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Catch and Culture Aquaculture - Environment
Aquaculture Catch and Culture Aquaculture - Environment Fisheries and Environment Research and Development in the Mekong Region Volume 25, No 1 ISSN 0859-290X April 2019 INSIDE l US-Cambodian-Japanese venture launches $70 mln wildlife project l Thai exhibition highlights fisheries based on Mekong species l Vietnam company breaks ground on ambitious catfish farm l Redesigning the Xayaburi hydropower project l Forecasts see 70 to 80 pct chance of El Nino developing l American soybean farmers launch fish feed project in Cambodia April 2019 Catch and Culture - Environment Volume 25, No. 1 1 Aquaculture Catch and Culture - Environment is published three times a year by the office of the Mekong River Commission Secretariat in Vientiane, Lao PDR, and distributed to over 650 subscribers around the world. The preparation of the newsletter is facilitated by the Environmental Management Division of the MRC. Free email subscriptions are available through the MRC website, www.mrcmekong.org. For information on the cost of hard-copy subscriptions, contact the MRC’s Documentation Centre at [email protected]. Contributions to Catch and Culture - Environment should be sent to [email protected] and copied to [email protected]. © Mekong River Commission 2019 Editorial Panel: Tran Minh Khoi, Director of Environmental Management Division So Nam, Chief Environmental Management Officer Phattareeya Suanrattanachai, Fisheries Management Specialist Prayooth Yaowakhan, Ecosystem and Wetland Specialist Nuon Vanna, Fisheries and Aquatic Ecology Officer Dao Thi Ngoc Hoang, Water Quality Officer Editor: Peter Starr Designer: Chhut Chheana Associate Editor: Michele McLellan The opinions and interpretation expressed within are those of the authors and do not necessarily represent the views of the Mekong River Commission. -
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Distribution and Ecology of Some Important Riverine Fish Species of the Mekong River Basin Mekong River Commission Distribution and Ecology of Some Important Riverine Fish Species of the Mekong River Basin A.F. Poulsen, K.G. Hortle, J. Valbo-Jorgensen, S. Chan, C.K.Chhuon, S. Viravong, K. Bouakhamvongsa, U. Suntornratana, N. Yoorong, T.T. Nguyen, and B.Q. Tran. Edited by K.G. Hortle, S.J. Booth and T.A.M. Visser MRC 2004 1 Distribution and Ecology of Some Important Riverine Fish Species of the Mekong River Basin Published in Phnom Penh in May 2004 by the Mekong River Commission. This document should be cited as: Poulsen, A.F., K.G. Hortle, J. Valbo-Jorgensen, S. Chan, C.K.Chhuon, S. Viravong, K. Bouakhamvongsa, U. Suntornratana, N. Yoorong, T.T. Nguyen and B.Q. Tran. 2004. Distribution and Ecology of Some Important Riverine Fish Species of the Mekong River Basin. MRC Technical Paper No. 10. ISSN: 1683-1489 Acknowledgments This report was prepared with financial assistance from the Government of Denmark (through Danida) under the auspices of the Assessment of Mekong Fisheries Component (AMCF) of the Mekong River Fisheries Programme, and other sources as acknowledged. The AMCF is based in national research centres, whose staff were primarily responsible for the fieldwork summarised in this report. The ongoing managerial, administrative and technical support from these centres for the MRC Fisheries Programme is greatly appreciated. The centres are: Living Aquatic Resources Research Centre, PO Box 9108, Vientiane, Lao PDR. Department of Fisheries, 186 Norodom Blvd, PO Box 582, Phnom Penh, Cambodia. -
Fish Species Composition and Catch Per Unit Effort in Nong Han Wetland, Sakon Nakhon Province, Thailand
Songklanakarin J. Sci. Technol. 42 (4), 795-801, Jul. - Aug. 2020 Original Article Fish species composition and catch per unit effort in Nong Han wetland, Sakon Nakhon Province, Thailand Somsak Rayan1*, Boonthiwa Chartchumni1, Saifon Kaewdonree1, and Wirawan Rayan2 1 Faculty of Natural Resources, Rajamangala University of Technology Isan, Sakon Nakhon Campus, Phang Khon, Sakon Nakhon, 47160 Thailand 2 Sakon Nakhon Inland Fisheries Research and Development Center, Mueang, Sakon Nakhon, 47000 Thailand Received: 6 August 2018; Revised: 19 March 2019; Accepted: 17 April 2019 Abstract A study on fish species composition and catch per unit effort (CPUE) was conducted at the Nong Han wetland in