КамчатНИРО
91
yearsKamchatka Research Institute of Fisheries and Oceanography
years
Journal / Archives
УДК 597.553.2:59.087 DOI: 10.15853/2072-8212.2017.47.77-90Download the full article
Using the photo- and video records for assessment of Pacific salmon escapement on migration routes and spawning grounds: some of methodical approaches
As checking salmon escapement from the air (helicopter) is getting less extensive and detailed in Kamchatka, making photographies of spawning grounds has been resumed in two versions – from the shores and from the air (quadrocopter), and method of assessment of salmon escapement via statistical analysis of the photo-data was proposed based on obtained photographs of spawning grounds and migration routes. The essence is to figure out the number of the fish on calculated average values for each of loci and interpolating with the use of GPS-tracks. To legalize the method there was a comparison provided in 2017 between expert and methodical estimations for sockeye salmon in the basin of Nachikinskoye Lake, where early and late races spawned. It is demonstrated that the error (underesimation) for the late race was from 4 to 77%. Sockeye salmon escapement was evaluated based on the data. Discussion of the details of the method and versions of application and processing the data is provided.