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Displaying items by tag: marine wildlife

 

Atlantic Dolphins choose to eat high-energy fish to suit their energetic lifestyles, scientists have found.
A study of dolphins off the French coast shows that dolphins shy away from less calorie-dense prey in favour of high-energy food. This dispels a myth that dophins are opportunistic feeders that take any food that comes their way.
The study was carried out by Dr Jerome Spitz and other scientist at the University of La Rochelle in France, who looked at the eating habits of short-beaked common dolphins ( Delphinus delphis ).
This species are the most common type of dolphin in nearby Atlantic waters. The team studied the stomach contents of dolphins caught accidentally in tuna drift nets to see what they ate. They then compared what they found in the dolphins' stomachs with what surveys of trawling fish catches indicated as plentiful in the same waters.
What they found was that dolphins actively select their prey based on its energy density, preferring deep-sea species like lanternfish instead of fish that have lower energy densities.
The dolphins studied turned their noses up at fish with under 5kJ of energy per gram, and sought out rarer breeds of fish that had a higher energy rate.
Two favourites were less common species of  lantern fish, the Kroyer's lanternfish  and the Glacier lanternfish  which have 7.9kJ and 5.9kJ per gram respectively.

Atlantic Dolphins choose to eat high-energy fish to suit their energetic lifestyles, scientists have found.

A study of dolphins off the French coast shows that dolphins shy away from less calorie-dense prey in favour of high-energy food. This dispels a myth that dophins are opportunistic feeders that take any food that comes their way. 


The study was carried out by Dr Jerome Spitz and other scientist at the University of La Rochelle in France, who looked at the eating habits of short-beaked common dolphins.

This species are the most common type of dolphin in nearby Atlantic waters. The team studied the stomach contents of dolphins caught accidentally in tuna drift nets to see what they ate. They then compared what they found in the dolphins' stomachs with what surveys of trawling fish catches indicated as plentiful in the same waters.


What they found was that dolphins actively select their prey based on its energy density, preferring deep-sea species like lanternfish instead of fish that have lower energy densities.
The dolphins studied turned their noses up at fish with under 5kJ of energy per gram, and sought out rarer breeds of fish that had a higher energy rate.


Two favourites were less common species of  lantern fish, the Kroyer's lanternfish  and the Glacier lanternfish  which have 7.9kJ and 5.9kJ per gram respectively. Other less energetic predators, like sharks, are less fussy and take anything that's going.

 

Published in Marine Wildlife

Mr. Sean Connick, T.D., Minister of State at the Department of Agriculture, Fisheries and Food, today (June 29th) launched a milestone report on the effects of climate change on Ireland’s marine ecosystems. The document - Irish Ocean Climate and Ecosystem Status Report 2009 – details a number of significant observations recorded in recent years including: increases in sea surface temperature, increased wave heights off the south west coast and an increase in the number of warm water species in Irish waters, ranging from microscopic plankton to swarms of jellyfish. This report is one of three projects funded as part of the Marine NDP Research Programme (Sea Change) under the Environmental Policy Research Measure.


“It could be argued that one of the greatest challenges our marine food industries - such as fishing and aquaculture - are the effects of marine climate change,” said Minister Connick. “These changes will be primarily driven by the Atlantic Ocean. Research is therefore urgently required to improve our capability to predict marine climate change so that we can preempt and deal with the economic, social, political and environmental consequences that might follow.”

One key finding of the report is that increases of sea surface temperature of 0.6°C per decade have been taking place since 1994, which are unprecedented in the past 150 years. This in turn is linked to an increase in microscopic plants and animals, along with species of jellyfish. Further up the food chain, increased numbers of most warm water fish species have been observed in Irish waters, along with sightings of exotic species such as snake pipefish. Declines in number of seabirds have also been observed which may have a climate link.

“Ireland is strategically placed to play a key role in monitoring ocean-induced changes in our climate and environment,” said Dr. Peter Heffernan, CEO of the Marine Institute. “Geographically the warm southern waters of the Atlantic drift come closer to Ireland than any other country in Europe, where they merge with the cooler northern waters off the coasts of Galway and Mayo. It is here that the predicted biological shifts in marine species diversity or abundance are most likely to occur, making Ireland an ideal laboratory for the study of marine climate change.”







