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Age and growth of the marine catfish Tachysurus thalassinus (Ruppell) from Mandapam waters

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Relation http://eprints.cmfri.org.in/398/
 
Title Age and growth of the marine catfish
Tachysurus thalassinus (Ruppell) from Mandapam waters
 
Creator Menon, N G
 
Subject Catfish
 
Description Employing six different methods, the age and growth of Tachysurus thalassinus
at Mandapam are determined. By length-frequency, it is found to attain
250 mm at the end of first year, 370 mm the end of second year and 450 mm
the end of third year. By the probability plot, four year-classes are recognized: I
to IV, respectively at 256 mm, 360 mm, 454 mm and 522 mm. Transparent rings
in the pectoral-spine sections showed that the species attains 258.3 mm at the end of
one year, 347.4 mm at the end of two years and 441.6 mm at the end of three
years. The lengths at age as derived from vertebral studies are 260.9 mm in one
year, 355.9 mm in two years and 436.5 mm in three years. Based on alternating
opaque and transparent zones in the opercular bone, the mean back-calculated
lengths at the ages one to three are 251.3 nmi, 345.5 mm and 445.1 mm, respectively.
The embryos of T. thalassinus reared in the aquarium, under controlled
conditions, showed, however, the rate of growth to be slightly higher. The von
Bertalanffy growth equation for this species can be expressed as:
Lt = 848.5 (l-e-0.t»885 (t0.8li3)
 
Publisher CMFRI/ICAR
 
Date 1986
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/398/1/Article_06.pdf
Menon, N G (1986) Age and growth of the marine catfish Tachysurus thalassinus (Ruppell) from Mandapam waters. Indian Journal of Fisheries, 33 (4). pp. 413-425.