DOCSLIB.ORG

Characters Useful in Identification of Pelagic Marine Fish Eggs

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Characters Useful in Identification of Pelagic Marine Fish Eggs AHLSTROM AND MOSER IDENTIFICATION OF PELAGIC MARINE FISH EGGS CalCOFI Rep., Vol. XXI, 1980 CHARACTERS USEFUL IN IDENTIFICATION OF PELAGIC MARINE FISH EGGS ELBERT H. AHLSTROM~AND H. GEOFFREY MOSER National Oceanic and Atmosperic Administration National Marine Fisheries Sewice Southwest Fisheries Center La Jolla, CA 92038 ABSTRACT huevecillos pelagicos son menos de 1.O mm de dihetro, Characters of importance in identifying pelagic marine el 30% son de entre 1.0 y 1.5 mm, el 15% son de entre fish eggs can be divided into two categories: characters 1.5 y 2.0 mm, y alrededor del 14% son de mas de 2.0 mm independent of the embryo and characters associated de dihetro. with the developing embryo. Characters independent of El corion es normalmente suave, per0 puede estar the embryo would include egg shape, egg size, character distintamente ornamentado (red poligonal, espinas, in- of chorion, character of yolk, presence or absence of oil flaciones, etc.). El espacio perivitelino es normalmente globules, and width of perivitelline space. estrecho, per0 es ancho en 10s huevecillos de algunos Planktonic marine fish eggs are usually globular in grupos primitivos de teleosteos (anguiliformes y muchos shape and range in size between 0.5 and 5.5 mm. We clupkidos). El vitelo puede ser segmentado u homogeneo. estimate that over 40% of the kinds of pelagic eggs are Gotas oleosas varian en nherodesde ninguna hasta una under 1.O mm in diameter, 30% are between 1.O and 1.5 o varias. Como 25% de 10s huevecillos de peces pelagicos mm, 15% are between 1.5 and 2.0 mm, and that about carecen de la gota oleosa, el 15% tienen de dos a varias 14% are over 2.0 mm in diameter. gotas oleosas, y el 60% tienen una sola gota oleosa. The chorion is usually smooth, but can be variously Los caracteres asociados con embriones incluirian ornamented (polygonal network, spines, swellings, etc.). patrones de pigmentacion, nherode miomeros, longitud The perivitelline space is usually narrow but is wide in del intestino, tip0 de pliegue de la aleta, posicion del cora- eggs of some primitive teleost groups (Anguilliformesand zon, estado de desarrollo en el cierre del blastoporo y el many clupeids). The yolk can be segmented or homogen- tiempo de eclosion, la forma del sac0 vitelino en la ultima eous. Oil globules range in number from none or one to fase de 10s huevecillos y las larvas recien eclosionadas, many. About 25% of pelagic fish eggs lack an oil globule, la posicion de la( s) gota( s) oleosa(s) en el sac0 vitelino, 15% have two to many oil globulds, and 60% have a y caracteres embrionicos especiales tales como las rayas single oil globule. de aleta elongadas que se forman en huevecillos traquip Characters associated with embryos would include teros. pigment patterns, number of myomeres, length of gut, type of fin fold, position of heart, state of development at INTRODUCTION blastopore closure and at hatching, shape of yolk sac on Oviparous marine teleosts extrude their eggs in a var- late-stage eggs and newly hatched larvae, position of oil iety of ways. Many inshore species have demersal eggs, globule(s) in the yolk sac, and special embryonic charac- which are often attached to rocks, shells, or seaweed. ters such as the elongated fin rays that form in trachi- Some build nests, and eggs are guarded by the male pteroid eggs. during incubation. Some demersal eggs are initially re- leased in the pelagic zone, fertilized, and then sink. The RESUMEN chorions of these eggs are characteristically mucilag- Los caracteres importantes para la identificacion de inous, permitting eggs to cling to bottom objects or to each huevecillos de peces marinos pelagicos pueden ser divi- other. Pelagic spawners usually produce separate isolated didos en dos categorias: caracteres independientes del eggs, but the eggs of some species can be aggregated in embrion, y caracteres asociados con el embrion en desa- various ways. They may be aggregated into large gelatin- rrollo. Los caracteres independientes del embrion incluirian ous masses or balloons (as in most scorpaenid genera, and la forma del huevecillo, el tamaiio del huevecillo, el carac- in the ophidiid genus BrotuZa) or can be spawned in gel- ter del corion, el caracter del vitelo, la presencia o ausen- atinous ribbon-like sheets (Lophius antennarius). An- cia de gotas oleosas, y la anchura del espacio perivitelino. other method of aggregation is attachment of eggs to each Huevecillos de peces marinos planctonicos son gene- other by filaments, a form of aggregation found in most ralmente de forma globular y varian en tamaiio entre 0.5 exoccetoid fishes and in many atherinid fishes. In our ex- y 5.5 mm. Calculamos que mas de 40% de 10s tipos de perience except for eggs of the scomberesocid fish, Colo- ISee memoria on page 5 of this volume Inquines concerning ths paper may be directed to the Zabis saira, aggregated eggs are seldom taken in plankton Junlor author hauls. The number and arrangement of chorionic fila- [Manuscnpt received 22 January 1980 I 121 AHLSTROM AND MOSER IDENTIFICATION OF PELAGIC MARINE FISH EGGS CalCOFI Rep., Vol. XXI, 1980 ments can differ strikingly among species and genera of exocoetoid fishes and provide useful characters for identification. 40~35 We are primarily interested in identifying pelagic eggs that are collected on ichthyoplankton surveys for the pur- pose of determining distribution and spawning biomass of target species. There are numerous contributions that de- scribe pelagic eggs of marine fishes in order to facilitate their identification in plankton collections. The majority of such contributions are based on rearing artifically fertilized eggs from known parents or rearing mixtures of eggs collected in plankton hauls through both the em- bryonic and larval periods to sizes that can be positively 051- 101- 151- 201- 251- 301- 351- 401- 451- 501- identified. Other contributors have used the historical 060 I IO 160 210 260 310 360 410 460 510 method of identifying eggs collected in ichthyoplankton EGG DIAMETER (mm) surveys by working backwards from late-stage larva: or Figure 1. Frequency of egg diameter for 288 species with pelagic eggs, juveniles that can be positively identified to earlier stage compiled from Mito (1961-63),Marinaro (1971), Robertson (1975),Russell larva: and ultimately to yolk-sac larva: and eggs. (1 976) and original data SUMMARY OF CHARACTERS of some marine fishes in other families are not truly spherical but rather are somewhat off-round, as in the Plates 1 and 2 scomberesocid, Scomberesox saurus (Ahlstrom 1972) The characters of importance in identification of pelag- and in several ostraciontid species (Watson and Leis ic marine eggs are the following; 1974; Plate 1). 1) egg shape: spherical or otherwise; 2) egg size: pelagic marine fish eggs range in size from Egg Size ca 0.5 to ca 5.5 mm; Pelagic fish eggs range from 0.5 mm in diameter to 3)chorion: ornamented or smooth, type of ornamenta- about 5.5 mm (Figure 1). Among the smallest marine fish tion, thickness; eggs are those of certain bothid flatfishes and labrids, 4) inner membrane: presence or absence and location whereas the eggs of the pleuronectid flatfish, Reinhard- tius hippoglossoides (4.0 to 4.5 mm size range), and a within egg; muraenid eel from the Mediterranean (ca 5.5 mm) are the 5) yolk: segmented or homogeneous, nature of seg- largest known. The majority of pelagic fish eggs are in the mentation; size range 0.6 to 1.6 mm. In some fishes, larger sized eggs 6)perivitelline space: width; result from the possession of a wide perivitelline space, as 7) oil globules: number and size; for example in some clupeids, most Anguilliformes, some 8)embryonic characters: state of development at blas- stomiatoid fishes, and the pleuronectid flatfish genus topore closure, sequence of appearance and Hippoglossoides (Plate 2). The yolk mass within some changes in pigmentation, pigment patternat hatch- large eggs may be no larger than in eggs of less than 1.5- ing, stage of development on late-stage embryos mm diameter that have a narrow perivitelline space. of various anatomical features such as eyes, Some fishes that spawn larger sized eggs with the yolk mouth, fins, digestive tract, position of anus, and mass almost filling the egg would include several pleuro- nectid flatfishes, most trachipteroid fishes, most exo- heart. coetoids that spawn separate pelagic eggs, various tetra- odontiform fishes that spawn pelagic eggs, several argen- DESCRIPTION OF CHARACTERS tinoid fishes, and some trichiurids and uranoscopids. This Egg Shape list could be made moderately extensive but, even so, Planktonic eggs are predominantly spherical, but there would probably not include more than 10% of the kinds of are some interesting exceptions. The