Estimates of global captive vertebrate numbers

Abstract

In this article, I list all the estimates I could find for numbers of vertebrates that are farmed or kept in captivity for various purposes. I also describe some groups of captive vertebrates for which I found no estimates. For some bigger groups of animals that are less well-known amongst animal activists, I also describe trends and main welfare concerns. The purpose of the article is to make it easier to find and compare estimates. Hopefully, this can also help animal advocates decide which issues to focus on. Note that I chose to focus on captive vertebrates simply to limit the scope of the article.