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Context. Captive breeding for release back to the wild is an important component of ex situ conservation but requires genetic diversity that is representative of the wild population and has the ultimate goal of producing ecologically sustainable and resilient populations. However, defining and testing for representativeness of captive populations is difficult. Koalas (Phascolarctos cinereus) are bred for educational and tourism purposes in zoos and wildlife parks in South-East Queensland, but there are drastic declines evident in some wild koala populations in this region.
Aim. We compared genetic diversity at microsatellite loci and mitochondrial DNA in two captive koala populations with that of the local, wild koalas of South-East Queensland, determining the degree to which genetic diversity of neutral loci had been preserved and was represented in the captive populations.
Key results. The expected heterozygosity and the allelic richness was significantly greater in one captive colony than one wild South-East Queensland population. There was low but significant differentiation of the captive from wild populations using FST, with greater differentiation described by Jost’s Dest. In contrast, a newly introduced Kullback–Leibler divergence measure, which assesses similarity of allele frequencies, showed no significant divergence of colony and wild populations. The captive koalas lacked many of the mitochondrial haplotypes identified from South-East Queensland koalas and possessed seven other haplotypes.
Conclusions. Captive colonies of koalas have maintained levels of overall neutral genetic diversity similar to wild populations at microsatellite loci and low but significant differentiation likely resulted from drift and founder effects in small captive colonies or declining wild populations. Mitochondrial DNA suggests that captive founders were from a wider geographic source or that haplotypes have been lost locally.
Implications. Overall, tested captive koalas maintain sufficient microsatellite diversity to act as an in situ reservoir for neutral genetic diversity of regional populations.
Context. Given the decline in amphibian populations worldwide, it is essential to build a better understanding of human behaviours that jeopardise their survival. Much of the literature regarding the social–psychological determinants of behaviours related to wildlife has focussed solely on general wildlife beliefs rather than specific attitudes towards a particular species.
Aims. The goal of this study was to assess how individuals’ behavioural intentions towards a rare and little-known species, the hellbender salamander (Cryptobranchus alleganiensis), are influenced by their attitudes towards the animal and their more general beliefs about wildlife.
Methods. Questionnaires were distributed to landowners in Missouri (n = 1 065) and Indiana (n = 1 378) in counties where the hellbender is known to exist. A multinomial logit regression model was used to assess the relationship between basic wildlife beliefs, species-specific attitudes and behavioural intentions towards the hellbender.
Key results. The response rate was 36.6% in Missouri and 41.0% in Indiana. The more value individuals placed on non-hunting wildlife experiences, the less likely they were to say they would engage in a behaviour harmful to the animal (β = –0.47, P = 0.030). The more negative the attitudes towards the hellbender held by individuals, the less likely they were to say they would remove the hook (β = –0.55, P < 0.001), put the animal back (β = –0.77, P < 0.001), or call a resource professional (β = –0.33, P = 0.023). A comparison of the Akaike information criterion (AIC) scores and model log-likelihood values without (AIC = 2 858.36; LLV = –1 395.18) and with (AIC = 2 232.60; LLV = –1 077.30) the species-specific attitude measure showed that its inclusion improved the model.
Conclusions. Positive attitudes towards the hellbender and mutualistic wildlife beliefs were related to non-detrimental behavioural intentions. However, attitudes towards the animal were found to be a stronger and more consistent predictor of behavioural intentions than basic wildlife beliefs.
Implications. Efforts to conserve rare or little-known species should focus outreach strategies on developing positive attitudes towards these species, so as to achieve desired changes in behaviour.
Context. Human–wildlife conflict is a serious impediment to conservation efforts worldwide. This is also true for Bhutan, where dholes or wild dogs (Cuon alpinus), leopards and tigers constitute a menace to the livestock of farmers. Livestock losses as a result depredation by wild animals is a major cause of conflict with farmers, threatening their livelihoods, and causing a negative attitude that can lead to retaliatory killing of wildlife.
Aims. To survey farmers and document their livestock losses, as well as estimate the value of livestock losses and the causes of predation.
