The distribution of metacercariae of Maritrema arenaria (Digenea: Microphallidae) in the barnacle Balanus balanoides at three sites on the east coast of Northern Ireland

1980 ◽  
Vol 60 (4) ◽  
pp. 959-962 ◽  
Author(s):  
S. W. B. Irwin ◽  
B. C. Irwin
Keyword(s):  
Northern Ireland ◽  
East Coast ◽  
Littorina Littorea ◽  
British Isles ◽  
Littorina Saxatilis ◽  
Nucella Lapillus ◽  
Detailed Survey ◽  
Marked Preference ◽  
Balanus Balanoides

Overall incidence of metacercariae of Maritrema arenaria differed substantially at each of the three sites investigated. In each case, however, numbers were higher than those previously observed in the British Isles. Results indicate that gulls rather than waders are the more important final hosts of this parasite in the areas investigated. At one site where a more detailed survey was carried out metacercariae were more abundant on the upper half of the shore and they displayed a marked preference for barnacles on living Littorina littorea shells as compared to barnacles on rocks. Evidence would suggest that the two most likely molluscan hosts of this trematode are Littorina saxatilis and Nucella lapillus.

A Note on the Distribution of Metacercariae of Maritrema Arenaria in Balanus Balanoides at a Site on the North-East Coast of England

1984 ◽  
Vol 64 (3) ◽  
pp. 734-735
Author(s):  
J. B. Mitchell ◽  
J. Dessi
Keyword(s):  
Northern Ireland ◽  
Rocky Shore ◽  
East Coast ◽  
North East ◽  
The North ◽  
Similar Survey ◽  
A Site ◽  
Balanus Balanoides

The survey of Balanus balanoides (L.) for metacercarial cysts of Maritrema arenaria Hadley and Castle, 1940, on the east coast of Northern Ireland by Irwin & Irwin (1980) prompted us to carry out a similar survey in the north-east of England. The site we selected was a rocky shore at Whitburn, Sunderland (Grid Ref. NZ411 613) from which six separate batches of 100 barnacles, B. balanoides, were examined. The results were as in Table 1.

A second Irish record of Limnephilus borealis (Zetterstedt, 1840) (Trichoptera: Limnephilidae) from Northern Ireland

2018 ◽  
Vol 154 (2) ◽  
pp. 125-128
Author(s):  
James P. O'Connor ◽  
Cathal McNaughton
Keyword(s):  
Northern Ireland ◽  
British Isles

The discovery of the caddisfly Limnephilus borealis at a second site in Northern Ireland strongly suggests that the species is an established native. Within the British Isles L. borealis was previously known only from Scotland.

A massive summer-kill of the dog-whelk, Nucella lapillus, on the north Cornwall coast in 1995: freak or forerunner?

1999 ◽  
Vol 79 (1) ◽  
pp. 103-109 ◽  
Author(s):  
P.E. Gibbs ◽  
J.C. Green ◽  
P.L. Pascoe
Keyword(s):  
High Mortality ◽  
Laboratory Experiments ◽  
Algal Bloom ◽  
Extended Period ◽  
Littorina Littorea ◽  
Nucella Lapillus ◽  
Sewage Outfall ◽  
The North ◽  
Algal Toxicity ◽  
Calm Weather

In the summer of 1995 a massive kill of the dog-whelk, Nucella lapillus, occurred in Bude Bay on the north Cornish coast. High mortality was detectable along 12 km of shoreline. The only other intertidal species affected appeared to be another neogastropod, Ocenebra erinacea. The cause of the kill is unknown but the evidence suggests that it occurred in early July following an extended period of warm, calm weather in June. Possible causes of this event are discussed: algal toxicity may have been responsible since an algal bloom was detected offshore in July in the area. Laboratory experiments exposing gastropods to different species and concentrations of microalgae, designed to test whether N. lapillus is more sensitive than Monodonta lineata and Littorina littorea, gave inconclusive results. No comparable kill has occurred in the Bude area for at least 20 y, but it is suggested that nutrients from a newly-constructed, offshore sewage outfall may now stimulate local algal bloom development during calm weather periods.

Constraints on the significance of the Orlock Bridge Fault within the Scottish Southern Uplands: A discussion of “The Orlock Bridge Fault: a major Late Caledonian sinistral fault in the Southern Uplands terrane, British Isles” by T. B. Anderson and G. J. H. Oliver

1987 ◽  
Vol 78 (3) ◽  
pp. 219-221 ◽  
Author(s):  
J. D. Floyd ◽  
P. Stone ◽  
R. P. Barnes ◽  
B. C. Lintern
Keyword(s):  
Northern Ireland ◽  
Strike Slip ◽  
British Isles ◽  
Giant Step ◽  
Major Strike ◽  
Strike Slip Movement

In their account of the Orlock Bridge Fault of Northern Ireland and its presumed continuation into the Scottish Southern Uplands (the Kingledores Fault) Anderson and Oliver (1986) provide welcome detail in support of major strike-slip movement. However, their identification of the Kingledores Fault as a line of massive strike-slip movement is based on a number of assumptions which are permissible only because biostratigraphical control is generally sparse. In particular the assertion that the Kingledores Fault is a “giant step in the diachronous southerly ascent of the turbidite base” is founded largely on a misinterpretation of evidence recorded by Peach and Horne (1899), Griffith and Wilson (1982) and others.

