This work aims to study the importance of mangrove area as nursery grounds for the juvenile of reef fishes in the Red Sea. Juvenile fishes were collected during three seasons in 2010 from three mangrove swamps by a beach seine net. The net was dragged on the bottom for 100 m three times. A total of 269 juvenile fishes were collected, representing 21 species in 19 families. The most abundant species formed about 86% of all collected fishes. Nine species were collected for the first time from mangrove areas in the Egyptian Red Sea. Most of the collected fishes are economically important fishes. Moreover, eleven families were belonging to coral reef fishes. The highest species richness value was recorded in Hamata mangroves. This finding showed that how mangroves could support the life history of many coral reef fishes.ª 2014 Production and hosting by Elsevier B.V. on behalf of National Institute of Oceanography and Fisheries.
The epibiont communities of the two spider crabs Schizophrys aspera and Hyastenus hilgendorfi in Great Bitter Lakes were studied during spring and summer of 2011. A sum of six taxa including twelve species of epibionts was recorded on each of the two investigated crabs. Most of the epibionts were including Protozoa, Hydrozoa, Polychaeta, Cirripedia, Bryozoa and tunicates. Generally, Cirripedia and Polychaeta dominated the other epibiont species on the two investigated spider crabs. Barnacles were the most widespread species on the four examined parts of Schizophrys aspera, whereas the abdomen of Hyastenus hilgendorfi was commonly covered with polychaetes, followed by barnacles while tunicates were dominating on mouth parts, carapace and limbs. Abundance of epibionts increased as the crab size increased.
Macrobenthic invertebrates samples were collected seasonally from five stations, selected according to their environmental ecosystem (marine, brackish and fresh) in Ashtoum El-Gamil protected area. This protectorate is located in the north western part of Lake Manzala. Macrobenthic community was found including thirty five species belonging to four groups. Of these species, 3 Polychaetes, 19 gastropods, 7 bivalves and 6 crustacean. Some of them are freshwater species and others are marine. Gastropods were dominated other groups, the highest average standing crop was recorded in station V. Macrobenthic fauna reached its maximum average value in spring in the whole area, while winter was the minimum productive season. Environmental parameter and nature of the sediment were important factors affecting distribution and abundance of macro benthic invertebrates. But It has been found that the percentage of the live organisms which have been monitored do not exceed 7% of total organisms.
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