Zoo Biology最新文献_第4页

A Portable Fluid Administration System for Prolonged Intravenous Fluid Administration in Subadult and Adult White Rhinoceroses (Ceratotherium simum). 用于亚成体和成年白犀牛（Ceratotherium simum）长时间静脉输液的便携式输液系统。

IF 1.2 4区生物学

Zoo Biology Pub Date : 2024-11-01 Epub Date: 2024-09-04 DOI: 10.1002/zoo.21860

Marion Leiberich, Emma Hooijberg, Bill van Heerden, Leith Meyer

{"title":"A Portable Fluid Administration System for Prolonged Intravenous Fluid Administration in Subadult and Adult White Rhinoceroses (Ceratotherium simum).","authors":"Marion Leiberich, Emma Hooijberg, Bill van Heerden, Leith Meyer","doi":"10.1002/zoo.21860","DOIUrl":"10.1002/zoo.21860","url":null,"abstract":"While translocations of white rhinoceroses have become an important conservation tool, dehydration during long-distance transports has been identified as a welfare concern. Intravenous (iv) fluid administration might therefore be useful to mitigate dehydration; however, special requirements need to be met to make iv fluid administration suitable for large, wild rhinoceroses during transport. Requirements include a portable and robust system that is capable of delivering high flow rates, is easy to set up, and remains patent and operating for long periods of time while allowing the animals to freely stand or lay down in the transport crates. Due to the lack of suitable fluid administration systems, we developed a custom-made system consisting of 8 L drip bags, a three-part, 4.4-m-long, large bore and partially coiled administration set, and a robust, battery-operated infusion pump, which allowed us to successfully administer iv fluids at a maintenance rate of 1-2 mL/kg/h to eight rhinoceroses for 24 h during a mock transport. While iv fluid administration in transported rhinoceroses is time intensive and the large amount of drip bags required during lengthy transports might pose a limitation, the developed system may be useful for the long-distance transport of small groups of rhinoceroses. Furthermore, this system would be of value for injured or sick rhinoceroses, which require parenteral fluid therapy when commercially available infusion pumps cannot provide the large fluid volumes needed.","PeriodicalId":24035,"journal":{"name":"Zoo Biology","volume":" ","pages":"595-600"},"PeriodicalIF":1.2,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11624622/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142126855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Use of Gonadotropin Releasing Hormone to Manage Intraspecific Agonism in a Coalition of Male Lions (Panthera leo). 使用促性腺激素释放激素管理雄狮联盟中的种内激动。

IF 1.2 4区生物学

Zoo Biology Pub Date : 2024-11-01 Epub Date: 2024-09-05 DOI: 10.1002/zoo.21863

Stacie L Picone, Wilson C Sherman, Ryan A Sadler, Nathaniel R France, Alex Herman, Colleen Kinzley, Darren E Minier

{"title":"The Use of Gonadotropin Releasing Hormone to Manage Intraspecific Agonism in a Coalition of Male Lions (Panthera leo).","authors":"Stacie L Picone, Wilson C Sherman, Ryan A Sadler, Nathaniel R France, Alex Herman, Colleen Kinzley, Darren E Minier","doi":"10.1002/zoo.21863","DOIUrl":"10.1002/zoo.21863","url":null,"abstract":"While housing nonbreeding all-male social groups of African lion (panthera leo) is a necessary part of managing this polygynous species ex situ, resulting intraspecific agonistic behavior can negatively impact animal welfare and guest experience, undermining two primary objectives of modern zoological gardens. Improvest is a gonadotropin releasing factor analog-diphtheria toxoid conjugate marketed for temporary immunological castration which has proven successful in reducing aggression in other zoo-housed species. To the authors' knowledge, the use of this technique has not been described in male African lions; reticence to use GnRH agonists may stem from concern about phenotypic effects (mane loss) and zoo visitor perception. We describe the use of Improvest in conjunction with other management changes to manage agonism in a coalition of African lions (3.0) housed at the Oakland Zoo. Daily agonism scores were calculated via animal care staff records, fecal testosterone levels were measured, and monthly photos were taken to monitor phenotypic changes. While agonism scores varied seasonally in three pretreatment years, a significant (p < 0.05) reduction in the frequency of agonistic behavior began within 2 months of initial treatment. Two lions showed testosterone suppression within 2 months of receiving the first vaccine, while the third showed suppression beginning in the period 4 months after the first vaccine. Mane loss occurred in all three lions, and time to mane regrowth varied between individuals. Improvest, combined with other management strategies, decreased overall fecal testosterone and intraspecific agonism in these lions, and may be an effective tool in other male coalitions.","PeriodicalId":24035,"journal":{"name":"Zoo Biology","volume":" ","pages":"520-536"},"PeriodicalIF":1.2,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142133997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Facultative Parthenogenesis in a Zoo-Held Northern Water Snake, Nerodia sipedon. 动物园饲养的北方水蛇（Nerodia sipedon）的兼性孤雌生殖。

