DOCSLIB.ORG

Reproductive Isolation and Distinct Population Structures in Two Types of the Freshwater Shrimp Palaemon Paucidens

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Reproductive Isolation and Distinct Population Structures in Two Types of the Freshwater Shrimp Palaemon Paucidens Evolution,42(4), 1988, pp. 804-813 REPRODUCTIVE ISOLATION AND DISTINCT POPULATION STRUCTURES IN TWO TYPES OF THE FRESHWATER SHRIMP PALAEMON PA UCIDENS SEINENCHOW,' YOSHIHISA Fujio, AND TADASHINOMURA Departmentof Fishery Science, Tohoku University, Amamiyamachi, Sendai 980, JAPAN Abstract.-Twenty local populations of the Japanese freshwater shrimp Palaemon paucidens were electrophoreticallyand morphologicallysurveyed. Based on the diagnosticdistributions of some alleles at Gpi, Mpi, Mdh-J,and Mdh-2, these populationswere largelyclassified into two types(A and B). The A type occurredin lakes, ponds, and rivers,while the B type was observed only in rivers. Average Nei's genetic distance (D) between the two types fell into the subspecies range (D = 0.1 186). The coefficientof gene differentiation,GsT, varied considerablybetween the two types.In 12 populations of the A type,with a GST value of 0.281, nine pond and lake populations showed a higherGsT (0.246) than the threeriver populations (0.151). On the otherhand, GsT was 0.036 forthe eightlocal populations of the B type.The lower rostrumtooth numberhad a mode of two in typeA and threein typeB. Type-A populationslargely varied in the upperrostrum tooth numberand egg size but typeB did not. Under laboratoryconditions, mating frequently occurred withineach type,but not between types.Furthermore, no embryonicdevelopment was observed in the fewcases of intertypemating. These resultsindicate thatthe A and B typeshad experienced cladogenic separationwith pre- or postmatingisolation, whereafterthe A type,under geographic isolation,underwent genetic and phenotypicdifferentiation, while the B type,under extensive gene flow,did not undergodifferentiation. Received February6, 1987. Accepted January13, 1988 It has been long recognizedthat intraspe- caughtin the same area, we concluded that cific genetic differentiationof sexually re- the typesare reproductivelyisolated in the producingspecies is promotedby geograph- singleriver basin. Differencesin eggsize and ic and reproductiveisolation. Cladogenic rostrumtooth number between the types are separation accompanying intrinsicrepro- apparentlymaintained by the reproductive ductive isolation is now generallyaccepted isolation. Additional analysis of the allelic as speciation. Even so, genetic differentia- distributionssuggested that the geneticdis- tion can occur in geographicallyisolated tance between the types fell into the range populations without such intrinsicrepro- of subspecies, according to the rough cri- ductive isolation. Thus, the origin,nature, teriongiven by Nei (1975) (Chow and Fujio, and functionof isolatingmechanisms play 1985c). Nishino's (1980) discoveryof great importantroles in evolutionarychanges. variation in egg size among local popula- A previous paper provided biochemical tions of this species led us to presume a evidence of two typesof common Japanese highlysubdivided and geneticallydifferen- freshwatershrimp Palaemon paucidens in- tiated population structureand convinced habitingthe same watersystem (Chow and us thatan extensivesurvey of the local pop- Fujio, 1985a). The two types,named A and ulationswould be worthwhile.In thispaper, B, were clearly distinguishedby the pres- we present evidence for reproductiveiso- ence or absence of diagnosticalleles at the lation and distinctpopulation structures be- glucosephosphate isomerase (Gpi), man- tweenthe two typesof Palaemon paucidens nosephosphateisomerase (Mpi), and malate and discuss the processes involved in di- dehydrogenase(Mdh-1 and Mdh-2) loci. vergence between and within these two Since both typeshave almost the same re- types. productiveseason and since mature males and femalesof each typeare simultaneously MATERIALS AND METHODS All samples of 20 local populations of P. paucidens were collectedwith dip nets dur- I Present address: Marine Resources Research In- ing the months of March-September in stitute,Charleston, SC 29412. 