TY  - JOUR
A1  - Schartl, Manfred
A1  - Erbelding-Denk, Claudia
A1  - Nanda, Indrajit
A1  - Schmid, Michael
A1  - Schröder, Johannes Horst
A1  - Epplen, Jörg T.
T1  - Mating success of subordinate males in a poeciliid fish species, Limia perugiae
N2  - No abstract available.
KW  - Lebendgebärende Zahnkarpfen
KW  - Perugia-Kärpfling
Y1  - 1991
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-86349
ER  - 
TY  - JOUR
A1  - Schlupp, I.
A1  - Parzefall, J.
A1  - Schartl, Manfred
T1  - Male mate choice in mixed bisexual/-unisexual breeding complexes of Poecilia (Teleostei: Poeciliidae)
N2  - The livebearing all-female fish Poecilia formosa reproduces by gynogenesis, a modified form of parthenogenesis. P. formosa forms at least two breeding complexes: in its northern range it exists sympatrically with Poecilia latipinna and in its southern range with Poecilia mexicana. Differences between these complexes and their possible origin are discussed. Embryogenesis is triggered by sperm of males of these closely related sympatric species. Because inheritance is stricdy maternal, from the male point of view energy and time invested are totally lost. In this study we wanted to elucidate whether males are able to distinguish between conspecific and parasitic females. It could be shown that males are able to distinguish females optically, but that this ability was obscured as soon as chemical and/or tactile contact was possible. Furthermore, we found that females in an attractive phase of their sexual cycle are always preferred, regardless of species. This is possibly the mechanism by which parasitic females obtain the matings they need to reproduce.
KW  - Poecilia (Teleostei: Poeciliidae)
Y1  - 1991
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-80309
ER  - 
TY  - CHAP
A1  - Adam, D.
A1  - Schartl, A.
A1  - Andexinger, S.
A1  - Hölter, S.
A1  - Wilde, B.
A1  - Schartl, Manfred
T1  - Genetic factors in tumour formation: The melanoma-inducing gene of Xiphophorus
N2  - No abstract available.
KW  - Humangenetik
KW  - Tumor
KW  - Entstehung
Y1  - 1991
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-86388
ER  - 
TY  - JOUR
A1  - Hannig, Gerhard
A1  - Ottilie, Sabine
A1  - Schartl, Manfred
T1  - Conservation of structure and expression of the c-yes and fyn genes in lower vertebrates
N2  - The src-gene family in mammals and birds consists of 9 closely related protein tyrosine kinases. We have cloned the c-yes and fyn bomologues of the src-family from the teleost fish Xiphophorus helleri. Both genes show a high degree of sequence conservation and exhibit all structural motifs diagnostic for functional src-like protein tyrosine kinases. Sequence comparisons revealed three domains (exon 2, exons 3--6, exons 7-12) which evolve at different rates. Both genes exhibit an identical expression pattern, with preferential expression in neural tissues. No transcripts of c-yes were found in liver wbich is contrary to the situation in higher vertebrales. In malignant melanoma, elevated Ieveis of c-yes andfyn were detected indicating a possible function during secondary steps of tumor progression for src-related tyrosine kinases.
KW  - Konservierung
KW  - Gen
KW  - Niedere Wirbeltiere
Y1  - 1991
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-86723
ER  -