Earth nutation influence on system dynamics of Northeast Arctic cod
نویسندگان
چکیده
منابع مشابه
Food web dynamics affect Northeast Arctic cod recruitment.
Proper management of ecosystems requires an understanding of both the species interactions as well as the effect of climate variation. However, a common problem is that the available time-series are of different lengths. Here, we present a general approach for studying the dynamic structure of such interactions. Specifically, we analyse the recruitment of the world's largest cod stock, the Nort...
متن کاملFisheries change spawning ground distribution of northeast Arctic cod.
Prior to the 1920s, the northeast Arctic (NA) cod were caught at spawning grounds ranging from the southernmost to the northernmost parts of the Norwegian coast, but have for the last 50 yr mainly been caught around the Lofoten archipelago and northwards. The NA cod have their feeding and nursery grounds in the Barents Sea, and migrate south towards the Norwegian coast in the winter to spawn. T...
متن کاملTowards the Optimal Management of the Northeast Arctic Cod Fishery
The objectives pursued by governments managing fisheries may include maximizing profits, minimizing the impact on the marine ecosystem, or securing employment, which all require adjusting the composition of the fishing fleet. We develop a management plan that can be adapted to those objectives and allows the regulator to compare the long-run profits between the various management options. We ap...
متن کاملThe Northeast Greenland Shelf as a Potential Habitat for the Northeast Arctic Cod
Observations (1978–1991) of distributions of pelagic juvenile Northeast Arctic cod (Gadus morhua L.) show that up to 1/3 of the year class are dispersed off the continental shelf and into the deep Norwegian Sea while on the way from the spring-spawning areas along the Norwegian coast to the autumn-settlement areas in the Barents Sea. The fate of this variable fraction of pelagic juveniles off-s...
متن کاملFluctuations of Northeast Arctic Cod Catches: A Review of Possible Sources
Many stocks of Atlantic cod (Gadus morhua) on both sides of the North Atlantic are currently at much reduced levels of biomass, but this situation is not in all instances the result of long, continuous decline. Most Northwest Atlantic stocks declined to low levels during the 1970s, but increased during the 1980s before declining even more severely during the late 1980s and early 1990s. Several ...
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ژورنال
عنوان ژورنال: ICES Journal of Marine Science
سال: 1999
ISSN: 1054-3139
DOI: 10.1006/jmsc.1999.0491