Stock assessment of the marine fish species in the Black Sea (Russian waters) in 2021

• Main Authors: Shlyakhov, Vladislav, Piatinskii, Mikhail
• Format: Article in Journal/Newspaper
• Language: Russian
• Published: 2023
• Subjects: Оценка запасов; Пелагические рыбы; Черноморские рыбы; Sprattus sprattus; Engraulis encrasicolus maeoticus; Trachurus mediterraneus ponticus; Scophthalmus maximus; Merlangius merlangus; Spicara flexuosa; Liza haematocheilus; Mullus barbatus; Fisheries data; Aquatic biological resources; Mathematical methods; Fish stock units; ASFA_2015::S::Stock assessment; ASFA_2015::F::Fishery regulations; ASFA_2015::F::Fishing mortality; Turbot; spiny dogfish
• Online Access: http://hdl.handle.net/1834/42782; https://doi.org/10.47921/2619-1024_2023_6_3_96

Based on the available biological and fisheries data, stock status review for 18 units of the fish species inhabiting the Black Sea and the both Azov and Black Seas is presented. A modified version of the traditional approach to the harvest control rules for the aquatic bioresources of the Azov and Black Sea Fishery Basin is described for the case when they are assessed by the mathematical methods to estimate the current stock biomass and fishing mortality. For 11 stock units, analytical modeling including cohort, production and trend models has been applied. Based on the estimates of biomass and fishing mortality concerning biological reference points, in 2021, the status of six stock units of the marine fish species inhabiting the basin and exploited by the Russian fisheries was identified as increasing or stable (“Black Sea” stock units of the European sprat and European anchovy, “Crimean” stock unit of turbot, “Crimean and Caucasian” stock unit of red mullet, and “Black and Azov Seas” stock units of garfish and rays). Five fishery stock units (“Crimean and Caucasian” of mullets, picarel and Mediterranean horse mackerel, “Black and Azov Seas” of sand smelts, and “Caucasian” of turbot) have shown a decreasing trend in terms of abundance, and for the rest of the investigated fish stock units (“Mediterranean migrant” bluefish, Atlantic bonito and Atlantic mackerel, “Black Sea” whiting, so-iuy mullet and the other marine fish species, “Black and Azov Seas” spiny dogfish), the status has not been determined due to the absence of systematic biological and fishery data. Представлен обзор состояния 18 единиц запаса черноморских и черноморско-азовских рыб на основе имеющихся сведений о биологии и промысле этих видов в водах России. Описана модификация традиционного подхода к обоснованию правила регулирования промысла водных биоресурсов Азово-Черноморского рыбохозяйственного бассейна, оцениваемых математическими методами, позволяющими определять текущие величины биомассы запаса и промысловой смертности. Для 11 единиц ...