Underwater video of lake whitefish Coregonus clupeaformis spawning in lake Michigan ...
The lake whitefish Coregonus clupeaformis, dikameg in Anishinaabemowin, holds cultural importance, and is a mainstay of commercial, recreational, and subsistence fisheries throughout North America. In the Laurentian Great Lakes, declines in recruitment, since the early 2000s, have raised concerns am...
| Main Authors: | , , , , , |
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| Format: | Dataset |
| Language: | English |
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Dryad
2024
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.5061/dryad.tx95x6b67 https://datadryad.org/stash/dataset/doi:10.5061/dryad.tx95x6b67 |
| Summary: | The lake whitefish Coregonus clupeaformis, dikameg in Anishinaabemowin, holds cultural importance, and is a mainstay of commercial, recreational, and subsistence fisheries throughout North America. In the Laurentian Great Lakes, declines in recruitment, since the early 2000s, have raised concerns among stewards and fishery managers. A more detailed understanding of the lake whitefish mating system could help resolve potential recruitment bottlenecks and thus inform appropriate stewardship actions. Herein, we describe, for the first time, a single lake whitefish spawning event captured using high-resolution underwater videography. From 94 h spent on the water, we captured and analyze a 4.5 min video clip that shows pre-mating, mating, and post-mating behaviour of a male and female lake whitefish from Lake Michigan. The clip shows a number of what we interpret as courtship, site-selection, and spawning behaviours culminating in release of about 20 eggs in a single spawning event. Behaviours that included ... : During 2022-2023, we used a Boxfish Robotics (https://www.boxfishrobotics.com) “Luna” craft to capture high-resolution underwater footage of spawning lake whitefish in lakes Huron and Michigan. The Luna craft is a next-generation drone that utilizes advanced full-frame imaging from a 4K 10-bit 4:2:2 120p Sony A7SIII camera equipped with either a Sony 16-35 mm f/2.8 or a Sony 24mm f/1.4 Zeiss lens. In shallow water, a 250-mm Nauticam glass dome port was used for the best edge-to-edge image quality, but for deepwater filming, a 200-mm Boxfish acrylic dome rated for 500 m depth was used. High sensitivity up to ISO 409,600 provided exceptional low-light camera performance. Two dimmable 8,500-lumen lights attached via adjustable arm mounts to the front of the craft provided ample illumination under all light conditions encountered. The ROV was tethered to the surface by a 300-m long, 2.7-mm diameter, lightweight, fiber-optic cable which allows recording on the surface in 4k ProRes Raw at 30p and frame stabilizing ... |
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