Sökning: "fishes"

Visar resultat 6 - 10 av 61 avhandlingar innehållade ordet fishes.

  1. 6. A phylogenetic analysis of rasborin fishes (Teleostei, Cyprinidae)

    Författare :Te-Yu Liao; Sven Kullander; Paul Skelton; Stockholms universitet; []
    Nyckelord :Rasbora; Chedrina; Danionina; Danionini; Rasborini; Danioninae; Opsariichthyinae; Cyprinidae; Cypriniformes; phylogeny; systematics; Africa; Asia; Systematic Zoology; zoologisk systematik och evolutionsforskning;

    Sammanfattning : The Danioninae (sensu lato) were until recently considered to be a paraphyletic group, comprising about 200 species and distributed over Africa and southern and eastern Asia. There was no morphological diagnosis for the Danioninae, and also the composition of the subfamily, and the interrelationships of included genera have been contentious. LÄS MER

  3. 7. Morphology, Taxonomy and Interrelationships of Tristichopterid Fishes (Sarcopterygii, Tetrapodomorpha)

    Författare :Daniel Snitting; Per Erik Ahlberg; Graham Budd; Henning Blom; Zerina Johanson; Uppsala universitet; []
    Nyckelord :Organismic biology; Sarcopterygii; Tetrapodomorpha; Tristichopteridae; biogeography; phylogeny; Computed Tomography; Devonian; Organismbiologi;

    Sammanfattning : Tristichopterids (Sarcopterygii, Tetrapodomorpha) form a monophyletic group of exclusively Devonian fishes. This thesis consists of descriptions of new material of tristichopterids and closely related taxa, as well as new interpretations and descriptions of previously figured material. LÄS MER

  4. 8. Some points in the cranial development of Teleostomian fishes

    Författare :Torsten Pehrson; Stockholms högskola; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : .... LÄS MER

  5. 9. Target organs for androgens in two teleost fishes, Atlantic salmon, Salmo salar, and three-spined stickleback, Gasterosteus aculeatus

    Författare :Staffan Jakobsson; Scott P. Alexander; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; zoologi; Zoology;

    Sammanfattning : The major androgen in male teleost fishes is 11-ketotestosterone (11KT) and not testosterone (T) as in mammals. 11KT has often been found to be more effective than T in stimulating teleost male secondary sexual characters (SSC's). LÄS MER

  7. 10. On the ontogeny of the chondral skull in Characidae, with a discussion on the chondrocranial base and the visceral chondrocranium in fishes

    Författare :Gunnar Bertmar; Stockholms högskola; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER