Abstract
Population dynamics of early and late temporal forms of pink salmon Oncorhynchus gorbuscha on the Iturup and Kunashir islands (southern Kuril Islands) and on the southeastern coast of Sakhalin in 1991–2017 is considered. The periods of the increase and decrease in the abundance of pink salmon in odd and even years occurred simultaneously. However, the duration of periods with high abundance of the early form was shorter. The sharp decrease in the abundance of each of the temporal forms was often due to the effect of extreme environmental factors (flash floods in rivers that wash out the soil on spawning grounds or storms in the coastal zone during the feeding period of juveniles that had recently migrated downstream from the rivers); however, the causes remained unclear in some cases. The abundance of the early form tends to decrease more intensively or one to two generations earlier than the reduction of the more numerous late form; therefore, the emergence of depression signs in the early form may indicate the coming general depression of pink salmon stocks in the area under study.
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REFERENCES
Beamish, R.J., Noakes, D.J., McFarlane, G.A., et al., The regime concept and natural trends in the production of Pacific salmon, Can. J. Fish Aquat. Sci., 1999, vol. 56, pp. 516–526.
Gritsenko, O.F, Population structure of the Sakhalin pink salmon Oncorhynchus gorbuscha (Walbaum), Vopr. Ikhtiol., 1981, vol. 21, no. 5, pp. 787–799.
Irvine, J.R. and Riddell, B.E., Salmon as status indicators for North Pacific ecosystems, Bull. North Pac. Anadromous Fish Com., 2007, no. 4, pp. 285–287.
Ivankov, V.N., Seasonal races of pink salmon, Izv. Tikhookean. Nauchno-Issled. Inst. Rybn. Khoz. Okeanogr., 1967, vol. 61, pp. 143–151.
Ivankov, V.N., Ecological types of fishes: role of ecological types in species evolution, in Biologiya prokhodnykh ryb Dal’nego Vostoka (Biology of Migratory Fishes of the Far East), Vladivostok: Dal’nevost. Gos. Univ., 1984, pp. 5–9.
Ivankov, V.N., Ecological types of salmons, in Morfologiya i sistematika lososevykh (Morphology and Systematics of Salmon Fishes), Leningrad: Zool. Inst., Akad. Nauk SSSR, 1985, pp. 85–91.
Ivankov, V.N., Specific population structure of pink salmon and its rational use, Biol. Morya (Vladivostok), 1986, no. 2, pp. 44–51.
Ivankov, V.N., Intraspecific differentiation and population organization of pink salmon Oncorhynchus gorbuscha in different parts of area, Izv. Tikhookean. Nauchno-Issled. Inst. Rybn. Khoz. Okeanogr., 2011, vol. 167, pp. 64–76.
Ivankov, V.N. and Ivankova, E.V., Intraspecific reproductive strategy of Pacific salmons of genus Oncorhynchus: fundamental resemblance and species deviations, Izv. Tikhookean. Nauchno-Issled. Inst. Rybn. Khoz. Okeanogr., 2013, vol. 173, pp. 103–118.
Ivankov, V.N. and Ivankova, E.V., Ecological subspecies and locally temporal populations of anadromous fish, J. Ichthyol., 2017, vol. 57, no. 1, pp. 99–105.
Kaev, A.M., The risk group of juveniles of chum salmon Oncorhynchus keta during fatting in estuary, Vopr. Ikhtiol., 1992, vol. 32, no. 2, pp. 53–60.
Kaev, A.M., Temporal structure and some features of stock dynamics of pink salmon Oncorhynchus gorbuscha (Salmonidae), J. Ichthyol., 2012, vol. 52, no. 1, pp. 57–67.
Kaev, A.M., Influence of extreme environmental factors on the dynamics of abundance of the pink salmon Oncorhynchus gorbuscha, J. Ichthyol., 2018, vol. 58, no. 2, pp. 204–216.
Kaev, A.M. and Irvine, J.R., Population dynamics of pink salmon in the Sakhalin-Kuril region, Russia, Bull. North Pac. Anadromous Fish Com., 2016, no. 6, pp. 297–305.
Kaev, A.M. and Romasenko, L.V., Downstream migration and formation of diversity by the body length of the pink and chum salmon juveniles, Izv. Tikhookean. Nauchno-Issled. Inst. Rybn. Khoz. Okeanogr., 2002, vol. 130, pp. 819–828.
Kaev, A.M. and Romasenko, L.V., Morphobiological specific features of the river and lake forms of chum salmon Oncorhynchus keta (Salmonidae) on the southern Kuril Islands, J. Ichthyol., 2010, vol. 50, no. 4, pp. 285–294.
Kaev, A.M. and Romasenko, L.V., Specific spawning and downstream migrations of pink salmon (Oncorhynchus gorbuscha) to the Kunashir Island related to its temporal structure, Izv. Tikhookean. Nauchno-Issled. Inst. Rybn. Khoz. Okeanogr., 2013, vol. 173, pp. 67–76.
Kaev, A.M. and Romasenko, L.V., Gorbusha i keta ostrova Kunahsir (structura populyatsii, vosproizvodstvo, promysel) (Pink and Chum Salmons from Kunashir Island: Population Structure, Reproduction, and Fishery), Yuzhno-Sakhalinsk: Sakh. Gos. Univ., 2017.
Kaev, A.M. and Zhivotovskii, L.A., New data for discussion about local and fluctuating herds of the pink salmon Oncorhynchus gorbuscha, Izv. Tikhookean. Nauchno-Issled. Inst. Rybn. Khoz. Okeanogr., 2016, vol. 187, pp. 122–144.
Kaev, A.M., Afanas’ev, A.I., Rubtsova, G.A., et al., Phenetic differentiation of chum salmon of river and lake ecotypes of the Iturup Island (Kuril Island), Materialy mezhdunarodnoi konferentsii “Sovremennoe sostoyanie vodnykh bioresursov” (Proc. Int. Conf. “Modern Status of Water Biological Resources”), Vladivostok: TINRO Tsentr, 2008, pp. 372–374.
Kaev, A.M., Avdeev, D.V., Dzen, G.N., et al., Quantitative calculation of downstream migrating pink salmon juveniles in the rivers of Sakhalin oblast in 2017, in Byulleten’ no. 12 izucheniya tikhookeanskikh lososei na Dal’nem Vostoke (Bulletin No. 12 of the Study of Pacific Salmons in the Far East), Vladivostok: TINRO-Tsentr, 2017, pp. 74–81.
NPAFC, North Pacific Anadromous Fish Commission, 2018. http://www.npafc.org/new/pub_documents.html.
Romasenko, L.V., Dynamics of pink salmon (Oncorhynchus gorbuscha) herd near Kunashir Island, Izv. Tikhookean. Nauchno-Issled. Inst. Rybn. Khoz. Okeanogr., 2012, vol. 168, pp. 42–58.
Weather forecast, 2018. http://rp5.ru.
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This study was carried out within the framework of the state assignment of the Ministry of Education and Science of Russia, no. 6.9561.2017/8.9.
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Translated by D. Zabolotny
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Kaev, A.M. Some Population Dynamics Issues of Pink Salmon Oncorhynchus gorbuscha Temporal Forms on Sakhalin and the Southern Kuril Islands. J. Ichthyol. 59, 583–590 (2019). https://doi.org/10.1134/S003294521903007X
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DOI: https://doi.org/10.1134/S003294521903007X