1
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Cohen HE, Kane EA. Biting kinematics do not differ between ecologically divergent populations of Trinidadian guppies. J Zool (1987) 2021. [DOI: 10.1111/jzo.12924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- H. E. Cohen
- Department of Biology Georgia Southern University Statesboro GA USA
| | - E. A. Kane
- Department of Biology University of Louisiana at Lafayette Lafayette LA USA
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2
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Exploratory behaviour is associated with microhabitat and evolutionary radiation in Lake Malawi cichlids. Anim Behav 2020. [DOI: 10.1016/j.anbehav.2019.11.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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3
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Smooth, striated, or rough: how substrate textures affect the feeding performance of tadpoles with different oral morphologies. ZOOMORPHOLOGY 2019. [DOI: 10.1007/s00435-019-00469-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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4
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Selz OM, Seehausen O. Interspecific hybridization can generate functional novelty in cichlid fish. Proc Biol Sci 2019; 286:20191621. [PMID: 31640510 DOI: 10.1098/rspb.2019.1621] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
The role of interspecific hybridization in evolution is still being debated. Interspecific hybridization has been suggested to facilitate the evolution of ecological novelty, and hence the invasion of new niches and adaptive radiation when ecological opportunity is present beyond the parental species niches. On the other hand, hybrids between two ecologically divergent species may perform less well than parental species in their respective niches because hybrids would be intermediate in performance in both niches. The evolutionary consequences of hybridization may hence be context-dependent, depending on whether ecological opportunities, beyond those of the parental species, do or do not exist. Surprisingly, these complementary predictions may never have been tested in the same experiment in animals. To do so, we investigate if hybrids between ecologically distinct cichlid species perform less well than the parental species when feeding on food either parent is adapted to, and if the same hybrids perform better than their parents when feeding on food none of the species are adapted to. We generated two first-generation hybrid crosses between species of African cichlids. In feeding efficiency experiments we measured the performance of hybrids and parental species on food types representing both parental species niches and additional 'novel' niches, not used by either of the parental species but by other species in the African cichlid radiations. We found that hybrids can have higher feeding efficiencies on the 'novel' food types but typically have lower efficiencies on parental food types when compared to parental species. This suggests that hybridization can generate functional variation that can be of ecological relevance allowing the access to resources outside of either parental species niche. Hence, we provide support for the hypothesis of ecological context-dependency of the evolutionary impact of interspecific hybridization.
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Affiliation(s)
- O M Selz
- Department of Fish Ecology and Evolution, Center for Ecology, Evolution and Biogeochemistry, EAWAG Swiss Federal Institute of Aquatic Science and Technology, Seestrasse 79, 6047 Kastanienbaum, Switzerland.,Aquatic Ecology and Evolution, Institute of Ecology and Evolution, University of Bern, Baltzerstrasse 6, 3012 Bern, Switzerland
| | - O Seehausen
- Department of Fish Ecology and Evolution, Center for Ecology, Evolution and Biogeochemistry, EAWAG Swiss Federal Institute of Aquatic Science and Technology, Seestrasse 79, 6047 Kastanienbaum, Switzerland.,Aquatic Ecology and Evolution, Institute of Ecology and Evolution, University of Bern, Baltzerstrasse 6, 3012 Bern, Switzerland
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5
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Hulsey CD, Alfaro ME, Zheng J, Meyer A, Holzman R. Pleiotropic jaw morphology links the evolution of mechanical modularity and functional feeding convergence in Lake Malawi cichlids. Proc Biol Sci 2019; 286:20182358. [PMID: 30963830 PMCID: PMC6408893 DOI: 10.1098/rspb.2018.2358] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 02/01/2019] [Indexed: 12/12/2022] Open
Abstract
Complexity in how mechanistic variation translates into ecological novelty could be critical to organismal diversification. For instance, when multiple distinct morphologies can generate the same mechanical or functional phenotype, this could mitigate trade-offs and/or provide alternative ways to meet the same ecological challenge. To investigate how this type of complexity shapes diversity in a classic adaptive radiation, we tested several evolutionary consequences of the anterior jaw four-bar linkage for Lake Malawi cichlid trophic diversification. Using a novel phylogenetic framework, we demonstrated that different mechanical outputs of the same four jaw elements are evolutionarily associated with both jaw protrusion distance and jaw protrusion angle. However, these two functional aspects of jaw protrusion have evolved independently. Additionally, although four-bar morphology showed little evidence for attraction to optima, there was substantial evidence of adaptive peaks for emergent four-bar linkage mechanics and jaw protrusion abilities among Malawi feeding guilds. Finally, we highlighted a clear case of two cichlid species that have -independently evolved to graze algae in less than 2 Myr and have converged on similar jaw protrusion abilities as well as four-bar linkage mechanics, but have evolved these similarities via non-convergent four-bar morphologies.
