Efficacy and Cost of GonaCon™ for Population Control in a Free‐ranging White‐tailed Deer Population

2021 ◽  
Author(s):  
Micah J. Walker ◽  
G. Christopher Shank ◽  
Michael K. Stoskopf ◽  
Larry J. Minter ◽  
Christopher S. DePerno
Keyword(s):  
Population Control ◽  
Deer Population ◽  
Free Ranging

scholarly journals Mitigation of bark stripping on spruce: the need for red deer population control

2020 ◽  
Author(s):  
Romain Candaele ◽  
Philippe Lejeune ◽  
Alain Licoppe ◽  
Céline Malengreaux ◽  
Yves Brostaux ◽  
...  
Keyword(s):  
Red Deer ◽  
Population Control ◽  
Bark Stripping ◽  
Deer Population

scholarly journals Positive-reinforcement strategies to reduce capture-stress in Capybaras

2019 ◽  
Vol 41 ◽  
pp. e45819
Author(s):  
Derek Andrew Rosenfield ◽  
Cristiane Schilbach Pizzutto
Keyword(s):  
Positive Reinforcement ◽  
Acute Stress ◽  
Population Control ◽  
Physical Restraint ◽  
Chemical Restraint ◽  
Hydrochoerus Hydrochaeris ◽  
Conditioning Effect ◽  
Capture Stress ◽  
Related Stress ◽  
Free Ranging

Prior to the administration of any anesthetics, capturing the semi-aquatic capybara (Hydrochoerus hydrochaeris) demands physical restraint, which presents immense challenges. Traditional methods, such as lassoing and traps, are prone to induce acute stress, may result in injury, and can even have fatal outcomes. As part of a larger population control project using contraceptive methods, frequent capture-induced stress and injury may directly affect normal reproductive physiology. Thus, choosing a less stress-inducing method was imperative. In this report, we describe methods of conditioning to enable frequent capture and manipulation, using bait as a positive reinforcement associated with a special click-sound, in a free-ranging population of 40 capybaras. The objectives were to attract, herd, and allow capybaras to voluntarily enter a coral. We evaluated the conditioning effect on individual and group behaviors, interpreting vocal and body language manifestations during the processes of conditioning, herding, capture, and recovery (post procedure/chemical restraint), with the aim of minimizing capture-related stress and injuries. Based on our observations, we report that conditioning, used as part of the capture strategies, noticeably facilitated physical restraint and manipulation throughout the procedures, while apparently maintaining the animals’ overall welfare as it relates to conditioning and capture.

scholarly journals Tubectomy of Pregnant and Non-pregnant Female Balinese Macaques (Macaca Fascicularis) With Post-operative Monitoring

2021 ◽  
Vol 8 ◽  
Author(s):  
Stefan Deleuze ◽  
Fany Brotcorne ◽  
Roland Polet ◽  
Gede Soma ◽  
Goulven Rigaux ◽  
...  
Keyword(s):  
Population Control ◽  
Careful Examination ◽  
Gravid Uterus ◽  
Wild Female ◽  
Minimal Invasiveness ◽  
Pregnant Females ◽  
Management Measures ◽  
Reproductive Females ◽  
Free Ranging ◽  
Operative Monitoring

Worldwide, primates, and humans increasingly share habitats and often enter in conflict when primates thrive in human-dominated environments, calling for special management measures. Reproductive control is increasingly used to manage population growth but very few monitoring data are available. Therefore, the efficiency and implications of such programs require a careful examination. In the context of a contraception program in wild female long-tailed macaques in Ubud, Bali, conducted over four successive campaigns between 2017 and 2019, including 140 females (i.e., 41.9% of the reproductive females of the population in 2019), modifications of an endoscopic tubectomy procedure, a permanent sterilization method, clinical evaluation of this method, and the post-operative monitoring results of the neutered females after release are described. This surgical approach was applicable for pregnant females: 28.6% of the treated females were pregnant at the time of the surgery. The procedure used a single lateral port to reach and cauterize both oviducts in non-pregnant as well as in early to mid-term pregnant females. Pregnant females nearer to term required a second lateral port to access both oviducts masked by the size of the gravid uterus. Moreover, bipolar thermocauterization was utilized successfully without resection to realize the tubectomy. The average duration of the laparoscopic surgery was 14 min for non-pregnant females and 22 min for pregnant females. Animals were released 3 h 22 min in average following their capture. This short holding time, recommended for free-ranging primates, was made possible by the minimal invasiveness of the sterilization approach. A laparoscopic post-operative evaluation conducted on two patients during the following campaign confirmed that the oviducts were definitely disrupted and no longer patent. Moreover, no new pregnancies in sterilized females were recorded during the 3-year observation period. The survival rate of the treated females 6 months after sterilization was high (96.3%) with no major post-operative complications clinically recorded. Among females that were pregnant during surgery, 81.1% were confirmed to experience term delivery. This study demonstrates the safety and efficiency of endoscopic tubectomy, even for pregnant females, as a mean of wild macaques' population control.

scholarly journals Browsing Patterns of White-Tailed Deer Following Increased Timber Harvest and a Decline in Population Density

2010 ◽  
Vol 2010 ◽  
pp. 1-7 ◽  
Author(s):  
Shawn M. Crimmins ◽  
John W. Edwards ◽  
W. Mark Ford ◽  
Patrick D. Keyser ◽  
James M. Crum
Keyword(s):  
Population Density ◽  
Odocoileus Virginianus ◽  
Population Control ◽  
Timber Harvest ◽  
Population Densities ◽  
Growth And Survival ◽  
Deer Population ◽  
Mature Forest ◽  
Central Appalachians ◽  
A Site

