DOCSLIB.ORG

Ontogeny of Oromandibular Structures in the Algivorous and Federally Threatened Devils River Minnow, Dionda Diaboli, with An

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Ontogeny of Oromandibular Structures in the Algivorous and Federally Threatened Devils River Minnow, Dionda Diaboli, with An ONTOGENY OF OROMANDIBULAR STRUCTURES IN THE ALGIVOROUS AND FEDERALLY THREATENED DEVILS RIVER MINNOW, DIONDA DIABOLI, WITH AN OVERVIEW OF KERATINIZED ORAL SURFACES IN NORTH AMERICAN MINNOWS (TELEOSTEI: CYPRINIDAE) A Thesis by ILIANA MARIE MOCK Submitted to the Office of Graduate and Professional Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Chair of Committee, Kevin W. Conway Committee Members, Delbert M. Gatlin, III Christopher D. Marshall Head of Department, Michael P. Masser May 2017 Major Subject: Wildlife and Fisheries Sciences Copyright 2017 Iliana Marie Mock ABSTRACT Algivory is a widespread phenomenon in aquatic animals that involves the consumption of nutrient poor algae. Algivorous fishes often exhibit several common morphological adaptations to contend with this type of diet, including an elongated alimentary tract and the presence of unicuspid or multicuspid teeth in dentulous fishes to facilitate removal of algae from the substrate. Keratinization of the epithelium covering the mouthparts has been hypothesized to facilitate oral scraping of algae from the substrate in the edentulous algivorous fishes of the family Cyprinidae (carps, minnows, and their relatives). Keratinization of the mouthparts has been well studied in Old World members of the Cyprinidae but remains understudied in the North American (New World) members of this successful group. This study represents the first to investigate the nature and extent of oral keratinization in the New World Members of the Cyprinidae. In the first part of this study, I use a combination of scanning electron microscopy (SEM) and histology to investigate the ontogeny of keratinization on the epithelium covering the jaw bones in Dionda diaboli, a federally threatened algivore that is currently the focus of a USFWS captive propagation program with high levels of mortality. Individuals of D. diaboli ≥9.0 mm SL exhibit a transverse band of keratinized epithelium covering the jaw bones. Histochemical investigation using A-S and H&E staining indicates that keratin is restricted to cells of superficial layer of the transverse band, which exhibit polygonal truncate unculi in individuals of 9.0-25.0 mm SL. In ii larger individuals (≥25.0 mm SL), keratinized cells of the transverse band lack unculi and exhibit a flaky appearance. Expansion of the transverse band on the jaws occurs concurrently with elongation and coiling of the gut, and the addition of algal matter into the diet of hatchery individuals to coincide with the first appearance of a keratinized jaw epithelium could be beneficial to the captive rearing of this threatened species. In the second part of this study, I use SEM and histological techniques to investigate the nature and extent of oral keratinization in 55 species (representing 50 genera) of North American minnows, including members of both the ‘Shiner’ clade and the ‘Western’ clade. A phylogenetic comparative approach was used to investigate the relationship between the structure and length of the gut tract relative to oral keratinization in members of the ‘Western’ and ‘Shiner’ clades. Three general states of keratinized oral epithelia were observed among the species of North American minnow examined, including non-keratinized, keratinized squamous, and unculiferous. A non-keratinized epithelium was observed only in one species (Hybognathus nuchalis). The remaining character states were observed in both algivores and non-algivores, and a positive correlation was detected between gut coiling and keratinized oral epithelium within the ‘Western’ clade but not the ‘Shiner’ clade. No correlation exists between the percent of keratinized oral epithelium covering the surface of the jaws and gut length within the ‘Western’ clade but a negative correlation was detected between these two traits within the ‘Shiner’ clade. The high prevalence of keratinized oral surfaces in non-algivorous fishes suggests that this character may have more complex roles in the life history of many species. iii DEDICATION I dedicate this thesis work to my grandmother, Beverly Goodrum, and my mom, Karen Gonzales, for their continuous love and support throughout this project. iv ACKNOWLEDGEMENTS I would like to thank my advisor, Dr. Kevin Conway, for his support and valuable guidance throughout my graduate research and for helping me become a better writer. I also thank Dr. Delbert Gatlin and Dr. Christopher Marshall for serving as my committee members and Patricia Echo-Hawk for her help with obtaining samples of Dionda diaboli for my study. I also thank Mike Pendleton and Tom Stephens for their patience and help learning specimen coating and SEM at the Microscopy and Imaging Center, Heather