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Recruitment decline in North Sea herring is accompanied by reduced larval growth rates
(Journal article; Peer reviewed, 2013-08-28)
The stock of North Sea autumn spawning herring Clupea harengus (L.) has shown an unprecedented 10 yr sequence of sharply reduced recruitment, in spite of a high spawning biomass. Recent work has identified this below-expected ...
High prevalence of viral haemorrhagic septicaemia virus (VHSV) in Norwegian spring‑spawning herring
(Journal article; Peer reviewed, 2013-03-25)
Viral haemorrhagic septicaemia (VHS) is a viral disease known to cause high mortality in many teleost species, both in wild and farmed populations. The effects of this virus infection on the population dynamics of Atlantic ...
Establishment of new wintering areas in herring co-occurs with peaks in the ‘first time/repeat spawner’ ratio
(Journal article; Peer reviewed, 2010-06-23)
Norwegian spring spawning (NSS) herring migrate to wintering areas in late summer and remain there for about 5 mo in dense aggregations. First-time spawning cohorts typically adopt the wintering area of the spawning stock. ...
Long-term changes in the total egg production of Norwegian spring-spawning herring Clupea harengus (L.)—Implications of variations in population structure and condition factor
(Journal article; Peer reviewed, 2010-05)
The reproductive potential of Norwegian spring-spawning herring (Clupea harengus) was estimated in terms of total egg production (TEP) for the period 1935–2005, using a model where spawning stock numbers (SSN)-, weight- ...
Do accurate stock estimates increase harvest and reduce variability in fisheries yields?
(Journal article; Peer reviewed, 2011-03-22)
Fisheries managers normally make decisions based on stock abundance estimates subject to process, observation, and model uncertainties. Considerable effort is invested in gathering information about stock size to decrease ...
Observing the behavioral response of herring exposed to mid-frequency sonar signals. (A)
(Conference object, 2010-03)
There is general concern on how mid-frequency military sonars might affect aquatic animals. Approaches used to investigate possible effects on Norwegian spring spawning herring (Clupea harengus) are presented. Experiments ...