Comparison of the growth performance and mortality in Abant Trout (Salmo trutta abanticus Tortonese, 1954) and rainbow trout (Oncorhynchus mykiss Walbaum, 1792) under farming conditions [Çiftlik Koşullarinda Abant Alabaligi (Salmo trutta abanticus Tortonese, 1954) İle Gökkuşagi Alabaligi (Oncorhynchus mykiss Walbaum, 1792)'nin Gelişim Performansi ve Ölüm Oranlarinin Karşilaştirilmasi]

This experiment was conducted between 15th February 2000 (day 1) and 31st January 2001 (day 350) at the DSI-Gölköy Fish Production Station, Bolu (Turkey). Abant trout larvae obtained from eggs of wild Abant trout broodstocks in Lake Abant and rainbow trout larvae obtained from eggs of the hatchery broodstocks in Gölköy Fish Production Station were used. Trials I and II involved eight groups (four Abant and rainbow trout experimental groups, and four Abant and rainbow trout parallel groups). A total of 1784 larvae was used in both the trials. At the end of the experiment, although the mean wet weight of Abant trout was found to be around 5 g, the maximum increase in weight was found in rainbow trout (between 116.202 and 173.315 g in trials I and II). Final mean condition factors (CF) differed between the Abant and the rainbow trout groups (P < 0.001). The specific growth rate (SGR) exhibited significant differences between trials I and II for the Abant and rainbow trout groups (P < 0.01) (P < 0.05). It is concluded that the desired level of growth performance of Abant trout was not obtained in tank conditions. In contrast, the growth and survival rate of rainbow trout were clearly better than those of Abant trout

An overview of molluscan shellfish industry in Turkey

Turkey is surrounded by the Black Sea in the North, by the Aegean Sea in the West, and by the Mediterranean in the South. The length of coastline exceeds 8,000 km. Turkey produces about 625,000 tons of seafood annually. The production of molluscan shellfish has reached 25,000 to 30,000 tons annually. Shellfish, especially bivalvia is not a traditional food in Turkey. Only mussel, Mytilus galloprovincialis is consumed to any significant amount in large cities of western Turkey such as Izmir and Istanbul. Of the 55 million population in Turkey, it is estimated that no more than 1 % consume mussels regularly. Until recently, there was no interest in bivalvia in the domestic market. © 1991 by CRC Press, Inc

Temperature Control of a Batch Polymerization Reactor

In this work, DMC (Dynamic Matrix Control) of a batch solution polymerization reactor has been investigated experimentally and by simulation to achieve a specific constant number average chain length and conversion in a minimum time. The process variables are reaction temperature and initiator initiation concentration. The performance of the DMC controller was compared with that of the IMC (Internal Model Control) controller. It was seen that DMC and IMC controllers yielded a good performance in maintaining the reactor temperature at its set point at the isothermal conditions