Recruitment of the Squat Lobster Pleuroncodes Monodon on the Continental Shelf Off Central Chile

Gallardo, V. A.; Cañete, Juan I.; Roa, Rubén; Enríquez-Briones, S.; Baltazar, Mario

doi:10.1163/193724094x00632

Cited by 14 publications

(2 citation statements)

References 6 publications

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“…In this case, P. monodon could be a key player in benthic-pelagic coupling, comparable to the squat lobster M. gregaria found inter alia off Chile (Funes et al, 2018). Gallardo et al (1994) suggested that mats of sulfur bacteria may serve as refuge and food source for P. monodon offspring. Polychaetes could be another potential benthic food source, for example Paraprionospio pinnata is known to dominate the benthic macrofauna off central Chile during non-El Niño years (Contreras et al, 2007).…”

Section: Food-web Structure and Key Players Of The Northern Humboldt Current Upwelling Systemmentioning

confidence: 55%

“…Therefore, a fully pelagic lifestyle (e.g., Gutiérrez et al, 2008) seems to be possible, at least temporarily. Most likely, squat lobsters feed rather opportunistically on benthic invertebrates and sulfur bacteria mats on the seafloor as well as on phyto-and zooplankton in the surface layer (Gallardo et al, 1994;Contreras et al, 2007;Funes et al, 2018).…”

Section: Food-web Structure and Key Players Of The Northern Humboldt Current Upwelling Systemmentioning

confidence: 99%

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Toward a Solution of the “Peruvian Puzzle”: Pelagic Food-Web Structure and Trophic Interactions in the Northern Humboldt Current Upwelling System Off Peru

et al. 2022

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The northern Humboldt Current upwelling system (HCS) belongs to the most productive marine ecosystems, providing five to eight times higher fisheries landings per unit area than other coastal upwelling systems. To solve this “Peruvian puzzle”, to elucidate the pelagic food-web structure and to better understand trophic interactions in the HCS, a combined stable isotope and fatty acid trophic biomarker approach was adopted for key zooplankton taxa and higher trophic positions with an extensive spatial coverage from 8.5 to 16°S and a vertical range down to 1,000 m depth. A pronounced regional shift by up to ∼5‰ in the δ15N baseline of the food web occurred from North to South. Besides regional shifts, δ15N ratios of particulate organic matter (POM) also tended to increase with depth, with differences of up to 3.8‰ between surface waters and the oxygen minimum zone. In consequence, suspension-feeding zooplankton permanently residing at depth had up to ∼6‰ higher δ15N signals than surface-living species or diel vertical migrants. The comprehensive data set covered over 20 zooplankton taxa and indicated that three crustacean species usually are key in the zooplankton community, i.e., the copepods Calanus chilensis at the surface and Eucalanus inermis in the pronounced OMZ and the krill Euphausia mucronata, resulting in an overall low number of major trophic pathways toward anchovies. In addition, the semi-pelagic squat lobster Pleuroncodes monodon appears to play a key role in the benthic-pelagic coupling, as indicated by highest δ13C’ ratios of −14.7‰. If feeding on benthic resources and by diel vertical migration, they provide a unique pathway for returning carbon and energy from the seafloor to the epipelagic layer, increasing the food supply for pelagic fish. Overall, these mechanisms result in a very efficient food chain, channeling energy toward higher trophic positions and partially explaining the “Peruvian puzzle” of enormous fish production in the HCS.

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Section: Food-web Structure and Key Players Of The Northern Humboldt Current Upwelling Systemmentioning

confidence: 55%

Section: Food-web Structure and Key Players Of The Northern Humboldt Current Upwelling Systemmentioning

confidence: 99%

Toward a Solution of the “Peruvian Puzzle”: Pelagic Food-Web Structure and Trophic Interactions in the Northern Humboldt Current Upwelling System Off Peru

et al. 2022

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Ecological theory and continental margins: where shallow meets deep

Levin

Dayton

2009

Trends in Ecology & Evolution

177

114

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Reproductive tactics and larval development of bigeye flounder, Hippoglossina macrops, off central Chile

et al. 2006

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Through a series of ichthyoplankton surveys carried out off central Chile, we characterize the offshore spawning and coastal nursery ground of the bigeye flounder Hippoglossina macrops. Eggs were collected in higher abundances over the continental shelf during late winter, over the shelf-break in mid spring, and at the continental slope in late summer, showing a seasonal depth gradient in spawning. No significant spawning was detected nearshore (less than 8 km offshore). Field data suggest a longitudinal progression from offshore to onshore of larval stages from preflexion to transformation stage. Finally, vertically stratified samples showed that eggs and larvae were present mainly in the upper 100 m. We discuss the potential onshore transport of early life stages of H. macrops through the compensatory flow of Equatorial Subsurface Waters that balances the surface offshore transport in the Ekman layer during upwelling events. Additionally, larval development from yolk-sac to transformation stage is briefly described.

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Recruitment of the Squat Lobster Pleuroncodes Monodon on the Continental Shelf Off Central Chile

Cited by 14 publications

References 6 publications

Toward a Solution of the “Peruvian Puzzle”: Pelagic Food-Web Structure and Trophic Interactions in the Northern Humboldt Current Upwelling System Off Peru

Toward a Solution of the “Peruvian Puzzle”: Pelagic Food-Web Structure and Trophic Interactions in the Northern Humboldt Current Upwelling System Off Peru

Ecological theory and continental margins: where shallow meets deep

Reproductive tactics and larval development of bigeye flounder, Hippoglossina macrops, off central Chile

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