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The aim of the current research is to study the effects of economic integration within the Cooperation Council for the Arab States of the Gulf (CCASG) and its influence on the trade within the region as well as with other countries. The trade development of member countries of the Cooperation Council for the Arab States of the Gulf was analysed with the help of gravitation model in the context of the existing agreements of the trading preferences on the Middle East and North Africa. It was proved that establishment of CCASG made extremely positive influence on the development of the intraregional trade. It was also discovered that economic integration of the CCASG members showed rather the effect of trade creation than the effect of trade diversion. Signing of free trading agreement between the CCASG and the EU and between the CCASG and the USA had also positive results.
Recent parasitological examinations of the marine perciform fish (tigerteeth croaker) Otolithes ruber (Bloch et Schneider) (Sciaenidae) from off Iran yielded one new and one previously known nematode species: Dichelyne (Dichelyne) spinigerus sp. nov. (Cucullanidae) from the host’s intestine in the Persian Gulf and Philometra otolithi Moravec et Manoharan, 2013 (Philometridae) from the ovary in the Persian Gulf and the Sea of Oman. The new species D. spinigerus is mainly characterized by the tail tip of both sexes terminating in two shaply pointed spikes (one dorsal and one ventral) and bearing a pair of minute lateral cuticular spines at its base, situation of both deirids and the excretory pore well posterior to the level of the posterior end of oesophagus, absence of a precloacal sucker and the presence of one or two intestinal caeca. The male and small mature females of the gonad-infecting species P. otolithi are described for the first time, based on light and scanning electron microscopical studies. The male of P. otolithi is most similar to that of P. johnii Moravec et Ali, 2013, but differs from it by the structure of the cephalic end and the number of caudal papillae; both species also differ from each other by the presence of transverse lamellae in the buccal cavity of gravid and subgravid females of P. otolithi, which are missing in those of P. johnii.
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