Table 2. Change in spatial distribution of adult fish in the Northeast U.S. Shelf Ecosystem.
Distribution in the annual relative proportions among strata between 1977–1987 and 1999–2008 of spring- and fall-collected adult fish were tested separately using Kruskal-Wallis chi-square. By examining changes in slopes using linear analyses, changes were analyzed in: the along-shelf, the cross-shelf, and the depth directions. Results were classified into categories for each distributional shift: no significant change (blank), southward shift (South), northward shift (North), inshore shift (In), offshore shift (Off), shallower (Shallow), and deeper (Deep). Spatial shifts were examined relative to regional occurrence (M—GB = Mid-Atlantic Bight to Georges Bank, S—GOM = Southern New England to Gulf of Maine, and GB—GOM = Georges Bank to Gulf of Maine), management status (M = managed, N = not managed), and habitat type (D = demersal, P = pelagic).
| Spring Survey | Fall Survey | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Family | Taxon | Region | Managed | Habitat | Along-Shelf | Cross-Shelf | Depth | Along-Shelf | Cross-Shelf | Depth |
| Squalidae | Squalus acanthias | S—GOM | M | D | South | |||||
| Rajidae | Amblyraja radiate | GB—GOM | M | D | ||||||
| Leucoraja erinacea | M—GB | M | D | South | South | |||||
| Leucoraja garmani | M—GB | M | D | |||||||
| Leucoraja ocellata | S—GOM | M | D | |||||||
| Malacoraja senta | GB—GOM | M | D | North | ||||||
| Raja eglanteria | M—GB | M | D | Deep | ||||||
| Clupeidae | Clupea harengus | S—GOM | M | P | Off | Deep | ||||
| Gadidae | Gadus morhua | S—GOM | M | D | Deep | |||||
| Melanogrammus aeglefinus | GB—GOM | M | D | |||||||
| Pollachius virens | GB—GOM | M | P | Deep | Deep | |||||
| Lotidae | Brosme brosme | GB—GOM | M | D | ||||||
| Enchelyopus cimbrius | S—GOM | N | D | |||||||
| Phycidae | Urophycis chuss | S—GOM | M | D | North | In | Deep | North | In | Deep |
| Urophycis tenuis | S—GOM | M | D | North | Deep | Deep | ||||
| Merlucciidae | Merluccius albidus | S—GOM | M | P | South | Shallow | ||||
| Merluccius bilinearis | S—GOM | M | P | North | In | Deep | North | In | ||
| Lophiidae | Lophius americanus | S—GOM | M | D | North | Deep | ||||
| Sebastidae | Sebastes spp. | GB—GOM | M | D | Off | |||||
| Cottidae | Myoxocephalus octodecemspinosus | S—GOM | N | D | North | |||||
| Serranidae | Centropristis striata | M—GB | M | D | ||||||
| Pomatomidae | Pomatomus saltatrix | M—GB | M | P | ||||||
| Sparidae | Stenotomus chrysops | M—GB | M | P | ||||||
| Sciaenidae | Cynoscion regalis | M—GB | M | D | North | |||||
| Leiostomus xanthurus | M—GB | M | D | |||||||
| Micropogonias undulatus | M—GB | M | D | In | ||||||
| Zoarcidae | Zoarces americanus | S—GOM | M | D | North | |||||
| Anarhichadidae | Anarhichas spp. | GB—GOM | M | D | In | |||||
| Ammodytidae | Ammodytes spp. | S—GOM | N | D | ||||||
| Scombridae | Scomber scombrus | S—GOM | M | P | North | In | North | |||
| Stromateidae | Peprilus spp. | M—GB | M | P | In | In | Shallow | |||
| Scophthalmidae | Scophthalmus aquosus | M—GB | M | D | North | |||||
| Paralichthyidae | Citharichthys arctifrons | M—GB | N | D | North | In | ||||
| Paralichthys dentatus | M—GB | M | D | North | North | |||||
| Paralichthyidae | Hippoglossina oblonga | M—GB | N | D | Deep | North | ||||
| Pleuronectidae | Glyptocephalus cynoglossus | M—GB | M | D | Deep | |||||
| Hippoglossoides platessoides | GB—GOM | M | D | Off | Off | |||||
| Hippoglossus hippoglossus | GB—GOM | M | D | |||||||
| Limanda ferruginea | S—GOM | M | D | North | Deep | |||||
| Pseudopleuronectes americanus | S—GOM | M | D | |||||||