DIVERSITY AND DISTRIBUTION OF MACROBENTHOS AND FISHES IN ABU QIR BAY, EGYPT
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1 DIVERSITY AND DISTRIBUTION OF MACROBENTHOS AND FISHES IN ABU QIR BAY, EGYPT Mohamed Reda Fishar and Alaa El-Din El-Haweet National Institute of Oceanography and Fisheries (NIOF), Egypt
2 The Mediterranean coastal region of Egypt extends for about 1000 km, form Salloum (west border) to Rafah (east border). The northern coast of the Nile delta close to the Mediterranean sea is characterized by three shallow lakes; Edku (in the west) Burullus (in the middle) Manzala (in the east) These lakes receive most of the drainage water from the Nile delta land.
3 Study area
4 Prospects for development 1-High biodiversity of fisheries, migratory birds and marine resources 2-High biodiversity of palm and Orchard trees 3-Residential development adjacent to highly populated Alexandria City and economic centers close to the recently established International road 4-Textile industry, fertilizers and Natural gas plants
5 Main Problems and threats to the area Pollution: a. Rosetta branch of the River Nile Abu Qir Bay
6 b. Lake Edku Water discharge via Maadia outlet
7 c. El-Tabia Pumping Station
8 2. Erosion
9 Effects of problems on flora and fauna in the area: The loss of habitat Changes in existing habitat Change on water quality of the bay
10 Sampling sites 1-Abu Qir It lies near Abu Qir city. The area receives a substantial load of industrial, agricultural and domestic pollution. Bottom of the site is sandy black mud with bad odor.
11 2-Lake Edku This coastal lagoon is a basin for agricultural drains and domestic wastes. It covers an area of 126 km² with a mean depth of 1 m. Bottom is muddy with organic detritus and slightly vegetation around the boarder.
12 3-Edku Sea Coast Represent the Edku coastal area at the Abu Qir Bay near Edku city. This area characterized by extended sandy beach and dense fisheries activities.
13 4-Rosetta The sampling site situated near the mouth of Nile River to the Mediterranean Sea. It characterized by the presence of rocky sides and muddy bottom
14 RESULTS A) Fish Distribution of total number of fishes in investigated area Number of individuals Rosetta Edku Abu Qir Lake Edku Site Number Lake Edku 0 Jul.04 ربوتكا- 03 رياني- 04 سرام- 04 ويام- 04 trip Edku Rosetta Abu Qir Site
15 Temporal variations of occurrence % of different fish species in sampling sites Rosetta 31 species recorded Rosseta Alepes djedaba Caranx crysos Dicentrarchus labrax Dussumieria acuta Epieniphelus alexandeinus Hemiramphus picarti Liza aurata Liza salianus Mugil cephylus Penaeus keruthers Sardina pilchardus Sardinella maderensis Stephanolepis hispidus Terapon puta Trichiurus lepturus Trigra lucerna Oct.03 Mar.04 July.04 Sepia spp Occurrence% Species Oct.03 Jan.04 Mar.04 May.04 July.04
16 Polybius henslowi Oreochromus aureus Metapenaeus monoceros Sparus aurata Umbrina serousa Sardinella aurita Solea aegyptiaca Lithognathus mormyrus Hemiramphus far Engraulis encrasicolus Diplodus bellottii Dalophis imberbis Alepes djedaba July.04 Mar.04 Oc t.03 Occurrence% Edku Coast 34 species recorded Edku Coast Oct.03 Jan.04 Mar.04 May.04 July.04 Species Month
17 Occurrence% Sarotherodon galilaeus Tilapia zilli Or eo c hr o mu s nil ot icu s Or eo c hr o mu s au r e us Clarias lazera Lake Edku 5 species recorded Lake Edku July.04 May.04 Mar.04 Month Jan.04 Oct.03 Oct.03 Jan.04 Mar.04 May.04 July.04 c Species
18 Alectis alexandrinus Apogon taeniatus Boops boops Clarias lazera Diplodus vulgaris Hemiramphus far Liza aurata Mugil cephylus Oreochromus Penaeus stebengi Sardina pilchardus Siganus luridus Sparisoma cretensa Sepia spp Stephanolepis Trachinus araneus Uranoscopus Oct.03 May.04 Occurrence% Abu Qir 60 species recorded Abu Qir Oct.03 Jan.04 Mar.04 May.04 July.04 Species Mont h
19 Statistical analysis fish samples collected from Abu Qir Bay during the period from October 2003 to July S (NO. of species) N (Individuals) D (Richness) J (Evenness) H' (Diversity) Rosetta Edku Coast Abu Qir Lake Edku
20 Cluster analysis of fish species between sampling sites
21 84 species were identified Abundance of Fish species in different sampling sites 59 species 8 species 12 species 5 species
22 Percentage of fish species number in sampling area Catadromous fishes 12.31% Fresh water fishes 7.69% Crustacea 14.62% Marine species 65.38%
23 Macrobenthos Qauantitative Community composition Whole area Annelida 22.64% Arthropoda 48% Abu Qir Annelida 15.38% Mollusca 22.96% Mollusca 36.54% Arthropoda 54% Annelida 1.67% Lake Edku Mollusca 36.67% Arthropoda 10% Edku Annelida 4.76% Rosetta Annelida 33.51% Arthropoda 61% Mollusca 85.71% Arthropoda 58% Mollusca 7.57%
24 Spatial distribution 1) Number/m² Annelida Mollusca Arthropoda No. of organism Abu Qir Lake Edku Edku Coast Rosetta Stations 2) Weight/m² Annelida Mollusca Arthropoda G.F.W of organisms Abu Qir Lake Edku Edku Coast Rosetta Stations
25 Statistical data analysis of macrobenthic community S (NO. of species) N (Individual) D (Richness) J (Evenness) H' (Diversity) Rosetta Lake Edku Edku Coast Abu Qir
26 Cluster analysis of macrobenthic community between sampling sites
27 Cluster analysis on macrobenthic species in the whole study area Janthina sp. capetella capitata Synidotea variegata Modiolud barbatus Venerupis Tellina Corophium volutator Gammarus aequicoda Portunus pelagicus Myasis Donax Carcinus maenas Nereis cultifera polydora ciliata Mactra Corallina Balanus amphitrite Nassrius Cypreides littoralis Melanoides tuberculata Cleopatra bulimoides Corbicula Modiolud barbatus Tubificidae sp. Natica sp. Nucula nucleus Chironomus larvae Bellamyia Semisalsa Similarity
28 Abundance of macrobenthic invertebrates recorded from the sampling area 45 species were recorded in the whole Bay
29 Percentage of benthic species number in sampling area Baryozoa 2.22% Hydrozoa 2.22% Ascidiacea 4.44% Mollusca 42.20% Annelida 11.11% Arthropoda 37.80%
30 Annual fluctuation of biodiversity of macrobenthos (number of species recorded) in some parts of Egyptian Mediterranean coastal zones for different surveyed periods Number of species Mollusca Arthropoda Annelida Baryozoa Hydrozoa Ascidiacea Echinodermata Nematoda Alexandria Alexandria Abu Qir bay MEDCORE Survey
31 CONCLUSION The area of study (Abu Qir Bay) have influenced by a great pressure from human impacts which cause a remarkable decrease on biodiversity of fishes and benthic invertebrates. Recommendations Construct reference conditions for benthic assemblages. Develop a monitoring strategy using selected zoobenthic quality elements. Develop benthic and fish community indexes that adequately describe the state of coastal waters.
32 THANK YOU
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