Rapid and coupled phenotypic and genetic divergence in Icelandic Arctic char (Salvelinus alpinus)

被引:171
作者
Gíslason, D
Ferguson, M [1 ]
Skúlason, S
Snorrason, SS
机构
[1] Univ Guelph, Dept Zool, Guelph, ON N1G 2W1, Canada
[2] Holar Coll, IS-551 Hjaltadal, Sauoarkrokur, Iceland
[3] Univ Iceland, Dept Biol, IS-108 Reykjavik, Iceland
关键词
D O I
10.1139/cjfas-56-12-2229
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
Resource polymorphism has been proposed as an important phase of diversification and speciation in vertebrates. Studies of fish in young lakes of the Northern Hemisphere indicate variably advanced cases of adaptive trophic diversification. We have previously proposed a scheme describing this variation in terms of a gradient of resource-based polymorphic traits, emphasizing flexible behaviour in early phases and morphological divergence in more advanced phases. Here, we present data on Arctic char (Salvelinus alpinus) in Icelandic lakes exhibiting a variable degree of phenotypic and genotypic segregation. We show that (i) the morphs are at different levels of phenotypic segregation and reproductive isolation and in one case completely reproductively isolated, (ii) morphs within lakes appear to be of intralacustrine origin, and (iii) the morphological and genetic divergence of morphs is correlated, suggesting a role for trophic adaptation as a driving force in morph segregation.
引用
收藏
页码:2229 / 2234
页数:6
相关论文
共 11 条
[1]  
BERNATCHEZ L, 1990, EVOLUTION, V44, P1263, DOI [10.1111/j.1558-5646.1990.tb05230.x, 10.2307/2409287]
[2]   MITOCHONDRIAL-DNA DIVERSITY AMONG 4 SYMPATRIC MORPHS OF ARCTIC CHARR, SALVELINUS-ALPINUS L, FROM THINGVALLAVATN, ICELAND [J].
DANZMANN, RG ;
FERGUSON, MM ;
SKULASON, S ;
SNORRASON, SS ;
NOAKES, DLG .
JOURNAL OF FISH BIOLOGY, 1991, 39 (05) :649-659
[3]  
Gislason D, 1998, THESIS U GUELPH GUEL
[4]  
Lu GQ, 1999, EVOLUTION, V53, P1491, DOI 10.1111/j.1558-5646.1999.tb05413.x
[5]   AN EMPIRICAL-EVALUATION OF COEFFICIENTS USED IN RESIDUAL AND ALLOMETRIC ADJUSTMENT OF SIZE COVARIATION [J].
REIST, JD .
CANADIAN JOURNAL OF ZOOLOGY, 1986, 64 (06) :1363-1368
[6]  
Schluter D., 1998, Endless Forms: Species and Speciation) { [eds.]
[7]  
SKULASON S, 1999, EVOLUTION BIOL DIVER
[8]  
SNORRASON SS, 1994, BIOL J LINN SOC, V52, P1
[9]  
Takezaki N, 1996, GENETICS, V144, P389
[10]  
TAYLOR EB, 1993, EVOLUTION, V47, P813, DOI 10.1111/j.1558-5646.1993.tb01236.x