Seed shrimps
Upcoming SlideShare
Loading in...5
×
 

Seed shrimps

on

  • 520 views

 

Statistics

Views

Total Views
520
Views on SlideShare
520
Embed Views
0

Actions

Likes
0
Downloads
1
Comments
0

0 Embeds 0

No embeds

Accessibility

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

    Seed shrimps Seed shrimps Presentation Transcript

    • ““Freshwater seed shrimps (Ostracoda:Freshwater seed shrimps (Ostracoda:Podocopida) from lakes of Sindh, Pakistan”Podocopida) from lakes of Sindh, Pakistan”Mukhtiar Ahmed MaharMukhtiar Ahmed MaharMukhtiar Ahmed MaharMukhtiar Ahmed MaharDepartment of Fresh Water Biology and Fisheries,Department of Fresh Water Biology and Fisheries,University of Sindh, Jamshoro, Sindh, Pakistan.University of Sindh, Jamshoro, Sindh, Pakistan.
    • IntroductionIntroductionOstracodes are referred as “seed Shrimps” because due to their shapeOstracodes are referred as “seed Shrimps” because due to their shapeand small size, they look like small seeds.and small size, they look like small seeds.The body is enclosed in a bivalve, calcified shell (carapace).The body is enclosed in a bivalve, calcified shell (carapace).They are found in marine, brackish and freshwaters.They are found in marine, brackish and freshwaters.Order Ostracoda is divided into three suborders (i) Myodocopida (ii)Order Ostracoda is divided into three suborders (i) Myodocopida (ii)Platycopida and (iii) Podocopida. First two suborders are represented inPlatycopida and (iii) Podocopida. First two suborders are represented inmarine and members of the third are found in freshwater (Pennak,marine and members of the third are found in freshwater (Pennak,2001). About 5000 species of Ostracodes are known from various2001). About 5000 species of Ostracodes are known from varioushabitats (Oliverhabitats (Oliver et al.et al., 2000)., 2000).They play important role in aquatic ecosystem as source of natural food forThey play important role in aquatic ecosystem as source of natural food forbenthivorous fish.benthivorous fish.As there is paucity of data on Ostracodes of Pakistan, present study wasAs there is paucity of data on Ostracodes of Pakistan, present study wasinitiated to supply baseline information for future research.initiated to supply baseline information for future research.
    • MATERIALS AND METHODSMATERIALS AND METHODSThree lakes of Sindh, Keenjhar (Distt: Thatta), Manchhar (Distt: Dadu) andThree lakes of Sindh, Keenjhar (Distt: Thatta), Manchhar (Distt: Dadu) andChotiari (Distt: Sanghar) were surveyed for the collection of seed shrimpsChotiari (Distt: Sanghar) were surveyed for the collection of seed shrimpsduring 2008-09.during 2008-09.Random sampling was carried-out by using No. 25 plankton net (mesh sizeRandom sampling was carried-out by using No. 25 plankton net (mesh size55µm).55µm).Some specimens were also collected from algal mates in shallow, weedySome specimens were also collected from algal mates in shallow, weedymarginal areas.marginal areas.The samples were preserved in 5% formalin solution for studies in theThe samples were preserved in 5% formalin solution for studies in thelaboratory.laboratory.Identification was carried with the help of taxonomic keys (Ward andIdentification was carried with the help of taxonomic keys (Ward andWhipple, 1976, Bronshtein, 1988 and Pennak, 2001).Whipple, 1976, Bronshtein, 1988 and Pennak, 2001).Photographs were taken with a digital camera DCM 35 (350 K Pixels, USBPhotographs were taken with a digital camera DCM 35 (350 K Pixels, USB1.0, mounted on the trinocular microscope (Nikon, Eclips E-200 and Swift1.0, mounted on the trinocular microscope (Nikon, Eclips E-200 and Swift300-D).300-D).
    • ResultsResults Five genera and species of seed shrimpsFive genera and species of seed shrimpsrecorded from Pakistan in the presentrecorded from Pakistan in the presentstudy.study.
