FAST MOVING FRONTS - 2010
March 2010

Ole Seehausen talks with ScienceWatch.com and answers a few questions about this month's Fast Moving Fronts paper in the field of Environment/Ecology. The author has also sent along images of his work.
	Article: Speciation through sensory drive in cichlid fish Authors: Seehausen, O;Terai, Y;Magalhaes, IS;Carleton, KL;Mrosso, HDJ;Miyagi, R;van der Sluijs, I;Schneider, MV;Maan, ME;Tachida, H;Imai, H;Okada, N Journal: NATURE, 455 (7213): 620-U23 OCT 2 2008 Return to interview

Figures and Descriptions

FIGURE 1:

FIGURE 1 DESCRIPTION:

The male breeding color phenotypes, and the frequencies of alternative alleles at the long wavelength sensitive opsin gene, in sympatric species and population pairs of Pundamilia.

The hatched line separates the P. pundamilia/P. nyererei complex from other species pairs. Left column: blue types, right column: red dorsum and red chest types. From top: representative males of blue and reddish phenotypes in the variable but predominantly blue Pundamilia population from Marumbi Island; representative males of blue and reddish phenotypes in the variable but predominantly blue Pundamilia population from Luanso Island; representative males of the blue and red incipient species from Kissenda Island; representative males of the blue and red incipient species from Python Island; representative males of P. pundamilia and P. nyererei from Makobe Island; representative males of P. pundamilia and P. igneopinnis from Igombe Island; representative males of P. azurea and P. sp. "red head" (red chest type) from Ruti and Zue Island respectively. Numbers in the allele frequency pies are the number of haplotypes sequenced.

 

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FIGURE 2:

FIGURE 2 DESCRIPTION:

Variation in the divergence between blue and red Pundamilia at 5 different islands in Lake Victoria.

All data for the same island are presented in the same column. Significant differences between islands are indicated by asterisks (all tests two-tailed): * = p<0.05, **** = p<0.0001, (*) = p<0.1

A: Depth distributions of male nuptial colour phenotypes. Blue bars = blue, pale yellow bars = intermediate, orange or red bars = red (orange if dominated by class 3, red if dominated by class 4). Significance levels of differences between islands in the divergence between red and blue are reported as p values of G-tests.

B: Frequencies of functional allele groups at the LWS opsin gene by island and male colour (left: blue, right: red males). Numbers report sample sizes of completely sequenced haplotypes. For Marumbi and Luanso Islands, only the haplotypes of those individuals are included that could be assigned to "blueish" and "reddish" phenotypes (24 and 54 haplotypes were sequenced from Marumbi and Luanso respectively). Alleles of the P-group in blue, alleles of the H-group in red, other alleles grey and yellow.

C: Individuals plotted on first and second axes of a Factorial Correspondence Analysis of genetic variance calculated from 11 unlinked microsatellite loci. Colours indicate pooled male nuptial colour classes.

View larger image (close new browser window to return to this page).

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