Oryx最新文献_第4页

Reptiles and their conservation in south-west Ukraine 乌克兰西南部的爬行动物及其保护

IF 2.7 3区环境科学与生态学

Oryx Pub Date : 2024-01-15 DOI: 10.1017/s0030605323001321

Oleksandra Oskyrko, Roman Lysenko, Daryna Obikhod, Maksym Yakovliev, Oleksandr Haidash

{"title":"Reptiles and their conservation in south-west Ukraine","authors":"Oleksandra Oskyrko, Roman Lysenko, Daryna Obikhod, Maksym Yakovliev, Oleksandr Haidash","doi":"10.1017/s0030605323001321","DOIUrl":"https://doi.org/10.1017/s0030605323001321","url":null,"abstract":"Knowledge of the spatial distribution of reptiles is essential for decision-making in conservation under future climate change scenarios. We present a new compilation of reptile records for Odesa Oblast (i.e. province), south-west Ukraine. We compiled 662 records: 200 from our own research during 2012–2022, 362 from the published literature, 73 from public databases and 27 from museum collections. Fourteen native species of reptile (one species of Emydidae, four of Lacertidae, one of Anguidae, six of Colubridae and two of Viperidae) have been recorded in Odesa Oblast but the distribution of several are poorly known and/or records have rarely been published. We also report four introduced reptile species (one each of Emydidae, Gekkonidae, Lacertidae and Anguidae). We present the data in a grid of 462 10 × 10 km cells covering the oblast. In this compilation we did not record any new species, but our records include previously unreported localities for some species. Species richness was highest in the areas along the Black Sea, in protected areas. The main threats to the reptiles in Odesa Oblast are the alteration and degradation of habitats, military action, uncontrolled pressure from infrastructure projects and the presence of invasive species.","PeriodicalId":19694,"journal":{"name":"Oryx","volume":"24 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139470773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reproductive populations of the Critically Endangered bat Phyllonycteris aphylla at two new locations in Jamaica 牙买加两个新地点的极度濒危蝙蝠 Phyllonycteris aphylla 的繁殖种群

IF 2.7 3区环境科学与生态学

Oryx Pub Date : 2024-01-15 DOI: 10.1017/s0030605323001643

Phillip J. Oelbaum, Ronald P. Hall, Damion L. Whyte, Ronald S. Stewart, Jan Pauel, Silvia Kouwenberg, Elizabeth R. Dumont, Kenneth C. Welch

{"title":"Reproductive populations of the Critically Endangered bat Phyllonycteris aphylla at two new locations in Jamaica","authors":"Phillip J. Oelbaum, Ronald P. Hall, Damion L. Whyte, Ronald S. Stewart, Jan Pauel, Silvia Kouwenberg, Elizabeth R. Dumont, Kenneth C. Welch","doi":"10.1017/s0030605323001643","DOIUrl":"https://doi.org/10.1017/s0030605323001643","url":null,"abstract":"The Jamaican flower bat Phyllonycteris aphylla is categorized as Critically Endangered on the IUCN Red List. It is endemic to Jamaica and formerly known only from Stony Hill Cave, where there are an estimated c. 500 individuals. Previously declared extinct twice, its rediscovery in 2010 at Stony Hill Cave marked new hope for the conservation of this important species. Although little is known about its ecology, the species is presumed to be a cave-obligate rooster and to rely exclusively on so-called hot caves, which are defined by high ambient temperatures and low air quality. In March–April 2023, we surveyed bats at seven caves throughout Jamaica. At two of these, Green Grotto Caves, St. Ann, and Rock Spring Caverns, St. Mary, we captured both male and pregnant female P. aphylla. At Green Grotto Caves, we captured 24 P. aphylla, and 66 at Rock Spring Caverns. We believe Rock Spring Caverns to be one of the largest known roosts of P. aphylla. Neither of these sites are hot caves as both are moderated by flowing water, although warmer chambers may be more important to this bat than to other species. Further monitoring of these populations and continued exploration of other potential roosts are vital for the protection of this species.","PeriodicalId":19694,"journal":{"name":"Oryx","volume":"84 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139470608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Two decades of community-based conservation yield valuable insights into marine turtle nesting ecology 二十年的社区保护为海龟筑巢生态学提供了宝贵的见解

