The hydrography of Irvine Bay and its relation to the Clyde Sea Area

1986 ◽  
Vol 90 ◽  
pp. 117-126
Author(s):  
R. E. Lewis
Keyword(s):  
Vertical Mixing ◽  
Density Structure ◽  
Water Density ◽  
Meteorological Forcing ◽  
Longshore Drift ◽  
Inshore Waters ◽  
The Mean ◽  
Clyde Sea ◽  
Sea Area ◽  
Mean Current

SynopsisOver the period 1973–75, detailed studies were made of the water density structure and circulation of Irvine Bay. Observations showed that offshore waters were influenced by water originating in the Clyde Estuary and the inshore waters were affected by brackish outflow from the Irvine-Garnock Estuary. Long period current records indicated that the movement of water in Irvine Bay and the eastern Clyde Sea Area was particularly responsive to meteorological forcing. Based on data for 1974, the estimated annual mean longshore drift was about 5·0cm/s and directed towards the northwest. Studies of a tracer dye patch over a 1·5 day period showed that horizontal dispersion was influenced by vertical shears in the mean current and that vertical mixing was inhibited by a density interface at less than 4 m depth. The average longitudinal and transverse dispersion coefficients were 2·17m2/s and 0·25 m2/s respectively.

scholarly journals A Study of the Spring Diatom Increase in Loch Striven

1930 ◽  
Vol 16 (3) ◽  
pp. 853-878 ◽  
Author(s):  
S. M. Marshall ◽  
A. P. Orr
Keyword(s):  
General Description ◽  
Open Sea ◽  
Inshore Waters ◽  
Clyde Sea ◽  
Sea Area ◽  
Made In

The spring diatom increase in the open sea and probably also in inshore waters is one of the most important annual biological events and information regarding it or its causes is likely to be of value. In an inshore area changes are not only more pronounced, but also take place more rapidly than in the open sea and, for this reason among others, the increase was studied in Loch Striven, a well-sheltered loch in the Clyde Sea Area. A general description of the weekly changes occurring in this loch has already been made (Marshall and. Orr, 1927). The changes during the spring, however, are so rapid that an examination at even closer intervals during this period was thought advisable. Such an examination was made in 1927 and 1928, the interval between successive visits being generally two days. The methods used were the same as those described in the above-mentioned paper.

The fecundity of long rough dabs in the Clyde Sea area

1965 ◽  
Vol 45 (3) ◽  
pp. 599-606 ◽  
Author(s):  
T. B. Bagenal
Keyword(s):  
Common Food ◽  
Muddy Bottom ◽  
The Mean ◽  
The Witch ◽  
One Year ◽  
Clyde Sea ◽  
Sea Area

The fecundity of 180 long rough dabs caught in the Clyde Sea Area from 1957 to 1961 ranged from 9700 eggs in a 12.2 cm fish to 251,300 eggs in one of 30.0 cm. The mean lengths of the fish in the samples each year were different so the comparisons between one year and another were based on the fecundity expected of a 22 cm fish. The differences between years were statistically significant, though successive years did not differ significantly when tested in pairs. The trends of increase and decrease in fecundity were very similar to those of the witch (and different from the plaice). It is suggested that, since witches and long rough dabs (in contrast to plaice) both prefer a muddy bottom, the fecundity variations from year to year might be caused by fluctuations in the abundance of some common food organisms.

scholarly journals On the Fertility of Marine Cladocera with a Note on the Formation of the Resting Egg in Evadne Nordmanni Loven and Podon Intermedius Lilljeborg

1947 ◽  
Vol 26 (4) ◽  
pp. 551-561 ◽  
Author(s):  
C. Cheng
Keyword(s):  
Seasonal Variation ◽  
Sexual Reproduction ◽  
Inverse Relationship ◽  
Statistical Study ◽  
Reproductive Capacity ◽  
Positive Correlation ◽  
Resting Egg ◽  
The Mean ◽  
Clyde Sea ◽  
Sea Area

A statistical study was made of the fertility of Evadne nordmanni, Podon intermedius, P. leuckarti and P. polyphemoides in the Clyde Sea-Area and of the former two species off Plymouth. The mean fertility of parthenogenetic females varies with different species. This is not correlated with the size of the species.Within the species, Evadne nordmanni and Podon intermedius, there exists, in general, a positive correlation between the size and the fertility of parthenogenetic females.The fertility of Evadne nordmanni is subject to seasonal variation. This is not correlated with fluctuations in the abundance of diatoms.An inverse relationship was observed in Evadne nordmanni between the reproductive capacity of parthenogenetic females and the intensity of sexual reproduction.A brief account was given of the formation of the resting egg in Evadne nordmanni and Podon intermedius.

