Browsing PhD Theses, ATU Galway-Mayo by Subject "Life and Physical Sciences - GMIT"
Now showing items 1-17 of 17
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Age, growth, reproductive biology and population dynamics of the common megrim Lepidorhombus whiffiagottis (Walbaum, 1792) from off the west coast of Ireland
(Galway-Mayo Institute of Technology, 2004)A total of 4,964 common megrim Lepidorhombus whiffiagonis, were examined from commercial catches in Divisions VII b^, off the west coast of Ireland, between April 1997 and February 2001. A sex ratio of 31.8:1 females to ... -
Atlantic herring (Clupea harengus) in the Irish and Celtic Seas; tracing populations of the past and present
(Galway-Mayo Institute of Technology, 2008)Several herring stocks are found around Ireland, of which the Irish and Celtic Seas are two. Herring in the Irish Sea spawn in autumn and in the Celtic Sea spawning takes place in autumn and winter. During the first year ... -
Defining habitat characteristics influencing the distribution, density and growth of Plaice (Pleuronectes Platessa) and Dab (Limanda Limanda) on west of Ireland nursery grounds
(Galway-Mayo Institute of Technology, 2012)Plaice (Pleuronectes platessa, L.) and dab (Limanda limanda, L.) are among the most abundant flatfishes in the north-eastern Atlantic region and the dominant species in shallow coastal nursery grounds. With increasing ... -
The drivers and dynamics of fisher behaviour In Irish fisheries
(Galway-Mayo Institute of Technology, 2013)It is widely acknowledged within the scientific community that a single species approach to European mixed fisheries can result in species-specific advice inconsistent with multi-species management objectives. Within the ... -
An emergent pathogen, phytophthora ramorum, in Irish woodlands
(Galway-Mayo Institute of Technology, 2009)Phytophthora kemoviae and Phytophthora ramorum are both recently discovered pathogens of tree species. The disease that causes P. ramorum has been given the common name of Sudden Oak Death, in the US, because the expression ... -
Estimating fish stock population parameters from bottom trawl surveys: sources and magnitude of uncertainty
(Galway-Mayo Institute of Technology, 2006)Fisheries surveys are widely used in the stock assessment process by providing time series of relative abundance and recruitment strength. Surveys also provide biological data that have the potential to improve stock ... -
Field enhancement of the parasitoid bracon hylobii (Hymenoptera: Braconidae) to control hylobius abietis (Coleoptera: Curculionidae); the large pine weevil
(Galway-Mayo Institute of Technology, 2012)Hylobius abietis (Coleoptera: Curculionidae), the large pine weevil is the most damaging pest of reforestation sites in Ireland. This study examined the possibility of manipulating populations of a species specific parasitoid, ... -
Food production for juvenile seahorse culture
(Galway-Mayo Institute of Technology, 2004)The aim of this project was to find a reliable, cost effective food for production of Hippocampus spp. juveniles. The first feeding preferences in terms o f short term survival and growth were investigated. H. guttulatus ... -
Genetic variability and phylogeography of the invasive zebra mussel, dreissena polymorpha (PALLAS)
(Galway-Mayo Institute of Technology, 2005)The zebra mussel, Dreissena polymorpha (Pallas), a bivalve species originally native to the Black and Caspian seas, has invaded Ireland in the last decade. Five microsatellite loci were used to investigate genetic diversity ... -
A holistic stock analysis of Albacore tuna (Thunnus alalunga) from the North Atlantic Ocean and Mediterranean Sea
(Galway-Mayo Institute of Technology, 2009)Albacore tuna (Thunnus alalunga, Bonnaterre, 1788) is a highly migratory scombrid with a cosmopolitan distribution inhabiting all the worlds’ ocean, in both tropical and temperate regions. Albacore juveniles and adults are ... -
The inshore distribution and abundance of small cetaceans on the West Coast of Ireland: site assessment for SAC designation and an evaluation of monitoring techniques
(Galway-Mayo Institute of Technology, 2009)To date, 24 cetacean species have been recorded in Irish waters. These are protected by a range of legislation, including the Whale Fisheries Act, the Wildlife Acts and the EU Habitats Directive, which oblige Ireland to ... -
Investigation into the early life history of the European flounder (Platichthys flesus L.) with special emphasis in Galway Bay, Irish West Coast
(Galway-Mayo Institute of Technology, 2012)European flounder (Platichthys flesus L.) economic value is estimated to be worth over 68 million to the Irish economy (mainly from recreational angling activities). Despite such large species value, there is a considerable ... -
An investigation into the effects of environmental variables on the early life history stages of fish, with special emphasis on the flatfish of the west of Ireland
(Galway-Mayo Institute of Technology, 2012-10)The temperate waters of the North-east Atlantic host a diverse marine ecosystem, and within that ecosystem fish are a valuable resource both in terms of ecosystem functioning and commercial exploitation. The West Coast of ... -
Investigation of multiwavelength correlations for the VHE gamma-ray blazar markarian 421 from 1995 to 2009
(Galway-Mayo Institute of Technology, 2011)The blazar Markarian 421 is an excellent laboratory for studying the physical processes within the jets of active galactic nuclei. In this thesis, a multiwavelength database has been compiled using data from the Whipple ... -
Investigation of the substrate specificity of glutamyl endopeptidase using casein substrates
(Galway-Mayo Institute of Technology, 2011)Electrophoretically and chromatographically pure P-casein was prepared from acid caseinate exploiting the differential solubility of different caseins in the presence of Ca2+ at 4°C and 30°C. The yield of P-casein was ... -
On the ecology of rorqual whales (Balaenopteridae) in Irish waters using intrinsic markers
(Galway-Mayo Institute of Technology, 2012)Despite repeated calls for an ecosystem-based approach to the management of marine resources, little information exists on the ecosystem role and requirements of top predators such as baleen whales in Irish waters. Considering ... -
Taxonomy of the Lysianassoidea of the Northeast Atlantic and Mediterranean : an interactive identification key and studies on problematic groups
(Galway-Mayo Institute of Technology, 2006)A DELTA (DEscriptive Language for TAxonomy) database was constructed for 135 species of lysianassoid amphipods of the Northeast Atlantic and Mediterranean Sea, representing almost 20% of the total estimated number of ...