Zooplankton in Iraqi marine coastal and estuarine brackish water and their role as hosts of some parasites

العناوين الأخرى

الهائمات الحيوانية في مياه السواحل البحرية و المصبات المويلحة العراقية و دورها كمضائف لبعض الطفيليات

مقدم أطروحة جامعية

Murad, Muhammad Shakir Salih

مشرف أطروحة جامعية

Khalaf, Talib Abbas
Awwad, Abd al-Husayn Habash

أعضاء اللجنة

al-Khafaji, Hayfa Jawad Jawir
Salman, Salman Dawud
Akbar, Manal Muhammad

الجامعة

جامعة البصرة

الكلية

كلية التربية العلمية

القسم الأكاديمي

قسم علوم الحياة

دولة الجامعة

العراق

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2011

الملخص الإنجليزي

The present study, the density and abundance of zooplankton and its infections with ecto and endo parasites in Iraqi marine and estuarine brackish water were studied.

Five stations were chosen, station1 (Shatt Al-Basrah canal before the dam), station 2 (Shatt Al-Basrah canal after the dam), station 3 (Khor Al-Zubair), station 4 (Shatt Al-Arab, Al-Fao), station 5 (North-West Arabian Gulf).

Seasonally horizontal plankton surface samples were collected by using a 120 μm mesh-sized zooplankton net having a mouth aperture of 40 cm in 120 diameter, from January 2010 to October 2010.

Some physical and chemical features such as : air and water temperatures, salinity, pH, dissolved oxygen and total dissolved solids were analyzed, and the identification of the zooplankton and parasites taxa was done, following the most recent literatures.

Quantitative and qualitative studies of zooplankton were carried out.

The values of air temperatures in all stations were ranging from 8.5-48.3˚c. The water temperatures were ranging from 10.9-39.92 C°.

The variations in salinity were ranging from 7.97-52.76 %.

The pH values were ranged between 7.62and 8.46.

The values of dissolved oxygen were ranging from 5.55-11.86 mg / L.

The total dissolved solid values were ranging from 8.9-49.55g / L.

Sixty taxa of zooplankton were identified in the present study.

35 taxa copepods, while 25 taxa were belonging to other zooplankton.

The more abundant Copepoda and other zooplankton at all stations were, Paracalanus aculeatus, Parvocalanus crassirostris, Acartia (Odonotacartia) pacifica, Bestiolina arabica, copepod nauplii, copepodite stages, polychaeta adults and larvae, Cirripedia larvae, planktonic bivalves, planktonic Gastropoda and fish eggs and larvae.

Copepods are the major of the zooplankton were found in the study area, while Calanoid copepod was the most dominant order followed by Cyclopoid then Harpacticoid and Poecilostomatoid.

Eight taxa of Copepoda were recorded for the first time in the study area.

The total numbers of copepods were increased during autumn at station 1 reaching to (135590 Ind / m3), while the lowest number was recorded at station 3 (3479 ind / m3) during winter.

The highest value of other zooplankton were counted at station 1 (58655 Ind / m3) in autumn, while the lowest values were recorded in winter at station 4 reaching to (1015 Ind / m3).

The highest total number of all zooplankton in all study stations recorded (194245 Ind / m3) at autumn in station 1, while the lowest number was counted (6671 ind / m3) during spring at station 4.

Many type of parasites were recorded in copeopods and other zooplankton in the study area as follow : Ellobiopsis chattoni, Ellobiopsis sp., Thalassomyces sp., Blastodinium sp., Zoothaminium sp., Dinoflagellate, peritrich ciliates.

These parasites recorded for the first time in Iraq and the Arabian Gulf except for Ellobiopsis chattoni, and Thalassomyces sp., which recorded in Kuwaiti waters before.

The highest percentage of infections of all copepods was counted 35.7 % in winter at station 4, while the lowest value was 0.73 % at stations 2 during autumn.

The highest percentage of infections in other zooplankton (Rotifer) was 9.42 % at station 1 during autumn, while the lowest percentage of infection was 0.15 % recorded at station 3 during winter.

The highest intensity of the infected copepods was 12.03 at station 1 during summer, while the lowest value was recorded 1.05 in the same station during autumn.

The highest intensity of the infected copepods and Rotifer was 6.3 at station 2 during summer, while the lowest value was 0.8 recorded in the same station during autumn.

Scanning Electron Microscope (SEM) analysis was used in this study for identification of some ecto parasites on copepods.

التخصصات الرئيسية

الأحياء

الموضوعات

• العراق

عدد الصفحات

116

قائمة المحتويات

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-317395