Kevin D. E. Stokesbury, Kyle Cassidy, Travis M. Lowery
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Constructing a baseline groundfish trawl survey for an offshore windfarm development area
Objective
Large-scale offshore windfarms are proposed along the U.S. Northeast coast; the first is the Vineyard Wind lease area, which is planned for construction in 2023. During the fall of 2018, an experimental bottom trawl survey in the Vineyard Wind lease area and adjacent control area was conducted to collect preliminary estimates of fish assemblage composition, density, and size distribution.
Methods
Initially, a new open cod end design was tested, but poor visibility due to fine substrate rendered the gear inefficient. The survey was completed using the traditional closed-tow method.
Result
The estimates of density and variance enabled a power analysis, which recommended a minimum of 20 tows in the development area and 20 tows in the control area to achieve a 25% chance of detecting a shift in the density of the four most abundant species.
Conclusion
These results led to the development of a seasonal bottom trawl survey beginning in 2019 using protocols that align with other shelfwide bottom trawl surveys.
期刊介绍：
Marine and Coastal Fisheries: Dynamics, Management, and Ecosystem Science publishes original and innovative research that synthesizes information on biological organization across spatial and temporal scales to promote ecologically sound fisheries science and management. This open-access, online journal published by the American Fisheries Society provides an international venue for studies of marine, coastal, and estuarine fisheries, with emphasis on species'' performance and responses to perturbations in their environment, and promotes the development of ecosystem-based fisheries science and management.
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