Feeding ecology of juvenile rockfishes off Oregon and Washington based on stomach content and stable isotope analyses

Bosley, Keith L.; Miller, Todd W.; Brodeur, Richard D.; Bosley, Katelyn M.; Gaest, Ahna Van; Elz, Anna

doi:10.1007/s00227-014-2513-8

Cited by 18 publications

(14 citation statements)

References 42 publications

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“…Both stomach content analyses and stable isotope data support the hypothesis that juvenile rockfish facilitate substantial cross‐shelf movement of carbon and other nutrients to the nearshore environment (Bosley et al. ).…”

Section: Nearshore Organisms With a Bipartite Life History As Subsidisupporting

confidence: 59%

“…The pelagic larval phase lasts for 1-6 months as larvae grow from approximately 3-7 mm to approximately 15-90 mm at settlement (Love et al 2002). Both stomach content analyses and stable isotope data support the hypothesis that juvenile rockfish facilitate substantial cross-shelf movement of carbon and other nutrients to the nearshore environment (Bosley et al 2014).…”

Section: Juvenile Rockfish (Sebastes Spp)supporting

confidence: 56%

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Coastal marine ecosystem connectivity: pelagic ocean to kelp forest subsidies

Zuercher

Galloway

2019

Ecosphere

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The movement of trophic resources between and among ecosystems, referred to as cross‐ecosystem subsidies, is a common phenomenon. In the marine environment, both adjacent and distant ecosystems are connected by oceanographic forces that transport nutrients, organisms, and other materials. Kelp forest ecosystems are one example of an open marine system that both exports and receives trophic subsidies. Though rocky reefs are rich in kelp‐based energy produced internally, kelp forest organisms also rely on phytoplankton, and the influx of holoplankton and meroplankton from adjacent open ocean habitats. In this paper, we seek to clarify the identity of holoplanktonic and meroplanktonic subsidies, quantify their energetic and nutrient contributions to the kelp forest, and further explore the impacts of these subsidies for individual consumers and for kelp forest communities. We reviewed six individual subsidy organisms that are commonly advected to kelp forests on the West coast of North America, and show that these organisms from the pelagic ocean represent important resource pulses for kelp forest consumers. In addition, we summarize the characteristics of subsidies, consumers, and recipient ecosystems that provide insight into the dynamics of subsidy influx and impacts to recipient systems. Finally, we provide suggestions as scientists move forward with efforts to quantify the impacts of cross‐ecosystem subsidies. Trophic subsidies are a major force shaping both marine and terrestrial communities and ecosystems. Quantitative information about these subsidies and their impacts on food webs will not only improve our understanding of these ecosystems, but also improve food web models, and predictions of ecosystem response to change.

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Section: Nearshore Organisms With a Bipartite Life History As Subsidisupporting

confidence: 59%

Section: Juvenile Rockfish (Sebastes Spp)supporting

confidence: 56%

Coastal marine ecosystem connectivity: pelagic ocean to kelp forest subsidies

Zuercher

Galloway

2019

Ecosphere

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“…; Miller and Brodeur ; Boldt and Rooper ; Bosley et al. ). The diet of individuals at the dock habitat in the present study more closely resembles that of offshore pelagic and kelp forest habitats, with increased consumption of pelagic species (e.g., hyperiid amphipods).…”

Section: Discussionmentioning

confidence: 99%

“…; Miller and Brodeur ; Studebaker and Mulligan , ; Boldt and Rooper ); the only studies performed in Oregon waters were in more offshore environments and on the pelagic life stage (Brodeur and Pearcy ; Bosley et al. ), although one agency report from 1977 examined the diet of unidentified benthic juvenile rockfish in Tillamook Bay estuary, Oregon (Forsberg et al. ).…”

mentioning

confidence: 99%

“…Ontogenetic, habitat, spatial, temporal, and species‐specific differences in diets have been observed for both pelagic and benthic juvenile rockfish (Carlson and Haight ; Brodeur and Pearcy ; Singer ; Boldt and Rooper ; Bosley et al. ). With large dietary variations, further investigation into feeding ecology of juvenile benthic rockfishes at multiple habitat types in Oregon estuaries is necessary to evaluate the role that these potential nursery areas play in foraging.…”

mentioning

confidence: 99%

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A Feeding‐Ecology‐Based Approach to Evaluating Nursery Potential of Estuaries for Black Rockfish

