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Studies on ecology, chemical constituents and culture of marine macroalgae of Minicoy Island, Lakshadweep

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Relation http://eprints.cmfri.org.in/7110/
 
Title Studies on ecology, chemical constituents and culture of marine macroalgae of Minicoy Island, Lakshadweep
 
Creator Koya, C N Haneefa
 
Subject Theses
Algae
Algal Culture
 
Description The Union Territory of Lakshadweep is situated in the
Arabian Sea about 200 to 400 km off the Kerala coast. This
archipelago consists of 36 islands and five s.ubmerged banks
with a total area of 32 sq. km .The islands lie between 08° 00 -
12° 30' N latitude and 71 ° 00 - 74° 00 E longitude. These
islands consist of coral formation built on submerged ridge
raising steeply from a depth of about 1500 to 4000 m in the
Arabian Sea. The Lakshadweep, Maldives and Chagos
archipelagos foon an uninterrupted chain of coral atolls and
reefs on a submarine bank covering a distance of over 2000 km.
Most of these islands have sandy beaches with gentle slope on
the lagoon side and on the seaward side there is a steep slope
with boulders, coral rocks, living corals and debris. Corals
cannot grow very deep in the oceans and what is seen at present
depicts millennia of interaction between the submarine bank,
tectonic activity and the level of the oceans, particularly during
the Pleistocene period (Jones, 1986).
Coral reef ecosystems are the most diverse and
colourful of any communities with the most complex
interrelationship between species. Corals grow where the mean
sea temperature is at least 20 °C throughout the year, preferably
more than 23 °C. They also need clean sea water and are wlable
to grow where rivers dilute the sea or bring in mud. Coral reef
communities may be very old and their foonation is a result of
persistent accumulation of calcareous deposits over long
periods, extending from hundred to thousands of years (Qasim,
1998). Coral reefs are of three types: (I) Barrier reefs along
continents (2) Fringing reefs around islands (3) Atolls, broken
fringes of reef and islands around a central lagoon. The IndoPaci
fic region is particularly rich in corals. The Australian
Great Barrier Reef is an intermittent series of reefs stretching
over 1900 km along the coast of Queensland. Other coastal
reefs lie off East Africa and in the Red Sea. The Pacific and the
Indian Oceans have thousands of atolls. In the West Atlantic,
coastal reefs extend 200 km. southwards from Yucatan and
many Caribbean islands are fringed with coral reefs. The corals
are coelenterate polyp animals which extent their tentacles at
night to feed on zooplankton washed over the reefs. Their
tissues house symbiotic green algae (zooxanthillae).
Zooxanthillae and other algae living in or on their calcareous
skeleton conduct photosynthesis in the sunlight. Many reefs are
in trade wind belts, the windward side being exposed to wave
action, the leeward side being sheltered. Reef systems are often
bioenergeticaly more or less self maintaining, complete
ecosystem in themselves, beautifully adapted to use, hoard or
recycle any inputs from the surroundings.
 
Date 2000
 
Type Thesis
NonPeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/7110/1/TH-86_Han.pdf
Koya, C N Haneefa (2000) Studies on ecology, chemical constituents and culture of marine macroalgae of Minicoy Island, Lakshadweep. Doctoral thesis, Central Institute of Fisheries Education, Versova.