The influence of the El Niño Southern Oscillation on paralarval market squid (<i>Doryteuthis opalescens</i>)

Perretti, Charles T.; Sedarat, Mohammad

doi:10.1111/fog.12167

Cited by 11 publications

(11 citation statements)

References 16 publications

(19 reference statements)

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“…Our results are consistent with previous studies that indicate that juvenile indices are likely to be more appropriate for informing near term fisheries potential in cephalopod populations than paralarval surveys, as paralarval abundance indices tend to relate more strongly to spawning stock biomass (reviewed in Rodhouse et al, 2014, andconsistent with Koslow andAllen, 2011;Perretti and Sedarat, 2016;van Noord and Dorval, 2017). Stige et al (2013) drew similar conclusions for finfish with respect to larval and juvenile abundance indices.…”

Section: Discussionsupporting

confidence: 91%

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

et al. 2018

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A B S T R A C TThe fishery for market squid (Doryteuthis opalescens) in California is typical of many of the world's cephalopod fisheries, in that a very short life span and the effect of environmental forcing on recruitment result in enormous interannual variability in catches and population size. We evaluate the utility of a pre-recruit index of squid abundance that is based on midwater trawl sampling in the 3-5 months preceding the onset of the fishery as a basis for predicting landings. Catches in the survey largely represent squid in the 30-50 mm dorsal mantle length size range, representing individuals 30-90 day old. Catch-per-unit-effort statistics are derived from simple twofactor Δ-Generalized Linear Models, with year and station as main effects and numbers per tow as the dependent variable. Regional models for northern and southern squid populations are developed. Pre-recruit indices, as well as indices of squid prey (krill) abundance are compared with landings data, as well as estimates of squid spawning stock biomass derived from an egg escapement model. Our results show that the abundance of prerecruit market squid and krill sampled in the survey tracks both catches and overall population size, providing the potential to forecast landings. Our findings are consistent with a sparse but growing literature showing the potential utility of pre-recruit surveys to inform fisheries participants and managers.

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Section: Discussionsupporting

confidence: 91%

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

et al. 2018

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“…Recently, D . opalescens paralarvae collected off of California were found to be smaller during La Niña years compared to paralarvae at the same age during El Niño years [51–52]. Squid exposed to low pHOx in nature may be impacted similarly as they are in the laboratory [51].…”

Section: Discussionmentioning

confidence: 99%

Development of Embryonic Market Squid, Doryteuthis opalescens, under Chronic Exposure to Low Environmental pH and [O2]

et al. 2016

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The market squid, Doryteuthis opalescens, is an important forage species for the inshore ecosystems of the California Current System. Due to increased upwelling and expansion of the oxygen minimum zone in the California Current Ecosystem, the inshore environment is expected to experience lower pH and [O2] conditions in the future, potentially impacting the development of seafloor-attached encapsulated embryos. To understand the consequences of this co-occurring environmental pH and [O2] stress for D. opalescens encapsulated embryos, we performed two laboratory experiments. In Experiment 1, embryo capsules were chronically exposed to a treatment of higher (normal) pH (7.93) and [O2] (242 μM) or a treatment of low pH (7.57) and [O2] (80 μM), characteristic of upwelling events and/or La Niña conditions. The low pH and low [O2] treatment extended embryo development duration by 5–7 days; embryos remained at less developed stages more often and had 54.7% smaller statolith area at a given embryo size. Importantly, the embryos that did develop to mature embryonic stages grew to sizes that were similar (non-distinct) to those exposed to the high pH and high [O2] treatment. In Experiment 2, we exposed encapsulated embryos to a single stressor, low pH (7.56) or low [O2] (85 μM), to understand the importance of environmental pH and [O2] rising and falling together for squid embryogenesis. Embryos in the low pH only treatment had smaller yolk reserves and bigger statoliths compared to those in low [O2] only treatment. These results suggest that D. opalescens developmental duration and statolith size are impacted by exposure to environmental [O2] and pH (pCO2) and provide insight into embryo resilience to these effects.

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“…Temporal variability is inherent in natural resource-based sectors, including commercial fisheries (Stoll et al 2017 ), and is driven by human-induced global environmental change (Halpern et al 2015 ), naturally occurring climate phenomena (e.g., El Niño Southern Oscillation [ENSO] and Pacific Decadal Oscillation [PDO]) (Hollowed et al 2001 ; Perretti and Sedarat 2016 ), and socioeconomic pressures (e.g., migration to coastal communities and/or changes in market dynamics/demand) (Bennett et al 2016 ; Reddy et al 2013 ). In social-ecological systems, escalating environmental changes interact across scales with social and economic changes, which can lead to feedback loops, abrupt change, and heightened exposure to new types of risk (Reyers et al 2018 ).…”

Section: Introductionmentioning

confidence: 99%

Climate adaptation in the market squid fishery: fishermen responses to past variability associated with El Niño Southern Oscillation cycles inform our understanding of adaptive capacity in the face of future climate change

2022

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Evaluating the strategies fishermen have used to respond to short-term climate variability in the past can help inform our understanding of the adaptive capacity of a fishery in the face of anticipated future change. Using historic fishery landings, climate records, and fishermen surveys, we document how market squid fishermen respond to high seasonal and interannual climate variability associated with the El Niño Southern Oscillation (ENSO) and responses to hypothetical future scenarios of low abundance and range shift. Overall, fishermen have been able to adapt to dramatic shifts in the geographic range of the fishery given their high mobility, with fishermen with larger vessels expressing a willingness to travel greater distances than those with smaller vessels. Nearly half of fishermen stated that they would switch fisheries if market squid decreased dramatically in abundance, although fishermen who were older, had been in the fishery longer, were highly dependent on squid for income, and held only squid and/or coastal pelagic finfish permits were less likely to switch to another fishery in a scenario of lower abundance. While market squid fishermen have exhibited highly adaptive behavior in the face of past climate variability, recent (and likely future) range shifts across state boundaries, as well as closures of other fisheries, constrain fishermen’s choices and emphasize the need for flexibility in management systems. Our study highlights the importance of considering connectivity between fisheries and monitoring and anticipating trans-jurisdictional range shifts to facilitate adaptive fishery management. Supplementary Information The online version contains supplementary material available at 10.1007/s10584-022-03394-z.

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The influence of the El Niño Southern Oscillation on paralarval market squid (Doryteuthis opalescens)

Cited by 11 publications

References 16 publications

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

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

Development of Embryonic Market Squid, Doryteuthis opalescens, under Chronic Exposure to Low Environmental pH and [O2]

Climate adaptation in the market squid fishery: fishermen responses to past variability associated with El Niño Southern Oscillation cycles inform our understanding of adaptive capacity in the face of future climate change

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