Daily variations in the diet of the freshwater oyster Etheria elliptica (Lamarck, 1807) in the Pendjari River (Benin)

Akélé, David Giraud; Agadjihouédé, Hypolithe; Agbohozo, Buenas; Lalèyé, Philippe

doi:10.22271/23940522.2022.v9.i3a.903

Int. J. Fauna Biol. Stud.

2022

DOI: 10.22271/23940522.2022.v9.i3a.903

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Daily variations in the diet of the freshwater oyster Etheria elliptica (Lamarck, 1807) in the Pendjari River (Benin)

David Giraud Akélé¹,

Hypolithe Agadjihouédé²,

Buenas Agbohozo³

et al.

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2024

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Exploring the Mineral Composition, Structure, and Function of a Freshwater Bivalve Adhesive

Metzler,

Zaborowsky,

Nichols

et al. 2024

Adv Materials Inter

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Etheria elliptica is a freshwater oyster that produces an adhesive that hardens underwater, allowing them to attach to other oysters, rocks, wood, and other natural substrates, producing complex oyster bed communities. Despite the importance of the adhesive in oyster bed formation, little is known about its chemical composition, structure, or mechanical properties. Through a combination of scanning electron microscopy (SEM), x‐ray photoemission electron microscopy (X‐PEEM), infrared (IR) spectroscopy, microhardness testing, and nanoindentation, it is found that the oyster adhesive consists entirely of aragonite nanoparticles that clump together into crystallites of varied shape, size, and orientation. The crystallite clumping density varies from the exterior of the adhesive to the interior, with the adhesive closest to the prismatic layer generally being denser. With this variation in density comes a variation in material properties with the exterior adhesive layer being softer and more flexible and the interior adhesive layer being harder and less elastic, or more similar to the prismatic and nacre shell structures produced by the E. elliptica. The resultant material exhibits varied materials properties, despite similar mineral composition.

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Exploring the Mineral Composition, Structure, and Function of a Freshwater Bivalve Adhesive

Metzler,

Zaborowsky,

Nichols

et al. 2024

Adv Materials Inter

View full text Add to dashboard Cite

show abstract

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Daily variations in the diet of the freshwater oyster Etheria elliptica (Lamarck, 1807) in the Pendjari River (Benin)

Cited by 1 publication

References 9 publications

Exploring the Mineral Composition, Structure, and Function of a Freshwater Bivalve Adhesive

Exploring the Mineral Composition, Structure, and Function of a Freshwater Bivalve Adhesive

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