IF 1.2 4区生物学

Zoo Biology Pub Date : 2024-11-01 Epub Date: 2024-09-05 DOI: 10.1002/zoo.21861

Warren Booth, Brenna A Levine, Craig S Berg, Gordon W Schuett

{"title":"Facultative Parthenogenesis in a Zoo-Held Northern Water Snake, Nerodia sipedon.","authors":"Warren Booth, Brenna A Levine, Craig S Berg, Gordon W Schuett","doi":"10.1002/zoo.21861","DOIUrl":"10.1002/zoo.21861","url":null,"abstract":"Over the past several decades, facultative parthenogenesis (FP)-the ability of a sexually reproducing species to reproduce asexually-in vertebrates has been removed from the realm of obscurity and placed firmly in a position where it warrants focused scientific attention. Likely fueled by increased recognition of the trait, the availability of molecular tools capable of disentangling FP from long-term sperm storage, and the availability of potential cases originating from both zoological and private collections, a wealth of papers has been published revealing the diversity of vertebrate systems in which FP occurs. Specifically, cases have been reported in squamate reptiles (lizards and snakes), crocodiles, birds, and elasmobranch fishes (sharks, rays, and skates). Nonetheless, gaps remain in species documentation, and it is important to analyze and report on new cases. In this paper, we provide a DNA-based analysis confirming FP in a zoo-maintained northern water snake, Nerodia sipedon, a viviparous natricine species that is common and widely distributed in North America. Additionally, we provide information on the sexual development and health of the male parthenogen. Encouragingly, zoological institutions, aquaria, university laboratories, and private collections continue to be rich sources for the further study and documentation of FP in vertebrate species, advancing our understanding of this reproductive trait.","PeriodicalId":24035,"journal":{"name":"Zoo Biology","volume":" ","pages":"570-574"},"PeriodicalIF":1.2,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142133995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Trends in Reptile Holdings Across UK Zoos: Identification of the Factors Responsible for Declining Numbers of Venomous Snake 英国各动物园饲养爬行动物的趋势：确定导致毒蛇数量下降的因素

IF 1.3 4区生物学

Zoo Biology Pub Date : 2024-09-17 DOI: 10.1002/zoo.21868

Lily Sparrow, Iri Gill, Christopher J. Michaels, Christopher J. Turner

{"title":"Trends in Reptile Holdings Across UK Zoos: Identification of the Factors Responsible for Declining Numbers of Venomous Snake","authors":"Lily Sparrow, Iri Gill, Christopher J. Michaels, Christopher J. Turner","doi":"10.1002/zoo.21868","DOIUrl":"https://doi.org/10.1002/zoo.21868","url":null,"abstract":"Zoos are under increasing pressure to strategically manage their collections to maximize visitor attendance, financial income, and their contribution to conservation. As a result, the compositions of zoo collections are undergoing significant changes. Many zoos are keeping fewer species and prioritizing keeping large flagship animals that are more attractive to the public. To understand the effects these changes are having on captive reptile numbers, we have analyzed the trends in reptile holdings between 2003 and 2023 at UK zoos. Our findings show that despite an overall increase in reptile numbers in the period analyzed, there has been a dramatic decline in the number of venomous snakes held at UK zoos, and as a result, venomous snakes are being excluded from many of the conservation benefits that zoos provide. To understand the key factors contributing to the decline in venomous snake numbers, 57 staff members across 35 different BIAZA–accredited zoos were surveyed. Results from the survey identified that a perceived increased risk of harm, increasingly stringent health and safety regulations, and increased husbandry requirements were all key contributing factors to why venomous snake numbers at zoos are in decline.","PeriodicalId":24035,"journal":{"name":"Zoo Biology","volume":"37 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142260916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Elephant Gestation: Insights Into Idiopathic Abortions and Stillbirth 大象妊娠：对特发性流产和死胎的见解

IF 1.3 4区生物学

Zoo Biology Pub Date : 2024-09-11 DOI: 10.1002/zoo.21867

Tim E. R. G. Huijsmans, Ann Van Soom, Katrien Smits, Jella Wauters, David Hagan, Thomas B. Hildebrandt

