نقش زيوپلانكتونها در مناسبات تغذيه اي بچه ماهيان خاوياري گونه قره برون در استخرهاي پرورش مركز تكثير و پرورضش ماهي شهيد رجايي ساري (1378)

The study on the nutrition of the juvenile sturgeon (Acipenser Persicus) in fish ponds of Shahid Rajaieʹs centre (1999)

This project was done in pisciculture of Shahid Rajaie centre in Sari. At first 3 pools with equal area were selected randomly. During 6 weeks from 30.3.1999 to 31.5.1999 were sampled with fishes, zooplanktons and zoobenthoses. After collecting and classifying of data, were identified cladocerans belonging to 2 families, 6 genera and 9 species. On the other hand two genera of copepods were identifeid and Ostracodans were observed abundantly in ponds. One genus belonging to 1 family of benthoses were identified. The study on the Stomach content of 560 juvenile sturgeons with mean length and weight, 90 mm and 3200 mg respectivly. Were showed that cladoceran and chironomidae were staple diet and copepoda and their nauplie were secondary diet. To analyses data of juvenile sturgeon nutrition, and to survey on the significance differences between pools, soft ware windows 98, workshit / pools were used.