Search

Species of genus Thryssa in Iraqi marine water were studied during the period from March to November 2010. Three species were recorded T. whiteheadi Wongratana, 1983, T. mystax (Schneider, 1801) and T. vitrirostris (Gilchrist and Thompson, 1908). The first type (T. whiteheadi) is characterized that the tip of the snout lies above the level of eye center, the upper tip of maxillary bone projects just a little beyond the operculum, and the number of branching rays of the anal fin varies between 40-43. While the tip of the snout in the other two types (T. mystax and T. vitrirostris) lies at level of eye center. These two latter types are different in the length of the upper maxillary bone, which reaches to the base of first pectoral fin ray in the former while exceeds a little beyond the base of the first pectoral fin ray in the second; the number of branching rays in the anal fin varies from 32-33 in the former and from 37-38 in the latter. Lower gill raker of the first arch ranged from 18 to 19 in T. whiteheadi, 15 to 16 in T. mystax and 20 to 21 in T. vitrirostris. [ABSTRACT FROM AUTHOR]

The concentrations of the heavy metals (Cd, Co, Cu, Fe, Mn, Ni), were studied in four organs (liver, Gills, ovaries and muscles) in the body of Liza subviridis, which belong to the family Mugilidae for a period of seven months of the year. The concentrations of heavy metals were measured by Flame Atomic Absorption Spectrophotometer, and the fish average weight and length were (136.3) g, (231) mm respectively. The results showed that the highest concentrations value of Nickel in Gills was 109.62 μg/g in December. The element Iron in the liver was 59.87 μg / g in January, and the element manganese in the ovaries was 15.18 μg / g in March, while the minimum values of the element concentrations, manganese, cobalt and cadmium in the ovaries during the remaining months of the study were below the level of sensing device. The study showed that the order of accumulation in organs was as follows: liver > Gills > muscles > ovaries. In general the concentrations of elements during December, January, May and June, were less than March, February and April. [ABSTRACT FROM AUTHOR]