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Publications

These publications showcase the significant science conducted in our Science Centers.

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Plate deformation at depth under northern California: Slab gap or stretched slab? Plate deformation at depth under northern California: Slab gap or stretched slab?

Plate kinematic interpretations for northern California predict a gap in the underlying subducted slab caused by the northward migration of the Pacific-North America-Juan de Fuca triple junction. However, large-scale decompression melting and asthenospheric upwelling to the base of the overlying plate within the postulated gap are not supported by geophysical and geochemical observations...
Authors
Uri S. ten Brink, N. Shimizu, P.C. Molzer

Channel catfish response to ultraviolet-B radiation Channel catfish response to ultraviolet-B radiation

Fingerling channel catfish Ictalurus punctatus exposed to simulated ultraviolet-B radiation at an average daily dose of 2.9 J/cm2 were quite sensitive to the radiation. After a 24-h exposure, thinning of the most dorsal epidermis frequently was accompanied by edema. Compared with epidermis of unexposed fish, mucous cells in exposed fish were less superficial and club cells were less...
Authors
M. S. Ewing, V. S. Blazer, D. L. Fabacher, E. E. Little, K. M. Kocan

Sperm-cell ultrastructure of North American sturgeons II: The shortnose sturgeon (Acipenser brevirostrum, Lesueur, 1818) Sperm-cell ultrastructure of North American sturgeons II: The shortnose sturgeon (Acipenser brevirostrum, Lesueur, 1818)

The fine structure of the sperm cell of the shortnose sturgeon (Acipenser brevirostrum) was examined using transmission electron microscopy and selected metrics. The cell possesses a distinct acrosome, a defined head region, a midpiece, and a single flagellum. The mean length of the sperm cell body (acrosome + nucleus + midpiece) is approximately 9.71 µm, and the length of the flagellum...
Authors
M. N. DiLauro, W.S. Kaboord, R.A. Walsch

Changes in haematology during upstream migration to American shad Changes in haematology during upstream migration to American shad

Heart mass of American shad Alosa sapidissima did not change during migration in the Connecticut River. Spleen mass decreased and there was an increase in available blood haemoglobin (+22%) and haematocrit (+9%). The decreases in spleen somatic index (-29%) and spleen haemoglobin content (-15%) were dependent upon distance travelled upriver and not seasonal migration timing or short-term...
Authors
J. B. K. Leonard, S. D. McCormick
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