016 |
url |
https://doaj.org/article/33a30766b97141fda5f723175dd925e5 |
genre |
Alces alces |
genre_facet |
Alces alces |
op_source |
Аграрная наука Евро-Северо-Востока, Vol 0, Iss 4, Pp 58-63 (2016) |
op_relation |
https://www.agronauka-sv.ru/jour/article/view/57 https://doaj.org/toc/2072-9081 https://doaj.org/toc/2500-1396 2072-9081 2500-1396 https://doaj.org/article/33a30766b97141fda5f723175dd925e5 |
_version_ |
1788703637174747136 |