• LC-UV and LC-MS methods for the determination of domoic acid

      Hess, P.; Morris, S.; Stobo, L.A.; Brown, N.A.; McEvoy, J.D.G.; Kennedy, G.; Young, P.B.; Slattery, D.; McGovern, E.; McMahon, T.; et al. (Elsevier, 2005)
      Under European legislation, domoic acid (DA), the main constituent of amnesic shellfish poisoning, is monitored to protect the shellfish consumer. To ensure comparability amongst analytical data, it was deemed necessary to undertake performance assessments of the methods conducted by monitoring laboratories of the United Kingdom and Ireland. In phase I of a two-phase inter-comparison, three laboratories used high-performance liquid chromatography and ultraviolet detection (HPLC-UV). Concentration data for a DA standard solution, a crude extract of whole scallops and a scallop-homogenate fell within internationally accepted limits, demonstrating good agreement for these matrices. Between-laboratory analyses of a scallop gonad showed a higher variation (>16%). In phase II, a second gonad homogenate containing DA one order of magnitude higher in concentration gave results acceptable to internationally set criteria. The efficiency of the strong anion-exchange cartridges used in sample-extract clean-up should be monitored as part of a laboratory quality control system. From a recovery study, it is suggested that recovery correction should also be applied. There was no difference in the quantitation of DA in standard solutions or shellfish using either LC-UV or LC with mass spectrometric (MS) detection, and between-laboratory MS data for a gonad homogenate were also equivalent. Variations of the published method practised by the monitoring laboratories were found not to compromise results, thus demonstrating an acceptable degree of ruggedness, as well as comparability between the participants.
    • Length-Weight Relationships, Fat Content and Parasitic Infestation of Irish Mackerel

      McArdle, E; Barnwall, E; Nolan, F (Department of Fisheries and Forestry, 1985)
      Landings of mackerel by Irish vessels have increased dramatically in recent years. The total catch in 1982 amounted to 110,000 tonnes which was valued at about 8.5 million pounds, compared with only 8,500 tonnes, values at 0.36 million pounds in 1974. The major cause of the increase has been the introduction of six large trawlers into the fleet around 1980 as a result of which the total catch jumped from 24,000 tonnes in 1979 to 80,000 tonnes in 1980. The main landings into Irish ports are made at Killybegs and Rathmullen, while smaller landings are made into Castletownbere and Galway. Since 1983 considerable quantities have also been landed into western Scottish ports. Most of the catches are taken off the west and northwest coast but again since 1983 the Irish fleet has successfully fished over a wide area extending from west of the Shetland Islands down to Cornwall.
    • Lessons for fisheries management from the EU cod recovery plan

      Kraak, Sarah B. M.; Bailey, Nick; Cardinale, Massimiliano; Darby, Chris; De Oliveira, José A. A.; Eero, Margit; Graham, Norman; Holmes, Steven; Jakobsen, Tore; Kempf, Alexander; et al. (Elsevier, 2012)
      The performance of the EU long-term management plan for cod stocks, in force since 2009, is analysed focusing on the human and institutional factors. The plan operates through landings quotas (TACs) and effort restrictions following a Harvest Control Rule, and deploys a novel instrument allowing Member States to ‘buy back’ or increase fishing effort for fleet segments engaged in cod-avoidance measures. The stipulated fishing mortality reductions have not been achieved. On the positive side, the ‘buy-back’ instrument has led to increased uptake of selective gear and implementation of permanent and real-time temporary closures. On the negative side, ignoring the dimension of fishers as reactive agents in the design, the impact assessment, and the annual implementation of the measures has contributed to the failure to adequately implement the plan and achieve its objectives. The main problem is that the landings quotas taken in a mixed fishery did not limit catches because fishers were incentivised to continue fishing and discard overquota catch while quota for other species was available. The effort limitations intended to reduce this effect were insufficient to adequately limit fishing mortality in targeted fisheries, although fishers experienced them as prohibiting the full uptake of other quotas. Recommendations for future plans include (i) management through catch rather than landings quotas, (ii) the internalisation of the costs of exceeding quotas, (iii) use of more selective gear types, (iv) the development of appropriate metrics as a basis for regulatory measures and for evaluations, (v) participatory governance, (vi) fishery-based management, (vii) flexibility in fishing strategy at vessel level.
    • Lessons from a Marine Spatial Planning data management process for Ireland

      Flynn, Sarah; Meaney, Will; Leadbetter, Adam M.; Fisher, Jeffrey P.; Nic Aonghusa, Caitriona (Informa UK Limited, 2020)
      This paper presents a framework containing ten components to deliver a data management process for the storage and management of data used for Marine Spatial Planning (MSP) in Ireland. The work includes a data process flow and a recommended solution architecture. The architecture includes a central data catalogue and a spatial storage system. The components of the process are presented to maximise the reuse potential of any dataset within an MSP context. The terms ‘Suitability’ and ‘Readiness’ in the MSP context are offered as both formal and considered assessments of data, as is the applicability of a data stewardship maturity matrix. How data contained in such a storage system can be published externally to potential consumers of these data is also explored. The process presents a means of managing data and metadata to ensure data lineage is optimised by carrying information about the origin of and the processing applied to the data; to evaluate the quality and relevance of geospatial datasets for use in MSP decisions in Ireland. The process was piloted in the National Marine Planning Framework for Ireland in the development of draft map products; feedback from the public consultation is ongoing and not presented.
    • Levels of metals and organic contaminants in mussels Mytilus edulis from Cork Harbour - 1989

