Is it climate change or are we looking after our seas better?
Originally Posted by: speckledjim
Dunno, I think it's more complicated than that and is down to a number of factors.
More CO2 would provide an extra boost for plants/animals like phytoplankton at the bottom of the food chain.
The commercial fishing fleets within the Channel Islands aren't as big as they once were and the French are definitely more restricted in their past damaging techniques.
Certain fish species are in big decline, pollack are quite rare, but whether that is because of the explosion in seal numbers I don't know.
Sharks don't seem to have increased, basking sharks are relatively common in the summer, we also get blue, mako, porbeagle, thresher (young one got trapped in one of the marinas in Guernsey a few years back) and even great whites aren't unknown.
In Alderney we used to have about 2% of the Atlantic Gannet population, but it is estimated that we lost up to 25% of that population to avian flu. It's hard to calculate how much fish that number would have eaten. Pre avian flu we had nearly 9,000 breeding pairs on our two colonies.
I'm waiting for the arrival of Orcas. They have been known to transit, with a small pod of four overwintering in 1974.
Cetaceans seem to be increasing generally throughout the British Isles going by the number of strandings and sightings reported by the media. Is that because people are more aware and have smartphones with cameras as standard? Could it be a general recovery due to the demise of commercial whaling?
Alderney, Channel Islands. (previously known as Beaufort)