Methods. We conducted a questionnaire survey of 147 farming households in three zones of the Toebesa subdistrict of Punakha, Bhutan. Respondents provided information on their farming activities and household income, as well as on predation losses of cattle, goats, pigs, chickens, cats and dogs caused by dholes, tigers and leopards between 2006 and 2010. Additional data on livestock populations and losses were obtained from the Renewable Natural Resources Census at the subdistrict.
Key Results. The results showed that dholes kill more livestock than do common leopards and tigers, the two other known livestock predators in the study area. The annual average number of livestock killed by dholes was 0.19 per household, which is ∼2% of the total household income and ∼11% of income derived from livestock. Annual income from livestock contributes 21% to the total annual revenues of farmers in the study area. The practice of allowing cattle to freely range, unguarded, in the forest was identified as the primary factor causing high livestock losses to dholes.
Conclusions. Dholes are the principal predator in the study area and have a significant negative impact on farmers’ livelihoods through loss of income. Our findings that livestock depredation by dholes was significantly less inside the villages and on farmed plots than in the forests showed that the problem can be addressed by improved husbandry practices.
Implications. To reduce livestock depredation by dholes, incentives or strategies should be investigated for encouraging farmers to let their livestock graze inside and around villages, which includes stall feeding and tethering, and to cooperatively shepherd them in the forests during the day.
Context. The potential for research methods to affect wildlife is an increasing concern among both scientists and the public. This topic has a particular urgency for polar bears because additional research is needed to monitor and understand population responses to rapid loss of sea ice habitat.
Aims. This study used data collected from polar bears sampled in the Alaska portion of the southern Beaufort Sea to investigate the potential for capture to adversely affect behaviour and vital rates. We evaluated the extent to which capture, collaring and handling may influence activity and movement days to weeks post-capture, and body mass, body condition, reproduction and survival over 6 months or more.
Methods. We compared post-capture activity and movement rates, and relationships between prior capture history and body mass, body condition and reproductive success. We also summarised data on capture-related mortality.
Key results. Individual-based estimates of activity and movement rates reached near-normal levels within 2–3 days and fully normal levels within 5 days post-capture. Models of activity and movement rates among all bears had poor fit, but suggested potential for prolonged, lower-level rate reductions. Repeated captures was not related to negative effects on body condition, reproduction or cub growth or survival. Capture-related mortality was substantially reduced after 1986, when immobilisation drugs were changed, with only 3 mortalities in 2517 captures from 1987–2013.
Conclusions. Polar bears in the southern Beaufort Sea exhibited the greatest reductions in activity and movement rates 3.5 days post-capture. These shorter-term, post-capture effects do not appear to have translated into any long-term effects on body condition, reproduction, or cub survival. Additionally, collaring had no effect on polar bear recovery rates, body condition, reproduction or cub survival.
Implications. This study provides empirical evidence that current capture-based research methods do not have long-term implications, and are not contributing to observed changes in body condition, reproduction or survival in the southern Beaufort Sea. Continued refinement of capture protocols, such as the use of low-impact dart rifles and reversible drug combinations, might improve polar bear response to capture and abate short-term reductions in activity and movement post-capture.
Context. Reproductive seasonality in ungulates has important fitness consequences but its relationship to resource seasonality is not yet fully understood, especially for ungulates inhabiting equatorial environments.
Aims. We test hypotheses concerning synchronisation of conception or parturition peaks among African ungulates with seasonal peaks in forage quality and quantity, indexed by rainfall.
Methods. We relate monthly apparent fecundity and juvenile recruitment rates to monthly rainfall for six ungulate species inhabiting the Masai Mara National Reserve (Mara) of Kenya, using cross-correlation analysis and distributed lag non-linear models. We compare the phenology and synchrony of breeding among the Mara ungulates with those for other parts of equatorial East Africa, with bimodal rainfall and less seasonal forage variation, and for subtropical southern Africa, with unimodal rainfall distribution and greater seasonal forage variation.
