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Fit to predict? Ecoinformatics for predicting the catchability of a pelagic fish in near real-time
Journal article   Open access   Peer reviewed

Fit to predict? Ecoinformatics for predicting the catchability of a pelagic fish in near real-time

Kylie L Scales, Elliott L Hazen, Sara M Maxwell, Heidi Dewar, Suzanne Kohin, Michael G Jacox, Christopher A Edwards, Dana K Briscoe, Larry B Crowder, Rebecca L Lewison, …
Ecological Applications, Vol.27(8), pp.2313-2329
2017
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PDF - Author's Accepted Version1.44 MBDownloadView
Accepted VersionPDF - Author Accepted Version Open Access
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https://doi.org/10.1002/eap.1610View
Published Version

Expert Quote   15-Feb-2025

UniSC News (Clare McKay)

Abstract

dynamic ocean management fisheries remote sensing satellite ROMS ocean model species distribution model ecological forecasting
The ocean is a dynamic environment inhabited by a diverse array of highly migratory species, many of which are under direct exploitation in targeted fisheries. The timescales of variability in the marine realm coupled with the extreme mobility of ocean-wandering species such as tuna and billfish complicates fisheries management. Developing ecoinformatics solutions that allow for near real-time prediction of the distributions of highly mobile marine species is an important step towards the maturation of dynamic ocean management and ecological forecasting. Using 25 years (1990-2014) of NOAA fisheries' observer data from the California drift gillnet fishery, we model relative probability of occurrence (presence-absence) and catchability (total catch) of broadbill swordfish Xiphias gladius in the California Current System (CCS). Using freely-available environmental datasets and open source software, we explore the physical drivers of regional swordfish distribution. Comparing models built upon remotely-sensed datasets with those built upon a data-assimilative configuration of the Regional Ocean Modelling System (ROMS), we explore trade-offs in model construction and address how physical data can affect predictive performance and operational capacity. Swordfish catchability was found to be highest in deeper waters (>1500m) with surface temperatures in the 14-20°C range, isothermal layer depth (ILD) of 20-40m, positive sea surface height anomalies and during the new moon ( <20% lunar illumination). We observed a greater influence of mesoscale variability (sea surface height, wind speed, isothermal layer depth, Eddy Kinetic Energy) in driving swordfish catchability (total catch) than was evident in predicting the relative probability of presence (presence-absence), confirming the utility of generating spatio-temporally dynamic predictions. Data-assimilative ROMS circumvent the limitations of satellite remote sensing in providing physical data fields for species distribution models (e.g. cloud cover, variable resolution, sub-surface data), and facilitate broad-scale prediction of dynamic species distributions in near real-time.

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