Süleyman Akhan

Acute effects of copper and lead on some blood parameters on Coruh trout ( Salmo coruhensis )

The present study was to evaluate whether short-term exposures (3 h) to high concentrations of heavy metals may induce blood cells in Coruh trout ( Salmo coruhensis ). It was investigated that copper and lead have effects on haematocrit, serum glutamic oxaloacetic transaminase (SGOT), serum glutamic and pyruvic transaminase (SGPT), total protein, blood cell numbers and erythrocyte morphology of S. coruhensi s exposed to two copper and lead concentrations for 3 h. Copper and lead concentrations tested in the experiments were 5 and 10 mg Cu/L; 5 and 10 mg Pb/L, respectively. Blood was sampled immediately after the end of exposures and then 24, 48 and 72 h later post exposures. Treatments were not inducing micronuclei in the erythrocyte nuclei. Key words : Copper, lead, heavy metal, Salmo coruhensis, micronuclei, blood cells.

Ağ-Kafeslerde Kışlatılan Gökkuşağı Alabalığında (Oncorhynchus mykiss) Uzun Süreli Açlığın Bazı Verim Özellikleri İle Vücut Kompozisyonu Üzerine Etkisi

Arastirmada gokkusagi alabaliklari, Kuzgun Baraj Golu’nde (Ilica-Erzurum) faaliyet gosteren ozel bir ag-kafes isletmesinde dort ay sureyle (Aralik 2005 ile Nisan 2006 aylari arasinda) yemlenmeden ac tutulmustur. Baslangicta ve dort aylik sure sonunda numuneler alinarak uzun sureli acligin baligin bazi verim ozellikleri ve vucut kompozisyonu uzerine etkisi arastirilmistir. Arastirma sonuclari baslangicta ortalama 171,73±11,23 g agirliga sahip baliklarin 4 ay sonunda ortalama 126,58±15,17 g agirliga geriledigi, yemlemeye baslanildiktan sonraki 2. ayda toparlayarak 191,25±33,49 g agirliga ulastigi gostermistir. Benzerce kondisyon faktoru de 4 ay sonunda 1,63±0,03’ ten 0,96±0,04’e dusmus, tekrar yemlemenin baslatildigi aydan 2 ay sonra 1,57±0,09’a yukselmistir. Ancak yemleme yapilmayan 4 aylik sure sonunda karkas verimi %82,37±0,7’den %85,14±0,32’e yukselmis, ic organ orani ise % 13,27±0,56’dan %9,08±0,17’e dusmustur. Uzun sure acligin ham protein orani, ham kul orani uzerine istatistiksel olarak bir etkisi gorulmezken, baslangicta %13,19±1,07 olan ham yag orani ac gecen 4 ay sonunda % 9,44±0,56’ ya dusmustur sonraki ayda yag orani toparlanarak tekrar % 13,9 yukselmistir.

EFFECT OF LONG TERM STARVATION ON SOME PRODUCTIVITY TRAITS AND BODY COMPOSITION OF TURKISH STRAIN BROWN TROUT (SALMO TRUTTA FARIO) WINTERED IN FLOATING NET-CAGES

In this research, brown trout had been wintered for 4 months (Between December 2005 and April 2006) in net-cages in Kuzgun Dam Lake (ErzurumTurkey) without any feeding. Specimens were collected before and after long term fasting in order to investigate effect of starvations on some productivity traits and body composition of fish. Fish were fed daily by commercial trout feed after May 2006. At each sampling time, 15 fish were sampled from square wooden net cages (5*5*8 m) for analysis. Research results showed that 66.10±4.42 g initial mean weight was decreased to 44.99±4.40 g after five months and then fish were recovered and reached to 148.11±13.00 g main weight. Similarly, condition factor had been decreased from 1.19±0.028 to 0.79±0.02 after 5 months and then it was increased as 1.54±0.053 fallowing two months. After wintering, carcass yield was increased from 82.86±0.7% to 84.16±1.40%. Long term starvation did not affect raw protein rate statistically before and after wintering. However, raw fat rate was decreased from 2.67±0.17% to 1.44±0.17% after long term starvation, and then raw fat rate increased up to 3.70 ±0.25% in fallowing months.