      Boelens, R G; Nixon, E R; McLaughlin, D (Department of the Marine, 1990-07)
      This study of contaminants in mussels from outer Cork Harbour (Buoy no. 8) has shown that the levels of selected metals and organochlorine substances are generally low and at the lower end of the ranges measured in recent surveys of mussel populations at other European coastal sites.
    • A life history approach to the assessment of deepwater fisheries in the Northeast Atlantic

      Clarke, Maurice (Food and Agriculture Organization of the United Nations, 2005)
      It has been generally stated that deepwater fishes cannot sustain high levels of exploitation because of their characteristic slow growth, longevity and low reproductive output. However deepwater fish species display a wide variety of life-history strategies, occupying diverse positions along the K-r continuum. Literature sources provided data on age, growth, fecundity, maturity and mortality rates of several deepwater teleosts and elasmobranchs. Many teleosts displayed intermediate or conservative life-history characteristics, but the squalid sharks were more stringent K-strategists. These data were used in life-history analyses to assess the sustainability of these mixed-species deepwater fisheries. Whilst there may be scope for compensatory changes in fecundity such scope is likely to be limited, especially for sharks. The implications of these life-history parameters for sustainable exploitation are discussed by way of comparison with continental shelf species from this region.
    • ‘Linking Herring’: do we really understand plasticity?

      Dickey‐Collas, M; Clarke, M; Slotte, A (Oxford University Press, 2009)
      The symposium was organized to link our understanding of herring biology, population dynamics, and exploitation in the context of ecosystem complexity. It is beyond argument that herring play a pivotal role in shaping the structure and dynamics of many boreal continental-shelf ecosystems. Therefore, in moving to an ecosystem approach to fishery management, the time seemed right for ICES to hold another herring symposium. Since the last ICES symposia on herring in the 1960s (“Herring Symposium”, 1961; “Biology of Early Stages and Recruitment Mechanisms of Herring”, 1968), many of the old paradigms have been rejected, and substantial progress has been made by striking out along new avenues. In addressing this particular topic, we were also able to follow on from the decadal herring symposia series held in North America, and thus cover new research from both the ICES and PICES communities. The symposium took place from 26 to 29 August 2008, at the National University of Ireland, Galway, Ireland.
    • List of Fishery Leaflets Nos. 1 (1938) to 111 (1981)

      Anon. (Department of Fisheries and Forestry (Trade and Information Section), 1981)
      These leaflets provide a medium for distributing information on various aspects of fishery research and development undertaken by Officers of the Department. 111 leaflets have been published to date (December, 1981). A list is attached.
    • List of Fishery Leaflets Numbers 1 (1938) to 50 (1973)

      Anon. (Department of Agriculture and Fisheries (Fisheries Division), 1973)
      These Leaflets provide a medium for distributing information on various aspects of fishery research and development undertaken by officers of the Department. 50 Leaflets have been published to date (May 1973). A list is attached.
    • List of fishery leaflets numbers 1 (1938) to 58 (1973)

      Anon. (Department of Agriculture and Fisheries (Fisheries Division), 1974)
      These Leaflets provide a medium for distributing information on various aspects of fishery research and development undertaken by officers of the Department. 58 Leaflets have been published to date (January 1974). A list is attached.
    • A List of Rotatoria Known to Occur in Ireland with Notes on Their Habitats and Distribution

      Horkan, J. P. K. (Department of Agriculture and Fisheries [Fisheries Division], 1981)
      A total of 315 species of rotifers are known to occur in Ireland. Of these 71 belong to the Bdelloidea and 244 to the Monogononta. Three species new to Ireland are now recorded and one of them is also a new record for the British Isles. A taxonomic list of the 315 species is given together with notes on ecology, where possible, and distribution. The names of recorders are included.
    • A List of Scientific and Engineering Papers by Members of the Staff of the Fisheries Division of the Department of Agriculture and Fisheries 1950-1970

      Anon. (Department of Agriculture and Fisheries (Fisheries Division), 1972)
      The Fisheries Division of the Department of Agriculture and Fisheries conducts researches into many aspects of Irish fishes, fishing and fisheries and a considerable number of papers on a wide range of topics have been published over the years in a number of journals including special publications of the Department, namely Irish Fisheries Investigations Series A (Freshwater) and Series B (Marine) and Fishery Leaflets. The present leaflet gives details of papers published by members, or former members, of the Department’s staff since 1950, as a result of their official work or arising there from. In addition to the papers mentioned below members of the Department's staff have contributed to various international bodies other papers, which have not been published subsequently. The list does not, however, include papers prepared by members of the Department's staff, whilst on secondment to semi-state bodies. Some of the authors have now left the service of the Department and details are given as necessary in the following list, Details are also given of the joint authors who were never in the service of the Department.
    • List of some historical papers etc. on Irish fish, fishing and fisheries 1940-1974

