DOCSLIB.ORG

Pangasianodon Hypophthalmus) in VIETNAM

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Pangasianodon Hypophthalmus) in VIETNAM EFFECTS OF TEMPERATURE AND SALINITY ON GROWTH PERFORMANCE IN CULTURED TRA CATFISH (Pangasianodon hypophthalmus) IN VIETNAM NGUYEN TRONG HONG PHUC Earth, Environmental and Biological Sciences Science and Engineering Faculty Queensland University of Technology Brisbane, Australia A thesis submitted in fulfilment of requirements for the degree of Doctor of Philosophy 2015 Keywords: Tra catfish, striped catfish, Pangasianodon hypophthalmus, climate change, aquaculture, temperature, salinity, growth performance, growth hormone, IGF-1, cortisol, osmotic pressure, plasma glucose concentration, hematological parameters, stress response, gene expression. STATEMENT OF ORIGINAL AUTHORSHIP The work contained in this thesis has not been submitted to meet requirements for an award at this or any other higher education institution. To the best of my knowledge and belief, the thesis contains no material previously published or written by another person except where due reference is made. QUT Verified Signature Nguyen Trong Hong Phuc July, 2015 WORKS PUBLISHED OR SUBMITTED FOR PUBLICATION BY THE AUTHOR INCORPORATED INTO THE THESIS Statement of Contribution to Jointly Authored Works in the Thesis 1. Nguyen, P. T. H., Do, H. T. T., Mather, P. B., & Hurwood, D. A. (2014). Experimental assessment of the effects of sublethal salinities on growth performance and stress in cultured tra catfish (Pangasianodon hypophthalmus). Fish Physiology and Biochemistry, Vol 40, 1839-1848. This manuscript is incorporated as chapter 2 of this thesis. The first author is responsible for the research, analysis and interpretation of data, and written work on this manuscript. The co-authors provide conceptual, logistical and editorial support. 2. Nguyen, T. H. P., Mather, P. B., Hurwood, D. A. (2015). Effects of temperatures on growth performance, hematological parameters and plasma IGF-1 level of tra catfish (Pangasianodon hypophthalmus). Journal of Thermal Biology, in review. This manuscript is incorporated as chapter 3 of this thesis. The first author is responsible for the research, analysis and interpretation of data, and written work on this manuscript. The co-authors provide conceptual, logistical and editorial support. 3. Nguyen, T. H. P., Duong, T. K. L., Mather, P. B., Hurwood, D. A. (2015). Effects of salinity, temperature and their interaction on growth performance, hematological and hormonal levels of tra catfish (Pangasianodon hypophthalmus). Aquaculture, in review. This manuscript is incorporated as chapter 4 of this thesis. The first author is responsible for the research, analysis and interpretation of data, and written work on this manuscript. The co-authors provide conceptual, logistical and editorial support. ACKNOWLEDGEMENTS First and foremost, my sincere thanks go to my supervisors Dr. David Hurwood and Prof. Peter Mather at the Science and Engineering Faculty, Queensland University of Technology (QUT), Australia for their supervision, advice, guidance and suggestion throughout the study programme and significant contribution to the planning and writing of the thesis and paper and also their friendly attitude. I am grateful to the Faculty of Aquaculture and Fisheries and Biotechnology Research and Development Institute of Can Tho University that offered facilities and technical assistances to conduct my studies. The research could not have been completed without the supports from my colleagues in the Faculty of Aquaculture and Fisheries and Biotechnology Research and Development Institute, their extensive assistances have been one of the most factors in the completion of this thesis. At the risk of offending the rest, I would like to name but a few: Prof. Nguyen Thanh Phuong, Assoc. Prof Do Thi Thanh Huong, Ms Nguyen Kim Ha, Mr. Do Tan Khang, Mr. Tran Van Be Nam, Ms Nguyen Loan Thao, Ms Tran Thi Kieu Linh, Ms Phan Vinh Thinh, Ms Nguyen Thanh Truc, Mr Nguyen Thanh Phong, Mr Nguyen Minh Tri, Ms Thi The Phuoc, Ms Tran Thanh Trang, Ms Huynh Thi Cam Tien for their supports for various aspects of this study. I would like to express my gratitude to the Australia Development Scholarship programme for providing a postgraduate scholarship for me to conduct research in Australia. The chance to do my PhD research in Australia has been one of the most valuable opportunities in my career and I therefore feel grateful to ADS and all the staff in the AusAID office at the QUT who provide me with necessary supports for my research and field works, supporting me in my efforts to complete this journey from the beginning till the end. I would like to give gratitude to my parents and my parents-in-law who always encourage me during a long