Comparative feeding ecology of two sympatric rockfish congeners, Sebastes caurinus (copper rockfish) and S. maliger (quillback rockfish)

Murie, Debra J.

doi:10.1007/bf00363908

Cited by 41 publications

(41 citation statements)

References 13 publications

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“…Also, demersal crustaceans are more important diet items for subadult than for adult rockfish (Murie 1995), and our methods tallied demersal crustaceans accurately. Demersal shrimps-namely Pandalus danae and smaller-bodied genera unidentifiable from stomach contents-are major prey items year round (Murie 1995). At our sites, small-bodied genera of shrimp consisted primarily of Eualus, Heptacarpus and Lebbeus, which we aggregated into one group named EUHEL.…”

Section: Methodsmentioning

confidence: 87%

Predatory fishes affect trophic cascades and apparent competition in temperate reefs

Frid

Marliave

2010

Biol. Lett.

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We provide evidence for a trophic cascade involving apex predators and mesopredators of marine temperate reefs, lingcod and rockfish, respectively. We measured spatio-temporal variation in the relative abundance of lingcod, subadult rockfish and two shrimp groups eaten by rockfish (Pandalus sp. and three smallerbodied genera aggregated). Lingcod had an indirect positive effect on shrimps, as mediated by the direct negative effects of lingcod on rockfish and of rockfish on shrimps. These top-down effects on shrimps, however, were stronger for Pandalus than for small-bodied shrimps. Further, abundances of Pandalus and smallbodied shrimps were negatively correlated and the latter had a stronger positive effect on rockfish, suggesting that rockfish mediated asymmetrical apparent competition between shrimps. Our results indicate mechanisms by which predatory fishes may influence the structure of marine communities.

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Section: Methodsmentioning

confidence: 87%

Predatory fishes affect trophic cascades and apparent competition in temperate reefs

Frid

Marliave

2010

Biol. Lett.

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“…Our value for Z. conchifer is within the range given by Macpherson (1983) for larger shelf fishes off Namibia (mean VI = 42.2%) and by Gomes et al (1998) for fishes off the Azores (mean VI = 74.03%). Similarly, VI values for Sebastes caurinus and S. maliger off British Columbia varied between 20 and 60%, depending on season (Murie 1995). These species are comparable to Z. conchifer in terms of trophic level and size.…”

Section: Diet Compositionmentioning

confidence: 89%

Diel and habitat-dependent resource utilisation of deep-sea fishes at the Great Meteor seamount (subtropical NE Atlantic): niche overlap and support for the sound-scattering layer-interception hypothesis

Fock

Matthiessen²,

Zidowitz³

et al. 2002

Mar. Ecol. Prog. Ser.

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(1) primarily pelagic food utilisation for bentho-pelagic fishes; (2) increased habitat-dependent utilisation rates at locations of interception with the sound-scattering layer; (3) diel changes in utilisation rates due to availability of prey; (4) sufficient resource partitioning among species in order to avoid competitive exclusion.KEY WORDS: Permutation test · Hutchinson's rule · Sound-scattering layer · Bentho-pelagic fishes · SeamountsResale or republication not permitted without written consent of the publisher

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“…During the time that they are present, juvenile Pacific herring have been observed to dominate rockfish diets ( particularly for larger rockfish; [45]), and both rockfishes [46] and greenling [47] have been observed to also prey on herring eggs, which are deposited on macro-algae and rocky substrates in the inter-tidal and shallow sub-tidal zone during seasonal spring-spawning events. Owing to the high calorific content of herring and their eggs, these resources may contribute a substantial proportion of the annual energy budget of reef fish in this study system [45]. Similarly, newly recruited juveniles of reef-associated species are likely to be important prey for larger fishes, both in our study system and for reef fish more generally.…”

Section: Discussionmentioning

confidence: 99%

The paradox of inverted biomass pyramids in kelp forest fish communities

et al. 2016

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Theory predicts that bottom-heavy biomass pyramids or 'stacks' should predominate in real-world communities if trophic-level increases with body size (mean predator-to-prey mass ratio (PPMR) more than 1). However, recent research suggests that inverted biomass pyramids (IBPs) characterize relatively pristine reef fish communities. Here, we estimated the slope of a kelp forest fish community biomass spectrum from underwater visual surveys. The observed biomass spectrum slope is strongly positive, reflecting an IBP. This is incongruous with theory because this steep positive slope would only be expected if trophic position decreased with increasing body size (consumer-to-resource mass ratio, less than 1). We then used d 15 N signatures of fish muscle tissue to quantify the relationship between trophic position and body size and instead detected strong evidence for the opposite, with PPMR % 1650 (50% credible interval 280-12 000). The natural history of kelp forest reef fishes suggests that this paradox could arise from energetic subsidies in the form of movement of mobile consumers across habitats, and from seasonally pulsed production inputs at small body sizes. There were four to five times more biomass at large body sizes (1-2 kg) than would be expected in a closed steady-state community providing a measure of the magnitude of subsidies.

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Comparative feeding ecology of two sympatric rockfish congeners, Sebastes caurinus (copper rockfish) and S. maliger (quillback rockfish)

Cited by 41 publications

References 13 publications

Predatory fishes affect trophic cascades and apparent competition in temperate reefs

Predatory fishes affect trophic cascades and apparent competition in temperate reefs

Diel and habitat-dependent resource utilisation of deep-sea fishes at the Great Meteor seamount (subtropical NE Atlantic): niche overlap and support for the sound-scattering layer-interception hypothesis

The paradox of inverted biomass pyramids in kelp forest fish communities

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