| Vol 51, No 1 (2025) | 
		ОРИГИНАЛЬНЫЕ СТАТЬИ | 
		Interannual and seasonal variations in the frequency of occurrence of harbor porpoises, Phocoena phocoena (Linnaeus, 1758) (Cetacea: Phocoenidae), off the northeastern Sakhalin Coast, Sea of Okhotsk, in 2008–2021 | 
		
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