To understand mechanisms behind enigmatic declines of tropical reptiles, knowledge of species interactions and how they vary over space and time is important. Some tropical lizard population dynamics can be highly influenced by egg survival. Yet relatively few studies have examined relationships between lizard reproductive success and egg predators across forest and microhabitat types. In this study, we examined variation in probability of egg depredation, predatory ant abundance, prey availability, and the number of lizards and eggs encountered across four different forest types (abandoned agroforestry, abandoned plantation, secondary forest, and old-growth forest) and three microhabitats (buttress, fallen log, and leaf-litter) at La Selva Biological Station, Costa Rica. Based on previous studies, we made three hypotheses about how lizard egg abundance, egg survival, and predatory ant numbers would be related across microhabitat and forest type. Of these hypotheses, only one was supported: we found more lizard eggs in buttress and fallen log microhabitats than leaf-litter. We did not observe any differences in lizard reproduction or numbers of invertebrates by forest type alone. Based on patterns observed in this study, we suggest that future studies investigating tropical leaf-litter lizard declines focus on environmental variation at the microhabitat scale.

Understanding population dynamics and impacts on island ecology remain top priorities for the conservation management of seabirds, particularly when attempting species-recovery for island restoration. Identifying suitable nesting habitat is a keystone detail in seabird restoration which can be complicated when predator pressures impact colony productivity and population viability. The surface-nesting Kermadec Petrel Pterodroma neglecta neglecta is dispersed on remote islands through the tropics and subtropics. We examined their breeding ecology on Phillip Island, Norfolk Group in the South Pacific and considered the limitations to re-establishment at their previous breeding location on Lord Howe Island (900 km south-east). On Phillip Island, the petrels were mostly monogamous with nesting locations generally within the vicinity of the previous season’s attempts. Breeding sites were limited to sloping terrain 182–228 m above the shoreline and up to 85 m from the coast in small sub-colonies under low scrubby woodland. Based on observations of 56 pairs and data gleaned from Global Light Sensing devices, we determined that breeding (incubation and provisioning) occurs in all calendar months of the year, with a laying peak in the late austral spring. Breeding success in the first year of study was 25% but improved to 56% once management of Purple Swamphens Porphyrio melanotus was implemented. Successful nests were located at sites with naturally limited egress from cleared or lightly vegetated areas. Prudent management of the petrel population on Phillip Island could aid in the regional recovery of the species and, in the process, assist the island’s restoration by significantly increasing transfers of marine-derived nutrient. Their reintroduction to Lord Howe Island is also possible but will likely rely upon consistent productivity of the Phillip Island population for founding immigrants. Moreover, successful establishment will require adaptive management of selected sites to ensure native avian predators do not overly impact breeding.

Free-ranging pet cats (Felis catus) frequently kill wildlife but also return live prey to their owners. This raises welfare concerns if live animals released by cat owners subsequently die, since this is preventable, eg through prompt euthanasia. To estimate the mortality rate of birds released alive by cat owners, we examined the fates of 3,597 cat-attacked individuals submitted to four RSPCA wildlife centres in the UK. Individuals from 64 species were received but most cases (77%) involved just seven species commonly found in urban areas. The overall mortality rate (based on all individuals received at centres, ie including those which perished in transport, those which were euthanased on arrival and those which were admitted for care after having been triaged) was 78%; the post-admittance mortality rate (n = 2,070 birds admitted for care) was 62%. On average, individuals that perished (n = 2,798) survived for 3.0 days before dying or being euthanased. Juveniles were more likely to survive to release than adults, possibly because their small size means they are less likely to receive injuries that are ultimately fatal. Extrapolating from the limited data currently available, and applying conservative estimates at each stage, we estimate that a minimum of 0.3 million birds are released annually by cat owners but subsequently die. Substantial welfare improvements could be achieved if owners were more prepared to adopt strategies to limit hunting behaviour (eg fitting cats with collars and bells) and if owners and rehabilitators were able to effectively identify individuals with fatal injuries. The latter will require studies that quantify the effects of identifiable physical injuries on the likelihood of survival to release, in order to establish effective triage criteria.

