Janne B. Haugen

• PhD
• PostDoc at NOAA Fisheries

Effective management of ocean resources is crucial for achieving desired ecological, economic, and social outcomes. Marine ecosystem-based management (EBM) offers a comprehensive approach to achieve these goals, yet its implementation has been challenging and its effectiveness has been unclear. Therefore, we need performance measures to assess the...

Marine ecosystem-based management (EBM) is globally acknowledged as the best practice to manage resources and mitigate multi-sector conflict in the multiple uses of ocean resources, yet EBM is not being implemented or executed at a level that is necessary to effect significant and positive changes in marine ecosystems. Furthermore, continuation of...

Marine ecosystem-based management (EBM) is recognized as the best practice for managing multiple ocean-use sectors, explicitly addressing tradeoffs among them. However, implementation is perceived as challenging and often slow. A poll of over 150 international EBM experts revealed progress, challenges, and solutions in EBM implementation worldwide....

Climate change will disrupt many aspects of the marine environment, with anticipated effects for half of northeastern U.S. fisheries. To mitigate effects of climate change, the United States has designated 90,650 km2 (35,000 mi2) of ocean for offshore wind energy development, but this growing industry could impact fisheries in the region. Hence, th...

Multispecies models have existed in a fisheries context since at least the 1970s, but despite much exploration, advancement, and consideration of multispecies models, there remain limited examples of their operational use in fishery management. Given that species and fleet interactions are inherently multispecies problems and the push towards ecosy...

We conducted an interdisciplinary review of available information (i.e., genetics, life-history, and movement) to evaluate the stock structure of a previously targeted shark species, the porbeagle (Lamna nasus), in the North Atlantic. Most available information supports the conclusion that porbeagle consist of a single genetic population in the Nor...

A minimum of 20 porbeagles Lamna nasus were observed circling the Alba oil platform (UK North Sea) over several days in July 2014. Although schools of fish often aggregate around oil platforms, less is known about their ability to aggregate pelagic sharks and L. nasus are rarely seen at the surface. This unusual observation provides new insights in...

The ICES Working Group on Elasmobranch Fishes (Co-chairs, Samuel Shephard, Ire-land and Paddy Walker, Netherlands) was held at IPMA, Lisbon, Portugal from 31st May to 7th June 2016.

Female spiny dogfish experienced high fishing pressure on the US east coast during the 1990’s. This led to a skewed population sex-ratio of 7 males per female which later declined to 4:1 as the stock was rebuilt. The current fishery still targets mature females, resulting in artificially high abundances of male spiny dogfish. Members of the fishing...

WKSHARKS met in Lisbon, Portugal, 19–22 January 2016, to examine the management of landings data of elasmobranchs (sharks and skates). ICES provides advice for 55 elasmobranch stocks (18% of all ICES stocks) and 16 ICES countries catch elasmobranchs. To complicate matters further, over 150 generic or species-specific codes may be used for submissio...