Naticid gastropod mollusk Amauropsis islandica in the White Sea intertidal feeds on clams Macoma balthica boring their thin shells. In these habitats, predators can possibly influence size structure of Macoma by eliminating bigger clams. Our previous investigations showed weak predators-prey size correlations, contrary to some literature data (i.e. Kingsley-Smith et al, 2003; Quijon et al, 2007).

Meiobenthic data from 13 tropical (Galapagos Islands) and 10 subtropical (Crete, Eastern Mediterranean) sandy beaches were used for exploring differences in diversity patterns between temperate and tropical areas. Nematodes dominated in terms of abundance at most of the tropical beaches (highest dominance 94%), whereas, copepods predominated in the temperate area, more pronouncedly in exposed conditions where in some cases they exceeded 90%.

 

Nudibranchs can be found in a wide diversity of habitats in Thailand.  They have become popular subjects for underwater photographers and naturalists due to their wide diversity of forms and color patterns.  They are also important predators on many animal groups associated with bottom communities and some are proving to be of interest to scientists due to the presence of chemicals that may have medical applications.  However, little has been known about nudibranchs in Thailand.  In this...

 
 

The collection of marine, freshwater and tropical fish in the Aquarium Varna maintained by researchers at the Institute for Fish Resources , Agricultural Academy formed modern vision of the oldest Aquarium in the Balkans. It is relatively small to assess in the direction of long-term protection. The future imposes cooperative international programs necessary to form a large viable populations.