Immunostimulant Effects of Geophyte Plant Extract on Non-specific Defence Mechanisms of Rainbow Trout (Oncorhynchus mykiss)
Open Access
- 27 April 2018
- journal article
- Published by Journal of Limnology and Freshwater Fisheries Research in Journal of Limnology and Freshwater Fisheries Research
- Vol. 4 (1), 36-41
- https://doi.org/10.17216/limnofish.376404
Abstract
Tr en Bu çalışmada amacımız, gökkuşağı alabalığının spesifik olmayan savunma mekanizması üzerine geofit bitki ektraktının immunostimulant etkisinin belirlenmesidir. Bu amaçla geofit bir bitki olan M. comosum Muğla bölgesinden toplandı ve etanolde ekstrakte edildi. Daha sonra farklı dozlarında (0,5 mg/balık ve 2,0 mg/balık) balıklara intraperitonal olarak uygulandı. Balıklar ortalama 140 g ağırlığa sahipti. Deneme süresince uygulamayı takiben 1, 7, 14, 21, 28. günlerde herbir gruptaki balıktan kan ve serum örnekleri alınarak farklı parametreler (hematokrit yüzdesi, nitroblue tetrazolium (NBT) pozitif nötrofil sayısı, toplam lökosit sayısı, beyaz kan hücrelerinin yüzdesi ve serum lizozim aktivitesi) açısından incelendi. Bu çalışmanın sonucunda NBT pozitif nötrofillerin sayısı, monosit ve nötrofil yüzdeleri ve toplam lökosit sayısı 0,5 mg/balık dozunda injeksiyon yapılan grupta kontrol grubuna kıyasla artış gösterdiği (PM. comosum’un kullanılması önerilebilir. Ancak, bitki ekstraktının oral yolla yeme ilave edilerek balıklara uygulanması ile immunostimulant etkisinin belirlenmesi için gelecekte yeni çalışmalara ihtiyaç duyulmaktadır. The aim of this study was to determine the immunostimulant effects of geophyte plant extract on non-specific defence mechanisms of rainbow trout (Oncorhynchus mykiss). For this purpose, Muscari comosum was collected in Muğla region and extracted in ethanol. Then, The plant extract applied into fish by intraperitonal injection in two different concentrations (0.5mg/ fish and 2.0 mg/fish). The average fish weight was 140 g. Following the injection on the 1st, 7th, 14th, 21st, 28th days the blood and serum samples were collected from fish in each group and examined for various parameters including percentage of hematocrit, the counts of nitroblue tetrazolium (NBT) positive neutrophils, total leukocyte counts, percentage of white blood cells and serum lysozyme activity. The results indicated that the counts of NBT (+) neutrophils, percentage of monocyte and neutophil and total leukocyte counts increased in the group with injected 0.5mg plant extract /fish compared to control group (PM. comosum can be suggested to use to enhance non-specific immune system for rainbow trout aquaculture. However, immunostimulant effects of oral administration of this plant extract in rainbow trout are needed to be determine in future studies.Keywords
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