This isn't quite exact, but 1/4 cup of butter (so a half stick if you're in the US) is 57 grams according to the conversion chart from allrecipes below. So use just a slightly heavy 1/4 cup or 1/2 stick.
Yellowtail, including Yellowtail Jack (Seriol landei), are recognized by a yellow stripe across their body and their yellow tail. Range & Habitat: Yellowtail is caught year round, but more commonly during summer in the Pacific Coast and the Sea of Cortez. They are caught primarily with hook and line, and their average weight is 10 to 20 lbs.
Montana Field Guides. The common name Black-tailed Jack Rabbit is derived from the prominent black coloration on the dorsal surface of the tail (the ventral side is colored white). The Black-tailed Jack Rabbit is a medium sized hare with exceptionally long ears and hind legs. The average weight of two male specimens from Montana was 2.0 kilograms; and 2.6 kilograms for four non-pregnant females (Foresman 2012b).