• Herring fisheries on the south and South-west coasts 1972-73

      Molloy, J (Department of Agriculture and Fisheries (Fisheries Division), 1972)
      The 1972/73 winter herring fishery off the south coast began in the week ending 4 November 1972 and ended on 17 February 1973. The total landings at the ports of Dunmore East and Cobh amounted to 109,301 crans which was slightly short of the record catch of 110,816 crans made in the 1970/71 season. This represents an increase of 29,509 crans on the figure for the 1971/72 season. Eighty three boats, the same number as in 1971/72, took part in the fishery and landings were made on 80 days out of a possible 92. The introduction of a quota system which restricted catches for periods before and after Christmas undoubtedly contributed to the total catch being lower than it could have been.
    • The herring fisheries on the South and South-West coasts 1977-78

      Molloy, J (Department of Agriculture and Fisheries (Fisheries Division), 1978)
      Herring fishing off the south coast, in that area now commonly known as the Celtic Sea, was prohibited during most of the year commencing 1 April 1977. In spite of this, however, nearly 3,000 tans of adult herring are believed to have been taken, mainly by Irish and Dutch vessels. Scientific investigations and the results obtained from a trawling survey carried out from September 1977 to January 1978 indicated that the spawning stock is still in a very depleted condition. Recruitment of young herring to the adults stocks during the last three years has been critically low and because the adult stock size is now estimated to be only 10,000 tons a continuation of the existing ban on fishing must be envisaged for some time. The fishery off the south west coast in 1977, showed an increase in landings largely due to increased catches in November off Fenit, Co Kerry.
    • Herring fisheries on the south and southwest coasts 1973-74

      Molloy, J (Department of Agriculture and Fisheries (Fisheries Division), 1974)
      The 1973/74 winter herring fishery off the south coast began in the week ending 10 November 1973 and ended on 26 February 1974. Some small landings were however made in the weeks before 10 November. The total landing at the ports of Dunmore East and Cobh amounted to 62192 cran. This was 47109 crans lower than the figure for the previous year and was in fact the lowest figure since the 1966/67 season. Seventy three boats, ten less than in the previous season, took part in the fishery. In the interest of conservation of the stocks it had been agreed prior to the opening of the season that no fishing should take place on Sunday nights. This practice was maintained throughout the season with the result that fishing only took place on 58 days out of a possible 90 days. Continuous broken weather throughout January and February also severely hampered fishing operations and because of this the fleet operating from Cobh was able to fish on only 16 nights from Christmas until the 28 February.
    • Herring investigations on the north west and west coasts 1973-74

      Kennedy, T D (Department of Agriculture and Fisheries (Fisheries Division), 1974)
      While the main herring fishery off the north-west coasts covered the period October 1973 to February 1974, a considerable quantity of herrings was also landed during the period March - September 1973. The section of this report covering the north-west coast is thus divided into two sections, that concerned with the period March to September 1973 (the off season) and that with the period October 1973 to February 1974 (the main season). A further section deals with the fishery off the County Galway coast.
    • Herring investigations on the North West and West coasts 1974-75

      Molloy, J; Kennedy, T D (Department of Agriculture and Fisheries (Fisheries Division), 1975)
      The main herring fisheries off the Donegal, Mayo and Galway coasts during 1974/75 are reviewed. Landings in all areas decreased considerably and it is thought that this was due mainly to the very poor weather. Recruitment of young fish to the adult fishery was about average off Donegal and slightly better off Galway. The relationship between these herrings to one another and also to those herring exploited off the Scottish coast is discussed.
    • Herring investigations on the North West and West coasts 1975-76

      Molloy, J; Kennedy, T D (Department of Agriculture and Fisheries (Fisheries Division), 1976)
      The herring fisheries off the northwest and west coasts during 1975 and 1976 are reviewed. Details are given about value of the fishery off the Donegal, Mayo and Galway coasts in recent years. Scientific examinations show that there has been a decline in stock size in the area, chiefly due to poor recruitment of young herring. The question of management of the fishery is also discussed in view of the increased catches by continental fleets fishing in the area.
    • Herring Investigations on the North-West and West Coasts 1971-1972

      Kennedy, T D (Department of Agriculture and Fisheries (Fisheries Division), 1972)
      Although the main herring fishery off the north-west coast in 1971/72 covered the period from October, 1971 to February, 1972, a substantial quantity of herrings was landed during the period March to September, 1971.
    • Herring investigations on the North-west and west coasts 1972-1973

      Kennedy, T D (Department of Agriculture and Fisheries (Fisheries Division), 1973)
      Although the main herring fishery off the north west coast in 1972/73, covered the period from October 1972 to February 1973, a considerable quantity of herrings was also landed during the period March to September 1972. The section of this report covering the north west coast is thus divided into two sections, that concerned with the period March to September 1972 (the off season) and that with the period October 1972 to February 1973 (the main season). A further section deals with the fishery off the west coast, in Galway Bay.
    • Herring Investigations on the North-West Coast 1969 and 1970

