Most authorities recognize three species within the perch genus: 1  The European perch (Perca fluviatilis) is found in Europe and Asia. 2  The Balkhash perch (Perca schrenkii) is found in Kazakhstan, (in Lake Balkhash and Lake Alakol), Uzbekistan, and China.
Foods to avoid with diverticulitis. In the past, doctors had recommended that people with diverticular disease (diverticulosis or diverticulitis) avoid hard-to-digest foods such as nuts, corn, popcorn or seeds, because of the risk that these foods may get stuck in the diverticula and lead to inflammation.
1 Eat more fiber. 2  High-fiber foods, such as fresh fruits and vegetables and whole grains, soften waste material and help it pass more quickly through your colon. 3  This reduces pressure inside your digestive tract. 4  However, it isn't clear whether a high-fiber diet decreases the risk of diverticulitis.