engraulids afford the pelagic marine fish eggs. most striking exceptions; the eggs of most anchovies are ellipsoidal. The eggs of several species of engraulids Chorion The outermost structure of the egg is variously called approach the globular shape (Thryssa mystax, Delsman the egg capsule, egg shell, vitelline membrane, egg mem- 193 1; Anchoa mitchilli, Kuntz 19 14; and Setapinna brane, or chorion. Although most fish eggs have smooth phasa, Jones and Menon 1952). Delsman (1931) de- unornamented chorions, it can be variously and some- scribed eggs of several species of Stolephorus that had a times elaborately ornamented in some species. Such or- terminal knob at one end of the chorion. Planktonic eggs namentation can occur in several orders, including the 122 AHLSTROM AND MOSER: IDENTIFICATION OF PELAGIC MARINE FISH EGGS CalCOFI Rep., Vol. XXI, 1980 Salmoniformes, Myctophiformes, Gadiformes, Pleure from Hawaii (Watson and Leis 1974; Plates 1 and 2). nectiformes, Atheriniformes, Gobiesociformes, and Clu- Instead of having ornamentation on the outer surface peiformes (Rass 1972).
Load more

Recommended publications
  • Crappie and Crappie Fishing
    Crappie & Crappie Fishing Crappie are among the most popular sport fishes in Texas. They are known by various names including white perch, sac-a-lait, calico bass, and paper-mouth. Two species are found in Texas, the white crappie (Pomoxis annularis) and black crappie (P. nigromaculatus). Black crap­ pie have irregular dark speck­ les and blotches on their sides. On white crappie, the dark markings consist of regularly arranged vertical bars. When in doubt, count the number of sharp dorsal spines at the front of a crappie’s dorsal fin. Black crappie have seven or eight spines while white crappie Young crappie feed on microscopic crustaceans called have five or six. During the spawning season, males of zooplankton. Juveniles and adults feed primarily on both species develop dark markings over most of the small threadfin and gizzard shad and insect larvae, es­ body, causing many anglers to misidentify male white pecially mayflies. Their diet also includes minnows, crappie as black crappie. silversides, other crappie and any other fish small enough to swallow. Black crappie are more numerous in the clear, acidic to slightly alkaline waters of East Texas. White crappie are found state­ In lakes with low bass populations, crappie often wide. Fish of both species may live up to eight years and overpopulate and become stunted. For crappie to reach become sexually mature at one to two years. Crappie belong larger sizes, populations must experience high total mor­ to the same family as the sunfishes and black basses; like tality to keep their numbers within the carrying capacity their cousins, crappie are nest builders.
    [Show full text]
  • Fish Spawning Aggregations
    Fish Spawning Aggregations a focal point of fisheries management and marine conservation in Mexico Photo: Octavio Aburto Authorship Brad Erisman – Coastal Fisheries Research Program, University of Texas Marine Science Institute, 750 Channel View Drive, Port Aransas, TX 78373 William Heyman – LGL Ecological Research Associates, Inc., 4103 S. Texas Avenue, Bryan TX 77802 Stuart Fulton – Comunidad y Biodiversidad, Isla del Peruano 215, Lomas de Miramar, Guaymas, Sonora, Mexico Timothy Rowell – Gulf of California Marine Program, Scripps Institution of Oceanography, 9500 Gilman Drive, La Jolla, CA 92037 Illustrations – Larry Allen and Madeline Wukusick Graphic Design – Madeline Wukusick | www.communique.design Photography – Octavio Aburto, Richard Barnden, Douglas David Seifert, Walt Stearns, Cristina Limonta, Alfredo Barroso Citation – Erisman, B., W.D. Heyman, S. Fulton, and T.Rowell 2018. Fish spawning aggregations: a focal point of fisheries management and marine conservation in Mexico. Gulf of California Marine Program, La Jolla, CA. 24 p. Email Contact: Brad Erisman, [email protected] Fish Spawning Aggregations // 2 Contents > Introduction .................................................................................................................................................................. 4 > What are fish spawning aggregations (FSAs)? ............................................................................................................ 5 > What kinds of fishes form FSAs? ................................................................................................................................
