Results 61 to 70 of about 9,369 (253)

Molecular Palaeontology Prospects From Exceptionally Preserved Eocene Brackish‐Water Bivalve Batissa sitakaraensis (Venerida: Corbiculidae) From Hokkaido, Japan

Geological Journal, EarlyView.
This study reports the exceptional preservation of the Eocene freshwater bivalve Batissa sitakaraensis from Hokkaido, Japan. Multimodal analyses reveal that both the aragonitic shell mineralogy and the delicate organic periostracum retain their original structural and chemical characteristics after millions of years.
Taro Yoshimura, Kazuki Hirota, Hiroyuki Kagi, Takashi Matsubara, Takenori Sasaki   +4 more
wiley   +1 more source

ParaHox Genes Revisited: From Gut Patterning to Integrated Axial and Neural Organization in Rotifera

Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, EarlyView.
In rotifers, ParaHox genes show a dispersed genomic organization, with Xlox absent across gnathiferans. Exclusive neuronal expression of Gsx and Cdx reveals that ancestral ParaHox genes coordinated neural and epithelial development beyond gut patterning, suggesting an integrated role in early bilaterian body plan organization.
Andreas C. Fröbius, David B. Mark Welch, Holger Herlyn   +2 more
wiley   +1 more source

Element concentrations in tissues reveal spatial structure of Atlantic walrus management stocks

The Journal of Wildlife Management, EarlyView.
Differences in tissue element concentrations confirm geographic differentiation between 2 of Canada's walrus management stocks but reveal additional spatial structure within the largest stock that may have management implications. Abstract Ensuring harvested animal populations are managed at appropriate scales requires an understanding of underlying ...
Alexander M. Jardine, Jennifer F. Provencher, Mary Gamberg, Cory J. D. Matthews   +3 more
wiley   +1 more source

Bioaccumulation of bacteriophages T4 and RB43 by freshwater bivalves in sterile aquarium water

RUDN Journal of Ecology and Life Safety
In our study, we investigated the bioaccumulation of T4 and RB43 bacteriophages by the bivalve mollusks U. pictorum and A. cygnea . Additionally, tests were conducted to determine the content of E.
Maria K. Bulavina, Tatiana N. Abashina, Nataliya E. Suzina, Valentina N. Polivtseva, Andrei A. Zimin   +4 more
doaj   +1 more source

Nanoscale assembly processes revealed in the nacroprismatic transition zone of Pinna nobilis mollusc shells

, 2015
Intricate biomineralization processes in molluscs engineer hierarchical structures with meso-, nano-, and atomic architectures that give the final composite material exceptional mechanical strength and optical iridescence on the macroscale.
Estroff, Lara A., Holtz, Megan E., Hovden, Robert, Marin, Frédéric, Muller, David A., Wolf, Stephan E.   +5 more
core   +3 more sources

Comparing non‐staining methods with Mutvei's solution to visualize growth increments in short‐lived intertidal marine gastropod shells

Limnology and Oceanography: Methods, EarlyView.
Abstract Mutvei's solution is a widely utilized standard staining method for revealing growth increments in biogenic carbonates; however, it is a slightly toxic, destructive approach with varying success across species groups. Therefore, there has been growing interest in finding non‐toxic, less destructive, and straightforward alternative techniques ...
Mahsa Alidoostsalimi, Amy L. Prendergast, Sean Ulm, Ariana B. J. Lambrides, Ian J. McNiven, Russell N. Drysdale, Nguurruumungu Indigenous Corporation, Walmbaar Aboriginal Corporation RNTBC   +7 more
wiley   +1 more source

Crystallographic orientation inhomogeneity and crystal splitting in biogenic calcite [PDF]

, 2013
The calcitic prismatic units forming the outer shell of the bivalve Pinctada margaritifera have been analysed using scanning electron microscopy–electron back-scatter diffraction, transmission electron microscopy and atomic force microscopy.
Berent, K., Bonarski, J., Checa, A., Faryna, M., González-Segura, A., Kania, B., Morawiec, A., Pina, C., Pospiech, J., Willinger, M.   +9 more
core   +2 more sources

Marine trophic architecture and hidden ecological connections in the Strait of Magellan: keystone species and ecosystem resilience

Oikos, EarlyView.
Understanding the ecological implications of species coexistence is central to biodiversity studies and to identify environmental and anthropogenic drivers of ecosystem dynamics, where ecological network analysis offers valuable insights. This study examines the complexity, structure, and potential responses to disturbances of the Strait of Magellan's ...
Claudia D. Andrade, Taryn Sepúlveda, Cristóbal Rivera, Cristian Aldea, Tomás I. Marina   +4 more
wiley   +1 more source

Biochemical responses of bivalve mollusk Unio tumidus to the effect of nanoform of zinc oxide depending on the thermal regime

Біологічні студії, 2017
Indigenous bivalve mollusks from the cooling reservoirs of thermoelectric power plants (TPPs) are subjected to constantly elevated temperature and industrial pollution.
L. L. Gnatyshyna, H. I. Falfushynska, V. V. Mykhalska, I. M. Maletska, V. V. Martyniuk, Z. Yu. Kubashok, A. V. Kharchuk, I. V. Soltys, N. Y. Mischuk, I. M. Sokolova, O. B. Stoliar   +10 more
doaj   +1 more source

The History, Present Condition, and Future of the Molluscan Fisheries of North and Central American and Europe: Volume 1, Atlantic and Gulf Coasts [PDF]

, 1997
This three-volume monograph represents the first major attempt in over a century to provide, on regional bases, broad surveys of the history, present condition, and future of the important shellfisheries of North and Central America and Europe.
Burrell, Jr., Victor G., Hobart, Willis L., MacKenzie, Jr., Clyde L., Rosenfield, Aaron   +3 more
core