3(1)_93-94

3 pages
68 views

Please download to get full document.

View again

of 3
All materials on our website are shared by users. If you have any questions about copyright issues, please report us to resolve them. We are always happy to assist you.
Share
Description
book
Tags
Transcript
  Biodiversity Journal  , 2012, 3 (1): 93-95 A new species of genus Laubuca Bleeker, 1860 cyprinidfish from Bangladesh (Cypriniformes, Cyprinidae) Sh Kn 1 , Swn Sks 2 & Chch Nn 3 1 Department of Fisher Manaement, Facult of Fisheries, Kasetsart Universit, Bankok, Thailand 10900; e-mail: kulab-ton2011@mail.com. 2 Reference Collection Room, Inland Fisheries Resources Research and Development Institute, Department of Fisheries, Thailand10900; e-mail: Siriwan.suksri@mail.com. 3 534/26 Soi Phaholothin 58 Phaholothin Rd. Sai Mai, Bankok, Thailand; e-mail: sorn133@hotmail.com. ABSTRACT KEY WORDS Received 02.03.2012; accepted 20.03.2012; printed 30.03.2012 A new species of cprinid fish (Cpriniformes, Cprinidae),  Laubuca brahmaputraensis n.sp. from Brahmaputra River, Banladesh, is described. This species is distinuished fromother species of enus  Laubuca Bleeker, 1860 b the combination of the followin characters:lateral line scales comprisin 31-32 + 1-2 scales, transverse line scales of ½6-½7/ 1 / 2½ -3½ scales, bod depth ranin from 25.1 to 29.3 % Standard lenth (SL), pelvic fin not rea-chin beond the anus, anal fin with 3 unbranched ras and 19½-20½ branched ras, black  blotch above the pectoral fin base and no tubercles on lower jaw.  Laubuca ; Cprinidae; Brahmaputra River; Banladesh; new species. INTRODUCTION Freshwater fishes enus  Laubuca Bleeker,1860 (Pisces, Cpriniformes, Cprinidae) has been reported for Indian subcontinent and Indo-Australian archipelao (Hamilton, 1822; Weber & de Beaufort, 1916; Smith, 1931; Menon, 1952;Silas, 1958; Deraniaala, 1960; Pethiaoda etal., 2008).Currentl the enus  Laubuca comprises eihtvalid species:  L. caeruleostigmata Smith, 1931from Thailand;  L. laubuca (Hamilton, 1822) wi-del distributed in Indian subcontinent and Indo-Australian archipelao;  L. dadyburjori Menon,1952 and  L. fasciata Silas, 1958 from India;  L.lankensis Deraniaala, 1960 from Sri Lanka; and  L. insularis ,  L. ruhuna and  L. varuna described b Pethiaoda et al. (2008) from Sri Lanka.In Banladesh, Ataur Rahman (2003) reportedthat  L. laubuca is the onl species of enus  Laubuca found in the countr area.In October 1995, the inland aquarium fishcollector who cauht all the specimens of   Lau-buca emploed in this stud (collection site:Brahmaputra River, Banladesh), sent these spe-cimens to the Inland Fisheries Resources Rese-arch and Development Institute, Department of Fisheries, Thailand [NIFI] under the name  L.laubuca [NIFI 2799].In 2012 after havin reviewed all the speci-mens sent b Mr. Kittipon Jaruthanin, we con-cluded that these fish are sinificantl differentnot onl from specimens belonin to  L. laubuca as described b Ataur Rahman (2003) from Ban-ladesh, but also from all other species of   Lau-buca hitherto known, b the combination of thefollowin characters: lateral line scales, tran-sverse line scales, bod depth, caudal peduncledepth, fin ras and the absence of tubercles onlower jaw.Hence, the population collected from Brahma- putra River is described herein as a new species.  