Spatiotemporal variation in maturation: A case study with American plaice (Hippoglossoides platessoides) on the Grand Bank off Newfoundland

• Main Authors: Zheng, Nan, Robertson, Matthew David, Cadigan, Noel G., Zhang, Fan, Morgan, M. Joanne, Wheeland, Laura J.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: NRC Research Press (a division of Canadian Science Publishing) 2020
• Subjects: Newfoundland
• Online Access: http://hdl.handle.net/1807/102114; http://www.nrcresearchpress.com/doi/abs/10.1139/cjfas-2020-0017

Fisheries management usually does not explicitly account for spatial variation in life history traits within populations. However, for some stocks this spatial variation may be substantial. We develop a Spatiotemporal Generalized Linear Model and fit the model to a long time-series of maturation data for American plaice (Hippoglossoides platessoides) on the Grand Bank off Newfoundland and Labrador. The spatiotemporal correlation structure improves estimation of small-scale spatiotemporal variation in maturity across locations and times with limited or few samples. We test how American plaice maturity varies at three different spatial resolutions. We find improvements in model fit when decreasing spatial scales for higher spatial resolution due to high levels of spatial heterogeneity in American plaice maturity at age and size. Modeling variation in life history traits at the appropriate spatial and temporal scales is necessary for understanding population dynamics and developing appropriate fisheries management strategies. The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author.