In the long term, the Irish Ocean Climate and Ecosystem Status Report 2009 report predicts that global mean sea level may rise by up to 0.88 m by 2100. This, when combined with the increase in wave heights of 0.8 m that have already been observed off southwest Ireland, could lead to an increased threat of coastal erosion and flooding.

‘We assembled a team who extensively reviewed and analysed our extensive marine databanks on oceanography, plankton and productivity, marine fisheries and migratory species such as salmon, trout and eels with the specific aim of identifying any pattern that might be linked to climate change,” said Dr. Glenn Nolan of the Marine Institute who managed the team. “In some instances these data were painstakingly assembled over a considerable period of time, indeed one of the time series extends back over five decades.”

A second report which reviews the effect of ocean acidification in Irish waters “Ocean Acidification: An Emerging Threat to our Marine Environment - 2010” has also been completed which highlights the growing threat to marine life and fragile ecosystems around the coast as a direct consequence of increased carbon dioxide (CO2) levels in the atmosphere. The report recommends that a nationally coordinated multidisciplinary marine climate change and ecosystem monitoring programme be established that will enable better evaluations to be made of the threats posed to the marine environment and economy by ocean acidification. It emphasises closer links between climate change, ocean acidification and environmental policy development especially in relation to mitigation strategies to reduce carbon emissions.

Sea Change – A Marine Knowledge, Research & Innovation Strategy for Ireland, identified climate change as a priority area for research over the period 2007 to 2013 and this report represents a significant contribution towards achieving the objectives of the marine research programme. It addresses the need to increase our understanding of the drivers and regulators of climate so as to improve the accuracy of advice to Government while at the same time provide key inputs into the national climate change programme of the EPA. It will also improve the reliability of predictive models, and allow researchers to downscale global climate model predictions to the regional/local scale.  As an island nation, it is important to continue to support investment in marine climate change research. This in turn will strengthen Ireland’s ability to develop knowledge-based scenarios on climate change impacts on the various marine sectors and include these in all future social, economic and environmental strategies.

The complete Irish Ocean Climate and Ecosystem Status Report 2009 and Report summary are downloadable from:

http://www.marine.ie/NR/rdonlyres/E581708D-6269-4941-836F-6B012DD7A4BD/0/IrishOceanClimateandEcosystemStatusReport2009.pdf

http://www.marine.ie/NR/rdonlyres/7528902D-2467-4F3E-BF21-39D81AEA4D37/0/SummaryIrishOceanClimateandEcosystemStatusReport2009.pdf

The Ocean Acidification Report can be downloaded from:

http://www.marine.ie/home/publicationsdata/publications/Marine+Foresight+Publications.htm

Published in Marine Wildlife

Scientists at the Marine Institute, Galway, are working with anglers around Ireland to study the migration and diving behaviour of porbeagle sharks (Latin name - Lamna nasus) in the northeast Atlantic. Porbeagle sharks are one of the top marine predators around Ireland, but very little is known about their movement patterns in the northeast Atlantic.

Like most pelagic sharks around the world, the porbeagle shark is vulnerable to fishing pressure due to its high commercial value, slow growth rate and complicated reproductive cycle. However, there is currently no protective legislation for the species, primarily due to a lack of basic information on its biology and ecology.

Marine Institute fisheries scientist Dr. Maurice Clarke said, "Understanding the biology and spatial ecology of the porbeagle shark is key to the conservation of the species and for establishing successful ecosystem-based management strategies in the northeast Atlantic".

To study the movement patterns of porbeagles, scientists are using pop-up satellite tags. These tags are fitted harmlessly to the back of the shark and collect information on the animals' location and depth distribution, together with data on the environment in which the sharks live. Then after nine months the tags pop-up to the surface and transmit the data to polar-orbiting satellites.

With help from expert shark angler, Peter McAuley, three tags were deployed off Downings, Donegal, in September 2008. These data have provided new insight into the migration and diving behaviour of porbeagle sharks around Ireland. One shark, a juvenile male, migrated over 2400 km to Madeira off the west coast of Morocco during the wintertime. Another shark migrated to the Bay of Biscay, a region that is considered a hotspot for other shark-like species such as albacore tuna. The results also showed that porbeagle diving behaviour is linked strongly to the day-night cycle and the monthly lunar cycle.

