بعض القياسات الحياتية لسمكتي الحمري Carasobarbus luteus و الخشني abu Planiliza في نهر دجلة ضمن منطقة تكريت صلاح الدين العراق

الملخص EN

Comparative study has been carried out for some biological measurements (lengthweight relationship, condition factor, length-length relationship and food item types) for two freshwater fishes, Himeri Carasobarbus luteus and Kishni Planiliza abu in Tigris River within Tikrit region during the period from December 2017 to May 2018.

Sixtythree C.

luteus specimens were collected with total lengths ranged from 15.7-33.0 cm and seventy-two C.

aurata with total lengths ranged from 13.7-23.5 cm.

The growth pattern showed positive tendency, the weight and growth increased more than cubic length with (b) values was 3.153 for C.

luteus and 3.129 for P.

abu , and the standard growth was equal to 3.084 for C.

aurata males.

Condition factor for C.

luteus was (1.379) higher than P.

abu (1.215), While in C.

luteus female showed relatively equal value to male, in addition in P.

abu female was higher than male.

Fluctuation was found in condition factor with length increasing in P.

abu.

The food components included seven types in C.

luteus included (plant particle's and seeds, organic matter, diatoms, crustaceans, insect parts, grains of sand and clay and algae) and four types in P.

abu (plant partials and seeds, organic matter, grains of sand and clay, algae).

Different plants parts and their seeds were the main food contents flowed by organic materials, and percentage of food components varied according to fish species.

The research cover, the ratios of twelve-morphometric measurements to total length, and eight morphometric measurements to head length and their linear regression equations.

The length-length relationship between total length and others measurements were highly correlated.