The Winkler Method is a technique used to measure dissolved oxygen in freshwater systems. (https://serc.carleton.edu/microbelife/research_methods/environ_sampling/oxygen.html)
The hock and the tarsus refer to the same joint in quadrupeds. The hock is the common name used primarily in veterinary contexts, while tarsus is the more anatomical term. So, the term "hock" is often used when referring to clinical signs like "hemorrhage of the hock".
