Record Details

Hatchery production of juveniles of pharaoh cuttlefish, Sepia pharaonis (Ehrenberg,1831) from stranded eggs and sea ranching along the Thoothukudi coast

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Relation http://eprints.cmfri.org.in/16501/
http://op.niscpr.res.in/index.php/IJMS/article/view/36962
10.56042/ijms.v51i04.36962
 
Title Hatchery production of juveniles of pharaoh cuttlefish, Sepia pharaonis (Ehrenberg,1831) from stranded eggs and sea ranching along the Thoothukudi coast
 
Creator Kavitha, M
Jagadis, I
Linga Prabu, D
Kalidas, C
Ranjith, L
Willington, S
 
Subject Cephalopods
Hatchery
Molluscan Fisheries
 
Description Accidentally entangled and stranded egg masses of Sepia pharaonis in fishing gears were collected from various landing
centres of Thoothukudi district. The stranded egg masses were incubated, hatched and larval rearing was carried out at the
Molluscan Fish Hatchery of Tuticorin Research Centre of CMFRI. The average hatching rate of S. pharaonis was 95 % for
the eggs collected from the fishing nets. The size of day 1 paralarvae of S. pharaonis was 5.46±0.06 mm and reached the
average size of 40.10±1.15 mm length and 9.6±0.20 g weight on day 60 with the average survival rate of 70 %. Maximum
weight gain (%) was noticed between 20 – 40 days. The paralarvae of S. pharaonis fed with suitable live feeds until 50 days,
after which fed with dead fish and shrimp. The juveniles were transformed as broodstock with an average length of
137.4±8.08 mm and weight of 229.7±21.54 g on 180th day of culture. In the hatchery, the first captive spawning was
witnessed on 167th day and the eggs laid by the females ranged from 46 – 118. However, the captive bred egg masses failed
to hatch out. Therefore, the hatchery technology needs to be perfected through the development of nutritionally improved
broodstock diet to ensure better hatching. During the years 2016 – 2018, altogether 8400 numbers of hatchery reared 60
days old juveniles of S. pharaonis were ranched into the fishing grounds off Tuticorin coast. The biological significance of
sea ranching activities to replenish the natural stocks requires further research and evaluation.
 
Publisher National Institute of Science Communication and Policy Research
 
Date 2022
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/16501/1/Indian%20Journal%20of%20Geo-Marine%20Sciences_2022_Ranjith%20L.pdf
Kavitha, M and Jagadis, I and Linga Prabu, D and Kalidas, C and Ranjith, L and Willington, S (2022) Hatchery production of juveniles of pharaoh cuttlefish, Sepia pharaonis (Ehrenberg,1831) from stranded eggs and sea ranching along the Thoothukudi coast. Indian Journal of Geo-Marine Sciences, 51 (4). pp. 322-326. ISSN 0379-5136