Survival is a game of calories. You are constantly trying to mitigate calorie loss and look for sources of calories that make sense. If you spend an hour trying to grab a small fish in a frigid pool of water, you’ve lost hundreds of calories to gain just a few calories (and that’s assuming that you catch the little fish). It just doesn’t make sense. Sure, you’re hungry and bored, but the reward has to justify the expense. Stay mindful of your calorie intake and expenditures, and you’re more likely to make smart choices.
TIM MACWELCH, “3 Tricks for Staving Off Hunger in a Survival Situation”, Outdoor Life, June 20, 2017