Sakon Nakhon Province, Thailand. Fish were collected with 3 randomized samplings per season at 6 stations using 6 sets of gillnets. A total of 45 fish species were found and most were in the Cyprinidae family. The catch by gillnets was dominated by Parambassis siamensis with an average CPUE for gillnets set at night of 807.77 g/100 m2/night. No differences were detected on CPUE between the seasonal surveys. However, the CPUEs were significantly different (P<0.05) between the stations. The Pak Narmkam station had a higher CPUE compared to the Pak Narmpung station (1,609.25±1,461.26 g/100 m2/night vs. 297.38±343.21 g/100 m2/night). The results of the study showed that the Nong Han Wetlands is a lentic lake and the fish abundance was found to be medium. There were a few small fish species that could adapt to living in the ecosystem. Keywords: fish species, fish composition, abundance, CPUE, Nong Han wetland 1. -
Marketing Infrastructure, Distribution Channels and Trade Pattern of Inland Fisheries Resources Cambodia: an Exploratory Study
Marketing Infrastructure, Distribution Channels and Trade Pattern of Inland Fisheries Resources Cambodia: An Exploratory Study Mohammed A. Rab Hap Navy Seng Leang Mahfuzuddin Ahmed Katherine Viner WorldFish C E N T E R The WorldFish Center Batu Maung, Penang Malaysia Contents Executive Summary .................................................................................................................................... 4 1. Introduction ................................................................................................................................................. 5 2. Objectives ................................................................................................................................................... 8 3. Research Methods ....................................................................................................................................... 9 3.1. Study Area .................................................................................................................................... 9 3.2. Sample Selection and Data Collection ......................................................................................... 9 4. Market Infrastructure .................................................................................................................................. 11 4.1. Description of Landing Sites ........................................................................................................ 11 4.2. Quantity and Price of Fish at Landing Sites ................................................................................ -
The Impacts of Introduced Freshwater Fishes in the Philippines
6/2/2014 RAFAEL D. GUERRERO III, Ph.D. ACADEMICIAN NATIONAL ACADEMY OF SCIENCE AND TECHNOLOGY, PHILIPPINES This presentation is an output of the Research Fellowship Grant awarded by the NAST conducted in 2012-2013. 1 6/2/2014 What are introduced freshwater fishes? - Exotic, foreign, non-native or alien fishes thriving in freshwater environments (e.g., lakes, rivers, ponds) - Transported by man from one country to another or from one body of freshwater to another intentionally or accidentally What are invasive fishes? - Fishes that cause harm to the environment, people and the economy Why freshwater fishes are introduced: (1) Economic reasons - for food production through aquaculture (fish farming) or inland fisheries enhancement (e.g., tilapia, carps, gouramis) (2) Recreational purpose - for ornamental/aquarium fish (e.g., goldfish) or sport fishing (e.g., large mouth bass) (3) Mosquito control Ex. mosquito fishes, guppies 2 6/2/2014 The Impacts of Introduced Freshwater Fishes (1) Positive (Beneficial) a. Economic and social benefits - Increased fish production through aquaculture and inland fisheries enhancement FAO DIAS : (a) most introductions were for aquaculture (b) “…more positive socio- economic benefits than negative ecological impacts” b. Ecological benefits - Introduced fishes have filled available niches in the ecosystem (Ex. planktivores and omnivores) (2) Negative (Harmful) a. Ecological loss of biodiversity Ex. Introduction of white goby and eleotrid from Lake Mainit to Lake Lanao in Mindanao caused the loss of 15 endemic cyprinids. b. Economic and social losses Ex. “Knife fish” in Laguna de Bay c. Environmental degradation Ex. “Janitor fish” in Marikina River d. Genetic pollution Ex. “Uncontrolled hybridization and introgression” (Mooney and Cleland, 2001) e. -
