Vol. 6 Issue 1
M.S. Ghamrawy
A total of 12 species of Penaeid shrimp, belonging to five genera, have been identified from the Saudi Arabian Red Sea and the Arabian Gulf. Keys and diagnostic features for each species are presented. Information on geographical distribution and commercial value is brought together for each species.
Mikky A. Amoudi
A total of 33 chickens was used; each chick was inoculated with approximately 12,000 to 15,000 sporulated Eimeria tenella oocysts. Chickens were used in nine groups, four treated with thiotepa, and four treated with 2.5 dichloro-2, 4 dinitro benzene sulfonanilide, while the remaining group served as a control. Groups, two, four, six and eight were given doses of thiotepa at levels of 1.54 mg/bird, 3.08 mg/bird, 6.16 mg/bird and 9.24 while groups three, five, seven and nine were given doses of 2, 5 dichloro-2, 4 dinitro- benzene sulfonanilide at levels of 1.54 mg/bird, 3.08 mg/bird, 6.16 mg/bird and 9.24 mg/bird. Both groups treated with both drugs showed a significant decreases in oocyst production with increase of drug concentration.
K.Z. El Deeb and E.H. El Ebiary
Concentrations of total aromatic hydrocarbons (TAHC) were determined in two seabream fishes from the Family Sparidae, longspine seabream, Argyrops spinifer (Kofar) and Mylio bifasciatus (Faskar) from the eastern and southeastern coats of Qatar. Levels of total hydrocarbons in the muscle and liver tissues of Argyrops sp. were lower than those in Mylio sp. Variations in TAHC with size were very slight in Argyrops sp. while Mylio sp. showed significant variations in both muscle and liver tissues.
The hydrocarbons contained, in the two fishes displayed, high aromatic concentrations correlated with increasing fat content. Mean concentrations of total aromatic hydrocarbons in the muscle and liver tissues of Argyrops sp. were 24.5 and 23.7 µg/g while in Mylio sp. they were 53.4 and 41.1 µg/g wet weight chrysene equivalents respectively.
Shokry Ibrahim Saad and Wafaa Kamal Taia
Pollen grains of twenty seven species of Egyptian Astragalus were studied, using LM, SEM and TEM. Pollen morphology of Astragalus tends to be rather uniform. The majority of species have tricolporate grains of medium size, with a micro reticulate exine. Evolutionary trends within the genus have been observed. One trend is from subprolate to prolate and another shows increase in pollen size. The present results show also a correlation between pollen morphology and habitat. Xerophytic species usually have a thick tectum with narrow lumina. In addition to this, the pores are covered by thick apertural membranes in the form of bridges or plugs. On the other hand, mesophytic species have a thinner tectum and thin pore membranes. By plotting P/E again P, four pollen types can be distinguished. These types can be related to established taxonomic groupings.