Chirostoma Jordani) Ecological Risk Screening Summary
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Trophic Interactions Among Sympatric Zooplanktivorous Fish Species in Volume Change Conditions in a Large, Shallow, Tropical Lake
Neotropical Ichthyology, 9(1):169-176, 2011 Copyright © 2011 Sociedade Brasileira de Ictiologia Trophic interactions among sympatric zooplanktivorous fish species in volume change conditions in a large, shallow, tropical lake Rodrigo Moncayo-Estrada1, Owen T. Lind2 and Carlos Escalera-Gallardo1 Significant reductions in the water volume of shallow lakes impose a restriction on species segregation promoting more interactions in the trophic relationships. The diets of three closely related zooplanktivorous silversides belonging to the Atherinopsidae species flock of lake Chapala, Mexico, were analyzed at two sites (Chirostoma jordani, C. labarcae, and C. consocium). Diets were described in critical shallow (August 2000) and volume recovery conditions (August 2005). Diets included mainly cladocerans (Bosmina, Ceriodaphnia, and Daphnia) and copepods (Cyclops). A significant difference in diets was detected when comparing years (MRPP analysis, A = 0.22, p < 0.0001) and sites at different years (MRPP analysis, A = 0.17, p = 0.004). According to niche breadth mean values, species were classified as specialized and intermediate feeders. In shallow conditions, the small range of niche breadth (1.72 to 3.64) and high diet overlap values (D = 0.64, L = 8.62) indicated a high potential for interspecific exploitative interaction. When the lake volume recovered, an increase in the niche breadth range (1.04 to 4.96) and low niche overlap values (D = 0.53, L = 2.32) indicated a reduction of the species interaction. The Mann- Whitney U-test supported this pattern by showing a significant difference between years for niche overlap (p = 0.006). The increased interaction during the low volume suggests alternative segregation in life-history variations and other niche dimensions such as spatial or temporal distribution. -
Oocyte Structure and Ultrastructure in the Mexican Silverside Fish Chirostoma Humboldtianum (Atheriniformes: Atherinopsidae)
Oocyte structure and ultrastructure in the Mexican silverside fish Chirostoma humboldtianum (Atheriniformes: Atherinopsidae) Rodolfo Cárdenas1, Mónica Chávez1, José Luis González1, Patricia Aley2, Jesús Espinosa2 & Luis Felipe Jiménez-García3 1. Laboratorio de Endocrinología de Peces, Unidad de Morfología y Función, F.E.S.-Iztacala, U.N.A.M.; rodolf@servi- dor.unam.mx 2. Laboratorio de Neuromorfología, U.I.I.C.S.E., F.E.S.-Iztacala, U.N.A.M. 3. Laboratorio de Microscopia Confocal, Facultad de Ciencias, U.N.A.M. Received 11-VII-2007. Corrected 30-VI-2008. Accepted 31-VII-2008. Abstract: the structural and ultrastructural features of gonads from endemic Mexican fish have received scarce attention. This study describes the histological and ultrastructural characteristics of the oocyte in Chirostoma humboldtianum. The ovary is asynchronic, and as such, most phases of oocyte development are found in the same ovary. The complete process of oogenesis was divided in five stages: oogonium and folliculogenesis, pri- mary growth, cortical alveoli and lipid inclusions, vitellogenesis and maturation. The presence of big filaments, which appear at the end of primary growth, induces some common follicular adaptation. During primary growth, abundant ribosomes, rough endoplasmic reticulum, and mitochondria are grouped in the cytoplasm. At the end of this stage, the Z1 layer of the chorion is developed, while microvilli start to be evident as well. In the corti- cal alveoli and lipid droplets phase, intense PAS positive vesicles, some of them containing nucleoid material, are observed in the peripheral cytoplasm and the lipid droplets take a more central position. In vitellogenesis, the proteic yolk accumulates in a centripetal way while the chorion is completely formed. -
Endangered Species
