摘要:

Origin and phylogeny of bony fishes.

ISSN:0373-4137    

DOI:10.1080/11250007809440263

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

Mediterranean sea, melting pot of fish faunas.

ISSN:0373-4137    

DOI:10.1080/11250007809440264

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

A survey has been made of the information available about the evolutionary characteristics of the enzyme lactic-dehydrogenase in teleosts. In this superorder the subunits of this enzyme with a characteristic tetramer structure are coded at the level of at least three genetic loci. The activity of these loci and the tetrameric structure lead to multi-molecular forms called isoenzymes.

ISSN:0373-4137    

DOI:10.1080/11250007809440265

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

The application of biochemical methods, such as electrophoresis, to the solution of taxonomic problems and to applied population genetics analysis in Teleost fish is discussed and some results obtained by this technique are briefly reviewed. More at length, the eel problem, the different theories on the life history of the Atlantic eels and the hypothesis of the existence of spawning areas in the Mediterranean sea, are also presented.

ISSN:0373-4137    

DOI:10.1080/11250007809440266

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

Freshwater fish fauna of Italy: factors and tendencies in changing.

ISSN:0373-4137    

DOI:10.1080/11250007809440267

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

New insights in the debate on fish resources management.

ISSN:0373-4137    

DOI:10.1080/11250007809440268

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

Steroid hormone biosynthesis by the gonads of the teleostDicentrarchus labraxwas studiedin vitro. The testicular tissue at maturity metabolized [4-14C] pregnenolone into the following steroids identified through their isopolarity and isomorphism with authentic compounds: progesterone, 11-ketoprogesterone, 17α-hydroxyprogesterone, 21-deoxycortisol, androstenedione, 11β-hydroxyandrostenedione, testosterone, 11β-hydroxytestosterone and 11-ketotestosterone. The lack of 5-ene-3β-hydroxy intermediates and the large excess of 21-deoxycortisol over 11-deoxyandrogens suggest that 11-oxygenated androgens were formed mainly through the following route: pregnenolone → progesterone → 17α-hydroxyprogesterone → 21-deoxycortisol → 11β-hydroxyandrostenedione. The conversion of the latter into the other 11-oxygenated androgens was accomplished maintaining a balance strongly in favor of 11β-hydroxyandrostenedione and 11-ketotestosterone.

ISSN:0373-4137    

DOI:10.1080/11250007809440269

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue

ISSN:0373-4137    

DOI:10.1080/11250007809440262

出版商:Taylor & Francis Group    

年代:1978

数据来源: Taylor