Relative abundance, density and distribution of the harbour porpoise (Phocoena phocoena) along the west coast of the UK

2008 ◽  
Vol 88 (6) ◽  
pp. 1221-1228 ◽  
Author(s):  
L. Goodwin ◽  
C. Speedie

The harbour porpoise (Phocoena phocoena) is the most frequently sighted cetacean in the UK, yet there is a conservation need to assess both abundance and distribution for this species. During May–August, 2002–2004 a boat-based visual survey, employing effort-related line transect methodology was conducted for specified areas of the west coast of the UK. Estimates of relative abundance were made, with full DISTANCE analysis being carried out during 2004 for each of the areas surveyed. A generalized additive model (GAM) was constructed examining porpoise presence in relation to month, position (latitude and longitude), depth and sea surface temperature for all years and for each year of the study individually. Harbour porpoise density showed a significant decrease in the South West, with an increase for West Scotland over the study period, whilst the highest numbers for both Northern Ireland and the Firth of Clyde were recorded in 2003. The porpoise population in the south-west of England was estimated at 163 (67LCI–400UCI) individuals during the months of May and June, 387 (170LCI–877UCI) individuals were present off Northern Ireland during July, 1645 (823LCI–3289UCI) individuals around the Firth of Clyde in July and 3105 (2032LCI–4745UCI) off West Scotland during August and September. The GAM demonstrated that porpoise presence increased around the 100 m depth contour. Whilst further research is required in each of the areas throughout the year, this study provides important information on the distribution and habitat use of the harbour porpoise within UK waters.

1974 ◽  
Vol 69 ◽  
pp. 295-298
Author(s):  
Michael B. Walbank

This document is one of a number of Attic proxeny-decrees that A. G. Woodhead considered to be evidence for Athenian concern with the south-west Aegean towards the end of the fifth century B.C. He identified the honorand Proxenos as a native of Chalke, a small island off the west coast of Rhodes. I share the view of J. and L. Robert that Woodhead has not proved his case either for the date or for the ethnic.The inscription is non-stoichedon, its engraving inexpert and careless, with several mistakes untidily erased and corrected. There is a mixture of Attic and Ionic letter-forms in the first three lines (gamma, eta, and lambda are Ionic, while xi is written chi sigma); otherwise the lettering is Attic, indicating a date before 403 B.C.


Author(s):  
Patrick M. Gaffney

Limpet populations of the genus Patella from the south-west coast of England were examined by means of gel electrophoresis in order to settle debate on the specific status of the three Patella forms. Populations varied morphologically along an east-west gradient, from three distinct forms in the west to continuous intergradation in the east, in accord with earlier studies. Patella collected were divided into three groups on the basis of a complex of external features described by earlier workers, corresponding to the morphologically defined taxa P. vulgata Linn., 1758, P. aspera Röding, 1798, and P. depressa Pennant, 1777. These groups were electrophoretically distinct in five of seven enzyme systems examined, with no hybrids or intermediates. Incomplete speciation and hybridization can be ruled out as possible causes of the observed morphological variation.


2019 ◽  
Vol 69 (2) ◽  
pp. 120-126
Author(s):  
Dominic Ricky Fernandez ◽  
A. Raghunadha Rao ◽  
T. Y. Niji

To describe the onset and evolution of upwelling along the south west coast of India, authors collected a series of conductivity temperature depth measurements on board INS Sagardhwani extending from 7 °N – 15 °N during the period extending from February 2017 - October 2017. In this paper we utilised the undulations of the 23 °C isotherm as a proxy to study the upwelling phenomenon. The upward movement of the waters at the southern tip off India (77.5 °E) in the subsurface levels was observed to commence from late February 2017 in depths around 80 m and by the end of May 2017, it is observed to rise rapidly to the surface. The upwelled waters reach the surface during the 2nd week of July all along the Indian coast, and then intensified during August 2017. Beyond 12 °N maximum upwelling is seen in July and thereafter in early August 2017 upwelling was intense till October 2017.


2019 ◽  
Vol 17 ◽  
pp. 313-346
Author(s):  
Alexandru Bulgaru

The Christianity in Britain has developed in the first centuries, spreading together with the Romanity, Constantine the Great himself being crowned emperor inthis providence. But after the withdrawal of the Roman troops in 410 by Emperor Honorius and after the invasion of the Saxons, Angles and Ithians, Christianity disappeared almost entirely, remaining only among the British natives who run from the Saxon invasion in the Cornwall peninsula, in Wales and on the NW coast of the province. Among the most active missionaries in this province, St. Patrick, who is considered to be the apostle of Ireland, was noted during the same period. Under his influence, the number of monasteries increased and the society that shepherded was profoundly changed. In this universe of faith St. Columba made himself known. Together with his 12 disciples, he headed to the kingdom of Dalriada, a maritime state encompassing the northern Ulster region of Ireland and the south-west coast of Scotland. Here, Saint Columba converted the entire monarchy, obtaining from the king an island to establish a monastery. He was granted the island of Iona on the west coast of Scotland, where he founded a monastery that will become a true focal point of culture and Christianity in the area. From Iona, Celtic Christianity spread throughout Scotland, converting the picts, then passing Hadrian’s Wave to Britain, where the Holy Bishop Aidan founded a monastery on the island of Lindisfarne. Later, St. Augustine of Canterbury, brought the Christianity back into the British Island, being sent there by Pope Gregory the Great.


1872 ◽  
Vol 7 ◽  
pp. 665-666
Author(s):  
Alexander Buchan

So far as regards the annual amounts of the rainfall of Scotland, deduced from observations made at 296 different places, the chief point brought out is the enormous difference between the rainfall of the west and that of the east; the stations along the west coast showing such figures as 40, 45, and 54 inches, as compared with 24, 27, and 30 inches at stations on the east coast, not situated in the immediate neighbourhood of hills. When it is considered that the source of the rainfall is the prevailing south-westerly winds, it is evident that the comparative dryness of such districts as the south shore of the Firth of Forth is due to high land lying to the south-west, which drains the winds of a large portion of their moisture in their passage across them.


1959 ◽  
Vol 96 (5) ◽  
pp. 347-352 ◽  
Author(s):  
W. S. McKerrow

AbstractThe possibility of the Southern Upland Fault of Scotland continuing to the west coast of Ireland is examined critically. No post-Carboniferous faulting has occurred along this line in Ireland. It cannot be connected with any major fault occurring in the Lower Palaeozoic rocks of County Mayo or County Galway; and there is no evidence that it continues as a structural line to the south-west of Carrick on Shannon.


2010 ◽  
Vol 167 (5) ◽  
pp. 173-176 ◽  
Author(s):  
N. J. Davison ◽  
V. R. Simpson ◽  
S. Chappell ◽  
R. J. Monies ◽  
E. J. Stubberfield ◽  
...  

1937 ◽  
Vol 74 (8) ◽  
pp. 337-359 ◽  
Author(s):  
C. T. Trechmann

1. The coral-rock commences nearly everywhere with a basal bed of varying thickness containing a fauna of pre-Pleistocene aspect among which the genus Haliotis (absent from these coasts at the present day), Pleurotomaria, Meiocardia, etc., are noticeable. This faunule may have lived at a depth of 700–1,000 feet.2. The supposition that the southerly anticlines are a later uplift than the main portion of Barbados is supported by the absence of ravines, and the presence of post-coral-rock beds which occur as coastal veneers at low altitudes, and in greater thickness in the south-east corner near Whitehaven.3. The south-east part of the island from Consett Point to Ragged Point has probably extended further seawards in comparatively recent times ; the series of converging faults and dislocations in the cliff sections suggest that the thrusts from the west or south-west may have been resisted by this part of the island.4. The relative claims of fault-scarping or marine erosion in production of the rising terraces is discussed ; and new information regarding the thickness of the coral-rock at sea-level from a boring is detailed.5. The finding of a faunule with Pliocene or possibly Miocene affinities at the base of the coral-rock puts the Oceanic series further back, into the Miocene.


Sign in / Sign up

Export Citation Format

Share Document