Effects of age and body weight on the proportion of females breeding in a population of roe deer (Capreolus capreolus)

1992 ◽  
Vol 70 (8) ◽  
pp. 1541-1545 ◽  
Author(s):  
Jean-Michel Gaillard ◽  
Antoine J. Sempéré ◽  
Jean-Marie Boutin ◽  
Guy Van Laere ◽  
Bernard Boisaubert
Keyword(s):  
Body Weight ◽  
Reproductive Success ◽  
Sexual Maturity ◽  
Roe Deer ◽  
Significant Proportion ◽  
Capreolus Capreolus ◽  
Reproductive State ◽  
Blood Samples ◽  
Young Females ◽  
Very High

The reproductive state of female roe deer (Capreolus capreolus) (n = 140) caught during 4 consecutive winters (January and February) was determined from progesterone concentrations in blood samples. We found that (i) females older than 20 months were pregnant almost every year, indicating that though monoestrous, this species can achieve a very high conception rate (98%); (ii) a significant proportion of females 20 months of age (corresponding to the usual age at first pregnancy) had not reached sexual maturity; and (iii) body weight measured in winter could be used to predict the probability of pregnancy for young females (20 months of age) but not for older females. The correlation observed between age, body weight, and reproductive success suggests the hypothesis that the proportion of young females that breeds is density dependent. Ecological conditions mediated by social behaviour and prevailing during the spring of birth could constitute the ultimate factor determining pregnancy rate at 20 months.

Interrelationships between reproductive cycle, age, body weight and steroid hormones in roe deer females (Capreolus capreolus)

2016 ◽  
Vol 65 (1) ◽  
pp. 59-64
Author(s):  
Alexander V. Sirotkin ◽  
Marta Oravcová ◽  
Jaroslav SlamečKA ◽  
Abdel Halim Harrath ◽  
Matúš RajskÝ
Keyword(s):  
Body Weight ◽  
Steroid Hormones ◽  
Reproductive Cycle ◽  
Roe Deer ◽  
Capreolus Capreolus

scholarly journals Field evidence that roe deer (Capreolus capreolus) are a natural host for Ehrlichia phagocytophila

2000 ◽  
Vol 124 (2) ◽  
pp. 315-323 ◽  
Author(s):  
M. P. ALBERDI ◽  
A. R. WALKER ◽  
K. A. URQUHART
Keyword(s):  
Ixodes Ricinus ◽  
Roe Deer ◽  
Capreolus Capreolus ◽  
Chain Reaction ◽  
Serum Samples ◽  
Blood Samples ◽  
Ehrlichia Phagocytophila ◽  
The United Kingdom ◽  
Field Evidence ◽  
Polymerase Chain

Samples of blood, spleen and legs from 112 culled roe deer (Capreolus capreolus) were collected from nine sites widespread in the United Kingdom. The prevalence of infection with Ehrlichia phagocytophila was determined by serology and polymerase chain reaction. Means of 58% of 102 plasma or serum samples were seroreactive by IFA, 38% of 84 blood samples and 29% of 82 spleen samples were positive by PCR. Ticks on legs of 71 roe deer were Ixodes ricinus larvae, nymphs and adults and 83% of legs were infested. Numbers of ticks corresponded positively to the percentage of samples positive for E. phagocytophila by serology and PCR for different sampling sites. Ixodes ricinus nymphs collected from the vegetation at one site with infected deer were analysed for infection with E. phagocytophila by examination of Feulgen stained salivary glands. Of 135 nymphs 5% were infected. These results confirm that roe deer are commonly parasitized by both E. phagocytophila and its vector tick in such a way that it is likely to be an important natural mammalian reservoir of E. phagocytophila.

scholarly journals Growth of wild muskoxen under two nutritional regimes in Greenland

Rangifer ◽  
1994 ◽  
Vol 14 (1) ◽  
pp. 3 ◽  
Author(s):  
Carsten Riis Olesen ◽  
Henning Thing ◽  
Peter Aastrup
Keyword(s):  
Body Weight ◽  
Food Supply ◽  
Sexual Maturity ◽  
Significant Proportion ◽  
Seasonal Fluctuation ◽  
East Greenland ◽  
Forage Plants ◽  
Nutritional Conditions ◽  
One Year ◽  
Maximum Body

