spring-spawning

The spring-spawning stock still shows no sign of recovery, while the summer-spawning stock recovered a few years after a fishing ban was imposed in the early 1970s [46].

Fisheries and aquaculture in the Central North Atlantic (Iceland and Greenland) 2009

It seems that, like the West Greenland cod, the Icelandic spring-spawning herring had difficulties in self propagation in cold periods and would probably have collapsed in the late 1960s and early 1970s, even without a fishery [47].

Fisheries and aquaculture in the Central North Atlantic (Iceland and Greenland) 2009

The abundance of the Norwegian spring-spawning herring stock increased dramatically in the 1990s (see section 13.2.2.5) and regained some semblance of its previous feeding pattern (for an overview of these changes see Chapter 9).

Fisheries and aquaculture in the Central North Atlantic (Iceland and Greenland) 2009

Variations in abundance of Norwegian spring-spawning herring throughout the 20th century and the influence of climatic fluctuations.

Fisheries and aquaculture in the Northeast Atlantic (Barents and Norwegian Seas) 2009

In the early 1950s, the spawning stock of Norwegian spring-spawning herring was estimated at 14 million t – one of the largest fish stocks in the world.

Fisheries and aquaculture in the Northeast Atlantic (Barents and Norwegian Seas) 2009

It took the Norwegian spring-spawning stock about two and a half decades to recover despite severe catch restrictions.

Fisheries and aquaculture in the Central North Atlantic (Iceland and Greenland) 2009

The degree of reduction is very likely to be sufficient to enable the Norwegian spring-spawning stock to again take advantage of the rich supply of '' Calanus finmarchicus '' over the north Icelandic shelf.

Fisheries and aquaculture in the Central North Atlantic (Iceland and Greenland) 2009

Presently, Norwegian spring-spawning herring still overwinter in the Lofoten area on the northwest coast of Norway.

Fisheries and aquaculture in the Central North Atlantic (Iceland and Greenland) 2009

The fall and rise of the Norwegian spring-spawning herring

Fisheries and aquaculture in the Northeast Atlantic (Barents and Norwegian Seas) 2009

Another example is that of the Norwegian spring-spawning herring: following more than two decades of effort at rebuilding the stock on the part of Norwegian authorities, in the mid-1990s the stock began to migrate from the Norwegian EEZ and into international waters for parts of the year.

Fisheries and aquaculture in the Northeast Atlantic (Barents and Norwegian Seas) 2009