Based on ZTL, the number of zoos housing various forms of wild cats are as follows:
Jungle cat (Felis chaus) 33: Caucasian jungle cat (chaus) 1; Palestine jungle cat (furax) 4; Egyptian jungle cat (nilotica) 1
Sand cat (F margarita): Arabian sand cat (harrisoni) 26
Wild cat (F silvestris): Gordon’s wild cat (gordoni) 9; Scottish wild cat (grampia) 23; African wild cat (libyca) 1; East African wild cat (ocreata) 1; Indian desert cat (ornata) 1; European wild cat (silvestris) 141; Palestine wild cat (tristrami) 2
Pallas’ cat (Otocolobus manul): Siberian Pallas’cat (manul) 37
Canadian lynx (Lynx canadensis) 13
Eurasian lynx (L lynx) 125: Carpathian lynx (carpathicus) 44; Central Asian lynx (isabellinus) 7; Northern lynx (lynx) 207;
Siberian lynx (wrangeli) 16
Iberian lynx (L pardinus) 4
Bobcat (L rufus) 23
Caracal (Caracal caracal) 51: Common caracal (caracal) 17; Turkmenian caracal (michaelis) 1; Schmitz’s caracal (schmitzi) 2
Serval (Leptailurus serval) 138
Cougar (Puma concolor) 101: Missouri cougar (missoulensis) 2; Chilean cougar (puma) 2
Jaguarundi (Herpailurus yagouarundi) 29
Cheetah (Acinonyx jubatus): South African cheetah (jubatus) 118; Sudan cheetah (soemmeringii) 17
Geoffroy’s cat (Leopardus geoffroyi) 31
Ocelot (L pardalis) 60
Oncilla (L tigrinus) 3: Southern oncilla (guttulus) 2
Margay (L wiedii): Central American margay (nicaraguae) 1; Yucatan margay (yucatanicus) 16
Leopard cat (Prionailurus bengalensis) 3: Indochinese leopard cat (bengalensis) 14; Tsushima leopard cat (euptilura) 19; Palawan leopard cat (heaneyi) 5
Rusty-spotted cat (P rubiginosa): Sri Lankan rusty-spotted cat (phillipsi) 16
Fishing cat (P viverrinus) 43
Asian golden cat (Catopuma temminckii): South-east Asian golden cat (temminckii) 6; Tibetan golden cat (tristis) 2
Clouded leopard (Neofelis nebulosa): Indochinese clouded leopard (nebulosa) 42
Lion (Panthera leo) 245: Southwest African lion (bleyenberghi) 24; Southeast African lion (krugeri) 52; Barbary lion (leo) 29; Asiatic lion (persica) 44; Somali lion (somaliensis) 1; Kalahari lion (vernayi) 5
Jaguar (Panthera onca) 103: Amazon jaguar 1
Leopard (P pardus) 61: Caucasian leopard (ciscaucasica) 1; Indian leopard (fusca) 1; North Chinese leopard (japonensis) 27; Sri Lankan leopard (kotiya) 24; Javan leopard (melas) 4; Arabian leopard (nimr) 3; Amur leopard (orientalis) 54; African leopard (pardus) 5 ; North Persian leopard (saxicolor) 39; Central African leopard (shortridgei) 1
Tiger (P tigris) 168: Siberian tiger (altaica) 177; Malayan tiger (jacksoni) 9; Sumatran tiger (sumatrae) 53
Snow leopard (P uncia) 99
This gives a minimum number of individuals per species: Tiger 407; lion 400; Eurasian lynx 399; leopard 220; wild cat 178; serval 138; cheetah 135; cougar 105; jaguar 104; snow leopard 99; caracal 71; ocelot 60; fishing cat 43; clouded leopard 42; leopard cat 41; jungle cat 39; Pallas’ cat 37; Geoffroy’s cat 31; jaguarondi 29; sand cat 26; bobcat 23; margay 17; rusty-spotted cat 16; Canadian lynx 13; Asian golden cat 8; oncilla 5; Iberian lynx 4
There is a tendency for keeping big cats, rather than small cats. Can't visitors be inspired by small cats? What is the point of 'assurance populations' of mixed subspecies big cats, when ZTL lists no populations of small cats, even though various species were kept in the past? These include the African golden cat, Andean cat, bay cat, black-footed cat, Chinese mountain cat, flat-headed cat, kodkod, marbled cat and pampas cat. I have seen African golden, black-footed and pampas cats, but, like various other small cats, various zoos don't consider them worth keeping or saving, despite the fact that reintroduction programmes could be more easily achieved than with large cats.
There are many more cows in the world than there are big cats in zoos. Using your logic, more people are killed at home than are killed at home, so does that mean that everyone should be homeless?
None of that does anything to disprove my point. Big cats are popular and bring in visitors, and as such most zoos keep them. Most zoos nowadays do not breed generic or genetically invaluable cats, choosing to take part in captive breeding programs for highly endangered subspecies instead (I think Europe is worse than the US for Lions, the AZA focuses solely on
krugeri). As
@Echobeast points out, generic animals are being phased-out, but they still need homes and need proper care/management until they all pass on. You're also ignoring the fact that, since big cats inherently inspire visitors more than small cats, there is a much higher availability of those species than most small felids- which may also often times be harder to breed. At the same time, your numbers show that Eurasian Lynx, the various wildcats, and Serval are all kept more than even the big show species like Cheetah, Jaguar, and Snow Leopard. This, to me, reflects more on how easily a species is bred rather than how interested zoos are in them. Ocelot, Fishing Cat, Sand Cat, Rusty-Spotted Cat, Asian Golden Cat, and the two oncilla species are all much harder to breed in captivity than big cats and the latter two populations are not viable long term unfortunately. Iberian Lynx also is a very, very managed population and is extremely difficult or even zoos within their range to acquire. Interest will play a role yes, but interest doesn't mean much if there's no availability. I know for a fact that there have been very serious attempts made by western zoos to acquire several of the species you listed for endangered small cats not represented in zoos but thus far none of come through for various reasons, none of which were lack of interest.
You talk about generic animals as though they're worthless to the zoological and conservation community, but you realize that the European populations of Serval, Cougar, Caracal, Ocelot, Jungle Cat, and Bobcat are all mostly non-subspecies right? With the exception of the Ocelot (which has a subspecies population in US zoos), none of these species are endangered either so by your own points, should be phased out as worthless to conservation as well.
I think the final point is that, again, big cats bring in visitors more than small cats will. Without them, many smaller zoos could not pull in the attendance they need to be able to work with smaller, lesser known taxa. Hamerton Zoo is an excellent example of this. Hamerton keeps white tigers in a non-breeding situation, but they do this because white tigers bring in visitors. The added attendance is what allows them to be able to work with rare species such as Malayan Tiger, Rusty-Spotted Cat, Northern Oncilla, Canada Lynx, Jaguarundi, Greater Grison, Corsac Fox, Javan Binturong, both Aardwolf, Red-Collared Lemur, and now all of the various Australian animals they've been bringing in.
~Thylo