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Affiliation(s)
- C. Darrin Hulsey
- Department of Biology, Universität Konstanz, Universitätsstraße 10, 78457 Konstanz, Germany
| | - Michael E. Alfaro
- Department of Ecology & Evolutionary Biology, University of California-Los Angeles, 610 Charles E. Young Drive East, Los Angeles, CA 90095-7246, USA
| | - Jimmy Zheng
- Department of Ecology & Evolutionary Biology, University of California-Los Angeles, 610 Charles E. Young Drive East, Los Angeles, CA 90095-7246, USA
| | - Axel Meyer
- Department of Biology, Universität Konstanz, Universitätsstraße 10, 78457 Konstanz, Germany
| | - Roi Holzman
- Department of Zoology, Tel Aviv University and the Inter-University Institute for Marine Sciences, PO Box 469, Eilat 88103, Israel
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6
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Annibale FS, de Sousa VTT, de Sousa CE, Venesky MD, Rossa-Feres DDC, Nomura F, Wassersug RJ. Influence of substrate orientation on tadpoles' feeding efficiency. Biol Open 2019; 8:bio.037598. [PMID: 30578249 PMCID: PMC6361219 DOI: 10.1242/bio.037598] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In nature, tadpoles encounter food on substrates oriented at different angles (e.g. vertically along stems, horizontally on the bottom of the pond). We manipulated the orientation of food-covered surfaces to test how different orientations of surfaces affect tadpoles' feeding efficiency. We studied taxa that differed in the oral morphology of their larvae and position in the water column. We hypothesized that species would differ in their ability to graze upon surfaces at different orientations and that differences in the tadpoles' feeding ability would result in different growth rates. The orientation of food-covered surfaces did not affect the growth rate of bottom-dwelling tadpoles (whose growth rate varied only between species). Among midwater tadpoles, some species appear to have a generalist strategy and experienced a high relative growth rate on numerous substrate orientations, whereas others achieved high growth rates only on flat substrates (i.e. at 0° and 180°). We conclude that oral morphology constrains tadpoles' ability to feed at different substrate orientations, and this could lead to niche partitioning in structurally complex aquatic environments. Because physical parameters of the environment can affect tadpoles' growth rate, characterizing these features might help us better understand how competition structures tadpole assemblages.
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Affiliation(s)
| | | | - Carlos Eduardo de Sousa
- Departamento de Zoologia e Botânica, Universidade Estadual Paulista "Júlio de Mesquita Filho", São José do Rio Preto, SP, 15054-000, Brazil
| | | | - Denise de Cerqueira Rossa-Feres
- Departamento de Zoologia e Botânica, Universidade Estadual Paulista "Júlio de Mesquita Filho", São José do Rio Preto, SP, 15054-000, Brazil
| | - Fausto Nomura
- Departamento de Ecologia, Universidade Federal de Goiás, Goiânia, GO, 74690-900, Brazil
| | - Richard J Wassersug
- Department of Cellular & Physiological Sciences, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada
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7
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Hulsey CD, Holzman R, Meyer A. Dissecting a potential spandrel of adaptive radiation: Body depth and pectoral fin ecomorphology coevolve in Lake Malawi cichlid fishes. Ecol Evol 2018; 8:11945-11953. [PMID: 30598789 PMCID: PMC6303698 DOI: 10.1002/ece3.4651] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Revised: 09/22/2018] [Accepted: 10/01/2018] [Indexed: 01/11/2023] Open
Abstract
The evolution of body shape reflects both the ecological factors structuring organismal diversity as well as an organism's underlying anatomy. For instance, body depth in fishes is thought to determine their susceptibility to predators, attractiveness to mates, as well as swimming performance. However, the internal anatomy influencing diversification of body depth has not been extensively examined, and changes in body depth could arise as a by-product of functional changes in other anatomical structures. Using an improved phylogenetic hypothesis for a diverse set of Lake Malawi cichlid fishes, we tested the evolutionary association between body depth and the height of the pectoral girdle. To refine the functional importance of the observed substantial correlation, we also tested the coevolution of pectoral girdle height and pectoral fin area. The extensive coevolution of these traits suggests body depth in fishes like the Lake Malawi cichlids could diverge simply as a by-product of being tightly linked to ecomorphological divergence in other functional morphological structures like the pectoral fins.
