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The biology of the convict surgeonfish Acanthurus triostegus triostegus (Linnaeus) from Minicoy Atoll, Lakshadweep

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Relation http://eprints.cmfri.org.in/1174/
 
Title The biology of the convict surgeonfish
Acanthurus triostegus triostegus (Linnaeus) from
Minicoy Atoll, Lakshadweep
 
Creator Mohan, Madan
Pillai, C S G
 
Subject Demersal Fishes
Coral Reefs
 
Description Acunthurus triostegus triostegus is the commonest acanthurid found in shallow intertidal reef
flats of Minicoy Atoll and other Lakshadweep Islands. The species exhibits inward and outward
movement on the reef flat along with the tides. It is a typical herbivore and feeds on filamentous and
segmented algae commonly found on dead and live coral boulders.
A common formula for both male and female of the species to establish the length-weight
relationship is derived as follows : Log W =: -4. 105377+2.766371 Log L.
At the end of the first year the species attains a total length of 128 mm and by the end of the
second year 167 mm. The ratio of males to females in the population for 1981-82 was 1 : 0.99 and
for 1982-83 was 1 :0.93 indicating a more or less equal proportior,.
The total number of matured eggs produced by an individual per spawning varies from 32,022
to 164,013. The size at first maturity at 50% level is 87 mm TL. The species has a protracted
breeding season extending almost throughout the year. It may spawn more than once in a breeding
season. The settlement of postlarvae occurs in tide pools and the size at first settlement is 25 mm,
Dispersal of the postlarvae from tide pools takes place after about two weeks of settlement.
 
Publisher MBAI
 
Date 1988
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/1174/1/JMBAI_Vol_30_No_1%262.pdf
Mohan, Madan and Pillai, C S G (1988) The biology of the convict surgeonfish Acanthurus triostegus triostegus (Linnaeus) from Minicoy Atoll, Lakshadweep. Journal of the Marine Biological Assocation of India, 30 (1&2). pp. 182-191.