Interannual and regional variability in settlement of groundfishes to protected and fished nearshore waters of Oregon, USA

Ottmann, Daniel; Grorud-Colvert, Kirsten; Huntington, Brittany; Sponaugle, Su

doi:10.3354/meps12616

Cited by 10 publications

(4 citation statements)

References 49 publications

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“…Newly hatched larvae range from 4.4 to 6.5 mm, and flexion occurs around 7.5-8.7 mm (Matarese et al, 1989). Larvae metamorphose into pelagic juveniles at around 14 mm standard length (L s ) and remain pelagic until at least 35 mm L s , but pelagic juveniles as large as 60 mm L s have been observed (Ottmann et al, 2018). The pelagic larval and juvenile periods last c. 3-4 months (O'Connell, 1953).…”

Section: Introductionmentioning

confidence: 99%

“…Almost nothing is known about the patterns of population replenishment or recruitment (but see Ottmann et al, 2018). For this reason, there is interest in examining otolith microstructure in larval and juvenile cabezon to identify early life-history traits that may be important determinants of recruitment strength.…”

Section: Introductionmentioning

confidence: 99%

“…Cabezon is a socio‐economically important species in commercial and recreational fisheries throughout its range, but the patterns and processes driving adult population dynamics are not well understood. Almost nothing is known about the patterns of population replenishment or recruitment (but see Ottmann et al ., 2018). For this reason, there is interest in examining otolith microstructure in larval and juvenile cabezon to identify early life‐history traits that may be important determinants of recruitment strength.…”

Section: Introductionmentioning

confidence: 99%

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Testing assumptions underlying cabezon (Scorpaenichthys marmoratus) otolith microstructure analysis using wild‐caught juveniles and opportunistic rearing of eggs and larvae

Wilson

Sponaugle

Grorud-Colvert

2023

Journal of Fish Biology

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Otolith microstructure analysis provides critical biological and ecological information about the early life history of fishes. This information is particularly important to interpret and predict population dynamics for socio‐economically important fisheries species; nonetheless, several key assumptions underpin the use of otolith techniques. The authors validated the use of this analysis for cabezon (Scorpaenichthys marmoratus; Ayres, 1854), a long‐lived, large‐bodied cottid constituent of nearshore fisheries from Baja California, Mexico, to Alaska, USA. To test three critical assumptions, the authors coupled otolith and morphometric analyses from an opportunistic rearing study of cabezon eggs and larvae with a long‐term time series of juvenile cabezon field collections. The authors confirmed the daily otolith increment deposition in laboratory‐reared larvae, identified the timing of first otolith increment deposition and examined the relationship between otolith growth and somatic growth in field‐collected juveniles, validating the use of otolith microstructure analysis in biological and ecological interpretations of early life‐history traits for this species. The findings of this study also indicated that the absorption of yolk‐sac reserves, and likely the transition to exogenous feeding, plays an important role in regulating otolith increment deposition. Finally, the authors found within‐brood size‐at‐age variation, which may be an advantage for young fish in prey‐limited environments.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Testing assumptions underlying cabezon (Scorpaenichthys marmoratus) otolith microstructure analysis using wild‐caught juveniles and opportunistic rearing of eggs and larvae

Wilson

Sponaugle

Grorud-Colvert

2023

Journal of Fish Biology

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“…The larvae of quillback rockfish S. maliger, an important nearshore species, are extruded in March− June (Love et al 2002), and pelagic larvae and juveniles spend ~1−2 mo in the upper water column before recruiting to nearshore benthic habitats. In Oregon, USA, quillback rockfish juveniles typically settle from June through August, but can settle as early as May and as late as September and arrive to nearshore habitats at ~15−40 mm standard length (SL; Ottmann et al 2018). In contrast, juvenile coho salmon from Oregon and Washington spawn in freshwater streams (or in many cases are of hatchery origin) and inhabit freshwater for 1 yr prior to entering the ocean in spring.…”

Section: Introductionmentioning

confidence: 99%

Prey tell: what quillback rockfish early life history traits reveal about their survival in encounters with juvenile coho salmon

Fennie

Sponaugle

Daly

et al. 2020

Mar. Ecol. Prog. Ser.

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Predation is a major source of mortality in the early life stages of fishes and a driving force in shaping fish populations. Theoretical, modeling, and laboratory studies have generated hypotheses that larval fish size, age, growth rate, and development rate affect their susceptibility to predation. Empirical data on predator selection in the wild are challenging to obtain, and most selective mortality studies must repeatedly sample populations of survivors to indirectly examine survivorship. While valuable on a population scale, these approaches can obscure selection by particular predators. In May 2018, along the coast of Washington, USA, we simultaneously collected juvenile quillback rockfish Sebastes maliger from both the environment and the stomachs of juvenile coho salmon Oncorhynchus kisutch. We used otolith microstructure analysis to examine whether juvenile coho salmon were age-, size-, and/or growth-selective predators of juvenile quillback rockfish. Our results indicate that juvenile rockfish consumed by salmon were significantly smaller, slower growing at capture, and younger than surviving (unconsumed) juvenile rockfish, providing direct evidence that juvenile coho salmon are selective predators on juvenile quillback rockfish. These differences in early life history traits between consumed and surviving rockfish are related to timing of parturition and the environmental conditions larval rockfish experienced, suggesting that maternal effects may substantially influence survival at this stage. Our results demonstrate that variability in timing of parturition and sea surface temperature leads to tradeoffs in early life history traits between growth in the larval stage and survival when encountering predators in the pelagic juvenile stage.

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Growth of juvenile black rockfish (Sebastes melanops) during estuarine residence

et al. 2021

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Interannual and regional variability in settlement of groundfishes to protected and fished nearshore waters of Oregon, USA

Cited by 10 publications

References 49 publications

Testing assumptions underlying cabezon (Scorpaenichthys marmoratus) otolith microstructure analysis using wild‐caught juveniles and opportunistic rearing of eggs and larvae

Testing assumptions underlying cabezon (Scorpaenichthys marmoratus) otolith microstructure analysis using wild‐caught juveniles and opportunistic rearing of eggs and larvae

Prey tell: what quillback rockfish early life history traits reveal about their survival in encounters with juvenile coho salmon

Growth of juvenile black rockfish (Sebastes melanops) during estuarine residence

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