As far as I know in the US: Maryland Zoo in Baltimore Kansas City Zoo St. Augustine Alligator Farm San Diego Zoo ABQ Biopark Zoo Atlanta
From Crocodilians in American Zoos Mecistops cataphractus (West African slender-snouted crocodile) ABQ BioPark Zoo (Albuquerque, New Mexico) Busch Gardens Tampa (Tampa, Florida) Kansas City Zoo (Kansas City, Missouri) Oregon Zoo (Portland, Oregon) Maryland Zoo (Baltimore, Maryland) Reptile Lagoon (Hamer, South Carolina) San Diego Zoo (San Diego, California) St. Augustine Alligator Farm Zoological Park (St. Augustine, Florida) Zoo Atlanta (Atlanta, Georgia)
Are the zoos checking which species? Mecistops is now split into 2 species, M.caraphractus (West African) and M.leptorhynchus (Central African).
According to CITES, two West African slender-snouted crocodiles were sent from the Netherlands to Brazil in 1994 for commercial purposes.
Since, they have a project with Abidjan Zoo, Cote d'Ivoire, I think they have checked what species of slender snouted crocs are in captivity in AZA/SSP region.
All pictures of slender-snouteds in Europe so far that I have seem are West-African specimens, but for some zoos (Sigean (France) which has juveniles and Protvin (Czechia), Sosto Zoo (Hungary), Zoopark im. A.S.Popova (Russia) and Welt der Reptilien - Der Zoo (Germany) for which I didn't directly found pictures) I couldn't confirm this yet.
Since both species are spatially separated by the highlands in Cameroon, we can exclude any hybrids along wild-caught specimens. That leaves us with three institutions who have bred: I know that the pair in Blijdorp are both Western, so any offspring born at Emmen are pure as well. La Planète des Crocodiles has offspring of Emmen, so their second generation offspring is pure as well. Which leaves us with Biotropica which as bred with their group, and Sigean which has juvenile offspring from them by extent. I haven't seen pictures of all animals in their group. But considering at least 4 of them are of the Western species and that their animals came as one group from Pierelatte, I think it's safe to presume for now that all 7 animals originate from the same wild source.
These are all the individuals I know off in Europe, note that this list is likely incomplete: Czechia Zoo Dvur Kralove 0.1.0 Probably M. cataphractus Zoo Ostrava 0.2.0 M. cataphractus 0.1.0 Mecistops sp. Krokodýlí zoo (Protivin) 0.0.X Mecistops sp. Denmark Krokodille Zoo (Eskilstrup) 1.0.0 M. cataphractus France Alligator bay (Beauvoir) 0.0.X - 0.0.0 Mecistops sp. (listed on ZTL, without source) La Planète des Crocodiles (Civeaux) 1.1.X M. cataphractus (pair + offspring) Zoo de la Palmyre (Les Mathes) 0.0.1 Mecistops sp. Safaripark Sigean 0.0.X M. cataphractus (offspring from Biotropica) Biotropica (Val de Reuil) 1.4.X M. cataphractus Germany Welt der Reptilien - der Zoo (Beilrode - Döbrichau) 0.0.X Mecistops sp. Hungary Sosto Zoo (Nyíregyháza) 0.0.X Mecistops sp. Netherlands Diergaarde Blijdorp (Rotterdam) 1.1.0 M. cataphractus Russia Zoopark im. A.S.Popova (Voronezh) 0.0.1 Mecistops sp. Spain L'oceanographic (Valencia) 0.0.1 M. cataphractus United kingdom Zoo Colchester 0.1.0 M. cataphractus "Caroline" Crocodiles of the World (Crawley) 0.1.0 M. cataphractus
Protivin has 2,2 - males came from Emmen and are young, females are F1 "from France". I think Valencia doesn´r have any of this species, their only animal came to Dvur in 2020.
An updated list then Czechia Zoo Dvur Kralove 0.1.0 M. cataphractus Zoo Ostrava 0.2.0 M. cataphractus 0.1.0 Mecistops sp. Krokodýlí zoo (Protivin) 2.2.0 M. cataphractus Denmark Krokodille Zoo (Eskilstrup) 1.0.0 M. cataphractus France Alligator bay (Beauvoir) 0.0.X - 0.0.0 Mecistops sp. (listed on ZTL, without source) La Planète des Crocodiles (Civeaux) 1.1.X M. cataphractus (pair + offspring) Zoo de la Palmyre (Les Mathes) 0.0.1 M. cataphractus Safaripark Sigean 0.0.X M. cataphractus (offspring from Biotropica) Biotropica (Val de Reuil) 1.4.X M. cataphractus Germany Welt der Reptilien - der Zoo (Beilrode - Döbrichau) 0.0.X Mecistops sp. Hungary Sosto Zoo (Nyíregyháza) 0.0.X Mecistops sp. Netherlands Diergaarde Blijdorp (Rotterdam) 1.1.0 M. cataphractus Poland Wroclaw Zoo 0.0.X M. cataphractus Russia Zoopark im. A.S.Popova (Voronezh) 0.0.1 Mecistops sp. United kingdom Zoo Colchester 0.1.0 M. cataphractus "Caroline" Crocodiles of the World (Crawley) 0.1.0 M. cataphractus
Apparently, all individuals have been tested in Europe and confirmed as M. cataphractus. Czechia Zoo Dvur Kralove 0.1.0 M. cataphractus Zoo Ostrava 0.3.0 M. cataphractus Krokodýlí zoo (Protivin) 2.2.0 M. cataphractus Denmark Krokodille Zoo (Eskilstrup) 1.0.0 M. cataphractus France Alligator bay (Beauvoir) 0.0.X - 0.0.0 M. cataphractus (listed on ZTL, without source) La Planète des Crocodiles (Civeaux) 1.1.X M. cataphractus (pair + offspring) Zoo de la Palmyre (Les Mathes) 0.0.1 M. cataphractus Safaripark Sigean 0.0.X M. cataphractus (young offspring from Biotropica) Biotropica (Val de Reuil) 1.4.X M. cataphractus Germany Welt der Reptilien - der Zoo (Beilrode - Döbrichau) 0.0.X M. cataphractus Hungary Sosto Zoo (Nyíregyháza) 0.0.X M. cataphractus Netherlands Diergaarde Blijdorp (Rotterdam) 1.1.0 M. cataphractus Poland Wroclaw Zoo 0.0.X M. cataphractus Russia Zoopark im. A.S.Popova (Voronezh) 0.0.1 M. cataphractus United kingdom Zoo Colchester 0.1.0 M. cataphractus "Caroline" Crocodiles of the World (Crawley) 0.1.0 M. cataphractus
So, potentially this could be a functioning EEP/EAZA program? Any information on the genetics of the population and whether these are wildcaught or from captive-born stock? They might need to acquire some more founders!
It allready is an EEP, directed by Biotropica. I don't know exactly how many are wild and how many are captive. Right now, somewhere between 4 and 7 founders have bred (2 males, 2 - 5 females). The founder representation right now isn't that good yet, but there is still potential to increase this. And exchange of some eggs with the US is also an option in the future.
I think that this oceanic cooperation is actually already functioning somewhat with crocodiles. I would though support them to have direct links with West African range states for a combined in situ and ex situ plan. I think f.i. Abidjan Zoo in Cote d'Ivoire is heavily invested in this species.