      Kennedy, T D (Department of Agriculture and Fisheries (Fisheries Division), 1970)
      Although the main herring fishery off the North-West coast of Ireland now takes place from October to January or early February, considerable quantities of herring are also landed throughout the remainder of the year. This report is thus divided into two sections, one dealing with the period March to September, 1969 (the off season) and the other dealing with the period October, 1969 to February, 1970 (the main season).
    • Herring tagging experiments around Ireland, 1991

      Molloy, J; Barnwall, E; Morrison, J (Department of the Marine, 1993-05)
      The assessment and management of the herring fisheries around Ireland assumes that there are three distinct and separate populations. The management units are based on ICES Areas which, however, are not based on the distribution of the stocks and which do not take into account the mixing that takes place between the different stocks. In July 1992 a herring tagging experiment was carried out, designed to provided information on the migration of the herring around Ireland which would be useful in establishing more realistic management units. In the experiment over 20,000 herring were tagged and liberated - 10,000 southwest of the Isle of Man and 10,000 in Broadhaven Bay. Over 450 tagged fish have been recovered to date and the results suggested considerable movement of herring between the different management units. There appears to be a major link between the Irish Sea stocks and the part of the Celtic Sea stock that spawns off the south east coast of Ireland. A small number of fish tagged off the Mayo coast migrated south to the coast of Kerry. The mixing of these stocks should be taken into account when the various stocks are assessed and when the annual TAC's are estimated.
    • Herrring Investigations on the North-West and West coasts 1976

      Molloy, J; Kennedy, T D (Department of Agriculture and Fisheries (Fisheries Division), 1977)
      The herring fisheries off Donegal, Mayo and Galway in 1976 are reviewed. A serious decline in catches, particularly in the Donegal fishery, took place but this was compensated for by increased prices. The decline in catches is caused mainly by a decrease in stock size, because the recruitment of young herring in recent years has not compensated for the amounts removed by fishing. To minimise the dangers of poor recruitment it would be unwise to allow any fishing to develop on young immature herring in the area. The total international catch off Galway increased considerably in 1976, largely due to increased Dutch effort. International catch restrictions on the total catch are likely to be even more severe in future years.
    • The Impact of Eel Fyke Netting on Other Fisheries

      Moriarty, C (Department of Tourism, Fisheries and Forestry, 1986)
      The small fyke net was introduced to Ireland in 1963 and has been operated extensively in tidal water ever since. Experiments in freshwater began in Lough Corrib in 1967, conducted by the then Department of Agriculture and Fisheries. In 1970 operation by professional fishermen under special authorisations began. It has been effectively demonstrated by the Department's experiments, by information furnished by the professional fishermen and by observations by local fishermen and the Department's officials that fyke nets could be used for eel fishing without harmful effects on other fish stocks. As a result, the fyke net was listed as a "scheduled engine" in the Fisheries Act, 1980
    • Inland storage of crawfish and lobsters

      Farrell, D P (Department of Agriculture and Fisheries (Fisheries Division), 1974)
      Numerous problems occur in the handling and transport of large live crustaceans. The experienced buyer will become familiar with these difficulties over a period of years and will know how best to surmount them in practice. Often, however, the precise cause of the problems is either not known or not appreciated. Satisfactory storage can be achieved by experience alone but a biological appreciation of the precise conditions required for storage of lobsters and crawfish will be most beneficial to the industry, and particularly to those persons entering it for the first time. With this in mind Fisheries Division has been carrying out investigations in this field, and work was advanced rapidly in 1973 by the availability of a research field station at Dunmore East, Co Waterford. A detailed biological study of the storage behaviour of crawfish based on experiments is being undertaken at this station. Meanwhile this Leaflet has been written to give some preliminary results of these investigations, and also to describe one practical commercial result based on early findings.
    • Interaction between seals and salmon drift net fisheries in the west of Ireland

      McCarthy, D T (Department of Fisheries and Forestry, 1985-05)
      The common seal Phoca vitulina L. and the grey seal Halichoerus grypus F. are both present in colonies along the west coast. The common seal inhabits bays and estuaries and inlets with sandy bars mainly in Galway Bay, Clew Bay, Co. Mayo, Ballysadare Bay, Co. Sligo and Donegal Bay. The grey seal is more widely dispersed particularly in the summer months and can be seen in bays, estuaries and offshore islands. Widespread complaints by salmon fishermen in Galway Bay of severe predation by seals on salmon caught in drift nets in 1978 led to a programme to study the problem. In 1979 and 1981 direct observations on board two salmon drifters were made in Galway Bay and in 1980 and 1981 similar work took place on three boats in Sligo Bay. In addition, two crews were interviewed in port each evening. In 1980 salmon landed in Donegal, Galway and Kenmare were examined at market points and the number of seal damaged fish recorded. This leaflet gives the results of the study and concludes that effective control requires measures against the seals which are actually robbing the nets. Destruction of seals at breeding colonies is unlikely to have any positive effect on the rate of predation.
    • Interesting recaptures of tagged salmon in 1973

