| 摘要 |
1534050 Prawn culture CENTRE NATIONAL POUR L'EXPLOITATION DES OCEANS and AGENCE NATIONALE DE VALORISATION DE LA RECHERCHE (ANVAR) 3 June 1976 [26 April 1976] 22975/76 Heading A1A Prawns are bred by putting immature prawns in tanks containing sand and water at a temperature of from 14‹C to 18‹C, lighting the tanks daily for between 8 and 13 hours, progressively increasing the temperature and the daily period of lighting over a period of three months and then maintaining the temperature and lighting conditions for the entire duration of oviposition. The maintained temperature is in the range 20‹C to 26‹C and the lighting period between 13¢ and 16 hours. The prawns are fed daily with steroid-rich substances such as mussels. The lighting has an intensity of from 500 to 1500 lux on the water surface; the water salinity lies between 34 and 36 grams per litre and the pH is between 8 and 8.5. |
