Zusammenhänge zwischen Verhalten und Fortpflanzungsleistung beim Reh (Capreolus capreolus L.)

Kurt, Fatma Esin

doi:10.1007/bf01999710

Cited by 9 publications

(8 citation statements)

References 1 publication

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“…Thus, our results might also provide some explanation for the observation of several researchers that with an increase in population density, in the 'forest' roe deer the sex ratio of new born fawns becomes biased towards males. This phenomenon and its sociobiological significance has been discussed at length (Kurt 1968, Ellenberg 1978, but never under a genetical aspect. If inbreeding increases with density as well, the male surplus could be due to sex ratio de pression as described by Senner (1980).…”

Section: Discussionmentioning

confidence: 99%

“…The same principle of social organ ization occurs in mountaneous areas closely to the climatic forest boundary where resources are subjected to seasonal fluctuations. According to these findings the social organization of roe deer can be predicted to a high degree by habitat structure (Kurt 1968, 1991, Strandgaard 1972, Ellenberg 1978, Dzi^ciolowski 1979, and differences in social organization are reflected by breeding strategies. In forest dwelling roe deer only territorial males are rutting and females usually copulate with only one and the same buck (Ellenberg 1978).…”

Section: Introductionmentioning

confidence: 95%

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Breeding strategies and genetic variation in European roe deer Capreolus capreolus populations

Kurt

Hartl²,

Völk³

1993

Acta Theriol.

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Based on previously published electrophoretic data on genetic variability in 31 roe deer Capreolus capreolus Linnaeus, 1758 populations, the proportion of loci poly morphic (P), average heterozygosity (H), and the inbreeding coefficient (Fis) were examined for relationships with the social structure displayed in the various-popu lations. Our hypothesis was that genetic variability is lower and F/s-values are more positive in populations where males maintain a stable pattern of territories during the rutting season (forest dwelling roe deer) than in those characterized by pronounced fluctuations in population structure, both within and among seasons (field or mountain dwelling roe deer). P and H did not show differences among those two groups. Fis was significantly more positive in the 'forest' roe deer than in the more migratory 'type', but only when populations subjected to high culling rates were excluded from the analysis. Highly negative Fis-values in forest populations with high culling rates suggested that considerable perturbations of population structure may be caused by hunting. In conclusion, the 'forest' roe deer and the 'field' roe deer do not represent two distinct ecotypes with a particular genetic integrity, but rather reflect the consid erable behavioural plasticity of the species.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Breeding strategies and genetic variation in European roe deer Capreolus capreolus populations

Kurt

Hartl²,

Völk³

1993

Acta Theriol.

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“…In this way density can be maintained on an adequate level, with simultaneous use of the reproductive potential of the population, which is higher when density is lower. This problem has also been discussed in studies by Andrzejewski & Jezierski (1967); Kurt (1968); Fruziński & Łabudzki (1982b).…”

Section: Discussionmentioning

confidence: 71%

“…. Borg (1970) recorded a higher reproductive potential in Sweden (2.2 juv/$) and Kurt (1968) lower in Switzerland (1.69), Stubbe (1979) in the German Democratic Republic (1.70), Szederjei (1971) in Hungary (1.55) and Fruziński and Łabudzki (1982) in western Poland (1.56). The opinion put forward by Szederjei (1971), that the value of potential reproductivity depends on habitat conditions in which the roe deer populations live, would appear correct.…”

Section: Discussionmentioning

confidence: 99%

“…In the German Democratic Republic from 1968-1970 realized production was from 0.7-0.82 per female (Stubbe & Passarge, 1979). According to Kurt (1968) the average realized production during the autumn period per female was 0.95 young, while Fruziński & Ła-budzki (1982) estimated realized production in a population of forest roe deer on a similar level. When examining, inter alia, realized production, by means of complete elimination, by shooting of roe deer in one of the shelterbelts in the Czempiń experimental area (Pielowski & Bresiński, 1982), the index of realized production was identical to that obtained in this study, i.e.…”

Section: Discussionmentioning

confidence: 99%

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Dynamics and structure of a field roe deer population

Kałuziński¹

1982

Acta Theriol.

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1Jan KAŁUZIlŚrSKI Kałuziński J., 1982: Dynamics and structure of a field roe deer population. Acta theriol., 27, 27: 385-408 [With 9 Tables & 10 Figs.l The purpose of these studies was to obtain data on variations in numbers, reproduction, mortality, survival and age and sex structure. The data were collected over a period of 14 years, and using them as a basis a quantitative balance was drawn up for a population living in an agrocenosis. Average density of roe deer was 7 individuals/100 ha, and the number born was 1.9 young per female. Natural mortality among young roe deer was high (56% of the number born) and distinctly influences effective production, the average value for which is 0.8 juv/female. Mortality among adult animals was on an average 21%, varying from 7-51% of the spring numbers from the precedingyear. In years which prove catastrophic for the population about 50°/o of the roe deer die during the first year of life. Average length of life of an individual was 3.5 years. Females predominated over males throughout the whole study period (56:44). Game shooting refered first of all to animals from 0-7 years old from the population, and applies to 89% of males and 84% of females. Population numbers were determined by mortality among young and adult animals and by constant game shooting of about 8.1%, and apart from catastrophic years exhibits a tendency to increase. Losses due to game shooting and average natural losses were effectively replenished in the study population.

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Fawn birthdays: From opportunistically sampled fawn rescue data to true wildlife demographic parameters

Kauffert

Baur

Matiu

et al. 2023

Ecol Sol and Evidence

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Spring mowing in May and June is one of the main causes of mortality of roe deer fawns in agricultural regions. Knowing the exact birth distribution of fawns is important to guide farmers in their pre‐mowing precautions to avoid fawn deaths. Wildlife volunteers searching fields prior to mowing can act as citizen scientists by producing data sets of rescued fawns and their approximate age at find. However, due to weather‐dependent searches, the corresponding birth distributions can be highly skewed. We simulated virtual field data to examine the shortcomings of such data sources and introduced two algorithms for reconstructing reliable birth distribution parameters (mean and standard deviation) based on skewed samples. We found that weather‐dependent search data biased the calculated means and standard deviations by up to 14 and 5 days, respectively. However, the use of the proposed advanced algorithms (Grid Search and Machine Learning) resulted in better estimates of the sample means and standard deviations by reducing the root‐mean‐square error by 65% and 80% respectively. Furthermore, the Grid Search algorithm was able to capture birth distribution parameters based on real citizen science data in Bavaria, Germany, from 2021, which are close to the results of more systematic samples of the same year. The simulation exercise highlighted the shortcomings and discrepancies of using non‐probabilistic samples, for example on the occasion of mowing activities, to study demographic parameters compared to the true simulated distribution. Yet, the proposed algorithms can address these drawbacks and potentially turn citizen science data into an important data source for wildlife studies. This could ultimately help reduce wildlife losses during the mowing season by better knowing the distribution of births in a region.

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Zusammenhänge zwischen Verhalten und Fortpflanzungsleistung beim Reh (Capreolus capreolus L.)

Cited by 9 publications

References 1 publication

Breeding strategies and genetic variation in European roe deer Capreolus capreolus populations

Breeding strategies and genetic variation in European roe deer Capreolus capreolus populations

Dynamics and structure of a field roe deer population

Fawn birthdays: From opportunistically sampled fawn rescue data to true wildlife demographic parameters

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