CONTENTS 



Introduction. 



Page 

 1 



1 Identity 1 



1.1 Nonnenclature . 1 



1.2 Taxonomy 1 



1.3 Morphology 3 



2 Distribution 3 



2.1 Total area 3 



2.2 Differential distribution. . 5 



2.3 Determinants of distribution changes 5 



2.4 Hybridization 5 



3 Bionomics and life history 5 



3.1 Reproduction • 5 



3.2 Pre-adult phase V 



3.3 Adult phase 11 



3.4 Nutrition and growth 11 



3.5 Behavior 12 



4 Population 12 



4.1 Structure 12 



4.2 Abundance and density (of population) 12 



4.3 Natality and recruitment 12 



4.4 Mortality and morbidity 12 



4.5 Dynamics of population (as a whole) 12 



4.6 The population in the community and the ecosystem 12 



5 Exploitation. 13 



5.1 Fishing equipment 13 



5.2 Fishing areas 13 



5.3 Fishing seasons 13 



5.4 Fishing operations and results 13 



6 Protection and management 13 



6.1 Regulatory (legislative) measures 13 



6.2 Control or alteration of physical features of the environment. 14 



6.3 Control or alteration of chemical features of the environment. 14 



6.4 Control or alteration of the biological features of the environ- 

 ment 14 



6.5 Artificial stocking 14 



