Running the gauntlet: Connectivity between natal and nursery areas for Pacific ocean perch (Sebastes alutus) in the Gulf of Alaska, as inferred from a biophysical individual-based model

Stockhausen, William T.; Coyle, Kenneth O.; Hermann, Albert J.; Doyle, Miriam J.; Gibson, Georgina A.; Hinckley, Sarah; Ladd, Carol; Parada, Carolina

doi:10.1016/j.dsr2.2018.05.016

Cited by 14 publications

(11 citation statements)

References 62 publications

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“…The IBM was developed using the Dispersal Model for Early Life Stages (DisMELS) IBM framework (Stockhausen, et al., 2019) to track transport and dispersal of the pelagic egg and larval stages of marine organisms through earlier life stages from spawning to settlement. Briefly, DisMELS incorporates a Lagrangian particle tracking algorithm and species‐specific traits, allowing the model to be parameterized for multiple species (Cooper et al., 2013; Duffy‐Anderson et al., 2013; Sohn, 2016; Stockhausen, et al., 2019). The hydrographic ROMS model is a primitive equation, three‐dimensional ocean circulation model driven by atmospheric forcing (details are available at myroms.org, Haidvogel et al., 2008; Shchepetkin & McWilliams, 2005).…”

Section: Methodsmentioning

confidence: 99%

“…For the IBM, ROMS daily output was spatially interpolated using bilinear interpolation in order to obtain the physical variables associated with each modeled larvae. Larval locations (latitude, longitude, and depth) were determined using a fourth‐order predictor‐corrector algorithm that incorporated swimming, buoyancy, and vertical and horizontal random walks for diffusive motion (Stockhausen, et al., 2019). Larval movement was primarily passive (no orientation or directed swimming behavior) except for vertical movement to maintain larvae within preferred depth ranges (Table 1).…”

Section: Methodsmentioning

confidence: 99%

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Multiple life‐stage connectivity of Pacific halibut (Hippoglossus stenolepis) across the Bering Sea and Gulf of Alaska

Sadorus

Goldstein

Webster

et al. 2020

Fisheries Oceanography

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Pacific halibut (Hippoglossus stenolepis) is managed as a single stock throughout the Gulf of Alaska (GOA) and eastern Bering Sea (BS), but biogeographical barriers and the potential for differential impacts of climate change may alter habitat use and distributions, and restrict connectivity between these ecosystems. To improve our understanding of larval dispersal pathways and migrations of young fish within and between GOA and BS, we (a) examined potential pelagic larval dispersal and connectivity between the two basins using an individual‐based biophysical model (IBM) focusing on years with contrasting climatic conditions and (b) tracked movement of fish up to age‐6 years using annual age‐based distributions and a spatiotemporal modeling approach. IBM results suggest that the Aleutian Islands constrain connectivity between GOA and BS, but that large island passes serve as pathways between these ecosystems. The degree of connectivity between GOA and BS is influenced by spawning location such that an estimated 47%–58% of simulated larvae from the westernmost GOA spawning location arrived in the BS, with progressive reductions in connectivity from spawning grounds further east. From the results of spatial modeling of 2‐ to 6‐year‐old fish, we can infer ontogenetic migration from the inshore settlement areas of eastern BS toward Unimak Pass and GOA. The pattern of larval dispersal from GOA to BS, and subsequent post‐settlement migrations back from BS toward GOA, provides evidence of circular, multiple life stage, connectivity between these ecosystems, regardless of climatic variability or year‐class strength.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Multiple life‐stage connectivity of Pacific halibut (Hippoglossus stenolepis) across the Bering Sea and Gulf of Alaska

Sadorus

Goldstein

Webster

et al. 2020

Fisheries Oceanography

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“…Fish employing broadcast spawning strategies characterized by larval and juvenile pelagic drift in ocean currents are subject to large interannual variability in oceanic conditions (Stockhausen et al, 2018). Stockhausen et al (2018) refer to this as "running the gauntlet," as it is during this critical life stage that these fish are most vulnerable, experiencing the highest rates of mortality. This vulnerability is not only due to the vagaries of physical transport, but also due to their physiological condition where they must meet energetic demands of acquiring sufficient lipid reserves in order to move to inshore nursery areas.…”

Section: Genome-environment Associationmentioning

confidence: 99%

“…Ocean currents may advect YOY far offshore where they will fail to reach their shelf-slope nursery areas. Using ROMS-based models, Stockhausen et al (2018) showed that up to 70% of the YOY failed to reach suitable nursery habitats prior to wintertime and were not expected to survive. The ones that are not advected out of reach of nursery habitat must still acquire sufficient lipid reserves in order to settle out and overwinter.…”

Section: Fluctuating Selection and Maintenance Of Adaptive Diversitymentioning

confidence: 99%

Long‐lived marine species may be resilient to environmental variability through a temporal portfolio effect