period of study. On a personal note, I appreciate the sacrifices made by my wife, Duong Thi Kim Loan, to get me through this journey. Without her unconditional love and patient support during this time of period, there would be no thesis completed. And to my lovely daughter, Nguyen Phuc Minh Thu, with all of my heart. Abstract Tra catfish (Pangasianodon hypophthalmus) currently is the most important freshwater indigenous teleost cultured in the aquaculture sector in the Mekong River Delta (MRD) in Vietnam and it is now an icon of aquaculture development in Vietnam and globally. Over decades, the tra catfish industry has developed rapidly to a point where annual production now exceeds one million tonnes, employs nearly 200,000 rural poor, and resulted in export income of US$ 1.4 billion in 2010 (De Silva and Phuong, 2011). This industry however, has been identified as one that is likely to be impacted by predicted climate change scenarios because the MRD has been identified as among the top three most likely seriously affected regions around the world (IPCC, 2007). Predicted changes largely are related to water temperature increases caused by global warming and raised salinity caused by saline intrusion from sea level rise. The current situation highlights the need to assess potential effects of climate change on the tra catfish culture industry and to identify appropriate ways that will allow sustainable development of this important industry. The current study examined the responses of replicate cohorts of juvenile tra catfish to sublethal salinity and temperature change in three trials: (1) effects of raised sublethal salinities (freshwater, 2, 6, 10, 14 and 18‰); (2) effects of temperature levels (24, current ambient (27-28oC), 30, 32, 34, and 36oC); and (3) combined effects of temperature (25, 30, and 35oC) and salinity (freshwater, 6, and 12‰). Indicators for assessing effects of climate change on tra catfish performance included survival rate, growth performance, food conversion ratio, hormonal response (cortisol, growth hormone/IGF-1), osmoregulatory, plasma glucose and plasma ion concentrations, hematological parameters, and growth hormone gene expression patterns. Results of the first trial showed that tra catfish had high survival rates, better growth performance and better FCR values in a salinity range from freshwater to 10‰. Cortisol levels were elevated in the 14 and 18‰ treatments after 6 h and reached a peak after 24-h exposure, and this also led to increases in plasma glucose concentration. While fish in high salinity treatments did recover over a 14 days period, high salinity conditions had long- term negative effects on growth performance and FCR values. In trial 2, low temperature (24oC) significantly affected fish growth rate and FCR value while high sublethal i temperatures led to enhanced growth performance until 34oC where it peaked. Results of the 3rd trial showed that changes in temperature, salinity and their interaction had significant effects on individual growth rate and feed conversion efficiency of fish in the 35°C-6‰ treatment producing optimal conditions for growth while not producing significantly higher FCR values in comparison with a control treatment (freshwater - ambient temperature (25oC)). Tra catfish showed an effective capacity to acclimate successfully to changes in external environment factors (temperature and salinity), that included changing red blood cell count, hemoglobin concentration, metabolic rate, and energy mobilisation. Results of this study suggest that tra catfish can acclimate relatively easily to environmental conditions that have been predicted under current climate change models for the MRD. This provides strong indication that natural tra populations have the potential to adapt to higher salinity and temperature regimes relatively rapidly and therefore may persist successfully in the MRD for the long term. Furthermore, these data suggest that variation in genes underlying stress response to temperature and salinity that currently exist could facilitate development of culture strains that will perform well in the tra culture industry into the future. ii Notes on Thesis Preparation Chapters 2 to 4 of this thesis are presented as either published papers or as submitted manuscripts for publication. As such, there will be some necessary repetition of information in the General Introduction and General Discussion and Conclusions when compared against the Introductions and Discussions of individual data chapters. In Chapters 2 to 4, Figures and Tables in each chapter are re-initialized to maintain each chapter as an independent research paper. There is also some extra material that has been added to the data chapters that is relevant to the respective chapters but was not presented in the published papers/manuscripts. The reference list at the end of the thesis relates