    [Show full text]
  • Largemouth Bass Biology and Life History
    SRAC Publication No. 200 August 1997 VI PR Revision Largemouth Bass Biology and Life History James T. Davis and Joe T. Lock* The largemouth bass (Micropterus Largemouth bass will eat a variety salmoides) is one of several “bass- of live fish, but bluegill are partic- es” that are actually members of ularly important in ponds and the sunfish family. There are two small lakes because they repro- recognized subspecies, the duce throughout the warm Florida and the Northern, which months. This furnishes a continual will blend genetically. Although supply of different size forage. the two subspecies differ slightly Tilapia* and/or goldfish are com- in body structure, behavior, and monly used as forage on fish growth, biochemical tests are nec- farms and in intensively managed essary to positively identify them. Largemouth bass. lakes because more can be pro- duced at lower cost. About 5 Food and growth reflex action toward anything that pounds of live forage are required moves. (The bass motto: If food is for annual maintenance, and 10 Largemouth bass are valued by there, eat it.) pounds of forage are required to fishermen chiefly because of their add 1 pound of gain to large- The availability of adequate size fighting ability. They are vora- mouth bass. cious predators that readily strike live food (baitfish or forage) usu- artificial baits. Bass begin to eat ally limits bass growth. With ade- The swimming speed of large- fish when they are about 2 inches quate forage, largemouth bass can mouth bass has not been studied long. They swallow live fish and surpass 2 pounds the first year, in depth.
    [Show full text]
  • Coral Reef Fish Spawning Periodicity and Habitat in New Caledonia: a Multi-Faceted Approach in a Data-Deficient Environment
    Coral Reef Fish Spawning Periodicity and Habitat in New Caledonia: a multi-faceted approach in a data-deficient environment Adrian FLYNN1*, Sébastien SARRAMEGNA2 and Michel KULBICKI3 1Hydrobiology Pty Ltd. 47 Park Rd. PO Box 2050 Milton 4064 Queensland, Australia 2 Falconbridge NC SAS, 9, rue d'Austerlitz BP MGA08 98802 Nouméa Cedex, Nouvelle-Calédonie 3 Institut de recherche pour le développment, BP A5 98848 Nouméa Cedex, Nouvelle-Calédonie *Corresponding Author: A. Flynn e-mail: [email protected] Abstract An Environmental Impact Assessment Introduction (EIA) for a proposed mining project on the west coast While most temperate fishes have a well-defined of Northern Province, New Caledonia, required an breeding season that is regulated by hormonal changes understanding of coral reef fish spawning/aggregation and a variety of environmental cues such as periodicity and habitat utilisation in New Caledonia in temperature and photoperiod (Scott 1979; Lam 1983; order to describe and mitigate the potential impacts of Bye 1984; Stacey 1984), tropical species generally the development. A study was undertaken that have a protracted breeding season and the specific encompassed literature review, interpretation of cues regulating spawning periodicity are not well oceanographic data, analysis of gonad index data known, although photoperiod, sea temperature and spanning some 18 years, analysis of commercial currents are often quoted as the most influential fisheries production data, interpretation of sales data (Munro et al. 1973; Thresher 1984; Walsh 1987). from the Nouméa fish market, interviews with Although the timing of spawning can occur commercial and subsistence fishermen and personal randomly in tropical environments, spawning is more communication with researchers at University of New commonly synchronised within a population Caledonia regarding unpublished records and (Johannes 1978; Colin and Clavijo 1988).
    [Show full text]
  • Grade 3 Unit 2 Overview Open Ocean Habitats Introduction
    G3 U2 OVR GRADE 3 UNIT 2 OVERVIEW Open Ocean Habitats Introduction The open ocean has always played a vital role in the culture, subsistence, and economic well-being of Hawai‘i’s inhabitants. The Hawaiian Islands lie in the Pacifi c Ocean, a body of water covering more than one-third of the Earth’s surface. In the following four lessons, students learn about open ocean habitats, from the ocean’s lighter surface to the darker bottom fl oor thousands of feet below the surface. Although organisms are scarce in the deep sea, there is a large diversity of organisms in addition to bottom fi sh such as polycheate worms, crustaceans, and bivalve mollusks. They come to realize that few things in the open ocean have adapted to cope with the increased pressure from the weight of the water column at that depth, in complete darkness and frigid temperatures. Students fi nd out, through instruction, presentations, and website research, that the vast open ocean is divided into zones. The pelagic zone consists of the open ocean habitat that begins at the edge of the continental shelf and extends from the surface to the ocean bottom. This zone is further sub-divided into the photic (sunlight) and disphotic (twilight) zones where most ocean organisms live. Below these two sub-zones is the aphotic (darkness) zone. In this unit, students learn about each of the ocean zones, and identify and note animals living in each zone. They also research and keep records of the evolutionary physical features and functions that animals they study have acquired to survive in harsh open ocean habitats.