1983-1986. Sitesand theirnames are shown 804 REPRODUCTIVE ISOLATION 805 *~HNP 30 km IHPO KMP 2 km FIG. 1. Map showingcollection localities ofPalaemon paucidens. Miyagi Prefecture:IHP = Ishihoga Pond, HNP = Hinata Pond, KMP = Katamase Pond, HKP = Hanukizawa Pond, TTP = Tomita Pond, ATP = Aburata Pond, KKR = Kitakami River, NRR = Naruse River, HRR = Hirose River, NTR = Natori River, ABR = Abukuma River, SIR = ShiroishiRiver; Ibaragi Prefecture:NKR = Naka River; Tokyo: SPP = Sanpoji Pond, TMR = Tama River; Chiba Prefecture:KYR = Kiyosumi River, OBR = Ohbiso River; Ishikawa Prefecture: LK = Lake Kahokugata; Shiga Prefecture:LB = Lake Biwa; Hiroshima Prefecture:ASR = Ashida River. Symbols show the A (0) and B ( H)types. in Figure 1. Live samples were transferred exceed 0.95. Observed heterozygosity(h.) to the laboratory,except forthose of Lake was obtained fromdirect counts of hetero- Kahokugata which were frozen on dry ice zygotes,while expected heterozygosity(he) fortransport. was calculated as he = 1 - : xi2,where xi Rostrum tooth number and egg volume is the frequencyof the ith allele at each lo- were adopted as the morphological char- cus. Mean heterozygosities and He) for acters. Ten eggs at the pre-eye stage of (H. each local population were obtained from development were measured from each mother shrimp. The egg volume (V) was the formulas,H. = : ho/rand He = : he! calculated from the formula V==rh2/6, r, where r is the number of loci. Allele-fre- where I and h are lengthand width of an quency data were used to calculate genetic egg in mm, respectively.(Data forrostrum distance(D) (Nei, 1972) and a coefficientof toothnumber and eggvolume in the Natori gene differentiation(GST) (Nei, 1973). and Hirose riverswere derived fromChow Mating experiments were designed to and Fujio [1985a].) Afterthese measure- compare the matingpropensities of mature ments,some individuals were rearedin 40- males and femaleswhen they are pairedwith liter aquaria at 250C for mating experi- potential mates fromthe same versus dif- ments,and otherswere wrapped and stored ferentlocal populations and of the same at -800C forelectrophoresis. versus differenttypes. In decapod crustacea Horizontal starch-gelelectrophoresis and (especially Caridea), mature females molt nomenclatureof alleles followedChow and priorto matingand spawning.In captivity, Fujio(1985a, 1985b).Allele-frequencydata the mature females of P. paucidens were for the Natori, Kitakami, Naruse, Hirose, distinguishedby fully developed ovaries, Abukuma, Naka, Ohbiso, and Kiyosumi whichcould be observed throughthe trans- rivers are from Chow and Fujio (1985a, lucent exoskeleton. Mature females were 1985b). A locus was assumed to be poly- takenout ofcommunal holdingaquaria and morphicin each local population if the fre- maintained individually; these usually quency of the most common allele did not underwent a prespawning molt within a 00 O TABLE 1. Summarized allele distributionsat fivediagnostic loci of 20 local populations.Localities and abbreviationsare as given in Figure 1. Symbols: #= most common allele (P _ 0.50); * = otheralleles (0.05 _ P < 0.50). Rare alleles (P < 0.05) are not shown here.Detailed allele-frequencydata is available upon request fromthe authors. A-typelocalities B-typelocalities Locus Allele IHP HNP KMP HKP TTP ATP NTR SPP TMR LK LB ASR KKR NRR HRR ABR SIR NKR OBR KYR Gpi A # # # # # # # * # # # # B * * * * * * * # * * # # # # # # # # Q MPI A' * * A # * * # # # # # # # # # C B * # # * * * * * C * * * * * * * * * # * # # # # # # D * * # * * * * * * > Mdh-J B # # # # # # # # # # # # # # # # # # # C' * C * * * * * * * * * Mdh-2 A # # # * # * * B * * * # * # # # # # # # # # # # # # # # 6Pgd A * * * * * * * # # * * B # # # # # # # # # # # # # # # # # # REPRODUCTIVE ISOLATION 807 week. Each molted female was then trans- rangedfrom 0.0602 to 0.1945 witha mean ferredto an aquarium containing 10-20 of 0.1186. The dendrogramdrawn by the males, obtained fromeither the same or a UPGMA methods(Sneath and Sokal, 1973) differentlocality. The aquarium was then and based on the genetic-distancevalues is observedfor five minutes for signs of sexual shown in Figure 2. There are two major behavior (chasing, mounting,and mating clustersat a discriminantlevel of0.1, clearly by males). Females were transferredfrom separatingA and B types.The diversitylevel one aquarium to another until mating oc- among the A-type populations was large, curred.Females thatdid notmate with males and one subcluster(LK and LB) was quite fromany otherlocalities were finallypaired differentfrom the other localities. The D with males fromthe same localityin order values betweenthe subclusterof LK and LB to evaluate whetherthey were still sexually and otherA-type populations ranged from attractiveor not. If a femalewas not mated, 0.0548 to 0.1057, with a mean of 0.0770; the matingexperiment was abandoned for D values betweenthe subclusterand B-type thatfemale. After mating, females were iso- populations range from 0.1645 to 0.1879 lated and maintained individuallyto con- with a mean of 0.1770. Formation of this firmfertilization. distinctsubcluster is due to the diagnostic allele distributionat the 6Pgd locus. The RESULTS diversitylevel among the B-type popula- Genetic Variation and Differentiation.- tions was extremelysmall. The difference Out of the total of 15 loci encoding 1 1 en- in diversitylevels betweeneach typeis fur- zymes, eight(Aat-2, aGpd-1, aGpd-2, Est, thershown by the coefficientof gene differ- Idh, Ldh, Me-i, and Me-2) were mono- entiation, GST (see Table 2). For the 12 morphicin all local populations,and
Load more

Recommended publications
  • Ecology of Nonnative Siberian Prawn (Palaemon Modestus) in the Lower Snake River, Washington, USA
    Aquat Ecol DOI 10.1007/s10452-016-9581-4 Ecology of nonnative Siberian prawn (Palaemon modestus) in the lower Snake River, Washington, USA John M. Erhardt . Kenneth F. Tiffan Received: 20 January 2016 / Accepted: 30 April 2016 Ó Springer Science+Business Media Dordrecht (outside the USA) 2016 Abstract We assessed the abundance, distribution, year, suggesting prawns live from 1 to 2 years and and ecology of the nonnative Siberian prawn Palae- may be able to reproduce multiple times during their mon modestus in the lower Snake River, Washington, life. Most juvenile prawns become reproductive adults USA. Analysis of prawn passage abundance at three in 1 year, and peak reproduction occurs from late July Snake River dams showed that populations are through October. Mean fecundity (189 eggs) and growing at exponential rates, especially at Little reproductive output (11.9 %) are similar to that in Goose Dam where over 464,000 prawns were col- their native range. The current use of deep habitats by lected in 2015. Monthly beam trawling during prawns likely makes them unavailable to most preda- 2011–2013 provided information on prawn abundance tors in the reservoirs. The distribution and role of and distribution in Lower Granite and Little Goose Siberian prawns in the lower Snake River food web Reservoirs. Zero-inflated regression predicted that the will probably continue to change as the population probability of prawn presence increased with decreas- grows and warrants continued monitoring and ing water velocity and increasing depth. Negative investigation. binomial models predicted higher catch rates of prawns in deeper water and in closer proximity to Keywords Invasive species Á Abundance Á dams.