Key results. Births were more synchronised for topi, warthog and zebra than for hartebeest, impala and giraffe in the Mara, and for impala and hartebeest in southern than in eastern Africa. This pattern is likely to reflect regional differences in climate and plant phenology, hider–follower dichotomy and grazing versus browsing. All six species except the browsing giraffe apparently time the conception to occur in one wet season and births to occur just before the onset or during the next wet season, so as to maximise high-quality forage intake during conception and parturition. Fecundity and recruitment rates among the African ungulates peak at intermediate levels of rainfall and are reduced at low or excessive levels of rainfall. Fecundity rate is most strongly positively correlated with rainfall pre-conception, during conception and during early gestation, followed by rainfall at about the time of parturition for all the grazers. For giraffe, fecundity rate is most strongly correlated with rainfall during the gestation period.
Conclusions. Rainfall seasonality strongly influences reproductive seasonality and juvenile recruitment among African ungulates. The interaction of the rainfall influence with life-history traits and other factors leads to wide interspecific and regional variation.
Implications. Global climate change, especially widening annual rainfall variation expected to result from global warming, could reduce the predictability of the timing of peak forage availability and quality based on meteorological cues, the length of time with adequate nutrition or both, and hence reduce reproductive success among tropical ungulates.
Context. Multiple scales of research are needed to understand the ecology and conservation requirements of species whose ecology is characterised by marked spatial and temporal dynamism. The flock bronzewing pigeon may provide a model for the conservation management of species with similar dispersive ecologies.
Aims. This study aimed to document the species composition and its variability in seeds consumed by flock bronzewing pigeons across a period of contrasting seasonal conditions, and to relate this diet to variation in food resource availability.
Methods. The diet of the flock bronzewing pigeon was described by analysis of the crop contents of samples collected over the period from June 2006 to September 2007 at one pastoral property on the Barkly Tablelands, Northern Territory. Variation in food resource availability was assessed using data from remote sensing, grassland community structure, and direct measurement of soil seed density. Multivariate statistical methods were used to test variation in plant community structure between years and among land units; generalised linear modelling was used to examine inter-annual variation in the abundance of key food plant species and seasonal variation in seed abundance.
Key results. Across the period of this study, the diet of flock bronzewing pigeons on the Barkly Tableland was largely restricted to seeds of a small number of plant species within Mitchell grasslands. Dietary patterns varied between years; evidence from remote sensing, grassland community structure, and seed density was consistent with these dietary patterns.
Conclusions. Flock bronzewing pigeons appear to be adapted to exploiting rare, episodic events, leading to high seed production by the ephemeral or annual component of perennial tussock grasslands. Key food plant species include the forbs Wedelia asperrima, Trichodesma zeylanicum and Phyllanthus lacerosus and the large-seeded annual grass Chionachne hubbardiana. These species may not be those that provide critical resources during unfavourable periods.
Implications. Conservation management of flock bronzewing pigeons will entail strategies to maintain key food species in grazed landscapes, and to ensure replenishment of seed reserves of annual and ephemeral plant species. Management practices to achieve these goals may include rotational wet season spelling of paddocks. More information is required on the focal areas for persistence within these black-soil grassland landscapes.
Context. Human–wildlife competition is a worldwide problem. In the Brazilian Pantanal, the competition is between livestock and large cats, such as the jaguar (Panthera onca) and the puma (Puma concolor). Only a few studies have been conducted in the region and have indicated low levels of cattle predation. In addition to the paucity of information on livestock predation levels, information on the local ranchers’ understanding of cattle predation is limited.
Aims. To investigate local people’s perceptions of large cats and husbandry practices in order to understand some of the causes and extent of jaguar–livestock interaction in the Brazilian Pantanal.
Methods. We present comprehensive surveys of the local people’s perceptions towards large cats using a 5-point Likert scale evaluated using non-parametric tests in order to reach a better understanding of the causes of jaguar–livestock interaction and its extent in the Brazilian Pantanal.
Key results. In general, total mortality rate due to cat predation was 2.7 ± 4.9% of total cattle holdings. However, jaguars were reported as a real menace to cattle and cattle predation by large cats was a real concern for ranch operations. The majority of ranchers who implemented cattle management accept the risk of losing cattle to predation by large cats, but only a minority of respondents reported that they would rather live without jaguars.
Conclusions. The majority of the ranches surveyed had limited husbandry practices and the intensity of cattle management did influence respondents’ perceptions of predation by large cats.
Implications. We suggest that the focus of conservation actions be on cattle management aimed at minimising other sources of income loss caused by poor husbandry practices.
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