FEATURE: ENDANGERED SPECIES Conservation Status of Imperiled North American Freshwater and Diadromous Fishes ABSTRACT: This is the third compilation of imperiled (i.e., endangered, threatened, vulnerable) plus extinct freshwater and diadromous fishes of North America prepared by the American Fisheries Society’s Endangered Species Committee. Since the last revision in 1989, imperilment of inland fishes has increased substantially. This list includes 700 extant taxa representing 133 genera and 36 families, a 92% increase over the 364 listed in 1989. The increase reflects the addition of distinct populations, previously non-imperiled fishes, and recently described or discovered taxa. Approximately 39% of described fish species of the continent are imperiled. There are 230 vulnerable, 190 threatened, and 280 endangered extant taxa, and 61 taxa presumed extinct or extirpated from nature. Of those that were imperiled in 1989, most (89%) are the same or worse in conservation status; only 6% have improved in status, and 5% were delisted for various reasons. Habitat degradation and nonindigenous species are the main threats to at-risk fishes, many of which are restricted to small ranges. Documenting the diversity and status of rare fishes is a critical step in identifying and implementing appropriate actions necessary for their protection and management. Howard L. Jelks, Frank McCormick, Stephen J. Walsh, Joseph S. Nelson, Noel M. Burkhead, Steven P. Platania, Salvador Contreras-Balderas, Brady A. Porter, Edmundo Díaz-Pardo, Claude B. Renaud, Dean A. Hendrickson, Juan Jacobo Schmitter-Soto, John Lyons, Eric B. Taylor, and Nicholas E. Mandrak, Melvin L. Warren, Jr. Jelks, Walsh, and Burkhead are research McCormick is a biologist with the biologists with the U.S. -
Updated Checklist of Marine Fishes (Chordata: Craniata) from Portugal and the Proposed Extension of the Portuguese Continental Shelf
European Journal of Taxonomy 73: 1-73 ISSN 2118-9773 http://dx.doi.org/10.5852/ejt.2014.73 www.europeanjournaloftaxonomy.eu 2014 · Carneiro M. et al. This work is licensed under a Creative Commons Attribution 3.0 License. Monograph urn:lsid:zoobank.org:pub:9A5F217D-8E7B-448A-9CAB-2CCC9CC6F857 Updated checklist of marine fishes (Chordata: Craniata) from Portugal and the proposed extension of the Portuguese continental shelf Miguel CARNEIRO1,5, Rogélia MARTINS2,6, Monica LANDI*,3,7 & Filipe O. COSTA4,8 1,2 DIV-RP (Modelling and Management Fishery Resources Division), Instituto Português do Mar e da Atmosfera, Av. Brasilia 1449-006 Lisboa, Portugal. E-mail: [email protected], [email protected] 3,4 CBMA (Centre of Molecular and Environmental Biology), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal. E-mail: [email protected], [email protected] * corresponding author: [email protected] 5 urn:lsid:zoobank.org:author:90A98A50-327E-4648-9DCE-75709C7A2472 6 urn:lsid:zoobank.org:author:1EB6DE00-9E91-407C-B7C4-34F31F29FD88 7 urn:lsid:zoobank.org:author:6D3AC760-77F2-4CFA-B5C7-665CB07F4CEB 8 urn:lsid:zoobank.org:author:48E53CF3-71C8-403C-BECD-10B20B3C15B4 Abstract. The study of the Portuguese marine ichthyofauna has a long historical tradition, rooted back in the 18th Century. Here we present an annotated checklist of the marine fishes from Portuguese waters, including the area encompassed by the proposed extension of the Portuguese continental shelf and the Economic Exclusive Zone (EEZ). The list is based on historical literature records and taxon occurrence data obtained from natural history collections, together with new revisions and occurrences. -
Constraints on the Timescale of Animal Evolutionary History
Palaeontologia Electronica palaeo-electronica.org Constraints on the timescale of animal evolutionary history Michael J. Benton, Philip C.J. Donoghue, Robert J. Asher, Matt Friedman, Thomas J. Near, and Jakob Vinther ABSTRACT Dating the tree of life is a core endeavor in evolutionary biology. Rates of evolution are fundamental to nearly every evolutionary model and process. Rates need dates. There is much debate on the most appropriate and reasonable ways in which to date the tree of life, and recent work has highlighted some confusions and complexities that can be avoided. Whether phylogenetic trees are dated after they have been estab- lished, or as part of the process of tree finding, practitioners need to know which cali- brations to use. We emphasize the importance of identifying crown (not stem) fossils, levels of confidence in their attribution to the crown, current chronostratigraphic preci- sion, the primacy of the host geological formation and asymmetric confidence intervals. Here we present calibrations for 88 key nodes across the phylogeny of animals, rang- ing from the root of Metazoa to the last common ancestor of Homo sapiens. Close attention to detail is constantly required: for example, the classic bird-mammal date (base of crown Amniota) has often been given as 310-315 Ma; the 2014 international time scale indicates a minimum age of 318 Ma. Michael J. Benton. School of Earth Sciences, University of Bristol, Bristol, BS8 1RJ, U.K. [email protected] Philip C.J. Donoghue. School of Earth Sciences, University of Bristol, Bristol, BS8 1RJ, U.K. [email protected] Robert J. -
