Explore the vast range of titles available.

The Chiricahua leopard frog (Lithobates chiricahuensis) is a threatened species endemic to the southwestern United States and Northern Mexico. Captive breeding programs were established to support reintroduction efforts, yet reproductive output has been lower than needed for recovery of the species. This study aimed to evaluate the effects of captivity on amphibian reproduction by (1) determining if captive, semi‐captive, and wild male L. chiricahuensis produce sperm at similar rates and concentration in response to hormone treatment; and (2) evaluating the quality of sperm obtained over time from these populations. Males from captive, semi‐captive, and wild locations were administered a combination of human chorionic gonadotropin and gonadotropin‐releasing hormone to stimulate sperm production and release. A high percentage of males in the captive (60%), semi‐captive (100%), and wild (95.3%) populations produced sperm following treatment. Sperm quality (forward progressive motility and total sperm motility) did not differ between groups. However, sperm quantity (sperm/ml) differed (p < .05) between populations, with semi‐captive and wild males producing higher concentrations of sperm than captive males. These results suggest that Chiricahua leopard frog sperm quantity, but not quality, may become negatively impacted by long‐term captivity in indoor, controlled settings. The Chiricahua leopard frog (Lithobates chiricahuensis) is a threatened species endemic to the southwestern United States and Northern Mexico. Here, we compare males in captive and semi‐captive breeding programs to populations to wild males. Sperm quantity, but not quality, differs between wild, semi‐captive, and captive male Chiricahua leopard frogs.

South Africa has allowed the commercial captive breeding and trade of African lions ( Panthera leo ) and other large felids since the 1990s. However, publicly available information to quantify the extent and nature of this industry, as well as insight into the diversity of relevant provincial nature conservation statutes, are lacking. Our study reviewed the provincial regulations that govern the captive predator industry in South Africa and used the Promotion of Access to Information Act (PAIA) to obtain records held by the nine provincial departments regulating the captive breeding, keeping, and trade of large felids. The information obtained through the PAIA process was highly inconsistent across provincial borders, demonstrated the absence of standard operating procedures, and highlighted the convoluted and decentralised permitting systems. The research postulates that varying and sometimes conflicting provincial regulations can lead to further exploitation of legal loopholes and unregulated growth of the industry. In addition, provincial resources are inadequate for authorities to carry out their fundamental mandates of nature conservation. Although the PAIA process was challenging, the information received provided valuable insight into the unregulated nature of this industry and demonstrated major concerns in addressing the necessary challenges associated with animal welfare. Furthermore, with more than half of the PAIA requests either refused, rejected or ignored, the true magnitude and nature of South Africa’s commercial captive predator industry cannot be accurately quantified. The evidence from this study supports the notion of transitioning away from the commercial captive predator breeding industry, as intended by the South African government.

The captive breeding of wildlife for commercial purposes is a controversial issue. In South Africa, the farming of African lions ( Panthera leo ) for commercial trade emerged in the early 1990s, partly as a conservation measure to reduce the decline in wild lion numbers while meeting increasing wildlife trade demands. In May 2021, the South African Department of Forestry, Fisheries, and the Environment (DFFE) announced plans to end the captive breeding of lions, keeping of lions in captivity, and the use of captive lions, their parts and derivatives for commercial trade. Here, we examined the commercial captive lion industry from 2017 to 2020 in the Free State province, the heart of the lion breeding industry. We document the extent of the industry and highlight a number of key management issues. Of particular concern were issues with microchip numbers, which are used to follow each registered lion from birth to death through the system and to avoid laundering of wild caught and/or non-registered lions. Of the 4,823 unique microchips that were identified, at least 11% could not be followed through the system. Additionally, a minimum of 199 microchip numbers may have been reused by permit holders, either on captivity, euthanasia, or transport permits, indicating potential non-compliance with the Threatened or Protected Species (TOPS) Regulations. We highlight further areas of concern that warrant additional attention for these types of activities that may cause management issues during the transition period and which may also be relevant for the keeping, breeding, and trading of other TOPS regulated species in South Africa, particularly big cat species.

