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Pilot study on the growth performance of red seaweed, Gracilaria corticata in different salinities

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Relation http://eprints.cmfri.org.in/16048/
http://eprints.cmfri.org.in/16047/
 
Title Pilot study on the growth performance of red seaweed, Gracilaria corticata in different salinities
 
Creator Shilta, M T
Abhijith, Ramya
Vinod, K
Asokan, P K
Imelda, Joseph
 
Subject Seaweed
Aquaculture
Algae
 
Description Gracilaria, the third largest genus in the red algal group Rhodophyta is a diverse genus with cercial significance
for agar production. Present work was carried out under controlled indoor conditions, to determine the optimal
salinity requirement for G. corticata. Raft culture in plastic crates using different salinity levels was employed.
The vegetative thalli of G. corticata were collected from the intertidal region during low tide from Thikkodi,
Kozhikode. Ten polypropylene ropes were tied parallel at 10 cm intervals on the plastic rafts and introduced
into the rectangular plastic crates of 60 x 40 x 30 cm3. About 100 g of G. corticata were used as seeding
material on rafts and are introduced to different salinities viz 5, 10, 15, 20, 25, 30 and 35 ppt in triplicates
for 30 days. Thalli growth was recorded the fastest in crates containing full strength seawater (35 ppt) and
successively slower in crates with lower salinities. After 30 days of culture period, mean weight of seaweed
harvested from each treatment was 108±8.5 g (20 ppt), 155±12.5 g (25 ppt), 156±10.2 g (30 ppt) and
160±12.8g (35 ppt). The results indicated that G. corticata can be cultured using raft method at salinity above
25 ppt. The reduction in the level of nutrients like ammonia, silicate and phosphate in the culture system
indicated that the nutrients were utilized by G. corticata for their growth. Future studies with G. corticata in
field trials in integrated multi-trophic aquaculture (IMTA) would prove its feasibility in nutrient load reduction
in the estuarine as well as coastal waters.
 
Publisher ICAR-Central Marine Fisheries Research Institute
 
Date 2022
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/16048/1/MFIS%20251_Imelda%20Joseph_2022.pdf
Shilta, M T and Abhijith, Ramya and Vinod, K and Asokan, P K and Imelda, Joseph (2022) Pilot study on the growth performance of red seaweed, Gracilaria corticata in different salinities. Marine Fisheries Information Service, Technical and Extension Series (251). pp. 15-18. ISSN 0254-380X