The Brook Silversides (Labidesthes Sicculus) , the Other on the Cisco {Leucichthys Artedi) These Have Been Selected As the First Studies Presented for Three Reasons
THE UNIVERSITY OF ILLINOIS LIBRARY v. If CO "5 Digitized by the Internet Archive in 2011 with funding from University of Illinois Urbana-Champaign http://www.archive.org/details/ecologicalstudyo11cahn THE LIBRARY OF THE OCT 2 4 1927 UNIVERSITY OF ILLINOIS ILLINOIS BIOLOGICAL MONOGRAPHS Vol. XI January, 1927 No. 1 Editorial Committee Stephen Alfred Forbes Homer Le Roy Shantz Henry Baldwin Ward Published under the Auspices of the Graduate School by the University of Illinois Copyright, 1927, by the University of Illinois Distributed October 21, 1927 AN ECOLOGICAL STUDY OF SOUTHERN WISCONSIN FISHES The Brook Silversides (Labidestkes siccidus) and the Cisco (Leucichthys artedi) in Their Relations to the Region WITH 16 PLATES AND 27 TABLES BY ALVIN ROBERT CAHN Contributions from the Zoological Laboratory of the University of Illinois under the direction of Henry B. Ward No. 297 THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY IN ZOOLOGY IN THE GRADUATE SCHOOL OF THE UNIVERSITY OF ILLINOIS 1924 CoT TABLE OF CONTENTS Page General Ecological Considerations 7 Introduction 7 The region under discussion 9 Climatology 18 Lake Conditions 19 Ecological Habitats of Fishes 22 Rivers and Streams 22 Lakes 22 Fishes of Southern Wisconsin (Waukesha County) 25 Order Rhomboganoidea 25 Family Lepisosteidae 25 Order Cycloganoidea 25 Family Amiidae 25 Order Isospondyli 26 Family Salmonidae 26 Order Apodes 30 Family Anguillidae 30 Order Eventognathi 30 Family Catostomidae 30 Family Cyprinidae 33 Order Nematognathi -
Redalyc.BIOENCAPSULATION of Bifidobacterium Animalis AND
Revista Mexicana de Ingeniería Química ISSN: 1665-2738 [email protected] Universidad Autónoma Metropolitana Unidad Iztapalapa México Vázquez-Silva, G.; Castro-Mejía J, J.; Sánchez de la Concha, B.; González-Vázquez, R.; Mayorga-Reyes, L.; Azaola-Espinosa, A. BIOENCAPSULATION OF Bifidobacterium animalis AND Lactobacillus johnsonii IN Artemia franciscana AS FEED FOR CHARAL (Chirostoma jordani) LARVAE Revista Mexicana de Ingeniería Química, vol. 15, núm. 3, 2016, pp. 809-818 Universidad Autónoma Metropolitana Unidad Iztapalapa Distrito Federal, México Available in: http://www.redalyc.org/articulo.oa?id=62048168012 How to cite Complete issue Scientific Information System More information about this article Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Journal's homepage in redalyc.org Non-profit academic project, developed under the open access initiative Vol. 15, No. 3 (2016) 809-818 Revista Mexicana de Ingeniería Química Ingeniería de alimentos BIOENCAPSULATION OF BifidobacteriumCONTENIDO animalis AND Lactobacillus johnsonii IN Artemia franciscana AS FEED FOR CHARAL (Chirostoma jordani) LARVAE Volumen 8, número 3, 2009 / Volume 8, number 3, 2009 BIOENCAPSULACI ON´ DE Bifidobacterium animalis Y Lactobacillus johnsonii EN Artemia franciscana COMO ALIMENTO DE LARVAS DE CHARAL (Chirostoma jordani) G. Vazquez-Silva´ 2131, Derivation J. Castro-Mej and application´ıa J1, B. of Sanchez´ the Stefan-Maxwell de la Concha equations2, R. Gonzalez-V´ azquez´ 2, L. Mayorga-Reyes2, A. Azaola-Espinosa2* 1Departamento -
Relationship Between Sagittal Otolith Size and Fish Size in Engraulis Encrasicolus and Sardina Pilchardus
EISSN 2602-473X AQUATIC SCIENCES AND ENGINEERING Aquat Sci Eng 2018; 33(3): 72-76. • DOI: 10.26650/ASE201812 Original Article Relationship between Sagittal Otolith Size and Fish Size in Engraulis encrasicolus and Sardina pilchardus (Osteichthyes: Clupeiformes) in the Southern Aegean Sea, Turkey Gökçen Bilge Cite this article as: Bilge, G. (2018). Relationship between sagittal otolith size and fish size inEngraulis encrasicolus and Sardina pilchardus (Osteichthyes: Clupeiformes) in the southern Aegean Sea, Turkey. Aquatic Sciences and Engineering, 33(3): 72-76. ABSTRACT The objective of this study was to determine the regressions between otolith size (length and height), oto- lith weight