Length-Weight Relationship and Condition Factor of Silver Therapon, Leiopotherapon Plumbeus (Terapontidae) from Two Brackishwater Habitats 1Dionisia A
Length-weight relationship and condition factor of silver therapon, Leiopotherapon plumbeus (Terapontidae) from two brackishwater habitats 1Dionisia A. Santos, 1Adrian D. C. Manliclic, 1,2Mark N. C. Corpuz 1 Institute of Fisheries and Aquatic Sciences, Center for Research on Aquaculture and Aquatic Resources in Brackishwater Systems, Bataan Peninsula State University, Bayan, Bataan, Philippines; 2 School of Environmental Science and Management, University of the Philippines Los Baños, Los Baños, Philippines. Corresponding author: M. N. C. Corpuz, [email protected] Abstract. This study evaluated the length-weight relationship, (W = aTLb) and condition factor dynamics [K = W/(aTLb)] of endemic silver therapon (Leiopotherapon plumbeus, Kner 1864) based on measurements from specimens collected in two brackish water habitats. Fish specimens were collected from fishponds located in Sampalucan, Orani, Bataan (n=500), and in Almacen river (n=380) in Hermosa, Bataan. Length and weight was affected by sex, sites and seasons. The sexual variation in growth rate as inferred by the length-weight relationship was significant, with females being positively allometric (b=3.11), whilst males were negatively allometric (b=2.88). Spatial variation in growth rate was significant between Sampalucan (b=3.07) and Almacen (b=3.02) despite of both being isometric. The growth coefficient in the wet season displayed isometry (b=3.05), whereas in the dry season, it was negatively allometric (b=2.71). The K values were close to the ideal score of 1. The mean condition factor was significantly influenced by sex (1.023±0.015 for females; 0.949±0.006 for males), sampling sites (0.991±0.005 in Sampalucan; 0.983±0.007 in Almacen), and season (1.017±0.008 in the wet season; 0.974±0.014 in the dry season). -
Impacts of Introduced Freshwater Fishes in the Philippines (1905-2013): a Review and Recommendations
Philippine Journal of Science 143 (1): 49-59, June 2014 ISSN 0031 - 7683 Date Received: 06 January 2014 Impacts of Introduced Freshwater Fishes in the Philippines (1905-2013): A Review and Recommendations Rafael D. Guerrero III National Academy of Science and Technology, Philippines Philippine Heritage Center, DOST Compound, Metro Manila, Philippines Based on existing records and observations, 62 freshwater fishes were introduced from 1905 to 2013 in the Philippines for aquaculture (45%), ornamental purpose (42%), recreational fishing (6%), and mosquito control (6%). An evaluation showed that 48 (77%) of the fishes are beneficial, 10 (16%) are invasive, and 4 (6%) are potentially invasive. In terms of of economic benefits, the gains derived from the introduction of beneficial fishes, particularly for culture and fisheries enhancement, are much more compared to the economic losses due to the negative impacts of invasive fishes. A review of the national policies and regulations on the introduction of imported live fishes showed that the required processes are adequate and in place. However, there are gaps that need to be urgently addressed to strengthen monitoring, surveillance and control to prevent the spread of the six invasive ornamental fishes now established in inland waters and to forestall the escapes of the potentially invasive fishes. Key Words: Alien species, Aquaculture, Exotic species, Fisheries, Introductions, Invasive species INTRODUCTION biological diversity.” With globalization, the transport of plants and animals Introduced aquatic species may have environmental, from one country to another through human intervention social and economic impacts. Species introductions can has been facilitated. The intentional or unintentional improve production and economic benefits from fisheries introduction of living organisms for economic and other and aquaculture. -
Are Genetic Reference Libraries Sufficient for Environmental DNA
