بررسي روند رشد صدفچه مرواريد ساز زني (Pteria penguin) با ريزجلبك هاي ( Pavlova lutheri) و (Chaetoceros muelleri)

Investigation of the pearl oyster spat ( Pteria penguin) growth process with microalgae (Pavlova lutheri) and (Chaetoceros muelleri)

روند رشد صدفچه مرواريد ساز زني (Pteria penguin) در شرايط آزمايشگاه با استفاده از ريزجلبك­ هاي (Pavlova lutheri) و (Chaetoceros muelleri) كشت داده شده با محيط كشت گيلارد f/2 به ­مدت 30 روز مورد مطالعه قرار گرفت. در اين مطالعه 4 تيمار آزمايشي و يك تيمار شاهد به­ صورت مجزا و تركيبي از ريز جلبك­هاي پاولوا و كتوسروس هركدام با سه تكرار با تراكم 10 عدد صدفچه مورد بررسي قرار گرفتند. نتايج نشان داد بين طول پشتي شكمي صدفچه ­ها در تيمارهاي مختلف اختلاف معني­دار وجود ندارد (0/05P) و تيمار 1 بهترين وضعيت را نشان داد، هرچند اين تيمار با تيمار 2 اختلاف معني ­دار نداشتند. از ديدگاه ضخامت صدفچه ها اختلاف معني ­داري بين تيمارها مشاهده نگرديد (0/05P) و تيمار شماره 1 بيش­ترين بقاء را به­ خود اختصاص داده، هرچند بين اين تيمار و تيمار شماره 2 اختلاف معني­ داري مشاهده نگرديد. در مجموع تيمار شماره 1 بهترين تيمار بوده ولي با توجه به نداشتن اختلاف معني­ دار با تيمار شماره 2، مي­توان تيمار مذكور را نيز مناسب رشد صدفچه مرواريد ساز زني دانست.

The growth process of pearl oyster spat ( Pteria penguin) was studied under laboratory conditions using Pavlova lutheri and Chaetoceros muelleri cultured with Gillard's F/2 media for 30 days. In this study, four experimental treatments and one control treatment separately and a combination of Pavlova lutheri and Chaetoceros muelleri each with three replications with 10 spat densities were investigated. Results showed that there was no significant difference between treatments in terms of dorso ventral length (P> 0.05), but treatment 5 caused almost the whole total length. Regarding the height of the heel, there was a significant difference between the treatments observed (P <0.05) and treatment 1 with the best condition, although there was no significant difference between treatment with treatment 2. From the viewpoint of thickness, there was no significant difference between treatments (P> 0.05). But there was a significant difference between treatments (P <0.05) and treatment 1 produced the highest weight. Survival percent also showed a significant difference in different treatments (P <0.05), and the treatment group 1 had the highest survival, although there was no significant difference between treatment and treatment number 2. As a general conclusion, treatment number 1 was the best treatment, but considering the absence of significant difference with treatment number 2, this treatment can be suitable for the growth of Pteria penguin.