S. K ulabtoNg , S. S uKSri & C. N oNpayom  Laubuca brahmaputraensis n. sp.E xAMINEDMATERIAL .Holotpus, NIFI 4532: Brah-maputra River, Banladesh, 12.x.1995, leit Kit-tipon Jaruthani, (Fi. 1); Paratpi, NIFI 2799: 2specimens, same data of holotpus.D ESCRIPTIONOFHOLOTyPUS (seual eternal charac-ters cannot be specified).  L. brahmaputraensis n.sp. is slender, bod depth is 26.1%SL. The fish isver compress, bod width is 8.7 %SL. Scales inlateral series are medium to lare, lateral line scalesinclude 31 + 1-2 scales, transverse line scales on bod comprises ½6 - ½7/ 1 / 2½ -3½ scales and pre-dorsal scales are 16. Head lenth (HL) is 24.1 %SL,head depth (HD) is more than half of bod depth(BD) and head lenth (66.6 %BD or 72.2 %HL or 17.4 %SL). The ee is lare, ee diameter is36.1%HL (50.0 %HD or 8.7 %SL). Post orbitallenth is 38.9 %HL (10.7 %SL), snout lenth isshort, with 18.1 %HL (4.3 %SL) and interorbitalwidth is 51.4 % HL (12.4 % SL) loner than postor- bital width (44.4 %HL or 10.7 %SL).Dorsal fin oriin is posterior behind anal fin ori-in, predorsal fin lenth is 66.9 %SL, prepectoralfin lenth is 31.4 %SL, prepelvic fin lenth is48.2 %SL and preanal fin lenth is 66.9 %SL. Cau-dal peduncle depth is 9.8 %SL. Pectoral fin is lon but not reachin beond the anus, the pectoral finlenth is 31.4 %SL and 9 branched fin ras.Pelvic fin is short not reachin beond anus, the pelvic fin lenth is 20.1 %SL and 5 branched finras. Anal fin base is loner than dorsal fin base,the anal fin base lenth is 28.4 %SL, dorsal fin with3 unbranched ras and 8 branched ras and anal finwith 3 unbranched ras and 19½ branched ras. Thedorsal fin base lenth is 12.7 %SL.V ARIABILITy . 30.7-33.9 mm SL. Variation of maleand female are unknown.E TyMOLOgy .from Brahmaputra River, Banladesh,where this species was collected.D ISTRIBUTION . This species is known onl fromBrahmaputra River, Banladesh.C OMPARATIVENOTES .  L. brahmaputraensis n. sp. isdistinuished from other species of enus  Laubuca  b the combination of the followin characters:lateral line scales complete, with 31-32 + 1-2 scales;transverse line scales on bod showin ½6 - ½7/ 1 /2½ - 3½ scales; bod is slender, bod depth is25.1-29.3 %SL; caudal peduncle depth is 8.9-9.8 %SL; anal fin with 3 unbranched ras and 19½-20½ branched ras; pelvic fin is short (43.2-83.3 %HL) not reachin beond the anus; a black  blotch above the pectoral fin base; lower jaw smo-oth, lackin tubercles on skin.Particularl,  L. brahmaputraensis n. sp. isclearl different from  L. caeruleostigmata of Thai-land in man characters: bod depth is 3.4-4.0 timesSL (in  L. caeruleostigmata is 2.25), lateral line sca-les includes 31-32 scales (vs 34-35 scales in  L. cae-ruleostigmata ).Moreover,  L. brahmaputraensis n.sp. has one black blotch above the pectoral fin base (vs. 4-5dark vertical stripes above pectoral fin base on sidesof bod in  L. caeruleostigmata ) (Smith, 1931;Smith, 1945; Silas, 1958).  L. brahmaputraensis n.sp. is different fromother species of enus  Laubuca of Sri Lanka b thecombination of the followin characters: lower jawsmooth, lackin tubercles on skin (vs. some denseltubercles in  L. insularis and  L. lankensis ); pelvic finis short not reachin beond the anus (vs. a lon pelvic fin reachin beond posterior anal fin oriinin  L. insularis ); bod depth is 25.1-29.3 %SL (vs.32.8-34.6 %SL in  L. ruhuna , 27.9-32.4 %SL in  L. varuna , 27.2-29.8 %SL in  L. lankensis , and 26.0-28.8 %SL in  L. insularis ); anal fin is 19½-20½ branched ras (vs. 15½ -17½ in  L. varuna , 17-18½in  L. ruhuna , 17½ -19½ in  L. insularis , and 16½-20½ in  L. lankensis ) (Pethiaoda et al., 2008).  