    [Show full text]
  • BIOLÓGICA VENEZUELICA Es Editada Por Dirección Postal De Los Mismos
    7 M BIOLÓGICA II VENEZUELICA ^^.«•r-íí-yííT"1 VP >H wv* "V-i-, •^nru-wiA ">^:^;iW SWv^X/^ií. UN I VE RSIDA P CENTRAL DÉ VENEZUELA ^;."rK\'':^>:^:;':••'': ; .-¥•-^>v^:v- ^ACUITAD DE CIENCIAS INSilTÜTO DÉ Z00LOGIA TROPICAL: •RITiTRnTOrr ACTA BIOLÓGICA VENEZUELICA es editada por Dirección postal de los mismos. Deberá suministrar­ el Instituto de Zoología Tropical, Facultad, de Ciencias se en página aparte el título del trabajo en inglés en de la Universidad Central de Venezuela y tiene por fi­ caso de no estar el manuscritp elaborado en ese nalidad la publicación de trabajos originales sobre zoo­ idioma. logía, botánica y ecología. Las descripciones de espe­ cies nuevas de la flora y fauna venezolanas tendrán Resúmenes: Cada resumen no debe exceder 2 pági­ prioridad de publicación. Los artículos enviados no de­ nas tamaño carta escritas a doble espacio. Deberán berán haber sido publicados previamente ni estar sien­ elaborarse en castellano e ingles, aparecer en este do considerados para tal fin en otras revistas. Los ma­ mismo orden y en ellos deberá indicarse el objetivo nuscritos deberán elaborarse en castellano o inglés y y los principales resultados y conclusiones de la co­ no deberán exceder 40 páginas tamaño carta, escritas municación. a doble espacio, incluyendo bibliografía citada, tablas y figuras. Ilustraciones: Todas las ilustraciones deberán ser llamadas "figuras" y numeradas en orden consecuti­ ACTA BIOLÓGICA VENEZUELICA se edita en vo (Ejemplo Fig. 1. Fig 2a. Fig 3c.) el número, así co­ cuatro números que constituyen un volumen, sin nin­ mo también el nombre del autor deberán ser escritos gún compromiso de fecha fija de publicación.
    [Show full text]
  • The Reproductive Performance of the Red-Algae Shrimp Leander Paulensis
    Zimmermann et al.: The reproductive performance of Leander paulensis ORIGINAL ARTICLE / ARTIGO ORIGINAL BJOCE The reproductive performance of the Red-Algae shrimp Leander paulensis (Ortmann, 1897) (Decapoda, Palaemonidae) and the effect of post-spawning female weight gain on weight-dependent parameters Uwe Zimmermann1,2, Fabrício Lopes Carvalho2,3, Fernando L. Mantelatto2,* 1 Eberhard Karls-University Tübingen, Faculty of Science, Department of Biology (Auf der Morgenstelle 28, 72076 Tübingen, Germany) 2 Universidade de São Paulo (USP), Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (FFCLRP), Departamento de Biologia, Laboratório de Bioecologia e Sistemática de Crustáceos (LBSC) (Av. Bandeirantes, 3900, Ribeirão Preto, 14040-901, São Paulo, Brazil) 3 Universidade Federal do Sul da Bahia (UFSB), Instituto de Humanidades, Artes e Ciências Jorge Amado (IHAC-JA) (Rod. Ilhéus-Vitória da Conquista, km 39, BR 415, 45613-204, Ferradas, Itabuna, Bahia, Brazil) *Corresponding author: [email protected] Financial Support: FAPESP (Temático Biota 2010/50188-8) CAPES (Ciências do Mar II Proc. 2005/2014 - 23038.004308/201414) CNPq (DR 140199/2011-0 and PQ 302748/2010-5; 304968/2014-5) ABSTRACT RESUMO Decapod species have evolved with a variety of Decápodes desenvolveram uma ampla variedade reproductive strategies. In this study reproductive de estratégias reprodutivas. Neste estudo foram features of the palaemonid shrimp Leander paulensis investigadas características reprodutivas da espécie de were investigated. Individuals were collected in the Palaemonidae Leander paulensis. Os indivíduos foram coastal region of Ubatuba, São Paulo, Brazil. In coletados na região costeira de Ubatuba, São Paulo, all, 46 ovigerous females were examined in terms Brasil. Foram examinadas 46 fêmeas ovígeras quanto of the following reproductive traits: fecundity, aos seguintes aspectos reprodutivos: fecundidade, reproductive output, brood loss and egg volume.
