DOCSLIB.ORG

Metabolic Responses to Salinity Changes in the Subantarctic Notothenioid Teleost Eleginops Maclovinus

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Metabolic Responses to Salinity Changes in the Subantarctic Notothenioid Teleost Eleginops Maclovinus Metabolic responses to salinity changes in the subantarctic notothenioid teleost Eleginops maclovinus L. Vargas-Chacoff, F. Moneva, R. Oyarzún, D. Martínez, E. Saavedra, I. Ruiz-Jarabo, J. L. P. Muñoz, C. Bertrán & J. M. Mancera Polar Biology ISSN 0722-4060 Volume 39 Number 7 Polar Biol (2016) 39:1297-1308 DOI 10.1007/s00300-015-1854-1 1 23 Your article is protected by copyright and all rights are held exclusively by Springer- Verlag Berlin Heidelberg. This e-offprint is for personal use only and shall not be self- archived in electronic repositories. If you wish to self-archive your article, please use the accepted manuscript version for posting on your own website. You may further deposit the accepted manuscript version in any repository, provided it is only made publicly available 12 months after official publication or later and provided acknowledgement is given to the original source of publication and a link is inserted to the published article on Springer's website. The link must be accompanied by the following text: "The final publication is available at link.springer.com”. 1 23 Author's personal copy Polar Biol (2016) 39:1297–1308 DOI 10.1007/s00300-015-1854-1 ORIGINAL PAPER Metabolic responses to salinity changes in the subantarctic notothenioid teleost Eleginops maclovinus 1,2 1 1 1 1 L. Vargas-Chacoff • F. Moneva • R. Oyarzu´n • D. Martı´nez • E. Saavedra • 3 4 1 5 I. Ruiz-Jarabo • J. L. P. Mun˜oz • C. Bertra´n • J. M. Mancera Received: 2 March 2015 / Revised: 25 November 2015 / Accepted: 30 November 2015 / Published online: 8 December 2015 Ó Springer-Verlag Berlin Heidelberg 2015 Abstract Eleginops maclovinus is an endemic, sub- affected by salinity changes, probably due to its role as a antarctic Notothenioidei species. This study examined the supplier of energetic substrates. The gills and kidney, influence of different environmental salinities (5, 15, and osmoregulatory tissues, maintained their energy metabo- 45 psu; and 32 psu as a control) on energy metabolism in E. lism levels with minor modifications. In conclusion, E. maclovinus over a period of 14 days. Metabolite contents maclovinus exhibits metabolic adjustments to adapt to and enzymatic activities related to carbohydrate, amino different salinities, showing the best responses in isosmotic acid, and lipid metabolisms were evaluated in metabolic environmental salinities. (liver) and osmoregulatory (gill and kidney) tissues. At extreme salinities (5 and 45 psu), the liver showed a high Keywords Carbohydrates Á Eleginops maclovinus Á consumption of energy reserves, mainly as amino acids and Gills Á Kidney Á Lipids Á Liver Á Metabolism carbohydrates. Carbohydrate metabolism in the gills did not change under different salinities, but increased lactate levels were found, suggesting that this tissue may use Introduction lactate as an energy substrate. Amino acid metabolism in the gills decreased at 5 psu but increased at 45 psu, and Euryhaline teleosts can acclimate to a variety of salinity lipid metabolism increased at 5 and 15 psu during the first conditions. This adaptive capacity depends on several days of the trial, indicating a possible use of lipids as factors, including energy supply and demand in relation to energy. Kidney carbohydrate catabolism and amino acid osmoregulatory processes (Soengas et al. 2007). Impor- metabolism increased after 14 days at 45 psu, while lipid tantly, successful acclimation to changes in salinity may metabolism did not vary in relation to salinity changes. require metabolic reorganization to meet increased ener- Together, these results suggest that the liver is most getic demands (Boeuf and Payan 2001; Soengas et al. 2007; Vargas-Chacoff et al. 2009a). To adapt to different salinities, teleosts present & L. Vargas-Chacoff osmoregulatory and metabolic adjustments in a number of [email protected] tissues, such as the gills, kidney, and liver. For example, 1 Instituto de Ciencias Marinas y Limnolo´gicas, Universidad sodium and chloride transport across the gill epithelium Austral de Chile, Valdivia, Chile adjusts to environmental salinity, exercising ion uptake in 2 Centro Fondap de Investigacio´n de Altas Latitudes (IDEAL), hypoosmotic water and ion excretion in hyperosmotic Universidad Austral de Chile, Valdivia, Chile water (McCormick 2001). In turn, the kidney plays an 3 Centre of Marine Sciences (CCMar), Universidade do active role in the extrusion of divalent ions and the elim- Algarve, Campus de Gambelas, Faro, Portugal ination of excess water in hyperosmotic and hypoosmotic 4 Centro I-Mar, Universidad de los Lagos, Puerto Montt, Chile environments, respectively (Bijvelds et al. 1998; Kelly and Woo 1999; Kelly et al. 1999; Beyenbach 2000). Adaptive 5 Departamento de Biologı´a, Facultad de Ciencias del Mar y Ambientales, Campus de Excelencia Internacional del Mar modifications to salinity require energy (i.e. ATP) and may (CEI-MAR), Universidad de Ca´diz, Ca´diz, Spain alter overall energy requirements, and the kidney has an 123 Author's personal copy 1298 Polar Biol (2016) 39:1297–1308 additional function in changing intermediary metabolism temperature (12.0 ± 0.5 °C) conditions. Specimens of E. (Soengas et al. 1994, 2007; Kelly and Woo 1999; Arjona maclovinus (150 ± 5 g) were fed daily at 1 % of their et al. 2009). Finally, the liver is the main site of glycogen/ body weight with commercial dry pellets (Skretting glucose turnover, ammoniagenesis, fatty acid synthesis, Nutrece Defense 100) containing 48 % protein, 22 % fat, and gluconeogenesis in teleosts (Perago´n et al. 1998). Liver 13 % carbohydrates, 8 % moisture, and 8.5 % ash. metabolism may become enhanced during osmotic adap- Before subjecting fish to salinity challenges, eight fish tation to provide fuel for metabolic and osmoregulatory were sampled as pre-transfer controls. Then, the SW-ac- processes, especially in osmoregulatory tissues such as the climated fish were divided as previously mentioned into gills and kidney (Vargas-Chacoff et al. 2009a, b; Costas four groups and subjected to one of the following salinities: et al. 2011). low salinity water (LSW; 5 psu); medium salinity water Eleginops maclovinus (Valenciennes 1830) is a sub- (MSW; 15 psu); SW (32 psu, control group); or high antarctic Notothenioidei endemic to the Patagonian region salinity water (HSW; 45 psu). Samples were taken 1, 3, 7, of South America. Due to its high degree of euryhalinity, and 14 days post-transfer (dpt). this species can be found in environments with different All experimental procedures complied with guidelines salinities, including the open sea, coastal waters, estuaries, of the Comisio´n Nacional de Ciencias y Tecnologı´ade and freshwater rivers (Pave´s et al. 2005; Pequen˜o et al. Chile (CONICYT) and the Universidad Austral de Chile 2010). Moreover, Reyes and Hune (2013) found E. for the use of laboratory animals. maclovinus inhabiting intertidal pools isolated from the tidal flux for extended periods. In these pools, evaporation Tissue sampling can increase the salinity up to 3–4 times higher than sea- water (Nordlie 1985; Panfili et al. 2004, 2006; Tine et al. Fish were netted and subjected to lethal doses of 2-phe- 2007). Another report in the osmoregulatory system of E. noxyethanol (1 ml l-) and cervical dislocation before tis- maclovinus studied the influence of acclimation to four sues were sampled. The fish were weighed, and then a gill different environmental salinities (5, 15, 32, and 45 psu) arch (dried with absorbent paper), a portion of the kidney, over 14 days (Vargas-Chacoff et al. 2014a), finding that and the complete liver were extracted from each fish, fro- specimens used allostatic changes to accommodate their zen in liquid nitrogen, and stored at -80 °C. osmotic system (McEwen and Wingfield 2003). However, modifications in the intermediary metabolism Tissue metabolites and enzymatic activities related to osmoregulation have been poorly studied in subantarctic teleosts (Magnoni et al. 2013) and, to the best Frozen liver, kidney, and gill samples were finely minced of our knowledge, these regulatory mechanisms have never in an ice-cooled Petri dish and divided into two aliquots to been analysed in E. maclovinus. Therefore, the objective of assess metabolite levels and enzymatic activities. To assess the present study was to examine the influence of four metabolite levels, the frozen tissues were homogenized by different environmental salinities (5, 15, and 45 psu, plus a ultrasonic disruption with 7.5 volumes of ice-cooled 0.6°N control group at 32 psu) on the energy metabolism of perchloric acid, neutralized using 1 M potassium bicar- different tissues (liver, gills, and kidney) in juvenile E. bonate, and centrifuged for 30 min at 13,0009g (Eppen- maclovinus using a 14-day acclimation time-course dorf 5415R). The resulting supernatant was used to experiment. determine tissue metabolite levels. Tissue lactate and triglyceride levels were spectrophotometrically measured using commercial kits (Spinreact, Lactate Ref. 1001330 Materials and methods and Triglycerides Ref. 1001311). Tissue glycogen con- centrations were assessed using the Keppler and Decker Fish and experimental design (1974) method. Glucose levels were obtained after glyco- gen breakdown (i.e. after subtracting free glucose levels) The same specimen and experimental procedures used in using a commercial kit (Spinreact, Glucose-HK Ref. Vargas-Chacoff et al. (2014a) were applied in the present 1001200). Total a-amino acid levels were assessed using study. Briefly, juvenile specimens of E. maclovinus
Load more

Recommended publications
  • Phylogeography of the Sub-Antarctic Notothenioid Wsh Eleginops Maclovinus: Evidence of Population Expansion
    Mar Biol (2012) 159:499–505 DOI 10.1007/s00227-011-1830-4 ORIGINAL PAPER Phylogeography of the sub-Antarctic notothenioid Wsh Eleginops maclovinus: evidence of population expansion Santiago Guillermo Ceballos · Enrique Pablo Lessa · Mariela Fernanda Victorio · Daniel Alfredo Fernández Received: 8 June 2011 / Accepted: 20 October 2011 / Published online: 16 November 2011 © Springer-Verlag 2011 Abstract Phylogeography studies add insights into the Introduction geographic and evolutionary processes that underline the genetic divergence of populations. This work examines the Eleginops maclovinus (Cuvier and Valenciennes 1830), geographic genetic structure of the Patagonian blennie, Ele- known as róbalo in Argentina and Chile, is a notothenioid ginops maclovinus, a notothenioid (Perciformes) endemic Wsh (Perciformes) of the monotypic family Eleginopidae. to South American temperate and sub-Antarctic waters, This marine Wsh is endemic to the coastal temperate and using mitochondrial DNA cytochrome b sequences. We sub-Antarctic waters of South America with a range along found 58 haplotypes in the analysis of 261 individual the Atlantic and PaciWc Patagonian coasts from Valparaiso, sequences of 833 base pairs in length. Among-population Chile (33°S) (Pequeño 1989) to San Matias Gulf, Argentina variance was very low (1.62%) and many haplotypes were (40°S) (Cousseau and Perrotta 2000). This eurithermic and shared between several populations across the species geo- euryhaline species that has been described as a protandrous graphic range. Genetic diVerentiation was not consistent hermaphrodite (Calvo et al. 1992; Brickle et al. 2005; with a simple model of isolation by distance, possibly sug- Licandeo et al. 2006) inhabits costal waters, river mouths gesting a lack of equilibrium between gene Xow and local and estuaries (Gosztonyi 1980).
    [Show full text]
  • Dietary Resilience Among Hunter-Gatherers of Tierra Del Fuego: Isotopic Evidence in a Diachronic Perspective
    RESEARCH ARTICLE Dietary resilience among hunter-gatherers of Tierra del Fuego: Isotopic evidence in a diachronic perspective Mary Anne Tafuri1☯*, Atilio Francisco Javier Zangrando2☯*, Augusto Tessone3, Sayuri Kochi3, Jacopo Moggi Cecchi4, Fabio Di Vincenzo1, Antonio Profico1, Giorgio Manzi1 1 Dipartimento di Biologia Ambientale, Sapienza Università di Roma, Rome, Italy, 2 CADIC ± CONICET, Ushuaia, Argentina, 3 INGEIS-CONICET, PabelloÂn INGEIS, Buenos Aires, Argentina, 4 Dipartimento di Biologia, Università degli Studi di Firenze, Firenze, Italy a1111111111 a1111111111 ☯ These authors contributed equally to this work. a1111111111 * [email protected] (MAT); [email protected] (AFJZ) a1111111111 a1111111111 Abstract The native groups of Patagonia have relied on a hunter-gatherer economy well after the first Europeans and North Americans reached this part of the world. The large exploitation of OPEN ACCESS marine mammals (i.e., seals) by such allochthonous groups has had a strong impact on the Citation: Tafuri MA, Zangrando AFJ, Tessone A, Kochi S, Moggi Cecchi J, Di Vincenzo F, et al. local ecology in a way that might have forced the natives to adjust their subsistence strate- (2017) Dietary resilience among hunter-gatherers gies. Similarly, the introduction of new foods might have changed local diet. These are the of Tierra del Fuego: Isotopic evidence in a premises of our isotopic-based analysis. There is a large set of paleonutritional investiga- diachronic perspective. PLoS ONE 12(4): tions through isotopic analysis on Fuegians groups, however a systematic exploration of e0175594. https://doi.org/10.1371/journal. pone.0175594 food practices across time in relation to possible pre- and post-contact changes is still lack- ing.
    [Show full text]
  • Piscirickettsiosis and Piscirickettsia Salmonis in Fish: a Review
    Journal of Fish Diseases 2014, 37, 163–188 doi:10.1111/jfd.12211 Review Piscirickettsiosis and Piscirickettsia salmonis in fish: a review M Rozas1,2 and R Enrıquez3 1 Faculty of Veterinary Sciences, Graduate School, Universidad Austral de Chile, Valdivia, Chile 2 Laboratory of Fish Pathology, Pathovet Ltd., Puerto Montt, Chile 3 Laboratory of Aquatic Pathology and Biotechnology, Faculty of Veterinary Sciences, Animal Pathology Institute, Universidad Austral de Chile, Valdivia, Chile prevention of and treatment for piscirickettsiosis Abstract are discussed. The bacterium Piscirickettsia salmonis is the aetio- Keywords: control, epidemiology, pathogenesis, logical agent of piscirickettsiosis a severe disease pathology, Piscirickettsia salmonis, piscirickettsiosis, that has caused major economic losses in the transmission. aquaculture industry since its appearance in 1989. Recent reports of P. salmonis or P. salmonis-like organisms in new fish hosts and geographical regions have increased interest in the bacterium. Introduction Because this gram-negative bacterium is still poorly understood, many relevant aspects of its Piscirickettsia salmonis was the first rickettsia-like life cycle, virulence and pathogenesis must be bacterium to be known as a fish pathogen (Fryer investigated before prophylactic procedures can be et al. 1992). Since the first reports of pisciricketts- properly designed. The development of effective iosis in Chile at the end of the 1980s, Piscirickett- control strategies for the disease has been limited sia-like bacteria have been frequently recognized due to a lack of knowledge about the biology, in various fish species farmed in fresh water and intracellular growth, transmission and virulence of sea water and have significantly affected the pro- the organism. Piscirickettsiosis has been difficult ductivity of aquaculture worldwide (Mauel & to control; the failure of antibiotic treatment is Miller 2002).
    [Show full text]
  • Proximal Composition and Fatty Acid Profile of Hemigrapsus
    Brazilian Journal of Biology https://doi.org/10.1590/1519-6984.231834 ISSN 1519-6984 (Print) Original Article ISSN 1678-4375 (Online) Proximal composition and fatty acid profile ofHemigrapsus crenulatus (H. Milne Edwards, 1837) as one of the main foods of “patagonian blenny”Eleginops maclovinus (Cuvier, 1830) G. Figueroa-Muñoza,b,c , P. De los Ríos-Escalanted,e , P. Dantagnana,f , C. Toledog , R. Oyarzúnh , L. Vargas-Chacoffh , C. Essei and R. Vega-Aguayoa,f* aUniversidad Católica de Temuco, Facultad de Recursos Naturales, Departamento de Ciencias Agropecuarias y Acuícolas, Temuco, Chile bIlustre Municipalidad de Cisnes, Puerto Cisnes, Chile cUniversidad de Concepción, Facultad de Ciencias Naturales y Oceanográficas, Departamento de Zoología, Genomics in Ecology, Evolution and Conservation Laboratory – GEECLAB, Concepción, Chile dUniversidad Católica de Temuco, Facultad de Recursos Naturales, Departamento de Ciencias Biológicas y Químicas, Temuco, Chile eUniversidad Católica de Temuco, Núcleo de Estudios Ambientales, Temuco, Chile fUniversidad Católica de Temuco, Núcleo de Investigación en Producción Alimentaria, Temuco, Chile gUniversidad Católica de Temuco, Facultad de Recursos Naturales, Programa de Doctorado en Ciencias Agropecuarias, Temuco, Chile hUniversidad Austral de Chile, Fondo de Financiamiento de Centros de Investigación en Áreas Prioritarias- FONDAP, Centro de Investigación Dinámica de Ecosistemas Marinos de Altas Latitudes-IDEAL, Instituto de Ciencias Marinas y Limnológicas, Valdivia, Chile iUniversidad Autónoma de Chile, Facultad de Arquitectura y Construcción, Instituto de Estudios del Hábitat – IEH, Unidad de Cambio Climático y Medio Ambiente – UCCMA, Temuco, Chile *e-mail: [email protected] Received: December 05, 2019 - Accepted: April 07, 2020 - Distributed: August 31, 2021 Abstract The Patagonian blenny (Eleginops maclovinus) is species endemic to South America with physiological characteristics that would facilitate its incorporation into Chilean aquaculture.
    [Show full text]
  • A Phylogenetic Perspective Ian A
    The Journal of Experimental Biology 206, 2595-2609 2595 © 2003 The Company of Biologists Ltd doi:10.1242/jeb.00474 Reduction in muscle fibre number during the adaptive radiation of notothenioid fishes: a phylogenetic perspective Ian A. Johnston1,*, Daniel A. Fernández1,†, Jorge Calvo2, Vera L. A. Vieira1, Anthony W. North3, Marguerite Abercromby1 and Theodore Garland, Jr4 1Gatty Marine Laboratory, Division of Environmental and Evolutionary Biology, School of Biology, University of St Andrews, St Andrews, Fife, KY16 8LB, Scotland, UK, 2Centro Austral de Investigaciones Cientificas (CADIC), Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET) CC92, Ushuaia, 9410, Tierra del Fuego, Argentina, 3British Antarctic Survey, High Cross, Madingley Road, Cambridge, CB3 OET, UK and 4Department of Biology, University of California, Riverside, CA 92521, USA *Author for correspondence (e-mail: [email protected]) †Present address: Biology Department, Wesleyan University, Hall-Atwater and Shanklin Laboratories, Middletown, 06459, CT, USA Accepted 30 April 2003 Summary The fish fauna of the continental shelf of the Southern nodes of the maximum likelihood phylogenetic tree were Ocean is dominated by a single sub-order of Perciformes, consistent with a progressive reduction in fibre number the Notothenioidei, which have unusually large diameter during part of the notothenioid radiation, perhaps serving skeletal muscle fibres. We tested the hypothesis that in fast to reduce basal energy requirements to compensate for the myotomal muscle a high maximum fibre diameter (FDmax) additional energetic costs of antifreeze production. For was related to a reduction in the number of muscle fibres example, FNmax in Chaenocephalus aceratus (12·700±300, present at the end of the recruitment phase of growth.
    [Show full text]
  • Fitting Together the Evolutionary Puzzle Pieces of the Immunoglobulin T Gene from Antarctic Fishes
    Preprints (www.preprints.org) | NOT PEER-REVIEWED | Posted: 27 November 2020 doi:10.20944/preprints202011.0685.v1 Article Fitting together the evolutionary puzzle pieces of the Immunoglobulin T gene from Antarctic fishes Alessia Ametrano1,2 Marco Gerdol3, Maria Vitale1,4, Samuele Greco3, Umberto Oreste1, Maria Rosaria Coscia1,* 1 Institute of Biochemistry and Cell Biology - National Research Council of Italy, 80131 Naples, Italy; [email protected] (A.A.); [email protected] (U.O.); [email protected] (M.R.C.) 2 Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, University of Campania Luigi Vanvitelli, 81100 Caserta, Italy; [email protected] (A.A.) 3 Department of Life Sciences, University of Trieste, 34127 Trieste, Italy; [email protected] (M.G.); [email protected] (S.G.) 1,4 Department of Molecular Medicine and Medical biotechnology, University of Naples Federico II, 80131 Naples, Italy (Present address); [email protected] (M.V.) * Correspondence: [email protected]; Tel.: +0039 081 6132556 (M.R.C.) Abstract: Cryonotothenioidea is the main group of fishes that thrive in the extremely cold Antarctic environment, thanks to the acquisition of peculiar morphological, physiological and molecular adaptations. We have previously disclosed that IgM, the main immunoglobulin isotype in teleosts, display typical cold-adapted features. Recently, we have analyzed the gene encoding the heavy chain constant region (CH) of the IgT isotype from the Antarctic teleost Trematomus bernacchii (family Nototheniidae), characterized by the near-complete deletion of the CH2 domain. Here, we aimed to track the loss of the CH2 domain along notothenioid phylogeny and to identify its ancestral origins.
