Marine protected areas conserve Mediterranean red coral

Posted on Jun 14, 10 at 12:02 pm. 
Marine protected areas conserve Mediterranean red coral art
A team of Spanish and French researchers has undertaken a pioneer analysis of red coral populations in the oldest Marine Protected Areas in the Mediterranean and the impact that fishing activity has had. Results show that MPAs are a guarantee for conserving this species.... ...
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Baby corals dance their way home

Posted on Jun 14, 10 at 12:02 pm. 
Baby corals dance their way home art
Baby corals find their way home in their first days as free-swimming larvae by listening to the noise of animals on the reef and actively swimming towards it, an international team of researchers working in the Caribbean has discovered. These findings raise new concerns for the future of coral reefs as increasing human noise pollution in the world's oceans is masking reef sounds.... ...
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Buton Diving Destination, Southeast Sulawesi – Why is it Becoming Increasingly Popular?

Posted on Jun 11, 10 at 12:01 pm. 
Buton Diving Destination, Southeast Sulawesi – Why is it Becoming Increasingly Popular? art
Buton Island is becoming an increasingly popular scuba diving destination in its own right, and this comes as no suprise considering it is so close to the world renowned Wakatobi diving region. Why? Mainly because a few local divers have started exploring the diving possibilities and found them very favourable, its easily accessible, and it offers a very different experience to diving in the Wakatobi in terms of coral, fish and invertebrate species commonly seen. ezinearticles.com
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Chemical defenses against generalist fish predators and fouling organisms in two invasive ahermatypic corals in the genus Tubastraea

Posted on Jun 10, 10 at 12:00 pm. 
Chemical defenses against generalist fish predators and fouling organisms in two invasive ahermatypic corals in the genus Tubastraea art
The introduction of exotic marine species has caused considerable economic and ecological damage around the world. Some of these species possess adaptations such as secondary metabolites which facilitate their successful invasion into new areas. In this study we tested two hypotheses: (i) crude extracts produced by two invasive hard corals Tubastraea coccinea and Tubastraea tagusensis, introduced to the southwest Atlantic, inhibit predation by generalist fish; (ii) substances found in the crude extracts of both species reduce or enhance the settlement of other organisms. In an in situ palatability bioassay the extract of T. tagusensis reduced predation by generalist fish. The extracts of both species of coral showed species-specific effects on fouling organisms in in situ gel plate bioassays. Control and extract plates had similar total cover, although plates with extracts had significantly fewer Cladophora sp., and Lithophyllum sp. was only detected on control gels. In contrast, a hydrozoan was only found on plates with extracts and overall community ordination demonstrated clear differences in the fouling communities between treatments. These results demonstrate that both coral species have chemical substances which can bring about a negative interaction with potential fish predators and competitors such as algal and invertebrate foulers and the advantage gained could explain their success in invading new regions to the detriment of local fauna and flora. dx.doi.org
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What Are Scuba Diving Lights?

Posted on Jun 08, 10 at 1:02 am. 
What Are Scuba Diving Lights? art
Dive lights can be used for in a number of different scenarios in scuba diving such as the most common for a night dive but they can also be used for cave diving, diving on over cast days or even looking into a hole or between rocks on a normal day dive. Any diver will know that light brings out the natural colors of creatures and coral that is lost due to lose of colors as you go deeper. Without a good dive light you are unable to see the amazing wildlife hidden in the cracks and crevices. ezinearticles.com
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