• The distribution and abundance of cephalopod species caught during demersal trawl surveys west of Ireland and in the Celtic Sea

      Lordan, C.; Warnes, S.; Cross, T. F.; Burnell, G. M. (Marine Institute, 2001)
      Distributional and abundance data on seventeen cephalopod species from three demersal trawl series are presented. Data from one the CEFAS March Celtic Sea Groundfish Survey cover the years 1994-1998 inclusive and a depth range of 57-580 m. Data from two Marine Institute surveys was for October-November 1997 only. One of these surveys was west and south west of Ireland between depths of 27-328 m, the other was conducted in deepwater (520-1174 m) to the northwest. Eleven cephalopod species were caught (14,981 individual cephalopods) during the five CEFAS surveys. Spatial and bathymetric distribution data are presented for the species caught and the interannual variability is discussed. The most numerous species in catches was Loligo forbesi (n = 6,803), however, the highest biomass caught was Illex coindetii (418.3kg). Alloteuthis subulata were common close to shore in water depth of less than 75 m. Swept area density estimates are reported for the most abundant species in catches. Ten cephalopod species were caught during the Marine Institute west coast groundfish survey (774 specimens were examined out of an estimated 8,712 caught). The results show broadly similar patterns in species composition, distribution and abundance to the CEFAS survey. Todaropsis eblanae was the second most numerous species in the survey. Only six cephalopod species (n =196) were caught in the Marine Institute deepwater trawl survey. Todarodes sagittatus was the most common species caught. Deepwater octopods including Benthoctopus piscatorum, Benthoctopus ergasticus and Opisthoteuthis massyae were also caught. This chapter provides a base line of data on cephalopod species which are caught in trawl surveys west of Ireland and in the Celtic Sea.
    • A History of common carp Cyprinus carpio (L.) in Ireland: A Review

      Brazier, B.; Caffrey, J. M.; Cross, T. F.; Chapman, D. V. (Marine Institute, 2012)
      This paper represents the most comprehensive and detailed summary of the history of common carp Cyprinus carpio (L.) in Ireland to date. It charts the earliest known introductions of the species to Irish waters, the rise in popularity of recreational angling for the species from c. 1950 onwards, the work carried out to establish the species in Ireland and explains the primary causes of their more recent distribution increase. Much of the historical research material gathered on common carp in Irish waters, including the first recorded details of introduction, is presented here for the first time.