Livestock vulnerability among herding practices
Livestock in general are more vulnerable to predation than their wild counterparts, because they may have lost their natural instinct to effectively fend off the predators (Polisar et al. 2003) as a result of domestication. We determined that livestock generally released to the nearby forests for grazing (FGH and FGWH) were more vulnerable than those stall-fed (SF) and kept within some enclosures (FPG). We based this assessment from the manner in which predators took livestock. In Bhutan, large predators, except leopards, rarely come to the human settlements to take away livestock. There have been incidences of tigers coming near animal sheds in human settlements when they were too old to hunt wild prey (Kuensel, 2005). However, the success rate of livestock capture from such behaviour was very low. Leopards are known to come very close to human houses but usually in order to hunt domestic dogs.
Further, we considered livestock left freely grazing in the forests without accompanying herders (FGWH) more vulnerable than those with herders (FGH). This was because the number of livestock lost to predators when not herded was significantly higher than when herded. Ogada et al. (2003) also noticed closely herded livestock were less likely to be killed by African carnivores. Moreover, 65% of the free-ranging animals were released farther than 2-km distance from the human settlements which rendered the animals easy prey to wild predators. Large carnivores normally select wild herbivores if available in adequate number (Treves and Karanth 2003; Ogara et al. 2010), but they turn to domestic livestock in livestock-dominated landscapes (Rajaratnam et al. 2015), especially if livestock are left to range freely without herders (Meriggi et al. 1996).
Seasonally, livestock were more vulnerable during summer and early autumn because during this peak farming season, livestock are often released to range freely in the nearby forest, according to farmers. In winter and early spring when farmers were free from farm work, livestock were less vulnerable because farmers tended them more intensively and they were kept nearer to cleared farmlands and sheds (Thinley et al. 2011). Such a seasonal pattern of livestock loss was also noted by Sangay and Vernes (2008) while analysing livestock depredation cases reported from all over Bhutan from 2003 to 2005. A comparable study by Jackson et al. (1996) in Nepal also reported that depredation losses peaked in late spring and early summer (April to June). Similarly, Dar et al. (2009) reported that the majority of livestock killed by leopard in Pakistan’s Machiara National Park occurred during the summer months of May and July.
Livestock vulnerability among type, breed, and sex
Among livestock types, we determined cattle to be the most vulnerable to predation, probably because cattle were released into the nearby forests more frequently and are mostly not herded. We also found indigenous breeds of cattle more vulnerable to predation than the imported high-yielding breeds based on herding practices and the significant quantity of indigenous breed lost to predation as compared to imported ones. Because imported breeds were more expensive, they were usually stall-fed. Thus, they were seldom lost to predators, except for some bulls which were let loose into the forest during farming seasons, whereas indigenous breeds were mostly released to the nearby forests. Bulls of indigenous breeds, particularly Jatsa and Nublang, were more vulnerable to predation than cows, because they were mostly left in the forests, far away from the homesteads during non-ploughing periods (Figure 2). This was determined from herding practice and observation in the field. Non-milking cows were more vulnerable than the milking cows because the latter were stall-fed until the calves were fully weaned.
Importance of proper livestock herding and its challenges
Our study underscores the importance of proper livestock herding, meaning assignment of herders to accompany livestock in forests, to minimize predation losses (Wang and Macdonald 2006; Rajaratnam et al. 2015). In Bhutan, due to the short supply of fodder and small per capita landholding averaging less than half an acre (NSB 2015b), people are compelled to release their livestock, especially cattle, to the nearby forests for grazing (Wangchuk et al. 2014). Such a situation naturally predisposes livestock to predation. But, careful analysis of the herding dynamics showed that if livestock were properly herded within the forests with accompanying herders, predation losses could have been reduced irrespective of type, breed, and sex.