Daragh Brown of BIM commented that, "These results are really interesting and since there isn't a whole lot known about porbeagle behaviour or habitat preference, even small amounts of data can really advance our knowledge".

This year, Marine Institute scientists are hoping to tag large adult females to find out the location of porbeagle birthing grounds. Currently nothing is known about where these large predators give birth.

The Marine Institute is currently working with the Irish Elasmobranch Group, French Research Institute for Exploration of the Seas (IFREMER), and the Association for the Conservation of Sharks (APECS) to find further funding for the project that will end in 2011. They aim to establish links between the fishing industry, recreational anglers and the public to increase research and awareness for the conservation of these sharks.

Dr. Edward Farrell (Irish Elasmobranch Group) said, "Pelagic sharks have received much global attention recently. Given the increasing pressures that threaten their survival, there is a pressing need for new research to underpin effective management measures".

 

Published in Marine Wildlife

A four-year survey of jellyfish population and movements in the Irish Sea continues this summer, with the public being asked to report sightings of any jellyfish that they see on the water. The EcoJel project is a collaboration between UCC and Swansea University and aims to see whether jellyfish in the Irish Sea could be a potential resource, either as an export product to countries where jellies are a delicacy, or as an attraction for divers who enjoy diving with jellyfish blooms.

The survey also hopes to deepen understanding of jellyfish blooms, which have caused beach closures and fish kills in the Irish Sea in recent years.

For more information, or to report sightings, check out  www.jellyfish.ie

Published in Marine Wildlife
Tagged under

On Saturday May 1st, the Irish Seal Sanctuary made its last journey from Garristown in North Dublin to release three seals in Courtown’s North Beach, Co Wexford. The weekend marked the beginning of a new era for the ISS who are setting up a new head quarters in Courtown. Irish boaters play an important role in identifying and advising the seal sanctuary of stranded or injured seals around the Irish coast. More here

 

Useful links on this story:

http://www.irishsealsanctuary.ie/iss_via/html/main.htm

http://www.irishtimes.com/newspaper/ireland/2010/0503/1224269588723.html

 

Published in Marine Wildlife
Tagged under

The finding of “a well-established, high-density colony” of the freshwater Asian clam in the river Barrow at St Mullins, south Co Carlow, has alarmed fisheries officials and wildlife experts. Michael Parson has the full story in The Irish Times. Dr Joe Caffrey of the Central Fisheries Board said the invasive species posed a threat to salmon, trout and other native species such as the freshwater pearl mussel. The “invader” could damage the food chain in Irish rivers and fatally harm the gravel beds which are used by fish as spawning grounds.

Published in Marine Wildlife
Page 53 of 53

About Dublin Port 

Dublin Port Company is currently investing about €277 million on its Alexandra Basin Redevelopment (ABR), which is due to be complete by 2021. The redevelopment will improve the port's capacity for large ships by deepening and lengthening 3km of its 7km of berths. The ABR is part of a €1bn capital programme up to 2028, which will also include initial work on the Dublin Port’s MP2 Project - a major capital development project proposal for works within the existing port lands in the northeastern part of the port.

Dublin Port has also recently secured planning approval for the development of the next phase of its inland port near Dublin Airport. The latest stage of the inland port will include a site with the capacity to store more than 2,000 shipping containers and infrastructures such as an ESB substation, an office building and gantry crane.

Dublin Port Company recently submitted a planning application for a €320 million project that aims to provide significant additional capacity at the facility within the port in order to cope with increases in trade up to 2040. The scheme will see a new roll-on/roll-off jetty built to handle ferries of up to 240 metres in length, as well as the redevelopment of an oil berth into a deep-water container berth.

Dublin Port FAQ

Dublin was little more than a monastic settlement until the Norse invasion in the 8th and 9th centuries when they selected the Liffey Estuary as their point of entry to the country as it provided relatively easy access to the central plains of Ireland. Trading with England and Europe followed which required port facilities, so the development of Dublin Port is inextricably linked to the development of Dublin City, so it is fair to say the origins of the Port go back over one thousand years. As a result, the modern organisation Dublin Port has a long and remarkable history, dating back over 300 years from 1707.