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Affiliation(s)
| | - Roi Holzman
- School of Zoology, Faculty of Life scienceTel Aviv University, Tel Aviv, Israel and The Inter‐University Institute for Marine SciencesEilatIsrael
| | - Axel Meyer
- Department of BiologyUniversity of KonstanzKonstanzGermany
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8
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Pauers MJ, Fox KR, Hall RA, Patel K. Selection, hybridization, and the evolution of morphology in the Lake Malaŵi endemic cichlids of the genus Labeotropheus. Sci Rep 2018; 8:15842. [PMID: 30367138 PMCID: PMC6203788 DOI: 10.1038/s41598-018-34135-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 10/11/2018] [Indexed: 01/13/2023] Open
Abstract
The cichlid fishes of Lake Malaŵi are the paramount example of adaptive radiation in vertebrates. Evidence of their astounding diversity is perhaps most visible in their adaptations for obtaining food; the genus Labeotropheus, due to their prominent snouts, are an interesting example of an extreme adaptation for feeding. Two different body types are found in this genus: a deep-bodied form (e.g., L. fuelleborni) found most often in turbulent shallow water; and a slender bodied form (e.g., L. trewavasae) found in structurally-complex deep water habitats. Here we test the hypothesis that L. trewavasae should suffer a loss in fitness, measured as growth rate, if raised in turbulence; additionally, we examined growth and morphology of L. fuelleborni and L. fuelleborni x L. trewavasae hybrids under these conditions. We did find the predicted loss of fitness in turbulent-raised L. trewavasae, but found no loss of fitness for L. fuelleborni in either condition; hybrids, due to an unusual morphology, performed better in turbulent as opposed to control conditions. Fitness in turbulent conditions was dependent upon morphology, with deeper bodies and upturned neurocrania allowing a greater growth rate under these conditions. Directional selection on morphology was crucial in the evolution of morphology in the Labeotropheus.
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Affiliation(s)
- Michael J Pauers
- Section of Vertebrate Zoology, Milwaukee Public Museum, 800 W. Wells Street, Milwaukee, Wisconsin, 53233, USA. .,Department of Biological Sciences, University of Wisconsin-Milwaukee at Waukesha, 1500 N. University Drive, Waukesha, Wisconsin, 53188, USA. .,School of Freshwater Sciences, University of Wisconsin-Milwaukee, 600 E. Greenfield Avenue, Milwaukee, Wisconsin, 53204, USA.
| | - Kelsey R Fox
- Section of Vertebrate Zoology, Milwaukee Public Museum, 800 W. Wells Street, Milwaukee, Wisconsin, 53233, USA
| | - Robert A Hall
- Department of Biological Sciences, University of Wisconsin-Milwaukee at Waukesha, 1500 N. University Drive, Waukesha, Wisconsin, 53188, USA.,University of Wisconsin-Madison, Madison, WI, 53708, USA
| | - Kesha Patel
- Department of Biological Sciences, University of Wisconsin-Milwaukee at Waukesha, 1500 N. University Drive, Waukesha, Wisconsin, 53188, USA
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9
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Martinez CM, McGee MD, Borstein SR, Wainwright PC. Feeding ecology underlies the evolution of cichlid jaw mobility. Evolution 2018; 72:1645-1655. [PMID: 29920668 DOI: 10.1111/evo.13518] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 05/11/2018] [Accepted: 05/21/2018] [Indexed: 12/25/2022]
Abstract
The fish feeding apparatus is among the most diverse functional systems in vertebrates. While morphological and mechanical variations of feeding systems are well studied, we know far less about the diversity of the motions that they produce. We explored patterns of feeding movements in African cichlids from Lakes Malawi and Tanganyika, asking whether the degree of kinesis is associated with dietary habits of species. We used geometric morphometrics to measure feeding kinesis as trajectories of shape change, based on 326 high-speed videos in 56 species. Cranial morphology was significantly related to feeding movements, both of which were distributed along a dietary axis associated with prey evasiveness. Small-mouthed cichlids that feed by scraping algae and detritus from rocks had low kinesis strikes, while large-mouthed species that eat large, evasive prey (fishes and shrimps) generated the greatest kinesis. Despite having higher overall kinesis, comparisons of trajectory shape (linearity) revealed that cichlids that eat mobile prey also displayed more kinematically conserved, or efficient, feeding motions. Our work indicates that prey evasiveness is strongly related to the evolution of cichlid jaw mobility, suggesting that this same relationship may explain the origins and diversity of highly kinetic jaws that characterize the super-radiation of spiny-rayed fishes.
