The German Bight (North Sea) is a nursery area for both locally and externally produced sprat juveniles

Baumann, Hannes; Malzahn, Arne M.; Voss, R.; Temming, Axel

doi:10.1016/j.seares.2009.01.004

Cited by 20 publications

(11 citation statements)

References 33 publications

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“…Similarly, Aldanondo et al (2011) described otolith growth of anchovy during the first growth season with a Gompertz model and observed a similar pattern to that observed for juveniles in the sea cage. A similar growth pattern has been reported previously in other pelagic fish species (Cotano and Á lvarez 2003;Xie and Watanabe 2005;Baumann et al 2009). …”

Section: Validation Of Daily Increment Deposition Ratesupporting

confidence: 89%

Validation of the first annual increment deposition in the otoliths of European anchovy in the Bay of Biscay based on otolith microstructure analysis

Aldanondo

Cotano

Álvarez

et al. 2016

Mar. Freshwater Res.

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Section: Validation Of Daily Increment Deposition Ratesupporting

confidence: 89%

Validation of the first annual increment deposition in the otoliths of European anchovy in the Bay of Biscay based on otolith microstructure analysis

Aldanondo

Cotano

Álvarez

et al. 2016

Mar. Freshwater Res.

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“…aTotal dry mass of plankton in the length range from 0.04 to 2 mm.bEstimated from adult spawning season [20]–[22], [115].cEstimated from World Ocean Atlas 2009 [24].dCalculated for a latitude of 54.5° N [25]. L : standard length, M : dry mass, T : temperature, G : specific growth rate.…”

Section: Methodsmentioning

confidence: 99%

A Day in the Life of Fish Larvae: Modeling Foraging and Growth Using Quirks

Huebert¹,

Peck²

2014

PLoS ONE

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This article introduces “Quirks,” a generic, individual-based model synthesizing over 40 years of empirical and theoretical insights into the foraging behavior and growth physiology of marine fish larvae. In Quirks, different types of larvae are defined by a short list of their biological traits, and all foraging and growth processes (including the effects of key environmental factors) are modeled following one unified set of mechanistic rules. This approach facilitates ecologically meaningful comparisons between different species and environments. We applied Quirks to model young exogenously feeding larvae of four species: 5.5-mm European anchovy (Engraulis encrasicolus), 7-mm Atlantic cod (Gadus morhua), 13-mm Atlantic herring (Clupea harengus), and 7-mm European sprat (Sprattus sprattus). Modeled growth estimates explained the majority of variability among 53 published empirical growth estimates, and displayed very little bias: 0.65%±1.2% d−1 (mean ± standard error). Prey organisms of ∼67% the maximum ingestible prey length were optimal for all larval types, in terms of the expected ingestion per encounter. Nevertheless, the foraging rate integrated over all favorable prey sizes was highest when smaller organisms made up >95% of the prey biomass under the assumption of constant normalized size spectrum slopes. The overall effect of turbulence was consistently negative, because its detrimental influence on prey pursuit success exceeded its beneficial influence on prey encounter rate. Model sensitivity to endogenous traits and exogenous environmental factors was measured and is discussed in depth. Quirks is free software and open source code is provided.

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“…These interannual growth variations could be attributed to differences in the experienced temperature or feeding conditions (Folkvord et al ., ). Several field studies have reported a positive correlation between growth rates and temperature (Baumann et al ., ). However, in our study, the warmest temperatures recorded in 2006 did not correspond to the highest somatic growth rates.…”

Section: Discussionmentioning

confidence: 87%

“…This trend suggests that the otolith growth rates are primarily related to endogenous factors, although they could be modulated by environmental variables (García et al ., ; Alemany et al ., ; Baumann et al ., ). A similar growth pattern has been found previously in other pelagic fish species (Cotano and Álvarez, ; Xie and Watanabe, ; Alemany et al ., ; Baumann et al ., ).…”

Section: Discussionmentioning

confidence: 99%

Interannual differences in growth and hatch‐date distributions of early juvenile European anchovy in the Bay of Biscay: implications for recruitment

Aldanondo

Cotano

Goikoetxea

et al. 2016

Fisheries Oceanography

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In order to understand better the recruitment variability in European anchovy in the Bay of Biscay, it is important to investigate the processes that affect survival during the early life stages. Anchovy juvenile growth trajectories and hatch‐date distributions were inferred over a 3‐year period based on otolith microstructure analysis. Otolith growth trajectories showed a characteristic shape depending on their hatch‐date timing. Earlier‐born juveniles had notably broader maximum increments than later born conspecifics, resulting in higher growth rates. This observation suggests that early hatching would be beneficial for larval and juvenile growth, and, therefore, survival. The estimated juvenile hatch‐date distributions were relatively narrow compared with the extended anchovy spawning season (March–August) in the Bay of Biscay and indicated that only individuals originated mainly from the summer months (June–August) survived until autumn. Hatch‐date distributions were markedly different among years and seemed to influence the interannual recruitment strength of anchovy. We conclude that years characterized by juvenile survivors originating from the peak spawning period (May and June) would lead to considerable recruitment success. Downwelling events during the peak spawning period seem to affect larval survival. Furthermore, size‐dependent overwinter mortality would be an additional process that regulates recruitment strength in the anchovy population in the Bay of Biscay.

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The German Bight (North Sea) is a nursery area for both locally and externally produced sprat juveniles

Cited by 20 publications

References 33 publications

Validation of the first annual increment deposition in the otoliths of European anchovy in the Bay of Biscay based on otolith microstructure analysis

Validation of the first annual increment deposition in the otoliths of European anchovy in the Bay of Biscay based on otolith microstructure analysis

A Day in the Life of Fish Larvae: Modeling Foraging and Growth Using Quirks

Interannual differences in growth and hatch‐date distributions of early juvenile European anchovy in the Bay of Biscay: implications for recruitment

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