    [Show full text]
  • A Review of Two Western Australian Shrimps of the Genus Palaemonetes
    , Rec. West. Aust. Mus., 1976,4 (1) A REVIEW OF 1'WO WESTERN AUSTRALIAN SHRIMPS OF THE GENUS PALAEMONETES, P. AUSTRALIS DAKIN 1915 AND P. ATRINUBES·SP. NOV. (DECAPODA, PALAEMONIDAE) DAVID M. BRAY* [Received 6 May 1975. Accepted 1 October 1975. Published 31 August 1976.] ABSTRACT Palaemonetes atrinubes sp. novo from marine and estuarine habitats of north and west Australia is described. Palaemonetes australis Dakin from fresh­ water and estuarine habitats of south and west Australia is redescribed and data on the variation in the mandibular palp is included. The use of the mandibular palp as a single character to form generic groupings within the Palaemoninae of the world is only partially successful. The affinities of P. australis and P. atrinubes with other Australian Palaemoninae are discussed and a key to the Australian species of Palaemon and Palaemonetes is given. INTRODUCTION In his major reVISIons of the Indo-Pacific and American Palaemonidae, Holthuis (1950, 1952) regarded the mandibular palp as a character'of generic importance. After grouping species with branchiostegal spines and without supraorbital spines he classified species with mandibular palps into the genera Creasaria, Leander and Palaemon while species without mandibular palps were classified into the genera Leandrites and Palaemonetes. Despite these groupings he considered Palaemonetes to closely resemble Palaemon stating that the 'only difference of importance is that in Palaemon the mandible possesses a palp, while this palp is absent in Palaemonetes'. In the same revisions Holthuis used the number of segments in the mandibular palp as a character of subgeneric llnportance. Within the genus Palaemon he grouped species with branchio-stegal groove present, pleura of fifth abdominal segment pointed and rostrum without elevated basal crest.
    [Show full text]
  • Histological and Ultrastructural Studies on the Y Organ and The
    Histological and Ultrastructural Studies on the Y Organ and the Mandibular Organ of the Freshwater Prawn, Palaemon Title paucidens, with Special Reference to Their Relation with the Molting Cycle (With 2 Text-figures, 1 Table and 6 Plates) Author(s) AOTO, Tomoji; KAMIGUCHI, Yujiroh; HISANO, Setsuji Citation 北海道大學理學部紀要, 19(2), 295-308 Issue Date 1974-04 Doc URL http://hdl.handle.net/2115/27562 Type bulletin (article) File Information 19(2)_P295-308.pdf Instructions for use Hokkaido University Collection of Scholarly and Academic Papers : HUSCAP Histological and Ultrastructural Studies on the Y Organ and the Mandibular Organ of the Freshwater Prawn, Palaemon paucidens, with Special Reference to Their Relation with the Molting Cycle By Tomoji Aoto, Yujiroh Kamiguchi and Setsuji Hisano Zoological Institute, Hokkaido University (With 2 Text-jigure8, 1 Table and 6 Plate8) Since Gabe's first description of "l'organe Y" in some malacostracan crusta­ ceans and his implication of this organ as an ecdysial gland that is comparable to the one in insects (Gabe, 1953, 1954), a number of investigations have been carried out in an effort to clarify physiological significance, if any, of this tiny' structure (for references, see Gabe, 1966; Herman, 1967). Thus, the Y organ from more than lOO different species of crustaceans has been described (Gabe, 1956; Echalier, 1959). Unfortunately, however, so little has been reported of anatomi­ cal and cytological details of this organ that there has been a considerable confusion concerning its exact location and identification among the authors. Meanwhile, Le Roux (1968) discovered in the cephalothorax of a crab Carcinus maenas a pair of glandular structure which, structurally so different from the Y organ, he proposed to name "the mandibular organ".