IF 2.7 3区环境科学与生态学

Oryx Pub Date : 2024-01-12 DOI: 10.1017/s0030605323001011

Casper H. van de Geer, Annette C. Broderick, Matt I.D. Carter, Athuman Abdallah Irei, Fikiri Kea Kiponda, Joseph Kiptum, Joe Ngunu Wandiga, Mohamed Omar, Nicola Parazzi, Hannah Sawyer-Kerr, Sam B. Weber, Ricardo Zanre, Brendan J. Godley

{"title":"Two decades of community-based conservation yield valuable insights into marine turtle nesting ecology","authors":"Casper H. van de Geer, Annette C. Broderick, Matt I.D. Carter, Athuman Abdallah Irei, Fikiri Kea Kiponda, Joseph Kiptum, Joe Ngunu Wandiga, Mohamed Omar, Nicola Parazzi, Hannah Sawyer-Kerr, Sam B. Weber, Ricardo Zanre, Brendan J. Godley","doi":"10.1017/s0030605323001011","DOIUrl":"https://doi.org/10.1017/s0030605323001011","url":null,"abstract":"For the Western Indian Ocean region, there is a significant knowledge gap regarding marine turtle nesting on the continental coast of East Africa. Here we present results from a long-term (2000–2020) community-based monitoring programme in and around Watamu Marine National Park, Kenya, covering 30 km of coastline (c. 6% of the national total). Conservation actions effectively protected nesting turtles and resulted in a near-total cessation of illegal egg harvesting in Watamu Marine National Park. Collected data indicate this is an important marine turtle nesting index site in Kenya and the wider region. Green turtle Chelonia mydas nests were most common (95%), followed by olive ridley turtles Lepidochelys olivacea (4%), with occasional nests of hawksbill Eretmochelys imbricata and leatherback turtles Dermochelys coriacea. Clutches per season increased significantly over the 20-year monitoring period for green turtles (50%) and showed a positive trend for olive ridley turtles. Watamu remains an area at risk from human pressures such as coastal development. Clutch distribution along the Watamu Marine National Park beach has shifted over time, probably because of coastal development and disturbance. Illegal take of adults and eggs continues in areas north and south of the Watamu Marine National Park, possibly slowing rates of recovery. Clutches deemed at risk were moved to a safe location within the National Park, and hatching success was high. Continued conservation efforts, including wider engagement with stakeholders to reduce human pressures, are needed to ensure the perpetuation of this nesting site.","PeriodicalId":19694,"journal":{"name":"Oryx","volume":"54 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139462242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A systematic survey of online trade in the caterpillar fungus Ophiocordyceps sinensis 对中华麦角菌网上交易的系统调查

IF 2.7 3区环境科学与生态学

Oryx Pub Date : 2024-01-10 DOI: 10.1017/s003060532300131x

Reshu Bashyal, David L. Roberts

{"title":"A systematic survey of online trade in the caterpillar fungus Ophiocordyceps sinensis","authors":"Reshu Bashyal, David L. Roberts","doi":"10.1017/s003060532300131x","DOIUrl":"https://doi.org/10.1017/s003060532300131x","url":null,"abstract":"Although wildlife trade has received considerable research and conservation attention, much of it has been focused on charismatic species, with taxa such as fungi receiving little or no attention despite being highly sought after. The caterpillar fungus Ophiocordyceps sinensis is highly valued as an ingredient in cosmetics and medicines, and as an aphrodisiac and dietary supplement. Despite its livelihood and socio-economic significance, it has received little attention in either research or wildlife trade policy. Nevertheless, trade appears to be rampant, and growing online, and this is an emerging conservation challenge. Here we present a systematic survey of online trade in the caterpillar fungus during 2021. During this period, 168 advertisements were recorded on eight e-commerce platforms, both national and international. The grade of the caterpillar fungus advertised for sale fell into six categories. Fungi described as pure/organic/wild grade, which we categorized as authentic grade, had the highest median price (24 USD/g) and those described as medicine/food/cosmetic/beverage, which we categorized as consumption grade, had the lowest median price (0.04 USD/g). The highest advertised sale price was for caterpillar fungus of Bhutan origin (155 USD/g) advertised on the eBay e-commerce platform. Trade in caterpillar fungus on national and international online platforms is evident, and trade in other non-charismatic species is also likely burgeoning online but remains poorly documented. Further systematic surveys of online trade are required, not only to improve understanding of such trade but also to facilitate the development of effective conservation interventions and prevent undocumented overexploitation of important natural resources in developing countries.","PeriodicalId":19694,"journal":{"name":"Oryx","volume":"83 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139413290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Searching for spots: a comprehensive survey for the Arabian leopard Panthera pardus nimr in Saudi Arabia – CORRIGENDUM 寻找斑点：沙特阿拉伯阿拉伯豹 Panthera pardus nimr 的全面调查 - CORRIGENDUM

