The body is usually divided into cephalothorax and abdomen. 體軀通常分為頭胸部和腹部?jì)刹糠帧?/li>
They have sturdy structure and well-developed body, higher reproductivity, better adaptability, heat tolerance and easy feeding and management. 體質(zhì)結實(shí),體軀發(fā)達,繁殖率高,適應性強,耐熱,耐粗飼。