Dynamics of codfish stocks in the North Atlantic region
https://doi.org/10.36038/2307-3497-2023-192-55-67
Abstract
Purpose: to investigate the features of the long-term dynamics of codfish stocks in the North Atlantic region as a basis for predicting their state and sustainable fishing (exploitation).
Materials: data on spawning stock biomass, abundance of recruitment at age 0 to 3 years, survival indices at early ontogenesis stage for 11 Atlantic cod stocks, 6 Atlantic haddock stocks, and 4 saithe stocks for the period 1946–2020
Methods: a comparative analysis of the above time series based on their statistical processing.
Novelty: For the first time, a 50–60-year cycle which characterizes the long-term variations of the Atlantic Multidecadal Oscillation index, were revealed in the long-term fluctuations of the Northeast Arctic cod recruitment. This assumes a relationship in the long-term variations of two parameters under consideration.
Results: The significant interannual variability of all characteristics was identified for each of the 21 commercial fish stocks under consideration. Statistically significant positive correlations were found between changes in recruitment abundance of Atlantic cod in the Northwest Atlantic and Atlantic cod, Atlantic haddock, and saithe in the areas of Greenland, Iceland, North and Baltic Seas. Changes in the recruitment abundance of Labrador cod and Northeast Arctic cod in the Barents Sea are opposite.
Practical significance: the results of this work can be used to improve the methods of the medium-range and long-range forecasts of codfish catches in the North Atlantic region.
Supporting agencies: The work was carried out within the framework of budget financing of VNIRO Federal State Budgetary Institution
About the Authors
A. S. Krovnin
Russian Federal Research Institute of Fisheries and Oceanography («VNIRO»)
Russian Federation
Russian Federation
Andrey S. Krovnin
105187
19, Okruzhnoy proezd
Moscow
S. P. Melnikov
Russian Federal Research Institute of Fisheries and Oceanography («VNIRO»)
Russian Federation
Russian Federation
Sergey P. Melnikov
105187
19, Okruzhnoy proezd
Moscow
References
1. Beverton R., Holt S. 1969. Dynamics of exploited fish populations. Moscow: Pishchevaya Promyshlennost. 248 p. (in Russ.) (Beverton R.J.H., Holt S.J. 1957. On the dynamics of exploited fish populations. Her Majesty’s Stationery Office. London).
2. Bondarenko M.V., Krovnin A.S., Serebryakov V.P. 2003. Ranging year-class strength and survival rates during early life history of the Barents Sea cod fishes to establish biological reference points and evaluate environmental effects. Moscow: VNIRO Publish. 187 p. (in Russ.)
3. Borisov V.M. 1985. Natural mortality as a factor of abundance dynamics of commercial fish populations // Theory of formation of commercial fish stock abundance. Moscow: Nauka, 216 p. (in Russ.).
4. Dekhnik T.V., Serebryakov V.P., Soin S.G. 1982. Importance of early life stages in formation of year-class strength // Abstr. of the All-Union Conference on Theory of formation of year-class strength and rational exploitation of commercial fish stocks. Moscow. P. 34–38 (in Russ.)
5. Cushing D.H. 1979. Marine ecology and fisheries Moscow: Pishchevaya promyshlennost, 288 p. (in Russ.). (Cushing D.H. 1975. Marine ecology and fisheries. Cambridge etc. London).
6. Ricker W.E. 1979. Computation and interpretation of biological statistics offish population. M.: Pishchevaya Promyshlennost, 408 P. (in Russ.). (Ricker, W.E. 1975. Computation and interpretation of biological statistics of fish populations. Bulletin of Fisheries Research Board of Canada. V. 191).
7. Serebryakov V.P., Borisov V.M., Aldonov V.K. 1984. Population fecundity and strength of Arcto- Norwegian cod year-classes // Proceedings of the 1st Soviet–Norwegian Symposium, Moscow: VNIRO Press. P. 240–260. (in Russ.)
8. Basson M., Beddington J.R. 1993. Risks and uncertainties in the management of a single-cohort squid fishery: the Falkland Islands Illex fishery as an example // Risk Evaluation and Biological Reference Points for Fisheries Management / Smith J.S., Hunt J.J., Rivard D., (eds) Canadian Special publication of Fish. Aquatic Sci. P. 253–260.
9. DFO. 2019 a. Stock assessment of Northern Cod (NAFO Divs.2J3KL) in 2019. DFO CSAS Sci. Advis. Rep. 2019/050. 20 pp.
10. DFO. 2019 b. Stock Assessment of Atlantic Cod (Gadus morhua) in NAFO Divisions 4X5Y. DFO Can. Sci. Advis. Sec. Sci. Advis. Rep. 2019/015. 19 p.
11. Ellertsen B., Fossum P., Solemdal P., Sundby S., Tilseth S. 1987. The effect of biological and physical factors on the survival of Arcto-Norwegian cod and the influence on recruitment variability // Proceedings of the third Soviet-Norwegian Symposium. Inst. of Marine Research. Bergen. P. 101–126.
12. Garrod D.J. 1967. Population dynamics of the Arcto-Norwegian cod. // J. Fish. Res. Bull. V. 23 (1). P. 145–190.
13. Gulland J.A. 1965. Survival of the youngest stages of fish and its relation to year-class strength // ICNAF. Environmental Symposium, Special Publication. Rome. № 6. P. 363–371.