IF 2.7 3区环境科学与生态学

Oryx Pub Date : 2024-01-10 DOI: 10.1017/s0030605323001813

Carolyn E. Dunford, J. P. B. Faure, Michael D. Ross, J. A. Spalton, Marine Drouilly, Kai J.P. Pryce-Fitchen, Ross De Bruin, Alexander E. Botha, Abdullah Alshehri, Nikki Le Roex, Guy Balme, Ahmed Almalki, Emma Gallacher, Mesfer Alhlafi, Saleh Alaamri, David R. Mills, Gareth Mann

引用次数: 0

Status of the Critically Endangered gharial Gavialis gangeticus in the upper Ghaghara River, India, and its conservation in the Girwa–Ghaghara Rivers 印度 Ghaghara 河上游极度濒危 gharial Gavialis gangeticus 的现状及其在 Girwa-Ghaghara 河的保护工作

IF 2.7 3区环境科学与生态学

Oryx Pub Date : 2023-12-22 DOI: 10.1017/s0030605323001485

Gaurav Vashistha, Vivek Ranjan, Devvrat Singh, Shantanu S. Ugemuge, Akash Deep Badhawan, Pulkit Gupta

{"title":"Status of the Critically Endangered gharial Gavialis gangeticus in the upper Ghaghara River, India, and its conservation in the Girwa–Ghaghara Rivers","authors":"Gaurav Vashistha, Vivek Ranjan, Devvrat Singh, Shantanu S. Ugemuge, Akash Deep Badhawan, Pulkit Gupta","doi":"10.1017/s0030605323001485","DOIUrl":"https://doi.org/10.1017/s0030605323001485","url":null,"abstract":"\u0000 The gharial Gavialis gangeticus is a Critically Endangered crocodilian endemic to the Indian subcontinent. Habitat modification by river damming and water extraction has caused a severe decline in its population. The status of the gharial is known within protected areas, but there have been few surveys for this species in unprotected areas. In Katerniaghat Wildlife Sanctuary, a breeding gharial population in Girijapuri Barrage Reservoir has low recruitment, and it has been hypothesized that yearlings disperse downstream into the unprotected Ghaghara River when the barrage gates are opened. We surveyed a 100-km stretch of the Ghaghara River from the Girijapuri Barrage to Chahlari Ghat, observing a total of 84 gharials, including a high proportion of juveniles. A survey in 2021 from Chahlari Ghat to Ayodhya observed 174 gharials, giving a combined total of 258 gharials in a 219-km stretch of the Ghaghara River for the two surveys. Together, these findings confirm the presence of a significant population of gharials in the Ghaghara River. We recommend the adoption of an integrated approach, involving government agencies and local communities along the river, to conserve the protected Girwa–Kaudiyala Rivers and the unprotected Ghaghara River for gharial conservation and recovery. Such a programme will need to tackle the threats facing the gharial and establish baseline data and long-term monitoring protocols for freshwater species conservation in this river system.","PeriodicalId":19694,"journal":{"name":"Oryx","volume":"19 4","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138947498","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cheetahs in Tanzania's Selous–Nyerere ecosystem: lack of evidence for current persistence, and reflections on historical status 坦桑尼亚塞卢斯-尼雷尔生态系统中的猎豹：缺乏当前持续存在的证据，以及对历史状况的反思

IF 2.7 3区环境科学与生态学

Oryx Pub Date : 2023-12-15 DOI: 10.1017/s0030605323001424

Charlotte E. Searle, Paolo Strampelli, Leonard Haule, Singira N. Parsais, Kandey Olesyapa, Nasri Dadi Salum, Dennis Ikanda, Samuel Mtoka, Germanus Hape, Daniel Mathayo, Manase Elisa, Alex L. Lobora, Amy J. Dickman