    [Show full text]
  • Atlantic "Pelagic" Fish Underwater World
    QL DFO - Library / MPO - Bibliothèque 626 U5313 no.3 12064521 c.2 - 1 Atlantic "Pelagic" Fish Underwater World Fish that range the open sea are Pelagic species are generally very Atlantic known as " pelagic" species, to dif­ streamlined. They are blue or blue­ ferentiate them from "groundfish" gray over their backs and silvery­ "Pelagic" Fish which feed and dwell near the bot­ white underneath - a form of tom . Feeding mainly in surface or camouflage when in the open sea. middle depth waters, pelagic fish They are caught bath in inshore travel mostly in large schools, tu. n­ and offshore waters, principally with ing and manoeuvring in close forma­ mid-water trawls, purse seines, gill tion with split-second timing in their nets, traps and weirs. quest for plankton and other small species. Best known of the pelagic popula­ tions of Canada's Atlantic coast are herring, but others in order of economic importance include sal­ mon, mackerel , swordfish, bluefin tuna, eels, smelt, gaspereau and capelin. Sorne pelagic fish, notably salmon and gaspereau, migrate from freshwater to the sea and back again for spawning. Eels migrate in the opposite direction, spawning in sait water but entering freshwater to feed . Underwater World Herring comprise more than one­ Herring are processed and mar­ Atlantic Herring keted in various forms. About half of (Ctupea harengus) fifth of Atlantic Canada's annual fisheries catch. They are found all the catch is marketed fresh or as along the northwest Atlantic coast frozen whole dressed fish and fillets, from Cape Hatteras to Hudson one-quarter is cured , including Strait.
    [Show full text]
  • Forage Fish Management Plan
    Oregon Forage Fish Management Plan November 19, 2016 Oregon Department of Fish and Wildlife Marine Resources Program 2040 SE Marine Science Drive Newport, OR 97365 (541) 867-4741 http://www.dfw.state.or.us/MRP/ Oregon Department of Fish & Wildlife 1 Table of Contents Executive Summary ....................................................................................................................................... 4 Introduction .................................................................................................................................................. 6 Purpose and Need ..................................................................................................................................... 6 Federal action to protect Forage Fish (2016)............................................................................................ 7 The Oregon Marine Fisheries Management Plan Framework .................................................................. 7 Relationship to Other State Policies ......................................................................................................... 7 Public Process Developing this Plan .......................................................................................................... 8 How this Document is Organized .............................................................................................................. 8 A. Resource Analysis ....................................................................................................................................
    [Show full text]
  • Estuarine Fish Diversity of Tamil Nadu, India
    Indian Journal of Geo Marine Sciences Vol. 46 (10), October 2017, pp. 1968-1985 Estuarine fish diversity of Tamil Nadu, India H.S. Mogalekar*, J. Canciyal#, P. Jawahar, D.S. Patadiya, C. Sudhan, P. Pavinkumar, Prateek, S. Santhoshkumar & A. Subburaj Department of Fisheries Biology and Resource Management, Fisheries College & Research Institute, (Tamil Nadu Fisheries University), Thoothukudi-628 008, India. #ICAR-National Academy of Agricultural Research Management, Rajendranagar, Hyderabad-500 030, Telangana, India. *[E-Mail: [email protected]] Received 04 February 2016 ; revised 10 August 2017 Systematic and updated checklist of estuarine fishes contains 330 species distributed under 205 genera, 95 families, 23 orders and two classes. The most diverse order was perciformes with 175 species, 100 genera and 43 families. The top four families with the highest number of species were gobidae (28 species), carangidae (23 species), engraulidae (15 species) and lutjanidae (14 species). Conservation status of all taxa includes one species as endangered, five species as vulnerable, 14 near threatened, 93 least concern and 16 data deficient. As numbers of commercial, sports, ornamental and cultivable fishes are high, commercial and recreational fishing could be organized. Seed production by selective breeding is recommended for aquaculture practices in estuarine areas of Tamil Nadu. [Keywords: Estuarine fishes, updated checklist, fishery and conservation status, Tamil Nadu] Introduction significant component of coastal ecosystem due to The total estuarine area of Tamil Nadu their immense biodiversity values in aquatic was estimated to be 56000 ha, which accounts ecology. The fish fauna inhabiting the estuarine 3.88 % of the total estuarine area of India 1.