Load more

Recommended publications
  • Variations Spatio-Temporelles De La Structure Taxonomique Et La Compétition Alimentaire Des Poissons Du Lac Tonlé Sap, Cambodge Heng Kong
    Variations spatio-temporelles de la structure taxonomique et la compétition alimentaire des poissons du lac Tonlé Sap, Cambodge Heng Kong To cite this version: Heng Kong. Variations spatio-temporelles de la structure taxonomique et la compétition alimentaire des poissons du lac Tonlé Sap, Cambodge. Ecologie, Environnement. Université Paul Sabatier - Toulouse III, 2018. Français. NNT : 2018TOU30122. tel-02277574 HAL Id: tel-02277574 https://tel.archives-ouvertes.fr/tel-02277574 Submitted on 3 Sep 2019 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. THÈSE En vue de l’obtention du DOCTORAT DE L’UNIVERSITE DE TOULOUSE Délivré par : Université Toulouse 3 Paul Sabatier (UT3 Paul Sabatier) Présentée et soutenue par : Heng KONG Le 03 Juilet 2018 Titre : Variations spatio-temporelles de la structure taxonomique et la compétition alimentaire des poissons du lac Tonlé Sap, Cambodge Ecole doctorale et discipline ou spécialité : ED SDU2E : Ecologie fonctionnelle Unité de recherche : Laboratoire Ecologie Fonctionnelle et Environnement (EcoLab) UMR 5245, CNRS –
    [Show full text]
  • Status of Taal Lake Fishery Resources with Emphasis on the Endemic Freshwater Sardine, Sardinella Tawilis (Herre, 1927)
    The Philippine Journal of Fisheries 25Volume (1): 128-135 24 (1-2): _____ January-June 2018 JanuaryDOI 10.31398/tpjf/25.1.2017C0017 - December 2017 Status of Taal Lake Fishery Resources with Emphasis on the Endemic Freshwater Sardine, Sardinella tawilis (Herre, 1927) Maria Theresa M. Mutia1,*, Myla C. Muyot1,, Francisco B. Torres Jr.1, Charice M. Faminialagao1 1National Fisheries Research and Development Institute, 101 Corporate Bldg., Mother Ignacia St., South Triangle, Quezon City ABSTRACT Assessment of fisheries in Taal Lake was conducted from 1996-2000 and 2008-2011 to know the status of the commercially important fishes with emphasis on the endemic freshwater sardine,Sardinella tawilis. Results of the fish landed catch survey in 11 coastal towns of the lake showed a decreasing fish harvest in the open fisheries from 1,420 MT to 460 MT in 1996 to 2011. Inventory of fisherfolk, boat, and gear also decreased to 16%, 7%, and 39%, respectively from 1998 to 2011. The most dominant gear is gill net which is about 53% of the total gear used in the lake with a declining catch per unit effort (CPUE) of 11kg/day to 4 kg/day from 1997 to 2011. Active gear such as motorized push net, ring net, and beach seine also operated in the lake with a CPUE ranging from 48 kg/day to 2,504 kg/day. There were 43 fish species identified in which S. tawilis dominated the catch for the last decade. However, its harvest also declined from 744 to 71 mt in 1996 to 2011. The presence of alien species such as jaguar fish, pangasius, and black-chinned tilapia amplified in 2009.
    [Show full text]
  • 10 Monograph Pangasius Djambal.Pdf
    Chheng P., Baran E., Touch B.T. 2004 Synthesis of all published information on catfish Pangasius djambal (“trey pra”) based on FishBase 2004. WorldFish Center and Inland Fisheries Research and Development Institute, Phnom Penh, Cambodia. 9 pp. Technical Assistance funded by the Asian Development Bank (TA nº T4025-CAM) Introduction This document results from the extraction and the editing by the authors of the information available in FishBase 2004. FishBase is a biological database on fishes developed by the WorldFish Center (formerly ICLARM, the International Center for Living Aquatic Resources Management) in collaboration with the Food and Agriculture Organization of the United Nations (FAO) and with the support of the European Commission (EC). These synopses present a standardized printout of the information on the above-mentioned species incorporated in FishBase as of 11 May 2004, is inspired from the format suggested for such documents by H. Rosa Jr. (1965, FAO Fish. Syn. (1) Rev 1, 84 p.). We cannot guarantee the total accuracy of the information herein; also we are aware that it is incomplete and readers are invited to send complementary information and/or corrections, preferably in form of reprints or reports to the FishBase Project, WorldFish Center, MC P.O. Box 2631, Makati, Metro Manila 0718, Philippines. Some hints on how to use the synopses The following definitions are meant to help you better understand the way this synopsis presents information and document its sources. Please refer to the FishBase book for more details; and do not hesitate to contact FishBase staff if you have suggestions or information that would improve the format or the contents of this synopsis.
