Waters, Todd Miller, Emily Fergusson, Dion Oxman, Beverly Agler, and Edward Farley Jr.īrian P.V. Winter Condition and Trophic Status of Pacific Salmon in the Gulf of AlaskaĬharles D. Richard Beamish, Chrys Neville, and Vladimir Radchenko Ocean Ecology of Coho Salmon in the Gulf of Alaska in the Winter Shigehiko Urawa, Terry Beacham, Ben Sutherland, and Shunpei Sato Winter Distribution of Chum Salmon in the Gulf of Alaska: A Review Inter-comparison of Bongo and Juday Nets Size-fractionated Zooplankton Biomass Collected in the Gulf of Alaska During 2019Įvgeny A. Trends in the observations at Ocean Station P and Relevance to the Two Expeditions New Information about the Ocean Ecology of Sockeye Salmon and Relevance to Populations in the Fraser River, British Columbia To the Question of the Use of Climatic-Oceanological Predictors to Forecast Pacific Salmon Stock Abundance in KamchatkaĪlexander V. Squid Abundances and Relevance, Gulf of Alaska Expeditions 20 Ming, Shaorong Li, Gideon Mordecai, Angela Schulze, and Kristina M. Somov, Svetlana Esenkulova, Emiliano Di Cicco, Karia H. Pathogens and Stressors of Overwintering Salmon in the Gulf of AlaskaĬhristoph M. Predation on Pacific Salmon on the High Seas Sutherland, Angela Schulze, and Kristina M. Deeg, Svetlana Esenkulova, Shaorong Li, Brian P.V. MillerĮnvironmental DNA Survey of the Winter Salmonosphere in the Gulf of AlaskaĬhristoph M. Ming, Colin Wallace, Kim Jonsen, Kelsey L. Vishnu Perumthuruthil Suseelan and Maycira CostaĪt-Sea Genetic Stock Identification in the Gulf of AlaskaĬhristoph M. Hunt, Alexei Somov, Natalie Mahara, and International TEAM 2019–2020ĭynamics of Phytoplankton Biomass in the Gulf of Alaska Derived from Sentinel 3 OLCI Imagery Oceanographic Conditions During the Gulf of Alaska 20 ExpeditionsĮvgeny A. Winter Ecology of British Columbia Chum Salmon in the Gulf of Alaska Port State Measures Agreement Implementation.All ages have been validated by an independent expert and the results will be published in the ‘2014 Ness System Scale Sampling Programme’ report. A proportion of these were photographed and annotated images shared with the angler who caught the fish. Samples had been submitted from a total of 75 adult salmon captured across the Ness system during the 2014 season. This region is known as an annual ‘check’ or ‘annuli’, the number of which can be used to determine the age of the fish.Īnnotated photograph of a scale from a 9lb ‘spring’ salmon caught on the River Moriston When the fish begins to grow again a new ridge is formed which ‘cuts across’ the incomplete circuli. In the colder months growth slows down and the circuli form closer together. The circuli are formed as the scale pushes against the dermis and the pressure forms ridges on the scale which then become calcified.īasic markings and structure of a generalised fish scaleĭuring the summer months the fish grows quickly. When the scales are attached to the fish they are held in pockets. Bands of individual lines known as ‘circuli’ radiate out from the centre of the scale, the ‘Focus’. Many of the skeletal structures of fish exhibit growth rings scales are usually chosen because they can be sampled without sacrificing the fish. Physiological changes such as maturation or smoltification can also be seen in salmon. It allows growth rates to be calculated, estimates of annual survival to be made and strong and weak year-classes of fish to be identified. The ageing of fish is an important fisheries management tool. 2014 saw the introduction of a comprehensive salmon scale sampling and ageing programme on the Ness Catchment.
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