Growth of muskoxen in Jameson Land, East Greenland (EG) and in Angujaartorfiup Nunaa, West Greenland (WG) is affected by the different nutritional conditions in the two areas. The abundance and availability of forage plants is highest in WG. Muskoxen in WG reach sexual maturity one year earlier than muskoxen in EG. A significant proportion of female muskoxen in WG conceive at the age of 16 months and give birth to their first calf as two years olds. The horn bases of the muskox bulls in WG are fully developed during their third year of life, but their maximum body weight (BW) is attained at the age of six. Average BW of adult bulls (4 yr+) in WG is 306 kg which is 23 % greater than in adult bulls in EG. BW is seasonally more variable in EG than in WG owing to greater seasonal fluctuation in food supply.

Seasonal variation in body composition of European roe deer

1992 ◽  
Vol 70 (3) ◽  
pp. 502-504 ◽  
Author(s):  
Øystein Holand
Keyword(s):  
Body Composition ◽  
Body Weight ◽  
Roe Deer ◽  
Capreolus Capreolus ◽  
Whole Body ◽  
Life Strategy ◽  
Southeastern Part ◽  
Fat Reserves ◽  
Free Body ◽  
Mating Territories

Seasonal variations in whole-body composition of 43 European roe deer (Capreolus capreolus L.) collected in the southeastern part of Norway were examined. Adult deer showed a defined annual cycle in both body weight and body fat reserves. Fat accumulated in September and October, reaching a maximum of 9.2% of the ingesta-free body weight in does and 10.3% in bucks, in late fall (November and December). The depletion phase started in early January and ended in April. No intersexual differences in amplitude or synchrony of body weight or fat cycle were observed. This contrasts with results in other temperate and northern cervids and could be due to differences in life strategy, particularly reproductive effort (midsummer rut, delayed implantation, and mating territories), in European roe deer.

scholarly journals Assessment of selected indicators of the individual condition of roe deer Capreolus capreolus in the closed hunting season

2021 ◽  
Vol 19 (4) ◽  
pp. 87-92
Author(s):  
Piotr Czyżowski ◽  
◽  
Anna Okrasa ◽  
Mirosław Karpiński ◽  
◽  
...  
Keyword(s):  
Body Weight ◽  
Breeding Season ◽  
Roe Deer ◽  
Capreolus Capreolus ◽  
Kidney Weight ◽  
Hunting Season ◽  
Vegetation Growth ◽  
Reduced Body ◽  
Fat Reserves ◽  
Individual Condition

The aim of the study was to assess the condition of roe deer in the closed hunting season based on the analysis of body weight and fat reserves in roe deer killed in road collisions. The research material consisted of kidneys dissected from 12 bucks, 4 does, and 5 fawns killed in road accidents between February 12 and May 10, 2020. The measurements were used for calculation of the kidney fat index (KFI) based on the formula [Bobek et al. 1984]: KFI = kidney weight with fat/kidney weight without fat. The study presents the distribution of the analyzed parameters with reference to the animal sex and month in which the animal died in the road collision. A distinct decline in the value of fat reserves expressed as the KFI index and the perirenal fat weight mass was observed in the study. In the first two months (February, March), this decrease coincided with reduced body weight, which rapidly increased in April. This may have been related to the intensive vegetation growth. Nevertheless, the costs of the breeding season (primarily in males) resulted in further weight loss in May. The analysis of carcass weight and fat reserves in roe deer killed in road collisions can complete the information about their individual condition and indirectly shows the condition of the roe deer population in the closed hunting season, i.e. in the critical period for this species (winter and the beginning of the breeding season).

scholarly journals Comparison of Reproductive Performance of the Roe Deer (Capreolus capreolus, L.) Among Different Regions

2006 ◽  
pp. 41-46
Author(s):  
István Majzinger
Keyword(s):  
Body Weight ◽  
Reproductive Performance ◽  
Roe Deer ◽  
Capreolus Capreolus ◽  
Corpora Lutea ◽  
Actual Number ◽  
Offspring Number ◽  
Region I ◽  
The Difference ◽  
Autumn And Winter