Thus, our study has shown that livestock, irrespective of breed and type, were more vulnerable to predation when not herded than herded. This highlights the importance of proper tending of livestock if predation losses are to be minimized. Therefore, to minimize livestock predation, Bhutanese agro-pastoralists would need to appoint livestock herders to accompany animals released into the forests. However, this is challenging due to shortage of rural farm labour resulting from rural-urban migration and increased enrolment of children to schools (Wangchuk et al. 2014). Increased enrolment of children is one of the key drivers of rural-urban migration. Bhutanese youths seek employment in urban areas which is deemed as more rewarding with higher income than the laborious farm work in the villages (Dosch 2011). But, not all youth are employed due to limited employment opportunities in the government and private sectors. The youth employment rate as of 2014 is 92.7% (Tenzin 2015). Although several initiatives are taken by the government to attract educated youth to take up farm labour, the progress has been very slow. Therefore, there is a need to revisit the government’s policy of 100% enrolment to schools. The farm labour shortage is also a factor that drives rural people to migrate to urban areas in search of higher income opportunities (Dosch 2011).
Implications for livestock management policy
While we acknowledge the challenges of appointing cattle herders in rural areas, we have shown that low-value domestic breeds are more vulnerable to predation than the high-value imported ones, simply because the latter are tended better. Hence, livestock losses could be minimized further if the number of scrub cattle could be reduced through animal stock improvement programmes such as promotion of high-yielding breeds (Katel et al. 2015) through breeding bull supply and artificial insemination. The Department of Livestock has been carrying out such programmes (Spierenburg et al. 2004), but they need to be rigorously pursued in livestock depredation hotspots. Such a move is feasible, because some villages in central and western parts of Bhutan have shown a strong inclination towards raising small and productive cattle herds (Wangchuk et al. 2014). However, the trade-offs with shifting to exotic breeds, particularly the potential loss of genetic diversity resulting from loss of indigenous breeds (Barker 2001), need to be considered. We suggest maintaining small and manageable cattle herds with a balance between high-yielding exotic and low-yielding native breeds. It may be argued that stall feeding of exotic breeds may take up farmers’ time and space, but farmers themselves have mentioned that stall feeding is much easier than dropping off and rounding up cattle from the forests.
In addition, we have found lack of adequate pasture as another important reason for not herding livestock. Therefore, in conjunction with stock improvement, farmers could be leased with some portions of the SRF for development of pasture lands (Wang and Macdonald 2006) with proper management guidelines, including the prescriptions of proper fencing and corralling facilities. High-yielding and more nutritious varieties of fodder crops could be grown in the pasture lands, as also suggested by Spierenburg et al. (2004) and Tamang and Baral (2008). The feasibility of allocating grazing lands from the community forests could be explored as well. This policy has gained relevance in recent times because the government has taken back the traditional grazing rights such as registered tsamdro
Footnote 7 with the intention of improving grazing area management. Simultaneously, farmers could also be educated on the ranging behaviour of the wild predators, as suggested by Tumenta et al. (2013), and on the spatial pattern of their livestock depredation sites, as observed by Thinley (2010).
Bhutan currently lacks a comprehensive livestock management policy that ensures a balance between livestock production and minimizing losses to wild predators. As such, conflicts frequently arise between livestock owners, livestock officers, and wildlife managers. There is a need to develop an inclusive policy that addresses the concerns of both the wildlife managers and livestock holders whose participation will be crucial (Wangchuk 2002). We therefore suggest developing a comprehensive livestock management policy that has elaborate provisions on livestock herd management (requiring accompanying herders while grazing in the forests), stock improvement, fodder development, pasture development, and sustainable livestock insurance schemes. We also reiterate that compensation to livestock owners in any form is an important tool for managing human-predator conflicts in Bhutan (Sangay and Vernes 2014). Further, we have observed in this study that dholes are the dominant livestock predators. We do not recommend culling of dhole populations, because it is an ‘endangered’ species. In order to avoid massive dhole extirpation as in the 1970s and 1980s (Thinley et al. 2011), we suggest livestock officers and wildlife conservationists to equally prioritize compensating or insuring against losses to dholes as equally as being done for tigers and snow leopards.