Schwartzkopf

Heppell

2020

Mar Coast Fish

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Previous work suggests that Oregon estuaries function as nursery habitat and may play an important role in settlement of Black Rockfish Sebastes melanops. No research, however, has been conducted on juvenile Black Rockfish feeding ecology in estuarine habitats, which is necessary to evaluate habitat use and quality. We examined stomach contents and carbon and nitrogen stable isotope ratios for juvenile Black Rockfish collected from May to September in 2016 and 2017 at both anthropogenic (dock) and natural (eelgrass Zostera marina) habitats in Yaquina Bay, a marine-dominated estuary on the central Oregon coast. We found consumption of 94 different prey items, the majority of which are estuary derived, and benthic prey were most frequently consumed. In general, it appears that fish are feeding in the habitat in which they are caught, with marine-fouling prey being consumed in greater abundances at the dock habitat, whereas algae-or eelgrass-associated species were consumed in greater abundances at the eelgrass habitat. The increase in both δ 15 N and δ 13 C values in muscle tissue seasonally and the positive correlation with upwelling in 2016 suggests that upwelled, oceanic waters were the primary source of nutrients to Yaquina Bay in 2016. The high variability in δ 15 N and general increase in δ 13 C seasonally in 2017 suggests that oceanic waters were still present but may not have been the dominant nutrient source. Yaquina Bay appears to be an important foraging ground for juvenile Black Rockfish during summer months, providing a diversity of prey items, with special importance of benthic and eelgrass-associated prey. Our results support the hypothesis that estuaries can function as a nursery habitat for Black Rockfish, although additional data is needed to provide an absolute designation. Changes in benthic communities or available habitat may have negative effects on foraging ability, and thus nursery function, and should be considered during management decisions.

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Evidence that summer jellyfish blooms impact Pacific Northwest salmon production

2016

Self Cite

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Interannual variability in salmon (Oncorhynchus spp.) production in the northeast Pacific is understood to be driven by oceanographic variability and bottom‐up processes affecting prey availability to juvenile salmon. Scyphozoan jellyfish have an important role in shaping the pathways of energy flow through pelagic food webs. While jellyfish obtain high production rates and biomasses as major consumers of zooplankton production, they have few predators and may divert plankton production away from higher trophic levels. Although jellyfish are planktivorous and juvenile coho (O. kisutch) and Chinook (O. tshawytscha) salmon are mainly piscivorous, they may be indirect competitors for plankton production. Ecosystem model simulations suggested that among all trophic interactions within the Pacific Northwest coastal food web, juvenile salmon are particularly sensitive to jellyfish blooms, and that salmon production will be suppressed in years of high summer jellyfish biomass. Pelagic surveys off Oregon and Washington (1999–2012) were used to examine the interannual relationship between salmon production and the dominant jellyfish species, the sea nettle Chrysaora fuscescens, off the Pacific Northwest coast. There was a significant, negative correlation between sea nettle biomass and the strength of adult coho and Chinook salmon returns to the Columbia River. Examination of spatial distributions across years showed a positive association between sea nettles and salmon. Within individual years, significant differences between the distribution of sea nettles and yearling coho and Chinook salmon generally occurred during cooler ocean summers, perhaps due to the greater expanse of optimal salmon habitat resulting from more upwelling. Whether the association is behavioral or a product of oceanographic processes, association enhances the opportunity for indirect competition. Examination of feeding incidence in September showed that salmon stomachs were less full at locations with higher sea nettle biomass.

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Feeding ecology of juvenile rockfishes off Oregon and Washington based on stomach content and stable isotope analyses

Cited by 18 publications

References 42 publications

Coastal marine ecosystem connectivity: pelagic ocean to kelp forest subsidies

Coastal marine ecosystem connectivity: pelagic ocean to kelp forest subsidies

A Feeding‐Ecology‐Based Approach to Evaluating Nursery Potential of Estuaries for Black Rockfish

Evidence that summer jellyfish blooms impact Pacific Northwest salmon production

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