Isotopic records on the massive death of sea scallops in Vancouver Island of Canada

Larval growth and settlement rates are important larval behaviors for larval protections. The variability of larval growthsettlement rates and physical conditions for 2006-2012 and in the future with potential climate changes was studied using the coupling ROMS-IMBs, and new temperature and current indexes. Forty-four experimental cases were conducted for larval growth patterns and release mechanisms, showing the spatial, seasonal, annual, and climatic variations of larval growthsettlement rates and physical conditions, demonstrating that the slight different larval temperature-adaption and larval release strategies made difference in larval growth-settlement rates, and displaying that larval growth and settlement rates highly depended upon physical conditions and were vulnerable to climate changes.

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Relationships between temperature and Pacific hake distribution vary across latitude and life-history stage

Marine Ecology Progress Series ◽

10.3354/meps13286 ◽

2020 ◽

Vol 639 ◽

pp. 185-197 ◽

Cited By ~ 2

Author(s):

MJ Malick ◽

ME Hunsicker ◽

MA Haltuch ◽

SL Parker-Stetter ◽

AM Berger ◽

...

Keyword(s):

Life History ◽

Environmental Effects ◽

Environmental Conditions ◽

Vancouver Island ◽

Additive Models ◽

Life History Stage ◽

Fish Stocks ◽

Merluccius Productus ◽

Multiple Dimensions ◽

Effects Of Temperature

Environmental conditions can have spatially complex effects on the dynamics of marine fish stocks that change across life-history stages. Yet the potential for non-stationary environmental effects across multiple dimensions, e.g. space and ontogeny, are rarely considered. In this study, we examined the evidence for spatial and ontogenetic non-stationary temperature effects on Pacific hake Merluccius productus biomass along the west coast of North America. Specifically, we used Bayesian additive models to estimate the effects of temperature on Pacific hake biomass distribution and whether the effects change across space or life-history stage. We found latitudinal differences in the effects of temperature on mature Pacific hake distribution (i.e. age 3 and older); warmer than average subsurface temperatures were associated with higher biomass north of Vancouver Island, but lower biomass offshore of Washington and southern Vancouver Island. In contrast, immature Pacific hake distribution (i.e. age 2) was better explained by a nonlinear temperature effect; cooler than average temperatures were associated with higher biomass coastwide. Together, our results suggest that Pacific hake distribution is driven by interactions between age composition and environmental conditions and highlight the importance of accounting for varying environmental effects across multiple dimensions.

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