The Experts below are selected from a list of 4722 Experts worldwide ranked by ideXlab platform
Dianchang Zhang - One of the best experts on this subject based on the ideXlab platform.
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The complete mitochondrial genome of Cheilinus oxycephalus (Perciformes: Labridae)
Mitochondrial DNA. Part B Resources, 2019Co-Authors: Liang Guo, Nan Zhang, Ke-cheng Zhu, Huayang Guo, Bao-suo Liu, Dianchang ZhangAbstract:Cheilinus oxycephalus is a marine fish species, belonging to the family Labridae and naturally distributed in Indo-Pacific waters. We obtained the first complete mitochondrial genome of this specie...
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characterization of complete mitochondrial genome of fives tripe wrasse thalassoma quinquevittatum lay bennett 1839 and phylogenetic analysis
Gene, 2017Co-Authors: Na Wu, Nan Zhang, Shigui Jiang, Dianchang ZhangAbstract:Abstract To further supplement the genome-level features in related species, T. quinquevittatum complete mtDNA was firstly sequenced and de novo assembled by next-generation sequencing. The full-length mtDNA of T. quinquevittatum was a 16,896 bp fragment, which was atypical of Labridae, with 2 ribosomal RNA (rRNA) genes, 13 protein-coding genes (PCGs), 23 transfer RNA (tRNA) genes, and a major non-coding control region (D-loop region). Additionally, the mtDNA of T. quinquevittatum exhibited characteristics of A (27.1%), T (29.3%), G (17.8%), and C (25.8%) with a high A + T content (56.4%). Furthermore, the analysis of the average Ka/Ks in the 13 PCGs of three Labridae species indicated a strong purifying selection within this group. Additionally, the phylogenetic analysis based on 13 concatenated PCGs nucleotide and amino acid datasets, showed high value support for the following sister clade among the four genera (T. quinquevittatum, Halichoeres trimaculatus, Halichoeres melanurus, Parajulis poecilepterus). The complete mtDNA of the T. quinquevittatum provided important information for the study in population genetics and evolutionary theory.
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Characterization of complete mitochondrial genome of fives tripe wrasse (Thalassoma quinquevittatum, Lay & Bennett, 1839) and phylogenetic analysis
Gene, 2016Co-Authors: Na Wu, Nan Zhang, Shigui Jiang, Dianchang ZhangAbstract:Abstract To further supplement the genome-level features in related species, T. quinquevittatum complete mtDNA was firstly sequenced and de novo assembled by next-generation sequencing. The full-length mtDNA of T. quinquevittatum was a 16,896 bp fragment, which was atypical of Labridae, with 2 ribosomal RNA (rRNA) genes, 13 protein-coding genes (PCGs), 23 transfer RNA (tRNA) genes, and a major non-coding control region (D-loop region). Additionally, the mtDNA of T. quinquevittatum exhibited characteristics of A (27.1%), T (29.3%), G (17.8%), and C (25.8%) with a high A + T content (56.4%). Furthermore, the analysis of the average Ka/Ks in the 13 PCGs of three Labridae species indicated a strong purifying selection within this group. Additionally, the phylogenetic analysis based on 13 concatenated PCGs nucleotide and amino acid datasets, showed high value support for the following sister clade among the four genera (T. quinquevittatum, Halichoeres trimaculatus, Halichoeres melanurus, Parajulis poecilepterus). The complete mtDNA of the T. quinquevittatum provided important information for the study in population genetics and evolutionary theory.
David R Bellwood - One of the best experts on this subject based on the ideXlab platform.
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Historical and contemporary determinants of global phylogenetic structure in tropical reef fish faunas
Ecography, 2016Co-Authors: Fabien Leprieur, David R Bellwood, Simona Colosio, Patrice Descombes, Valeriano Parravicini, Michel Kulbicki, Peter F. Cowman, David Mouillot, Loïc PellissierAbstract:Identifying the main determinants of tropical marine biodiversity is essential for devising appropriate conservation measures mitigating the ongoing degradation of coral reef habitats. Based on a gridded distribution database and phylogenetic information, we compared the phylogenetic structure of assemblages for three tropical reef fish families (Labridae: wrasses, Pomacentridae: damselfishes and Chaetodontidae: butterflyfishes) using the net relatedness (NRI) and nearest taxon (NTI) indices. We then related these indices to contemporary and historical environmental conditions of coral reefs using spatial regression analyses. Higher levels of phylogenetic clustering were found for fish assemblages in the Indo‐Australian Archipelago (IAA), and more particularly when considering the NTI index. The phylogenetic structure of the Pomacentridae, and to a lower extent of the Chaeotodontidae and Labridae, was primarily associated with the location of refugia during the Quaternary period. Phylogenetic clustering in the IAA may partly result from vicariance events associated with coral reef fragmentation during the glacial periods of the Quaternary. Variation in the patterns among fish families further suggest that dispersal abilities may have interacted with past habitat availability in shaping the phylogenetic structure of tropical reef fish assemblages.