Captive breeding is often a last resort management option in the conservation of endangered species which can in turn lead to increased risk of inbreeding depression and loss of genetic diversity. Thus, recording breeding events via studbook for the purpose of estimating relatedness, and facilitating mating pair selection to minimize inbreeding, is common practice. However, as founder relatedness is often unknown, loss of genetic variation and inbreeding cannot be entirely avoided. Molecular genotyping is slowly being adopted in captive breeding programs, however achieving sufficient resolution can be challenging in small, low diversity, populations. Here, we evaluate the success of the Vancouver Island marmot (Marmota vancouverensis; VIM; among the worlds most endangered mammals) captive breeding program in preventing inbreeding and maintaining genetic diversity. We explored the use of high-throughput amplicon sequencing of microsatellite regions to assay greater genetic variation in both captive and wild populations than traditional length-based fragment analysis. Contrary to other studies, this method did not considerably increase diversity estimates, suggesting: (1) that the technique does not universally improve resolution, and (2) VIM have exceedingly low diversity. Studbook estimates of pairwise relatedness and inbreeding in the current population were weakly, but positively, correlated to molecular estimates. Thus, current studbooks are moderately effective at predicting genetic similarity when founder relatedness is known. Finally, we found that captive and wild populations did not differ in allelic frequencies, and conservation efforts to maintain diversity have been successful with no significant decrease in diversity over the last three generations.

Background and Research Aims Porcupines are frequently traded in Asia but evidence of this remains undocumented. This study was undertaken to address the dearth of information on porcupine trade dynamics using Malaysia as a case study. Methods To accomplish this, traditional Chinese medicine (TCM) outlets throughout the country were surveyed, the existence of porcupine farms were determined and porcupine seizures in Malaysia from 2011 – 2019 were analysed. Results The data revealed that porcupines are coveted predominantly for bezoars used in TCM and for breeding stock. Porcupine bezoars were found in 90% of TCM outlets surveyed though it is likely that the market consists of genuine and fake products. Porcupine farming appears to be gaining popularity and predominantly caters to a demand for breeding pairs. There were 47 seizures amounting to 110 porcupines of at least three species. Seizures included mostly live animals but also meat and quills. Conclusion The harvesting and consumption of porcupines is legally permitted in Malaysia. However, it is evident that illegal hunting of porcupines is also occurring. Captive breeding is unlikely to reduce poaching of porcupines considering the high value associated with wild-sourced bezoars. Local use is also driving international trade of bezoars particularly from Indonesia. Implications for Conservation Research on porcupine trade dynamics in Southeast Asia is limited. This is a conservation concern particularly as porcupines are valued as commercial commodities. As Asian porcupines face a multitude of synergistic threats (i.e., habitat loss, human conflict and illegal hunting), understanding these cumulative impacts on wild populations is a conservation priority. More research on international trade dynamics is also warranted as it is currently occurring without any regulation or monitoring. Listing porcupines in the Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES) could potentially mitigate this.

African lions ( ) face severe population declines, making captive breeding programs essential for conservation. However, genetic data scarcity in such programs elevates inbreeding risks and threatens genetic diversity. Using next-generation sequencing (NGS), we analyzed genome-wide genetic markers from 10 captive African lions at Xinjiang Tianshan Wildlife Park. We identified high-confidence SNPs, evaluated population structure, and calculated kinship/inbreeding coefficients alongside identity by descent (IBD) and identity by state (IBS) analyses. We identified 5,051,795 high-confidence SNPs. The population contained distinct genetic subgroups. Six lion pairs exhibited elevated kinship coefficients, with one individual showing inbreeding signs. We developed a science-driven breeding program based on population genetic structure, identity by descent (IBD) analysis, and Identity by State (IBS) analysis. This program prioritizes pairings with low kinship while maintaining a balanced ancestral lineage. This study underscores the importance of genomic tools in managing captive populations, offering actionable insights to mitigate inbreeding risks and improve long-term viability. This approach offers a model for optimizing breeding strategies in other endangered species conservation efforts.

A high immediate mortality rate of released animals is an important cause of translocation failure (‘release cost’). Post‐release dispersal (i.e. the movements from the release site to the first breeding site) has recently been identified as another source of local translocation failure. In spite of their potential effects on conservation program outcomes, little is known about the quantitative effects of these two sources of translocation failure and their interactions with environmental factors and management designs. Based on long‐term monitoring data of captive‐bred North African houbara bustards Chlamydotis undulata undulata (hereafter, houbara) over large spatial scales, we investigated the relative effects of release (e.g. release group size, period of release), individual (e.g. sex and body condition) and meteorological (e.g. temperature and rainfall) conditions on post‐release survival (n = 957 individuals) and dispersal (n = 436 individuals). We found that (i) rainfall and ambient air temperature had, respectively, a negative and a positive effect on houbara post‐release dispersal distance; (ii) in interaction with the release period, harsh meteorological conditions had negative impact on the survival of houbara; (iii) density‐dependent processes influenced the pattern of departure from the release site; and (iv) post‐release dispersal distance was male‐biased, as natal dispersal of wild birds (although the dispersal patterns and movements may be influenced by different processes in captive‐bred and in wild birds). Synthesis and applications. Our results demonstrate that post‐release dispersal and mortality costs in translocated species may be mediated by meteorological factors, which in turn can be buffered by the release method. As the consequences of translocation programs on population dynamics depend primarily upon release costs and colonization process, we suggest that their potential interactions with meteorological conditions must be carefully addressed in future programs (i) through monitoring of short‐term post‐release mortality to understand its link with environmental conditions, (ii) by carefully choosing the season of release to minimize exposition of inexperienced individuals to harsh conditions and (iii) by generalizing the use of long‐term weather forecast to adapt release effort and staggering releases over several years to buffer meteorological effects.

