Groothuis, Ton

Maan, Martine

Mameri, Daniel

Seehausen, O

van Kammen, Corina

English

ARTS repository - University of Groningen

   University of GroningenVisual adaptation and microhabitat choice in two closely related cichlid species from LakeVictoriaMameri, Daniel; van Kammen, Corina; Groothuis, Ton; Seehausen, O; Maan, MartineIMPORTANT NOTE: You are advised to consult the publisher's version (publisher's PDF) if you wish to cite fromit. Please check the document version below.Publication date:2017Link to publication in University of Groningen/UMCG research databaseCitation for published version (APA):Mameri, D., van Kammen, C., Groothuis, T., Seehausen, O., & Maan, M. (2017). Visual adaptation andmicrohabitat choice in two closely related cichlid species from Lake Victoria. Poster session presented atESEB 2017, Groningen, Netherlands.CopyrightOther than for strictly personal use, it is not permitted to download or to forward/distribute the text or part of it without the consent of theauthor(s) and/or copyright holder(s), unless the work is under an open content license (like Creative Commons).The publication may also be distributed here under the terms of Article 25fa of the Dutch Copyright Act, indicated by the “Taverne” license.More information can be found on the University of Groningen website: https://www.rug.nl/library/open-access/self-archiving-pure/taverne-amendment.Take-down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediatelyand investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons thenumber of authors shown on this cover page is limited to 10 maximum.Download date: 13-02-2023VISUAL ADAPTATION AND MICROHABITAT CHOICE IN TWO CLOSELY RELATEDCICHLID SPECIES FROM LAKE VICTORIAD. Mameri 1,3*, C. Van Kammen 2,3, T.G.G. Groothuis 2, O. Seehausen 4, M.E. Maan 2,41 MARE, ISPA –Universitary Institute, Rua Jardim do Tabaco 34, 1149-041 Lisbon, Portugal (*dmameri@outlook.pt)2 Van Hall Larenstein University of Applied Sciences, Agora 1, 8934 AL Leeuwarden, The Netherlands3 University of Groningen, Groningen Institute for Evolutionary Life Sciences, PO Box 11103, 9700 CC Groningen, The Netherlands4 Department of Fish Ecology and Evolution, Centre of Ecology, Evolution and Biogeochemistry, EAWAG Swiss Federal Institute of Aquatic Science and Technology, Seestrasse 79, 6047 Kastanienbaum, Switzerland5 Division of Aquatic Ecology and Evolution, Institute of Ecology and Evolution, University of Bern, Baltzerstrasse 6, 3012 Bern, SwitzerlandModel speciesMaterial and methodsWhen different genotypes choose different habitats to better match their phenotypes, adaptivedifferentiation and reproductive isolation may be promoted. In cichlid fish, visual adaptation to alternativevisual environments is hypothesised to contribute to speciation. Here, we investigated whether variation invisual sensitivity causes variation in visual habitat preference, in the context of the sensory drivehypothesis (Endler 1992, Boughman 2002). We use two closely related cichlid species that occur atdifferent water depths in Lake Victoria, experiencing different light conditions and showing geneticdifferences in visual perception (Pundamilia pundamilia – inhabiting shallow waters; and Pundamilianyererei – found in deeper waters, Seehausen et al 2008; Figure 1). We also explore potential effects ofvisual plasticity, taking advantage of captive fish artificially reared in two different light conditions,mimicking either shallow-water or deep-water light environments.IntroductionFig.1. (A) Pundamilia pundamilia and Pundamilia nyererei (malesand females) from Makobe Island, Tanzania.• Contrary to predictions, P. pundamilia and P. nyererei did not differ in visual habitat preference• The effect of rearing light environment that we observed is consistent with the result of Wright et al. (2017), who found that the same two light regimes affected female matepreference in Pundamilia• While we provided food chemical cues to stimulate exploration, the testing paradigm did not provide an actual reward. This should be addressed in future experiments.• 120 fish tested in groups of 4 (fixed group composition across trials)• 2 species: P. pundamilia (P) and P. nyererei (N); and hybrids (H)• P and N were tested 3 times, and hybrids twice• fish reared in either ‘shallow’ or ‘deep’ light conditions• Food odour cues spread prior to trials, in both sides of the tank• Time spent on each side recorded in 1-hour trials (at group level)Main results and discussionFigure 3. Experimental tank. A PVC sheet divided the tank into two equally-sized compartments. A hole in the dividerallowed the fish to perceive the other light environment and cross from one side to the other. In the photograph, theleft side was set up with the shallow light condition and the right side with the deep light condition.NO DIFFERENCES BETWEEN SPECIESThere was no significant difference in light preference between species (P-N-H; T=1.21, d.f. = 76 , P = 0.23; GLMM model with species, light environment and trialnumber as predictors) – Figure 3.Figure 4. Visual habitat preference for shallowand deep-reared groups in trials 1, 2 and 3;symbols are mean values with standard error barsand sample sizes (number of groups).Figure 3. Visual habitat preference for P. nyererei(N), hybrids (H) and P. pundamilia (P) groups in trials1, 2 and 3; bars are mean values with standard errorbars and sample sizes (number of groups).ReferencesEFFECTS OF THE REARING LIGHT ENVIRONMENTFish spent more time in the light environment they were reared in (T=2.49, df= 76,p=0.015), particularly in the first trial - Figure 4. The interaction effect of rearingenvironment and trial number was marginally significant (T=-1.98, df=38, p=0.051).Boughman JW (2002). How sensory drive can promote speciation. Trends in Ecology & Evolution. 17: 571-577.Endler JA (1992). Signals, signal conditions, and the direction of evolution. The American Naturalist. 139: S125-S153Seehausen 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 (2008). Speciation through sensory drive in cichlid fish. Nature 455: 620-626. Wright DS, Demandt N, Alkema JT, Seehausen O, Groothuis TGG and Maan ME (2017). Developmental effects of visual environment on species-assortative mating preferences in Lake Victoria cichlid fish. Journal of Evolutionary Biology 30: 289–299.

Visual adaptation and microhabitat choice in two closely related cichlid species from Lake Victoria

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Visual adaptation and microhabitat choice in two closely related cichlid species from Lake Victoria

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