      Went, A E J (Department of Agriculture and Fisheries (Fisheries Division), 1978)
      Since 1940 I have had a keen interest in the history of fish, fishing and fisheries in Ireland and in my capacity as an inspector of fisheries I had an unrivalled opportunity, in my travels around the country, to acquire information on fishing methods, which were becoming, or even had became obsolete. For example, when I was preparing my second paper on the Galway Fishery (No. 6 on list below) I made inquiries at the National Museum, Dublin as to what Irish fishing spears were preserved in that museum. I was surprised to learn that very little material of this kind was available, although I knew that “hoards” of salmon spears, seized by the Boards of Fishery Conservators, were kept in various parts of Ireland. Fortunately I was able to have these, and other spears, mainly for eels, collected up and deposited in the National Museum, which can now claim to have a good representative collection of Irish traditional fishing spears for salmon and eels. My paper on Irish fishing spears (No. 29 on list below) resulted from the collection of the fishing spears referred to above. Articles in newspapers and other popular journals have generally been omitted from the list below, because they were usually based on information given in contributions to the journals etc. of learned and other societies. This list also does not include details of papers on the scientific aspects of Irish fisheries, details of which have already been published in Fishery Leaflet No. 25.
    • Litter and waste breakdown game

      Marine Institute (Marine Institute, 2017)
      The aim of this lesson plan is to investigate how long different types of waste take to breakdown, to understand the impact of litter on our natural environment and to identify what we can do to reduce this impact, all through a visual and hands-on game played with a partner or in a small group.
    • The littoral fauna of Dublin Bay

      Wilson, J G (Department of Fisheries and Forestry, 1982)
      The intertidal sediment macrofauna of Dublin Bay was sampled over a total of 313 sites throughout the bay. The most conspicuous organisms were Nephthys caeca, Nephthys hombergi, Scoloplos armiger, Cerastoderma edule and Tellina tenuis, and in general, the fauna reflected the domination of the Bay by the sand habitats on the North and South Bulls. The standing stock of the Bay was dominated by the bivalves, which contributed over 80% of the biomass, and these in turn owed their supremacy largely to C. edule which accounted for over 80% of bivalve biomass. The bivalves were good indicators of the biotopes in the Bay: an outer sandy zone characterised by T. tenuis, and inner sand/mud zone with C. edule and Macoma balthica and muddy lagoons characterised by Scrobicularia plana and occasionally beds of Mytilus edulis. Bivalaves were absent from the inner Tolka basin where Nereis sp. predominated. Shannon-Weiner Index values for the Bay as a whole were good and there was little wide-spread indication of pollution damage.
    • Lobster Trap Census 1968

      Gibson, F A (Department of Agriculture and Fisheries (Fisheries Division), 1969)
      A census made in July and in September, 1968 of the number of traps used in the Irish lobster fishery has been used in this paper as the basis for an analysis of lobster catch. The catch figures supplied to the Fisheries Division by various collectors have been correlated with the gear used in the 12 maritime counties involved.
    • Lobster Trap Census 1969

      Gibson, F A (Department of Agriculture and Fisheries (Fisheries Division), 1970)
      This leaflet adds to the information given in Fishery Leaflet No. 11 (Gibson, 1969) concerning lobster traps used around the Irish coasts in 1968. The catch figures supplied to the Fisheries Division by various collectors have been correlated with the lobster gear used by boats fishing off the 12 maritime counties. The purpose of these continuing records is to provide an annual measure of the effects of fishing upon lobster stocks and thereby to analyse trends in the landings, by comparing annual catch and effort.
    • Lobster Trap Census 1971

      Gibson, F A (Department of Agriculture and Fisheries (Fisheries Division), 1972)
      This leaflet continues the information provided by Fisheries Leaflets 11, 23 and 26. There was little change in the types of Lobster fishing gear in use in 1971 compared with previous years.
    • Lobster trap census 1972

      Gibson, F A (Department of Agriculture and Fisheries (Fisheries Division), 1973)
      This leaflet continues the information provided by Fishery Leaflets Nos. 11, 23, 26, and 39. There was little change in the types of Lobster fishing gear in use in 1972 compared with previous years.
    • Lobster Trap Census, 1970

      Gibson, F A (Department of Agriculture and Fisheries (Fisheries Division), 1971)
      This leaflet continues the information given in Fishery Leaflets No. 11 and 23 concerning lobster traps in use around the Irish coasts. As in previous years the lobster catch figures supplied to the Fisheries Division by various collectors have been correlated with the fishing gear used by boats fishing off the 12 maritime counties. There was little change in 1970 in the preference of the fishermen for the different designs of fishing traps used.