Hermann, J. 1804 Observationes Zoologicae, Quibus Novae
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Modifications of the Digestive Tract for Holding Air in Loricariid and Scoloplacid Catfishes
Copeia, 1998(3), pp. 663-675 Modifications of the Digestive Tract for Holding Air in Loricariid and Scoloplacid Catfishes JONATHAN W. ARMBRUSTER Loricariid catfishes have evolved several modifications of the digestive tract that • appear to fWIction as accessory respiratory organs or hydrostatic organs. Adapta tions include an enlarged stomach in Pterygoplichthys, Liposan:us, Glyptoperichthys, Hemiancistrus annectens, Hemiancistrus maracaiboensis, HyposWmus panamensis, and Lithoxus; a U-shaped diverticulum in Rhinelepis, Pseudorinelepis, Pogonopoma, and Po gonopomoides; and a ringlike diverticulum in Otocinclus. Scoloplacids, closely related to loricariids, have enlarged, clear, air-filled stomachs similar to that of Lithoxus. The ability to breathe air in Otocinclus was confirmed; the ability of Lithoxus and Scoloplax to breathe air is inferred from morphology. The diverticula of Pogonopomoides and Pogonopoma are similar to swim bladders and may be used as hydrostatic organs. The various modifications of the stomach probably represent characters that define monophyletic clades. The ovaries of Lithoxus were also examined and were sho~ to have very few (15--17) mature eggs that were large (1.6-2.2 mm) for the small size of the fish (38.6-41.4 mm SL). Los bagres loricariid an desarrollado varias modificaciones del canal digestivo que aparentan fWIcionar como organos accesorios de respiracion 0 organos hidrostati cos. Las adaptaciones incluyen WI estomago agrandado en Pterygoplichthys, Liposar cus, Glyproperichthys, Hemiancistrus annectens, Hemiancistrus maracaiboensis, Hyposto mus panamensis, y Lithoxus; WI diverticulum en forma de U en Rhinelepis, Pseudori nelepis, Pogonopoma, y Pogonopomoides; y WI diverticulum en forma de circulo en Otocinclus. Scoloplacids, de relacion cercana a los loricariids, tienen estomagos cla ros, agrandados, llenos de aire similares a los de Lithoxus. -
Fisheries Overview, Including Mixed-Fisheries Considerations
ICES Fisheries Overviews Bay of Biscay and Iberian Coast ecoregion Published 30 November 2020 Version 2: 3 December 2020 6.2 Bay of Biscay and Iberian Coast ecoregion – Fisheries overview, including mixed-fisheries considerations Table of contents Executive summary .................................................................................................................................................................. 1 Definition of the ecoregion ...................................................................................................................................................... 1 Mixed-fisheries considerations Bay of Biscay .......................................................................................................................... 2 Mixed-fisheries considerations Iberian waters ...................................................................................................................... 10 Who is fishing ........................................................................................................................................................................ 18 Catches over time .................................................................................................................................................................. 21 Description of the fisheries .................................................................................................................................................... 23 Fisheries management measures ......................................................................................................................................... -
A New Black Baryancistrus with Blue Sheen from the Upper Orinoco (Siluriformes: Loricariidae)
Copeia 2009, No. 1, 50–56 A New Black Baryancistrus with Blue Sheen from the Upper Orinoco (Siluriformes: Loricariidae) Nathan K. Lujan1, Mariangeles Arce2, and Jonathan W. Armbruster1 Baryancistrus beggini, new species, is described from the upper Rı´o Orinoco and lower portions of its tributaries, the Rı´o Guaviare in Colombia and Rı´o Ventuari in Venezuela. Baryancistrus beggini is unique within Hypostominae in having a uniformly dark black to brown base color with a blue sheen in life, and the first three to five plates of the midventral series strongly bent, forming a distinctive keel above the pectoral fins along each side of the body. It is further distinguished by having a naked abdomen, two to three symmetrical and ordered predorsal plate rows including the nuchal plate, and the last dorsal-fin ray adnate with adipose fin via a posterior membrane that extends beyond the preadipose plate up to half the length of the adipose-fin spine. Se describe una nueva especie, Baryancistrus beggini, del alto Rı´o Orinoco y las partes bajas de sus afluentes: el rı´o Guaviare en Colombia, y el rı´o Ventuari en Venezuela. Baryancistrus beggini es la u´ nica especie entre los Hypostominae que presenta fondo negro oscuro a marro´ n sin marcas, con brillo azuloso en ejemplares vivos. Las primeras tres a cinco placas de la serie medioventral esta´n fuertemente dobladas, formando una quilla notable por encima de las aletas pectorales en cada lado del cuerpo. Baryancistrus beggini se distingue tambie´n por tener el abdomen desnudo, dos o tres hileras de placas predorsales sime´tricas y ordenadas (incluyendo la placa nucal) y el u´ ltimo radio de la aleta dorsal adherido a la adiposa a trave´s de una membrana que se extiende posteriormente, sobrepasando la placa preadiposa y llegando hasta la mitad de la espina adiposa. -
Diverse Deep-Sea Anglerfishes Share a Genetically Reduced Luminous
RESEARCH ARTICLE Diverse deep-sea anglerfishes share a genetically reduced luminous symbiont that is acquired from the environment Lydia J Baker1*, Lindsay L Freed2, Cole G Easson2,3, Jose V Lopez2, Dante´ Fenolio4, Tracey T Sutton2, Spencer V Nyholm5, Tory A Hendry1* 1Department of Microbiology, Cornell University, New York, United States; 2Halmos College of Natural Sciences and Oceanography, Nova Southeastern University, Fort Lauderdale, United States; 3Department of Biology, Middle Tennessee State University, Murfreesboro, United States; 4Center for Conservation and Research, San Antonio Zoo, San Antonio, United States; 5Department of Molecular and Cell Biology, University of Connecticut, Storrs, United States Abstract Deep-sea anglerfishes are relatively abundant and diverse, but their luminescent bacterial symbionts remain enigmatic. The genomes of two symbiont species have qualities common to vertically transmitted, host-dependent bacteria. However, a number of traits suggest that these symbionts may be environmentally acquired. To determine how anglerfish symbionts are transmitted, we analyzed bacteria-host codivergence across six diverse anglerfish genera. Most of the anglerfish species surveyed shared a common species of symbiont. Only one other symbiont species was found, which had a specific relationship with one anglerfish species, Cryptopsaras couesii. Host and symbiont phylogenies lacked congruence, and there was no statistical support for codivergence broadly. We also recovered symbiont-specific gene sequences from water collected near hosts, suggesting environmental persistence of symbionts. Based on these results we conclude that diverse anglerfishes share symbionts that are acquired from the environment, and *For correspondence: that these bacteria have undergone extreme genome reduction although they are not vertically [email protected] (LJB); transmitted. -
Panaque (Panaque), with Descriptions of Three New Species from the Amazon Basin (Siluriformes, Loricariidae)
Copeia 2010, No. 4, 676–704 Revision of Panaque (Panaque), with Descriptions of Three New Species from the Amazon Basin (Siluriformes, Loricariidae) Nathan K. Lujan1, Max Hidalgo2, and Donald J. Stewart3 The Panaque nigrolineatus group (subgenus Panaque) is revised; three nominal species—P. cochliodon, P. nigrolineatus, and P. suttonorum—are redescribed and three new species are described. Panaque armbrusteri, new species, is widespread in the Tapajo´ s River and its tributaries in Brazil and is distinguished by having a supraoccipital hump, higher numbers of jaw teeth and an ontogenetic increase in interpremaxillary and intermandibular tooth-row angles, relatively short paired-fin spines, and dorsal margin of infraorbital six flared laterally. Panaque schaeferi, new species, is widespread in main-channel habitats of the upper Amazon (Solimo˜es) River basin in Brazil and Peru; it is distinguished by having a coloration consisting of dark or faded black spots evenly distributed on a pale gray to brown base, and by its large adult body size (.570 mm SL). Panaque titan, new species, is distributed in larger, lowland to piedmont rivers of the Napo River basin in Ecuador, and is distinguished by having a postorbital pterotic region bulged beyond the ventral pterotic margin, coloration consisting of irregular and widely spaced dark gray to brown stripes on light brown to tan base, and large adult body size (.390 mm SL). A relatively large pterotic, indicative of an enlarged gas bladder and gas bladder capsule, and allometric increases in tooth number are hypothesized to be synapomorphies uniting members of the subgenus Panaque. Se reviso´ el grupo Panaque nigrolineatus (subge´nero Panaque); se redescriben tres especies nominales—P. -
Amazon Alive: a Decade of Discoveries 1999-2009
Amazon Alive! A decade of discovery 1999-2009 The Amazon is the planet’s largest rainforest and river basin. It supports countless thousands of species, as well as 30 million people. © Brent Stirton / Getty Images / WWF-UK © Brent Stirton / Getty Images The Amazon is the largest rainforest on Earth. It’s famed for its unrivalled biological diversity, with wildlife that includes jaguars, river dolphins, manatees, giant otters, capybaras, harpy eagles, anacondas and piranhas. The many unique habitats in this globally significant region conceal a wealth of hidden species, which scientists continue to discover at an incredible rate. Between 1999 and 2009, at least 1,200 new species of plants and vertebrates have been discovered in the Amazon biome (see page 6 for a map showing the extent of the region that this spans). The new species include 637 plants, 257 fish, 216 amphibians, 55 reptiles, 16 birds and 39 mammals. In addition, thousands of new invertebrate species have been uncovered. Owing to the sheer number of the latter, these are not covered in detail by this report. This report has tried to be comprehensive in its listing of new plants and vertebrates described from the Amazon biome in the last decade. But for the largest groups of life on Earth, such as invertebrates, such lists do not exist – so the number of new species presented here is no doubt an underestimate. Cover image: Ranitomeya benedicta, new poison frog species © Evan Twomey amazon alive! i a decade of discovery 1999-2009 1 Ahmed Djoghlaf, Executive Secretary, Foreword Convention on Biological Diversity The vital importance of the Amazon rainforest is very basic work on the natural history of the well known. -
Informe Evaluaciones EICAT UICN
EVALUACIÓN DEL IMPACTO AMBIENTAL DE ESPECIES EXÓTICAS INVASORAS EEN LA CUENCA DEL GUADIANA A TRAVÉS DE LA METODOLOGÍA EICAT Abril 2019 Con el apoyo de: Título Evaluación del impacto ambiental de especies exóticas invasoras en la cuenca del Guadiana a través de la metodología EICAT Versión Abril de 2019 Idioma original Español Unidad responsable Programa de especies UICN‐Med Redactado por Laura Capdevila Argüelles (GEIB), Helena Clavero Sousa (UICN‐ Med) y Catherine Numa (UICN‐Med) Proyecto “Evaluación del impacto potencial de especies introducidas en España: análisis de viabilidad del sistema de clasificación EICAT” financiado con el apoyo del Ministerio para la Transición Ecológica, a través de la Fundación Biodiversidad, y de la Fundación MAVA 1 Índice AGRADECIMIENTOS ................................................................................................................................ 3 ACRÓNIMOS ............................................................................................................................................ 4 ANTECEDENTES ....................................................................................................................................... 5 METODOLOGÍA ....................................................................................................................................... 6 FICHAS‐RESUMEN DE LAS EVALUACIONES EICAT ................................................................................... 7 Azolla filiculoides ................................................................................................................................ -
006336-W19 JIRCAS Working Report90 本文.Indd
JIRCAS Working ReportSection No.90 Ⅳ - 2: Morioka and Vongvichith 117 Importance of resources of small-sized fishes as fundamental components of food resources and fish diversity in Lao PDR Shinsuke Morioka1, Bounsong Vongvichith2 1 Japan International Research Center for Agricultural Sciences (JIRCAS), Tsukuba, Japan 2 Living Aquatic Resources Research Center (LRReC), National Agriculture and Forestry Research Institute of (NAFRI), Vientiane, Lao PDR Abstract Growth, reproduction, and lifespan were reviewed in three indigenous small-sized fishes in Lao PDR belonging to different taxa, Parambassis siamensis (Ambassidae), Rasbora rubrodorsalis (Cyprinidae), and Clupeichthys aesarnensis (Clupeidae). All three species were estimated to have short lifespans (< one year) and breed throughout the year with plural generation alternations within a year. Environment in high temperature accelerated initial growth in all species. In C. aesarnensis, while higher temperature was considered to lead to earlier maturation and downsizing of maturation size, evolutionary downsizing owing to overfishing was of another concern. As the recent economic development and population growth within the country has led to an increase in fish demand and deterioration of the environment, all the species are considered to be in danger of stock decline. Therefore, in the present study, some ideas for stock managements for these species based on biological aspects are discussed. Introduction Lao PDR is a country with rich resources of indigenous fish species, particularly in the basins of the Mekong River and its tributaries. Estimates of the numbers of indigenous fish species in this region range from 700 to more than 1,200 (Kottelat 2001; Sverdrup-Jensen 2002). Among these, various indigenous small-sized fishes are distributed across the country regardless of taxa. -
Fishfriendly Innovative Technologies for Hydropower D1.1 Metadata
Ref. Ares(2017)5306028 - 30/10/2017 Fishfriendly Innovative Technologies for Hydropower Funded by the Horizon 2020 Framework Programme of the European Union D1.1 Metadata overview on fish response to disturbance Project Acronym FIThydro Project ID 727830 Work package 1 Deliverable Coordinator Christian Wolter Author(s) Ruben van Treeck (IGB), Jeroen Van Wich- elen (INBO), Johan Coeck (INBO), Lore Vandamme (INBO), Christian Wolter (IGB) Deliverable Lead beneficiary INBO, IGB Dissemination Level Public Delivery Date 31 October 2017 Actual Delivery Date 30 October 2017 Acknowledgement This project has received funding from the European Union’s Horizon 2020 research and inno- vation program under grant agreement No 727830. Executive Summary Aim Environmental assessment of hydropower facilities commonly includes means of fish assem- blage impact metrics, as e.g. injuries or mortality. However, this hardly allows for conclusion at the population or community level. To overcome this significant knowledge gap and to enable more efficient assessments, this task aimed in developing a fish species classification system according to their species-specific sensitivity against mortality. As one result, most sensitive fish species were identified as suitable candidates for in depth population effects and impact studies. Another objective was providing the biological and autecological baseline for developing a fish population hazard index for the European fish fauna. Methods The literature has been extensively reviewed and analysed for life history traits of fish providing resilience against and recovery from natural disturbances. The concept behind is that species used to cope with high natural mortality have evolved buffer mechanisms against, which might also foster recovery from human induced disturbances. -
From a Cocoa Plantation in Southern Bahia, Brazil
NORTH-WESTERN JOURNAL OF ZOOLOGY 12 (1): 159-165 ©NwjZ, Oradea, Romania, 2016 Article No.: e151512 http://biozoojournals.ro/nwjz/index.html Diet of Dendropsophus branneri (Cochran, 1948) (Anura: Hylidae) from a cocoa plantation in southern Bahia, Brazil Indira Maria CASTRO1, Raoni REBOUÇAS1,2 and Mirco SOLÉ1,3,* 1. Programa de Pós-Graduação em Zoologia, Universidade Estadual de Santa Cruz, Rodovia Jorge Amado, Km. 16, Salobrinho, CEP: 45662-900 Ilhéus, Bahia, Brazil. 2. Programa de Pós-Graduação em Ciências Biológicas (Biologia Animal), Universidade Federal do Espirito Santo, Av. Fernando Ferrari, 514, Prédio Bárbara Weinberg, 29075-910 Vitória, Espirito Santo, Brazil. 