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Increasing Thiamine Concentrations in Lake Trout Eggs from Lakes Huron and Michigan Coincide with Low Alewife Abundance

Creator:

Riley, Stephen C., Rinchard, Jacques, Honeyfield, Dale C., Evans, Allison N., and Begnoche, Linda

Abstract:

Lake trout Salvelinus namaycush in the Laurentian Great Lakes suffer from thiamine deficiency as a result of adult lake trout consuming prey containing thiaminase, a thiamine-degrading enzyme. Sufficiently low egg thiamine concentrations result in direct mortality of or sublethal effects on newly hatched lake trout fry. To determine the prevalence...

Resource Type:

Article

Full Text:

Huron and Michigan Coincide with Low Alewife Abundance Stephen C. Riley* and Jacques Rinchard1 U.S
Sex determination in Nile tilapia, Oreochromis niloticus: gene expression, masculinization methods, and environmental effects

Creator:

Sánchez, Wilfrido M. Contreras

Abstract:

Sex differentiation in fish is a labile process that allows sex inversion in several species. The inherent capacity of fish germ cells to differentiate into oocytes or spermatocytes constitutes a key factor allowing for functional sex inversion. This thesis set out to determine the mechanism involved in steroid-induced sex differentiation...

Resource Type:

Dissertation