Tarmac Group of the 1980s, British housebuilding was accounting for half of group profits but it was not the only activity to have been expanded. An alternative profits centre had been built up in the United States, starting in 1984, with the staged acquisition of Lone Star Industries; by the end of the decade Tarmac was operating across seven states in the United States. Construction in the United Kingdom had also grown and Tarmac was involved in such prestige projects as the Thames Barrier and the Channel Tunnel. However, the expansionary nature of the group did not leave it well placed to
Cetacean surfacing behaviour Cetacean surfacing behaviour Cetacean surfacing behaviour or breaching is a group of behaviours demonstrated by the Cetacea infraorder when they come to the water's surface to breathe. Time intervals between surfacing can vary depending on the species, surfacing style or the purpose of the dive, and some species have been known to dive for up to 85 minutes at a time when hunting. In addition to respiration, cetaceans have developed and used surface behaviours for many other functions such as display, feeding and communication. All regularly observed members of the order Cetacea, including whales, dolphins and porpoises, show a range