Optimal salinity and temperature for early developmental stages of Penaeus merguiensis De Man

Zacharia, Sherly and Kakati, V S (2004) Optimal salinity and temperature for early developmental stages of Penaeus merguiensis De Man. Aquaculture, 232 (1-4). pp. 373-382.


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The combined effects of temperature and salinity on the hatching success, survival and development of the larval stages of Penaeus merguiensis were investigated in a 4×2 factorial designed experiment employing two temperatures (29±1 and 33±0.5 °C) and four salinities (25, 30, 35 and 40 ppt). Best percentage of hatch was obtained at 33 °C and 35 ppt (87%) followed by 29 °C and 35 ppt (82%). Similarly during naupliar stages, high survival rate was obtained at 33 °C and 35 ppt (89%). Metamorphosis cycle during the protozoeal stages (protozoea 1 to postlarva 1) was extended and survival rate decreased at 25 ppt. Development to PL1 was faster at 33 °C (7–8 days) as compared to 29 °C (8–10 days) regardless of the salinity levels. Maximum survival during the protozoeal stages was at 35 ppt followed by 48% at 33 °C and 45% at 29 °C. Results showed that salinity exerted a greater influence than temperature on the survival and development of larvae. Based on the results, the best temperature–salinity combination for larval survival and metamorphosis of P. merguiensis is 33 °C and 35 ppt. A salinity range of 30–35 ppt is ideal for larval development.

Item Type: Article
Uncontrolled Keywords: salinity; temperature; Penaeus merguiensis; larvae; survival; development
Subjects: Crustacean Fisheries
Eggs and Larvae
Divisions: CMFRI-Cochin > Marine Capture > Crustacean Fisheries
Depositing User: Arun Surendran
Date Deposited: 28 Oct 2010 10:06
Last Modified: 09 Sep 2015 15:34
URI: http://eprints.cmfri.org.in/id/eprint/5769

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