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

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Title Statement <p>Hatchery production of juveniles of pharaoh cuttlefish, <em>Sepia pharaonis</em> (Ehrenberg, 1831) from stranded eggs and sea ranching along the Thoothukudi coast</p>
 
Added Entry - Uncontrolled Name Kavitha, M ; ICAR-Central Marine Fisheries Research Institute
Jagadis, I
Linga Prabu, D
Kalidas, C
Ranjith, L
Willington, S
ICAR-Central Marine Fisheries Research Institute
 
Uncontrolled Index Term Broodstock, Hatching rate, Paralarvae, Sea ranching, Sepia pharaonis, Survival rate
 
Summary, etc. Accidentally entangled and stranded egg masses of <em>Sepia pharaonis</em> 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 <em>S. pharaonis</em> was 95 % for the eggs collected from the fishing nets. The size of day 1 paralarvae of <em>S. pharaonis</em> 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<em> </em>paralarvae of <em>S. pharaonis</em> 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 180<sup>th</sup> day of culture. In the hatchery, the first captive spawning was witnessed on 167<sup>th</sup> 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<em> </em>juveniles of <em>S. pharaonis</em> 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.
 
Publication, Distribution, Etc. Indian Journal of Geo-Marine Sciences (IJMS)
2022-09-01 01:59:01
 
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http://op.niscair.res.in/index.php/IJMS/article/view/36962
 
Data Source Entry Indian Journal of Geo-Marine Sciences (IJMS); ##issue.vol## 51, ##issue.no## 04 (2022)
 
Language Note en
 
Nonspecific Relationship Entry http://op.niscair.res.in/index.php/IJMS/article/download/36962/465617804