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Reproduction and health of moose in southern Sweden

Malmsten, Jonas (2014). Reproduction and health of moose in southern Sweden. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2014:19
ISBN 978-91-576-7986-4
eISBN 978-91-576-7987-1
[Doctoral thesis]

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Abstract

Moose (Alces alces) is a highly regarded game species in Fennoscandia, where annual harvest numbers in Sweden, Norway, and Finland together exceed 200,000 animals. For successful management, knowledge about male and female reproduction is essential, as well as the extent to which disease and mortality affect the population. In 2006, a sub-normal reproductive output (calf per cow ratio) was reported from the island of Öland, and a pilot study in 2007 revealed embryonic mortality and occurrence of the tick-borne pathogen Anaplasma phagocytophilum. An expansion of the study (including control areas) was conducted due to the need for updated information on moose reproduction

From 2008 to 2011, reproductive organs, blood, spleens, mandibles, and ectoparasites were collected from moose in three areas in southern Sweden. Reproductive organs were inspected macroscopically, weighed and measured, and
sperm samples were taken. Morphology of spermatozoa, chromatin analyses, histological examinations, and pathogen analyses were performed at SLU or SVA in Uppsala.

Male pubertal age varied from 1.5 to 3.5 years, and the proportion of normal spermatozoa increased significantly with increasing body weight, but decreased temporally over the first month of hunting. Male moose had a low testes:body weight ratio compared with other cervids. Cows showed their first oestrus of the season earlier than heifers, and the hunting period appeared to interfere with oestrus in all females. Onset of puberty in females was positively associated with body weight but not with age. Embryonic mortality and unfertilized oocytes accounted for a significant difference (P<0.01) between ovulation rates and the proportion of viable embryos found in pregnant females. Moose were competent hosts of Anaplasma
phagocytophilum, and the prevalence of infection, as determined by PCR, varied both temporally and spatially. Moose calf summer survival rates on Öland were significantly
lower than in the mainland populations.

The studies performed provide updated information on moose reproductive
characteristics, calf survival and moose health. Some changes in population management could potentially improve the reproductive success of moose in southern Sweden. Not all of these parameters might be affected by a change in management, as the surrounding environment and climate play a considerable role in forage availability, the spread of diseases, and calf survival rates.

Authors/Creators:Malmsten, Jonas
Title:Reproduction and health of moose in southern Sweden
Series/Journal:Acta Universitatis agriculturae Sueciae
Year of publishing :2014
Volume:2014:19
Number of Pages:76
Papers/manuscripts:
NumberReferences
I.Malmsten J., Söderquist L., Thulin C.-G., Dalin A.-M. (2014). Characteristics of spermatozoa and reproductive organs in relation to age and body weight in Swedish moose (Alces alces). Submitted.
II.Malmsten J., Söderquist L., Thulin C.-G., Gavier Widén D., Yon L., Hutchings MR., Dalin A.-M. (2014). Reproductive characteristics in female Swedish moose (Alces alces) with emphasis on puberty, timing of oestrus, and mating. Submitted.
III.Malmsten J., Dalin A.-M. (2013). Embryonic mortality and unfertilized oocytes in Scandinavian moose (Alces alces). Acta Theriologica, DOI: 10.1007/s13364-013-0173-6.
IV.Ericsson, G., Malmsten J., Neumann W., Singh N., Dalin A.-M. Summer calf survival of Scandinavian moose along its southern distribution range. Manuscript.
V.Malmsten J., Gavier Widen D., Rydevik G., Yon L., Hutchings MR., Thulin C.-G., Söderquist L., Aspan A., Stuen S., Dalin A.-M. (2013). Temporal and spatial variation in Anaplasma phagocytophilum infection in Swedish moose (Alces alces) Epidemiology and Infection, DOI: 10.1017/S0950268813002094.
Place of Publication:Uppsala
Publisher:Dept. of Clinical Sciences, Swedish University of Agricultural Sciences
Associated Programs and Other Stakeholders:SVA - National Veterinary Institute > A contributor is enlisted in SVA
SLU - Environmental assessment > Programme Non-Toxic Environment
ISBN for printed version:978-91-576-7986-4
ISBN for electronic version:978-91-576-7987-1
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:L Animal production > L20 Animal ecology
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Other Biological Topics
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 403 Veterinary Science > Clinical Science
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 405 Other Agricultural Sciences > Fish and Wildlife Management
Agrovoc terms:elks, alces, reproduction, male animals, female animals, sexual maturity, embryonic mortality, anaplasma, calves, survival, health, game mammals, management, sweden
Keywords:Alces alces, Anaplasma phagocytophilum, corpus luteum, corpus albicans, epididymis, embryonic mortality, female and male reproduction, moose management, sperm morphology, testis
URN:NBN:urn:nbn:se:slu:epsilon-e-1838
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-1838
ID Code:11098
Faculty:VH - Faculty of Veterinary Medicine and Animal Science
Department:(VH) > Dept. of Clinical Sciences
External funders:EU FP7 and Swedish Environmental Protection Agency and Svenska jägareförbundet
Deposited By: Dr Jonas Malmsten
Deposited On:02 Apr 2014 10:37
Metadata Last Modified:14 Dec 2014 13:13

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