Nematoda 



Distribution of infection 

 Host specificity 



Experimental analysis 

 Acanthocephala 



Distribution of infection 

 Incidence of infection 



Intensity of infection 

 Parasite systematics 



Hirudinea 



Parasite systematics 

 Host specificity 

 Copepoda 



Parasite systematics 



Distribution 



Population changes 

 Population density 



Circadian rhythms 



Seasonal changes 



Experimental analysis 

 Reproductive season 

 Gut contents 



Change with age 

 Habitat preference 



Fish control agents 

 Copper sulfate 



Outdoor census a: 

 Effect on fish 

 Toxaphen 



Outdoor census a: 

 Effect on fish 

 Melanogrammus aeg/efim 

 Meristics 



Gill rakers 

 Oxygen consumption 



Exercise 

 Axial skeletal muscles 

 Enzymology 

 Biochemistry 

 Spoilage problems 

 Otoliths 



Ultrastructure 

 Function 

 Development 

 Biochemistry 

 Function 

 Development 

 Dextrality or sinistn 

 Gas bladder 

 Anatomy 

 Histology 

 Development 

 Fecundity 



Change with age 

 Infraspecific 



Aminotransferases 

 Enzymology 

 Biochemistry 

 Mathematical growth analysis 

 Age length relationship 



Population changes 



Population density 

 Age class distribution 



806904 

 806444 

 806904 



804221 



807408 

 807531 

 804352 

 806282 

 806415 

 806635 

 806834 

 807358 

 807435 

 807008 

 807222 

 808215 

 808464 



805108 

 806635 

 806635 



803935 

 806659 

 807222 



808212 

 803568 



803878 

 803878 

 807075 



807350 

 805288 

 805289 

 805290 

 805291 

 805293 

 805287 

 804407 

 804691 

 804691 

 805274 

 805284 

 805285 

 808092 

 805288 

 805289 

 805290 

 808036 

 808037 



Young 

 Availability and use of food 

 Reproductive season 

 Swimming speed 



Experimental analysis 

 Feeding 



Gut contents 



Change with age 

 Seasonal changes 

 Avoidance responses 



Trawling 

 Migrations 

 Pug head 



Anatomy 

 Fishery dynamics 



Computer analysis 

 Population dynamics 

 Trawling 



Experimental analysis 



Me/anon us 



Vertical distribution 

 Distribution 

 Melanonus gracilis 

 Relationships 

 Caudal skeleton 

 Anatomy 



Descriptive evolution 

 Telencephalon 



Aural gas bladder diverticula 

 Melanonus zugmayeri 

 Caudal skeleton 

 Anatomy 



Descriptive evolution 

 Merlangius cognatus 

 Synonymy 

 Otoliths 

 Miocene 

 Merlangius merlangus 

 Meristics 



Gill rakers 

 Nitrogen metabolism 

 Experimental analysis 

 Descriptive evolution 



Scle 



and 



Carbohydrate content 

 Biochemistry 

 Gills 



Surface volume relationship 

 Change with age 

 Gas bladder 



Use in systematics 

 Anatomy 

 Function 

 Yolk 



Ultrastructure 

 Age length relationship 



Geographic variation 

 Rate of growth 



Incidence of infection 

 Natural mortality 

 Water pressure 

 Effect on fish 

 Hydrostatics 

 Monogenea 



Incidence of infection 

 Distribution of infection 

 Intensity of infection 

 Digenea 



Parasite systematics 

 Nematoda 



Seasonal changes 



Incidence of infection 

 Intensity of infection 

 Copepoda 



Incidence of infection 

 Distribution of infection 

 Host parasite 

 Population changes 

 Population density 



Age class distribution 



803568 

 805287 

 806555 



807421 

 806327 

 806317 

 805287 



808445 



807262 

 805858 

 805858 



807965 

 807965 

 807965 



807954 

 807954 



806825 

 805294 

 805295 

 805296 



808039 

 808040 

 808092 



805294 

 805295 

 805296 

 807104 

 807104 

 808041 

 808042 

 808043 

 808044 

 808100 



Gadidae 

 (continued) 



to 



Merlangius 



393 