    [Show full text]
  • The Hemoglobins of Sub-Antarctic Fishes of the Suborder Notothenioidei
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Elsevier - Publisher Connector Available online at www.sciencedirect.com Polar Science 4 (2010) 295e308 http://ees.elsevier.com/polar/ The hemoglobins of sub-Antarctic fishes of the suborder Notothenioidei Daniela Coppola a, Daniela Giordano a, Alessandro Vergara b, Lelio Mazzarella b, Guido di Prisco a, Cinzia Verde a, Roberta Russo a,* a Institute of Protein Biochemistry, CNR, Via Pietro Castellino 111, I-80131 Naples, Italy b Department of Chemistry, University of Naples ‘Federico II’, Complesso Universitario Monte S. Angelo, Via Cinthia, I-80126 Naples, Italy Received 16 December 2009; revised 19 April 2010; accepted 19 April 2010 Available online 12 May 2010 Abstract Fishes of the perciform suborder Notothenioidei provide an excellent opportunity for studying the evolution and functional importance of evolutionary adaptations to temperature. To understand the unique biochemical features of high-Antarctic noto- thenioids, it is important to improve our knowledge of these highly cold-adapted stenotherms with new information on their sub- Antarctic relatives. This paper focuses on the oxygen-transport system of two non-Antarctic species, Eleginops maclovinus and Bovichtus diac- anthus. Unlike most Antarctic notothenioids, the blood of E. maclovinus and B. diacanthus displays high hemoglobin (Hb) multiplicity. E. maclovinus, the sister group of Antarctic notothenioids, has one cathodal (Hb C) and two anodal components (Hb 1, Hb 2). B. diacanthus, one of the most northern notothenioids, has three major Hbs. The multiple Hbs may have been maintained as a response to temperature differences and fluctuations of temperate waters, much larger than in the Antarctic.
    [Show full text]
  • Amphipoda: Senticaudata: Podoceridae
    Boletín del Museo Nacional de Historia Natural, Chile, 64: 173-184 (2015) ESPECIE NUEVA DE PODOCERUS LEACH, 1814 (AMPHIPODA: SENTICAUDATA: PODOCERIDAE) Y REGISTROS NUEVOS DE OTROS ANFÍPODOS PARA CHILE Jorge Pérez-Schultheiss1,2 y Cynthia Vásquez1 1 Museo Nacional de Historia Natural, Área de Zoología, Interior Parque Quinta Normal s/n, Santiago, Chile. [email protected] 2 Departamento de Sistemática Animal, Centro de Estudios en Biodiversidad (CEBCh), Magallanes 1979, Osorno. urn:lsid:zoobank.org:pub:50437BAD-5209-4E66-9EA9-19D3BB8E2A39 RESUMEN Se describe una especie nueva de anfípodo de la familia Podoceridae con base en especímenes provenientes de la región de Aysén, sur de Chile y se reportan nuevas localidades para otras dos especies de las familias Ischyroceridae y Corophiidae. Podocerus chilensis n. sp. es similar a P. cristatus (Thomson, 1979) de Nueva Zelanda, con diferencias en caracteres de la mandíbula, el urópodo 1 del macho y el gnatópodo 2 en ambos sexos. El Ischyrocerido Jassa slatteryi Conlan, 1990, de amplia distribución mundial y conocido anteriormente de la zona central de Chile, extiende su distribución geográfica en el país hasta la región de Aysén, mientras que el Corophiido estuarino Paracorophium hartmannorum Andres, 1979 se reporta por primera vez como componente bentónico dulceacuícola en el sur de Chile, con base en ejemplares provenientes del Lago Llanquihue y rio Maullín, región de Los Lagos. Se incluye una clave taxonómica para el reconocimiento de las especies chilenas del genero Jassa. Palabras clave: Infraorden Corophiida, Podocerus chilensis n. sp., Jassa slatteryi, Paracorophium hartmannorum, nuevos registros, Chile. ABSTRACT New species of Podocerus Leach, 1814 (Amphipoda: Senticaudata: Podoceridae) and new records for other amphipods from Chile.