    [Show full text]
  • Download Article (PDF)
    Cent. Eur. J. Biol. • 9(1) • 2014 • 80-85 DOI: 10.2478/s11535-013-0184-3 Central European Journal of Biology Microhabitat distribution and behaviour of Branchiobdellidan Holtodrilus truncatus found on the freshwater shrimp Neocaridina spp. from the Sugo River, Japan Research Article Nobuaki Niwa1,*, Miguel Vazquez Archdale2, Takashi Matsuoka2, Aina Kawamoto1, Haruka Nishiyama1 1Kobe Municipal Rokko Island Senior High School, 658-0032 Hyogo, Japan 2Faculty of Fisheries, Kagoshima University, Shimoarata 4-50-20, 890-0056 Kagoshima, Japan Received 26 August 2012; Accepted 05 March 2013 Abstract: A study was performed on the microhabitat distribution and some aspects of behaviour of the ectosymbiotic branchiobdellidan Holtodrilus truncatus (Annelida, Clitellata) found on the freshwater shrimp that inhabit the Sugo River, Hyogo Prefecture, western Japan. Observations on shrimp that were collected from the Sugo River (2003 to 2011) confirmed that the host shrimp is Neocaridina spp. (Atyidae). The attachment location on the host shrimp was predominately between the 1st pleopod and the 5th pereopod (55.3%). The reproductive method of H. truncatus is hemaphroditism. The cocoon was found only inside the carapace of the host shrimp. The cocoon was transparent and contained a maximum of 14 juvenile worms (developing embryos). When hatching approached, H. truncatus’s worms became elongated and slender, and only one worm hatched out at a time. When Holtodrilus truncatus was removed from its host and was maintained in river water without any food, it survived for a maximum of 46 days. In a host exchange experiment, where we provided several other freshwater shrimp species, Palaemonidae fed on H. truncatus.
    [Show full text]
  • Reproduction and Growth of the Freshwater Prawn, Palaemon Paucidens (Decapoda: Palaemonidae) in a Lake of Korea
    Journal of Environmental Biology March 2008, 29(2) 163-168 (2008) ©Triveni Enterprises, Lucknow (India) For personal use only Free paper downloaded from: ww w. jeb.co.in Commercial distribution of this copy is illegal Reproduction and growth of the freshwater prawn, Palaemon paucidens (Decapoda: Palaemonidae) in a lake of Korea Jong Chun Kim 1, Chae Woo Ma* 1, Chul Woong Oh 2 and Sang Gyu Paik 3 1Department of Marine Biotechnology, Soonchunhyang University, Asan, Chungnam - 336 745, Korea 2Department of Marine Biology, Pukyung National University, Busan - 336 745, Korea 3Marine Ecosystem and Environment Research Division, Korea Ocean Research and Development Institute, Ansan P.O. Box 29, 425 600, Korea (Received: April 09, 2007 ; Revised received: August 02, 2007 ; Accepted: September 15, 2007) Abstract: This study analyzed the reproduction and growth of freshwater prawn, Palaemon paucidens De Haan 1844 from Suk-dang lake(y Korea). The analysis of the sex ratio showed a higher proportion of males than that of females. The average size of the eggs was 6.12 (± 0.55) mm 3 in the non-eyed stage (stage A) and 7.20(±0.86)mm 3 in the eyed stage (stage B). The reproductive output (RO) calculated with the dried-body weight of an incubating female and the weight of the eggs in dried condition was 26.97% (n = 17) of the average females weight. Incubating prawn appeared in April, and the gonadosomatic indices(GSI) showed the highest value during three months from January to March. Based on the month when there was a high proportion of incubating females with a high GSI, the estimated spawning season of P.
    [Show full text]
  • Mating Behavior in the Freshwater Prawn, Palaemon Paucidens. : a Study of the Sex Pheromone and Its Effect on Title Males (With 5 Figures and 2 Tables)
    Mating Behavior in the Freshwater Prawn, Palaemon paucidens. : A Study of the Sex Pheromone and its Effect on Title Males (With 5 Figures and 2 Tables) Author(s) KAMIGUCHI, Yujiroh Citation 北海道大學理學部紀要, 18(3), 347-355 Issue Date 1972-10 Doc URL http://hdl.handle.net/2115/27533 Type bulletin (article) File Information 18(3)_P347-355.pdf Instructions for use Hokkaido University Collection of Scholarly and Academic Papers : HUSCAP Mating Behavior in the Freshwater Prawn, Palaemon paucidens. A Study of the Sex Pheromone and its Effect on Malesl ) By 1 Yujiroh Kamiguchi Zoological Institute, Hokkaido University (With 5 Figures and 2 Tables) It is well established that the courtship in many insects is initiated by sex attractant from females. Investigations have been made on the nature of such chemical communicants, and the purification, identification, and even synthesis of sex pheromones have been carried out successfully with several lepidopterans, the honey bee and cockroaches (for reference, see Highnam and Hill, 1969). Unfortunately, however, very little information is available on the sex phero­ mone in Crustacea, although its existence in some species seems most likely. Recently several authors reported the sex pheromones in decapod crustaceans, because the males displayed a sexual attraction to the premolt females of the large edible crab, Portunus sanguinolentus (Ryan, 1966), or to the newly molted females of the American lobster, Homarus americanus (McLeese, 1970; Atema and Engstrom, 1971). However, these authors have failed to show the site of origin and chemical nature of the pheromones. A female freshwater prawn, Palaemon paucidens, with a fully mature ovary performs prior to copulation and egg-laying the "parturial" molt, which accom­ panying a series of morphological changes in the abdominal region of the prawn leads to the formation of the brooding chamber (Kamiguchi, 1971).