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local phylogenetic divergence and global evolutionary convergence of skull function in reef fishes of the family Labridae
Proceedings of The Royal Society B: Biological Sciences, 2005Co-Authors: Mark W. Westneat, Jennifer L Fessler, Justin R. Grubich, Kendall David Clements, Michael E Alfaro, David R Bellwood, Peter C. Wainwright, Lydia L SmithAbstract:The Labridae is one of the most structurally and functionally diversified fish families on coral and rocky reefs around the world, providing a compelling system for examination of evolutionary patterns of functional change. Labrid fishes have evolved a diverse array of skull forms for feeding on prey ranging from molluscs, crustaceans, plankton, detritus, algae, coral and other fishes. The species richness and diversity of feeding ecology in the Labridae make this group a marine analogue to the cichlid fishes. Despite the importance of labrids to coastal reef ecology, we lack evolutionary analysis of feeding biomechanics among labrids. Here, we combine a molecular phylogeny of the Labridae with the biomechanics of skull function to reveal a broad pattern of repeated convergence in labrid feeding systems. Mechanically fast jaw systems have evolved independently at least 14 times from ancestors with forceful jaws. A repeated phylogenetic pattern of functional divergence in local regions of the labrid tree produces an emergent family-wide pattern of global convergence in jaw function. Divergence of close relatives, convergence among higher clades and several unusual ‘breakthroughs’ in skull function characterize the evolution of functional complexity in one of the most diverse groups of reef fishes.
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Trigonodon oweni and Asima jugleri are different parts of the same species Trigonodon jugleri, a Chiseltooth Wrasse for the Lower and Middle Miocene in Central Europe (Osteichthyes, Labridae, Trigonodontinae)
2004Co-Authors: Ortwin Schultz, David R BellwoodAbstract:The fossil oral jaw teeth traditionally known as Trigonodon oweni and the pharyngeal tooth plates known since SCHULTZ 1978 as Asima jugleri, but before described as Radamas jugleri, Taurinichthys Sacheri and Stylodus Lebescontei, are all parts of the same fossil fish, and bear a close similarity to the Recent Chiseltooth Wrasse Pseudodax moluccanus. The fossil fish and P. moluccanus share a number of unique derived characters. The fossil representative is therefore placed in the Trigonodontinae (syn.: Pseudodacinae), Labridae. According to the ICZN rules the fossil fish has to be designated as Trigonodon jugleri (MUNSTER, 1846). The oldest fossils of this species are from the Early Miocene of Italy and Austria. Most specimens were obtained from the Badenian, Middle Miocene, of the Vienna Basin within the Central Paratethys.
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Mechanisms of benthic prey capture in wrasses (Labridae)
Marine Biology, 2002Co-Authors: L. A. Ferry-graham, Mark W. Westneat, P. C. Wainwright, David R BellwoodAbstract:Teleost fishes capture prey using ram, suction, and biting behaviors. The relative use of these behaviors in feeding on midwater prey is well studied, but few attempts have been made to determine how benthic prey are captured. This issue was addressed in the wrasses (Labridae), a trophically diverse lineage of marine reef fishes that feed extensively on prey that take refuge in the benthos. Most species possess strong jaws with stout conical teeth that appear well-suited to gripping prey. Mechanisms of prey capture were evaluated in five species encompassing a diversity of feeding ecologies: Choerodon anchorago (Bloch, 1791), Coris gaimard (Quoy and Gaimard, 1824), Hologymnosus doliatus (Lacepède, 1801), Novaculichthys taeniourus (Lacepède, 1801) and Oxycheilinus digrammus (Lacepède, 1801). Prey capture sequences were filmed with high-speed video at the Lizard Island Field Station (14°40′S, 145°28′E) during April and May 1998. Recordings were made of feeding on pieces of prawn suspended in the midwater and similar pieces of prawn held in a clip that was fixed to the substratum. Variation was quantified among species and between prey types for kinematic variables describing the magnitude and timing of jaw, hyoid, and head motion. Species differed in prey capture kinematics with mean values of most variables ranging between two and four-fold among species and angular velocity of the opening jaw differing seven-fold. The kinematics of attached prey feeding could be differentiated from that of midwater captures on the basis of faster angular velocities of the jaws and smaller movements of cranial structures which were of shorter duration. All five species used ram and suction in combination during the capture of midwater prey. Surprisingly, ram and suction also dominated feedings on attached prey, with only one species making greater use of biting than suction to remove attached prey. These data suggest an important role for suction in the capture of benthic prey by wrasses. Trade-offs in skull design associated with suction and biting may be particularly relevant to understanding the evolution of feeding mechanisms in this group.
