Community structure and biomass of larval euphausiids and postlarval mysids in relation to anomalous warming events during a weekly time series (2014–2017) at Cabo Pulmo National Park, Mexico

Ventura‐Domínguez, Phalom Denohi; Gómez‐Gutiérrez, Jaime; Silva-Dávila, Roxana De; González‐Rodríguez, Eduardo; Sánchez-Uvera, Arturo R.; Silveyra-Bustamante, Angel Antonio; Trasviña-Castro, Armando; Aburto‐Oropeza, Octavio; Sánchez, Carlos

doi:10.1016/j.pocean.2022.102881

Cited by 6 publications

(1 citation statement)

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“…Although coastal GOA zooplankton communities are poorly characterized relative to the pelagic GOA 60 , 61 , our observed shifts in diet composition during MHWs may be reflective of changes to the nearshore given that Pacific cod are considered opportunistic predators 62 . In the southern California Current, mysid abundance increased during the 2014–2016 MHW 63 , and the similar increase of mysids in Pacific cod diet composition observed during GOA MHWs may be due to changes in their spatial, temporal, or depth distributions that increased their accessibility to juvenile Pacific cod. Neomysis kadiakensis and Exacanthomysis arctopacifica, the two most abundant species of mysids consumed in this study, aggregate in large groups that migrate between the benthos and the water column 64 , and their distributions may be influenced by stratification in the water column and shifts in nearshore circulation patterns 65 .…”

Section: Discussionmentioning

confidence: 76%

Marine heatwaves alter the nursery function of coastal habitats for juvenile Gulf of Alaska Pacific cod

Thalmann,

Laurel,

Almeida

et al. 2024

Sci Rep

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Marine Heatwaves (MHWs) can directly influence survival of marine fishes, particularly for early life stages, including age-0 juveniles during their residence in coastal nursery habitats. However, the ability of nurseries to support high fish densities, optimize foraging and growth, and protect against predators may be altered during MHWs. Gulf of Alaska Pacific cod (Gadus macrocephalus) larval, juvenile, and adult abundances declined dramatically following MHW events in 2014–2016 and 2019. To evaluate coastal nursery function during MHWs, we compared diet composition, recent growth, size, condition, and abundance of age-0 juveniles throughout their first summer before, during, and between MHWs. Diet shifted to larger prey during MHWs, particularly mysids, but diet did not appear to influence growth. We observed faster growth rates during MHWs, yet even when accounting for growth, we could not explain the higher body sizes observed in August during MHWs. Together with lower abundance and the near absence of small fish in the nursery by August during MHWs, these patterns highlight potential for size-selection and a reduced ability of nursery habitats to buffer against environmental variability during MHWs, with only a small number of large “super survivors” persisting through the summer.

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