{"title":"Elephant Gestation: Insights Into Idiopathic Abortions and Stillbirth","authors":"Tim E. R. G. Huijsmans, Ann Van Soom, Katrien Smits, Jella Wauters, David Hagan, Thomas B. Hildebrandt","doi":"10.1002/zoo.21867","DOIUrl":"https://doi.org/10.1002/zoo.21867","url":null,"abstract":"The declining African and Asian elephant populations emphasize the importance of a backup population. Successful reproduction in captivity plays a key role in maintaining such a genetically diverse ex situ population but is challenged by reproductive loss in the form of abortions and stillbirths. The elephants’ biphasic prolactin pattern led us to predict a higher incidence of abortions during the time of reduced prolactin concentrations. Therefore, this study focuses on the identification of months during elephant gestation which are prone to loss of pregnancy. A metric was developed to identify the fetal age of aborted calves based on the fetal mass using a regression model. Data on idiopathic abortions in captive and wild elephants collected from zoos, tourist camps, semi‐captive, and free‐ranging populations since 1974 were analyzed, revealing a significantly higher prevalence of abortions during the 15th and 17th month of gestation. Additionally, the prevalence of stillbirths in the 22nd month of gestation between 2000 and 2023 was assessed. Although stillbirths showed a declining trend over time, the average prevalence between 2019 and 2023 was still 2.8%. Consequently, the 15th, 17th, and 22nd month of gestation were identified as stages prone to pregnancy loss. These findings underscore the necessity of researching risk factors and preventative measures for pregnancy loss in these 3 months, especially exploring a possible link with prolactin during the 15th and 17th month of gestation. The identification of stages prone to fetal loss is a key step towards enhancing elephant reproductive success and welfare.","PeriodicalId":24035,"journal":{"name":"Zoo Biology","volume":"73 1","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142212172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A preliminary global investigation into potential impacts on successful captive breeding for two species of Rhyticeros hornbill. 对两种犀鸟成功人工繁殖的潜在影响进行全球初步调查。

IF 1.2 4区生物学

Zoo Biology Pub Date : 2024-09-01 Epub Date: 2024-06-14 DOI: 10.1002/zoo.21846

Kees Groot, James E Brereton, Catherine E King, Paul Rose

{"title":"A preliminary global investigation into potential impacts on successful captive breeding for two species of Rhyticeros hornbill.","authors":"Kees Groot, James E Brereton, Catherine E King, Paul Rose","doi":"10.1002/zoo.21846","DOIUrl":"10.1002/zoo.21846","url":null,"abstract":"Asian hornbills have limited ex situ breeding success, yet these species are some of the most threatened of birds, in need of managed breeding programs. To optimize breeding and increase the sustainability of such populations, it is necessary to assess and improve their husbandry and welfare. Evidence to improve reproduction can be gathered through global husbandry surveys. A survey was sent out to all European Association of Zoos and Aquaria and Association of Zoos and Aquarium holders of the wreathed hornbill (Rhyticeros undulatus) and Papuan hornbill (R. plicatus) to determine predictors for ex situ breeding success. This research found that pairs that have spent more years together (p = .016) and that adding additional proteins to the diet (p = .006) are two significant predictors of breeding success for wreathed- and Papuan hornbill pairs. This paper found a general trend that successful hornbill pairs prefer nest boxes that are situated outside (p = .054). The behaviors of calling to each other and sitting in close proximity showed a general trend and were observed more frequently in successful pairs and, therefore, could be good indicators of bonded pairs. We recommend that ex situ institutions allow their hornbill pairs time to form strong bonds, and that pair compatibility is monitored regularly to ensure that such interactions are positive and not consistently negative. An increase in the percentage of dietary proteins, prior and during the breeding season appears to stimulate pairs to breed. If the management and husbandry alterations presented in this study are implemented, the sustainability of Rhyticeros hornbill populations may be enhanced.","PeriodicalId":24035,"journal":{"name":"Zoo Biology","volume":" ","pages":"405-415"},"PeriodicalIF":1.2,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141318498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Moving Toward Evidence-Based Care: Measuring Preferences in Zoo-Housed Aquatic Turtles Using 24-h Remote Monitoring. 迈向循证护理：利用 24 小时远程监控测量动物园饲养的水龟的偏好。

