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Displaying items by tag: sunfish

Ocean temperatures are rising which have caused an enigmatic ocean giant (sunfish) to venture north into Irish waters and beyond, almost 50 years of observations off the Cork coast have helped confirm.

A study by a team of researchers from Ireland and the UK has found that ocean sunfish — the largest bony fish in the world — expanded their range in the 1990s and 2000s by more than 200km north.

The study, which was published yesterday in the international peer-reviewed journal Marine Biology, analysed sightings of sunfish made from the Cape Clear coastal bird observatory by thousands of experienced bird watchers over 4,600 days of sea watching.

The study’s lead author, Dr Olga Lyashevska, from Galway Mayo Institute of Technology, said the research team found there was a general absence of sunfish sightings before 1989, with three to four sightings annually after that, up until 1999.

But from 2002 to 2007, there was a five-fold increase in sunfish sightings, up to 21.3 per annum, she said.

More reports the Irish Examiner. 

Published in Marine Wildlife
Tagged under

#olympicsailing – Water Rat's article: Is ISAF Alive To Sailing's Survival As An Olympic Sport? has raised the issue about the future viability of the Olympic sailing movement and brought reaction from readers, including Midshipman, who says it begs two interesting questions:

· Is being an Olympic sport good for sailing?

· Why have the amazing advances we have witnessed in technology over the last 15 years not made sailing more accessible and less expensive?

With the exception of the Laser (a manufacturer controlled boat which is not cheap at €7,250), none of the boats used in the Olympics are to be found in mainstream sailing.

The explosion in sailing during the 60's and 70's was fuelled by the development of exciting low cost boats built, mainly by amateurs, in plywood using new adhesive and coating techniques.

The turn of the century has seen vast improvements in the technologies used in boat building, making boats lighter, faster, stronger safer, but certainly not cheaper, as amateur construction can no longer compete with the sophisticated techniques of the boating industry.

That is probably why the most popular dinghy class in the world remains the inexpensive and simple Sunfish while low tech Hobie Beach Cats still dominate the multihull scene.

In years gone by, most young sailors got their start in wooden Optimists, often built by enthusiastic parents at modest cost over a couple of weekends and then typically graduated to a home built Mirror or its equivalent for their first experience of multi crewed sailing with multiple sails.

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A wooden framework of the early Optimist dinghy

Nothing less than a relatively expensive Glass Fibre Optimist will do now and the Street Cred of young people is dependent on graduating to costly Lasers and 420s. In Ireland this situation is also compounded by the sense of failure youngsters experience if they fail to qualify for one of the Academy or Elite development squads which currently involves over 100 youth sailors of varied abilities.

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The scene today – charter boats used at Dun Laoghaire for the 2014 Optimist Europeans

Sailing has become so fixated on exciting performance and elite achievement that it has lost sight of the sheer enjoyment of messing about in boats at modest cost which is the principle attraction to the vast majority of people.

We all admire the highly skilled and motivated sailors who aspire to the ultimate Olympic challenge, but let's face it , what they do has virtually no relevance to the activities of most recreational sailors. ISAF uses racing formats and boats which are not reflective of the sport in general, largely on the grounds of needing to excite TV viewers.

With the exception of horse riding, sailing is probably the most equipment dependent (meaning most expensive) sport in the Olympics. I am not sure that this is a message which ultimately helps encourage people to become involved in sailing.

If we want to use the Olympics as a marketing opportunity for sailing, we should use inexpensive boats which are used on a widespread basis by regular sailors and only have 2 events each for men and women whilst eliminating the cost of shipping boats by supplying evenly matched equipment.

Olympic sailing has created a very costly industry which contributes little back to mainstream sailing. The costs are truly horrendous as demonstrated by the recent announcement that the ISA is appointing an additional CEO to head up a funding programme to raise a further €2.75m a year over and above the €1m plus it receives from the Irish Sports Council for Irish Elite sailing activities.

Does the Irish sailing community believe an annual level of expenditure of €3.75m on elite sailing provides the best economic payback to the sport in Ireland? If we could replicate what has been done in New Zealand, maybe there is a business case which can be justified.

However, €15m seems an outrageous amount of money to propose spending over an Olympic cycle, which is equal to something in excess of €800 on behalf of each member of the ISA.

Let's make sailing accessible, less expensive and more engaging and use the Olympics as a shop window to remove the elitist and esoteric imagery created by the current profile of existing Olympic classes.

