Evolution of feeding specialization in Tanganyikan scale-eating cichlids: a molecular phylogenetic approach

Takahashi, R.; Watanabe, Katsutoshi; Nishida, Mutsumi; Hori, Michio

doi:10.1186/1471-2148-7-195

Cited by 54 publications

(57 citation statements)

References 42 publications

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“…Indeed, our studies based on mantel test confirmed the role of genetic factors in influencing morphology. In addition, links between morphological and genetical differentiation have been reported by Stewart and Albertson (2010), who integrated both genetic and geometric morphometric approaches in studying scale eating cichlids of Lake Tanganyika, which had been reported to show frequency balanced polymorphism in the left-handedness and right-handedness of the mouth, an adaptation previously reported by Takahashi et al (2007). Their morphometric results strongly supported the genetic basis of jaw laterality.…”

Section: Discussionsupporting

confidence: 67%

Morphological variations of wild populations of Nile tilapia (Oreochromis niloticus) living in extreme environmental conditions in the Kenyan Rift-Valley

et al. 2016

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In this study, we use geometric morphometric method to establish morphological differences between natural populations of Nile tilapia from two extreme environmental conditions (high temperature and salinity) in Kenya, and compare them to two populations from regions experiencing less extreme conditions. To determine genetic influence on morphology, we correlated genetic data with morphological data. The study observed significant morphological differences between all studied populations, including three closely related hot spring populations (Bogoria, Chelaba and Turtle Springs), and two populations with similar genetic background inhabiting saline environments in Lake Turkana basin (Turkana and Crocodile Lake populations). In addition, allometric growth patterns of the seven populations differed significantly, demonstrating that developmental changes (plastic or adaptive) operated between these populations. Positive correlation between morphometric and genetic data confirmed the influence of genetic factors on morphology. All observed differences were attributed either to genetic and/or environmental factors, which seemed to play a major role in influencing morphology of wild Nile tilapia populations. We recommend further studies to be carried out under controlled conditions to confirm the role of temperature, pH and salinity in morphological diversification of Nile tilapia.

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Section: Discussionsupporting

confidence: 67%

Morphological variations of wild populations of Nile tilapia (Oreochromis niloticus) living in extreme environmental conditions in the Kenyan Rift-Valley

et al. 2016

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“…More significantly, studies have shown that phylogenetic information can indeed be gleaned from AFLP data (26), and a growing body of literature (e.g., refs. [27][28][29] attests to the ability of AFLP-derived phylogenies to corroborate other sources of data. Finally, it is encouraging that (i) the AFLP phylogenies of H. erato and H. melpomene show such strong geographic coherence, which would not be expected if the data were dominated by homoplasy; and (ii) our results from Structure analyses are largely consistent with those from the phylogenetic analyses of our AFLP data.…”

Section: Discussionmentioning

confidence: 74%

Dissecting comimetic radiations inHeliconiusreveals divergent histories of convergent butterflies

Quek

Counterman

Moura

et al. 2010

Proc. Natl. Acad. Sci. U.S.A.

119

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Mimicry among Heliconius butterflies provides a classic example of coevolution but unresolved relationships among mimetic subspecies have prevented examination of codiversification between species. We present amplified fragment length polymorphism and mtDNA datasets for the major comimetic races of Heliconius erato and H. melpomene. The AFLP data reveal unprecedented resolution, clustering samples by geography and race in both species. Our results show that, although H. erato and H. melpomene co-occur, mimic each other, and exhibit parallel shifts in color pattern, they experienced very different modes of diversification and geographic histories. Our results suggest that H. erato originated on the western side of South America whereas H. melpomene originated in the east. H. erato underwent rapid diversification and expansion with continued gene-flow following diversification, resulting in widely dispersed sister taxa. In contrast, H. melpomene underwent a slower pace of diversification with lower levels of gene flow, producing a stepwise directional expansion from west to east. Our results also suggest that each of the three main wing pattern phenotypes originated and/or was lost multiple times in each species. The rayed pattern is likely to be the ancestral phenotype in H. erato whereas postman or red patch is likely to be ancestral in H. melpomene. Finally, H. cydno and H. himera are monophyletic entities clearly nested within H. melpomene and H. erato, rather than being their respective sister species. Estimates of mtDNA divergence suggest a minimum age of 2.8 and 2.1 My for H. erato and H. melpomene, respectively, placing their origins in the late Pliocene.