IF 1.2 4区生物学

Zoo Biology Pub Date : 2024-09-01 Epub Date: 2024-09-05 DOI: 10.1002/zoo.21856

Shannon L O'Brien, Spencer Koenig, Katherine A Cronin

{"title":"Moving Toward Evidence-Based Care: Measuring Preferences in Zoo-Housed Aquatic Turtles Using 24-h Remote Monitoring.","authors":"Shannon L O'Brien, Spencer Koenig, Katherine A Cronin","doi":"10.1002/zoo.21856","DOIUrl":"10.1002/zoo.21856","url":null,"abstract":"Providing evidence-based care to animals is a common goal in zoos and aquariums. However, there are many understudied species with a lack of information available, which may result in suboptimal care for individuals of these species. Using preference tests to ask individual animals what they want can be an effective means to enhance their care, and subsequently, their welfare. Using 24-h remote monitoring, we assessed substrate, enclosure feature, and lighting preferences of five aquatic turtles (two wood turtles, one Blanding's turtle, and two spotted turtles) that share an indoor enclosure at Lincoln Park Zoo. In addition, we compared enclosure feature and lighting preferences between winter and summer to determine whether the turtles had changing seasonal preferences despite being housed indoors. We found that the wood turtles and Blanding's turtle had substrate preferences, whereas the spotted turtles did not. In addition, we found that the turtles' enclosure feature preferences were consistent between winter and summer, but the amount of time spent on land, logs, and in water varied by individual. Finally, we found that the turtles utilized areas with ambient lighting more than areas with a heat lamp or UV lamp; this was consistent between winter and summer. The turtle preferences observed in this study can contribute to the development of care strategies that support their welfare and, in turn, may inspire similar preference studies at other institutions as we collectively advance toward providing animals of all taxonomic groups with evidence-based care.","PeriodicalId":24035,"journal":{"name":"Zoo Biology","volume":" ","pages":"491-498"},"PeriodicalIF":1.2,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142133996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nest quality predicts the probability of egg loss in the critically endangered 'Alalā (Corvus hawaiiensis). 巢的质量可预测极度濒危的 "阿拉拉"（Corvus hawaiiensis）的失卵概率。

IF 1.2 4区生物学

Zoo Biology Pub Date : 2024-09-01 Epub Date: 2024-08-22 DOI: 10.1002/zoo.21849

Lisa L K Mason, Bryce Masuda, Ronald R Swaisgood, Alison M Flanagan

{"title":"Nest quality predicts the probability of egg loss in the critically endangered 'Alalā (Corvus hawaiiensis).","authors":"Lisa L K Mason, Bryce Masuda, Ronald R Swaisgood, Alison M Flanagan","doi":"10.1002/zoo.21849","DOIUrl":"10.1002/zoo.21849","url":null,"abstract":"Conservation breeding programs for endangered species face challenges, notably in the development of husbandry techniques, complicated by the impracticality of conducting controlled experiments. To reduce uncertainty regarding what works in conservation breeding programs, it is essential to capture data. In avian breeding programs, the construction of quality nests and appropriate incubation and handling of eggs by the parents are essential prerequisites to the successful production of offspring. Here, we study factors influencing nest-building and parental incubation outcomes in 'alalā (Corvus hawaiiensis), which is extinct in the wild and numbers fewer than 130 individuals in human care. Using parent-incubated egg data from 2018 to 2021 (171 clutches, 55 pairs), we evaluated the role of husbandry factors in determining the quality of nests constructed by 'alalā and the likelihood of nest quality and other social and environmental factors to predict egg loss (breaking, cannibalization, or ejection of an egg from the nest). More than half of all eggs laid failed to reach the hatch date. Nest quality was the most influential predictor of egg loss, with eggs in higher quality nests more likely to reach the hatch date. Male age also influenced egg loss, with very young (3 years old) and older males (⪞12 years old) experiencing more egg loss. Furthermore, the two facilities and two aviary types also differed in the quality of nests 'alalā constructed, indicating that nest-building behavior can be influenced by husbandry practices. These findings reduce uncertainty and provide insights for recommended management interventions to facilitate successful reproduction in human care.","PeriodicalId":24035,"journal":{"name":"Zoo Biology","volume":" ","pages":"481-490"},"PeriodicalIF":1.2,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142018890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evidence for seasonal shift in the reproduction of Aldabra giant tortoises (Aldabrachelys gigantea) in managed care in the Northern hemisphere compared to the natural habitat in the Southern hemisphere. 与南半球的自然栖息地相比，北半球管理照料下的阿尔达布拉巨龟（Aldabrachelys gigantea）繁殖季节性变化的证据。