    [Show full text]
  • Blue Water Spawning by Moorish Idols and Orangespine Surgeonfish in Palau: Is It a “Suicide Mission”?
    aqua, International Journal of Ichthyology Blue Water Spawning by Moorish Idols and Orangespine Surgeonfish in Palau: Is it a “Suicide Mission”? Mandy T. Etpison1 and Patrick L. Colin2 1) Etpison Museum, PO Box 7049, Koror, Palau 96940. Email: [email protected] 2) Coral Reef Research Foundation, PO Box 1765, Koror, Palau 96940. Email: [email protected] Received: 13 December 2017 – Accepted: 05 March 2018 Keywords am Morgen zu den Laichplätzen, schlossen sich zu Gruppen Predation, aggregation, feeding frenzy, gray reef shark, zusammen und bewegten sich über der Rifffläche auf und lunar periodicity. ab und zogen dabei die Aufmerksamkeit von Beutegreifern auf sich. Um die Mittagszeit steigen sie vom Riff auf und Abstract begeben sich ins freie Wasser jenseits vom Riff. Graue Spawning aggregations of the moorish idol (MI) and or- Riffhaie folgen ihnen, greifen sie an der Oberfläche an und angespine surgeonfish (OSS) were found on the western verzehren viele von ihnen in einem Fressrausch. Ein hoher barrier reef of Palau. MI aggregated around the first quar- Prozentsatz der aufsteigenden erwachsenen HF wird von ter moon from Dec. to Mar., with largest groups in Jan. den Haien gefressen, nur wenige können in die sichere Zone and Feb. Fish arrived near the sites in the morning, des Riffs zurückkehren. KD versammeln sich in denselben grouped together and moved up and down the reef face up Monaten, aber in der Zeit des letzten Mondviertels – wobei in late morning attracting the attention of predators. At es hierüber weniger Berichte gibt. Die Beobachtungen bei mid-day they ascend from the reef out into open water beiden Fischarten, dass sie weit nach oben steigen und sich away from the reef.
    [Show full text]
  • ANALISIS ASPEK BIOLOGI IKAN TERBANG Cheilopogon Katoptron Bleeker, 1865, DI PERAIRAN PEMUTERAN, BALI BARAT TESIS DONY ARMA
    UNIVERSITAS INDONESIA ANALISIS ASPEK BIOLOGI IKAN TERBANG Cheilopogon katoptron Bleeker, 1865, DI PERAIRAN PEMUTERAN, BALI BARAT TESIS DONY ARMANTO 0906577034 FAKULTAS MATEMATIKA DAN ILMU PENGETAHUAN ALAM PROGRAM MAGISTER ILMU KELAUTAN DEPOK JANUARI 2012 Analisis aspek..., Dony Armanto, FMIPA UI, 2012 2 UNIVERSITAS INDONESIA ANALISIS ASPEK BIOLOGI IKAN TERBANG Cheilopogon katoptron Bleeker, 1865, DI PERAIRAN PEMUTERAN, BALI BARAT TESIS Diajukan sebagai salah satu syarat untuk memperoleh gelar Magister Sains DONY ARMANTO 0906577034 FAKULTAS MATEMATIKA DAN ILMU PENGETAHUAN ALAM PROGRAM MAGISTER ILMU KELAUTAN DEPOK JANUARI 2012 ii Universitas Indonesia Analisis aspek..., Dony Armanto, FMIPA UI, 2012 3 HALAMAN PERNYATAAN ORISINALITAS Tesis ini adalah hasil karya sendiri, dan semua sumber baik yang dikutip maupun yang dirujuk telah saya nyatakan dengan benar. Nama : Dony Armanto NPM : 0906577034 Tanda Tangan : .............................. Tanggal : 3 Januari 2012 iii Universitas Indonesia Analisis aspek..., Dony Armanto, FMIPA UI, 2012 4 HALAMAN PENGESAHAN Tesis ini diajukan oleh: Nama : Dony Armanto NPM : 0906577034 Program Studi : Magister Ilmu Kelautan Judul Tesis : Analisis Aspek Biologi Ikan Terbang Cheilopogon katoptron Bleeker, 1865, di Perairan Pemuteran, Bali Barat Telah berhasil dipertahankan di hadapan Dewan Penguji dan diterima sebagai bagian persyaratan yang diperlukan untuk memperoleh gelar Magister Sains (M.Si) pada Program Studi Ilmu Kelautan, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Indonesia. DEWAN PENGUJI
    [Show full text]