    [Show full text]
  • Journal Template
    GSJ: VOLUME 6, ISSUE 7, JULY 2018 330 GSJ: Volume 6, Issue 7, July 2018, Online: ISSN 2320-9186 www.globalscientificjournal.com ANALYSIS OF CONSUMER ACCEPTANCE ON MARINATE WITH DIFFERENT TYPE OF FRESHWATER FISH Ranti Rahmadina, Eddy Afriyanto, Rosidah and Junianto Laboratory of Fisheries Processing Product, Padjadjaran University, Indonesia. E-mail: [email protected] KeyWords Keywords: Marinate, Salt, Golden Fish, Carp Fish, Catfish, Nile Fish, Organoleptic ABSTRACT The objective of this research is to sort the kind of fresh water fish by the likeness level of panelist on Marinade Processing. The research was started from February until March of 2018 in Laboratory of Fishery Processing, Faculty of Fishery and Marine, Padjadjaran University. The method which used in this research was Experimental Method by four ways, A) Salting of Golden Fish Fillet on 5% Saline Solution, B) Salting of Carp Fillet on 5% Saline Solution, C) Salting of Iridescent Shark Fillet on 5% Saline Solution, and D) Salting of Nile Fish Fillet on 5% Saline Solution. With Parameter based on Organoleptic Sense, which includes Sight (Visibility), Smell (Aroma), Touch (Texture), and Taste (Taste). The result showed that Marinated Fresh Water Fish was categorized to be liked by Panelist, but the most like one was The Marinated Nile Fish Product, based on the parameter such as Sight, Smell, Touch, and Taste. Marinated Nile Fish had white light, Solid and Tough Touch, Specific Smell without Putrid, lastly Salty and Crisp Taste. With all Median Value, 7 point of Sight, 7 point of Smell, 7 point of Touch, and 7 point of Taste.
    [Show full text]
  • Certain Frozen Fish Fillets Form the Socialist Republic of Vietnam
    A-552-801 POR: 8/1/17 - 7/31/18 Public Document E&C/OV: Team April 20, 2020 MEMORANDUM TO: Jeffrey I. Kessler Assistant Secretary for Enforcement and Compliance FROM: James Maeder Deputy Assistant Secretary for Antidumping and Countervailing Duty Operations SUBJECT: Certain Frozen Fish Fillets from the Socialist Republic of Vietnam: Issues and Decision Memorandum for the Final Results of the Fifteenth Antidumping Duty Administrative Review; 2017-2018 I. SUMMARY We analyzed the comments submitted by the petitioners,1 International Development and Investment Corporation (IDI), and NTSF Seafoods Joint Stock Company (NTSF) in the fifteenth administrative review of the antidumping duty (AD) order on certain frozen fish fillets (fish fillets) from the Socialist Republic of Vietnam (Vietnam). Based on our analysis of the comments received, we made changes to the margin calculations for the final results. We recommend that you approve the positions described in the “Discussion of the Issues” section of this memorandum. Comment 1: Whether to Calculate a Margin for NTSF Comment 2: Selection of Surrogate Country Comment 3: Applying Adverse Facts Available (AFA) to NTSF Vinh Long’s Farming Factors Comment 4: Surrogate Value (SV) for Movement Expenses Comment 5: Net-to-Gross-Weight Conversion for Movement Expenses Comment 6: Whether to Grant IDI a Separate Rate 1 The petitioners are: The Catfish Farmers of America and individual U.S. catfish processors America’s Catch, Inc., Alabama Catfish, LLC d/b/a Harvest Select Catfish, Inc., Consolidated Catfish Companies, LLC d/b/a Country Select Catfish, Delta Pride Catfish, Inc., Guidry’s Catfish, Inc., Heartland Catfish Company, Magnolia Processing, Inc.
