Action 2b. Minor Rare Major Unlikely Minor Likely Moderate Likely The wild Presumes Removal of Current size RRs will be It may take Will result in If only a Remove population will that sufficient animals may of these core removed several years lower genetic small number small be bolstered numbers are jeopardise the populations from wild to collect diversity in the of RRs are numbers of by taken into long-term is not known, populations sufficient RRs captive translocations captivity to viability of the so impact on as for a viable population and initially, the CRR from in the future establish a source core them will be encountered captive a slow genetic the wild to from captive genetically populations unknown in trapping to population increase in diversity will maintain stock viable monitor the size of the be more population population captive strongly both wild and the and in population biased and captive captive general towards populations breeding biodiversity these few program is surveys individuals successful Major Likely The previous This will be captive exacerbated breeding if there is program failed, only a slow partly because trickle of of declining founder CRR enthusiasm into the and captive commitment. population. Without This section is not of coloured in funding to Red as this is agreed a logistic translocation constraint, goals, the not a captive biological program may influence on collapse again. the objective. Action 2c. Minor Almost Unlikely Likely Moderate Likely During the Certain Wild The wild In a boom This approach Delay (for Don’t know Remove boom phase, population population phase it will is most likely unknown time) when the CRR from sufficient may crash has be much to result in a in next boom expanding CRRs will be before the easier to viable captive establishment will occur ‘disappeared’ – in the next boom in the past, collect the breeding of captive climate populations population to phase but core numbers of population, but population dependent. support both populations CRRs a wild and a are currently needed to
Action 2b. Remove small numbers of CRR from the wild to maintain both wild and captive populations Minor The wild population will be bolstered by translocations in the future from captive stock Rare Presumes that sufficient numbers are taken into captivity to establish a genetically viable population and the captive breeding program is successful Major Removal of animals may jeopardise the long-term viability of the source core populations Unlikely Current size of these core populations is not known, so impact on them will be unknown Minor RRs will be removed from wild populations as encountered in trapping to monitor the population and in general biodiversity surveys Likely It may take several years to collect sufficient RRs for a viable captive population Moderate Will result in lower genetic diversity in the captive population and a slow increase in size of the captive population Likely If only a small number of RRs are initially, the genetic diversity will be more strongly biased towards these few individuals Major The previous captive breeding program failed, partly because of declining enthusiasm and commitment. Without of funding to agreed translocation goals, the captive program may collapse again. Likely This will be exacerbated if there is only a slow trickle of founder CRR into the captive population. This section is not coloured in Red as this is a logistic constraint, not a biological influence on the objective. Action 2c. Remove CRR from expanding populations Minor During the boom phase, sufficient CRRs will be in the population to support both a wild and a Almost Certain Wild population may crash before the next boom phase Unlikely The wild population has ‘disappeared’ in the past, but core populations are currently In a boom phase it will be much easier to collect the numbers of CRRs needed to Likely This approach is most likely to result in a viable captive breeding population, but Moderate Delay (for unknown time) in establishment of captive population Likely Don’t know when the next boom will occur – climate dependent.