{"title":"Cheetahs in Tanzania's Selous–Nyerere ecosystem: lack of evidence for current persistence, and reflections on historical status","authors":"Charlotte E. Searle, Paolo Strampelli, Leonard Haule, Singira N. Parsais, Kandey Olesyapa, Nasri Dadi Salum, Dennis Ikanda, Samuel Mtoka, Germanus Hape, Daniel Mathayo, Manase Elisa, Alex L. Lobora, Amy J. Dickman","doi":"10.1017/s0030605323001424","DOIUrl":"https://doi.org/10.1017/s0030605323001424","url":null,"abstract":"The cheetah Acinonyx jubatus has suffered considerable range contractions in recent decades. Despite the importance of up-to-date information on distribution to guide conservation, such information is lacking for large areas within the species’ remaining potential range. In Tanzania, the largest tract of potential cheetah habitat without such data is the Selous–Nyerere ecosystem. Although the cheetah is considered possibly extant in this landscape, the last confirmed sighting was in the late 1990s. During 2020–2022, we carried out sign-based (spoor) and camera-trap surveys across Selous Game Reserve and Nyerere National Park. We did not record any evidence of cheetah presence, and opportunistic enquiries with tourism operators and protected area management staff did not provide any evidence of current or recent presence. Our findings suggest that current cheetah presence is unlikely, and that Selous–Nyerere should not be treated as potential contemporary cheetah range. We discuss the possibility that Selous–Nyerere may have never hosted a resident cheetah population, and was either occasionally occupied by dispersers from other populations or represented the edge of populations that spanned areas now treated as corridors.","PeriodicalId":19694,"journal":{"name":"Oryx","volume":"6 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138685367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Living with leopards: an assessment of conflict and people's attitudes towards the common leopard Panthera pardus in a protected area in the Indian Himalayan region 与豹共处：印度喜马拉雅地区一个保护区内的冲突评估以及人们对普通豹的态度

IF 2.7 3区环境科学与生态学

Oryx Pub Date : 2023-12-14 DOI: 10.1017/s0030605323001278

Muzaffar A. Kichloo, Asha Sohil, Neeraj Sharma

{"title":"Living with leopards: an assessment of conflict and people's attitudes towards the common leopard Panthera pardus in a protected area in the Indian Himalayan region","authors":"Muzaffar A. Kichloo, Asha Sohil, Neeraj Sharma","doi":"10.1017/s0030605323001278","DOIUrl":"https://doi.org/10.1017/s0030605323001278","url":null,"abstract":"Protected areas are important for wildlife conservation but they are also used by many local communities for livelihood activities. This often leads to conflicts and erodes the tolerance of local people for wildlife, particularly towards carnivores that prey on livestock. To enhance conservation success and improve the social carrying capacity of carnivores, it is essential to understand the factors influencing such conflicts and the attitudes of people interacting with carnivores. We used structured questionnaire surveys to assess the extent of livestock mortality and community responses to common leopards Panthera pardus in Kishtwar National Park, a relatively understudied protected area in the Greater Himalayan region of India. The mountainous Park and its surroundings have historically served as a haven for the local agro-pastoralists and transhumant pastoralists, resulting in complex human–wildlife interactions across the larger landscape. Our results showed that leopards were responsible for high livestock depredation (71 incidents in 2 years), and households with larger livestock holdings experienced a higher predation rate compared to those with smaller livestock holdings. An ordinal logistic regression model revealed that respondents’ age and period of activity in the Park significantly influenced their opinions regarding leopards. Large losses suffered by otherwise low-income households resulted in more negative attitudes towards these predators. Our study indicates that financial compensation for livestock losses is a key factor in improving human–leopard coexistence. A comprehensive, cross-sector collaborative approach would help to improve conflict resolution and promote favourable attitudes towards these predators.","PeriodicalId":19694,"journal":{"name":"Oryx","volume":"11 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138629495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Genetic insights to assist management of the Critically Endangered hangul Cervus hanglu hanglu in the Kashmir Himalaya 遗传学见解有助于克什米尔喜马拉雅山极度濒危的杭鹿（Cervus hanglu hanglu）的管理

IF 2.7 3区环境科学与生态学

Oryx Pub Date : 2023-12-13 DOI: 10.1017/s0030605323001266

Sneha Narayan, Tanushree Srivastava, Gayathri Sreedharan, Bapin K. Panda, Javaid Hameed, Karthikeyan Vasudevan, P. Anuradha Reddy