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Mechanisms of benthic prey capture in wrasses (Labridae)
Marine Biology, 2002Co-Authors: L. A. Ferry-graham, Mark W. Westneat, Peter C. Wainwright, David R BellwoodAbstract:Teleost fishes capture prey using ram, suction, and biting behaviors. The relative use of these behaviors in feeding on midwater prey is well studied, but few attempts have been made to determine how benthic prey are captured. This issue was addressed in the wrasses (Labridae), a trophically diverse lineage of marine reef fishes that feed extensively on prey that take refuge in the benthos. Most species possess strong jaws with stout conical teeth that appear well-suited to gripping prey. Mechanisms of prey capture were evaluated in five species encompassing a diversity of feeding ecologies: Choerodon anchorago (Bloch, 1791), Coris gaimard (Quoy and Gaimard, 1824), Hologymnosus doliatus (Lacepede, 1801), Novaculichthys taeniourus (Lacepede, 1801) and Oxycheilinus digrammus (Lacepede, 1801). Prey capture sequences were filmed with high-speed video at the Lizard Island Field Station (14°40′S, 145°28′E) during April and May 1998. Recordings were made of feeding on pieces of prawn suspended in the midwater and similar pieces of prawn held in a clip that was fixed to the substratum. Variation was quantified among species and between prey types for kinematic variables describing the magnitude and timing of jaw, hyoid, and head motion. Species differed in prey capture kinematics with mean values of most variables ranging between two and four-fold among species and angular velocity of the opening jaw differing seven-fold. The kinematics of attached prey feeding could be differentiated from that of midwater captures on the basis of faster angular velocities of the jaws and smaller movements of cranial structures which were of shorter duration. All five species used ram and suction in combination during the capture of midwater prey. Surprisingly, ram and suction also dominated feedings on attached prey, with only one species making greater use of biting than suction to remove attached prey. These data suggest an important role for suction in the capture of benthic prey by wrasses. Trade-offs in skull design associated with suction and biting may be particularly relevant to understanding the evolution of feeding mechanisms in this group.
Mark W. Westneat - One of the best experts on this subject based on the ideXlab platform.
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Burrowing fishes: Kinematics, morphology and phylogeny of sand‐diving wrasses (Labridae)
Journal of fish biology, 2018Co-Authors: Theresa‐anne M. Tatom‐naecker, Mark W. WestneatAbstract:Burrowing through the substrate is a common behaviour in many organisms, both invertebrate and vertebrate. Sand-diving, a burrowing behaviour in the fish family Labridae, consists of a quick and forceful headfirst plunge into the sediment followed by undulatory axial body movements until the fish is completely concealed beneath the surface. This study determined that sand-diving of the slippery dick wrasse Halichoeres bivittatus is composed of two distinct phases of undulatory axial body movements. In the first phase, body undulations occur at high frequencies and wave speeds and low amplitudes, while in the second phase, frequencies and wave speeds decrease while amplitude increases. Furthermore, this study examined several morphological features of sand-diving labrids, including narrow, elongated bodies and lengthened neural spines that overlap with the dorsal pterygiophores, that may be anatomical traits that contribute to burrowing ability. Finally, ancestral state reconstruction showed that sand-diving occurs exclusively in the upper half of the labrid phylogenetic tree with an evolutionary history indicating that sand-diving may have evolved once and then been lost three to five times or may have evolved independently at least three times in family Labridae.
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burrowing fishes kinematics morphology and phylogeny of sand diving wrasses Labridae
Journal of Fish Biology, 2018Co-Authors: Theresaanne M Tatomnaecker, Mark W. WestneatAbstract:Burrowing through the substrate is a common behaviour in many organisms, both invertebrate and vertebrate. Sand-diving, a burrowing behaviour in the fish family Labridae, consists of a quick and forceful headfirst plunge into the sediment followed by undulatory axial body movements until the fish is completely concealed beneath the surface. This study determined that sand-diving of the slippery dick wrasse Halichoeres bivittatus is composed of two distinct phases of undulatory axial body movements. In the first phase, body undulations occur at high frequencies and wave speeds and low amplitudes, while in the second phase, frequencies and wave speeds decrease while amplitude increases. Furthermore, this study examined several morphological features of sand-diving labrids, including narrow, elongated bodies and lengthened neural spines that overlap with the dorsal pterygiophores, that may be anatomical traits that contribute to burrowing ability. Finally, ancestral state reconstruction showed that sand-diving occurs exclusively in the upper half of the labrid phylogenetic tree with an evolutionary history indicating that sand-diving may have evolved once and then been lost three to five times or may have evolved independently at least three times in family Labridae.