Consumption Rates of Six Species of Marine Benthic Naked Amoebae (Gymnamoebia) From Sediments in The Clyde Sea Area

1997 ◽  
Vol 77 (4) ◽  
pp. 989-997 ◽  
Author(s):  
Helen Butler ◽  
Andrew Rogerson
Keyword(s):  
Consumption Rate ◽  
Bacterial Biomass ◽  
Optimal Consumption ◽  
Rate Data ◽  
Consumption Rates ◽  
The Mean ◽  
Benthic Sediments ◽  
Naked Amoebae ◽  
Clyde Sea ◽  
Sea Area

Six species of naked amoebae, ranging in size from 45 to 3258 μm3, were isolated from benthic sediments of the Clyde Sea area. The number of fluorescently labelled bacteria (FLB) consumed by these amoebae was determined at 5, 10, 15 and 20°C. Consumption rates varied markedly, ranging from 0·2 to 194·7 bacteria h−1(equivalent to 0·16–155·8 μim3bacterial biomass). However, only some of these values were considered to be optimal; several of the uptake values were too low to account for the measured growth rates of amoebae. Using the optimal consumption rate data, the mean specific rates increased from 0·042 bacteria h−1μm3at 5°C to 0·131 bacteria h−1μm−3at 20°C. This is the first study to detail the ingestion rates of a range of bacterivorous marine gymnamoebae.

Growth of the queen scallop, Chlamys opercularis, from the Clyde Sea area

1978 ◽  
Vol 58 (3) ◽  
pp. 687-700 ◽  
Author(s):  
A. C. Taylor ◽  
T. J. Venn
Keyword(s):  
Soft Tissues ◽  
Size Range ◽  
Shell Height ◽  
First Year ◽  
Growth Rings ◽  
Different Dimensions ◽  
The Mean ◽  
Clyde Sea ◽  
Sea Area ◽  
Rates Of Growth

The growth of Chlamys opercularis from three sites in the Firth of Clyde has been studied. A relationship exists between the different dimensions of the shell, but, because growth is allometric, these relationships do not remain constant throughout the life of the animal. In contrast to the rectilinear relationship between the shell dimensions, the cavity volume and the weight of the shell and the weight of the soft tissues increases exponentially with increasing shell height. The growth rings on the shell of Chlamys were shown to be truly annual and are deposited primarily during the period from April to June, providing a convenient and reasonably accurate technique for assessing the age of individual animals. The size range of the height of the first ring was quite large, with a bimodal frequency distribution. The bimodality is lost in the second and subsequent years due to differential rates of growth between large and small first-year animals. The rate of growth of Chlamys from the Clyde Sea area was determined from values for the mean height of each annual ring, and has been compared to the rates shown by Chlamys from other sites around the British Isles.

Hydrodynamic Sediment Environment and Port Development Research in the Sea Area for Matakong Island, Guinea

2015 ◽  
Vol 1092-1093 ◽  
pp. 1213-1218
Author(s):  
Shu Hua Zuo ◽  
Hong Bo Zhao ◽  
Yin Cai
Keyword(s):  
Wave Height ◽  
Suspended Sediment Concentration ◽  
Sediment Concentration ◽  
Seabed Sediment ◽  
Port Development ◽  
Grain Sizes ◽  
Prevailing Direction ◽  
The Mean ◽  
Sea Area ◽  
Mean Current

Based on the observed data, hydrodynamic sediment environment and port development in the Matakong sea area are researched. The results show: (1) the local tide belongs to regular semi-diurnal tide. The mean tide range is 2.42m. The mean current velocity is from 0.11m/s to 0.39m/s, and the max vertical mean current speed is from 0.18m/s to 0.60m/s. The prevailing direction is mainly from W to SW, the mean wave height is less than 1.0m, the maximum wave height is 1.5m around, and the mean period is from 4.6s to 4.7s. (2) Medium grain sizes of seabed sediment samples are from 0.0038mm to 3.0597mm in the dry season and from 0.0075mm to 1.1044mm in the rainy season. (3) Average suspended sediment concentration is 0.02-0.09 kg/m3, and the max sediment concentration presents 0.3kg/m3 approximately. (4) Most parts of the sea area are equilibrium in sixty years, and the erosion and deposited ranges are 3.0cm/a about. (5) After the ore wharf development, deposited sediment is mainly mud. The annual mean deposited strength of the channel is from 0.14m/a to 0.84m/a, and the annual mean deposited strength in the harbor basin is 0.42m/a.

