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Octocorals in the Gulf Kaveh Samimi Namin Department of Marine Sciences, Khoram-Shahr University of Marine Sciences and Technology, Khuzestan province, Iran Phylum Cnidaria Class Anthozoa Subclass Octocorallia Order Alcyonacea Introduction : Specific characteristic of soft coral:

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slide1

Octocorals in the Gulf

Kaveh Samimi Namin

Department of Marine Sciences, Khoram-Shahr University of Marine Sciences and Technology, Khuzestan province, Iran

introduction

Phylum Cnidaria

Class Anthozoa

Subclass Octocorallia

Order Alcyonacea

Introduction :

specific characteristic of soft coral
Specific characteristic of soft coral:
  • Each polyp bears eight hollow tentacles ,which are fringed on both sides by one or several rows of pinnules.
slide4

What we know already ?

  • History of research about corals back to year 1911 by Harisson , Rosen 1971, Danish scientific investigations 1934, Harington 1976, Harger 1984, Sheppard 1991, in 1992 Shepperd reported Dendronephthya in west coast of Musandam.
  • He noted that the Gulf is almost completely lacking in soft coral .
  • In status of coral reef of the world 2004 , Rezai reported three genera of octocorallia ( Dendronephthya , Sarcophyton , Subergorgia ) from 7 islands that have been surveyed through 10 years.
slide7

East coast of Kish island during summer and autumn 2005 . ( Why east coast ? Because nobody fund this project, so east coast was easily accessible .)

slide8

Now, this study is doing in Hengam island .(in all coasts)

All around this island is about 50 km .Every 1-2 km will be checked. Now, north and west coasts are finished.

slide9

Material and Methods:

Underwater surveys is do with SCUBA diving. Each survey start from seashore to depth around 40 .(Depends on the sea floor profile)

What data recorded :

  • Physical parameters such as salinity, turbidity ,temperature
  • Substratum sampling for later sediment analysis.
slide10

Results:

Some new records !

slide11

Family Plexauridae:

Menellasp.Gray,1870

Colony shape: Branched and whip like

Sclerites: The characteristic sclerites form is leaf scale with tuberculate structure at one tip. the thorn scales of calyces with single ,long spine from warty base.

Habitat: Depth around 12, clear water, sandy rocky substratum.

slide13

Family Ellisellidae:

Junceella sp. Valenciennes,1855

slide14

Colony shape: Unbranched, whiplike

Sclerites: Surface have club shape Habitat :Sandy and muddy bottoms

slide15

Family Plexauridae :

Echinomuricea sp. Verrill,1869

slide16

Colony shape: branched

Sclerites : The major are the thorn scales of the calyces with single, long spine from warty base.

Habitat : Depth was around 12 m, with clear water ( visibility 8 m)

slide17

Family Plexauridae :

Dendronepthya sp. Kukenthal, 1905

Polyps: Monomorphic and not retractile

Colony shape: bushy

Habitat : depth above 10 , with clear water ( visibility 8 m)

slide18

Main threatening factors:

  • Collecting for ornamental uses !!!
  • Trawling for harvesting shrimp and fishes
  • Pollution
slide19

What’s the problem for study about them ???

  • Almost all of these studies are about hard corals, and there is not specific study on soft corals !!!
  • We don’t know what we have in the Gulf !!!
  • So how can we conserve something that we don’t have any information about that !!!
slide20

What’s the problem ???

  • There aren’t any scientific reports. Many local students have not published their works in international journals or symposiums, so finding this information in local unspecific magazines is very difficult.
  • Organizations that finance such taxonomic projects are too limited.
slide21

I would like to thank WWF for inviting and

supporting me

And also Dr. Leen Ofwegen

for all of his supports