Abstract
At western EgyptianMediterraneanCoast, four cruises (spring 2008, summer 2008, winter 2009 and winter 2010) were carried out to study the temporal, spatial and hydrographical distribution of copepods. 129 copepod species were identified during the present study, dominated by Oithona nana, Calocalanus pavo and Nannocalanus minor. Spring was the most productive and diversified season. The abundance and diversity of copepods was homogeneous among the same seasons at successive two years. A comparison between the present data and that previously recorded in the Egyptian Mediterranean waters indicated large differences in records to the favor of the present work. Fifty five new recorded species of copepods were found in the Egyptian Mediterranean waters for the first time among them thirty two species seem to be recorded in the whole Mediterranean Sea for the first time.
Highlights
At western Egyptian Mediterranean Coast, four cruises were carried out to study the temporal, spatial and hydrographical distribution of copepods. 129 copepod species were identified during the present study, dominated by Oithona nana, Calocalanus pavo and Nannocalanus minor
The present work aimed to follow up hydrographical distribution of copepod community in the Egyptian Mediterranean water, in addition to determination of its spatial and temporal distribution of recorded species
According to the available data, table (1) explains of Ecological affinities and the geographical distribution of recorded species in the Egyptian Mediterranean water and other adjacent water bodies. It is clear from this table; there are 55 copepods species were found in the Egyptian Mediterranean waters for the first time and about 32 species were recorded in the whole Mediterranean Sea for the first time
Summary
1- The study area The study area lies between longitudes 25o and 28.5o and extending between latitude 31o and 32.5o (fig.). The surface water temperature of the study area varies 16.3-17.9oC in winter and 22-27.8oC in summer. PH values at Egyptian Mediterranean coast ranged between 7.98-8.44 in winter and 8.07-8.6 in summer. Dissolved oxygen ranged 4.13-5.32ml/l in winter and 4.83-5.71 ml/l in summer (Hemaida et al, 2008). 2- Samples collection Quantitative and qualitative investigations of copepod community in the study area were performed during four seasons namely spring 2008, summer 2008, winter 2009 and winter 2010. Where: pi = n/N is the proportion of the number of individuals of species (n) to the total number of individuals (N). Where D= richness, S is the number of species and N is the total number of individuals
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