    • Table 1. List of Ostracodes reported from PakistanTable 1. List of Ostracodes reported from PakistanGurney (1920) (Nushki, Baluchistan)Gurney (1920) (Nushki, Baluchistan) Cyprinotus incongruensCyprinotus incongruens Ilyocypris bradyiIlyocypris bradyi (Sars, 1890)(Sars, 1890) Eucypris puberaEucypris pubera (Yooung)(Yooung) Cypridopsis dentomarginatusCypridopsis dentomarginatus (Dady)(Dady) Limnicythere inopinitaLimnicythere inopinita (Baraid)(Baraid) Ptamocypris villosaPtamocypris villosa (Jurine)(Jurine)Arora (1931) (Lahore, Punjab)Arora (1931) (Lahore, Punjab) Ilyocypris bradyiIlyocypris bradyi (Sars, 1890)(Sars, 1890) Cypris reticulateCypris reticulate (Zaddach, 1844)(Zaddach, 1844) Cyprinotus crenaCyprinotus crena (Turner, 1893)(Turner, 1893) C. chandraiC. chandrai (Arora, 1931)(Arora, 1931) C. incongruensC. incongruens (Ramdoler , 1808)(Ramdoler , 1808) Eucyprus mathaiEucyprus mathai (Arora, 1931)(Arora, 1931) E. kumariE. kumari (Arora, 1931)(Arora, 1931) Stenocypris malcomcomsoniStenocypris malcomcomsoni (Brady, 1886)(Brady, 1886) Cypretta globulusCypretta globulus (Sars, 1889)(Sars, 1889) Cypria devaiCypria devai (Arora, 1931)(Arora, 1931)Mahoon and Sultana (1977) (Lahore, Punjab)Mahoon and Sultana (1977) (Lahore, Punjab) Stenocypris fontinalesStenocypris fontinales (Vaura, 1891)(Vaura, 1891)Arora (1935) (Karachi, Sindh)Arora (1935) (Karachi, Sindh) Cypria medianaCypria mediana Cyclocypris globosaCyclocypris globosa Stenocypris malcomsoniStenocypris malcomsoni (Brady, 1886)(Brady, 1886) Cypretta nigraCypretta nigra Cyprinotus madyensisCyprinotus madyensis Cyprinotus fretensCyprinotus fretens Present Study (Lower Sindh)Present Study (Lower Sindh) Cypris subglobosaCypris subglobosa (Sowerby.1840)(Sowerby.1840) Eucypris virensEucypris virens (Jurine, 1820)(Jurine, 1820) Dolerocypris sinensisDolerocypris sinensis (Sars, 1903)(Sars, 1903) Herpetocypris fontinalisHerpetocypris fontinalis (Bronshtein, 1928)(Bronshtein, 1928) Cypridopsis obesaCypridopsis obesa (Brady and Robertson, 1870)(Brady and Robertson, 1870)
    • Cypris subglobosaCypris subglobosa (Sowerby, 1840)(Sowerby, 1840)Shell some what globular in dorsal view,Shell some what globular in dorsal view,length 1.19 mm,length 1.19 mm,height 0.7mm,height 0.7mm,width 0.62mm,width 0.62mm,
    • Eucypris virensEucypris virens (Jurine, 1820)(Jurine, 1820) Shell somewhat beanShell somewhat beanshaped.shaped. Length 1.97mm andLength 1.97mm andheight 1.06mm .height 1.06mm .
    • Dolerocypris simensisDolerocypris simensis (Sars, 1903)(Sars, 1903) Shell elongated, slightlyShell elongated, slightlyconvex dorsally, ventral marginconvex dorsally, ventral marginstraight.straight. Length 2.02mm, widthLength 2.02mm, width0.72mm. Anterior margin more0.72mm. Anterior margin morerounded then posterior.rounded then posterior. Anterior margin bears marginalAnterior margin bears marginalbristles.bristles. Shell fairly transparent,Shell fairly transparent,yellowish brown in colour, ayellowish brown in colour, ayellowish green spot extendsyellowish green spot extendsacross the shell. Six,across the shell. Six,elongated muscle attachmentelongated muscle attachmentscars visible in the centre ofscars visible in the centre ofshellshell
    • Herpetocyperis fontinalisHerpetocyperis fontinalis (Bronshtein, 1928)(Bronshtein, 1928) Shell elongated, surfaceShell elongated, surfacecovered with small setae.covered with small setae. Length 1.49 mm, widthLength 1.49 mm, width0.49 mm and height 0.540.49 mm and height 0.54mm.mm. Anterior portion of shellAnterior portion of shellbroadly rounded, whilebroadly rounded, whileposterior portion distinctlyposterior portion distinctlynarrow.narrow.
    • Cypridopsis obesaCypridopsis obesa (Brady and Robertson, 1877)(Brady and Robertson, 1877) Shell roughly sub-globular,Shell roughly sub-globular,anterior side broadly roundedanterior side broadly roundedwhile posterior end truncated.while posterior end truncated. Length 0.67 mm, width 0.4 mmLength 0.67 mm, width 0.4 mmand height 0.34 mm.and height 0.34 mm.
    • ConclusionConclusion Gurney (1920) reported six species from westernGurney (1920) reported six species from westernBalochistan, while Arora (1931, 1935) recorded 10Balochistan, while Arora (1931, 1935) recorded 10species from Lahore city and 6 species from Karachispecies from Lahore city and 6 species from Karachiarea respectively. Later on, one speciearea respectively. Later on, one specie StenocyprisStenocyprisfontinalisfontinalis was reported from Lahore area (Mahoon andwas reported from Lahore area (Mahoon andSultana, 1977; ChowdhrySultana, 1977; Chowdhry et alet al., 1986). As two species., 1986). As two speciesare common from Sindh and Balochistan, in all 21are common from Sindh and Balochistan, in all 21species have already been reported from Pakistan thespecies have already been reported from Pakistan thepresent new record of 5 species from Pakistan (Lowerpresent new record of 5 species from Pakistan (LowerSindh) is an addition to already known freshwaterSindh) is an addition to already known freshwaterOstracod fauna of Pakistan.Ostracod fauna of Pakistan.
    • ThanksThanks