LEVENT YURGA, Tufan KORAY, BAŞARAN Aslı KAYMAKÇI, Özdemir EGEMEN

Deniz yetiştiriciliği yapılan bir bölgede mikroplankton tür çeşitliliği ve TRIX indekslerinde oluşan değişimler

Akuakültür ve özellikle kafes balıkçılığı Türkiye'de hızla gelişen bir sektördür. Ancak, balık çiftliklerinin neden olabilecekleri ortamsal hasar ve ekolojik tahrip tam olarak bilinmemekte ve standardize yöntemlerle izlenmemektedir. Yoğun akuakültürel aktiviteler kıyısal bazı körfezlerde kirlenme ile çok belirgin bir paralellik sergilemekte ve turizmi olumsuz yönde etkilemektedirler. Bu çalışmada, denizdeki besin zincirinin ilk kademesi, mikroplanktonik tür çeşitliliği ve fiziko-kimyasal trafik indeks TRIX bir kafes balıkçılığı bölgesinde ortamsal hasan tanımlamak için karşılaştırıldı. TRIX indeksinin kafesler çevresindeki ototrofik aktivitelerin değerlendirilmesi için çok verimli bir indeks olduğu ancak heterotrofi ve miksotrofi için duyarlı olmadığı ve PRIMER programındaki iyi bilinen biotikve ekolojik indekslerce desteklenmesi gerektiği saptandı.

Anahtar Kelimeler:

tür çeşitliliği, besin zinciri, balık çiftlikleri, Türkiye, ekosistem, fitoplankton, türler

The variations in microplanktonic species diversity and TRIX indexes in a sea cage fish farming locality

Aquaculture and especially cage fish farming is a very fast developing sector Türkiye. However, the ecological destruction and environmental hazard which may be caused by fish farms is not known exactly and is not monitored with standardized methods. Intensive aquacultural activities lias exhibited very clear parallelism with pollution in some neritic bays and has negatively affected tourism. In this study, the first level of the marine food chain, the microplanktonic species diversity, and a physico-chemical trophic index TRIX were compared for identifying the environmental hazard of a sea cage fish farming area. It was determined that TRIX was a very effective index for evaluating autotrophic activities around the cages, however, was not sensitive for heterotrophy or mixotrophy and should be maintained by biotic and ecological indexes in which was well known program PRIMER.

Keywords:

species diversity, food chains, fish farms, Turkey, ecosystems, phytoplankton, species,

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