Asymmetric reproductive barriers and mosaic reproductive isolation: insights from<scp>M</scp>isty lake–stream stickleback

Räsänen, Katja; Hendry, Andrew P.

doi:10.1002/ece3.1012

Cited by 18 publications

(27 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Indeed, Atlantic mtDNA haplotypes of sea bass have not been observed to naturally introgress the Western Mediterranean Sea population so far, while the reverse was regularly observed (Coscia et al., 2012; Lemaire et al., 2005; Rondon, 2011). This may represent a case of asymmetric selection against migrants resulting in asymmetric reproductive isolation (Gagnaire, Normandeau, & Bernatchez, 2012; Räsänen & Hendry, 2014). Because of pleiotropy (see above), asymmetric selection could act on early survival and favor sex determination of the individuals ♂ WEM × ♀ NAT cross as males as suggested by Lemaire et al.…”

Section: Discussionmentioning

confidence: 99%

Metapopulation patterns of additive and nonadditive genetic variance in the sea bass (Dicentrarchus labrax)

Guinand

Vandeputte

Dupont‐Nivet³

et al. 2017

Ecology and Evolution

View full text Add to dashboard Cite

Describing and explaining the geographic within‐species variation in phenotypes (“phenogeography”) in the sea over a species distribution range is central to our understanding of a variety of eco‐evolutionary topics. However, phenogeographic studies that have a large potential to investigate adaptive variation are overcome by phylogeographic studies, still mainly focusing on neutral markers. How genotypic and phenotypic data could covary over large geographic scales remains poorly understood in marine species. We crossed 75 noninbred sires (five origins) and 26 dams (two origins; each side of a hybrid zone) in a factorial diallel cross in order to investigate geographic variation for early survival and sex ratio in the metapopulation of the European sea bass (Dicentrarchus labrax), a highly prized marine fish species. Full‐sib families (N = 1,950) were produced and reared in a common environment. Parentage assignment of 7,200 individuals was performed with seven microsatellite markers. Generalized linear models showed significant additive effects for both traits and pleiotropy between traits. A significant nonadditive genetic effect was detected. Different expression of traits and distinct relative performances were found for reciprocal crosses involving populations located on each side of the main hybrid zone located at the Almeria‐Oran front, illustrating asymmetric reproductive isolation. The poor fitness performance observed for the Western Mediterranean population of sea bass is discussed as it represents the main source of seed hatchery production, but also because it potentially illustrates nonadaptive introgression and maladaptation.

show abstract

Section: Discussionmentioning

confidence: 99%

Metapopulation patterns of additive and nonadditive genetic variance in the sea bass (Dicentrarchus labrax)

Guinand

Vandeputte

Dupont‐Nivet³

et al. 2017

Ecology and Evolution

View full text Add to dashboard Cite

show abstract

“…). However, a transplant experiment later indicated that selection against immigrants, together with various other factors, might be contributing to reproductive isolation in this system (Räsänen & Hendry ). Similarly, we cannot rule out that barriers, which we did not detect in our experiment, could contribute to reproductive isolation among lake and stream populations.…”

Section: Discussionmentioning

confidence: 99%

Adaptive divergence between lake and stream populations of anEastAfrican cichlid fish

et al. 2014

View full text Add to dashboard Cite

Divergent natural selection acting in different habitats may build up barriers to gene flow and initiate speciation. This speciation continuum can range from weak or no divergence to strong genetic differentiation between populations. Here, we focus on the early phases of adaptive divergence in the East African cichlid fish Astatotilapia burtoni, which occurs in both Lake Tanganyika (LT) and inflowing rivers. We first assessed the population structure and morphological differences in A. burtoni from southern LT. We then focused on four lake-stream systems and quantified body shape, ecologically relevant traits (gill raker and lower pharyngeal jaw) as well as stomach contents. Our study revealed the presence of several divergent lake-stream populations that rest at different stages of the speciation continuum, but show the same morphological and ecological trajectories along the lake-stream gradient. Lake fish have higher bodies, a more superior mouth position, longer gill rakers and more slender pharyngeal jaws, and they show a plant/algae and zooplankton-biased diet, whereas stream fish feed more on snails, insects and plant seeds. A test for reproductive isolation between closely related lake and stream populations did not detect population-assortative mating. Analyses of F1 offspring reared under common garden conditions indicate that the detected differences in body shape and gill raker length do not constitute pure plastic responses to different environmental conditions, but also have a genetic basis. Taken together, the A. burtoni lake-stream system constitutes a new model to study the factors that enhance and constrain progress towards speciation in cichlid fishes.

show abstract

“…Reciprocal transplant experiments provide so far the strongest evidence for divergent selection by demonstrating that ecotypes or incipient species suffer from reduced fitness in each other's environment (reviewed in Hereford, 2009). Such studies are commonly performed in plants (reviewed in Leimu & Fischer, 2008) and are becoming more and more common in insects and fish that inhabit temperate habitats of the northern hemisphere (e.g., Räsänen & Hendry, 2014;Soria-Carrasco et al, 2014;Gosden, Waller, & Svensson, 2015;Moser, Frey, & Berner, 2016;Soudi, Reinhold, & Engqvist, 2016;Kaufmann, Lenz, Kalbe, Milinski, & Eizaguirre, 2017). Very few such studies have, however, been conducted with animals that inhabit remote areas in the tropical climate (e.g., Thorpe, Reardon, & Malhotra, 2005;Schwartz, Weese, Bentzen, Kinnison, & Hendry, 2010;Bongaerts et al, 2011;Kenkel & Matz, 2016).…”

mentioning

confidence: 99%

Adaptive phenotypic plasticity contributes to divergence between lake and river populations of an East African cichlid fish

Rajkov

Weber

Salzburger

et al. 2018

Ecology and Evolution

View full text Add to dashboard Cite

Adaptive phenotypic plasticity and fixed genotypic differences have long been considered opposing strategies in adaptation. More recently, these mechanisms have been proposed to act complementarily and under certain conditions jointly facilitate evolution, speciation, and even adaptive radiations. Here, we investigate the relative contributions of adaptive phenotypic plasticity vs. local adaptation to fitness, using an emerging model system to study early phases of adaptive divergence, the generalist cichlid fish species Astatotilapia burtoni. We tested direct fitness consequences of morphological divergence between lake and river populations in nature by performing two transplant experiments in Lake Tanganyika. In the first experiment, we used wild‐caught juvenile lake and river individuals, while in the second experiment, we used F1 crosses between lake and river fish bred in a common garden setup. By tracking the survival and growth of translocated individuals in enclosures in the lake over several weeks, we revealed local adaptation evidenced by faster growth of the wild‐caught resident population in the first experiment. On the other hand, we did not find difference in growth between different types of F1 crosses in the second experiment, suggesting a substantial contribution of adaptive phenotypic plasticity to increased immigrant fitness. Our findings highlight the value of formally comparing fitness of wild‐caught and common garden‐reared individuals and emphasize the necessity of considering adaptive phenotypic plasticity in the study of adaptive divergence.

show abstract

Asymmetric reproductive barriers and mosaic reproductive isolation: insights fromMisty lake–stream stickleback

Cited by 18 publications

References 56 publications

Metapopulation patterns of additive and nonadditive genetic variance in the sea bass (Dicentrarchus labrax)

Metapopulation patterns of additive and nonadditive genetic variance in the sea bass (Dicentrarchus labrax)

Adaptive divergence between lake and stream populations of anEastAfrican cichlid fish

Adaptive phenotypic plasticity contributes to divergence between lake and river populations of an East African cichlid fish

Contact Info

Product

Resources

About