Reproduction and Settlement of Mytilus Edulis on an Exposed Rocky Shore in Galway Bay, West Coast of Ireland

1989 ◽  
Vol 69 (2) ◽  
pp. 355-365 ◽  
Author(s):  
P.A. King ◽  
D. McGrath ◽  
E.M. Gosling
Keyword(s):  
Mytilus Edulis ◽  
West Coast ◽  
Rocky Shore ◽  
East Coast ◽  
Rocky Shores ◽  
Marine Mussel ◽  
North East ◽  
The North ◽  
Exposed Shore

The marine mussel, Mytilus edulis, is a widely distributed bivalve, especially abundant on wave washed exposed rocky shores (Lewis, 1964). Investigations on the reproductive and settlement cycles of M. edulis in Irish waters have concentrated to date on sheltered shore populations (Wilson & Seed, 1974; Seed & Brown, 1975; Rodhouse et al., 1984; McKenzie, 1986). An exception to this is a brief account of settlement in Bantry Bay (Cross & Southgate, 1983). Elsewhere in Europe, investigations on the biology of exposed-shore mussels is restricted to the extensive studies of Seed (1969) on the north-east coast of Britain.

Intertidal ostracod (Crustacea: Ostracoda) abundance and assemblage structure within and between four shores in north-east England

1999 ◽  
Vol 79 (6) ◽  
pp. 1045-1051 ◽  
Author(s):  
Susan L. Hull
Keyword(s):  
Cluster Analysis ◽  
East Coast ◽  
Tidal Elevation ◽  
North East ◽  
The North ◽  
Significant Difference ◽  
Exposed Shore ◽  
High Degree ◽  
Degree Of Similarity ◽  
Ostracod Species

Triplicate samples of rockpool algae were collected at each of three tidal elevations (upper, mid and low) from four shores on the north-east coast of England. Two moderately exposed (Ravenscar, the exposed shore at Filey Brigg), and two moderately sheltered (Selwicks Bay, the sheltered shore at Filey Brigg) shores were sampled during one week of spring tides during June 1996. A total of 6866 individual ostracods comprising of 26 ostracod species were recovered from the algal samples. Some species showed significant differences in abundance with tidal elevation across the four shores, e.g. Hirschmannia viridis was significantly more abundant in the upper shore pools. Other species, e.g. Heterocythereisalbomaculata, showed no significant difference in abundance either with tidal elevation or between shores. Significant differences in abundance occurred between shores at a given tidal height in some species, e.g. Semicytherura nigrescens was absent from Selwicks Bay but abundant on the remaining shores. Other species had markedly disjunct distributions, e.g. Callistocythere badia only occurred in the exposed upper shore pools at Filey Brigg. Ostracods were significantly less abundant in the low shore pools. Cluster analysis showed that low shore samples had a high degree of similarity between the four shores whereas the upper and mid-shore samples clustered primarily to shore. A two-way ANOSIM indicated that there was a significant difference in assemblage similarity between the four shores and also between the different tidal elevations.

The Fosse

1924 ◽  
Vol 14 (1-2) ◽  
pp. 252-256 ◽  
Author(s):  
R. G. Collingwood
Keyword(s):  
West Coast ◽  
East Coast ◽  
Nodal Point ◽  
Relative Importance ◽  
East Anglia ◽  
North West ◽  
North East ◽  
The North ◽  
Railway System ◽  
Cross Country

The main lines of communication, in any given country, alter very little from age to age. They are dictated by geography; the vicissitudes of economic and political history may affect their relative importance and alter the details of their lay-out, but nothing except the cessation of traffic can fundamentally change them. This is strikingly exemplified in the relation between the Roman roads of England and its modern railway-system. The main Roman roads are laid out with such accurate attention to geographical facts, that the railway engineers of the nineteenth century were unconsciously forced to imitate their choice of track. In both cases, London is the hub of the system, and main lines radiate to the Channel ports, the Solent, the Exe, the Bristol Channel, the north-west coast, the north-east coast, and East Anglia. In both cases, again, there are certain “cross-country” lines—one from Cheshire to the Usk, one from the Tyne to the Solway, others through the passes of the Pennines. In short, a map of main Roman roads superimposed upon one of main railway-lines shows a very close general agreement, modified by such details as the substitution of Liverpool for Chester as the chief port of the north-west, and the substitution of Reading for Silchester or Shrewsbury for Wroxeter as a nodal point.

