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

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.

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Abstract

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.

Item Type:Article
Uncontrolled Keywords:surgeonfish; Acanthrurus triostegus; Minicoy; Lakshadweep
Subjects:Demersal Fishes
Marine Ecosystems > Coral Reefs
Divisions:CMFRI-Cochin > Biodiversity
ID Code:1174
Deposited By:Edwin Joseph
Deposited On:21 Jun 2010 13:10
Last Modified:21 Jun 2010 13:10

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