Fine structure of the interplatelet area in the gills of the macrophthalmia stage of the river lamprey, Lampetra fluviatilis (L.)

1976 ◽  
Vol 168 (4) ◽  
pp. 433-443 ◽  
Author(s):  
AlanD. Pickering ◽  
R. Morris
Keyword(s):  
Fine Structure ◽  
Lampetra Fluviatilis ◽  
River Lamprey

Fine structure of egg envelopes and the activation changes of cortical alveoli in the river lamprey, Lampetra fluviatilis

Development ◽  
1968 ◽  
Vol 19 (3) ◽  
pp. 311-318
Author(s):  
Björn A. Afzelius ◽  
Lennart Nicander ◽  
Inger Sjödén
Keyword(s):  
Fine Structure ◽  
Chemical Composition ◽  
Present Knowledge ◽  
Egg Cell ◽  
Lampetra Fluviatilis ◽  
Animal Groups ◽  
Zona Radiata ◽  
Egg Envelope ◽  
River Lamprey ◽  
Egg Envelopes

Most eggs are surrounded by several prominent envelopes which have been given names depending on their origin, structure or chemical composition. As our present knowledge of these envelopes is very fragmentary, the results of attempts to homologize the different layers between different animal groups are still open to debate. The nomenclature in this field is quite confusing. According to Raven (1961) the.egg membranes may be divided into ‘primary egg membranes’, formed in the ovary by the egg cell, ‘secondary egg membranes’ formed in the ovary by the follicle epithelium, and ‘tertiary egg membranes’ formed in the genital ducts after ovulation. The egg envelopes in the river lamprey, as in fish, are supposed to be primary egg membranes, although there is no certainty on this point. At least three distinct layers can be distinguished in the egg envelope of this species. Common to two of them is the presence of radial striations, which justifies the name ‘zona radiata’.

Thermoadaptation Characteristics of European River Lamprey Lampetra fluviatilis Smolts

2019 ◽  
Vol 59 (5) ◽  
pp. 805-809 ◽  
Author(s):  
V. K. Golovanov ◽  
N. S. Nekrutov ◽  
A. O. Zvezdin ◽  
A. K. Smirnov ◽  
I. A. Tsimbalov
Keyword(s):  
Lampetra Fluviatilis ◽  
River Lamprey

The interstitial tissue of the testis of the River lamprey, Lampetra fluviatilis

2009 ◽  
Vol 152 (1) ◽  
pp. 9-18 ◽  
Author(s):  
M. W. Hardisty ◽  
B. Rothwell ◽  
K. Steele
Keyword(s):  
Interstitial Tissue ◽  
Lampetra Fluviatilis ◽  
River Lamprey

The prevalence of Clostridium botulinum in European river lamprey (Lampetra fluviatilis) in Finland

2006 ◽  
Vol 109 (3) ◽  
pp. 234-237 ◽  
Author(s):  
Lauri O. Merivirta ◽  
Miia Lindström ◽  
K. Johanna Björkroth ◽  
Hannu J. Korkeala
Keyword(s):  
Clostridium Botulinum ◽  
Lampetra Fluviatilis ◽  
River Lamprey
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