Menu

Ireland's sailing, boating & maritime magazine

Displaying items by tag: Fish Stock Book

Several fish stocks are improving according to the Marine Institute's annual Stock Book, just published, which provides impartial scientific advice to the Government on the status of 74 key fish stocks of interest to Ireland.

Haddock, monkfish, megrim, tuna, and some Dublin Bay Prawn stocks have increased and continue to be sustainably fished. Cod, herring and whiting have declined and are slow to recover. Work will continue to rebuilding of these stocks says Marine Minister Charlie Mc Conalogue.

He said the Institute's findings will guide his negotiations at the EU December Fisheries Council meeting on December 10/11 and with Third Countries, including the UK.

The Marine Institute has published the 2023 edition of the Stock Book. This detailed annual publication provides the latest impartial scientific advice to government on the status of 74 key fish stocks of interest to Ireland.

McConalogue said, "I am delighted to receive the Fish Stock Book for 2023. This provides essential information reviewing the state of fish stocks in 2023 and provides management advice for the setting of quotas for 2024. The exemplary work done by the Marine Institute scientists, feeds into the International Council for the Exploration of the Seas (ICES), to generate best available independent scientific advice which guides my negotiations at the December Fisheries Council and with Third Countries, including the UK. It is important that the science and advice is made accessible to industry and other stakeholders through the continued annual publication of the Fish Stock Book.”

The Minister added, “Again in 2023 there is a trend towards improved state for many fished stocks. This solid evidence basis is giving assurance that our policy at national and EU level is making progress on delivering long-term sustainability. Stocks of haddock, monkfish, megrim, tuna, and some of the Dublin Bay Prawn stocks have increased in recent years and continue to be sustainably fished. There are some stocks such as cod, herring and whiting that have declined and are slow to recover, work will continue to rebuilding of these important stocks.”

This is the 31st edition of the annual book, which contains the latest management advice used by decision makers to set sustainable catch levels and fishing quotas for 2024. The publication is an invaluable reference guide for a wide audience, including the Minister’s team of negotiators, the fishing industry, marine scientists, environmental NGOs and third level institutes.

In 2022, Irish vessels landed approximately 157,000 tonnes of wild caught fish worth more than €296 million at first sale. This, in turn, supports a valuable processing industry and other activities in our coastal communities.

Ensuring long term sustainability is a key objective of the Common Fisheries policy. To that end, every year, the Marine Institute undertakes an extensive data collection programme on board commercial vessels, in the ports and on multiple scientific fisheries surveys. Over 200 days, equating to more than 2,000 scientist days, are spent at sea monitoring fisheries resources on Ireland’s state of the art marine research vessels, RV Tom Crean and RV Celtic Explorer.

Onshore and at sea sampling programmes measure over half a million fish and estimate age for a further 56,000 individuals across all commercial species. Irish data are compiled with that from other countries through the intergovernmental organisation ICES. Marine Institute scientists carry out the stock assessments and develop the scientific evidence and advice at ICES. The Stock Book integrates the latest scientific advice from ICES with relevant information on Irish fisheries.

Michael Gillooly, Interim CEO of the Marine Institute said, "I am delighted to see the publication of this year’s Stock Book which is the culmination of a lot of hard work by Marine Institute scientists throughout the year. Our scientists collect, manage and analyse the data need to assess how many fish can be sustainably harvested from this renewable resource. Marine Institute experts collaborate with ICES to develop the robust and independent scientific advice for management. The scientific advice and services provided by our scientists to stakeholders are essential to supporting a sustainable ocean economy, protecting and managing our marine ecosystems and meeting EU obligations. This work is essential to ensure sustainable seafood supplies which is backbone of the coastal economy in many areas."

Dr Ciaran Kelly, Director of Fisheries Ecosystem Advisory Services at the Marine Institute said, "Over the last two decades Ireland has invested significantly in gathering data and improving knowledge of our fisheries resources and marine ecosystems. This paying off in terms of improved science based advice and more sustainable outcomes for seafood production and our ocean. Marine Institute scientists continue to make a significant contribution to the work of ICES and it is noteworthy that the incoming chair of the ICES Advisory Committee (ACOM) is Dr Colm Lordan who has led the work on this year’s Stock Book.”

The 2023 Stock Book is available electronically on the Marine Institute's website https://oar.marine.ie/handle/10793/1873 and as an interactive online application (https://shiny.marine.ie/stockbook/). Most of the scientific work that delivers the Marine Institute's Stock Book is funded under the European Maritime, Fisheries and Aquaculture Fund (EMFAF).

Published in Marine Science

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.