Development of Tetracapsuloides bryosalmonae (Myxozoa: Malacosporea) in bryozoan hosts (as examined by light microscopy) and quantitation of infective dose to rainbow trout (Oncorhynchus mykiss)

2006 ◽  
Vol 135 (3-4) ◽  
pp. 249-257 ◽  
Author(s):  
Charles McGurk ◽  
David J. Morris ◽  
Niall A. Auchinachie ◽  
Alexandra Adams
Keyword(s):  
Rainbow Trout ◽  
Light Microscopy ◽  
Oncorhynchus Mykiss ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Infective Dose ◽  
Tetracapsuloides Bryosalmonae

Embryology of the teleost (Oncorhynchus mykiss) lens

1994 ◽  
Vol 72 (4) ◽  
pp. 689-701 ◽  
Author(s):  
J. A. West ◽  
J. G. Sivak ◽  
R. D. Moccia
Keyword(s):  
Rainbow Trout ◽  
Embryonic Development ◽  
Light Microscopy ◽  
Oncorhynchus Mykiss ◽  
Anterior Pole ◽  
Lens Development ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Lens Vesicle ◽  
Lens Placode

Embryological studies of the teleost lens have attracted little attention. The morphology of the rainbow trout (Oncorhynchus mykiss) lens during embryonic development was investigated using light microscopy. Results indicate that in general, the embryology of the rainbow trout lens proceeds much like that which has been described for other vertebrates. However, evidence in this study indicates that both layers of the lens placode invaginate, forming a lens pit, contradicting earlier descriptions of lens development in fishes. Furthermore, a hollow lens vesicle does not appear during development, as is typically described for the mammalian lens. Most importantly, the posterior limit of the anterior epithelium is situated well beyond the equator, three-quarters of the distance from the anterior pole of the lens. As a result, the germinative and transitional zones are located more posteriorly than traditionally described. The consequence of these features and their relevance to the shape of the lens are discussed.

Sign in / Sign up

Export Citation Format

Share Document