he development of the mesonephros of the pink salmon, Oncorhynchus Gorbuscha (Walbum) ...

• Main Author: Newstead, James Duncan
• Format: Text
• Language: English
• Published: University of British Columbia 2012
• Subjects: Oncorhynchus gorbuscha; Pink salmon
• Online Access: https://dx.doi.org/10.14288/1.0106297; https://doi.library.ubc.ca/10.14288/1.0106297

The development of the kidney of the pink salmon was traced from the earliest stages to the year-old finger-ling. The development of the pronephros has been treated separately. The mesonephros develops from the intermediate cell mass of the twelfth to the thirty-ninth segments. Differentiation of the unsegmented intermediate cell mass closely follows segmentation of the somites. The vascular strand is established beneath the hypochord by migration of cells from the intermediate mesoderm of either side. A solid cylindrical duct rudiment forms as a fold of the dorsolateral aspect of the mass on either side. Mesonephrogenic material separates as a narrow bridge of cells passing from one duct to the other between the cardinal vein and the aorta. Primary mesonephrogenic rudiments appear as condensations of the bridge cells closest to the ducts. Tubule rudiments are formed by elongation of the condensations. The free end of each tubule rudiment dilates to form a thin walled Bowman capsule whose lumen later extends ...