    [Show full text]
  • Discrimination of Two Freshwater Shrimps, Palaemon Paucidens De Haan, 1844 and P. Sinensis (Sollaud, 1911) Using Plumose Setae of Telson and Appendix Masculina
    Biogeography 20. 103–110. Sep. 20, 2018 Discrimination of two freshwater shrimps, Palaemon paucidens De Haan, 1844 and P. sinensis (Sollaud, 1911) using plumose setae of telson and appendix masculina Tadashi Imai 1*, Kazuki Hayashi 2, Masayuki Nakaso 3, Seinen Chow 4, Kenji Nohara 5 and Takakiyo Oonuki 5 1 National Research Institute of Fisheries and Environment of Inland Sea, Japan Fisheries Research and Education Agency, 234 Yashima-higashi, Takamatsu, Kagawa, 761-0111 Japan 2 Kagawa Prefectural Fisheries Experiment Station, 75-5 Yashima-higashi, Takamatsu, Kagawa, 761- 0111 Japan 3 Chlorella Industry Co., Ltd., 1343 Hisadomi, Chikugo, Fukuoka 833-0056, Japan 4 National Research Institute of Fisheries Science, Japan Fisheries Research and Education Agency, 2-12-4 Fukuura, Kanazawa, Yokohama, Kanagawa 236-8648, Japan 5 School of Marine Science and Technology, Tokai University, 3-20-1 Orido, Shimizu, Shizuoka, 424- 8610, Japan Abstract: Live specimens of two freshwater shrimps, Palaemon paucidens De Haan, 1844 and P. sinensis (Sollaud, 1911) can be distinguished from the specific carapace color patterns. However, color pattern of spec- imen preserved in ethanol or diluted formalin slowly fades and is eventually lost. We re-examined previous information and chose the number of plumose setae on distal end of telson and appendix masculina as new identification characters. Number of plumose setae (average, range) was more in P. sinensis (9.0, 4-14) than in P. paucidens (A type, 2.1, 2-3; B type, 2.0, 1-3). Form and lateral setae arrangement of appendix masculina were found to be different between these two species. These characters cannot be applied to females and young males as well as individuals with a malformed telson.
    [Show full text]
  • Evaluation of the Bioactivities of Water-Soluble Extracts from Twelve Deep-Sea Jellyfish Species
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Springer - Publisher Connector Fish Sci (2013) 79:487–494 DOI 10.1007/s12562-013-0612-y ORIGINAL ARTICLE Chemistry and Biochemistry Evaluation of the bioactivities of water-soluble extracts from twelve deep-sea jellyfish species Takenori Kawabata • Dhugal J. Lindsay • Minoru Kitamura • Satoshi Konishi • Jun Nishikawa • Shuhei Nishida • Michiya Kamio • Hiroshi Nagai Received: 27 October 2012 / Accepted: 27 February 2013 / Published online: 10 April 2013 Ó The Author(s) 2013. This article is published with open access at Springerlink.com Abstract Many polypeptides isolated from shallow water methanol-treated crude jellyfish extracts lost their bioac- cnidarian species have been utilized as valuable biochem- tivities. Thus, it is likely that the bioactive compounds in ical tools in both basic and applied biological sciences. the water-soluble extracts were unstable polypeptides Deepwater cnidarian species might be another potential (proteins). This is the first published report on bioactivities resource for novel biochemical tools. However, because of in extracts from deep-sea jellyfishes. limited access to cnidarian samples from deep-sea envi- ronments, bioactive polypeptides have never before been Keywords Jellyfish Á Cnidarian Á Deep-sea Á Bioactivity Á reported from this group. In this study, we collected twelve Natural product Á Toxin Á Bioresource deep-sea jellyfish species (nine hydrozoans and three scyphozoans) using a plankton net that was specially designed for collecting deep-sea organisms, and prepared Introduction water-soluble extracts, presumably containing polypep- tides, of these jellyfishes. The extracts were subjected to Polypeptides produced by cnidarians can have unique cytotoxicity, hemolytic activity, and crustacean lethal structures and bioactivities.
