BIOL 3114 Study Guide - Midterm Guide: Aquatic Feeding Mechanisms, Circulatory System, Shoulder Girdle
22 Oct 2016
School
Department
Course
Professor
Document Summary
Know the other common features: homocercal tail, skull structure and shape, diverse locomotor styles, high fertility and fecundity. Two major lineages are: sarcopterygii fleshy-fined fishes (and tetrapods) Tetrapoda terrestrial and secondarily aquatic vertebrates: actinopterygii ray-finned fishes. Several basal, primitive groups with few species. Teleosteii more than 26,000 species: all marine habitats, almost all freshwater habitats. Feeding: jaws of teleosts are diverse, common feature ability to rapidly protrude jaws away from rest of cranium. Problem swimming pushes water (and food) away from mouth. Solution open mouth rapidly and generate suction that draws water (and food) into buccal cavity: skull and jaw diversity reflects diversity of feeding styles. Differences in reproduction: dioecious separate female and male sexes, hermaphroditism. Sequential begin life as one sex, then change to another. Protogyny vs protandry: synchronous (simultaneous, parthenogenesis, iteroparous spawn multiple times, semelparous spawn once and die, most are oviparous lay eggs, fertilization is external, eggs are normally abandoned, but some groups have parental care.