      Went, A E J (Department of Agriculture and Fisheries (Fisheries Division), 1973)
      In a recent paper (Went, 1973) I gave details of movements of salmon to and from Irish waters based on returns from foreign centres of fish tagged in Ireland and of foreign tagged fish recaptured in Irish waters, This note gives details of the recaptures made in 1973 on similar lines.
    • Interesting recaptures of tagged salmon in 1974

      Went, A E J (Department of Agriculture and Fisheries (Fisheries Division), 1975)
      In a previous issue in the Fishery Leaflet series (No 58, 1973) I gave a list of interesting recaptures of tagged salmon in Irish waters in the year 1973. In this Leaflet I propose to give details of similar fish in 1974 and of some tags recovered in earlier years but not reported until 1974.
    • Inventory of Otolith Collections and Ageing Work on North East Atlantic Deep Water Fish Species

      Connolly, P L; Kelly, C J; Gordon, J D M; Bergstad, O A (Department of the Marine, 1995-03)
      The result of a questionnaire sent to 38 institutes, indicate that a broad range of unpublished raw data exist on many of the deep water fish species in the north east Atlantic and Mediterranean. Of the 18 fish classified by ICES as 'primary' deep water species, one or more of the six Coryphaenoides rupestris, Mora moro, Aphanopus carbo, Hoplostethus atlanticus, Phycis blennoides, Helicolenus dactylopterus were common to most of the institutes which completed the questionnaire. Institutes which possessed some form of otolith or ageing data on these primary fish are grouped by species. A table of institutions which have some form of data on other deep water species (including sharks, rays and Chimaerids) is presented. A list of the main deep water species is given with their English, French, and Spanish common names. In general, there was a very positive response to the setting up of an otolith exchange scheme (by correspondence), as an initial approach to the convening of a deep water ageing workshop. The questionnaire did not provide any indications as to the extent or quality of the various data sets.
    • Investigation into the Toxicity of Corexit - A new oil dispersant

      Griffith, David de G (Department of Agriculture and Fisheries (Fisheries Division), 1969)
      In view of the high degree of toxicity (Smith 1968, Simpson 1968) of BP 1002, Gamlen Oil Spill Remover, Dasic Slickgone and other "detergents" used in Cornwall to combat pollution from Torrey Canyon oil, it was considered desirable to investigate the toxicity of a compound marketed as an oil dispersant under the brand name "Corexit 7664", claimed by the manufacturers to be non-toxic to marine fauna. It is produced by the Standard Oil Company of New Jersey and marketed in the U.K. by the Esso Petroleum Company. It is stated by the manufacturers to be a non-ionic surfactant, soluble in fresh water, 5% NaCL solution and isopropanol, and dispersible in fuel and crude oils. It contains no organic halides or heavy metals. The investigations reported in this paper were made in two experiments. In the first, the toxic effects of straight dilutions of Corexit in seawater were assessed. In the second, the toxicity of Corexit-dispersed crude oil was compared with that of crude oil alone, with an attempt to imitate conditions at low tide on a polluted beach. The first experiment was carried out in Bantry, Co. Cork, using material collected locally. The second experiment was carried out in the laboratory of the Fisheries Division, Department of Agriculture and Fisheries, and the material was collected at Sandycove, eight miles south of Dublin.
    • Irish Mussel Fishery 1971-1972

      Crowley, M (Department of Agriculture and Fisheries (Fisheries Division), 1972)
      Since 1966 the landings of mussels in Ireland have increased significantly. Almost all the mussels landed are exported either in the processed form or live in the shell to Britain and the continent; only a small quantity (only a few cwt.) of live mussels are sold weekly during the season in Dublin. The price of such mussels averages about 7½p per pound. The amount of mussels consumed in the rest of the country is negligible.
    • The Irish shellfish industry 1948-1967

      Gibson, F A (Department of Agriculture and Fisheries (Fisheries Division), 1969)
      The term shellfish is used to group together two very large orders of the animal kingdom, namely the Crustacea and the Molluscs. These orders are not closely related to each other; the main characteristics they have in common being that neither of' them has an internal supporting structure or skeleton. However, they live in similar environments, mainly in the sea, although a few inhabit fresh water, Many hundreds of individual species occur in Irish waters, but only a small number of these are commercially important. These include lobsters, crawfish, Dublin Bay prawns (Nephrops), crabs (all crustaceans), periwinkles, oysters, escallops, mussels, cockles, whelks and clams (all molluscs). During the twenty year period 1948 to 1967, reviewed in this paper, the Irish shellfish industry has changed in many respects. In some sectors methods of fishing have been improved, farming techniques have been introduced and the development of markets on Continental Europe has encouraged the use of improved methods of handling and transport of shellfish to these distant destinations, Nevertheless the rate of expansion of the shellfish industry has been comparatively slow.