vs. fish length, and weight of European anchovyEngraulis encrasicolus (Linnaeus, 1758) (n=360) and European pilchard Sardina pilchardus (Walbaum, 1792) (n=360), living off Güllük Bay, Turkey. Fish were caught using a purse seine between January and March 2014 in the southern Aegean Sea. No differences were found between the size and weight of the left and right otoliths. Equations were used to reconstruct the original dimensions of prey from the size of hard structures found in food samples of piscivorous preda- tors living in or in the vicinity of the aquatic habitat. A linear regression model was used to determine the relationship between fish length and otolith size, whereas an exponential regression model was used to describe the relationships between lengths and weights of otoliths and fish for both species. All regressions yielded high coefficients of determination (r2) of 0.78–0.93 for E. encrasicolus and 0.80–0.95 for S. pilchardus. We conclude that otolith length and otolith weight are good indicators of the length and weight of the two species. -
Multi-Locus Fossil-Calibrated Phylogeny of Atheriniformes (Teleostei, Ovalentaria)
Molecular Phylogenetics and Evolution 86 (2015) 8–23 Contents lists available at ScienceDirect Molecular Phylogenetics and Evolution journal homepage: www.elsevier.com/locate/ympev Multi-locus fossil-calibrated phylogeny of Atheriniformes (Teleostei, Ovalentaria) Daniela Campanella a, Lily C. Hughes a, Peter J. Unmack b, Devin D. Bloom c, Kyle R. Piller d, ⇑ Guillermo Ortí a, a Department of Biological Sciences, The George Washington University, Washington, DC, USA b Institute for Applied Ecology, University of Canberra, Australia c Department of Biology, Willamette University, Salem, OR, USA d Department of Biological Sciences, Southeastern Louisiana University, Hammond, LA, USA article info abstract Article history: Phylogenetic relationships among families within the order Atheriniformes have been difficult to resolve Received 29 December 2014 on the basis of morphological evidence. Molecular studies so far have been fragmentary and based on a Revised 21 February 2015 small number taxa and loci. In this study, we provide a new phylogenetic hypothesis based on sequence Accepted 2 March 2015 data collected for eight molecular markers for a representative sample of 103 atheriniform species, cover- Available online 10 March 2015 ing 2/3 of the genera in this order. The phylogeny is calibrated with six carefully chosen fossil taxa to pro- vide an explicit timeframe for the diversification of this group. Our results support the subdivision of Keywords: Atheriniformes into two suborders (Atherinopsoidei and Atherinoidei), the nesting of Notocheirinae Silverside fishes within Atherinopsidae, and the monophyly of tribe Menidiini, among others. We propose taxonomic Marine to freshwater transitions Marine dispersal changes for Atherinopsoidei, but a few weakly supported nodes in our phylogeny suggests that further Molecular markers study is necessary to support a revised taxonomy of Atherinoidei. -
Reproductive Biology of Menidia Jordani (Atheriniformes: Atherinopsidae) in Xochimilco Lake, Mexico
Reproductive biology of Menidia jordani (Atheriniformes: Atherinopsidae) in Xochimilco Lake, Mexico Yolanda Mónica Olvera-Blanco,* José Luis Gómez-Márquez,** Bertha Peña-Mendoza,** Ma. Teresa Gaspar-Dillanes*** and Carlos Pérez*** The reproductive biology of Menidia jordani (Woolman, 1894), a native fish of Mexico and one of the most important commercial fish species in Central Mexico for centuries, was analyzed. A monthly sampling bet- ween April 1995 and March 1996 was carried out. Sex ratio was 1.5:1 (female:male), determined by simple observation. Females were larger than males, the largest sizes being 7.2 cm for females and 6.3 cm for males. Standard length at first maturity was 4.8 cm for females and 5.5 cm for males. Monthly variations in gonadosomatic index (GSI), hepatosomatic index (HIS) and ovarian development stages showed that the spawning season occurred mainly from January to May. Best correlation values were between fecundity and length (r = 0.7383; p = 0.0003), compared to those found between fecundity and weight (r = 0.6132; p = 0.002). Fecundity ranged from 143 to 952 eggs per female; mean fecundity was 324 eggs. Key words: Mesa silverside, gonadosomatic index, gonadic maturity, sex ratio. Biología reproductiva de Menidia jordani (Atheriniformes: Atherinopsidae) en el Lago de Xochimilco, México Se analizó la biología reproductiva de Menidia jordani (Woolman, 1894), pez nativo de México, que por varios siglos ha sido una de las especies de peces comercialmente más importantes en el centro de México. Los muestreos se realizaron mensualmente de abril 1995 a marzo 1996. El sexo de los peces fue determi- nado macroscópicamente y la proporción de machos fue significativamente más baja que la de hembras, 1.5:1 (hembra:macho). -