    [Show full text]
  • A Draft Genome of the Striped Catfish, Pangasianodon Hypophthalmus, for Comparative Analysis of Genes Relevant to Development An
    Kim et al. BMC Genomics (2018) 19:733 https://doi.org/10.1186/s12864-018-5079-x RESEARCHARTICLE Open Access A draft genome of the striped catfish, Pangasianodon hypophthalmus, for comparative analysis of genes relevant to development and a resource for aquaculture improvement Oanh T. P. Kim1*† , Phuong T. Nguyen1†, Eiichi Shoguchi2†, Kanako Hisata2, Thuy T. B. Vo1, Jun Inoue2, Chuya Shinzato2,4, Binh T. N. Le1, Koki Nishitsuji2, Miyuki Kanda3, Vu H. Nguyen1, Hai V. Nong1 and Noriyuki Satoh2* Abstract Background: The striped catfish, Pangasianodon hypophthalmus, is a freshwater and benthopelagic fish common in the Mekong River delta. Catfish constitute a valuable source of dietary protein. Therefore, they are cultured worldwide, and P. hypophthalmus is a food staple in the Mekong area. However, genetic information about the culture stock, is unavailable for breeding improvement, although genetics of the channel catfish, Ictalurus punctatus, has been reported. Toacquiregenomesequencedataasausefulresourcefor marker-assisted breeding, we decoded a draft genome of P. hypophthalmus and performed comparative analyses. Results: Using the Illumina platform, we obtained both nuclear and mitochondrial DNA sequences. Molecular phylogeny using the mitochondrial genome confirmed that P. hypophthalmus is a member of the family Pangasiidae and is nested within a clade including the families Cranoglanididae and Ictaluridae. The nuclear genome was estimated at approximately 700 Mb, assembled into 568 scaffolds with an N50 of 14.29 Mbp, and was estimated to contain ~ 28,600 protein-coding genes, comparable to those of channel catfish and zebrafish. Interestingly, zebrafish produce gadusol, but genes for biosynthesis of this sunscreen compound have been lost from catfish genomes.
    [Show full text]
  • Imupro Complete Tests 270 Foods
    ImuPro Complete tests 270 foods: Cereals (with Gluten) Barley Goose Shrimp, prawn Gluten Hare Shark Kamut Lamb Sole Oats Ostrich meat Squid, cuttlefish Rye Pork Swordfish Spelt Quail Trout Wheat Rabbit Tunafish Roe deer Zander Turkey hen Alternatives to Cereals Veal Egg Wild boar Amaranth Arrowroot Chicken egg Fish & Seafood Buckwheat Chicken egg-white Carob Chicken yolk Cassava Anchovy Goose egg Fonio Angler, monkfish Quail eggs Jerusalem artichoke Blue mussels Lupine Carp Milk products Maize, sweet corn Cod, codling Crayfish Millet Camel's milk Eel Quinoa Goat milk and cheese Gilthead bream Rice Halloumi Haddock Sweet chestnut Kefir Hake Sweet potato Mare‘s milk Halibut Tapioca, cassava Milk cooked Herring Teff Milk (cow) Iridescent shark Ricotta Lobster Rennet cheese (cow) Mackerel Meat Sheep milk and cheese Ocean perch Sour-milk products (cow) Octopus Beef Oysters Chicken Plaice Deer Pollock Duck Red Snapper Goat meat Sardine Salmon Scallop Sea bass ImuPro Complete tests 270 foods: Vegetables Salads Artichoke Butterhead lettuce Cherry Asparagus Chicory Cranberry Aubergine Dandelion Currant Bamboo shoots Endive Date Beetroot Iceberg lettuce Fig Broccoli Lamb‘s lettuce Gooseberry Brussels sprouts Lollo rosso Grape Carrots Radicchio Grapefruit Cauliflower Rocket Guava Celeriac, knob celery Romaine / cos lettuce Honeydew melon Chard, beet greens Kiwi Lemon Chili Cayenne Legumes Chili Habanero Lime Chili Jalapeno
    [Show full text]
  • Summary Report of Freshwater Nonindigenous Aquatic Species in U.S
    Summary Report of Freshwater Nonindigenous Aquatic Species in U.S. Fish and Wildlife Service Region 4—An Update April 2013 Prepared by: Pam L. Fuller, Amy J. Benson, and Matthew J. Cannister U.S. Geological Survey Southeast Ecological Science Center Gainesville, Florida Prepared for: U.S. Fish and Wildlife Service Southeast Region Atlanta, Georgia Cover Photos: Silver Carp, Hypophthalmichthys molitrix – Auburn University Giant Applesnail, Pomacea maculata – David Knott Straightedge Crayfish, Procambarus hayi – U.S. Forest Service i Table of Contents Table of Contents ...................................................................................................................................... ii List of Figures ............................................................................................................................................ v List of Tables ............................................................................................................................................ vi INTRODUCTION ............................................................................................................................................. 1 Overview of Region 4 Introductions Since 2000 ....................................................................................... 1 Format of Species Accounts ...................................................................................................................... 2 Explanation of Maps ................................................................................................................................
