caa a22 4500 38639296X CHVBK 20180307112126.0 cr unu---uuuuu 161130e198908 xx s 000 0 eng 10.1017/S0016672300028317 doi S0016672300028317 pii (NATIONALLICENCE)cambridge-10.1017/S0016672300028317 Differences in allele frequencies of Aat between high- and mid-rocky shore populations of Littorina saxatilis (Olivi) suggest selection in this enzyme locus [Elektronische Daten] Samples of the intertidal prosobranch Littorina saxatilis were collected along vertical transects from high- to mid-store levels at five different geographic locations of western Europe. Electrophoretic screening of ten metabolic enzymes revealed five highly polymorphic loci. Four of these showed no or few significant differences in allele frequencies between high- and mid-shore samples of Littorina saxatilis. The fifth locus, Aat (aspartate aminotransferase, EC 2.6.1.1), showed clinal variation in allele frequencies over the few metres of each transect, suggesting that this locus, or a coupled locus, is under selection with a slow allele (Aat100) favoured in mid-shore habitats and a faster allele (Aat120) selected for in the high littoral fringe. Copyright © Cambridge University Press 1989 Johannesson Kerstin Tjärnö Marine Biological Laboratory, Pl. 2781, S-452 00 Strömstad, Sweden Johannesson Bo Tjärnö Marine Biological Laboratory, Pl. 2781, S-452 00 Strömstad, Sweden Genetical Research Cambridge University Press 54/1(1989-08), 7-12 0016-6723 54:1<7 1989 54 GRH https://doi.org/10.1017/S0016672300028317 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0016672300028317 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Johannesson Kerstin Tjärnö Marine Biological Laboratory, Pl. 2781, S-452 00 Strömstad, Sweden NATIONALLICENCE 700 1- Johannesson Bo Tjärnö Marine Biological Laboratory, Pl. 2781, S-452 00 Strömstad, Sweden NATIONALLICENCE 773 0- Genetical Research Cambridge University Press 54/1(1989-08), 7-12 0016-6723 54:1<7 1989 54 GRH CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge