This weeks article looks at the common bream, a freshwater fish native to part of Europe and Western Asia, a species that was deliberately introduced to improve angling stocks.
This weeks article looks at a species considered to be one of the most potentially damaging to enter Western Europe.
The National Assembly of Panama has approved the ratification of the ballast water management convention… taking Panama one step closer to final ratification.
This week’s article looks at the Faucet Snail – a freshwater species native to Europe. The species was first recorded outside of its native habitat, in the Great Lakes, in the 1870’s.
Five years have passed since the magnitude 9 earthquake struck Japan, unleashing a savage 133-foot high tsunami which claimed the lives of 16,000 people. Upon its retreat, the giant surge of water carried an estimated 5 million tons of debris out to sea – including Japanese docks, ships and household items, which are still arriving along the Pacific coast of the US and Canada five years later.
This weeks invader, more commonly referred to as Dead Mans Fingers, is native to the Pacific Ocean around Japan and Korea. However it was first found in Ireland in 1808, and 30 years later in Scotland. It made an appearance on the shores of the Netherlands just before 1900 and can now be found throughout Europe and along the east coast of the US, from the Gulf of St Lawrence all the way to North Carolina. It is not entirely clear how the species came to travel so far, but it is thought that fouling of ships hulls played a …
In a further twist to what is a hot topic in ballast water treatment – MPN vs CMFDA test methods for ballast water management systems – the Canadian government has confirmed its backing of the MPN method…
Tridentiger trigonocephalus, or the Chameleon Goby, is native to the eastern coast of Asia. It was first spotted in Los Angeles in 1960, and can now also be found in the Mediterranean Sea, the Black Sea and Australia.
This weeks invader is native to the Mediterranean and Northeastern Atlantic ocean. It is a filter-feeding tube worm that can form vast meadows across the sea floor. It is considered an invasive species in Australia, where it was first seen in 1965. The species is thought to have been introduced both as larvae in ballast water and adults attaching themselves to ships hulls. Their presence can be a nuisance as they can reduce fish numbers, destroy aquaculture and clog dredges and nets. They also excrete nitrogen which encourages the growth of algal blooms. (Photo courtesy of scienceimage.csiro.au)
Didemnum Vexillum is thought to be native to Japan, but since the 1990’s there has been a significant increase of the species in North America and Europe.