Edis KORU, Sema CİRİK, GAMZE TURAN, İLKNUR AK, ASLI BAŞARAN

Gracilaria verrucosa (Hudson) Papenfuss kültürüne farklı ışık yoğunluklarının etkisi

Bu çalışmada, kırmızı alglerden (Rhodophyta) Gracilaria verrucosa (Hudson) Papenfuss türünün farklı ışık yoğunluklarında 20 litrelik sürekli su akışının sağlandığı tanklarda yetiştiriciliği araştırılmıştır. Yapılan çalışmada, denizden pompalanan su tank sistemlerine getirilerek sürekli akış sağlamıştır. Suyun debisi 1.44 m3. gün -1 olarak ayarlanmıştır. Tanklarda su yüzeyine 12 saat aydınlık, 12 saat karanlık fotoperiyot uygulanmıştır. Aydınlatma esnasında, 1000 ve 3000 lux olmak üzere iki farklı ışık şiddeti uygulanmıştır. Üç aylık deneme süresince (Kasım 2002 – Ocak 2003) tanklardaki su sıcaklığı 8.7-20oC arasında değişmiştir. G. verrucosa biyoması ve su parametreleri düzenli olarak ölçülmüştür. Gelişmeleri düzenli olarak incelenen alglerde algin büyümesine ışık yoğunluğu ve sıcaklığın etki ettiği belirlenirken, uygulanan 1000 ve 3000 lux gibi iki farklı ışık şiddetinin algin büyümesinin 3000 lux ışık şiddetinde daha fazla olduğu ancak her iki ışık şiddeti arasında istatistiksel bir farklılık tespit edilmemiştir.

Anahtar Kelimeler:

kültür teknikleri, ışık yoğunluğu, su kalitesi, algler, su sıcaklığı

The effects of different light intencities on the Gracilaria verrucosa (Hudson) Papenfuss culture

In this study, a culture of a red macro algae Gracilaria verrucosa (Hudson) Papenfuss in the continuous water flow indoor 20 lt tank systems with different light intensities was examined. During the study, continuous water exchange was supplied by a water pump from the sea into the tanks. The water flow was recorded as 1. 44 m3.day-1. Daily 12 hrs illumination and 12 hrs dark photo-period cycle was applied above the water surface area in the tanks. During the illumination period, 1000 and 3000 lux light intensities were supplied. During the 3-month study period between November 2002 and January 2003, the water temperature was ranged between 8.7 and 20 0C. During the experiement G. verrucosa biomass and water quality parameters were measured and recorded periodically. From the result of study, it was concluded that the light intensity and temperature affected growth of algae, and there was no significant differences recorded between the algal growth measured grown at 1000 lux and 3000 lux light intensities, even algal growth was measured higher at 3000 lux light intensity.

Keywords:

culture techniques, light intensity, water quality, algae, water temperature,

PDF

___

Ak, İ., and S. Cirik. 2004. Distribution of Gracilaria verrucosa (Hudson) Papenfuss (Rhodophyta) in Izmir Bay (Eastern Aegean Sea). Pakistan Journal of Biological Sciences 7(11):2022-2023.
Bird,K.T., and P.H., Benson. 1987. Seaweed cultivation for renewable resources. Elsevier. USA: 170-175.
Cirik, Ş. 1979. Analyse Bibliographique des Travaux sur les Phanerogrames et les Algues Marines Bentiques des cötes de Turquie (1843-1978) Rev. Bio. Eco. Medit, 4:93-100.
Cirik,Ş., and S. Cirik. 1999. Aquatic Plants (ecology, biology and culture techniques of marine plants) Ege University Fisheries Faculty Periodicals. Bornova 58:135-155 (in Turkish)
Cirik,S., and Ş. Gökpınar. 1993. Plankton and it’s culture (in Turkish). Ege University Fisheries Faculty Periodicals. Bornova 38:217.
Chirapart, A., and M. Ohno. 1993. Growth in tank culture of species of Gracilaria from the Southeast Asian waters. Botanica Marina, 36: 9 -13
Critchley, A.T. 1991. Gracilaria (Rhodophyta, Gracilariales): An Economically important agarophyte. Kochi University pres. 89-107
Edding, M., C. Leon, and R. Ambler. 1987. Growth of Gracilaria sp. in the laboratory. Hydrobiologia 151/152, 375-37
Egemen, Ö., and U. Sunlu. 1999. Water quality (in Turkish). Ege University Fisheries Faculty Periodicals. Bornova 14:20-25.
Hansen, J. 1984. Strain selection and physiology in the development of Gracilaria mariculture, Hydrobiologia 116/117, 89-94.
Jones, W.E. 1959. The growth and futuring of Gracilaria verrucosa (Hudson) Papenfuss. J. Mar.Biol.Ass.U.K.,38:47-56.
Lapointe,B.E. 1985. Strategies for pulsed nutrient supply to Gracilaria cultures in the Florida Keys: Interactions between concentration and frequency of nutrient pulses. J.Exp.Mar.Ecol.,93,211-222.
Lignell,A., P.Ekman, and M. Pedersen. 1987. Cultivation technique for marine seaweeds allowing controlled and optimized conditions in the laboratory and on a pilotscale. Botanica Marina,30,417-424.
Mollion, J. 1984. Seaweed cultivation for phycocolloid in the Mediterranean. Hydrobiologia 116/117, 288-291
Özdamar, K. 1997. Statistical data analysis by PC programs. I. Anadolu University Periodicals. Eskişehir.1001:125-130 (in Turkish)
Santelices,B., and M. Doty. 1989. A review of Gracilaria farming. Aquaculture. 78: 68-133.