We examined browsing patterns of white-tailed deer (Odocoileus virginianus) on a site in the central Appalachians that experienced a substantial (>50%) reduction in deer population density and an increase in the amount of timber harvest since 2001. We sampled woody browse in and immediately adjacent to 12 clearcuts ranging in age from 0–5 years postharvest in summer 2007. Clearcut-interior areas had higher woody browse abundance and browsing rates than clearcut-edge or mature forest areas. Woody browse abundance was slightly higher within individual clearcuts than in 2001 at higher population densities and lower timber harvest rates. Overall browsing rates declined from approximately 17% in 2001 to less than 5% during our study, suggesting that the combination of deer population control, and increasing the amount of timber harvest across the landscape can reduce herbivory to levels that may not impede growth and survival of forest vegetation.

Prospects for immunocontraception in feral horse population control: exploring novel targets for an equine fertility vaccine

2016 ◽  
Vol 28 (7) ◽  
pp. 853 ◽  
Author(s):  
Aleona Swegen ◽  
R. John Aitken
Keyword(s):  
Vaccine Development ◽  
Population Control ◽  
Future Research ◽  
Economic Damage ◽  
The Novel ◽  
Horse Population ◽  
Feral Horses ◽  
Feral Horse ◽  
Species Specific ◽  
Free Ranging

Feral horses populate vast land areas and often induce significant ecological and economic damage throughout the landscape. Non-lethal population control methods are considered favourable in light of animal welfare, social and ethical considerations; however, no single effective, safe and species-specific contraceptive agent is currently available for use in free-ranging wild and feral horses. This review explores aspects of equine reproductive physiology that may provide avenues for the development of specific and long-lasting immunocontraceptive vaccines and some of the novel strategies that may be employed to facilitate appropriate antigen discovery in future research. Potential antigen targets pertaining to spermatozoa, the ovary and oocyte, as well as the early conceptus and its associated factors, are reviewed in the context of their suitability for immunocontraceptive vaccine development.

Assessing reproductive patterns and disorders in free-ranging dogs in Jodhpur, India to optimize a population control program

2010 ◽  
Vol 74 (7) ◽  
pp. 1115-1120 ◽  
Author(s):  
Sarah C. Totton ◽  
Alex I. Wandeler ◽  
Cathy J. Gartley ◽  
Subhash Kachhawaha ◽  
Mahesh Suman ◽  
...  
Keyword(s):  
Population Control ◽  
Control Program ◽  
Reproductive Patterns ◽  
Free Ranging

scholarly journals ‘Stray Appetites’: A Socio-Ecological Analysis of Free-Ranging Dogs Living Alongside Human Communities in Bangalore, India

2020 ◽  
Author(s):  
Shireen Jagriti Bhalla ◽  
Roy Kemmers ◽  
Ana Vasques ◽  
Abi Tamim Vanak
Keyword(s):  
Population Size ◽  
Carrying Capacity ◽  
Population Control ◽  
Large Population ◽  
Food Sources ◽  
Effective Population ◽  
Management Options ◽  
Capture Recapture ◽  
Estimate Population Size ◽  
Free Ranging

AbstractAcross the developing world, humans and free-ranging domestic dogs share common spaces. The relationship between these dogs and humans can range from one of dependence, to apathy, to conflict. Given the high number of humans attacked by dogs every year in India, and the lack of an effective population control strategy, we seek to provide insights into the conflict and propose alternative population management options based on reducing the carrying capacity of the environment. We used a mixed methods approach to understand both ecological and sociological underpinnings of free-ranging dog-human relationships in Bangalore, India. We conducted a photographic capture-recapture survey of free-ranging dogs to estimate population size and linked it to the availability of potential food sources. We also conducted a qualitative survey to assess attitudes of residents towards the dog population. We found that dog population varied from 192 to 1888 per square kilometre across a gradient of housing densities. The density of houses, bakeries and garbage piles were significant predictors of dog population size. Crucially, as low as 10 to 18.3% of houses supported the large population of dogs, highlighting the need for residents to act responsibly towards the dogs. Further, we found that garbage, although significant, is a secondary food source to household-maintained dogs. Since on the whole, respondents expressed the desire for a reduction in dog population, we suggest decreasing the carrying capacity of the environment by targeting these three food sources.

The spatio-temporal co-occurrence of free-ranging common fallow deer and domestic caprines on the island of Rhodes, Greece

Mammalia ◽  
2021 ◽  
Vol 85 (3) ◽  
pp. 227-230
Author(s):  
Anna M. De Marinis ◽  
Marco Masseti
Keyword(s):  
Fallow Deer ◽  
Greek Population ◽  
Dama Dama ◽  
Abundance Index ◽  
Deer Population ◽  
The Status ◽  
Spatio Temporal ◽  
Free Ranging ◽  
Genetic Characters ◽  
Over Time

Abstract The Dama dama dama population of the island of Rhodes has an important conservation significance because of its unique genetic characters. Currently, many are the factors that threaten its survival. Aim of this paper is to provide the first data on the spatio-temporal co-occurrence between the only free-ranging Greek population of common fallow deer and local domestic caprines. Kilometric abundance index (KAI) was derived from spotlight counts. The unattended domestic caprines appear to impact on fallow deer, in particular during fawning season. Livestock monitoring over time can act as a proxy indicator of the status of this deer population.

Sign in / Sign up

Export Citation Format

Share Document