The occurrence of the barnacle Elminius modestus in Shetland

1978 ◽  
Vol 58 (3) ◽  
pp. 627-629 ◽  
Author(s):  
K. Hiscock ◽  
S. Hiscock ◽  
J. M. Baker
Keyword(s):  
East Coast ◽  
Rocky Shores ◽  
British Isles ◽  
Northern Limit ◽  
The West ◽  
North East ◽  
The North ◽  
Animal Populations ◽  
Large Populations ◽  
Firth Of Forth

During surveys of rocky shores in Shetland, the Australasian barnacle Elminius modestus was found at 3 out of 42 transect sites and at 6 out of 11 shores searched for its presence. Large populations were present only in Vidlin Voe with a few individuals present at other sites including Lerwick Harbour. These observations extend the northern recorded limit of distribution of E. modestus by approximately 450 km.The spread of the Australasian barnacle Elminius modestus Darwin along the coasts of the British Isles has been followed with interest by marine biologists since the animal was first found in the region of Portsmouth in 1946. Crisp (1958) describes the spread of Elminius up to 1957 and reviews the factors which are important in encouraging or restricting the spread of the species. On the west coast of Scotland, Elminius is common in the Clyde and a few individuals have been recorded on settling panels in Dunstaffnage Bay near Oban (Barnes & Stone, 1972). On the east coast of Scotland, Elminius is known to be common in the Firth of Forth and a few individuals have been recorded from the Tay Estuary (Jones, 1961). Thus, the previous recorded northern limit of distribution of Elminius modestus lies at about 56° 30′ N. Our brief report describes how Elminius has now been found in the northernmost part of the British Isles.As a part of the programme designed to monitor the effects of the oil terminal now being built at Sullom Voe on the north-east coast of the Shetland mainland, we have been concerned with the survey of plant and animal populations on rocky shores.

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.

XX.—Geology of the Outer Hebrides. Part IV.—South Harris

1927 ◽  
Vol 55 (2) ◽  
pp. 457-488 ◽  
Author(s):  
T. J. Jehu ◽  
R. M. Craig
Keyword(s):  
West Coast ◽  
East Coast ◽  
Long Island ◽  
North West ◽  
Narrow Neck ◽  
North East ◽  
The North ◽  
South West ◽  
Outer Hebrides ◽  
South West Coast

Harris is supposed to derive its name from the Gaelic “na hardibh,” a designation signifying “the heights.” The term is appropriate in that the most mountainous parts of the Long Island lie within its boundaries.South Harris forms a natural geographical division for it is divided, from North Harris by a narrow neck of iand at Tarbert separating the eastern from the western seas. This isthmus is less than half a mile across. In addition to South Harris proper, this memoir deals also with the Isle of Scalpay and neighbouring islets off the north-east coast, the Isle of Taran-say on the north-west, and several islands off the south-west coast in the Sound of Harris, of which the principal ones are Ensay, Killegray, Groay, Lingay, and Gilsay.

A Grammar of the Language of Vaturanga, Guadalcanal, British Solomon Islands

1934 ◽  
Vol 7 (2) ◽  
pp. 349-375
Author(s):  
W. G. Ivens
Keyword(s):  
West Coast ◽  
East Coast ◽  
Solomon Islands ◽  
North West ◽  
North East ◽  
The North ◽  
Considerable Portion ◽  
Extreme North

Vaturanga itself is the name given to a small district at the extreme north-west end of the island of Guadalcanal, Solomon Islands; but, according to Bishop J. M. Steward, who worked as a missionary on that end of the island, the language spoken along a very considerable portion of the north-west coast, as well as of the north-east coast, of the island is very closely allied to the language of Vaturanga. In addition, through the work of the Melanesian Mission, the language of Vaturanga has become the “ecclesiastical” language in the schools and churches of the mission throughout the portion of the island indicated.

II.—Further Notes on the Petrography of South Georgia

1916 ◽  
Vol 3 (10) ◽  
pp. 435-441 ◽  
Author(s):  
G. W. Tyrrell
Keyword(s):  
East Coast ◽  
The South ◽  
South Georgia ◽  
South Eastern ◽  
North East ◽  
The North ◽  
New Material ◽  
Rock Specimens

The new material on which this paper is based has lately been received through Mr. D. Ferguson, who recently investigated the geology of the island, and collected the rocks described in an earlier paper. It consists of twenty-seven rock specimens from the south-eastern end of the island, between Cape Disappointment and Cooper Island, and nine specimens from Gold Harbour on the north-east coast between Cooper Island and Royal Bay. All these were collected by the staff of the South Georgia Co., Ltd., under the instructions of Mr. Th. E. Salvesen, managing director, of Leith.

LUCERNE IN THE WELLINGTON, TARANAKI, AND EAST COAST DISTRICTS

1936 ◽  
pp. 92-95
Author(s):  
A.G. Elliott ◽  
T.W. Lonsdale
Keyword(s):  
New Zealand ◽  
West Coast ◽  
East Coast ◽  
General Trend ◽  
Present Position ◽  
Department Of Agriculture ◽  
Forage Crop ◽  
High Rainfall ◽  
The North ◽  
Subsequent Discussion

IN two papers read by officers of the Department of Agriculture at the 1936 conference of the New Zealand Grassland Association, the growing of lucernc as a forage crop in districts of relatively high rainfall was dealt with. The area covered by the papers included the Manawatu and west coast from Paraparaumu to the Patea River(I) and Taranaki(n). During the subsequent discussion on these and other papers the present position and general trend in regard to lucernegrowing in the Wairarapa, Eiawke's Eay, and Poverty Bay districts were also touched on. It is the intention here. to review briefly some of the more important points in regard to the cultivation of lucerne in the southern portion of the North Island as discussed at the conference.

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