14. Hylen A., Nakken O., Nedreaas K. 2008. Northeast Arctic cod: fisheries, life history, fluctuations and management // Norwegian spring- spawning herring and Northeast Arctic cod — 100 years of research and management / O. Nakken (ed.) Tapir Academic Press. Trondheim. P. 83–118.
15. ICES. 2021 а. Cod (Gadus morhua) in subareas 1 and 2 (Northeast Arctic) // Report of the ICES Advisory Committee, 2021. ICES Advice 2021, cod.27.1–2. doi: 10.17895/ices.advice.7741.
16. ICES. 2021 b. Cod (Gadus morhua) in Subarea 4, Division 7.d, and Subdivision 20 (North Sea, eastern English Channel, Skagerrak) // Report of the ICES Advisory Committee, 2021. ICES Advice 2021, cod.27.47d20. doi: 10.17895/ices.advice.7746.
17. ICES. 2021 c. Cod (Gadus morhua) in subdivisions 24–32, eastern Baltic stock (eastern Baltic Sea) // Report of the ICES Advisory Committee, 2021. ICES Advice 2021, cod.27.24–32. doi: 10.17895/ices.advice.7745.
18. ICES. 2021 d. Cod (Gadus morhua) in subdivisions 22–24, western Baltic stock (western Baltic Sea) // Report of the ICES Advisory Committee, 2021. ICES Advice 2021, cod.27.22–24. doi: 10.17895/ices.advice.7744.
19. ICES. 2021 e. Northwestern Working Group (NWWG). 766 pp.
20. ICES. 2021 f. Haddock (Melanogrammus aeglefinus) in subareas 1 and 2 (Northeast Arctic) // Report of the ICES Advisory Committee, 2021. ICES Advice 2021, had.27.1–2. doi: 10.17895/ices.advice.8449.
21. ICES. 2021 g. Haddock (Melanogrammus aeglefinus) in Subarea 4, Division 6.a, and Subdivision 20 (North Sea, West of Scotland, Skagerrak) // Report of the ICES Advisory Committee, 2021. ICES Advice 2021, had.27.46a20. doi: 10.17895/ices.advice.7759.
22. ICES. 2021 h. Advice on fishing opportunities // Report of the ICES Advisory Committee, 2021. ICES Advice 2021, Section 1.1.1. doi: 10.17895/ices.advice.7720.
23. ICES. 2021 i. Haddock (Melanogrammus aeglefinus) in Divisions 7.b-k (southern Celtic Seas and English Channel) // Report of the ICES Advisory Committee, 2021. ICES Advice 2021, had.27.7b-k. doi: 10.17895/ices.advice.7764.
24. ICES. 2021 j. Haddock (Melanogrammus aeglefinus) in Division 5.b (Faroes grounds) // Report of the ICES Advisory Committee, 2021. ICES Advice 2021, had.27.5b. doi: 10.17895/ices.advice.7761.
25. ICES. 2021 k. Haddock (Melanogrammus aeglefinus) in Division 5.a (Iceland grounds) // In: Report of the ICES Advisory Committee, 2021. ICES Advice 2021, had.27.5a. doi: 10.17895/ices.advice.7760.
26. ICES. 2021 l. Saithe (Pollachius virens) in subareas 1 and 2 (Northeast Arctic) // Report of the ICES Advisory Committee, 2021. ICES Advice 2021, pok.27.1–2. doi: 10.17895/ices.advice.7826.
27. ICES. 2021 m. Saithe (Pollachius virens) in subareas 4 and 6, and in Division 3.a (North Sea, Rockall and West of Scotland, Skagerrak and Kattegat) // Report of the ICES Advisory Committee, 2021. ICES Advice 2021, pok.27.3a46. doi: 10.17895/ices.advice.7827.
28. ICES. 2021 n. Saithe (Pollachius virens) in Division 5.b (Faroes grounds) // Report of the ICES Advisory Committee, 2021.
29. ICES Advice 2021, pok.27.5b. doi: 10.17895/ices.advice.7829.
30. ICES. 202 1o. Saithe (Pollachius virens) in Division 5.a (Iceland grounds) // Report of the ICES Advisory Committee, 2021.
31. ICES Advice 2021, pok.27.5a. doi: 10.17895/ices.advice.7828.
32. O’Boyle R. 1993. Fisheries management organizations: a study of uncertainty // Risk Evaluation and Biological Reference Points for Fisheries Management / Smith J.S., Hunt J.J., Rivard D. (eds) Canadian Special publication of Fish. Aquatic Sci. P. 423–436.
33. Radovich J. 1962. Effects of sardine spawning stock size and environment on year-class production // California Fish and Game. V. 48. P. 123–140.
34. Rideout, R.M., Rogers, B., Ings, D.W. 2018. An Assessment of the Cod Stock in NAFO Divisions 3NO NAFO SCR Doc. No. 18/028. 52 p.
35. Schaefer, M.B. 1954. Some aspects of the dynamics of populations, important for the management of the commercial marine fisheries. Inter-American Tropical Tuna Commission. Bull. V. 1. P. 7–56.
Review
For citations:
Krovnin A.S., Melnikov S.P. Dynamics of codfish stocks in the North Atlantic region. Trudy VNIRO. 2023;192:55-67. (In Russ.) https://doi.org/10.36038/2307-3497-2023-192-55-67
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