    [Show full text]
  • Employing Geographical Information Systems in Fisheries Management in the Mekong River: a Case Study of Lao PDR
    Employing Geographical Information Systems in Fisheries Management in the Mekong River: a case study of Lao PDR Kaviphone Phouthavongs A thesis submitted in partial fulfilment of the requirement for the Degree of Master of Science School of Geosciences University of Sydney June 2006 ABSTRACT The objective of this research is to employ Geographical Information Systems to fisheries management in the Mekong River Basin. The study uses artisanal fisheries practices in Khong district, Champasack province Lao PDR as a case study. The research focuses on integrating indigenous and scientific knowledge in fisheries management; how local communities use indigenous knowledge to access and manage their fish conservation zones; and the contribution of scientific knowledge to fishery co-management practices at village level. Specific attention is paid to how GIS can aid the integration of these two knowledge systems into a sustainable management system for fisheries resources. Fieldwork was conducted in three villages in the Khong district, Champasack province and Catch per Unit of Effort / hydro-acoustic data collected by the Living Aquatic Resources Research Centre was used to analyse and look at the differences and/or similarities between indigenous and scientific knowledge which can supplement each other and be used for small scale fisheries management. The results show that GIS has the potential not only for data storage and visualisation, but also as a tool to combine scientific and indigenous knowledge in digital maps. Integrating indigenous knowledge into a GIS framework can strengthen indigenous knowledge, from un processed data to information that scientists and decision-makers can easily access and use as a supplement to scientific knowledge in aquatic resource decision-making and planning across different levels.
    [Show full text]
  • (Monogenea: Dactylogyridae) and a Redescription of D
    Journal of Helminthology (2018) 92, 228–243 doi:10.1017/S0022149X17000256 © Cambridge University Press 2017 Morphology and molecular characterization of Demidospermus spirophallus n. sp., D. prolixus n. sp. (Monogenea: Dactylogyridae) and a redescription of D. anus in siluriform catfish from Brazil L. Franceschini1*, A.C. Zago1, M.I. Müller1, C.J. Francisco1, R.M. Takemoto2 and R.J. da Silva1 1São Paulo State University (Unesp), Institute of Biosciences, Botucatu, Brazil, CEP 18618-689: 2State University of Maringá (UEM), Limnology, Ichthyology and Aquaculture Research Center (Nupélia), Maringá, Brazil, CEP 87020-900 (Received 29 September 2016; Accepted 26 February 2017; First published online 6 April 2017) Abstract The present study describes Demidospermus spirophallus n. sp. and Demidosper- mus prolixus n. sp. (Monogenea, Dactylogyridae) from the siluriform catfish Loricaria prolixa Isbrücker & Nijssen, 1978 (Siluriformes, Loricariidae) from the state of São Paulo, Brazil, supported by morphological and molecular data. In add- ition, notes on the circumscription of the genus with a redescription of Demisdospermus anus are presented. Demidospermus spirophallus n. sp. differed from other congeners mainly because of the morphology of the male copulatory organ (MCO), which exhibited 2½ counterclockwise rings, a tubular accessory piece with one bifurcated end and a weakly sclerotized vagina with sinistral open- ing. Demidospermus prolixus n. sp. presents a counterclockwise-coiled MCO with 1½ rings, an ovate base, a non-articulated groove-like accessory piece serving as an MCO guide, two different hook shapes, inconspicuous tegumental annulations, a non-sclerotized vagina with sinistral opening and the absence of eyes or acces- sory eyespots. The present study provides, for the first time, molecular character- ization data using the partial ribosomal gene (28S) of two new species of Demidospermus from Brazil (D.
