• The Distribution and Abundance of Animals and Plants on the Rocky Shores of Bantry Bay

      Crapp, G B (Department of Agriculture and Fisheries (Fisheries Division), 1973)
      A survey of the rocky shores of Bantry Bay is described. This is intended to serve as a means by which future changes may be detected, as well as providing an account of a hitherto undescribed area of the Irish coast. The abundance of littoral animals and plants was assessed at regular vertical intervals on forty transects, and the distribution patterns of these species are described and discussed in relation to two major environmental variables, emersion and exposure to wave action. The method adopted may be suitable as a standard method for surveying rocky shores, and this is discussed in relation to the objectives of the survey.
    • The Distribution of Irish Char (Salvelinus Alpinus)

      Went, A. E. J. (Department of Agriculture and Fisheries [Fisheries Division], 1971)
      Char* (Salvelinus alpinus) are rare in most places in Ireland to-day but they were formerly more widespread and abundant. About twenty-five years ago the Fisheries Division of the Department of Agriculture and Fisheries started to offer rewards for char submitted for examination and this has had the result of providing specimens which would otherwise have been lost. Many of these specimens wcre taken on rod and line but in recent years considerable numbers have been obtained in connection with either the improvement schemes of the Inland Fisheries Trust, Inc. or investigations concerned with the effects of drainage operations on Lough Conn.
    • Distribution of oyster Ostrea edulis, mussel Mytilus edulis and Anomiid larvae in Bertraghboy Bay, Co. Galway

      Wilson, J H (Department of the Marine, 1988)
      Concentrations and shell lengths of Mytilus edulis, Ostrea edulis and Anomiid larvae were recorded from April to October 1985 in Bertaghboy Bay, Co. Galway. The gamete volume fraction off eggs in female mussels was recorded in an introduced cultivated population of mussels in the inner bay during 1985. Oyster larvae were commonest in July and September, but were concentrated in the upper bay. Mussel and Anomiid distributions were more variable. While the commercial stocks of mussels in the bay contribute to the larval pool, this input is small in relation to that from other sources.
    • The Distribution of the crayfish Austropotamobius pallipes (Lereboullet) in Ireland

      Lucey, J.; McGarrigle, M. L. (Department of Agriculture and Fisheries [Fisheries Division], 1987)
      The distribution of Austropotamobius pallipes, the only freshwater crayfish recorded from Ireland and presumed to be an old native, is described using some 300 records collected since 1976: the positive and negative loci from regularly sampled rivers and streams are used to provide a baseline from which any future changes in distribution can be monitored. Although absent from some regions, most notably the south-west (south of the Dingle-Dungarvan line) and north-west (County Donegal), crayfish are widely spread in the country principally in Carboniferous Limestone areas. The natural chemistry characteristics of the river and stream sites supporting crayfish had the following ranges: pH 7.2 - 8.4, alkalinity 34 - 356 mg/l and hardness 47 - 402 mg/l. Factors which might be important in influencing distribution of A. pallipes in Ireland, including pollution, predation and disease, are discussed.
    • Marine fauna of county Wexford, Ireland: The fauna of rocky shores and sandy beaches

      Healy, B.; McGrath, D. (Marine Institute, 1998)
      Information accumulated during 20 years of investigations on the coast of County Wexford is summarised. Topics include shore descriptions, faunal records, transectal surveys on rocky shores and sandy beaches, cryptofaunal studies on rocky shores, and ecology, reproduction and population dynamics of many of the dominant species. Studies were mainly carried out on exposed and sheltered rocky shores in the region of Camsore Point, Forlorn Point and Hook Head, and sandy beaches at Kilmore Quay, Camsore, Came, Rosslare Harbour and Rosslare Point, but some collections were made in a wide range of habitats throughout the county. A total of 484 taxa were recorded. Carnsore is the type locality for four species of oligochaete and two more are yet to be described. The fauna lacks some of the elements of west Irish coasts but is richer than on the mid-eastern coast owing to the presence of southern species. Differences in species abundance and population structure on south and east coasts are described, and possible reasons for the differences are discussed.