The effect of attractant lures in camera trapping: a case study of population estimates for the Iberian lynx (Lynx pardinus)

Garrote, Germán; Gil‐Sánchez, José María; McCain, Emil B.; Lillo, Santiago de; Tellería, José Luis; Simón, Miguel Ángel

doi:10.1007/s10344-012-0658-7

Cited by 29 publications

(19 citation statements)

References 15 publications

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“…These results generally support our hypothesis that scent lure increases the number of CT detections of predator species, although the effect was not universal. The results also corroborate previous research suggesting that lures can increase CT detections of predator species [14,17]. The observed increase in detections of both large carnivores and small carnivores at lured CTs is likely explained by the fact that scent lures, such as the Long Distance Call lure used in this study, are targeted towards carnivores via scents associated with common prey species [16].…”

Section: Discussionsupporting

confidence: 91%

Effects of scent lure on camera trap detections vary across mammalian predator and prey species

Holinda

Burgar

Burton

2020

Preprint

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AbstractCamera traps are a unique survey tool used to monitor a wide variety of mammal species. Camera trap (CT) data can be used to estimate animal distribution, density, and behaviour. Attractants, such as scent lures, are often used in an effort to increase CT detections; however, the degree which the effects of attractants vary across species is not well understood. We investigated the effects of scent lure on mammal detections by comparing detection rates between 404 lured and 440 unlured CT stations sampled in Alberta, Canada over 120 day survey periods between February and August in 2015 and 2016. We used zero-inflated negative binomial generalized linear mixed models to test the effect of lure on detection rates for a) all mammals, b) six functional groups (all predator species, all prey, large carnivores, small carnivores, small mammals, ungulates), and c) four varied species of management interest (fisher, Pekania pennanti; gray wolf, Canis lupus; moose, Alces alces; and Richardson’s ground squirrel; Urocitellus richardsonii). Mammals were detected at 800 of the 844 CTs, with nearly equal numbers of total detections at CTs with (7110) and without (7530) lure, and variable effects of lure on groups and individual species. Scent lure significantly increased detections of predators as a group, including large and small carnivore sub-groups and fisher specifically, but not of gray wolf. There was no effect of scent lure on detections of prey species, including the small mammal and ungulate sub-groups and moose and Richardson’s ground squirrel specifically. We recommend that researchers explicitly consider the variable effects of scent lure on CT detections across species when designing, interpreting, or comparing multi-species surveys. Additional research is needed to further quantify variation in species responses to scent lures and other attractants, and to elucidate the effect of attractants on community-level inferences from camera trap surveys.

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Section: Discussionsupporting

confidence: 91%

Effects of scent lure on camera trap detections vary across mammalian predator and prey species

Holinda

Burgar

Burton

2020

Preprint

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“…Each camera trap was visited once a week for troubleshooting and care for live bait. Lynx were individually identified from the photographs using their coat patterns5657. Given the intensive monitoring since 2002 and the small population size of Iberian lynx, all adult population is individually identified at SA2056.…”

Section: Methodsmentioning

confidence: 99%

Disease-mediated bottom-up regulation: An emergent virus affects a keystone prey, and alters the dynamics of trophic webs

Monterroso

Garrote

Serronha

et al. 2016

Sci Rep

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Emergent diseases may alter the structure and functioning of ecosystems by creating new biotic interactions and modifying existing ones, producing cascading processes along trophic webs. Recently, a new variant of the rabbit haemorrhagic disease virus (RHDV2 or RHDVb) arguably caused widespread declines in a keystone prey in Mediterranean ecosystems - the European rabbit (Oryctolagus cuniculus). We quantitatively assess the impact of RHDV2 on natural rabbit populations and in two endangered apex predator populations: the Iberian lynx (Lynx pardinus) and the Spanish Imperial eagle (Aquila adalberti). We found 60–70% declines in rabbit populations, followed by decreases of 65.7% in Iberian lynx and 45.5% in Spanish Imperial eagle fecundities. A revision of the web of trophic interactions among rabbits and their dependent predators suggests that RHDV2 acts as a keystone species, and may steer Mediterranean ecosystems to management-dependent alternative states, dominated by simplified mesopredator communities. This model system stresses the importance of diseases as functional players in the dynamics of trophic webs.

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“…An absence of large-bodied mammals near the road raises the question on the tolerance of these species to disturbance by the road. This also infers the secretive, elusive and natural behaviour of large mammals which tend to avoid any anthropogenic activities (Mohd-Azlan & Sharma, 2006;Garrote et al, 2012;Brodie et al, 2015a). Some of the animals are species of conservation importance, habitat specialists or endemic.…”

Section: Discussionmentioning

confidence: 97%

Distribution, relative abundance and occupancy of selected mammals along paved road in Kubah National Park, Sarawak, Borneo

Sally¹,

Woo²

2018

Nat. Cons. Res.

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Research on ecological impacts of roads has seldom been studied on Borneo. This includes information on their influence on wildlife dynamic in National Parks and other areas harbouring biodiversity. This knowledge is important to prescribe best management practices, by avoiding, minimising and compensating for adverse impacts such structures may have on individuals, populations and communities. In order to understand the effects of a paved road, located within a protected area (Kubah National Park, Sarawak, western Borneo), on the local mammal species, we set up an array of 20 camera traps using stratified sampling, along a spatial gradient of five distance categories from the road. This ranged from the edge of the road to the interior part of the forests, in the following manner: A) 0-5 m at the edge, B) 5-100 m, C) 100-200 m, D) 200-300 m, and E) 300-400 m. We explored the relationships between the distance to the road with mammalian species richness, and subsequently, for carnivores, ungulates, and Viverridae sp. (civets) and finally, attempted to estimate the density of these animal groups. Camera trap surveys accumulated 2161 camera days, which resulted in 1938 independent animal photos that consisted of 19 species of wild mammals, six species of birds and one reptile species along the gradient. This study suggests that areas close to the road (0-5 m) are used significantly less than other areas (n = 8), while cameras located within the distance range from 5-100 m and 100-200 m detected the highest number of species (n = 18). The highest numbers of ungulates and members of the family Viverridae (civets) were recorded at 5-100 m, while the distance category 100-200 m recorded the most numbers of carnivores. Several species that could be tolerant to some level of disturbance, such as the leopard cat (Prionailurus bengalensis), banded palm civet (Hemigalus derbyanus), long-tailed porcupine (Trichys fasciculata), and lesser mousedeer (Tragulus kanchil) showed preference at 5-100 m. This might be due to their general diet behaviour and abundance of food resources nearby the forest edge. The findings from this study need to be carefully interpreted as it is based on a small scale project, therefore may not provide information required to quantify and mitigate the negative effects of roads in protected areas. Comprehensive long-term monitoring with appropriate replications, will be required for making appropriate management recommendations for enhancing conservation within the protected areas of Sarawak.

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The effect of attractant lures in camera trapping: a case study of population estimates for the Iberian lynx (Lynx pardinus)

Cited by 29 publications

References 15 publications

Effects of scent lure on camera trap detections vary across mammalian predator and prey species

Effects of scent lure on camera trap detections vary across mammalian predator and prey species

Disease-mediated bottom-up regulation: An emergent virus affects a keystone prey, and alters the dynamics of trophic webs

Distribution, relative abundance and occupancy of selected mammals along paved road in Kubah National Park, Sarawak, Borneo

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