James Thomas Marshall's correspondence (1887–1895) with Scotland's Alexander Somerville: practical, personal and controversial matters in conchology

2009 ◽  
Vol 36 (1) ◽  
pp. 4-25 ◽  
Author(s):  
P. G. MOORE
Keyword(s):  
Nineteenth Century ◽  
Taxonomic Revision ◽  
Marine Science ◽  
The One ◽  
Clyde Sea ◽  
Sea Area ◽  
Molluscan Species

Attention is drawn to the one side remaining of a nineteenth-century correspondence addressed to Alexander Somerville that is housed in the archives of the Scottish Association for Marine Science at Oban, concerning conchological matters. Previously unstudied letters from James Thomas Marshall shed new light on the practicalities of offshore dredging by nineteenth-century naturalists in the Clyde Sea Area; on personalities within conchology; on the controversies that raged among the conchological community about the production of an agreed list of British molluscan species and on the tensions between conchology and malacology. In particular, the criticism of Canon A. E. Norman's ideas regarding taxonomic revision of J. G. Jeffreys's British conchology, as expressed by Marshall, are highlighted.

scholarly journals XXIII.—The Clyde Sea Area

1892 ◽  
Vol 36 (3) ◽  
pp. 641-729 ◽  
Author(s):  
Hugh Robert Mill
Keyword(s):  
The West ◽  
Experimental Physics ◽  
University Of Edinburgh ◽  
Marine Station ◽  
The Government ◽  
Government Grant ◽  
One Year ◽  
The University ◽  
Clyde Sea ◽  
Sea Area

The fjord-like inlets or sea-lochs which form so conspicuous a feature in the scenery of the west of Scotland stand in marked contrast to the shallow, low-shored firths of the east coast. When Dr John Murray decided to extend the physical and biological work of the Scottish Marine Station to the west coast he foresaw that many interesting conclusions were likely to be derived from the study of these isolated sea-basins. Various papers, published by him and other workers, contain preliminary discussions of many of the phenomena observed, fully justifying the anticipations which had been formed.For one year my work, as described in this paper, was carried out under the provisions of an Elective Fellowship in Experimental Physics of the University of Edinburgh, to which I had been elected in 1886; and subsequently by a personal grant from the Government Grant Committee for Scientific Research. The Committee also devoted several sums of money in payment of expenses in compiling this discussion. The Scottish Marine Station throughout gave the use of the steam-yacht “Medusa,” and the necessary apparatus.

XIX.—The Structure and Behaviour of Hiatella gallicana (Lamarck) and H. arctica (L.), with special reference to the Boring Habit

1949 ◽  
Vol 63 (3) ◽  
pp. 271-289 ◽  
Author(s):  
W. Russell Hunter
Keyword(s):  
Special Reference ◽  
Technical Problems ◽  
The University ◽  
Clyde Sea ◽  
Sea Area

Of the genera of rock-boring lamellibranchs which occur in British waters, Hiatella (= Saxicava) is the commonest. But the method of boring remains obscure, and for this reason the present research was suggested by Professor C. M. Yonge, under whose direction it was conducted. Observations were made during 1945 and 1946 in the Clyde Sea Area and at the Millport Laboratory, while other work on living and preserved material from both the Clyde and Plymouth areas was carried out at the Department of Zoology, University of Glasgow. Acknowledgments are due for assistance in technical problems to Dr H. F. Steedman of the University of Glasgow, for help with the nomenclature of the genus to Mr R. Winckworth, and for much kindness and help to the late Mr R. Elmhirst, Director of the Millport Laboratory.

scholarly journals On the performance of a photosystem II reaction centre-based photocell

2017 ◽  
Vol 8 (10) ◽  
pp. 6871-6880 ◽  
Author(s):  
Richard Stones ◽  
Hoda Hossein-Nejad ◽  
Rienk van Grondelle ◽  
Alexandra Olaya-Castro
Keyword(s):  
Photosystem Ii ◽  
Current Noise ◽  
Reaction Centre ◽  
Electron Counting ◽  
The Mean ◽  
Counting Statistics ◽  
Mean Current

We investigate the performance of a theoretical photosystem II reaction centre-inspired photocell device through the framework of electron counting statistics. In particular we look at the effect of a structured vibrational environment on the mean current and current noise.

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