БАГАТОРІЧНА ДИНАМІКА ПРОМИСЛУ ТА ВІКОВОЇ СТРУКТУРИ ЧОРНОМОРСЬКОГО ШПРОТУ SPRATTUS SPRATTUS PHALERICUS (RISSO) (PISCES: CLUPEIDAE) В ВОДАХ УКРАЇНИ (КРИМСЬКИЙ РЕГІОН)
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. Absol...
Saved in:
| Date: | 2023 |
|---|---|
| Main Authors: | , , , |
| Format: | Article |
| Language: | Ukrainian |
| Published: |
Marine Ecological Journal
2023
|
| Subjects: | |
| Online Access: | https://mej.od.ua/index.php/mej/article/view/144 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Journal Title: | Marine Ecological Journal |
Institution
Marine Ecological Journal| Summary: | 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. |
|---|