Chapter 1 Introduction Section 1 Basic concepts and characteristics of fishery resources Section 2 Concept and research content of the biology of fishery resources Section 3 Significance of biological studies on fishery resources Chapter 2 Fish population and its research methods Section 1 Basic concepts of Population Section 2 Population structure and its change rule Section 3 Methods of population identification Section 4 Molecular phylogeography Section 5 Population growth and its regulation Section 6 Case study of population identification Chapter 3 Life History and early development of fish Section 1 Life History and life span of fish Section 2 Early development of fish Section 3 Main points of morphology and identification of fish eggs, larvae and juveniles Section 4 Analysis of environmental factors affecting larval survival Chapter 4 Fish age and growth Section 1 Significance of studying fish age and growth Section 2 General principles of ring formation and their identification materials Section 3 Scale structure and fish age identification Section 4 Fish otoliths and age identification Section 5 Lipofuscin and age identification of crustaceans Section 6 Identification of the beak and age of Cephalopod Section 7 Other identification methods of the age of fishes Section 8 Fish growth and its determination method Chapter 5 Sexual maturation, reproductive habits and fecundity of fish Section 1 Sexual characteristics and sexual maturation of fish Section 2 Breeding habits Section 3 Concept and measuring method of fecundity Section 4 Fish breeding strategy Section 5 Case study: Sexual maturation and reproductive habits of cephalopods Chapter 6 Fish food, feeding habits and interspecific relationship Section 1 Fish feeding relationship and food chain Section 2 Fish feeding type Section 3 Feeding characteristics of fish Section 4 Food security of Fish Section 5 food intake of fish study method Section 6 Fatness and fat content Chapter 7 Fish aggregations and migratory distributions Section 1 Fish aggregations Section 2 Migration distribution of fish Section 3 Research methods of fish migration

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