Prestridge at the Biodiversity Research and Teaching Collections, and the following museums for access to specimens of North American minnows: Bell Museum of Natural History, Florida Museum of Natural History, Natural History Museum of Los Angeles, New York State Museum, North Carolina Museum of Natural Sciences, Oregon State Museum of Biological Diversity, University of Alabama Ichthyological Collection, and the University of Michigan Museum of Zoology. Thanks also go to my friends and colleagues, Amanda Pinion and Kole Kubicek, for all of their help and for making my time at Texas A&M University unforgettable. v CONTRIBUTORS AND FUNDING SOURCES This work was supervised by a thesis committee consisting of Dr. Kevin W. Conway and Dr. Delbert M. Gatlin of the Department of Wildlife and Fisheries, and Dr. Christopher D. Marshall of the Department of Marine Biology at Texas A&M Galveston. Specimens of Dionda diaboli analyzed for Chapter 1 were collected and preserved by Patricia Echo-Hawk at the U.S. Fish and Wildlife San Marcos Aquatic Resources Center. All other work conducted for the thesis was completed myself under the advisement of Dr. Kevin W. Conway of the Department of Wildlife and Fisheries. This research was funded by Texas A&M Agrilife Research. vi TABLE OF CONTENTS Page ABSTRACT ....................................................................................................................... ii DEDICATION .................................................................................................................. iv ACKNOWLEDGEMENTS ............................................................................................... v CONTRIBUTORS AND FUNDING SOURCES ............................................................. vi TABLE OF CONTENTS ................................................................................................. vii LIST OF FIGURES ............................................................................................................ x LIST OF TABLES ........................................................................................................... xii CHAPTER I INTRODUCTION ........................................................................................ 1 CHAPTER II ONTOGENY OF DIONDA DIABOLI ........................................................ 5 2.1 Introduction ...................................................................................................... 5 2.2 Materials and Methods ..................................................................................... 8 2.2.1 Scanning Electron Microscopy ......................................................... 9 2.2.2 Serial Sectioning ............................................................................... 9 2.2.3 Gross Examination of the Alimentary Canal .................................. 10 2.3 Results ............................................................................................................ 12 2.3.1 7.0 mm SL ....................................................................................... 12 2.3.2 9.0 mm SL ....................................................................................... 14 2.3.3 10.0 mm SL ..................................................................................... 14 2.3.4 15.0 mm SL ..................................................................................... 16 2.3.5 22.0 mm SL ..................................................................................... 18 2.3.6 25.0 mm SL ..................................................................................... 18 2.3.7 Adults .............................................................................................. 19 2.3.8 Gut Elongation in Relation to Oral Keratinization .......................... 21 2.4 Discussion ...................................................................................................... 24 2.4.1 Keratinized Oral Surfaces in Dionda diaboli .................................. 24 2.4.2 Keratinization and Gut Elongation .................................................. 28 vii CHAPTER III NORTH AMERICAN ALGIVORES ...................................................... 31 3.1 Introduction .................................................................................................... 31 3.2 Materials and Methods ................................................................................... 33 3.2.1 Taxon Sampling .............................................................................. 33 3.2.2 Scanning Electron Microscopy ....................................................... 35 3.2.3 Serial Sectioning ............................................................................. 36 3.2.4 Gross Examination of the Alimentary
Load more

Recommended publications
  • Table 7: Species Changing IUCN Red List Status (2018-2019)