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local phylogenetic divergence and global evolutionary convergence of skull function in reef fishes of the family Labridae
Proceedings of The Royal Society B: Biological Sciences, 2005Co-Authors: Mark W. Westneat, Jennifer L Fessler, Justin R. Grubich, Kendall David Clements, Michael E Alfaro, David R Bellwood, Peter C. Wainwright, Lydia L SmithAbstract:The Labridae is one of the most structurally and functionally diversified fish families on coral and rocky reefs around the world, providing a compelling system for examination of evolutionary patterns of functional change. Labrid fishes have evolved a diverse array of skull forms for feeding on prey ranging from molluscs, crustaceans, plankton, detritus, algae, coral and other fishes. The species richness and diversity of feeding ecology in the Labridae make this group a marine analogue to the cichlid fishes. Despite the importance of labrids to coastal reef ecology, we lack evolutionary analysis of feeding biomechanics among labrids. Here, we combine a molecular phylogeny of the Labridae with the biomechanics of skull function to reveal a broad pattern of repeated convergence in labrid feeding systems. Mechanically fast jaw systems have evolved independently at least 14 times from ancestors with forceful jaws. A repeated phylogenetic pattern of functional divergence in local regions of the labrid tree produces an emergent family-wide pattern of global convergence in jaw function. Divergence of close relatives, convergence among higher clades and several unusual ‘breakthroughs’ in skull function characterize the evolution of functional complexity in one of the most diverse groups of reef fishes.
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Phylogenetic relationships and evolutionary history of the reef fish family Labridae.
Molecular phylogenetics and evolution, 2005Co-Authors: Mark W. Westneat, Michael E AlfaroAbstract:The family Labridae (including scarines and odacines) contains 82 genera and about 600 species of fishes that inhabit coastal and continental shelf waters in tropical and temperate oceans throughout the world. The Labridae (the wrasses) is the fifth largest fish family and second largest marine fish family, and is one of the most morphologically and ecologically diversified families of fishes in size, shape, and color. Labrid phylogeny is a long-standing problem in ichthyology that is part of the larger question of relationships within the suborder Labroidei. A phylogenetic analysis of labrids was conducted to investigate relationships among the six classical tribes of wrasses, the affinities of the wrasses to the parrotfishes (scarines), and the broad phylogenetic structure among labrid genera. Four gene fragments were sequenced from 98 fish species, including 84 labrid fishes and 14 outgroup taxa. Taxa were chosen from all major labrid clades and most major global ocean regions where labrid fishes exist, as well as cichlid, pomacentrid, and embiotocid outgroups. From the mitochondrial genome we sequenced portions of 12S rRNA (1000 bp) and 16S rRNA (585 bp), which were aligned by using a secondary structure model. From the nuclear genome, we sequenced part of the protein-coding genes RAG2 (846 bp) and Tmo4C4 (541 bp). Maximum likelihood, maximum parsimony, and Bayesian analyses on the resulting 2972 bp of DNA sequence produced similar topologies that confirm the monophyly of a family Labridae that includes the parrotfishes and butterfishes and strong support for many previously identified taxonomic subgroups. The tribe Hypsigenyini (hogfishes, tuskfishes) is the sister group to the remaining labrids and includes odacines and the chisel-tooth wrasse Pseudodax moluccanus, a species previously considered close to scarines. Cheilines and scarines are sister-groups, closely related to the temperate Labrini, and pseudocheilines and cheilines are split in all phylogenies. The razorfishes (novaculines) and temperate pseudolabrines form successive sister clades to the large crown group radiation of the Julidini. The cleaner wrasses (Labrichthyini) are nested within this radiation and several julidine genera do not appear to be monophyletic (e.g., Coris and Halichoeres). Invasion of temperate water by this predominantly tropical group has occurred multiple times and the reconstruction of biogeography assuming an Indo-Pacific ancestor results in five different lineages invading the Atlantic/Caribbean region. Functional novelties in the feeding apparatus have allowed labrid fishes to occupy nearly every feeding guild in reef environments, and trophic variation is a central axis of diversification in this family.
