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  • 11
    Electronic Resource
    Electronic Resource
    Separation of the two Atlantic species of Pomatoceros, P. lamarckii and P. triqueter (Annelida: Serpulidae) by means of biochemical genetics (1982)
    Springer
    Marine biology 71 (1982), S. 257-264 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In order to confirm the status of two proposed species of the serpulid Pomatoceros, the electrophoretic mobilities of 13 enzymes encoded at 19 loci in P. lamarckii (Quatrefages) and P. triqueter (L.) were compared using horizontal starch gel electrophoresis. The serpulids were sampled from Menai Bridge (North Wales), Plymouth (England) and the Isle of Man in the winter of 1981/1982. Six loci were monomorphic or nearly so and showed no useful or significant difference between species. At a further 7 loci, some of the allozymes common to both species were present, though usually at significantly different frquencies, while others were species-specific. The remaining 6 loci presented species-specific allozymes. In P. lamarckii, 61% of the loci were polymorphic compared with 50% in P. triqueter. The mean observed heterozygosity was 0.169 for P. lamarckii and 0.208 for P. triqueter. Calculation of genetic distance and identity gave values of 0.821 and 0.440, respectively. This study, therefore, confirms the existence of two separate species of Pomatoceros as has been previously proposed on the basis of opercular structure and supported by ecological separation where these species occur sympatrically.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00397042
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  • 12
    Electronic Resource
    Electronic Resource
    Influence of Filming and of Surface Texture on the Settlement of Marine Organisms (1960)
    [s.l.] : Nature Publishing Group
    Nature 185 (1960), S. 119-119 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A second assumption frequently made is that marine larvae will attach themselves to a roughened surface more readily than to a smooth one. Both these assumptions are being currently tested on a variety of invertebrate larvae. Small rectangular pieces of chemically inert material are used, the ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/185119a0
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  • 13
    Electronic Resource
    Electronic Resource
    Effect of Low Temperature on the Breeding of Marine Animals (1957)
    [s.l.] : Nature Publishing Group
    Nature 179 (1957), S. 1138-1139 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Arctic forms Iiving in temperate latitudes generally produce fertilized eggs in winter or in early spring, which suggests an inability to breed at higher temperatures. However, there is little evidence that in arctic waters they spawn over a more extended period, or that the season of egg ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1791138b0
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  • 14
    Electronic Resource
    Electronic Resource
    The Australasian Barnacle, Elminius modestus , in France (1957)
    [s.l.] : Nature Publishing Group
    Nature 179 (1957), S. 482-483 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In the first of these areas much of the coastline is characterized by gently sloping sandy or shingle beaches, but E. modestus could be found wherever there were suitable surfaces for settling and was almost as common on the open coast as in the sheltered harbours and estuaries. It was notably ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/179482b0
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  • 15
    Electronic Resource
    Electronic Resource
    Demonstration of Small-scale Water-currents by means of Milk (1956)
    [s.l.] : Nature Publishing Group
    Nature 178 (1956), S. 1076-1076 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In our technique the animals are placed in a small vessel of still water and observed or photographed against a black background. The milk is injected into the water above the animal from a row of fine jets (Fig. I, A) connected to a syringe. The syringe is operated manually by means of a screwed ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1781076a0
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  • 16
    Electronic Resource
    Electronic Resource
    Relation between Breeding and Ecdysis in Cirripedes (1958)
    [s.l.] : Nature Publishing Group
    Nature 181 (1958), S. 1078-1079 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The Cirripedia are exceptional in being hermaphrodite and in having the egg masses lying free in the mantle cavity during incubation. As a result they do not necessarily lose them when they moult1. Crisp2 suggested that a moult might be expected to accompany copulation as it does in other ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1811078b0
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  • 17
    Electronic Resource
    Electronic Resource
    A Substance promoting Hatching and Liberation of Young in Cirripedes (1956)
    [s.l.] : Nature Publishing Group
    Nature 178 (1956), S. 263-263 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Egg masses are often retained for a considerable period after reaching their final stage in development2, and throughout this period they will hatch only if removed from the parental mantle cavity and broken up in sea water. Although the mantle cavity is in direct communication with the sea and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/178263a0
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  • 18
    Electronic Resource
    Electronic Resource
    Use of X-Ray Stereoscopy for examining Shipworm Infestation in vivo (1953)
    [s.l.] : Nature Publishing Group
    Nature 172 (1953), S. 408-409 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Prerequisites to the development of improved treatments are : (a) a knowledge of the habits of the larval Teredo, its method of entry and selection of points of attack ; (b) the growth and behaviour of the adult ; (c) a reliable method of assessing attack by Teredo on experimentally treated wood ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/172408b0
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  • 19
    Electronic Resource
    Electronic Resource
    Isolation of Intertidal Animals by Sea Barriers (1953)
    [s.l.] : Nature Publishing Group
    Nature 172 (1953), S. 208-209 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] It seems most improbable that any of these species could be excluded from Ireland on account of climatic or hydrographic factors. While all are relatively warm-water forms, they extend to parts of the British coast (St. George's Channel, and, in the case of Elminius, the North Sea) which are ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/172208a0
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  • 20
    Electronic Resource
    Electronic Resource
    Gregariousness in Barnacles in Relation to the Fouling of Ships and to Anti-Fouling Research (1953)
    [s.l.] : Nature Publishing Group
    Nature 171 (1953), S. 1109-1110 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] BECAUSE of their relevance to applied work, we feel it is desirable to direct attention to the results of investigations at this station on the setting behaviour of three species of barnacles, Balanus balanoides, Balanus crenatus and Elminius modestus, as observed in the laboratory. The last two ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1711109a0
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