    IUCN Red List version 2019-3: Table 7 Last Updated: 10 December 2019 Table 7: Species changing IUCN Red List Status (2018-2019) Published listings of a species' status may change for a variety of reasons (genuine improvement or deterioration in status; new information being available that was not known at the time of the previous assessment; taxonomic changes; corrections to mistakes made in previous assessments, etc. To help Red List users interpret the changes between the Red List updates, a summary of species that have changed category between 2018 (IUCN Red List version 2018-2) and 2019 (IUCN Red List version 2019-3) and the reasons for these changes is provided in the table below. IUCN Red List Categories: EX - Extinct, EW - Extinct in the Wild, CR - Critically Endangered [CR(PE) - Critically Endangered (Possibly Extinct), CR(PEW) - Critically Endangered (Possibly Extinct in the Wild)], EN - Endangered, VU - Vulnerable, LR/cd - Lower Risk/conservation dependent, NT - Near Threatened (includes LR/nt - Lower Risk/near threatened), DD - Data Deficient, LC - Least Concern (includes LR/lc - Lower Risk, least concern). Reasons for change: G - Genuine status change (genuine improvement or deterioration in the species' status); N - Non-genuine status change (i.e., status changes due to new information, improved knowledge of the criteria, incorrect data used previously, taxonomic revision, etc.); E - Previous listing was an Error. IUCN Red List IUCN Red Reason for Red List Scientific name Common name (2018) List (2019) change version Category
    [Show full text]
  • Molecular Systematics of Western North American Cyprinids (Cypriniformes: Cyprinidae)
    Zootaxa 3586: 281–303 (2012) ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ ZOOTAXA Copyright © 2012 · Magnolia Press Article ISSN 1175-5334 (online edition) urn:lsid:zoobank.org:pub:0EFA9728-D4BB-467E-A0E0-0DA89E7E30AD Molecular systematics of western North American cyprinids (Cypriniformes: Cyprinidae) SUSANA SCHÖNHUTH 1, DENNIS K. SHIOZAWA 2, THOMAS E. DOWLING 3 & RICHARD L. MAYDEN 1 1 Department of Biology, Saint Louis University, 3507 Laclede Avenue, St. Louis, MO 63103, USA. E-mail S.S: [email protected] ; E-mail RLM: [email protected] 2 Department of Biology and Curator of Fishes, Monte L. Bean Life Science Museum, Brigham Young University, Provo, UT 84602, USA. E-mail: [email protected] 3 School of Life Sciences, Arizona State University, Tempe, AZ 85287-4501, USA. E-mail: [email protected] Abstract The phylogenetic or evolutionary relationships of species of Cypriniformes, as well as their classification, is in a era of flux. For the first time ever, the Order, and constituent Families are being examined for relationships within a phylogenetic context. Relevant findings as to sister-group relationships are largely being inferred from analyses of both mitochondrial and nuclear DNA sequences. Like the vast majority of Cypriniformes, due to an overall lack of any phylogenetic investigation of these fishes since Hennig’s transformation of the discipline, changes in hypotheses of relationships and a natural classification of the species should not be of surprise to anyone. Basically, for most taxa no properly supported phylogenetic hypothesis has ever been done; and this includes relationships with reasonable taxon and character sampling of even families and subfamilies.
    [Show full text]
  • Cypriniformes: Cyprinidae)
    Zootaxa 3586: 281–303 (2012) ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ ZOOTAXA Copyright © 2012 · Magnolia Press Article ISSN 1175-5334 (online edition) urn:lsid:zoobank.org:pub:0EFA9728-D4BB-467E-A0E0-0DA89E7E30AD Molecular systematics of western North American cyprinids (Cypriniformes: Cyprinidae) SUSANA SCHÖNHUTH 1, DENNIS K. SHIOZAWA 2, THOMAS E. DOWLING 3 & RICHARD L. MAYDEN 1 1 Department of Biology, Saint Louis University, 3507 Laclede Avenue, St. Louis, MO 63103, USA. E-mail S.S: [email protected] ; E-mail RLM: [email protected] 2 Department of Biology and Curator of Fishes, Monte L. Bean Life Science Museum, Brigham Young University, Provo, UT 84602, USA. E-mail: [email protected] 3 School of Life Sciences, Arizona State University, Tempe, AZ 85287-4501, USA. E-mail: [email protected] Abstract The phylogenetic or evolutionary relationships of species of Cypriniformes, as well as their classification, is in a era of flux. For the first time ever, the Order, and constituent Families are being examined for relationships within a phylogenetic context. Relevant findings as to sister-group relationships are largely being inferred from analyses of both mitochondrial and nuclear DNA sequences. Like the vast majority of Cypriniformes, due to an overall lack of any phylogenetic investigation of these fishes since Hennig’s transformation of the discipline, changes in hypotheses of relationships and a natural classification of the species should not be of surprise to anyone. Basically, for most taxa no properly supported phylogenetic hypothesis has ever been done; and this includes relationships with reasonable taxon and character sampling of even families and subfamilies.
