БАГАТОРІЧНА ДИНАМІКА ПРОМИСЛУ ТА ВІКОВОЇ СТРУКТУРИ ЧОРНОМОРСЬКОГО ШПРОТУ SPRATTUS SPRATTUS PHALERICUS (RISSO) (PISCES: CLUPEIDAE) В ВОДАХ УКРАЇНИ (КРИМСЬКИЙ РЕГІОН)

• Видавець: Marine Ecological Journal
• Дата: 2023
• Автори: Зуєв, Г. В., Бондарєв, В. А., Зав'ялов, А. В., Самотой, Ю. В.
• Формат: Стаття
• Мова: Ukrainian
• Опубліковано: Marine Ecological Journal 2023
• Теми: шпрот; вікова структура; промисел; улов; динаміка; Чорне море; sprat; population; age structure; fishery; landings; dynamics; Black Sea
• Онлайн доступ: https://mej.od.ua/index.php/mej/article/view/144

Inter- and inter-annual dynamics of fisheries and age structure of the Black Sea sprat population Sprattus sprattus phalericus off the Crimean coast for the purpose of its population current state and possible changes assessment on the basis of 12 years (2000 - 2011) data analysis was studied. Absolute values annual landings, ranges of their inter-annual and seasonal variability were shown. Inter-annual differences landings were – 1.9 (11392.7 – 21453.9 t), seasonal – 9.1 (1521.4 – 13818.9 t). The age structure of population was studied and the length-age key was developed. Long-time age structure changes of population were studied. Deterioration of state population and "quality of landings" during 2000 – 2011 was established. The ratio of one year old, two year old and three year old sprat weight landings in 2009 – 2011 was 71.4:27.5:1.1 in comparison with 2000 – 2002 - 21.4:68.3:10.3. Average age of a sprat during this time decreased from 1.64 to 1.15 years old, and the average individual weight decreased from 4.43 to 2.83 g.