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Behavior of Arctic fourhorn sculpin (Myoxocephalus quadricornis) beneath winter sea ice assessed with passive acoustic telemetry in Tremblay Sound (Baffin Island, Canada)

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Abstract

The Arctic experiences dramatic annual cycles in environmental condition, including winters that can last two thirds of the year. During these long winters, coastal waters are covered in ice and show very low levels of productivity which presumably can be stressful for organisms which remain in the same ecosystem year-round. However, the activities or behavior of marine Arctic residents during this period is not well understood. Fourhorn sculpin (Myoxocephalus quadricornis) are residents of Tremblay Sound, Nunavut, Canada which freezes over entirely from October to June each year. We characterized the behavior of a small number of individuals (n = 7) beneath sea ice with passive acoustic telemetry to monitor position as well as in situ acceleration and depth over time. Intermittent bursts of acceleration and changes in depth usage indicate that sculpins are not dormant under the winter ice and likely continue their characteristic lie-in-wait foraging. A generalized linear mixed model indicated activity increased marginally while individuals moved to shallower waters as spring approached. These behaviors suggest that sculpin could be exploiting early ice-associated productivity before ice melt begins. The continued activity of sculpin even under sea ice provides potential insight to how residents persist in Arctic winters.

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Data Availability

The datasets generated during and/or analyzed during the current study are available in the GitHub repository, https://github.com/nhermann1/sculpinAP_PolBiol_23.

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Acknowledgements

The authors acknowledge with gratitude the Mittimatalik Hunters and Trappers Organization and all members of the community of Mittimatalik for granting access to and assistance in the field where research was conducted. We acknowledge the Department of Fisheries and Oceans Canada for funding and organization in the project. NTH was provided funding by the University of New Hampshire.

Funding

University of New Hampshire, University of Windsor, Fisheries and Oceans Canada

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Contributions

NEH, MM, and KJH were responsible for the conception and design of the field program. Early field work was conducted by NEH and LJH, and later included NTH. NBF and NEH guided analyses initiated by LJH but primarily done by NTH. Writing was done by NTH with review completed by all other authors.

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Correspondence to Nathan T. Hermann.

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All authors certify that they have no competing interests to declare that are relevant to the content of this manuscript.

Ethical approval

All handling of fishes was conducted in compliance with approved guidelines from both the Universities of Windsor (AUPP:#17–12) and New Hampshire (IACUC:#180602). Sampling methods and numbers were also approved by the local Mittimatalik Hunters and Trappers Organization.

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Hermann, N.T., Hammer, L.J., Hussey, N.E. et al. Behavior of Arctic fourhorn sculpin (Myoxocephalus quadricornis) beneath winter sea ice assessed with passive acoustic telemetry in Tremblay Sound (Baffin Island, Canada). Polar Biol 46, 1151–1158 (2023). https://doi.org/10.1007/s00300-023-03182-0

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  • DOI: https://doi.org/10.1007/s00300-023-03182-0

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