  • Pelagic Fish Catch Or Other Means Reposting, Photocopy Machine, Is Only W Permitted Around Java E Oceanography Society
    or collective redistirbution of any portion article of any by of this or collective redistirbution Th THE INDONESIAN SEAS articleis has been in published Oceanography Seasonal Variation of 18, Number journal of Th 4, a quarterly , Volume Pelagic Fish Catch permitted only w is photocopy machine, reposting, means or other Around Java 2005 by Th e Oceanography Copyright Society. BY NANI HENDIARTI, SUWARSO, EDVIN ALDRIAN, of Th approval the ith KHAIRUL AMRI, RETNO ANDIASTUTI, gran e Oceanography is Society. All rights reserved. Permission SUHENDAR I. SACHOEMAR, or Th e Oceanography [email protected] Society. Send to: all correspondence AND IKHSAN BUDI WAHYONO ted to copy this article Repu for use copy this and research. to in teaching ted e Oceanography Society, PO Box 1931, Rockville, MD 20849-1931, USA. blication, systemmatic reproduction, reproduction, systemmatic blication, 112 Oceanography Vol. 18, No. 4, Dec. 2005 WE PRESENT DATA on the seasonal variability of small and 1.26 million ton/year in the Indonesian EEZ. Pelagic fi sh pelagic fi sh catches and their relation to the coastal processes play an important role in the economics of fi sherman in Indo- responsible for them around the island of Java. This study uses nesia; approximately 75 percent of the total fi sh stock, or 4.8 long fi sh-catch records (up to twenty years) collected at vari- million ton/year, is pelagic fi sh. In particular, we investigated ous points around Java that were selected from the best-qual- the waters around Java because most people live near the coast ity harbor records.
    [Show full text]
  • Other Processes Regulating Ecosystem Productivity and Fish Production in the Western Indian Ocean Andrew Bakun, Claude Ray, and Salvador Lluch-Cota
    CoaStalUpwellinO' and Other Processes Regulating Ecosystem Productivity and Fish Production in the Western Indian Ocean Andrew Bakun, Claude Ray, and Salvador Lluch-Cota Abstract /1 Theseasonal intensity of wind-induced coastal upwelling in the western Indian Ocean is investigated. The upwelling off Northeast Somalia stands out as the dominant upwelling feature in the region, producing by far the strongest seasonal upwelling pulse that exists as a; regular feature in any ocean on our planet. It is surmised that the productive pelagic fish habitat off Southwest India may owe its particularly favorable attributes to coastal trapped wave propagation originating in a region of very strong wind-driven offshore trans­ port near the southern extremity of the Indian Subcontinent. Effects of relatively mild austral summer upwelling that occurs in certain coastal ecosystems of the southern hemi­ sphere may be suppressed by the effects of intense onshore transport impacting these areas during the opposite (SW Monsoon) period. An explanation for the extreme paucity of fish landings, as well as for the unusually high production of oceanic (tuna) fisheries relative to coastal fisheries, is sought in the extremely dissipative nature of the physical systems of the region. In this respect, it appears that the Gulf of Aden and some areas within the Mozambique Channel could act as important retention areas and sources of i "see6stock" for maintenance of the function and dillersitv of the lamer reoional biolooical , !I ecosystems. 103 104 large Marine EcosySlIlms ofthe Indian Ocean - . Introduction The western Indian Ocean is the site ofsome of the most dynamically varying-. large marine ecosystems (LMEs) that exist on our planet.
    [Show full text]