Comparison of the Morphology, Structures and Mechanical Properties of Teleost Fish Scales Collected from New Zealand

New Zealand rattail fish are of great interest both to biologists who study their phylogenetics and in fisheries. In contrast, their morphological evolution is little studied and poorly understood. Geometric morphometric methods based on scale shape were applied in this study to determine differences among species and genera. Scale shapes were described using seven landmarks, the coordinates of which were subjected to a generalized Procrustes analysis, followed by a principal components analysis. A cross-validated discriminant analysis was applied to assess and compare the size-shape (centroid size plus shape variables) efficacy in the species and the discrimination of the genera. Two main phenetic groups were identified: cluster no. 1 with eight species and cluster no. 2 with six species. Coelorhinchus aspercephalus and Mesovagus antipodum were more separated from the other species in the first cluster. The cross-validated canonical discriminant analysis correctly classified 74% at the genus level, with most misclassifications occurring between Coelorhinchus and Coryphaenoides, whereas the best classified genera were Mesovagus and Trachyrincus. The discrimination of correctly classified species ranged from 41.2 to 100%. The highest correct classification rates were recorded for Coryphaenoides armatus, Coelorhinchus innotabilis, Trachyrincus longirostris and Mesovagus antipodum.

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A geophysical index to map alteration, permeability, and mechanical properties within volcanoes. Application to the soft volcanic rocks from Whakaari/White Island (New Zealand)

Journal of Volcanology and Geothermal Research ◽

10.1016/j.jvolgeores.2020.106945 ◽

2020 ◽

Vol 401 ◽

pp. 106945

Author(s):

André Revil ◽

Antoine Coperey ◽

Michael J. Heap ◽

Lucille Carbillet

Keyword(s):

Mechanical Properties ◽

New Zealand ◽

Volcanic Rocks ◽

White Island

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Teleost fish scales amongst the toughest collagenous materials

Journal of the Mechanical Behavior of Biomedical Materials ◽

10.1016/j.jmbbm.2014.09.025 ◽

2015 ◽

Vol 52 ◽

pp. 95-107 ◽

Cited By ~ 37

Author(s):

A. Khayer Dastjerdi ◽

F. Barthelat

Keyword(s):

Teleost Fish ◽

Fish Scales

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The mechanical properties of polyneuronally innervated, myotomal muscle fibres isolated from a teleost fish (Myoxocephalus scorpius)

Pflügers Archiv - European Journal of Physiology ◽

10.1007/bf00582542 ◽

1988 ◽

Vol 412 (5) ◽

pp. 524-529 ◽

Cited By ~ 21

Author(s):

J. D. Altringham ◽

I. A. Johnston

Keyword(s):

Mechanical Properties ◽

Teleost Fish ◽

Muscle Fibres ◽

Myoxocephalus Scorpius ◽

Myotomal Muscle

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Teleost Fish Scales: A Unique Biological Model for the Fabrication of Materials for Corneal Stroma Regeneration

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2007.503 ◽

2007 ◽

Vol 7 (3) ◽

pp. 757-762 ◽

Cited By ~ 10

Author(s):

Yasuaki Takagi ◽

Kazuhiro Ura

Keyword(s):

Teleost Fish ◽

Corneal Stroma ◽

Biological Model ◽

Fish Scales

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Nonlinear Model for Viscoelastic Behavior of Achilles Tendon

Journal of Biomechanical Engineering ◽

10.1115/1.4002552 ◽

2010 ◽

Vol 132 (11) ◽

Cited By ~ 16

Author(s):

Cyril J.F. Kahn ◽

Xiong Wang ◽

Rachid Rahouadj

Keyword(s):

Experimental Data ◽

Mechanical Properties ◽

New Zealand ◽

Viscoelastic Behavior ◽

Research Literature ◽

Type I ◽

Zealand Rabbit ◽

Wide Range ◽

Representative Element Volume ◽

Mechanisms Of Deformation

Although the mechanical properties of ligament and tendon are well documented in research literature, very few unified mechanical formulations can describe a wide range of different loadings. The aim of this study was to propose a new model, which can describe tendon responses to various solicitations such as cycles of loading, unloading, and reloading or successive relaxations at different strain levels. In this work, experiments with cycles of loading and reloading at increasing strain level and sequences of relaxation were performed on white New Zealand rabbit Achilles tendons. We presented a local formulation of thermodynamic evolution outside equilibrium at a representative element volume scale to describe the tendon’s macroscopic behavior based on the notion of relaxed stress. It was shown that the model corresponds quite well to the experimental data. This work concludes with the complexity of tendons’ mechanical properties due to various microphysical mechanisms of deformation involved in loading such as the recruitment of collagen fibers, the rearrangement of the microstructure (i.e., collagens type I and III, proteoglycans, and water), and the evolution of relaxed stress linked to these mechanisms.

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