    [Show full text]
  • Cold Adaptation in Antarctic Notothenioids
    International Journal of Molecular Sciences Article Cold Adaptation in Antarctic Notothenioids: Comparative Transcriptomics Reveals Novel Insights in the Peculiar Role of Gills and Highlights Signatures of Cobalamin Deficiency Federico Ansaloni 1,2 , Marco Gerdol 1,* , Valentina Torboli 1, Nicola Reinaldo Fornaini 1,3, Samuele Greco 1 , Piero Giulio Giulianini 1 , Maria Rosaria Coscia 4, Andrea Miccoli 5 , Gianfranco Santovito 6 , Francesco Buonocore 5 , Giuseppe Scapigliati 5,† and Alberto Pallavicini 1,7,8,† 1 Department of Life Sciences, University of Trieste, 34127 Trieste, Italy; [email protected] (F.A.); [email protected] (V.T.); [email protected] (N.R.F.); [email protected] (S.G.); [email protected] (P.G.G.); [email protected] (A.P.) 2 International School for Advanced Studies, 34136 Trieste, Italy 3 Department of Cell Biology, Charles University, 12800 Prague, Czech Republic 4 Institute of Biochemistry and Cell Biology, National Research Council of Italy, 80131 Naples, Italy; [email protected] 5 Department for Innovation in Biological, Agro-Food and Forest Systems, University of Tuscia, 01100 Viterbo, Italy; [email protected] (A.M.); [email protected] (F.B.); [email protected] (G.S.) 6 Department of Biology, University of Padua, 35131 Padua, Italy; [email protected] 7 Anton Dohrn Zoological Station, 80122 Naples, Italy 8 National Institute of Oceanography and Experimental Geophysics, 34010 Trieste, Italy * Correspondence: [email protected] Citation: Ansaloni, F.; Gerdol, M.; † These authors contributed equally to this work. Torboli, V.; Fornaini, N.R.; Greco, S.; Giulianini, P.G.; Coscia, M.R.; Miccoli, A.; Santovito, G.; Buonocore, F.; et al.
    [Show full text]
  • Redalyc.Limnetic Feeding in Eleginops Maclovinus (Valenciennes, 1830)
    Interciencia ISSN: 0378-1844 [email protected] Asociación Interciencia Venezuela Pavés, Héctor; Pequeño, Germán; Bertrán, Carlos; Vargas, Luis Limnetic feeding in eleginops maclovinus (valenciennes, 1830) in the Valdivia River, Chile Interciencia, vol. 30, núm. 3, marzo, 2005, pp. 120-125 Asociación Interciencia Caracas, Venezuela Disponible en: http://www.redalyc.org/articulo.oa?id=33910202 Cómo citar el artículo Número completo Sistema de Información Científica Más información del artículo Red de Revistas Científicas de América Latina, el Caribe, España y Portugal Página de la revista en redalyc.org Proyecto académico sin fines de lucro, desarrollado bajo la iniciativa de acceso abierto LIMNETIC FEEDING IN Eleginops maclovinus (VALENCIENNES, 1830) IN THE VALDIVIA RIVER, CHILE HÉCTOR PAVÉS, GERMÁN PEQUEÑO, CARLOS BERTRÁN and LUIS VARGAS leginops maclovinus, Va- throughout its entire ontogenetic develop- mens were measured for total length (TL, lenciennes, 1830 is a ment. live) and standard length (SL) using a monotypic species of the In the present study the ruler graduated in millimeters. Weights family Eleginopidae (Osteichthyes), sub- trophic relations between juveniles and were obtained using a field balance order Notothenioidei. The species is adults of E. maclovinus within a limnetic graduated to 0.1g. At the laboratory, the thought to be of Antarctic evolutionary habitat, namely the upper Valdivia River fishes were initially fixed in 10% river origin, and is one of the most euryther- estuary, are compared. It was also tested water formalin for 48h and stored in 70% mic, euryhaline and stenobathic represen- whether E. maclovinus, the notothenioid ETOH. The stomachs were removed from tative of the suborder (Pequeño, 1989).
