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Descrição de métodos de classificação entre corajoso e cauteloso por Sam Bremner-Harrison
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1Using personality of individuals as a means of improving reintroduction success
Dr Sam Bremner-HarrisonNottingham Trent University
(California State University, Stanislaus, Endangered Species Recovery Program)
2Personality research Farm animals research into suitability of
animals for particular needs
Zoo management research into individual behavioural types and relationship to factors such as enclosure design or breeding success
Wild animals? more limited research, but some occurring
3 Release candidates selected on the basis ofAgeSexHealthGenotype
Behaviour
ShyBold
Personality research in conservation
4Effect of boldness on success of reintroduced animals
Personality research for in-situ conservation of small canids
5 Swift fox (Vulpes velox)
Santa Catalina Island fox(Urocyon littoralis catalinae)
San Joaquin kit fox(Vulpes macrotis mutica)
6All 3 species showed evidence of personality influencing behaviour and survival Swift fox
bolder foxes had higher levels of mortality(t14 = -2.291, P < 0.04)
bolder foxes moved further from release site and further between telemetry fixes.(r14 = 0.588, P
7 Island fox
foxes that were bolder showed trend towards dispersing further
foxes that were bolder showed trend towards having higher levels of reproduction
Bremner-Harrison, S. & Cypher, B. L. 2005. Island fox behavioural assessment on Santa Catalina. Report prepared for Institute of Wildlife Studies and Catalina Island Conservancy.
8 San Joaquin kit fox
foxes in urban vs. natural lands differed in levels of boldness
higher boldness in urban areas = larger litters
higher boldness = higher levels of mortality
higher boldness = increased movementsBremner-Harrison, S. & Cypher, B. L. In Prep.
9 Recommended
Increase likelihood of success of release programme
Improves welfare on an individual basis
Incorporating personality into reintroduction/translocation practices?
Incorporating personality into reintroduction/translocation practices?
Constraints? Effort (labour and time) Financial implications
In-situ versus ex-situ?
10
11
Assessing personality ex-situ versus in-situ
Ex-situ Swift fox: 5 months assessed 84 individuals Island fox: 4 weeks assessed 11 individuals
In-situ SJ kit fox: 5 years assessed 87 individuals
Can we add this step?
Ex-situ Additional step could be added in fairly
easily
Size or characteristics of the animal less of a constraining factor
12
Can we add this step?
In-situ Smaller species or those with individual
markings more easily assessed May involve repeated capture of individuals May cause time-delay between initial capture
and decision whether suitable release candidate
Could be assessed during quarantine period
13
Additional effort? Ex-situ
Little additional cost in terms of both money or labour
In-situ Smaller species: less impact Larger species: could add significantly to budget Need for quick and valid personality field test for
larger species Currently comparing results of novel object tests
with behaviour during handling for SJ kit fox14
Founder populations and personality?
The mix matters!!
Dont only release the individuals with the optimal boldness score for the release environment...
15
Founder populations and personality? New populations should contain range of
boldness levels Provide a mix of individual temperaments to
increase chances of successful release:
greater diversity = greater adaptability
Combination of mix may alter with subsequent releases.
16
Final thoughts Personality and Welfare Swift fox reintroduction programmes
Considered successful: both achieved self-sustaining, linked populations
Canada: 1983 1997 Released 942 foxes
Montana: 1998 2002 Released 121 foxes
Overall survival outweighed mortality, but still significant levels of mortality
17
Can we use personality to reduce numbers of individuals required to achieve success, thereby improving welfare?
Supporters