{"title":"Genetic insights to assist management of the Critically Endangered hangul Cervus hanglu hanglu in the Kashmir Himalaya","authors":"Sneha Narayan, Tanushree Srivastava, Gayathri Sreedharan, Bapin K. Panda, Javaid Hameed, Karthikeyan Vasudevan, P. Anuradha Reddy","doi":"10.1017/s0030605323001266","DOIUrl":"https://doi.org/10.1017/s0030605323001266","url":null,"abstract":"The hangul Cervus hanglu hanglu, a Critically Endangered mountain ungulate of Jammu and Kashmir, India, faces the imminent threat of population loss and extinction. Effective management of its largest viable population in Dachigam National Park in the Kashmir Himalaya requires reliable demographic information. Using 14 microsatellite markers we identified 293 individuals (208 females and 85 males) through faecal analysis, and generated data on the genetic status and population size of the hangul in its winter habitat. The mean expected and observed heterozygosities of 0.62 and 0.59 are comparable to those of several red deer Cervus elaphus populations elsewhere. The effective population sizes were 46.3 and 93.7 when the frequencies of rare alleles were considered to be 0.050 and 0.010, respectively. The average mean kinship of the population was 0.34, and there was no evidence of a recent bottleneck event. In genetic mark–recapture analysis the best model included an effect of sex on both detection and recapture probabilities. Detection of males was highest in November, coinciding with the hangul breeding season, whereas detection of females was highest in December. Our estimate of the hangul population using genetic mark–recapture with bootstrapping was 394 individuals. To our knowledge, this is the first study to use genetic data to estimate the population of the hangul. It will guide future studies of this subspecies and also serve as an impetus for identifying founder animals for captive breeding, and for connecting the population in Dachigam National Park with the other small, isolated populations to ensure the long-term survival of this subspecies.","PeriodicalId":19694,"journal":{"name":"Oryx","volume":"27 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138581113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Release trial of captive-bred variable harlequin frogs Atelopus varius shows that frogs disperse rapidly, are difficult to recapture and do not readily regain skin toxicity 对人工饲养的变异箭毒蛙（Atelopus varius）进行的释放试验表明，这种蛙散布迅速，难以重新捕获，而且不容易恢复皮肤毒性

IF 2.7 3区环境科学与生态学

Oryx Pub Date : 2023-12-13 DOI: 10.1017/s0030605323001254

Blake Klocke, Orlando Garcés, Elliot Lassiter, Jorge Guerrel, Andreas Hertz, Estefany Illueca, Eric Klaphake, Luke Linhoff, Kevin Minbiole, Heidi Ross, Julia A. Tasca, Douglas C. Woodhams, Brian Gratwicke, Roberto Ibáñez

{"title":"Release trial of captive-bred variable harlequin frogs Atelopus varius shows that frogs disperse rapidly, are difficult to recapture and do not readily regain skin toxicity","authors":"Blake Klocke, Orlando Garcés, Elliot Lassiter, Jorge Guerrel, Andreas Hertz, Estefany Illueca, Eric Klaphake, Luke Linhoff, Kevin Minbiole, Heidi Ross, Julia A. Tasca, Douglas C. Woodhams, Brian Gratwicke, Roberto Ibáñez","doi":"10.1017/s0030605323001254","DOIUrl":"https://doi.org/10.1017/s0030605323001254","url":null,"abstract":"Variable harlequin frogs Atelopus varius have declined significantly throughout their range as a result of infection with the fungal pathogen Batrachochytrium dendrobatidis (Bd). The Panama Amphibian Rescue and Conservation Project maintains an ex situ population of this Critically Endangered species. We conducted a release trial with surplus captive-bred A. varius individuals to improve our ability to monitor frog populations post-release, observe dispersal patterns after freeing them into the wild and learn about threats to released frogs, as well as to determine whether natural skin toxin defences of frogs could be restored inside mesocosms in the wild and to compare Bd dynamics in natural amphibian communities at the release site vs a non-release site. The 458 released frogs dispersed rapidly and were difficult to re-encounter unless they carried a radio transmitter. No frog was seen after 36 days following release. Thirty frogs were fitted with radio transmitters and only half were trackable by day 10. Tetrodotoxin was not detected in the skins of the frogs inside mesocosms for up to 79 days. Bd loads in other species present at sites were high prior to release and decreased over time in a pattern probably driven by weather. No differences were observed in Bd prevalence between the release and non-release sites. This trial showed that refinements of our methods and approaches are required to study captive Atelopus frogs released into wild conditions. We recommend continuing release trials of captive-bred frogs with post-release monitoring methods, using an adaptive management framework to advance the field of amphibian reintroduction ecology.","PeriodicalId":19694,"journal":{"name":"Oryx","volume":"38 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138581490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0