Maselko

Andrews

Hohenlohe

2020

Ecology and Evolution

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Maintenance of genetic variation may provide resilience of populations to natural environmental variability. We used Pacific ocean perch (POP; Sebastes alutus) to test for the maintenance of adaptive variation across overlapping generations. POP are a long‐lived species characterized by widespread larval dispersal in their first year and a longevity of over 100 years. In order to understand how early marine dispersal affects POP survival and population structure, we used restriction site‐associated DNA sequencing (RADseq) to obtain 11,146 single‐nucleotide polymorphisms (SNPs) from 401 young‐of‐the‐year (YOY) POP collected during surveys conducted in 2014 (19 stations) and 2015 (4 stations) in the eastern Gulf of Alaska. Population clustering analysis showed that the POP samples represented four distinct ancestral populations mixed throughout the sampling area. Based on prior work on larval dispersal of POP, these larvae are most likely from distinct parturition locations that are mixing during their pelagic dispersal life stage. Latent factor mixed models revealed that POP larvae face significant selection during their first year at sea, which is specific to the year of their birth. Thus each adult cohort's genetic composition is heavily influenced by the environmental conditions experienced during their first year at sea. Long‐lived species relying on broadcast spawning strategies may therefore be uniquely resilient to environmental variability by maintaining a portfolio of cohort‐specific adaptive genotypes, and age truncation due to overfishing of older cohorts may have detrimental effect on the population viability.

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“…The mechanisms underlying these changes are summarized in Bakun, Field, Redondo‐Rodriguez, and Weeks (). In the Gulf of Alaska (GOA), recent studies have focused on the importance of larval drift and ecoregion connectivity in explaining age‐0 settlement locations of groundfish populations (Hinckley, Parada, Horne, Mazur, & Woillez, ; Stockhausen, Coyle, Hermann, Blood, et al., ; Stockhausen, Coyle, Hermann, Doyle, et al., ). Although climate‐induced shifts in the timing and location of spawning and larval distribution and survival could impact the spatial distribution of fish populations over time (Orensanz, Ernst, Armstrong, Stabeno, & Livingston, ; Parada, Armstrong, Ernst, Hinckley, & Orensanz, ), these early life history studies do not capture the short‐term response of age‐1+ fishes and the associated impacts of these changes on fisheries.…”

Section: Introductionmentioning

confidence: 99%

How “The Blob” affected groundfish distributions in the Gulf of Alaska

Yang

Cokelet

Stabeno

et al. 2019

Fisheries Oceanography

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We investigated the distributional shifts of groundfish in response to anomalous ocean conditions, particularly the recent anomalously warm period (2014–2016; “The Blob”), based on data from ten Gulf of Alaska bottom trawl surveys conducted by the Alaska Fisheries Science Center during 1996–2015. Six groundfish species were considered: Pacific cod (Gadus macrocephalus), arrowtooth flounder (Atheresthes stomias), walleye pollock (Gadus chalcogrammus), Pacific ocean perch (Sebastes alutus), northern rock sole (Lepidopsetta polyxystra), and southern rock sole (Lepidopsetta bilineata). Ontogenetic differences were examined by dividing data for each fish species into size classes. Our study demonstrated that after accounting for size‐specific depth preferences, the spatial responses of groundfish to anomalous ocean conditions differed by species and foraging guild in the central Gulf of Alaska. Pacific cod and arrowtooth flounder showed similar responses to ocean warming, but different responses to cooling. In general, Pacific cod moved to deeper depths in warmer years and moved to shallower depths in colder years. Arrowtooth flounder also moved deeper in warmer years. However, in colder years, large arrowtooth flounder (>40 cm) shifted toward shallower depths while smaller‐sized fish shifted toward deeper depths. In warmer years, large pollock (>30 cm) moved to deeper waters while smaller pollock (10–20 cm) moved to shallower waters. Pacific ocean perch exhibited an opposite response to thermal changes in habitat compared with Pacific cod and arrowtooth flounder. They moved deeper in colder years, but there was no clear change in depth as a function of size in response to warmer habitat.

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Running the gauntlet: Connectivity between natal and nursery areas for Pacific ocean perch (Sebastes alutus) in the Gulf of Alaska, as inferred from a biophysical individual-based model

Cited by 14 publications

References 62 publications

Multiple life‐stage connectivity of Pacific halibut (Hippoglossus stenolepis) across the Bering Sea and Gulf of Alaska

Multiple life‐stage connectivity of Pacific halibut (Hippoglossus stenolepis) across the Bering Sea and Gulf of Alaska

Long‐lived marine species may be resilient to environmental variability through a temporal portfolio effect

How “The Blob” affected groundfish distributions in the Gulf of Alaska

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