• The age Distribution of the Herring Stocks around the Irish Coast during 1993

      Barnwall, E.; Molloy, J. (1994)
      The age distribution of stocks is usually considered as an indication of how healthy a stock may be. In general stocks which are lightly exploited will contain a much larger proportion of older fish than a stock which is heavily exploited. A stock which is heavily exploited will probably be dependent on one year class which will recruit to the fishery and which will immediately be subjected to fishing effort. Obviously in such a fishery failure of recruitment or poor recruitment will have drastic effect on the catches. Herrings can be aged accurately until are about 10 years old and generally recruit to the adult stocks during their third year. During this year, the majority of fish will spawn for the first time.
    • Donegal Bay Herring Investigations, 1967/68

      Bracken, J. J.; Phillips, D. (University College Dublin, 1968)
    • The Dunmore East Herring Fishery, 1958-59

      Bracken, J. J. (Department of Lands, 1959)
    • Dunmore East Herring Investigations, 1965/66

      Molloy, J. (Department of Lands, 1966)
    • Fecundity studies on herring from the north west of Ireland

      McArdle, E. (International Council for the Exploration of the Sea, 1982)
      For some time past studies have been performed on herring fecundities by various scientists. Farren (1938) was the first to suggest that stocks could be separated by studying the different fecundity/length relationship of winter and autumn spawing populations from the Irish coast. Burd and Howlett (1974) calculated a fecundity index by length cubed and as a result clearly separated the spawning populations of Banks and Downs herring in the North Sea. Molloy (1979) regressed fecundity on length cubed for Celtic sea samples and was able to distinguish between the autumn spawning component and the winter spawning component in the Celtic Sea. This paper describes fecundity studies carried out on autumn spawning herring from the newly established management unit (V1a Lower and V11b) off the North west of Ireland. The results are compared with fecundity data from other Irish stocks and with the results obtained by Farran on the same stock over 40 years ago. It may be possible to use these results to calculate the spawning potential of the herring and those spawning off the Scottish coast. The spawning grounds from which these herring were taken are situated a few miles off the North West coast.
    • Fluctuations in the Stock of Herrings on the North Coast of Donegal

      Farran, G. (Conseil International pour l'Exploration de la Mer (ICES), 1930)
    • The Herring Fisheries off the North coast of Donegal

      Farran, G. (Department of Agriculture, 1937)
      The herring fishery which takes place every spring and early summer off the North Coast of Donegal is one of the most regular and uniform on the coast of Ireland, and, as it has been under close observation from a scientific point of view since 1921, a short account of it will serve to illustrate the aims of modern methods of research and the extent to which these methods can lead to results of practical value.
    • The Herring Fishery in Éire, 1921 - 1941.

      Farran, G. (Department of Agriculture, 1944)
      In the following pages an attempt has been made to give a concise summary of the herring fishery in the years from 1921 to 1941, or approximately the period between the two European wars. The abnormal conditions in 1914-1918 were prolonged locally by abnormal transport and generally unsettled conditions until 1923 but, except for increased demand for herrings for export, higher prices and the absence of English and Scottish boats from our shores, the years 1940 and 1941 did not differ markedly from the preceding period.
    • Herring Investigations at Dunmore East - 1962/63

      Bracken, J. J. (Department of Lands, 1963)
    • Herring larval surveys in the Celtic Sea and division VIIj in 1982/83

      Grainger, R. J.; Barnwall, E.; Cullen, A. (International Council for the Exploration of the Sea, 1983)
      Surveys for herring larvae in the Celtic Sea were conducted between October 1982 ~ and February 1983 for the fifth successive season. To take account of the amalgamation of the Celtic Sea and Div VIIJ herring for assessment purposes and to ascertain if many larval drift into the Irish Sea, the survey grid of previous years was modified for the 1982/83 season. However, because of the nature of the larvae distribution it appears reasonable to compare the larvae index for 1982/83 with those of the previous seasons. The increase in indices since 1978/79 has continued up to 1982/83 indicating a steady, but slow, recovery of the spawning stock. Very few larvae appear to drift into the Irish Sea.
    • Herring larval surveys in the Celtic Sea and division VIIj in 1983/1984

      Cullen, A.; Barnwall, E.; Grainger, R. J. (International Council for the Exploration of the Sea, 1984)
      Surveys for herring larvae in the Celtic Sea were conducted for the sixth ~ successive season between October 1983 and February 1984. The modifications made to the survey grid in the previous season to take account of the amalgamation of the Celtic Sea and Division VIIj for assessment purposes and to ascertain if larvae drift into the Irish Sea were also adopted for the 1983/84 surveys. A drift of larvae towards the Irish Sea was apparent in 1983/84. The larval abundance index for 1983/84 based on a standard survey area was almost three times higher than any previous value. A continuous increase in larval indices since 1978/79 indicates a recovery of the spawning stock.
    • Herring larval surveys in the Celtic Sea in 1981/82

      Barnwall, E.; Cullen, A.; Grainger, R. J. (International Council for the Exploration of the Sea, 1982)
      The distributions of herring larvae sampled on ten cruises off the south coast of Ireland during the 1981/82 spawning season are described. A new larval abundance index, which is based on the abundances of <10mm larvae prior to 15 December and on <11mm larvae afterwards,has been calculated for the last four seasons. This index shows an increase each year since 1978/79 indicating that the spawning stock biomass has also increased.
    • Irish Sea Young Herring Survey

      Molloy, J. (An Roinn Iascaigh agus Foraoiseachta, 1979)
      Corrected proof
    • Note on the Growth-Rate of Herrings in the Irish Sea

      Farran, G. (Conseil International pour l'Exploration de la Mer (ICES), 1928)
    • On the Mesh of Herring Drift-Nets in Relation to the Condition Factor of the Fish

      Farran, G. (Conseil International pour l'Exploration de la Mer (ICES), 1936)
      It is well known to herring fishermen that, in order to get the best returns, the mesh of their nets must correspond to the size of the fish on the grounds, but that this correspondence must take into account of both the length and the weight or condition of the fish has not, I think, been clearly pointed out. I have tried in this paper to express in definite figures a relationship between the size of the mesh and the condition and length of the fish taken together.
    • On the Size and Number of the Ova of Irish Herrings

      Farran, G. (Conseil International pour l'Exploration de la Mer (ICES), 1938)
    • Racial analyses of Dunmore East Herring stocks by means of the Otoliths

      Foster, M. (Fisheries Division, Department of Lands., 1963)
      Einarsson (1951) has shown that it is possible to separate in a mixed fishery the winter/spring spawned fish from summer/autumn spawned fish on the basis of the appearance of the nuclei of the otoliths. In general, the winter/spring spawned fish have small hyaline and opaque nuclei, whereas the summer/autumn spawned fish have large hyaline nuclei. Otoliths from herrings taken at Dunmore East in the period 1960 to 1964 were examined and classified using Einarsson's method.
    • Report on the State of the Herring Fisheries North-West of Ireland and West of Scotland

      Molloy, J. (International Council for the Exploration of the Sea, 1970)