L. brahmaputraensis n.sp. is distinuished from  L.dadyburjori of India b a complete lateral line sca-les (vs. an incomplete one in  L. dadyburjori ).  L. dadyburjori has a black stripe on lateral se-ries, with 2-5 black circular spots on it, the stripe isetend from the anterior of ee to caudal pedunclewhereas  L. brahmaputraensis n. sp. does not showan black stripe alon the bod (Menon, 1952;Silas, 1958).  L. brahmaputraensis n. sp. is distin-uished from  L. fasciata of India b short pelvic finnot reachin beond the anus (vs. a lon pelvic finreachin beond the anus in  L. fasciata ), lower jawsmooth (vs. scattered tubercles in  L. fasciata ), a black blotch above the pectoral fin base (vs. a black lonitudinal stripe in  L. fasciata ); anal fin shows19½ – 20½ branched ras (vs. 14½ - 16½ in  L. fa- sciata ) (Pethiaoda et al., 2008; Silas, 1958). 94   L. brahmaputraensis n. sp. is distinuished from  L. laubuca of Banladesh b bod depth which is3.4-4.0 times SL (vs. 2.7-3.3 times SL or 3.5-4.2times total lenth,TL, in  L. laubuca ), lateral linescales comprises 31-32 scales (vs. 34-36 in  L. lau-buca ), branched anal fin ras include 19½-20½ branched ras (vs. 18-19 in  L. laubuca ), predorsalscales are 16-17 (vs. 20-21 in  L. laubuca ) (Ataur Rahman, 2003). ACKNOWLEDGEMENTS The authors are rateful to reviewers for revie-win this manuscript. A special thank to Mr. Kitti- pon Jaruthanin, who collected all the specimens of   L. brahmaputraensis n. sp. emploed in this stud.We wish to thank Dr. Rohan Pethiaoda,Wildlife Heritae Trust in Sri Lanka and Dr. SorinStefanut, Institute of Biolo Bucharest, RomanianAcadem, Romania for providin the oriinal de-scription of man species of enus  Laubuca . REFERENCES Ataur Rahman A.K., 2003. Freshwater Fishes of Ban-ladesh. Second Edition. Zooloical Societ of Banladesh, Dhaka. 394 pp.Deraniaala P.E.P., 1960. A new subspecies of thefish Chela laubuca from Celon. Spolia Zelanica,29: 17.Hamilton F., 1822. An account of the fishes found inthe river ganes and its branches. Edinburh &London, 405 pp.Menon A.g.K., 1952. Notes on fishes in the IndianMuseum. xLVI. On a new fish of the enus  Lau-buca from Cochin. Records of the Indian Museum(Calcutta), 49: 1-4.Pethiaoda R., Kottelat M., Silva A., Maduwae K.& Meeaskumbura M., 2008. A review of the enus  Laubuca in Sri Lanka, with description of threenew species (Teleostei: Cprinidae). IchtholoicalEploration of Freshwaters, 19: 7-26.Silas E.g., 1958. Studies on cprinid fishes of the orien-tal enus Chela Hamilton. Journal of the Bomba Natural Histor Societ, 55: 54-99.Smith H.M., 1931. Descriptions of new enera and spe-cies of Siamese fishes. Proceedins of the United Sta-tes National Museum, v. 79 (no. 2873), 48 pp.Smith H.M., 1945. The fresh-water fishes of Siam, or Thailand. Bulletin of the United States National Mu-seum, No. 188, 622 pp.Weber M. & de Beaufort L.F., 1916. The fishes of theIndo-Australian Archipelao. III. Ostariophsi: IICprinoidea, Apodes, Snbranchi. 455 pp.  A new species of genus Laubuca Bleeker, 1860, cyprinid fish from Bangladesh (Cypriniformes, Cyprinidae) Fiure 1.  Laubuca brahmaputraensis n. sp. from Brahmaputra River, Banladesh. 95
Related Search
We Need Your Support
Thank you for visiting our website and your interest in our free products and services. We are nonprofit website to share and download documents. To the running of this website, we need your help to support us.

Thanks to everyone for your continued support.

No, Thanks