water Article Are Genetic Reference Libraries Sufficient for Environmental DNA Metabarcoding of Mekong River Basin Fish? Christopher L. Jerde 1,* , Andrew R. Mahon 2, Teresa Campbell 3 , Mary E. McElroy 4, Kakada Pin 5 , Jasmine N. Childress 6, Madeline N. Armstrong 2, Jessica R. Zehnpfennig 2, Suzanne J. Kelson 3, Aaron A. Koning 3, Peng Bun Ngor 5 , Vanna Nuon 7,8, Nam So 5,7, Sudeep Chandra 3 and Zeb S. Hogan 3 1 Marine Science Institute, University of California Santa Barbara, Santa Barbara, CA 93106, USA 2 Department of Biology, Central Michigan University, Mount Pleasant, MI 48859, USA; [email protected] (A.R.M.); [email protected] (M.N.A.); [email protected] (J.R.Z.) 3 Department of Biology and Global Water Center, University of Nevada, Reno, NV 89557, USA; [email protected] (T.C.); [email protected] (S.J.K.); [email protected] (A.A.K.); [email protected] (S.C.); [email protected] (Z.S.H.) 4 Interdepartmental Graduate Program in Marine Science, University of California, Santa Barbara, CA 93106, USA; [email protected] 5 Wonders of the Mekong Project, c/o Inland Fisheries Research and Development Institute, Fisheries Administration, No. 186, Preah Norodom Blvd., Khan Chamcar Morn, P.O. Box 582, Phnom Penh 12300, Cambodia; [email protected] (K.P.); [email protected] (P.B.N.); [email protected] (N.S.) 6 Department of Ecology, Evolution, and Marine Biology, University of California, Santa Barbara, CA 93106, USA; [email protected] 7 Mekong River Commission Secretariat, P.O. Box 6101, 184 Fa Ngoum Road, Unit 18, Vientiane 01000, Laos; [email protected] Citation: Jerde, C.L.; Mahon, A.R.; 8 Cambodia National Mekong Committee, No. -
Ikan Pipih Yang Potensial Untuk Ikan Hias (Sudarto)
Ikan pipih yang potensial untuk ikan hias (Sudarto) IKAN PIPIH YANG POTENSIAL UNTUK IKAN HIAS Sudarto Balai Riset Budidaya Ikan Hias Jl. Perikanan No. 13, Pancoran Mas, Depok E-mail: [email protected] dengan ikan lain maka golongan ikan ini bersifat tenang ABSTRAK (kalem). Dijumpai dari 25° lintang utara sampai 12° lintang selatan, dan 18° bujur barat hingga 119° bujur timur. Ikan belida dikenal sebagai ikan konsumsi yang Etymologi nama famili ini dari bahasa Yunani, noton sama dijadikan bahan makanan seperti pempek dan dengan belakang + , pteron sama dengan sayap, sirip. kerupuk Palembang, sedangkan di Kalimantan dikenal sebagai ikan pipih. Sistematika ikan ini Taksonomi famili Notopteridae adalah: banyak mengalami perubahan atau perbaikan. Ikan z Domain : Eukaryota ini termasuk famili Notopteridae yang terdiri atas z Kingdom : Animalia 3 genus, 2 genus terdapat di Indonesia yaitu z Subkingdom : Bilateria Notopterus dan Chitala. Selain itu, anak-anak ikan ini dijual sebagai ikan hias. Pengembangbiakannya z Branch : Deuterostomia di luar habitat sudah berhasil dan saat ini dalam z Infrakingdom : Chordonia proses peningkatan produksinya. Ikan ini hidup di z Phylum : Chordata sungai-sungai besar di Sumatera, Kalimantan, dan z Subphylum : Vertebrata Jawa. z Infraphylum : Gnathostomata KATA KUNCI: ikan pipih, belida z Superclass : Osteichthyes z Class : Osteichthyes z Subclass : Actinopterygii PENDAHULUAN z Infraclass : Actinopteri z Order : Osteoglossiformes Walaupun ikan pipih atau ikan belida termasuk famili Notopteridae dikenal sebagai ikan konsumsi dan diolah z Suborder : Notopteroidei menjadi berbagai jenis makanan, tetapi ikan ini juga z Family : Notopteridae mempunyai potensi untuk dijadikan ikan hias (Roberts, GENUS Chitala 1989). Umumnya merupakan ikan yang hidup di air tawar; kadang-kadang dijumpai di air payau. -
Catch and Culture Aquaculture - Environment
Aquaculture Catch and Culture Aquaculture - Environment Fisheries and Environment Research and Development in the Mekong Region Volume 25, No 3 ISSN 0859-290X December 2019 INSIDE l New State of the Basin Report l State of the Upper Mekong Basin l Alarming decline in Mekong sediment l Mekong sand mining l Using drones in fisheries science l Bioplastic bags from fish waste l Educational Supplement: Fish body parts December 2019 Catch and Culture - Environment Volume 25, No. 3 1 Aquaculture Catch and Culture - Environment is published three times a year by the office of the Mekong River Commission Secretariat in Vientiane, Lao PDR, and distributed to over 650 subscribers around the world. The preparation of the newsletter is facilitated by the Environmental Management Division of the MRC. Free email subscriptions are available through the MRC website, www.mrcmekong.org. For information on the cost of hard-copy subscriptions, contact the MRC’s Documentation and Learning Centre at [email protected]. Contributions