A study by the University of Exeter and Cornwall Wildlife Trust, published in the journal Biodiversity and Conservation, has revealed a disturbing rise in the number of whales, dolphins and porpoises found dead on Cornish beaches.
The frequency of these mammals, collectively known as cetaceans, found stranded on beaches in Cornwall has increased with a sharp rise in the last eight years. After analysing nearly 100 years of data, the researchers believe this could, in part, be due to more intensive fishing.
The research team analysed records of cetacean strandings from 1911 to 2006 from around Cornwall's north and south coasts and the Isles of Scilly. They found a marked increase from the early 1980s, with common dolphins and harbour porpoises being the worst-affected species. In total, fewer than 50 cetacean strandings a year occurred in Cornwall in the 1980s but numbers since 2000 have ranged from 100 to 250 per annum. The south coast of Cornwall experienced the most strandings, particularly around Mount's Bay (Penzance) and two of South East Cornwall's most popular beaches - Looe Bay and Whitsand Bay.
The researchers analysed records of 2,257 cetaceans, 862 of which were common dolphins. They found that, since 1990, at least 61% of incidents in Cornwall are the result of fishing activity, with animals being caught up in nets in a phenomenon known as 'bycatch'. The seas around Cornwall are known to be a major hotspot for large scale fisheries, with many vessels coming from other EU nations.
They analysed data from a rigorous recording scheme, run by Cornwall Wildlife Trust's Marine Strandings Network, which is backed up by full veterinary autopsies as part of a national programme run by the Zoological Society of London and the Natural History Museum.
Dr Brendan Godley of the University of Exeter's Cornwall Campus said: "Many people were shocked by the recent graphic images of the mass dolphin strandings in Cornwall; the cause of which is still a matter of conjecture. We feel that the important message is that strandings have increased in recent years and that the majority are attributable to bycatch in marine fisheries. This is clearly a major issue that needs to be addressed by all stakeholders from Government and the fishing industry in addition to conservation organisations."
The researchers note, however that their findings could, in part, suggest that there are more cetaceans now living off our coastline, as a result of climate change bringing some animals further north.
Joana Doyle, Marine Conservation Officer for Cornwall Wildlife Trust says: "There are several things we need to do in order to safeguard the future of Cornwall's cetaceans. These include establishing a network of Marine Conservation Zones around our coast to protect the species and the habitats they depend on, working closely with the fisheries to develop and test bycatch mitigation measures and pushing for an EU wide ban of pair-trawling for seabass. The strandings and sightings data collected by Cornwall Wildlife Trust is incredibly important for monitoring the status of our cetacean species off the Cornish coast."
Sarah Hoyle | EurekAlert!
Win-win strategies for climate and food security
02.10.2017 | International Institute for Applied Systems Analysis (IIASA)
The personality factor: How to foster the sharing of research data
06.09.2017 | ZBW – Leibniz-Informationszentrum Wirtschaft
University of Maryland researchers contribute to historic detection of gravitational waves and light created by event
On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...
Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.
Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....
Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).
When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...
Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.
How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...
Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.
It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...
17.10.2017 | Event News
10.10.2017 | Event News
10.10.2017 | Event News
19.10.2017 | Materials Sciences
19.10.2017 | Materials Sciences
19.10.2017 | Physics and Astronomy