    [Show full text]
  • Molecular Systematics of the Phoxinin Genus Pteronotropis (Otophysi: Cypriniformes)
    Hindawi Publishing Corporation BioMed Research International Volume 2015, Article ID 298658, 8 pages http://dx.doi.org/10.1155/2015/298658 Research Article Molecular Systematics of the Phoxinin Genus Pteronotropis (Otophysi: Cypriniformes) Richard L. Mayden1 and Jason S. Allen2 1 Department of Biology, Saint Louis University, 3507 Laclede Avenue, St. Louis, MO 63103, USA 2Department of Biology, Saint Louis Community College, Meramec Campus, 11333 Big Bend Road, St. Louis, MO 63122, USA Correspondence should be addressed to Richard L. Mayden; [email protected] Received 22 June 2014; Revised 13 December 2014; Accepted 13 December 2014 Academic Editor: Vassily Lyubetsky Copyright © 2015 R. L. Mayden and J. S. Allen. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The genus Pteronotropis is widely distributed along the gulf slope of eastern North America from Louisiana to Florida and rivers in South Carolina along the Atlantic slope. Pteronotropis have very distinctive, flamboyant coloration. The habitats most frequently associated with these species include heavily vegetated backwater bayous to small sluggish or flowing tannin-stained streams. Although Pteronotropis is recognized as a valid genus, no phylogenetic analysis of all the species has corroborated its monophyly. In recent years, four additional species have been either described or elevated from synonymy: P. me rlini , P. grandipinnis, P. stone i ,and P. metal li c u s , with the wide-ranging P. hy ps el opte r u s complex. To examine relationships within this genus and test its monophyly, phylogenetic analyses were conducted using two nuclear genes, recombination activating gene 1, RAG1, and the first intron of S7 ribosomal protein gene in both maximum parsimony and Bayesian analyses.
    [Show full text]
  • Minnows and Molecules: Resolving the Broad and Fine-Scale Evolutionary Patterns of Cypriniformes
    Minnows and molecules: resolving the broad and fine-scale evolutionary patterns of Cypriniformes by Carla Cristina Stout A dissertation submitted to the Graduate Faculty of Auburn University in partial fulfillment of the requirements for the Degree of Doctor of Philosophy Auburn, Alabama May 7, 2017 Keywords: fish, phylogenomics, population genetics, Leuciscidae, sequence capture Approved by Jonathan W. Armbruster, Chair, Professor of Biological Sciences and Curator of Fishes Jason E. Bond, Professor and Department Chair of Biological Sciences Scott R. Santos, Professor of Biological Sciences Eric Peatman, Associate Professor of Fisheries, Aquaculture, and Aquatic Sciences Abstract Cypriniformes (minnows, carps, loaches, and suckers) is the largest group of freshwater fishes in the world. Despite much attention, previous attempts to elucidate relationships using molecular and morphological characters have been incongruent. The goal of this dissertation is to provide robust support for relationships at various taxonomic levels within Cypriniformes. For the entire order, an anchored hybrid enrichment approach was used to resolve relationships. This resulted in a phylogeny that is largely congruent with previous multilocus phylogenies, but has much stronger support. For members of Leuciscidae, the relationships established using anchored hybrid enrichment were used to estimate divergence times in an attempt to make inferences about their biogeographic history. The predominant lineage of the leuciscids in North America were determined to have entered North America through Beringia ~37 million years ago while the ancestor of the Golden Shiner (Notemigonus crysoleucas) entered ~20–6 million years ago, likely from Europe. Within Leuciscidae, the shiner clade represents genera with much historical taxonomic turbidity. Targeted sequence capture was used to establish relationships in order to inform taxonomic revisions for the clade.