Active management is essential to the survival of many threatened species globally. Captive breeding programmes can play an important role in facilitating the supplementation, translocation and reintroduction of wild populations. However, understanding the genetic dynamics within and among wild and captive populations is crucial to the planning and implementation of ex situ management, as adaptive potential is, in part, driven by genetic diversity. Here, we use 14 microsatellite loci and mitochondrial Control Region sequence to examine the population genetics of both wild populations and captive colonies of the endangered warru (the MacDonnell Ranges race of the black-footed rock-wallaby Petrogale lateralis) in central Australia, to understand how historical evolutionary processes have shaped current diversity and ensure effective ex situ management. Whilst microsatellite data reveal significant contemporary differentiation amongst remnant warru populations, evidence of contemporary dispersal and relatively weak isolation by distance, as well as a lack of phylogeographic structure suggests historical connectivity. Genetic diversity within current captive populations is lower than in the wild source populations. Based on our genetic data and ecological observations, we predict outbreeding depression is unlikely and hence make the recommendation that captive populations be managed as one genetic group. This will increase genetic diversity within the captive population and as a result increase the adaptive potential of reintroduced populations. We also identify a new site in the Musgrave Ranges which contains unique alleles but also connectivity with a population 6 km away. This novel genetic diversity could be used as a future source for supplementation.

Translocations have become an essential tool in animal conservation for establishing and maintaining viable populations. Yet, the viability of a population is implicitly based on the individual fitness, that is on the survival and reproduction of individuals. Individual‐based assessments of post‐translocation fitness are challenging in the wild while conservation breeding programs may provide vital insights. Long‐term breeding records of semi‐captive (fenced) small population of the Western Derby eland (Taurotragus derbianus derbianus) running in two fenced reserves in Senegal present a case study. This study shows that transport distance and the individual's age at translocation influence animal post‐translocation survival rates and individual reproductive performance. The most critical period for the antelope's post‐translocation survival was the first 2 years following the event, with higher mortalities reported after long‐distance transport in an ecologically novel environment. The first successful calving of translocated females was postponed by 1 year, but the life‐long reproductive performance was not affected. However, higher calf survival in a habitat similar to that in the wild suggests a non‐negligible effect of the habitat on individual fitness, thus crucial to conservation decisions on translocating threatened species. Conservation translocations are vital, but challenging events for threatened species' individuals that promote population viability. We provide an individual‐based assessment of post‐translocation fitness, that is survival rates and reproductive performance of the critically endangered Western Derby eland in the conservation breeding program in Senegal. We highlight that conservationists may increase the individual post‐translocation fitness by decisions acknowledging ecology, reproductive behaviour and adequate timing of the event, thus to facilitate beneficial outcomes for species conservation.

Arizona pronghorn (Antilocapra americana) population numbers have declined over the last century due to unregulated‐harvest, population fragmentation, urban expansion, and habitat loss. Captive breeding, reintroductions, and translocations have helped to curb decline and boost population numbers of the endangered Sonoran subspecies (A. a. sonoriensis). To assess the effect of on‐going management actions on the Sonoran subspecies, we collected multi‐locus genotype data and performed tests of genetic differentiation and population structure in comparison to the non‐endangered American subspecies (A. a. americana). We provide updated estimates of genetic diversity and relatedness to serve as a benchmark for future management toward further recovery of Sonoran pronghorn. Management actions have upheld distinction between the two subspecies in Arizona and stemmed further genetic diversity loss while avoiding an increase in inbreeding within the captive‐bred Sonoran population. Captive‐breeding of Sonoran pronghorn has maintained genetic diversity and subspecies distinction whilst avoiding increased inbreeding.