    [Show full text]
  • Hermaphroditism in Fish
    Tesis doctoral Evolutionary transitions, environmental correlates and life-history traits associated with the distribution of the different forms of hermaphroditism in fish Susanna Pla Quirante Tesi presentada per a optar al títol de Doctor per la Universitat Autònoma de Barcelona, programa de doctorat en Aqüicultura, del Departament de Biologia Animal, de Biologia Vegetal i Ecologia. Director: Tutor: Dr. Francesc Piferrer Circuns Dr. Lluís Tort Bardolet Departament de Recursos Marins Renovables Departament de Biologia Cel·lular, Institut de Ciències del Mar Fisiologia i Immunologia Consell Superior d’Investigacions Científiques Universitat Autònoma de Barcelona La doctoranda: Susanna Pla Quirante Barcelona, Setembre de 2019 To my mother Agraïments / Acknowledgements / Agradecimientos Vull agrair a totes aquelles persones que han aportat els seus coneixements i dedicació a fer possible aquesta tesi, tant a nivell professional com personal. Per començar, vull agrair al meu director de tesi, el Dr. Francesc Piferrer, per haver-me donat aquesta oportunitat i per haver confiat en mi des del principi. Sempre admiraré i recordaré el teu entusiasme en la ciència i de la contínua formació rebuda, tant a nivell científic com personal. Des del primer dia, a través dels teus consells i coneixements, he experimentat un continu aprenentatge que sens dubte ha derivat a una gran evolució personal. Principalment he après a identificar les meves capacitats i les meves limitacions, i a ser resolutiva davant de qualsevol adversitat. Per tant, el meu més sincer agraïment, que mai oblidaré. During the thesis, I was able to meet incredible people from the scientific world. During my stay at the University of Manchester, where I learned the techniques of phylogenetic analysis, I had one of the best professional experiences with Dr.
    [Show full text]
  • CABO DE HORNOS - DIEGO RAMÍREZ BIODIVERSIDAD Y PROPUESTA DE CONSERVACIÓN Julio Del 2017
    CABO DE HORNOS - DIEGO RAMÍREZ BIODIVERSIDAD Y PROPUESTA DE CONSERVACIÓN Julio del 2017 National Geographic Pristine Seas Waitt Foundation 2 COMO CITAR ESTE DOCUMENTO: Salinas-de-León P, Friedlander A, Ballesteros E, Henning B, Hune M, Sala E. 2017. Cabo de Hornos - Diego Ramírez. Biodiversidad y propuesta de conservación. Informe técnico para el Gobierno de Chile. National Geographic Pristine Seas, Washington, D.C. 79pp ÍNDICE DE CONTENIDOS RESUMEN EJECUTIVO . .4 INTRODUCCIÓN . 6 ECOSISTEMAS SUBMARINOS . .11 UN GRAN ECOSISTEMA PELÁGICO . 46 AMENAZAS . 50 NECESIDADES DE CONSERVACIÓN. .64 BIBLIOGRAFÍA . 67 ANEXOS . 74 4 RESUMEN EJECUTIVO Chile se ha convertido en un líder mundial en conservación al crear los dos parques marinos más grandes de América alrededor de islas oceánicas. Hoy el desafío es ampliar ese liderazgo para cubrir de manera representativa otros ecosistemas de Chile. La Región de Magallanes presenta una oportunidad única para crear el parque marino más grande e importante del Cono Sur en la zona de Cabo de Hornos y las islas Diego Ramírez. Los archipiélagos más australes del continente americano albergan un ecosistema marino- terrestre único e intacto. Su valor ecológico es irremplazable: ◾◾ Un ecosistema marino prístino de alta productividad. ◾◾ Los fondos costeros albergan extensos bosques de kelp, auténticas catedrales submarinas donde habitan innumerables especies como la centolla. ◾◾ El abundante krill, base de la cadena alimentaria, sostiene a pingüinos, sardinas y ballenas. ◾◾ Abundantes colonias de lobos marinos, elefantes marinos, y cientos de miles de aves marinas – incluyendo a especies amenazadas. ◾◾ Es la puerta natural de Chile a la Antártida. AMENAZAS ◾◾ La pesca industrial en la región ya ha sobreexplotado especies como el bacalo de profundidad, la merluza austral y la centolla.
    [Show full text]