The potential and actual number of offspring of roe deer and the difference between these figures (prenatal and postnatal loss) significantly vary in each population yearly. The objective of this study is to examine the potential and actual number of offspring, the number of losses, and to find a link between the most important biological characteristics of does (body weight – BW, condition – KFI) and the number of raised offspring on four territories on the Great Hungarian Plain.Where the number of corpora lutea (CL) is the highest, there the losses are the highest as well, and the number of raised offspring is the lowest (region I.). Here, the rearing loss is double that of the weakest territory (region IV.). Rearing losses can be associated with the fenotype of does (BW, KFI) but environmental factors also have determinative importance. Where the number of twin-calving does was the highest, I found four times more does without a fawn than where the number of twin-calving does was the lowest. The nursing success was the best (the losses were lowest) in the region where the potential offspring (number of CL) was also the lowest, but the coverage of the habitat and the proportion of forests were largest. The food supply for the animals in autumn and winter are not enough, the structure of the habitat has to be improved as well, so that it might become adequate for game protection in extreme weather conditions.The results have to be considered as preliminary ones. It is essential to continue and extend the research to increase the reliability of the results.

scholarly journals Effects of selenium administration on blood serum Se content and on selected reproductive characteristics of sheep (short communication)

2006 ◽  
Vol 49 (2) ◽  
pp. 176-180 ◽  
Author(s):  
A. Balicka-Ramisz ◽  
B. Pilarczyk ◽  
A. Ramisz ◽  
M. Wieczorek
Keyword(s):  
Body Weight ◽  
Reproductive Success ◽  
Blood Serum ◽  
Short Communication ◽  
Control Group ◽  
Blood Samples ◽  
Merino Sheep ◽  
Sheep Farm ◽  
And Control ◽  
Deficient Area

Abstract. Effects of selenium on certain indicators of sheep reproductive success and on Se level in the sheep's blood serum were studied in 2001–2002 on 100 Polish merino sheep ewes kept in a Western Pomeranian sheep farm. The 100 ewes were picked out on random and divided into two equal groups: treatment and control. The blood samples for serum Se assays were collected prior to administration of sodium selenide (before servicing) and 7 days after the treatment. The study was aimed at determining Se effects on the reproductive success (fecundity) of ewes and on selected indicators of lamb utility in a Se-deficient area. Se administration prior to servicing enhanced the herd’s reproductive success. The treatment group’s litter size was by 0.38 lamb per ewe higher than that of the control. The control group lamb body weight was lower than that of the treatment group by an average of 0.23 kg on birth and 0.31 kg 33 days later.

The influence of increasing density on body weight, kid production, home range and winter grouping in roe deer (Capreolus capreolus)

1995 ◽  
Vol 236 (3) ◽  
pp. 371-382 ◽  
Author(s):  
J. P. Vincent ◽  
E. Bideau ◽  
A. J. M. Hewison ◽  
J. M. Angibault
Keyword(s):  
Body Weight ◽  
Home Range ◽  
Roe Deer ◽  
Capreolus Capreolus

Enamel Thickness Differs between Field and Forest European Roe Deer Capreolus capreolus

2020 ◽  
Vol 68 (1) ◽  
pp. 100
Author(s):  
Jan Demesko ◽  
Marta Kurek ◽  
Patrycja Podlaszczuk ◽  
Janusz Markowski
Keyword(s):  
Roe Deer ◽  
Capreolus Capreolus ◽  
Enamel Thickness

scholarly journals The modular organization of roe deer (Capreolus capreolus) body during ontogeny: the effects of sex and habitat

2018 ◽  
Vol 15 (1) ◽  
Author(s):  
Svetlana Milošević-Zlatanović ◽  
Tanja Vukov ◽  
Srđan Stamenković ◽  
Marija Jovanović ◽  
Nataša Tomašević Kolarov
Keyword(s):  
Roe Deer ◽  
Capreolus Capreolus ◽  
Modular Organization
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