Artificial propagation and larval rearing of the grouper (Epinephelus coioides Ham. 1822) -Preliminary investigation on hormon propagation in netcage (in Mahshar estuary)

For the first time in Iran artificial propagation and larval rearing of one native species marine fish, Grouper (Epinephelus coioides) orange spont was done during - 1397. For estabishing marine fish farm site selection in Ghazaleh estuary in Mahshar was done. Estabishing netcages and wild spawner were caught and transfered there. Also marine hatchery farm containing spawning tank, trough, rearing larvae tank and live food unit were built. Because Grouper is hermaphrodite protogenos, it was difficult to provide enough male wild spawner naturally, so implantation technique was used for sex reversal. Successfully in supplying needed male spawner for propagation. In spawning season (April May) at 21-25 °C temperature two methods was used. 1. Induce spawning by injection Hormone HCG (1395) 2. Induce spawning without Hormone using by concrete spawning tank in natural condition (1397) all stages of propagation containing (ovation, fertilization, larval production and final food larvae and fingerling production, sex reversal) was successful. In sex reversal the best method was 17α metyltestostorn capsule Hormone implantation abdomen s fish whose suitable size was 5-6 kg .In artificial propagation, at 24-hour interval two Injection with HCG Hormone by 750 IU per kg fish was done. Spawner was started 24-hour after 2nd injection in large amount with bad quality and poor fertilization rate. In semi artificial spawning (without hormone) in spawning tank was gradually and from April at 2-25°C temperature to May 28-30oc temperature. Suitable water temperature for growth of larvae was (23-25°C) and survival rate was (% 29-1/2). The larvae were fed with small size rotifer (80-150 µ) on first week, with 10 rotifer /ml, and large size of rotifer (150-280 µ) on 20th day, artemia saline on (20-25)the day and after 30th day with minced meat. Finally fingerling reached to 9 gr in 80th day

Study on rearing movine carps in the ponds of brackish water and freshwater

In this study, mono culture of Cyprinus carpio in fresh water and brackish water with 3500 specimens per hectare with 3 replication each carriedout from midel April to end the October 2010 and mide april to end the October 2011 recptively. Juline fish with 40 gr weight takeup from the sade voshmgir and after prepara tion of rearing ponds were introduced to pond according to appropriate and caluclate stocking density. Juline were fed by concentracted food(GFC). Feeding calculation based on percentage of body weight varied from 5 to 10 % of body weight. In fresh water Average weight and lenghth were in the stage time stocking 40 gr 14.68 cm and at the end of cultuivation period were 704.26 gr and 37.04 cm respectively. Inorder to comparecultivation of Cyprinus carpio in freshwater with breackish water another stocking 350 specimens per hactar with 3 replications also tookplace in this study. Junlin fish with average weight of 40gr and average length of 14.12cm were introduced to the ponds. At the end of rearing period average final weight was 700.26 with average length of 38.86cm.mean daily growth in fresh water treatment was 3.39. in brackish water replication the average daily . average condition factor in fresh water was 2.41. The average value CF in breackishwater was 1.39. in this research was survival rate in the fresh water and breackish water were more 77%

Study on rearing movine carps in The ponds of brackish water and freshwater

In this study, mono culture of Cyprinus carpio in fresh water and brackish water with 3500 specimens per hectare with 3 replication each carriedout from midel April to end the October 2010 and mide april to end the October 2011 recptively. Juline fish with 40 gr weight takeup from the sade voshmgir and after prepara tion of rearing ponds were introduced to pond according to appropriate and caluclate stocking density. Juline were fed by concentracted food(GFC). Feeding calculation based on percentage of body weight varied from 5 to 10 % of body weight. In fresh water Average weight and lenghth were in the stage time stocking 40 gr 14.68 cm and at the end of cultuivation period were 704.26 gr and 37.04 cm respectively. Inorder to comparecultivation of Cyprinus carpio in freshwater with breackish water another stocking 350 specimens per hactar with 3 replications also tookplace in this study. Junlin fish with average weight of 40gr and average length of 14.12cm were introduced to the ponds. At the end of rearing period average final weight was 700.26 with average length of 38.86cm.mean daily growth in fresh water treatment was 3.39. in brackish water replication the average daily . average condition factor in fresh water was 2.41. The average value CF in breackishwater was 1.39. in this research was survival rate in the fresh water and breackish water were more 77%.Iranian Fisheries Science Research InstitutePublishe