    [Show full text]
  • Étude De L'évolution Et De La Diversité Des Poissons D'eau Douce De L
    Étude de l’évolution et de la diversité des poissons d’eau douce de l’Amérique du Nord par une approche génétique comparative Thèse Julien April Doctorat en biologie Philosophiae Doctor (PhD) Québec, Canada © Julien April, 2013 Résumé La variation génétique des poissons d‟eau douce de l‟Amérique du Nord a été analysée aux niveaux intraspécifique et interspécifique afin d‟approfondir les connaissances actuelles sur l‟évolution de la biodiversité et de faciliter la conservation de cette richesse. Premièrement, une banque de données de séquence d‟ADN mitochondrial (codes-barres génétiques) a été générée pour 5674 individus représentant 752 espèces dans le but d‟établir un outil d‟identification moléculaire et de fournir une calibration de l‟incertitude taxonomique. Cette analyse démontre que 90 % des espèces peuvent être délimitées à l‟aide de codes-barres génétiques. De plus, il apparait que la taxonomie actuelle pourrait largement sous-estimer la diversité des poissons d‟eau douce dans son ensemble tout en surestimant la diversité spécifique de certains groupes particuliers. Deuxièmement, les niveaux de divergences génétiques intraspécifique et interspécifique ont été étudiés afin d‟identifier les mécanismes évolutifs responsables des patrons généraux de répartition de la biodiversité. L‟hypothèse suggérant un rôle combiné des cycles glaciaires du Pléistocène et de l‟activité métabolique influençant les taux de mutation est appuyée par les données représentant la presque totalité des poissons d‟eau douce de l‟Amérique du Nord. Troisièmement, les patrons de variation aux niveaux de l‟ADN mitochondrial et de l‟ADN nucléaire (AFLP) ont été analysés parmi plusieurs paires de lignées évolutives codistribuées dans le nord-est de l‟Amérique afin de vérifier l‟importance du processus de spéciation allopatrique.
    [Show full text]
  • Dataset on Freshwater Fishes of Hidalgo State( Mexico)
    A peer-reviewed open-access journal ZooKeys 403: 67–109Hidalgo (2014) fishes: Dataset on freshwater fishes of Hidalgo state( Mexico)... 97 doi: 10.3897/zookeys.403.7149 DATA PAPER www.zookeys.org Launched to accelerate biodiversity research Hidalgo Fishes: Dataset on freshwater fishes of Hidalgo state (Mexico) in the MZNA fish collection of the University of Navarra (Spain) David Galicia1, Griselda Pulido-Flores2, Rafael Miranda1, Scott Monks2, Ana Amezcua-Martínez1, María Imas-Lecumberri1, Angel Chaves-Illana1, Arturo H. Ariño1 1 University of Navarra, Irunlarrea 1, 31008, Pamplona, Spain 2 University of the Hidalgo State, Centro de Investigaciones Biológicas, Ciudad del Conocimiento, 42184, Pachuca, Mexico Corresponding author: David Galicia ([email protected]) Academic editor: V. Chavan | Received 27 January 2014 | Accepted 31 March 2014 | Published 17 April 2014 Citation: Galicia D, Pulido-Flores G, Miranda R, Monks S,Amezcua-Martínez A, Imas-Lecumberri M, Chaves-Illana A, Ariño AH (2014) Hidalgo Fishes: Dataset on freshwater fishes of Hidalgo state (Mexico) in the MZNA fish collection of the University of Navarra (Spain). ZooKeys 403: 97–109. doi: 10.3897/zookeys.403.7149 GBIF key: http://gbrds.gbif. org/browse/agent?uuid=28c1c18b-64d8-4691-acdb-73e5653292f8 Resource Citation: University of Navarra (2014) Hidalgo Fishes: Dataset on freshwater fishes of Hidalgo state (Mexico) in the MZNA fish collection of the University of Navarra (Spain). 7403 data records. Contributed by Galicia D, Miranda R, Monks S, Pulido-Flores G, Ariño AH, Amezcua A, Imas M, Chaves A, Escala MC, Alemán-García B, Escorcia- Ignacio R, Vilches A, Bautista-Hernández CE, Leunda PM, Gaspar S and A López-Morales.
