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Walking The Bears.pdf

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(ii)Brown bear: In Romania, with radio-telemetry<br />

the rehabilitators could learn that releasing<br />

bear cubs at seven months of age can lead to<br />

predation by lynx, wolf and other bears<br />

(Leonardo, pers.com.).<br />

(iii)Sun bear: In Borneo, radio-tracking helped<br />

Fredriksson (2005) to learn that confiscated<br />

adultsunbearsendupinvillagesandgetkilled<br />

when released in environments not familiar to<br />

them.<br />

(iv)Spectacled bear: Similarly in Ecuador,<br />

researchers radio-collared five spectacled bears<br />

before release and found out that they all<br />

moved into human habitations shortly after<br />

release (Dave, pers.com.).<br />

All these centres were in a position to learn from their<br />

first releases, and modify the rehabilitation method to<br />

suit their local situations. <strong>The</strong>y had all radio-collared<br />

their bears and were therefore in a position to<br />

document what happened, analyze everything and<br />

addressthoseissues.Strangely,thoughthereasonsfor<br />

failures were not much different (i.e. straying,<br />

predation and getting killed), the method of resolving<br />

the issue was not always the same.<br />

Since bear habitats also comprise hilly terrains,<br />

rehabbersreporteddifficultyintrackingbearsespecially<br />

when they are hard released. Hard released subadult<br />

and adult bears are known to move long distances<br />

before they settle down to establish a home range of<br />

theirown.Onanaverage,releasedAmericanbearshave<br />

beenknowntomove35kilometersfromthereleasesite,<br />

the maximum dispersal distance recorded being over<br />

400 km (Beecham, 2006). In Ecuador and Romania,<br />

biologists employed the services of gliders and aircrafts<br />

to radio-track spectacled bears and brown bears.<br />

Manyrehabilitatorscitedfundingconstraintasthemajor<br />

reasonfornotresortingtoradio-trackingoftheirreleased<br />

bears.Mostofthosewhopresentedduringtheworkshop<br />

employedVHFcollarssinceGPScollarsareexpensive.<br />

TamoDadda/WTI<br />

Sincerehabilitatorsconsidered<br />

radio-collaringitselfadrainontheir<br />

resources,trackingthebearsfor<br />

morethanayearwasconsidereda<br />

luxurybymany<br />

How long should the released bears be monitored to<br />

consideritasuccess?Thisquestionwasraisedbysome<br />

participants in the workshop. <strong>The</strong>re appears to be<br />

three levels of monitoring:<br />

1. Looking at short term survival of bears (six<br />

months to one year from release)<br />

2. Looking at long term survival (up to 2 years<br />

after release)<br />

3. Monitortoknowwhetherreleasedbearshave<br />

contributed to the wild population<br />

Mostofthosewhoradio-collaredbearsformonitoring,<br />

looked at the short term survival of released bears.<br />

Since rehabilitators considered radio-collaring itself a<br />

drain on their resources, tracking the bears for more<br />

than a year was considered a luxury by many. Clark et<br />

al (2002) mentioned that future studies evaluating<br />

orphaned bear releases should focus on long-term<br />

survival, reproductive contribution to local<br />

population, and the influence of rehabilitation<br />

methods on the survival of bears after release. In a<br />

rehabilitation program handling ten bears every year,<br />

it may not be feasible to monitor all bears for their<br />

reproductive contribution to the resident population<br />

of bears. As Beecham (2006) mentions, because bears<br />

do not reproduce until they are at least 3 or 4 years<br />

old, it is often impracticable to monitor their<br />

productivityexceptinaresearchenvironment.Atleast<br />

two of the bear rehabilitation projects presented<br />

during the workshop reported on the successful<br />

breeding of released females. Ben Kilham reported<br />

about a 10 year old female which is still alive, having<br />

raisedfivesetsofcubs.Evenoneofheroffspringaged<br />

Radio-collaring of an Asiatic black bear at the Centre for Bear Rehabilitation & Conservation, India<br />

and a spectacled bear at the Andean Bear Project, Ecuador.<br />

ABP,Ecuador

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