As natural habitats continue to shrink in Kenya's Amboseli Ecosystem, livestock depredation by lions Panthera leo threatens both the livelihoods of pastoralist communities and the lion populations affected by retaliatory killings. Finding ways for people and carnivores to coexist at the landscape scale is crucial to the long-term persistence of many threatened animal populations. The fortification of existing traditional bomas to make them predator-proof reduces night-time depredation of livestock. However, the sustainability and cost-effectiveness of such an initiative rely on boma owners taking responsibility for the upkeep and repair of their bomas. In August 2018 we surveyed 88 predator-proof bomas constructed during 2012–2018 and recorded their characteristics and levels of damage. We examined which variables influence disrepair, using a series of statistical analyses, including generalized linear mixed models. Our results reveal there was more disrepair in bomas constructed with wooden posts, confirming the benefit of using recycled plastic posts; in bomas with lower livestock density, suggesting that fewer animals could cause more damage or that such damage is not repaired; and in bomas located further away from a neighbouring predator-proof boma, suggesting a social element in encouraging or enabling boma owners to carry out maintenance. We recommend the consideration and further investigation of this social influence in guiding and improving the sustainability of conservation programmes that use predator-proof bomas, with a view to reducing negative interactions between pastoralists and lions.

Livestock depredation by wild carnivores threatens carnivore populations and livestock-dependent human communities globally. Understanding local attitudes towards carnivores can inform strategies to improve coexistence. In Sri Lanka, the dairy industry is expanding, creating a need for proactive conflict mitigation. Livestock depredation by the Endangered Sri Lankan leopard Panthera pardus kotiya occurs, but little is known about these incidents or the attitudes of those whose livelihoods may be threatened by this. We surveyed people in two rural communities, Palatupana and Maskeliya, that differed in the scale of livestock ownership, livestock management practices and socio-ecological factors, to characterize attitudes towards leopards and understand their determinants. In Palatupana, an area with extensive cattle rearing, depredation incidents were frequent, and attitudes towards leopards were positively related to respondents' age, number of dependants, years spent rearing livestock and a greater overall support for wildlife conservation. Attitudes were negatively related to respondents' knowledge of leopard ecology and awareness of leopard-related tourism, from which cattle owners do not benefit. In Maskeliya, where cattle rearing is secondary to other agricultural work, depredation did not occur. Here, attitudes were positively related to a desire for increased government assistance with cattle rearing. The inability to develop land for cattle husbandry was a common barrier experienced in both communities. Considering local attitudes can inform strategies to improve human–carnivore coexistence. Approaches that could improve attitudes towards leopards include involvement of cattle owners in tourism programmes, exploring potential alternative land ownership schemes, and improving infrastructure and access to veterinary care.

We assessed losses of livestock to lions Panthera leo and leopards Panthera pardus in the Adiyo and Gimbo districts in Kafa Biosphere Reserve, Ethiopia. We quantified the economic impact, conducted household and group interviews, and explored potential solutions with local people. During 2009–2013 there were 350 and 62 attacks by lions and leopards, respectively. Households that suffered attacks on their livestock lost a mean of USD 287 and USD 310 in 2012 and 2013, respectively. Although lion attacks are more frequent than leopard attacks, our qualitative data indicate that tolerance for the former is higher because lions are more respected in the local culture. We describe how depredation is culturally mitigated and how retaliatory killing is avoided. Given people's tolerance towards them, carnivores may persist in their highland refugium, opening an arena for conservation that is not strictly linked to protected areas or to classical economics.

Compensation schemes can contribute to equitable sharing of benefits from wildlife. We describe a scheme that uses tourist fees for partial and conditional compensation of damage to livestock caused by wildlife on Kuku Group Ranch, Kenya. The explicit aim of the scheme is to decrease the killing of lions Panthera leo by Maasai on community land in the Amboseli–Tsavo ecosystem. During 2008–2013 the scheme spent a mean of USD 100,000 per year, and although livestock losses remained constant the killing of lions decreased significantly. The percentage of claims where part of the compensation was withheld as a penalty for negligent husbandry practices decreased significantly over time but remained high; poor herding in particular remains a problem. We weigh our results against arguments found in a literature survey; our findings support the negative arguments of moral hazard (i.e. the risk that compensation reduces the incentive to prevent damage) and post-project collapse. Despite these weaknesses the compensation scheme was effective, affordable and sustainable. We conclude that compensation is a useful conservation tool in situations where there is an imminent threat to biodiversity, and sustainable funding sources are available.