3. Departamento de Ciências Biológicas, Universidade Estadual de Santa Cruz, Rodovia Jorge Amado, km. 16, Salobrinho, CEP: 45662-900 Ilhéus, Bahia, Brasil. *Corresponding author, M. Solé, E-mail: [email protected] Received: 11. June 2015 / Accepted: 18. September 2015 / Available online: 30. May 2016 / Printed: June 2016 Abstract. In this study we analyze the diet of a population of Dendropsophus branneri from a cocoa plantation in southern Bahia, Brazil. Frogs were captured monthly from August 2010 to July 2011. Stomach contents were retrieved through stomach-flushing and later identified to order level. Our results show that D. branneri feeds mainly on arthropds, such as Diptera, larval Lepidoptera and Araneae. Based on the identified food items and the low number of prey per stomach we conclude that the studied population of D. branneri uses a “sit and wait” strategy. We further conclude that stomach flushing can be successfully applied to frogs from a size of 14.4mm. Key words: trophic resources, stomach flushing, feeding habits, Hylidae, cabruca, Atlantic Rainforest. -
O Mimetismo Das Serpentes Corais Em Ambientes
UNIVERSIDADE DE BRASÍLIA INSTITUTO DE CIÊNCIAS BIOLÓGICAS DEPARTAMENTO DE ECOLOGIA O MIMETISMO DAS SERPENTES CORAIS EM AMBIENTES CAMPESTRES, SAVÂNICOS E FLORESTAIS DA AMÉRICA DO SUL Frederico Gustavo Rodrigues França Brasília-DF 2008 UNIVERSIDADE DE BRASÍLIA INSTITUTO DE CIÊNCIAS BIOLÓGICAS DEPARTAMENTO DE ECOLOGIA O MIMETISMO DAS SERPENTES CORAIS EM AMBIENTES CAMPESTRES, SAVÂNICOS E FLORESTAIS DA AMÉRICA DO SUL Frederico Gustavo Rodrigues França Orientador: Alexandre Fernandes Bamberg de Araújo Tese apresentada ao Departamento de Ecologia do Instituto de Ciências Biológicas da Universidade de Brasília, como parte dos requisitos necessários para a obtenção do título de Doutor em Ecologia. Brasília-DF 2008 Trabalho realizado junto ao Departamento de Ecologia do Instituto de Ciências Biológicas da Universidade de Brasília, sob orientação do Prof. Alexandre Fernandes Bamberg de Araújo, com o apoio financeiro da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) e Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), como parte dos requisitos para obtenção do título de Doutor em Ecologia. Data da Defesa: 01 de agosto de 2008 Banca Examinadora Prof. Dr. Alexandre Fernandes Bamberg de Araújo (Orientador) ________________________________________________ Prof. Dr. Daniel Oliveira Mesquita ________________________________________________ Prof. Dr. Guarino Rinaldi Colli ________________________________________________ Prof. Dr. Hélio Ricardo da Silva ________________________________________________ Prof. Dr. Raimundo -
Osmoregulation in Three Species of Ambassidae (Osteichthyes: Perciformes) from Estuaries in Natal
s. Afr. 1. Zool. 1990,25(4) 229 Osmoregulation in three species of Ambassidae (Osteichthyes: Perciformes) from estuaries in Natal T.J. Martin Coastal Research Unit of Zulu land, Department of Zoology, University of Zulu land, Kwa Dlangezwa, 3886 South Africa Received 25 July 1989; accepted 17 July 1990 Whole blood osmotic regulation was evaluated in three co-ocaming, estuarine species of Ambassis exposed to ambient salinities from fresh water (0,13%0) to 53%0. Blood molality of all three species, acclimated to fresh water, showed significant increases over the range of ambient salinities from fresh water through 5%0 and stabilized only in the range 18%..-35%0). Osmotic concentrations of all three species rose abruptly at salinities above 35%0 and no species survived direct transfer into ambient salinities above 53%0. A productus, collected in fresh water, required 24 h prior acclimation at 18%0 for survival in sea water (35%0). A gymnocephaJus acclimated in sea water showed the least tolerance of the three species to low salinities and experienced a 42% decrease in blood osmotic concentration when exposed to fresh water whereas the decrease for A. natalensis and A productus was only 20% and 23% respectively. Histological investigation of Ambassis kidneys indicated that all three species have structurally advanced kidneys of the mesonephric type common to most teleosts which spend a proportion of their lives in a hyposmotic medium. Osmotic regulatory characteristics of Ambassis species are discussed in relation to their distribution in estuaries. Die regulering van bloedosmose van die drie Ambassis-spesies wat in riviermondings voorkom en blootgestel is aan omringende water met soutgehaltes vanaf varswater (0,13%0) tot 53%0 is ge-evalueer.