    [Show full text]
  • An Evaluation of the Relationship Between Stream Flow and Habitat Availability for the Devils River Minnow Dionda Diaboli
    FINAL REPORT As Required by THE ENDANGERED SPECIES PROGRAM TEXAS Grant No. TX E-115-R F09AP00241 Endangered and Threatened Species Conservation An evaluation of the relationship between stream flow and habitat availability for the Devils River minnow Dionda diaboli. Prepared by: Stephan Magnelia Carter Smith Executive Director Clayton Wolf Director, Wildlife 27 May 2014 INTERIM REPORT STATE: ____Texas_______________ GRANT NUMBER: ___ TX E-115-R___ GRANT TITLE: An evaluation of the relationship between stream flow and habitat availability for the Devils River minnow Dionda diaboli. REPORTING PERIOD: ____1 Sep 09 to 28 Nov 13_ OBJECTIVE(S): To assess the instream flow needs of the Devils River Minnow in one of the streams within the critical habitat designation over three years. Segment Objectives: The following tasks will be performed on representative reaches of Pinto Creek: a. Bathymetric mapping. b. Detailed, georeferenced maps of substrate, instream cover, and other relevant channel features will be developed. c. A two-dimensional hydraulic model will be developed. d. Habitat Utilization. e. Quantify patterns in life history and reproductive biology of the Devils River minnow. f. Data on existing stream habitat, habitat utilization, and hydraulic modeling results will be integrated and a range of alternatives presented. Significant Deviations: As described in the justification to extend Final Report deadline, and as mentioned in the 2013 Interim Report, unforeseen difficulties in completing a portion of the work had hampered completion
    [Show full text]
  • Conservation Genetics of Cyprinid Fishes (Genus Dionda) in Southwestern North America
    Conservation Genetics of Cyprinid Fishes (Genus Dionda) in Southwestern North America. II. Expansion of the Known Range of the Manantial Roundnose Minnow, Dionda argentosa Author(s): Evan W. Carson, Ashley H. Hanna, Gary P. Garrett, James R. Gibson, and John R. Gold Source: The Southwestern Naturalist, 55(4):576-581. 2010. Published By: Southwestern Association of Naturalists DOI: 10.1894/CMT-03.1 URL: http://www.bioone.org/doi/full/10.1894/CMT-03.1 BioOne (www.bioone.org) is an electronic aggregator of bioscience research content, and the online home to over 160 journals and books published by not-for-profit societies, associations, museums, institutions, and presses. Your use of this PDF, the BioOne Web site, and all posted and associated content indicates your acceptance of BioOne’s Terms of Use, available at www.bioone.org/page/terms_of_use. Usage of BioOne content is strictly limited to personal, educational, and non-commercial use. Commercial inquiries or rights and permissions requests should be directed to the individual publisher as copyright holder. BioOne sees sustainable scholarly publishing as an inherently collaborative enterprise connecting authors, nonprofit publishers, academic institutions, research libraries, and research funders in the common goal of maximizing access to critical research. 576 The Southwestern Naturalist vol. 55, no. 4 CONSERVATION GENETICS OF CYPRINID FISHES (GENUS DIONDA)IN SOUTHWESTERN NORTH AMERICA. II. EXPANSION OF THE KNOWN RANGE OF THE MANANTIAL ROUNDNOSE MINNOW, DIONDA ARGENTOSA EVAN W. CARSON,*
    [Show full text]
  • Conservation Genetics of Five Species of Dionda in West Texas
    CONSERVATION GENETICS OF FIVE SPECIES OF DIONDA IN WEST TEXAS A Thesis by ASHLEY HELEN HANNA Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE December 2011 Major Subject: Wildlife and Fisheries Sciences Conservation Genetics of Five Species of Dionda in West Texas Copyright 2011 Ashley Helen Hanna CONSERVATION GENETICS OF FIVE SPECIES OF DIONDA IN WEST TEXAS A Thesis by ASHLEY HELEN HANNA Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE Approved by: Chair of Committee, John R. Gold Committee Members, J. Spencer Johnston R. Neal Wilkins Head of Department, John B. Carey December 2011 Major Subject: Wildlife and Fisheries Sciences iii ABSTRACT Conservation Genetics of Five Species of Dionda in West Texas. (December 2011) Ashley Helen Hanna Chair of Advisory Committee: Dr. John R. Gold Minnows of the genus Dionda (Cyprinidae, Teleostei) inhabit spring-fed streams in the southwestern United States and Mexico. Five nominal species of Dionda (D. argentosa, D. diaboli, D. episcopa, D. nigrotaeniata and D. serena) are found in streams and rivers in central and west Texas. Because Dionda require clean, flowing water, they serve as aquatic indicator species of biological impacts of drought and human water use. Consequently, the ecological and conservation status of species of Dionda are important relative to monitoring habitat deterioration. This study used genetic data from geographic samples of the five nominal species of Dionda in Texas waters to document the conservation-genetics status of populations in each species.