The original Port of Dublin was situated upriver, a few miles from its current location near the modern Civic Offices at Wood Quay and close to Christchurch Cathedral. The Port remained close to that area until the new Custom House opened in the 1790s. In medieval times Dublin shipped cattle hides to Britain and the continent, and the returning ships carried wine, pottery and other goods.

510 acres. The modern Dublin Port is located either side of the River Liffey, out to its mouth. On the north side of the river, the central part (205 hectares or 510 acres) of the Port lies at the end of East Wall and North Wall, from Alexandra Quay.

Dublin Port Company is a State-owned commercial company responsible for operating and developing Dublin Port.

Dublin Port Company is a self-financing, and profitable private limited company wholly-owned by the State, whose business is to manage Dublin Port, Ireland's premier Port. Established as a corporate entity in 1997, Dublin Port Company is responsible for the management, control, operation and development of the Port.

Captain William Bligh (of Mutiny of the Bounty fame) was a visitor to Dublin in 1800, and his visit to the capital had a lasting effect on the Port. Bligh's study of the currents in Dublin Bay provided the basis for the construction of the North Wall. This undertaking led to the growth of Bull Island to its present size.

Yes. Dublin Port is the largest freight and passenger port in Ireland. It handles almost 50% of all trade in the Republic of Ireland.

All cargo handling activities being carried out by private sector companies operating in intensely competitive markets within the Port. Dublin Port Company provides world-class facilities, services, accommodation and lands in the harbour for ships, goods and passengers.

Eamonn O'Reilly is the Dublin Port Chief Executive.

Capt. Michael McKenna is the Dublin Port Harbour Master

In 2019, 1,949,229 people came through the Port.

In 2019, there were 158 cruise liner visits.

In 2019, 9.4 million gross tonnes of exports were handled by Dublin Port.

In 2019, there were 7,898 ship arrivals.

In 2019, there was a gross tonnage of 38.1 million.

In 2019, there were 559,506 tourist vehicles.

There were 98,897 lorries in 2019

Boats can navigate the River Liffey into Dublin by using the navigational guidelines. Find the guidelines on this page here.

VHF channel 12. Commercial vessels using Dublin Port or Dun Laoghaire Port typically have a qualified pilot or certified master with proven local knowledge on board. They "listen out" on VHF channel 12 when in Dublin Port's jurisdiction.

A Dublin Bay webcam showing the south of the Bay at Dun Laoghaire and a distant view of Dublin Port Shipping is here
Dublin Port is creating a distributed museum on its lands in Dublin City.
 A Liffey Tolka Project cycle and pedestrian way is the key to link the elements of this distributed museum together.  The distributed museum starts at the Diving Bell and, over the course of 6.3km, will give Dubliners a real sense of the City, the Port and the Bay.  For visitors, it will be a unique eye-opening stroll and vista through and alongside one of Europe’s busiest ports:  Diving Bell along Sir John Rogerson’s Quay over the Samuel Beckett Bridge, past the Scherzer Bridge and down the North Wall Quay campshire to Berth 18 - 1.2 km.   Liffey Tolka Project - Tree-lined pedestrian and cycle route between the River Liffey and the Tolka Estuary - 1.4 km with a 300-metre spur along Alexandra Road to The Pumphouse (to be completed by Q1 2021) and another 200 metres to The Flour Mill.   Tolka Estuary Greenway - Construction of Phase 1 (1.9 km) starts in December 2020 and will be completed by Spring 2022.  Phase 2 (1.3 km) will be delivered within the following five years.  The Pumphouse is a heritage zone being created as part of the Alexandra Basin Redevelopment Project.  The first phase of 1.6 acres will be completed in early 2021 and will include historical port equipment and buildings and a large open space for exhibitions and performances.  It will be expanded in a subsequent phase to incorporate the Victorian Graving Dock No. 1 which will be excavated and revealed. 
 The largest component of the distributed museum will be The Flour Mill.  This involves the redevelopment of the former Odlums Flour Mill on Alexandra Road based on a masterplan completed by Grafton Architects to provide a mix of port operational uses, a National Maritime Archive, two 300 seat performance venues, working and studio spaces for artists and exhibition spaces.   The Flour Mill will be developed in stages over the remaining twenty years of Masterplan 2040 alongside major port infrastructure projects.

Source: Dublin Port Company ©Afloat 2020. 

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