Northern shrimp (Pandalus borealis
) is found in the Northwest Atlantic from Baffin Bay to the Gulf of Maine where the highest population densities occur in water temperatures of 0-4?C, most frequently at depths of 150-600 m and typically over soft muddy substrates. As a protandric hermaphrodite, northern shrimp mature first as a male but change sex at an age of around 3 to 7 years old and complete the remainder of their live cycle as a female. Shrimp spawn from late summer to autumn, and females carry their eggs until spring when the larvae hatch. Some females may survive to repeat the spawning process in succeeding years. Natural mortality seems to be most pronounced immediately following hatching, and most shrimp do not live past age 5. Newly hatched shrimp spend three to four months as pelagic larvae, and at the end of this period they move to deeper waters and take up the life cycle of adults. This species can reach a maximum total length of 120 mm for males and 165 mm for females. They mainly feed on detritus and plankton, and are preyed on by finfish, birds and marine mammals (Skúladóttir, 1998; Idoine, 2006; Aschan et al., 2012).
The widely distributed northern shrimp population inhabiting the waters of East Canada, West Greenland and NAFO Sub-areas 0 and 1 is assessed as a single stock. The northern shrimp stock off West Greenland is distributed mainly in NAFO Subarea 1, but a small part of the stock intrudes into the eastern edge of Division 0A. Canada has defined Shrimp Fishing Area (SFA) 1 to be the part of Division 0A, lying east of the deepest water in the Davis Strait.
Aschan, M., Powles, H., Angel, J. 2012. MSC Assessment Report for the Canadian Offshore Northern Shrimp (Pandalus borealis) trawl fishery - Shrimp Fishing Area 1. Client: Canadian Association of Prawn Producers (CAPP) and the Northern Coalition (NC). Version: Final Report Draft. 176 pp.
Idoine, J. 2006. Northern shrimp. Status of Fishery Resources off the Northeastern US NEFSC - Resource Evaluation and Assessment Division. 13 pp.
Skúladóttir, U. 1998. Size at sexual maturity of female Northern Shrimp (Pandalus borealis Krøyer) in the Denmark Strait 1985–93 and a comparison with the nearest Icelandic shrimp populations. J. Northw. Atl. Fish. Sci., 24: 27–37.