Evolutionary History and Whole Genome Sequence of Pejerrey (Odontesthes Bonariensis): New Insights Into Sex Determination in Fishes
Evolutionary History and Whole Genome Sequence of Pejerrey (Odontesthes bonariensis): New Insights into Sex Determination in Fishes by Daniela Campanella B.Sc. in Biology, July 2009, Universidad Nacional de La Plata, Argentina A Dissertation submitted to The Faculty of The Columbian College of Arts and Sciences of The George Washington University in partial fulfillment of the requirements for the degree of Doctor of Philosophy January 31, 2015 Dissertation co-directed by Guillermo Ortí Louis Weintraub Professor of Biology Elisabet Caler Program Director at National Heart, Lung and Blood Institute, NIH The Columbian College of Arts and Sciences of The George Washington University certifies that Daniela Campanella has passed the Final Examination for the degree of Doctor of Philosophy as of December 12th, 2014. This is the final and approved form of the dissertation. Evolutionary History and Whole Genome Sequence of Pejerrey (Odontesthes bonariensis): New Insights into Sex Determination in Fishes Daniela Campanella Dissertation Research Committee: Guillermo Ortí, Louis Weintraub Professor of Biology, Dissertation Co-Director Elisabet Caler, Program Director at National Heart, Lung and Blood Institute, NIH, Dissertation Co-Director Hernán Lorenzi, Assistant Professor in Bioinformatics Department, J. Craig Venter Institute Rockville Maryland, Committee Member Jeremy Goecks, Assistant Professor of Computational Biology, Committee Member ! ""! ! Copyright 2015 by Daniela Campanella All rights reserved ! """! Dedication The author wishes to dedicate this dissertation to: My love, Ford, for his unconditional support and inspiration. For teaching me that admiration towards each other’s work is the fundamental fuel to go anywhere. My family and friends, for being there, meaning “there” everywhere and whenever. My grandpa Hugo, a pejerrey lover who knew how to fish, cook and enjoy the “silver arrows”. -
Evolutionary Crossroads in Developmental Biology: Cyclostomes (Lamprey and Hagfish) Sebastian M
PRIMER SERIES PRIMER 2091 Development 139, 2091-2099 (2012) doi:10.1242/dev.074716 © 2012. Published by The Company of Biologists Ltd Evolutionary crossroads in developmental biology: cyclostomes (lamprey and hagfish) Sebastian M. Shimeld1,* and Phillip C. J. Donoghue2 Summary and is appealing because it implies a gradual assembly of vertebrate Lampreys and hagfish, which together are known as the characters, and supports the hagfish and lampreys as experimental cyclostomes or ‘agnathans’, are the only surviving lineages of models for distinct craniate and vertebrate evolutionary grades (i.e. jawless fish. They diverged early in vertebrate evolution, perceived ‘stages’ in evolution). However, only comparative before the origin of the hinged jaws that are characteristic of morphology provides support for this phylogenetic hypothesis. The gnathostome (jawed) vertebrates and before the evolution of competing hypothesis, which unites lampreys and hagfish as sister paired appendages. However, they do share numerous taxa in the clade Cyclostomata, thus equally related to characteristics with jawed vertebrates. Studies of cyclostome gnathostomes, has enjoyed unequivocal support from phylogenetic development can thus help us to understand when, and how, analyses of protein-coding sequence data (e.g. Delarbre et al., 2002; key aspects of the vertebrate body evolved. Here, we Furlong and Holland, 2002; Kuraku et al., 1999). Support for summarise the development of cyclostomes, highlighting the cyclostome theory is now overwhelming, with the recognition of key species studied and experimental methods available. We novel families of non-coding microRNAs that are shared then discuss how studies of cyclostomes have provided exclusively by hagfish and lampreys (Heimberg et al., 2010).