Predicting market squid (Doryteuthis opalescens) landings from pre-recruit abundance

Ralston, Stephen; Dorval, Emmanis; Ryley, Laura; Sakuma, Keith M.; Field, John C.

doi:10.1016/j.fishres.2017.11.009

Cited by 15 publications

(10 citation statements)

References 21 publications

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“…In addition to providing recruitment indicators for a suite of commercially important taxa such as groundfish and market squid 36 , 37 , our ecosystem survey has played a pivotal role for informing salmon management, understanding unusual marine mammal mortality events, and unraveling impacts from heatwaves to understand and mitigate whale entanglements in fishing gear 27 , 38 . Thus, losing ecosystem monitoring data may be directly related to loss of insight for informing dynamic ocean management, leading to increased uncertainty 7 .…”

Section: Resultsmentioning

confidence: 99%

Diverse integrated ecosystem approach overcomes pandemic-related fisheries monitoring challenges

et al. 2021

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The COVID-19 pandemic caused unprecedented cancellations of fisheries and ecosystem-assessment surveys, resulting in a recession of observations needed for management and conservation globally. This unavoidable reduction of survey data poses challenges for informing biodiversity and ecosystem functioning, developing future stock assessments of harvested species, and providing strategic advice for ecosystem-based management. We present a diversified framework involving integration of monitoring data with empirical models and simulations to inform ecosystem status within the California Current Large Marine Ecosystem. We augment trawl observations collected from a limited fisheries survey with survey effort reduction simulations, use of seabird diets as indicators of fish abundance, and krill species distribution modeling trained on past observations. This diversified approach allows for evaluation of ecosystem status during data-poor situations, especially during the COVID-19 era. The challenges to ecosystem monitoring imposed by the pandemic may be overcome by preparing for unexpected effort reduction, linking disparate ecosystem indicators, and applying new species modeling techniques.

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Section: Resultsmentioning

confidence: 99%

Diverse integrated ecosystem approach overcomes pandemic-related fisheries monitoring challenges

et al. 2021

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“…Spatially, the value and magnitude of these fisheries have distinctive footprints with regional intensity and habitat effects. A variety of RREAS targeted studies have benefited stock assess-ment, management, and ultimately ecosystem services of these fisheries (Field et al, 2010b;Wells et al, 2017;Ralston et al 2018;. With the history of these ecosystem services now spatially quantified (Miller et al, 2017), there is greater potential to derive diversity metrics for fishing activity and its value in order to determine those areas of the ocean that support a variety of fishing opportunities.…”

Section: The Wealth Of Pelagic Biodiversitymentioning

confidence: 99%

Pelagic Biodiversity, Ecosystem Function, and Services: An Integrated Observing and Modeling Approach

Santora¹,

Schroeder²,

Bograd³

et al. 2021

Oceanog

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Our synthesis combines inferences from a long-term fisheries monitoring survey and principles of ecosystem oceanography to inform and benefit biodiversity monitoring and modeling studies within the California Current Large Marine Ecosystem. We review the history, research, and application of the Rockfish Recruitment and Ecosystem Assessment Survey, highlighting how one survey of life can illuminate understanding of pelagic biodiversity patterns and ecosystem function (from micronekton to top predators to ecosystem services) that may be easily extended to other surveys to strengthen observation networks. Biodiversity is often used as the standard for understanding ecosystem resilience to climate or anthropogenic disturbances. This concept is central to our review, and we examine it in relation to complex impacts resulting from a recent climate event (a marine heatwave) on biodiversity, ecosystem function, and socioeconomic services. We present a system of interconnected modules that summarize and illustrate patterns of pelagic biodiversity using a phylogenetic approach, known modulations and environmental drivers of variability (i.e., source waters, habitat compression, and ecosystem shifts), remote sensing and modeling tools for monitoring biodiversity (i.e., seascapes and krill hotspot models), and the status of top predator biodiversity. We use these modules to summarize connections between biodiversity and ecosystem services provided. Following each module, a brief discussion of questions raised and recommendations for future studies and partnerships is provided to improve future integrative biodiversity monitoring. Additionally, we invested in promoting data accessibility and outreach, resulting in several data visualization and ecosystem context tools for biodiversity monitoring and fisheries management. We advocate that a diverse integrated ecosystem approach should result in fewer ecological surprises by putting past events and surprises into context, and thus better anticipating those yet to arrive. Building partnerships among researchers and coastal communities will result in increased capacity of analytical tools and perspectives to ensure sustainable use of fishery resources, while strengthening the resilience of fishing communities.

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“…Similarly, other surveys and models of squid density for the entire California coast have shown a marked increase in squid catches and density since 2004, and the catch for the northern portion of the state has risen steadily (Ralston et al. 2018).…”

Section: Discussionmentioning

confidence: 78%

“…2004; Ralston et al. 2018). Future avenues of research should include examining the mechanistic drivers of distribution shifts exhibited by market squid and other forage species and should consider how future ocean conditions will shape the availability of squid as both prey to predators and harvest for coastwide fishing fleets.…”

Section: Discussionmentioning

confidence: 99%

Evidence of Temperature‐Driven Shifts in Market SquidDoryteuthis opalescensDensities and Distribution in the California Current Ecosystem

et al. 2022

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Climate change is impacting the abundance and distribution of marine resources. The consequences of these impacts are likely to alter trophic interactions between species within an ecosystem and affect fisheries opportunities for coastal communities. Market squid Doryteuthis opalescens comprise the largest fishery (by volume) in California, USA, and questions persist about whether the changing ocean conditions are leading to an increase in squid abundance in traditional fishing locations as well as marginal habitats in northern areas. To examine this potential phenomenon, we used fisheries‐independent survey data collected by the National Marine Fisheries Service between 1998 and 2019 to develop a spatiotemporal model that estimates changes in the squid density from central California to northern Washington. We found a fivefold increase in the squid index of abundance across the entire spatial domain of the surveys during the sampling period, with the largest increases occurring in the Oregon and Washington strata. Although our model demonstrated that encounter rates and squid densities for the surveys increased in warmer and more saline waters, large shifts in squid distribution were only associated with deviations in ocean temperatures that could be characterized as marine heatwaves. This analysis adds to a growing body of work documenting the spatiotemporal response of marine resources to both long‐term trends in warming ocean conditions and episodic events, such as marine heatwaves. Furthermore, it demonstrates the need for ecosystem assessment models with the ability to forecast changes in species distribution and abundance at spatiotemporal scales that are relevant for coastal fishing communities.

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Predicting market squid (Doryteuthis opalescens) landings from pre-recruit abundance

Cited by 15 publications

References 21 publications

Diverse integrated ecosystem approach overcomes pandemic-related fisheries monitoring challenges

Diverse integrated ecosystem approach overcomes pandemic-related fisheries monitoring challenges

Pelagic Biodiversity, Ecosystem Function, and Services: An Integrated Observing and Modeling Approach

Evidence of Temperature‐Driven Shifts in Market SquidDoryteuthis opalescensDensities and Distribution in the California Current Ecosystem

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