Bakanev S. Forecasting the potential range of mackerel icefish (Champsoseptalus gunnari) in the Western Arctic // Principy èkologii. 2026. № 2. P. 4‒25. DOI: 10.15393/j1.art.2026.17143


Issue № 2

Original research

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Forecasting the potential range of mackerel icefish (Champsoseptalus gunnari) in the Western Arctic

Bakanev
   Sergey Victorovich
DSc, Polar Research Institute of Marine Fisheries and Oceanography (PINRO), 6, Knipovich St., Murmansk, 183763, Russia, mombus@gmail.com
Keywords:
Champsocephalus gunnari
mackerel icefish
species distribution modelling
ensemble modelling
biomod2
bipolar transfer
ecological niche
introduction
Western Arctic
Summary: The study theoretically assesses the environmental suitability of the Arctic seas of Russia for potential introduction of the Antarctic icefish (Champsocephalus gunnari), a potential cold-water aquaculture species with a unique physiology (lack of hemoglobin). Despite the external similarities of the polar conditions, a quantitative analysis of the transfer of an ecological niche between hemispheres has not been carried out previously. Ensemble models of the distribution of the species (10 algorithms, the biomod2 package) were constructed with a projection on the water area of the Western Arctic (65-90°N, 0-120° E) for the modern period, 2050 and 2090, according to the SSP5 8.5 scenario. At that, we based on data on the presence of the species near the island of South Georgia (1840 cells, 1986-2023) and abiotic predictors (depth, oxygen, distance to shore, bottom temperature, salinity. Results show that 98.9% of the Arctic area falls within the extrapolation zone of the model (MESS < 0), niche overlap indices are minimal (D = 0.097; I = 0.257). In modern conditions, the increased suitability of the environment (HSI 0.6–0.8) is confined to the coastal shelves of Arctic archipelagos. By 2090, zones with non‑zero HSI remain only around the Severnaya Zemlya with a marked decreased in values. The obtained forecasts are hypothetical due to the narrow range of training data (South Georgia only) and require expanding the sample to include all populations of the species, integrating physiological models, and accounting for biotic interactions.

© Petrozavodsk State University

Received on: 25 March 2026
Published on: 26 June 2026

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