Rural depopulation has different effects on biodiversity and ecosystems in many regions of the world. For large carnivores such as pumas (Puma concolor) the effects are uncertain. An analysis of relationships between patterns of rural depopulation and perceptions of the risk posed by pumas among Aymara people in the altiplano region of Chile examined perceived risk, as well as self-reported losses, in relation to livestock husbandry, sociodemographic variables (age, household size, and residency status), and reported self-sufficiency. There was no evidence that rural depopulation elevated perceived risk, or the level of self-reported losses of livestock blamed on pumas. Indeed, many respondents, including older respondents and those with smaller households, reported a decline in perceived risk over the preceding five years. These perceptions of risk were not associated with self-reported losses to pumas in the previous year. An increase in perceived risk was associated with the use of guards for livestock, suggesting livestock owners accommodated their absences from herds by using guards. Absolute numbers of livestock lost increased with the distance from households to where livestock were grazed or gave birth. A cost-effective verification system for puma attacks is recommended, and further human dimensions research is required to identify the owners who complained and the costs and benefits of different wildlife species. Further interventions to prevent either livestock losses or retaliation against pumas can then be targeted more precisely.

Wyoming Game and Fish Department depredation payments were established to increase landowner tolerance toward, and thus the supply of, certain types of wildlife. This study examined how socio-economic and demographic characteristics of farmers and ranchers in Wyoming relate to tolerance toward wildlife and depredation claim submission. The severity of depredation and landowner satisfaction with the depredation policy were evaluated. The financial stability and economic intent of farmers and ranchers significantly influenced tolerance toward wildlife. Landowners tended to be less tolerant of depredation ensuing from elk. The complexity of the submission process was a deterrent to damage claim submissions.

Human-wildlife conflict is detrimental to the conservation of threatened carnivores and the livelihoods of rural communities. This paper compares perceived levels of human-carnivore conflict experienced on five Namibian communal conservancies and four resettled farming areas. Factors explored include how reported depredation was affected by livestock husbandry practices, the perceived annual cost of depredation and the reported problem predator species. Of the 147 respondents interviewed, perceived depredation was greater than in previous studies; high perceived depredation was associated with greater rates of predator removal, increased ranking of predators as problems and increased predator sighting frequency. Small stock species were the most commonly depredated livestock. The most frequently perceived predators were: jackals on goats and sheep, wild cats on chickens, leopards on horses and spotted hyenas on cattle. The financial cost of this predation was US$508898, mostly attributable to cattle depredation, and agricultural training schemes recommending good livestock management may help reduce this cost. A move from small to large stock farming could be promoted in areas with an abundance of small- to medium-sized carnivores and a lack of large carnivores. Further incentives, such as meat provision and income from consumptive and non-consumptive tourism could ensure benefits outweigh costs of wildlife coexistence.

Conflict between dolphins and fisheries is an important management issue in many parts of the world. In 2002, we examined the extent of depredation in the Italian small scale fishery by means of in situ interviews. Overall, 245 landing sites were investigated, representing 11.09% of the whole Italian artisanal fleet. The association between the commonly used artisanal fishing gear and the interacting fauna was investigated by means of correspondence analysis. Set gillnet and trammel nets were the types of the fishing gear most vulnerable to dolphin depredation; the interaction with these gear amounted to 66.4% while fish damage was reported in 72.2% of the cases. A regional ranking of the interactions in terms of both fishing gear alteration and fish damage, shows that the problem is most pressing in the Friuli, Campania, Sardinia and Apulia regions. This study is the first attempt to monitor dolphin–fisheries interactions and assess depredation rates in Italy, providing information on the areas where future investigation should be concentrated.