FISHERY BULLETIN: VOL. 82. NO. 2 



SITE GROUPS 



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SPRING CRUISES 



FIGURE 9.— Nodal constancy 1A1 and 

 fidelity 1B1 diagrams showing the inter- 

 relation between pooled site and species 

 groups. NMFS Groundfish Survey spring 

 cruises. 1968-76. 



TABLE 4. — Dominant species by site group for Spring NMFS Groundfish Survey cruises. Mid- 

 Atlantic Bight area, 1968-76. A species was considered dominant if it occui red among the five most 

 abundant species at at least 20'/ of all stations in the site group. Figures given are percentage of 

 stations within each site group at which a species occurred ('< i and the average percentage that 

 the species contributed towards total abundance of nonpelagic fishes (x7< i within the site group. 

 Faunal affinities and species groups are as given in Table 3. 



Site group 



Species 



IV 



Gadus morhua 

 Pseudopleuronectes 



americanus 

 Limanda Ferruginea 

 Macrozoarces americanus 

 Myoxocephalus 



octodecemspinosus 

 Rata ennacea 

 Scophthalmus aquosus 

 Hippoglossina oblonga 

 Lophius americanus 

 Merluccius bilmeans 

 Squalus acanthias 

 Urophycis chuss 

 Centropristes striata 

 Paralichthys dentatus 

 Pepnlus triacanthus 

 Pnonotus carolmus 

 Stenotomus chrysops 

 Urophycis regius 

 Chloropthalmus agassizi 

 Helicolenus dactylopterus 

 Merluccius albidus 

 Urophycis tenuis 



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