It's surprising to me that Sembe still hasn't transferred out considering she's now seventeen. To be fair though, she doesn't really have many options as to a female she could be transferred out with.The future of Taronga’s community:
Following the import of the female from South Korea this year (by Rockhampton Zoo), it wouldn’t surprise me if the next overseas import by the region was undertaken by Taronga Zoo.
As per the female dispersal pattern, it’s anticipated their four youngest females will be transferring out long term:
0.1 Sembe (27/02/2008) Lubutu x Shiba
0.1 Safiri (16/05/2019) Sule x Shiba
0.1 Lemba (23/05/2023) Sule x Lisa
0.1 Cekiri (29/07/2023) Sule x Ceres
Of the eight adult females remaining, six are older than any of the nine males in Taronga’s community and all eight are older than every male in the community bar Shabani. The three breeding females are Ceres, aged 34; Kuma, aged 33; and Naomi, aged 24. It’s therefore fair to say that in a decade’s time, Taronga would (without new females) be reduced to a single breeding female. If only they’d proceeded with the original plan (in 2015) to import Marie (2005) and Marit (2006) from Sweden!
1.0 Shabani (14/09/1994) Monte x Shiba
1.0 Samaki (27/11/2001) Lubutu x Shiba
1.0 Furahi (28/02/2003) Lubutu x Kuma
1.0 Shikamoo (25/07/2003) Lubutu x Sacha
1.0 Sule (04/04/2008) Lubutu x Sacha
1.0 Fumo (16/10/2013) Shikamoo x Kuma
1.0 Sudi (09/08/2014) Shikamoo x Shiba
1.0 Liwali (22/09/2014) Samaki x Lisa
1.0 Niambi (07/10/2020) Sule x Naomi
0.1 Lisa (23/08/1979) Unknown x Lulu
0.1 Sacha (11/06/1980) Unknown x Spitter
0.1 Shiba (22/05/1981) Unknown x Susie
0.1 Shona (09/10/1987) Unknown x Sutu
0.1 Ceres (19/09/1990) Toto x Jenny; Imported 2015
0.1 Kuma (06/12/1991) Snowy x Ficha
0.1 Kamili (02/09/1995) Snowy x Koko
0.1 Naomi (25/01/2001) Toto x Jenny; Imported 2015
The zoo have been quite clear that any future introductions of new females would involve a family. Hannah (a lone female) failed to integrate; and Ceres and Naomi (a pair of females) struggled to integrate; so it wouldn’t surprise me if three related females were brought in - perhaps a mother with adolescent/young adult daughters; or three adolescent/young adult females from the same community.
The best case scenario would be for her to transfer up to Rockhampton, who could utilise additional females, however it seems they're content with acquiring the new female from Korea and maintaining their troop as it is for the meantime.
Sembe's best option is to wait until her younger sister is old enough to transfer out (likely another five or so years), with the pair then transferring out together. Rockhampton still remains an option for both of them come that point in time - Capri will also be transferring out by then. Or even Sydney - who as you've stated, will also need additional females eventually due to the current group demographics.