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On the biology of the flat mouthed catfish Tachysurus platystomus (Day) from Mandapam

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Relation http://eprints.cmfri.org.in/451/
 
Title On the biology of the flat mouthed catfish
Tachysurus platystomus (Day) from Mandapam
 
Creator Menon, N G
 
Subject Catfish
 
Description As determined from length-frequency studies, one-, two-, three- and fouryear-
old fish respectively attain 178, 256, 310 and 366 mm size. As indicated by
the opercular bone, the corresponding sizes were at 173, 256, 349 and 387 mm
and as by vertebrae, they were 177, 272, 340 and 388 mm. Von Bertalanffy growth
curve, fitted to the estimates of lengths at ages derived from opercular bone, is
given as:
Lj = 497.5 r , _ g - 0 35767 (1^(0.2305))'
The length-weight relationship was significantly different for males and females.
The low values of relative condition factor during December-February period
was due to spawning. Yolked larvae were found to feed on planktonic organisms,
even when they were in the mouth of the male parent. Even though the individuals
of the species spawn only once and over a short period, the population as a whole
may probably breed over November to February every year. Females and males
first mature at 230 and 220 mm respectively. Fecundity varied from 32 to 40 ova
in fish ranging from 230 to 390 mm in total length.
 
Publisher CMFRI/ICAR
 
Date 1984
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://eprints.cmfri.org.in/451/1/Article_14.pdf
Menon, N G (1984) On the biology of the flat mouthed catfish Tachysurus platystomus (Day) from Mandapam. Indian Journal of Fisheries, 31 (2). pp. 293-308.