IF 1.2 4区生物学

Zoo Biology Pub Date : 2024-09-01 Epub Date: 2024-07-08 DOI: 10.1002/zoo.21851

Pia Cigler, Leyla R Davis, Sarah-Lisa Gmür, Marcus Clauss, Jean-Michel Hatt, Stefanie Ohlerth, Gabriela Mastromonaco, Maya Kummrow

{"title":"Evidence for seasonal shift in the reproduction of Aldabra giant tortoises (Aldabrachelys gigantea) in managed care in the Northern hemisphere compared to the natural habitat in the Southern hemisphere.","authors":"Pia Cigler, Leyla R Davis, Sarah-Lisa Gmür, Marcus Clauss, Jean-Michel Hatt, Stefanie Ohlerth, Gabriela Mastromonaco, Maya Kummrow","doi":"10.1002/zoo.21851","DOIUrl":"10.1002/zoo.21851","url":null,"abstract":"Ex situ breeding constitutes an important tool for species conservation; however, many reptile species are not managed sustainably under human care due to poor fecundity in ex situ settings. In this study, we tested whether the translocation of a seasonally reproducing species to a different environment results in decoupling of extrinsic signals and intrinsic conditions. The endocrinological patterns of plasma steroid sex hormones, follicular development, and mating behaviour of two female and two male sexually mature Aldabra tortoises (Aldabrachelys gigantea) in a zoological institution in the Northern hemisphere was aligned with enclosure climate data (mean monthly daylight duration, temperature, and precipitation) and compared with respective hormone patterns of wild individuals and climate conditions in the native habitat on the Aldabra Atoll in the Southern hemisphere. Whereas occurrence of mating behaviour was not considered a limiting factor, lack of ovulation and subsequent follicular atresia was the main reason for the lack of reproductive output. While it was impossible to elucidate the triggering factors of ovulation and the multifactorial complexity of reproduction was not fully addressed, this study indicates suboptimal temperature conditions and relative temporal shifts of interacting external triggers (temperature and photoperiod) in the zoo setting.","PeriodicalId":24035,"journal":{"name":"Zoo Biology","volume":" ","pages":"458-469"},"PeriodicalIF":1.2,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141555542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reproductive potential and implant loss in female hamadryas baboons (Papio hamadryas) previously contracepted with melengestrol acetate contraceptive implants at AZA institutions. 曾在 AZA 机构使用醋酸美伦孕酮避孕植入物避孕的雌性仓鼠（Papio hamadryas）的生殖潜能和植入物丢失情况。

IF 1.2 4区生物学

Zoo Biology Pub Date : 2024-09-01 Epub Date: 2024-07-01 DOI: 10.1002/zoo.21850

Monica M McDonald, Mary K Agnew, Cheryl S Asa, Brandon Simms, Jodi N Wiley, David M Powell

{"title":"Reproductive potential and implant loss in female hamadryas baboons (Papio hamadryas) previously contracepted with melengestrol acetate contraceptive implants at AZA institutions.","authors":"Monica M McDonald, Mary K Agnew, Cheryl S Asa, Brandon Simms, Jodi N Wiley, David M Powell","doi":"10.1002/zoo.21850","DOIUrl":"10.1002/zoo.21850","url":null,"abstract":"Melengestrol acetate (MGA) implants are a progestin-based reversible contraceptive used to manage fertility in animals. MGA implants are recommended for replacement every 2 years; however, reproduction may be suppressed longer if implants are not removed. In this study, we investigated whether the probability of reproducing (pR) differed among nonimplanted females, females with MGA implants removed, and females whose implants were not removed. In addition, since implant loss in hamadryas baboons is a concern, we explored whether female age, institution, implant placement year, implant location, or implant placement type (intramuscular vs. subcutaneous) differed for females whose implants were lost compared to those that were not. The pR differed significantly across all three treatment conditions with the nonimplanted group having the highest pR. The pR plateaued at 63% after 40 months for the implant-removed group compared to 96% after 84 months in the nonimplanted group. There was no reproduction after contraception if implants were not removed (7.83-45.53 months). In the nonimplanted group, pR was significantly higher for older and parous females. In terms of implant loss, we found that implant placement type was significantly associated with implant loss, such that there were fewer losses when implants were placed intramuscularly (IM) as compared to subcutaneously. Our results suggest that placing MGA implants IM is likely to reduce loss. When loss is prevented, MGA implants are an effective form of contraception and are reliably reversibly in most individuals when removed. However, if not removed, they can prevent reproduction longer than 2 years.","PeriodicalId":24035,"journal":{"name":"Zoo Biology","volume":" ","pages":"425-434"},"PeriodicalIF":1.2,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141471138","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0