    [Show full text]
  • Comparative Historical Biogeography of Three Groups of Nearctic Freshwater Fishes Across Central Mexico
    Journal of Fish Biology (2015) doi:10.1111/jfb.12611, available online at wileyonlinelibrary.com Comparative historical biogeography of three groups of Nearctic freshwater ishes across central Mexico R. Pérez-Rodríguez*†‡, O. Domínguez-Domínguez§, I. Doadrio‖, E. Cuevas-García¶ and G. Pérez-Ponce de León* *Departamento de Zoología, Instituto de Biología, Universidad Nacional Autónoma de México, C. P. 04510 México, Distrito Federal, México, †Posgrado en Ciencias Biológicas, Universidad Nacional Autónoma de México, Av. Universidad 3000, C. P. 04510, Coyoacán, Distrito Federal, México, §Laboratorio de Biología Acuática, Facultad de Biología, Universidad Michoacana de San Nicolás de Hidalgo, C. P. 58088 Morelia, Michoacán, México, ‖Departamento de Biodiversidad y Biología Evolutiva, Museo Nacional de Ciencias Naturales, CSIC, c/José Gutiérrez Abascal 2, E-28006 Madrid, España and ¶Facultad de Biología, Universidad Michoacana de San Nicolás de Hidalgo, C. P. 58088 Morelia, Michoacán, México (Received 3 September 2013, Accepted 19 November 2014) Biogeographic patterns of the three main Nearctic groups of continental ishes inhabiting river drainages in central Mexico (livebearing goodeids, southern Mexican notropins and species of Algansea, the last two representing independent lineages of cyprinids) were obtained and compared by following two approaches: an estimate of divergence times and using a well-deined biogeographic method. Three concordant biogeographic events were identiied among the three groups, showing some evidence of a partially congruent evolutionary history. The analysed groups show at least three independent colonization events into central Mexico: two western routes, followed by the Goodeinae and members of Algansea, and an early Plateau route followed by southern notropins. The most recent common ancestor (MRCA) of each of the three freshwater ish groups diversiied in central Mexico in the Late Miocene.
    [Show full text]
  • First Record of the Conchos Shiner Cyprinella Panarcys (Hubbs & Miller, 1978) from the Mainstem of the Rio Grande Along the USA–Mexico Border
    14 6 NOTES ON GEOGRAPHIC DISTRIBUTION Check List 14 (6): 1123–1129 https://doi.org/10.15560/14.6.1123 First record of the Conchos Shiner Cyprinella panarcys (Hubbs & Miller, 1978) from the mainstem of the Rio Grande along the USA–Mexico border Amanda K. Pinion1, 2, Stephanie D. George1, Joshuah S. Perkin1, Kevin W. Conway1, 2 1 Department of Wildlife and Fisheries Sciences, Texas A&M University, 534 John Kimbrough Boulevard, College Station, TX 77843, USA. 2 Biodiversity Research and Teaching Collections, Texas A&M University, College Station, TX 77843, USA. Corresponding author: Kevin W. Conway, [email protected] Abstract Cyprinella panarcys is considered to be endemic to the upper Río Conchos drainage of Mexico. A single individual of C. panarcys was collected from the Rio Grande along the USA–Mexico international border (Presidio Co., Texas) in April 2018. This is the first record ofC. panarcys from outside of the Río Conchos and the first record from the USA. A brief description of the external morphology of the individual collected is provided along with an updated distribution map for the species. Key words North America; Chihuahuan Desert; Texas; Río Bravo Del Norte; Cypriniformes. Academic editor: Cristiano Moreira | Received 30 August 2018 | Accepted 12 November 2018 | Published 14 December 2018 Citation: Pinion AK, George SD, Perkin JS, Conway KW (2018) First record of the Conchos Shiner Cyprinella panarcys (Hubbs & Miller, 1978) from the mainstem of the Rio Grande along the US–Mexico border. Check List 14 (6): 1123–1129. https://doi.org/10.15560/14.6.1123 Introduction Miller, 1978) was described based on a large series of specimens obtained from 3 localities within the upper The genus Cyprinella Girard, 1856 is widely distrib- Río Conchos, a major tributary of the Rio Grande (Río uted throughout eastern North America, from the St Lawrence River drainage in eastern Canada to the Bravo Del Norte) in Mexico.
    [Show full text]