to Catch and Culture - Environment should be sent to [email protected] and copied to [email protected]. © Mekong River Commission 2019 Editorial Panel: Hak Socheat, Director of Environmental Management Division So Nam, Chief Environmental Management Officer Phattareeya Suanrattanachai, Fisheries Management Specialist Prayooth Yaowakhan, Ecosystem and Wetland Specialist Nuon Vanna, Fisheries and Aquatic Ecology Officer Dao Thi Ngoc Hoang, Water Quality Officer Editor: Peter Starr Designer: Chhut Chheana Associate editor: Michele McLellan The opinions and interpretation expressed within are those of the authors and do not necessarily represent the views of the Mekong River Commission. The MRC is funded by contributions from its member countries and development partners of Australia, Belgium, the European Union, Finland, France, Germany, Japan, Luxembourg, the Netherlands, Sweden, Switzerland, the United States and the World Bank. -
Acute Salinity Tolerance of Silver Therapon, Leiopotherapon Plumbeus 1,2Mark Nell C
Acute salinity tolerance of silver therapon, Leiopotherapon plumbeus 1,2Mark Nell C. Corpuz, 1Adrian Deil C. Manliclic 1 Institute of Fisheries and Aquatic Sciences, Center for Research on Aquaculture and Aquatic Resources in Brackishwater Systems, Bataan Peninsula State University, Bayan, Bataan, Philippines; 2 School of Environmental Science and Management, University of the Philippines Los Baños, Los Baños, Philippines. Corresponding author: A. D. C. Manliclic, [email protected] Abstract. Despite the ecological and economic importance of silver therapon (Leiopotherapon plumbeus (Kner, 1864)), there is still no information regarding the salinity tolerance of this endemic freshwater terapontid. The present study evaluated the acute salinity tolerance of silver therapon. Salinity toxicity test (LC50 at 96 h) determined the toxicity limit of 315 unsexed L. plumbeus (4.39±0.39 cm) using seven -1 salinity treatments (0, 7.5, 15, 20, 25, 30, and 35 g L ). Using the graphical method, LC50 projected -1 salinity toxicity of approximately 29.92 g L , albeit Probit analysis estimated a mean LC50 of about 30.70 -1 -1 -1 g L . After 96 h, 0, and 7.5 g L salinity treatments obtained zero mortality, whilst 15, 20, and 25 g L acquired < 7% mortality. Mortality rates of 51.11% and 62.22% were recorded at 24 h in treatments 30 g L-1, and 35 g L-1, respectively. Log-rank analysis of the Kaplan-Meier function determined the significant difference of sample survival times in different salinity concentrations (X2 = 123.76), with an apparent decrease in survival rate that occurred in 30 g L-1 salinity. -
T He Featherback Family, Notopteridae, Is One of the Most Conspicuous Groups of Fish in the Mekong. the Peculiar Knife-Shaped B
ISSN 0859-290X, Vol. 4, No. 4 – June 1999 [Supplement No.5] T he Featherback family, Notopteridae, is one of the most conspicuous groups of fish in the Mekong. The peculiar knife-shaped body with a long anal fin, which is continuous with the caudal fin, readily identifies a featherback. The fish in this family are dusk- and night-active predators, with well-developed teeth on their jaws and tongues. Featherbacks do not have barbels, but they possess a small appendage on each nostril. Other characteristics include a small tuft-like dorsal fin, and very small body scales. Unlike most other fish a featherback does not flex its body when swimming. It swims by means of waving its anal fin, by which it can move both backwards and forwards. The featherbacks are capable of breathing atmospheric air by inflating the swimbladder, and they come to the surface from time to time. The four species of featherbacks in the Mekong basin belong to two genera, Notopterus and Chitala. The only specie belonging to the genus Notopterus is the bronze featherback (Notopterus notopterus). It is relatively small and rarely reaches its maximum size of about 40 cm. In adults the body colour is uniformly silvery grey or bronze, without any markings. One of the main characteristics distinguishing the bronze featherback from the Chitala featherbacks is the slightly curved, regular outline between the head and back. The Chitala species are all "hunchbacked". Another unique trait is that the headscales in the bronze featherback are larger than the body scales; in the Chitala species scales have the same size all over the fish.