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Title: Age, growth and reproductive biology of Goldlined Seabream Rhabdosargus sarba (Pisces: Sparidae) in coastal waters of Pakistan
Authors: Amir, Shabir Ali
Panhwar, Sher Khan
Siddiqui, Pirzada J. A.
Khan, Fozia
Rashid, Shehnaz
Zhenjiang, Ye
Keywords: Rhabdosargus sarba;Age;Growth;Sexual maturity;Spawning season;Pakistan
Issue Date: Jul-2018
Publisher: NISCAIR-CSIR, India
Abstract: For the examination of age, growth and reproductive aspects of R. sarba, 504 specimens were sampled from Karachi fish landing site (May 2010 - April 2011), ranging from 9.8 to 33.7 cm in standard length and 38.68 to 1164 g in weight. Standard length-weight relationship for combined sexes was estimated W=0.052*SL2.893 (R2=0.984). Age and growth were determined by sectioning and interpretation of otolith of 230 fishes (15 to 20 in each month). Age was estimated from 0 – 7 years while the length-at-age data from combined sexes was fitted by von Bertalanffy model: SLt = 29.23 (1-e-0.115(t+1.3384)) (R2 = 0.94). The overall sex ratio was 1:1.4 males (43%) to females (57%), and significantly in favor of females. Gonadosomatic indices were high from November to February and the macroscopic examination and histology of gonads indicates that spawning occurred in winter to early spring with peak in January.
Page(s): 1478-1485
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Appears in Collections:IJMS Vol.47(07) [July 2018]

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