    [Show full text]
  • DIAGNOSTIC and DESCRIPTION of ASIAN PANGASIID CATFISH GENUS Helicophagus from SOUTHEAST ASIA
    Diagnostic and Description of Asian Pangasiids……..from South East Asia (Gustiano, R., et al) Available online at: http://ejournal-balitbang.kkp.go.id/index.php/ifrj e-mail:[email protected] INDONESIAN FISHERIES RESEARCH JOURNAL Volume 25 Nomor 2 December 2019 p-ISSN: 0853-8980 e-ISSN: 2502-6569 Accreditation Number RISTEKDIKTI: 21/E/KPT/2018 DIAGNOSTIC AND DESCRIPTION OF ASIAN PANGASIID CATFISH GENUS Helicophagus FROM SOUTHEAST ASIA Rudhy Gustiano*1, M. H. Fariduddin Ath-thar1, Vitas Atmadi Prakoso1, Deni Radona1 and Irin Iriana Kusmini1 Institute for Freshwater Aquaculture Research and Fisheries Extension (BRPBATPP), Jl. Sempur No 1, Bogor, West Java, Indonesia 16129 Received; April 18-2019 Received in revised from September 27-2019; Accepted October 12-2019 ABSTRACT Pangasiid catfishes is an economic important catfish family for fishery. Nowadays, three species, Pangasius hypophtahlmus, P. boucorti, and P. djambal, are used in aquaculture. Among the genera in Pangasiidae, Helicophagus was less studied. Although this genus was less preferred than other popular species in Pangasiidae, it still has high commercial price. The present study was conducted to clarify the differences of the exist species in the genus Helicophagus based on biometric analyses. Twenty six specimens, collected from represent rivers in Southeast Asia, used for the material examined. Several type specimens deposited in museums were also added in the analyses. Thirty five characters were designed for measurement on the unique body conformation. Principal component analysis (PCA) was applied to distinguish different species and found strong characters for key identification and description. The results presented the data and information on the diagnosis, description, distribution, and ecology of each species.
    [Show full text]
  • State of the Amazon: Freshwater Connectivity and Ecosystem Health WWF LIVING AMAZON INITIATIVE SUGGESTED CITATION
    REPORT LIVING AMAZON 2015 State of the Amazon: Freshwater Connectivity and Ecosystem Health WWF LIVING AMAZON INITIATIVE SUGGESTED CITATION Macedo, M. and L. Castello. 2015. State of the Amazon: Freshwater Connectivity and Ecosystem Health; edited by D. Oliveira, C. C. Maretti and S. Charity. Brasília, Brazil: WWF Living Amazon Initiative. 136pp. PUBLICATION INFORMATION State of the Amazon Series editors: Cláudio C. Maretti, Denise Oliveira and Sandra Charity. This publication State of the Amazon: Freshwater Connectivity and Ecosystem Health: Publication editors: Denise Oliveira, Cláudio C. Maretti, and Sandra Charity. Publication text editors: Sandra Charity and Denise Oliveira. Core Scientific Report (chapters 1-6): Written by Marcia Macedo and Leandro Castello; scientific assessment commissioned by WWF Living Amazon Initiative (LAI). State of the Amazon: Conclusions and Recommendations (chapter 7): Cláudio C. Maretti, Marcia Macedo, Leandro Castello, Sandra Charity, Denise Oliveira, André S. Dias, Tarsicio Granizo, Karen Lawrence WWF Living Amazon Integrated Approaches for a More Sustainable Development in the Pan-Amazon Freshwater Connectivity Cláudio C. Maretti; Sandra Charity; Denise Oliveira; Tarsicio Granizo; André S. Dias; and Karen Lawrence. Maps: Paul Lefebvre/Woods Hole Research Center (WHRC); Valderli Piontekwoski/Amazon Environmental Research Institute (IPAM, Portuguese acronym); and Landscape Ecology Lab /WWF Brazil. Photos: Adriano Gambarini; André Bärtschi; Brent Stirton/Getty Images; Denise Oliveira; Edison Caetano; and Ecosystem Health Fernando Pelicice; Gleilson Miranda/Funai; Juvenal Pereira; Kevin Schafer/naturepl.com; María del Pilar Ramírez; Mark Sabaj Perez; Michel Roggo; Omar Rocha; Paulo Brando; Roger Leguen; Zig Koch. Front cover Mouth of the Teles Pires and Juruena rivers forming the Tapajós River, on the borders of Mato Grosso, Amazonas and Pará states, Brazil.
    [Show full text]