Rockfish Research in Alaska - NOAA Fisheries
Currently, 33 species of rockfish are recognized in Alaska waters. We collect information on the number, age, length, weight, and biology (such as maturity and genetics) of many of these rockfish species during bottom trawl and longline surveys …
For the purposes of sport fishery management, rockfish are divided into two groups, pelagic and non-pelagic. Bag and possession limits difer for the two groups in many areas, so it is important to be able to distinguish them. This chart shows the most common species in each group.
Rockfish Identification Manual - NOAA Fisheries
2017年12月13日 · This rockfish guide includes color images of 37 species (genera: Sebastes, Sebastolobus, and Adelosebastes) photographed under natural and electronic flash conditions in the field. Most specimens were photographed immediately after collection.
Alaska Seafloor Habitat and Rockfish Studies | NOAA Fisheries
We study the Alaska seafloor to identify essential fish habitat, determine the effects of fishing on benthic habitat, improve stock assessments, and understand basic ecological processes and life histories of benthic organisms. Seafloor habitat mapping is increasingly being integrated with these long-term objectives.
The pelagic shelf rockfish assemblage in the Gulf of Alaska is comprised of three species: dusky rockfish ( Sebastes ciliatus ), yellowtail rockfish ( S. flavidus ), and widow rockfish ( S. entomelas ).
ALEUTIAN SCORPIONFISH Adelosebastes latens SHORTSPINE THORNYHEAD Sebastolobus alascanus LONGSPINE THORNYHEAD Sebastolobus altivelis SHORTRAKER ROCKFISH Sebastes ...
There are over 30 species of rockfish in Alaska. If the rockfish is not featured in the pelagic category, then for the purposes of regulation it is a nonpelagic rockfish. Bottom-dwelling species found on or near the ocean floor, usually in rocky or boulder-strewn habitat. Extremely long-lived (most fish are 15-75 years old).
Six pelagic species of rockfish are often found mid-water in schools, close to rocky structures. These Pelagic Rockfish: fish are moderately long-lived (most fish are 7-30 years old).
In 1998, black and blue rockfish were removed from the GOA FMP and management was conferred to the ADF&G. In 2008, dark rockfish were similarly removed from the GOA FMP with sole management taken over by the ADF&G. Beginning in 1999, osmerids (eulachon, capelin and other smelts) were removed from
The Other Rockfish complex in the Gulf of Alaska (GOA) is assessed on a biennial stock assessment schedule to coincide with the availability of new trawl survey biomass estimates. The Other Rockfish complex consists of twenty-seven non-target rockfish species (Sebastes spp.) that are managed in three tiers. There is one species