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Displaying items by tag: Blue Crab

Beach walkers have been urged to keep a lookout for invasive blue crab after a recent sighting in Dublin Bay.

As the Irish Examiner reports, the National Biodiversity Day Centre says a specimen was found on Dollymount Strand on 15 February, with a claw from the same species found on the same beach this past Tuesday (9 March).

It marks the first sighting of the crab, which is native marine wildlife on the US east coast, in Irish waters — though it has become established as an invasive species in the Mediterranean.

It’s as yet unknown whether the blue crab originated from the food trade, came as a stowaway in a ship’s hull or arrived by other means.

But the situation has prompted a call for vigilance by the public walking in coastal areas around Ireland — and for photographic evidence of any possible sighting.

The Irish Examiner has more on the story HERE.

Published in Marine Wildlife

Shipyards

Afloat will be focusing on news and developments of shipyards with newbuilds taking shape on either slipways and building halls.

The common practice of shipbuilding using modular construction, requires several yards make specific block sections that are towed to a single designated yard and joined together to complete the ship before been launched or floated out.

In addition, outfitting quays is where internal work on electrical and passenger facilities is installed (or upgraded if the ship is already in service). This work may involve newbuilds towed to another specialist yard, before the newbuild is completed as a new ship or of the same class, designed from the shipyard 'in-house' or from a naval architect consultancy. Shipyards also carry out repair and maintenance, overhaul, refit, survey, and conversion, for example, the addition or removal of cabins within a superstructure. All this requires ships to enter graving /dry-docks or floating drydocks, to enable access to the entire vessel out of the water.

Asides from shipbuilding, marine engineering projects such as offshore installations take place and others have diversified in the construction of offshore renewable projects, from wind-turbines and related tower structures. When ships are decommissioned and need to be disposed of, some yards have recycling facilities to segregate materials, though other vessels are run ashore, i.e. 'beached' and broken up there on site. The scrapped metal can be sold and made into other items.