Observations on the California Sea Otter

Limbaugh, Conrad

doi:10.2307/1376856

Cited by 7 publications

(3 citation statements)

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“…Flexible multilayered fur found on many parts of Enhydra lutris [76][77][78][79][80] provides inspiration for an architected design to achieve multistage load bearing that can avoid undesirable collapse. Enhydra lutris (figure 1(a)) mainly lives in the cold waters of the North Pacific [81].…”

Section: Introductionmentioning

confidence: 99%

“…Enhydra lutris (figure 1(a)) mainly lives in the cold waters of the North Pacific [81]. As opposed to animals with thick subcutaneous fat (e.g., the polar bear and the elephant seal), Enhydra lutris adopts densely distributed, multilayered fur to protect itself against the cold and other environmental impacts (e.g., sea waves, rocks and wind) [76,77,79,80]. Figure 1(b) presents a schematic illustration of the multilayered structure of Enhydra lutris fur, which consists of a bottom villus layer (dense) and a top seta layer (loose).…”

Section: Introductionmentioning

confidence: 99%

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Bioinspired design and assembly of a multilayer cage-shaped sensor capable of multistage load bearing and collapse prevention

Xu¹,

Liu²,

Jin³

et al. 2021

Nanotechnology

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Flexible bioinspired mesostructures and electronic devices have recently attracted intense attention because of their widespread application in microelectromechanical systems (MEMS), reconfigurable electronics, health-monitoring systems, etc. Among various geometric constructions, 3D flexible bioinspired architectures are of particular interest, since they can provide new functions and capabilities, compared to their 2D counterparts. However, 3D electronic device systems usually undergo complicated mechanical loading in practical operation, resulting in complex deformation modes and elusive failure mechanisms. The development of mechanically robust flexible 3D electronics that can undergo extreme compression without irreversible collapse or fracture remains a challenge. Here, inspired by the multilayer mesostructure of Enhydra lutris fur, we introduce the design and assembly of multilayer cage architectures capable of multistage load bearing and collapse prevention under large out-of-plane compression. Combined in situ experiments and mechanical modeling show that the multistage mechanical responses of the developed bionic architectures can be fine-tuned by tailoring the microstructural geometries. The integration of functional layers of gold and piezoelectric polymer allows the development of a flexible multifunctional sensor that can simultaneously achieve the dynamic sensing of compressive forces and temperatures. The demonstrated capabilities and performances of fast response speed, tunable measurement range, excellent flexibility, and reliability suggest potential uses in MEMS, robotics and biointegrated electronics.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bioinspired design and assembly of a multilayer cage-shaped sensor capable of multistage load bearing and collapse prevention

Xu¹,

Liu²,

Jin³

et al. 2021

Nanotechnology

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“…Rolls form the basis for more complex maneuvers, such as banked turns (Schilstra and Hateren, 1999), and are used as building blocks for intricate maneuvering trajectories. Rolling performance affects many functions including reorientation of the visual field (Goldbogen et al, 2013), prey capture and feeding (Fish, 2002;Fish et al, 2007), cleaning (Limbaugh, 1961), social interactions (McBride and Kritzler, 1951) and dislodging parasites Weihs et al, 2007). Baleen whales in the family Balaenopteridae, or rorquals, frequently roll during feeding events (Goldbogen et al, 2006;Kot and Borda, 2014).…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic properties of fin whale flippers predict maximum rolling performance

Segre

Cade

Fish

et al. 2016

Journal of Experimental Biology

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Maneuverability is one of the most important and least understood aspects of animal locomotion. The hydrofoil-like flippers of cetaceans are thought to function as control surfaces that effect maneuvers, but quantitative tests of this hypothesis have been lacking. Here, we constructed a simple hydrodynamic model to predict the longitudinal-axis roll performance of fin whales, and we tested its predictions against kinematic data recorded by on-board movement sensors from 27 free-swimming fin whales. We found that for a given swimming speed and roll excursion, the roll velocity of fin whales calculated from our field data agrees well with that predicted by our hydrodynamic model. Although fluke and body torsion may further influence performance, our results indicate that lift generated by the flippers is sufficient to drive most of the longitudinal-axis rolls used by fin whales for feeding and maneuvering.

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Radio Telemetric Determination of the 24-Hour Feeding Activities of Sea Otters, Enhydra lutris

Loughlin

1980

A Handbook on Biotelemetry and Radio Tracking

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Observations on the California Sea Otter

Cited by 7 publications

References 0 publications

Bioinspired design and assembly of a multilayer cage-shaped sensor capable of multistage load bearing and collapse prevention

Bioinspired design and assembly of a multilayer cage-shaped sensor capable of multistage load bearing and collapse prevention

Hydrodynamic properties of fin whale flippers predict maximum rolling performance

Radio Telemetric Determination of the 24-Hour Feeding Activities of Sea Otters, Enhydra lutris

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