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Affiliation(s)
| | - Matthew D McGee
- School of Biological Sciences, Monash University, 3800 Victoria, Australia
| | - Samuel R Borstein
- Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, Tennessee 37996
| | - Peter C Wainwright
- Department of Evolution and Ecology, University of California, Davis, California 95616
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10
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Heiss E, Aerts P, Van Wassenbergh S. Aquatic-terrestrial transitions of feeding systems in vertebrates: a mechanical perspective. ACTA ACUST UNITED AC 2018; 221:221/8/jeb154427. [PMID: 29695537 DOI: 10.1242/jeb.154427] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Transitions to terrestrial environments confront ancestrally aquatic animals with several mechanical and physiological problems owing to the different physical properties of water and air. As aquatic feeders generally make use of flows of water relative to the head to capture, transport and swallow food, it follows that morphological and behavioral changes were inevitably needed for the aquatic animals to successfully perform these functions on land. Here, we summarize the mechanical requirements of successful aquatic-to-terrestrial transitions in food capture, transport and swallowing by vertebrates and review how different taxa managed to fulfill these requirements. Amphibious ray-finned fishes show a variety of strategies to stably lift the anterior trunk, as well as to grab ground-based food with their jaws. However, they still need to return to the water for the intra-oral transport and swallowing process. Using the same mechanical perspective, the potential capabilities of some of the earliest tetrapods to perform terrestrial feeding are evaluated. Within tetrapods, the appearance of a mobile neck and a muscular and movable tongue can safely be regarded as key factors in the colonization of land away from amphibious habitats. Comparative studies on taxa including salamanders, which change from aquatic feeders as larvae to terrestrial feeders as adults, illustrate remodeling patterns in the hyobranchial system that can be linked to its drastic change in function during feeding. Yet, the precise evolutionary history in form and function of the hyolingual system leading to the origin(s) of a muscular and adhesive tongue remains unknown.
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Affiliation(s)
- Egon Heiss
- Institute of Zoology and Evolutionary Research, Friedrich-Schiller-University Jena, Erbertstr. 1, 07743, Jena, Germany
| | - Peter Aerts
- Department of Biology, University of Antwerp, Universiteitsplein 1, B-2610, Antwerp, Belgium.,Department of Movement and Sports Sciences, Ghent University, Watersportlaan 2, B-9000, Ghent, Belgium
| | - Sam Van Wassenbergh
- Department of Biology, University of Antwerp, Universiteitsplein 1, B-2610, Antwerp, Belgium.,Département Adaptations du Vivant, Muséum National d' Histoire Naturelle, 57 rue Cuvier, Case postale 55, 75231, Paris Cedex 5, France
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11
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The Integrated Genomic Architecture and Evolution of Dental Divergence in East African Cichlid Fishes ( Haplochromis chilotes x H. nyererei). G3-GENES GENOMES GENETICS 2017; 7:3195-3202. [PMID: 28751505 PMCID: PMC5592944 DOI: 10.1534/g3.117.300083] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The independent evolution of the two toothed jaws of cichlid fishes is thought to have promoted their unparalleled ecological divergence and species richness. However, dental divergence in cichlids could exhibit substantial genetic covariance and this could dictate how traits like tooth numbers evolve in different African Lakes and on their two jaws. To test this hypothesis, we used a hybrid mapping cross of two trophically divergent Lake Victoria species (Haplochromis chilotes × Haplochromis nyererei) to examine genomic regions associated with cichlid tooth diversity. Surprisingly, a similar genomic region was found to be associated with oral jaw tooth numbers in cichlids from both Lake Malawi and Lake Victoria. Likewise, this same genomic location was associated with variation in pharyngeal jaw tooth numbers. Similar relationships between tooth numbers on the two jaws in both our Victoria hybrid population and across the phylogenetic diversity of Malawi cichlids additionally suggests that tooth numbers on the two jaws of haplochromine cichlids might generally coevolve owing to shared genetic underpinnings. Integrated, rather than independent, genomic architectures could be key to the incomparable evolutionary divergence and convergence in cichlid tooth numbers.
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Hulsey CD, Zheng J, Faircloth BC, Meyer A, Alfaro ME. Phylogenomic analysis of Lake Malawi cichlid fishes: Further evidence that the three-stage model of diversification does not fit. Mol Phylogenet Evol 2017; 114:40-48. [DOI: 10.1016/j.ympev.2017.05.027] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 05/14/2017] [Accepted: 05/30/2017] [Indexed: 01/05/2023]
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13
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Kane EA, Higham TE. Complex Systems Are More than the Sum of Their Parts: Using Integration to Understand Performance, Biomechanics, and Diversity. Integr Comp Biol 2015; 55:146-65. [DOI: 10.1093/icb/icv033] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
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