Learning swimming escape patterns for larval fish under energy constraints

Ioannis Mandralis; Pascal Weber; Guido Novati; Petros Koumoutsakos

doi:10.1103/physrevfluids.6.093101

Effects of temperature on larval fish swimming performance: the importance of physics to physiology

Journal of Fish Biology ◽

10.1016/s0022-1112(02)92118-5 ◽

2002 ◽

Vol 0 ◽

Author(s):

I Hunt von Herbing

Keyword(s):

Larval Fish ◽

Swimming Performance ◽

Fish Swimming ◽

Effects Of Temperature

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

Marine Ecology Progress Series ◽

10.3354/meps13300 ◽

2020 ◽

Vol 650 ◽

pp. 7-18 ◽

Cited By ~ 1

Author(s):

HW Fennie ◽

S Sponaugle ◽

EA Daly ◽

RD Brodeur

Keyword(s):

Life History ◽

Early Life ◽

Life History Traits ◽

Direct Evidence ◽

Coho Salmon ◽

Larval Fish ◽

Early Life History ◽

In The Wild ◽

Otolith Microstructure Analysis ◽

Pelagic Juvenile

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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Climate-associated trends and variability in ichthyoplankton phenology from the longest continuous larval fish time series on the east coast of the United States

Marine Ecology Progress Series ◽

10.3354/meps13404 ◽

2020 ◽

Vol 650 ◽

pp. 269-287

Author(s):

WC Thaxton ◽

JC Taylor ◽

RG Asch

Keyword(s):

United States ◽

Environmental Variability ◽

Larval Fish ◽

Interspecific Interactions ◽

River Estuary ◽

Atlantic Multidecadal Oscillation ◽

The United States ◽

Larval Survival ◽

Ecological Communities ◽

Northerly Wind

As the effects of climate change become more pronounced, variation in the direction and magnitude of shifts in species occurrence in space and time may disrupt interspecific interactions in ecological communities. In this study, we examined how the fall and winter ichthyoplankton community in the Newport River Estuary located inshore of Pamlico Sound in the southeastern United States has responded to environmental variability over the last 27 yr. We relate the timing of estuarine ingress of 10 larval fish species to changes in sea surface temperature (SST), the Atlantic Multidecadal Oscillation, the North Atlantic Oscillation, wind strength and phenology, and tidal height. We also examined whether any species exhibited trends in ingress phenology over the last 3 decades. Species varied in the magnitude of their responses to all of the environmental variables studied, but most shared a common direction of change. SST and northerly wind strength had the largest impact on estuarine ingress phenology, with most species ingressing earlier during warm years and delaying ingress during years with strong northerly winds. As SST warms in the coming decades, the average date of ingress of some species (Atlantic croaker Micropogonias undulatus, summer flounder Paralichthys dentatus, pinfish Lagodon rhomboides) is projected to advance on the order of weeks to months, assuming temperatures do not exceed a threshold at which species can no longer respond through changes in phenology. These shifts in ingress could affect larval survival and growth since environmental conditions in the estuarine and pelagic nursery habitats of fishes also vary seasonally.

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Using self organizing maps to analyze larval fish assemblage vertical dynamics through environmental-ontogenetic gradients

Estuarine Coastal and Shelf Science ◽

10.1016/j.ecss.2021.107410 ◽

2021 ◽

pp. 107410

Author(s):

I. Álvarez ◽

J.S. Font-Muñoz ◽

I. Hernández-Carrasco ◽

C. Díaz-Gil ◽

P.M. Salgado-Hernanz ◽

...

Keyword(s):

Fish Assemblage ◽

Larval Fish ◽

Self Organizing Maps ◽

Self Organizing

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Low energy constraints from absolute neutrino mass observables and lepton flavor violation in left-right symmetric model

Physical Review D ◽

10.1103/physrevd.103.055016 ◽

2021 ◽

Vol 103 (5) ◽

Author(s):

Srubabati Goswami ◽

K. N. Vishnudath

Keyword(s):

Neutrino Mass ◽

Low Energy ◽

Symmetric Model ◽

Lepton Flavor Violation ◽

Lepton Flavor ◽

Flavor Violation ◽

Energy Constraints ◽

Absolute Neutrino Mass

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Efficacy of DNA barcoding for the identification of larval fish species in the Upper and Middle Ing River, Thailand

Gene Reports ◽

10.1016/j.genrep.2021.101057 ◽

2021 ◽

Vol 23 ◽

pp. 101057

Author(s):

Dutrudi Panprommin ◽

Kanyanat Soontornprasit ◽

Siriluck Tuncharoen ◽

Niti Iamchuen

Keyword(s):

Dna Barcoding ◽

Fish Species ◽

Larval Fish

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Energy constraints on brain network formation

Scientific Reports ◽

10.1038/s41598-021-91250-y ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Kosuke Takagi

Keyword(s):

Network Formation ◽

Cost Minimization ◽

Brain Network ◽

Network Activity ◽

Rich Functionality ◽

Energy Constraints ◽

Dependent Form ◽

Statistical Similarity ◽

Simple Ratio ◽

The Brain

AbstractEnergy constraints are a fundamental limitation of the brain, which is physically embedded in a restricted space. The collective dynamics of neurons through connections enable the brain to achieve rich functionality, but building connections and maintaining activity come at a high cost. The effects of reducing these costs can be found in the characteristic structures of the brain network. Nevertheless, the mechanism by which energy constraints affect the organization and formation of the neuronal network in the brain is unclear. Here, it is shown that a simple model based on cost minimization can reproduce structures characteristic of the brain network. With reference to the behavior of neurons in real brains, the cost function was introduced in an activity-dependent form correlating the activity cost and the wiring cost as a simple ratio. Cost reduction of this ratio resulted in strengthening connections, especially at highly activated nodes, and induced the formation of large clusters. Regarding these network features, statistical similarity was confirmed by comparison to connectome datasets from various real brains. The findings indicate that these networks share an efficient structure maintained with low costs, both for activity and for wiring. These results imply the crucial role of energy constraints in regulating the network activity and structure of the brain.

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