What we are doing at the moment is deluding ourselves into believing that presenting our sport like NASCAR or Formula 1 motor racing will attract new people to buy Ford Mondeos and Fiat Pandas. – Midshipman

Published in Your Say

Sharks in Irish waters

Irish waters are home to 71 species of shark, skates and rays, 58 of which have been studied in detail and listed on the Ireland Red List of Cartilaginous fish. Irish sharks range from small Sleeper sharks, Dogfish and Catsharks, to larger species like Frilled, Mackerel and Cow sharks, all the way to the second largest shark in the world, the Basking shark. 

Irish waters provide a refuge for an array of shark species. Tralee Bay, Co. Kerry provides a habitat for several rare and endangered sharks and their relatives, including the migratory tope shark, angel shark and undulate ray. This area is also the last European refuge for the extremely rare white skate. Through a European Maritime and Fisheries Fund (EMFF) project, Marine Institute scientists have been working with fishermen to assess the distribution, diversity, and monthly relative abundance of skates and rays in Tralee, Brandon and Dingle Bays.

“These areas off the southwest coast of Ireland are important internationally as they hold some of the last remaining refuges for angel shark and white skate,” said Dr Maurice Clarke of the Marine Institute. “This EMFF project has provided data confirming the critically endangered status of some species and provides up-to-date information for the development of fishery measures to eliminate by-catch.” 

Irish waters are also home to the Black Mouthed Catshark, Galeus melastomus, one of Ireland’s smallest shark species which can be found in the deep sea along the continental shelf. In 2018, Irish scientists discovered a very rare shark-nursery 200 nautical miles off the west coast by the Marine Institute’s ROV Holland 1 on a shelf sloping to 750 metres deep. 

There are two ways that sharks are born, either as live young or from egg casings. In the ‘case’ of Black Mouthed Catsharks, the nursery discovered in 2018, was notable by the abundance of egg casings or ‘mermaid’s purses’. Many sharks, rays and skate lay eggs, the cases of which often wash ashore. If you find an egg casing along the seashore, take a photo for Purse Search Ireland, a citizen science project focusing on monitoring the shark, ray and skate species around Ireland.

Another species also found by Irish scientists using the ROV Holland 1 in 2018 was a very rare type of dogfish, the Sail Fin Rough Shark, Oxynotus paradoxus. These sharks are named after their long fins which resemble the trailing sails of a boat, and live in the deep sea in waters up to 750m deep. Like all sharks, skates and rays, they have no bones. Their skeleton is composed of cartilage, much like what our noses and ears are made from! This material is much more flexible and lighter than bone which is perfect for these animals living without the weight of gravity.

Throughout history sharks have been portrayed as the monsters of the sea, a concept that science is continuously debunking. Basking sharks were named in 1765 as Cetorhinus maximus, roughly translated to the ‘big-nosed sea monster’. Basking sharks are filter feeders, often swimming with their mouths agape, they filter plankton from the water.

They are very slow moving and like to bask in the sun in shallow water and are often seen in Irish waters around Spring and early Summer. To help understand the migration of these animals to be better able to understand and conserve these species, the Irish Basking Shark Group have tagged and mapped their travels.

Remarkably, many sharks like the Angel Shark, Squatina squatina have the ability to sense electricity. They do this via small pores in their skin called the ‘Ampullae of Lorenzini’ which are able to detect the tiny electrical impulses of a fish breathing, moving or even its heartbeat from distances of over a kilometre! Angel sharks, often referred to as Monkfish have a distinctively angelic shape, with flattened, large fins appearing like the wings of an angel. They live on the seafloor in the coastal waters of Ireland and much like a cat are nocturnal, primarily active at night.

The intricate complexity of shark adaptations is particularly noticeable in the texture of their skin. Composed of miniscule, perfectly shaped overlapping scales, the skin of shark provides them with protection. Often shark scales have been compared to teeth due to their hard enamel structure. They are strong, but also due to their intricate shape, these scales reduce drag and allow water to glide past them so that the shark can swim more effortlessly and silently. This natural flawless design has been used as inspiration for new neoprene fabric designs to help swimmers glide through the water. Although all sharks have this feature, the Leafscale Gulper Shark, Centrophorus squamosus, found in Ireland are specifically named due to the ornate leaf-shape of their scales.