Nonsense. There are plenty of "ethical consequentialist" vegetarians who don't care about animal welfare but believe eating meat is unethical because it harms the environment or exacerbates human poverty and hunger.
With animal rights or welfare, not engaging in or supporting specific uses of animals seems like the most obvious thing that one can do to promote or respect these values (but if papers like this are right, maybe that's an illusion!).
> Some consequentialists may be vegetarian because of environmental concerns, and others for non-consequentialist reasons, but these are not my main focus here.
as acknowledging that there are other kinds of consequentialists, those that have other ethical reasons for not eating meat, but that he's not talking about them.