In August-September and from 27.95 to 29.90☌ in November. The water temperature varied slightly from 33.03 to 35.30☌ Water temperatures recorded at different stations are shown in Tableġ. The following parameters, water temperature, salinity (psu), pH, Dissolved The hydrochemical data obtained during the period of sampling covered Parameters of sea water at different stations of oysters beds on theīenthic fauna and Algae abundance and the inter-relationship among benthicįauna and Algae species along the Qatari coast ( Table 1). It was carried out to evaluate the effect of some physical/chemical Of the obtained data (depth, temperature, salinity, pH, dissolved oxygen,Ĭhlorophyll-a, Algae, Porifera, Corals, Polychaeta, Crustacea, Mollusca,Īscidiacea, Echinodermata and total species number) using SYSTAT ®ġ0.2 for Windows.
Principal Component Analysis (PCA) was performed for all Species diversity was determined following Shannon and Weaver Diversity
On each site, under water video and close up photographs were takenįor the oyster beds and their associated living organisms. In the laboratory, the macrofaunaĪnd Algae were sorted according to their taxonomic rank and identified to the Preserved in 5% buffered formalin in seawater. Samples were sieved through 0.5 mm mesh sieve and retained specimens swere Macrobenthos samples were obtainedįrom pearl beds sites along the eastern, south eastern coast of Qatar. Was used for more than 18 min on each location. Samples were collected in triplicates and averaged. Transferred into a polythene bag and stored in ice box on board the research The quadrate area was scooped using a hand shovel to a depth of 10 cm, sample One meter square was used to collect macro-benthic fauna from each station. Quantitative surveysįor community assessment were carried out using SCUBA diving. Determinations of chlorophyll-a (phytoplanktonīiomass indicator) was carried out spectrophotometrically based on the acetoneĮxtraction method described by Parsons et al. The Dissolved Oxygen concentration (DO) was determined by Seawater temperatures, salinity and pH measurements were carried out usingĪ pre-calibrated water quality logging system (Model 38 sonde from Each site was visited once during the period August 2002-December Pearl oyster beds were sampled from 18 locations by R/V Mukhtaber Al-Bihar Oyster associated biota, abundance, distribution and compare the physicalĪnd chemical conditions within oyster beds. The fundamental objectives of this study were to determine the pearl However, the genetics and taxonomy (Khamdan,ġ988) and the morphometric characters (Al-Sayed et al., 1993 Al-Sayed,ġ995 Mohammed, 1994, 1995) were studied in Kuwait, Bahrain and Qatari Oysters and their habitat conditions of the oyster beds were either rarelyĬonsidered or remain unknown. On the associated biota, their distributional abundance, the topographicalįeatures and general ecology as well as community structure of the pearl The pearl oyster fishing industry and fouling in the pearl oyster beds,īesides some valuable information on the anatomy, reproduction biologyĪnd growth of P. Mohammed and Yassien, 2003) have contributed much to our knowledge of Mohammed, 1994 Al-Khayat and Al-Maslamani, 2001 Kimani and Mavuti, 2002 Of oil in the Gulf countries (Al-Matar et al., 1993 Somer, 2003 The pearl oyster fishing industry in the Arabian Gulf declined with theĭevelopment of cultured pearls in Japan during the 1930 and with the discovery Resource which had been exploited for natural pearls from time immemorialĪnd had depended on its main economic resources. Qatar and other Arabian Gulf countries were endowed with a pearl oyster The coast of the United Arab Emirates and Oman in the south (Somer, 2003). Side of Arabian Gulf extending from the Kuwaiti coast in the north to The Pearl oyster Pinctada radiata forms enormous beds in the western Asian Journal of Scientific Research, 1: 544-561. Ecological Features of Oyster Beds Distribution in Qatari Waters, Arabian Gulf. Previous studies has shown similarities between Qatar and other Gulf States Of our findings on the occurrence and distribution of marine biota to Mainly of Algae (4%), Porifera (3%), Cnidaria (8%), Polychaeta (4%), Echinodermata To the variations in the bottom substrates. Varied widely between the different beds and within the same beds due Most of the oyster beds were found in theĪrea with sandy-rocky and Coral blocks bottom forms. Selected oyster beds, within the Exclusive Economic Zone of Qatar were The biodiversity of fauna and flora living within these habitats. The feature of biotic environment of oyster beds and to study quantitatively The aims of the present investigation were to study
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