Tiêu đề 1. Introduction Aqua.pdf ✅

Fisheries Program, FAVF A F U © Rahul Ranjan INTRODUCTION Definition General characteristics of fish Fish Production Desirable characters of fish for culture Importance of fish
Fisheries Program, FAVF A F U © Rahul Ranjan DEFINITION • Fish • Cold blooded (??) • Aquatic vertebrates (??) • Breathe by means of pharyngeal gills (?) • Propelling and balancing by means of fins (appendages) • Supported by dermal fin rays
Fisheries Program, FAVF A F U © Rahul Ranjan FISH... • 1 st successful class of chordates • Long evolution • Large number of genera and species • Currently, around 30,000 living species in different aquatic habitats • Cold water- Warm water • Fresh water- Estuarine habitat- Marine habitat • Several adaptive features according to habitat.
Fisheries Program, FAVF A F U © Rahul Ranjan GENERAL CHARACTERISTICS OF FISH • Large no. of genera and species • Large variation • Generalization is difficult • A lot of exceptions •Exceptions- Charm of biology