Conference Report: Rehabilitation and Orthopaedic Engineering

1988 ◽  
Vol 17 (2) ◽  
pp. 81-85 ◽  
Keyword(s):  
Northern Ireland ◽  
Biomedical Engineering ◽  
Conference Report ◽  
City Hospital ◽  
British Isles ◽  
Rehabilitation Engineering ◽  
Belfast City Hospital ◽  
Engineering Society ◽  
Engineering Centre

Papers were invited on the above theme for a Meeting which took place at the Belfast City Hospital on Friday, 27 March 1987. The aim was to provide an opportunity for presentation and discussion of work in rehabilitation and orthopaedic engineering from units throughout the British Isles. The Abstracts below reflect the success of the Meeting and the dedication of the scientific contributors to their topic. The Meeting was jointly organised by The Ulster Biomedical Engineering Society (TUBES) and the Northern Ireland Rehabilitation Engineering Centre and sponsored by Cardiac Services Limited, Belfast.

scholarly journals Climatology, Storm Morphologies, and Environments of Tornadoes in the British Isles: 1980–2012

2015 ◽  
Vol 143 (6) ◽  
pp. 2224-2240 ◽  
Author(s):  
Kelsey J. Mulder ◽  
David M. Schultz
Keyword(s):  
Northern Ireland ◽  
Interannual Variability ◽  
Geographic Distribution ◽  
Environmental Conditions ◽  
High Shear ◽  
British Isles ◽  
Diurnal Cycles ◽  
Isle Of Man ◽  
Time Period ◽  
Tornado Outbreaks

Abstract A climatology is developed for tornadoes during 1980–2012 in the British Isles, defined in this article as England, Scotland, Wales, Northern Ireland, Republic of Ireland, Channel Islands, and the Isle of Man. The climatology includes parent storm type, interannual variability, annual and diurnal cycles, intensities, occurrence of outbreaks (defined as three or more tornadoes in the same day), geographic distribution, and environmental conditions derived from proximity soundings of tornadoes. Tornado reports are from the Tornado and Storm Research Organization (TORRO). Over the 33 years, there were a mean of 34.3 tornadoes and 19.5 tornado days (number of days in which at least one tornado occurred) annually. Tornadoes and tornado outbreaks were most commonly produced from linear storms, defined as radar signatures at least 75 km long and approximately 3 times as long as wide. Most (78%) tornadoes occurred in England. The probability of a tornado within 10 km of a point was highest in the south, southeast, and west of England. On average, there were 2.5 tornado outbreaks every year. Where intensity was known, 95% of tornadoes were classified as F0 or F1 with the remainder classified as F2. There were no tornadoes rated F3 or greater during this time period. Tornadoes occurred throughout the year with a maximum from May through October. Finally, tornadoes tended to occur in low-CAPE, high-shear environments. Tornadoes in the British Isles were difficult to predict using only sounding-derived parameters because there were no clear thresholds between null, tornadic, outbreak, and significant tornado cases.

The Spread of Elminius Modestus Darwin In North-West Europe

1958 ◽  
Vol 37 (2) ◽  
pp. 483-520 ◽  
Author(s):  
D. J. Crisp
Keyword(s):  
East Coast ◽  
Irish Sea ◽  
North Coast ◽  
Long Distance ◽  
North West ◽  
The North ◽  
Competition For Space ◽  
South East England ◽  
The Irish Sea ◽  
Balanus Balanoides

Material collected prior to 1940 indicates that Elminius modestus was not present on British coasts at that time.Elminius increased in abundance in south-east England from 1946 to 1950 and extended its range as far as the Humber, where it halted.Its advance westwards along the south coast was similarly halted at Portland, but by 1948 independent colonies had been established in several of the river systems of Devon and Cornwall, in Milford Haven, and in the Bristol Channel.The first populations in the Irish Sea were in Morecambe Bay. From there Elminius spread rapidly south and west along the north coast of Wales, and more slowly north and west towards Galloway, eventually bridging the sea to the Isle of Man.Detailed observations showed that Elminius advanced along the uniformly favourable north coast of Wales as a definite front moving at a rate of approximately 20–30 km per year. Around Anglesey where tidal currents were stronger it appeared simultaneously in many scattered centres.A distinction is drawn between marginal dispersal taking place under the influence of normal agencies at the boundary of an existing population, and remote dispersal due to an artificial or freak transport over a long distance. In the case of Elminius the maximum distance that is likely to be bridged by marginal dispersal in the absence of strong residual drifts is about 30 miles.Elminius probably first appeared near Southampton, and was introduced into the Thames estuary area probably by remote dispersal. Thence it spread along the east coast and was transported to Holland. Its extension into south Devon, the Bristol Channel, the Irish Sea, and to the French coast must also be attributed to remote dispersal.The main ecological effects of Elminius result from competition for space with Balanus balanoides. Since Elminius breeds in summer, its dominance has a profound effect on the composition of the summer plankton, greatly increasing the number of barnacle nauplii, presumably at the expense of other larvae.

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