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phylogenetic relationships evolution of broodcare behavior and geographic speciation in the wrasse tribe labrini
Journal of Molecular Evolution, 2002Co-Authors: Reinhold Hanel, Mark W. Westneat, Christian SturmbauerAbstract:The family Labridae is a large assemblage of marine fish composed of about 580 species in 82 genera distributed in tropical and temperate marine waters around the world. Several subgroups, currently classified as tribes, have been identified in this large family, yet only a few phylogenetic analyses have been performed on labrid clades. We confirm monophyly of the labrid tribe Labrini and propose a phylogeny of the 23 species of the genera Acantholabrus, Centrolabras, Ctenolabrus, Labrus, Lappanella, Symphodus, Tautoga, and Tautogolabrus occurring in the eastern and western Atlantic and the Mediterranean. We analyzed a 577-bp segment of the mitochondrial 16S rDNA and a 506-bp segment of the mitochondrial control region in 22 species, for a total of up to 1069 bp per species. We used both parsimony and likelihood approaches under a variety of assumptions and models to generate phylogenetic hypotheses. The main features of the molecular phylogeny for the Labrini turned out to be the same for the two algorithms applied. The tree structure is similar to a previous, unpublished morphological phylogeny for a subset of labrine species. Estimated divergence times of the Labrini based on fossils and a molecular clock range from about 15 mya for the deepest splits to less than 1 mya for younger clades. Biogeographic patterns of the Symphodus species group and the genus Labrus are dominated by speciation events driven by the closing and opening of the Mediterranean Sea and periodic glaciation events during the past 1 million years. The Labrini are the only clade in the entire Labridae that exhibit nest-building and broodcare behavior. We use the phylogeny to show that similar broodcare behavior has evolved twice in the labrine fish and discuss scenarios for the evolution of broodcare from the diandric protogynous hermaphroditism found in ancestral labrines and many other wrasses.
Joana Isabel Robalo - One of the best experts on this subject based on the ideXlab platform.
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on the absence of genetic differentiation between morphotypes of the ballan wrasse labrus bergylta Labridae
Marine Biology, 2016Co-Authors: Frederico Almada, Laura Casas, Sara Martins Francisco, David Villegasrios, Fran Saboridorey, Xabier Irigoien, Joana Isabel RobaloAbstract:The ballan wrasse, Labrus bergylta (Labridae), is a protogynous hermaphrodite fish common in the north-eastern Atlantic from Norway to Morocco. It is a commercially important resource for local fisheries and is currently being used as cleaner fish to control sea lice in salmon farms in northern Europe. Two distinct colour patterns have been recently reported in the literature: plain and spotted. These individuals follow strikingly different life history strategies raising the question of whether they represent one or two independent taxonomic units. Analyses of mitochondrial (18S, COI and control region) and nuclear (S7) markers revealed no genetic differences between these morphotypes. Alternative explanations for the origin and persistence of distinct morphotypes are discussed.
Paulo Roberto Antunes De Mello Affonso - One of the best experts on this subject based on the ideXlab platform.
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Chromosomal Evolution and Cytotaxonomy in Wrasses (Perciformes; Labridae).
Journal of Heredity, 2017Co-Authors: Leandro Aragão Da Hora Almeida, Lorena Andrade Nunes, Jamille De Araújo Bitencourt, Wagner Franco Molina, Paulo Roberto Antunes De Mello AffonsoAbstract:The wrasses (family Labridae) represent a suitable model to understand chromosomal evolution and to test the efficacy of cytotaxonomy since they display a remarkable karyotypic variation, rarely reported in marine Perciformes, as well as a high number of species and complex systematics. Therefore, we provided new chromosomal data in 5 labrids from South Atlantic (Doratonotus megalepis, Halichoeres dimidiatus, Halichoeres penrosei, Thalassoma noronhanum, and Xyrichtys novacula) and carried out a detailed comparative analysis of karyotypic data in Labridae using multivariate approaches. Basal diploid values (2n = 48) were observed in most of species studied in the present work but D. megalepis (2n = 46), along with distinct karyotype formulae. Single 18S rDNA sites interspersed with GC-rich heterochromatin were also commonly reported except for both Halichoeres species (2 18S rDNA-bearing pairs), following a species-specific pattern. These data show the high rates of chromosomal evolution in wrasses, ranging from microstructural rearrangements to centric fusions. A revision of chromosomal data in Labridae based on multivariate analysis of 74 taxa allowed inferring karyoevolutionary trends within tribes and genera of wrasses. The dendrogram obtained was in agreement with recent systematic hypotheses. In spite of the independent occurrence of some chromosomal rearrangements, karyoevolutionary trends could be identified within tribes of Labridae. Moreover, the karyotypic features are also suitable as cytotaxonomic markers of wrasses.