    [Show full text]
  • Crustacean Research 47: 73-88 (2018)
    Crustacean Research 2018 Vol.47: 73–88 ©Carcinological Society of Japan. doi: 10.18353/crustacea.47.0_73 Tachaea chinensis (Isopoda: Corallanidae), an ectoparasite of freshwater shrimps and prawns, from western Japan, with a list of its known collection localities and hosts Kazuya Nagasawa, Tadashi Imai, Hidetoshi Saito Abstract.̶ The corallanid isopod Tachaea chinensis Thielemann, 1910 is a parasite attached on the carapace of freshwater shrimps and prawns. The isopod is reported from Palaemon paucidens De Haan, 1884 (Palaemonidae) at two localities in Kagawa Prefecture (Shikoku) and two localities in Shimane Prefecture (western Honshu), and from Neocaridina sp. (Atyidae) at one locality in Shimane Prefecture, Japan. This represents the first record of T. chinensis from Shikoku. The species is briefly described and illustrated based on non-ovigerous females. Prevalence of T. chinensis in populations of P. paucidens and Neocaridina sp. ranged from 10.7–57.1%, and the intensity of infestation was almost constantly one, which indicates its intra-specific competition on the host carapace. Palaemon paucidens is considered as a preferred host of T. chinensis in Honshu and Shikoku, Japan. Based on the literature published between 1910 and 2018 including this paper, T. chinensis has been reported from 14 nominal and some unidentified species of shrimps and prawns belonging to three atyid genera (Caridina, Neocaridina, and Paratya), two palaemonid genera (Macrobrachium and Palaemon), and one penaeid genus (Penaeus), ranging from temperate (Honshu, Shikoku, and Kyushu in Japan, and central-eastern China) through subtropical (Okinawa in Japan, and Hong Kong in southeastern China) to tropical (Hainan in southeastern China, Vietnam, Thailand, and Malaysia) regions in East Asia.
    [Show full text]
  • Reproduction and Growth of the Freshwater ... -.:: GEOCITIES.Ws
    © Triveni Enterprises, Lucknow (India) J. Environ. Biol. ISSN : 0254-8704 29(2), 163-168 (2008) http : //www.geocities.com/j_environ_biol/ [email protected] Reproduction and growth of the freshwater prawn, Palaemon paucidens (Decapoda: Palaemonidae) in a lake of Korea Jong Chun Kim 1, Chae Woo Ma* 1, Chul Woong Oh 2 and Sang Gyu Paik 3 1Department of Marine Biotechnology, Soonchunhyang University, Asan, Chungnam - 336 745, Korea 2Department of Marine Biology, Pukyung National University, Busan - 336 745, Korea 3Marine Ecosystem and Environment Research Division, Korea Ocean Research and Development Institute, Ansan P.O. Box 29, 425 600, Korea (Received: April 09, 2007 ; Revised received: August 02, 2007 ; Accepted: September 15, 2007) Abstract: This study analyzed the reproduction and growth of freshwater prawn, Palaemon paucidens De Haan 1844 from Suk-dang lake( Korea). The analysis of the sex ratio showed a higher proportion of males than that of females. The average size of the eggs was 6.12 (± 0.55) mm 3 in the non-eyed stage (stage A) and 7.20(±0.86)mm 3 in the eyed stage (stage B). The reproductive output (RO) calculated with the dried-body weight of an incubating female and the weight of the eggs in dried condition was 26.97% (n = 17) of the average females weight. Incubating prawn appeared in April, and the gonadosomatic indices(GSI) showed the highest value during three months from January to March. Based on the month when there was a high proportion of incubating females with a high GSI, the estimated spawning season of P. paucidens was April.
    [Show full text]