Impact of cold stress on haematolog1cal and biochemical parameters of Yemeni toad (Bufo tihamicus)‎

الملخص EN

Changes of some haematoJogicaJ and biochemical parameters of 30 ¥e؛neni toad (Bufo tihamicus) were studied after one and two hours of eold stress.

The haematoiogieal parameters showed an inerease after one and two hours in compare to eontrol.

The RBCs count was increased after one and two hours as (1.44 and 1.65) X 106 cells/mm3, haemoglobin amount (Hb) as (8.6 and 9.52) g/dl, haematocrit value (Hct) as (24.6 and 27.88 %), mean cell volume (MCV) as (171.08 and 168.32 um3) and mean corpuscular haemoglobin concentration (MCHC) as (34.99 and 34.53 g/dl).

The values of serum total protein were significantly (p<0.05) increased, as (5.4 and 6.8 g/dl), glucose as (76 and 74 mg/di), cholesterol as (178 and 149 mg/dl) and AST as (20 and 38 U/L) after one and two hour cold stress respectively, while the values of plasma ALT (29 M/1) increased significantly only after two hour (p<0.05).

In conclu- sion, the changes in some haematological and biochemical parameters of Yemeni toads W'ere response to cold water stress as adaption to their environment fluctua- tion.

Keywords: cold stress, Bufo tihamicus, haematology, biochemist^}'