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“…We suggest that the lepidophagic activity of this species is related to its rheophilic features, i.e., it involves specialized senses and behavior that have developed in the fast current waters of the embanked Tocantins River. Contrary to the scale-eating specialization among Perissodini cichlids, hypothesized to have arisen in deep water habitats in the African Great Lakes (Takahashi et al, 2007;Koblmüller et al, 2007), the origin of lepidophagy among the characids might have occurred in lotic waters. More comprehensive comparative studies within a phylogenetic framework upon the diet of scale eater characids could probably shed light on the evolution of this specialized feeding habit in the Neotropical region.…”

Section: Discussionmentioning

confidence: 83%

Resource use by the facultative lepidophage Roeboides affinis (Günther, 1868): a comparison of size classes, seasons and environment types related to impoundment

2013

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We report the consumption of scales and other food resources by the facultative lepidophage Roeboides affinis in the upper Tocantins River where it was impounded by the Serra da Mesa Hydroelectric Dam. We compared the diet among size classes, between dry and wet seasons, and between sites with distinct water flow characteristics (lotic vs. lentic) related to the distance from the dam and phase of reservoir development. As transparency and fish abundance increased after impoundment, we expected a higher consumption of scales in lentic sites. Likewise, habitat contraction, higher transparency and decrease in terrestrial resources availability, would promote a higher consumption of scales. Scales were consumed by 92% of individuals and represented 26% of the total volume of resources ingested by R. affinis. Diet composition varied significantly among size classes, with larger individuals consuming more scales and larger items, especially odonatans and ephemeropterans. Scale consumption was not significantly different between dry and wet seasons. Roeboides affinis incorporated some food items into the diet as a response to the impoundment, like other species. Scale consumption was higher in lotic sites, refuting our initial hypothesis, what suggests that the lepidophagous habit is related the rheophilic nature of R. affinis.Caracterizamos o consumo de escamas e outros recursos alimentares por Roeboides affinis, um lepidófago facultativo, no alto rio Tocantins, na região represada pela Usina Hidrelétrica de Serra da Mesa. A dieta foi avaliada em relação a classes de tamanho, estações chuvosa e seca, e entre locais com características distintas de fluxo d'água (lótico vs. lêntico) relacionadas com a distância da barragem e fase de desenvolvimento do reservatório. Com o aumento da abundância de peixes e da transparência da água após o represamento, esperamos um maior consumo de escamas nos locais lênticos. Da mesma forma, na época seca, o habitat menor e mais transparente, além da redução da disponibilidade de itens terrestres, levaria a um maior consumo de escamas. Escamas foram consumidas por 92% dos indivíduos e representaram 26% do volume total de itens ingeridos por R. affinis. A composição da dieta variou significativamente entre classes de tamanho, com indivíduos maiores consumindo mais escamas e itens de maior porte, especialmente odonatas e efemerópteros. Não houve diferença no consumo de escamas entre as estações seca e chuvosa. Roeboides affinis incorporou itens à sua dieta como resposta ao represamento, a exemplo de outras espécies na bacia do alto rio Tocantins. O consumo de escamas foi maior nas localidades lóticas, contrariando a hipótese inicial e sugerindo que o hábito lepidofágico está ligado à natureza reofílica de R. affinis.

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Evolution of feeding specialization in Tanganyikan scale-eating cichlids: a molecular phylogenetic approach

Cited by 54 publications

References 42 publications

Morphological variations of wild populations of Nile tilapia (Oreochromis niloticus) living in extreme environmental conditions in the Kenyan Rift-Valley

Morphological variations of wild populations of Nile tilapia (Oreochromis niloticus) living in extreme environmental conditions in the Kenyan Rift-Valley

Dissecting comimetic radiations inHeliconiusreveals divergent histories of convergent butterflies

Resource use by the facultative lepidophage Roeboides affinis (Günther, 1868): a comparison of size classes, seasons and environment types related to impoundment

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