scholarly journals Non-indigenous tunicate species in the Bay of Fundy, eastern Canada

2008 ◽  
Vol 65 (5) ◽  
pp. 770-774 ◽  
Author(s):  
Murielle M. LeGresley ◽  
Jennifer L. Martin ◽  
Paul McCurdy ◽  
Bruce Thorpe ◽  
Blythe D. Chang
Keyword(s):  
New England ◽  
Ciona Intestinalis ◽  
Bay Of Fundy ◽  
Botryllus Schlosseri ◽  
Eastern Canada ◽  
Lime Kiln ◽  
Botrylloides Violaceus ◽  
The Us ◽  
South Shore ◽  
Heavy Infestation

Abstract LeGresley, M. M., Martin, J. L., McCurdy, P., Thorpe, B., and Chang, B. D. 2008. Non-indigenous tunicate species in the Bay of Fundy, eastern Canada. – ICES Journal of Marine Science, 65: 770–774. The frequency of fouling tunicates is increasing in Atlantic Canada and along the New England coast of the US. Canadian shellfish industries in the Gulf of St Lawrence and along the south shore of Nova Scotia have been affected by the heavy infestation of fouling tunicates. Because little research on tunicates has been conducted in the Bay of Fundy, a Canadian monitoring programme was established to look for the non-indigenous tunicates Ciona intestinalis, Botryllus schlosseri, Didemnum sp. A, Botrylloides violaceus, and Styela clava, in southwest New Brunswick. Collectors were deployed at 11 stations in May/June 2006. Some were retrieved in August 2006; others remained until November of the same year. Ciona intestinalis had established at three survey sites, St Andrews Harbour, St Andrews Biological Station, and Fairhaven, Deer Island, but the heaviest infestation was in the Lime Kiln Bay–Charlie Cove area. The greatest settlement of B. schlosseri was at the Dipper Harbour site, with minimal settlements in St Andrews Harbour and Harbour de Loutre. The other species of interest were not detected during the survey.

scholarly journals The marine macroalgae of Brier Island, Nova Scotia, Canada

2019 ◽  
Vol 50 (1) ◽  
pp. 61
Author(s):  
David J. Garbary ◽  
Carolyn J. Bird ◽  
Beverly Hymes ◽  
Herb Vandermeulen
Keyword(s):  
Nova Scotia ◽  
New England ◽  
Native Species ◽  
New Records ◽  
Marine Macroalgae ◽  
Limited Area ◽  
Bay Of Fundy ◽  
Rocky Shores ◽  
Eastern Canada ◽  
Colpomenia Peregrina

From May to October 2017 seaweeds were identified in the field and laboratory from 20 sites around Brier Island, Nova Scotia. While most sites were intertidal rocky shores, there were one small salt marsh and one eelgrass bed included in the study, and some subtidal sampling was conducted utilizing SCUBA and snorkeling. The Brier Island seaweeds comprised 152 species and varieties of which 62 were Rhodophyta, 44 were Chlorophyta, 44 were Phaeophyceae, and two species were Xanthophyceae. Three species were new records for eastern Canada: Colaconema bonne- maisoniae, C. endophyticum, and Elachista stellaris, all were pre- viously recorded from New England. The flora included eight non- native species of which Colpomenia peregrina and Bonnemaisonia hami- fera (both gametophytic and tetrasporophytic stages) were abundant at two or more sites, and the invasive Codium fragile subsp. fragile was recorded based on a single drift specimen. With 150 species and varieties of seaweeds, Brier Island has the highest species richness of a limited area of eastern Canada. The Cheney floristic index at 2.4 is higher than comparable areas, and suggests that many additional brown algae remain to be found.Keywords: Chlorophyta, Colaconema, Bay of Fundy, Brier Island, Phaeophyceae, Rhodophyta, seaweeds

The Development and Growth of Ciona

1947 ◽  
Vol 26 (4) ◽  
pp. 616-625 ◽  
Author(s):  
N. J. Berrill
Keyword(s):  
Nervous System ◽  
Digestive System ◽  
Ciona Intestinalis ◽  
Growth Cycle ◽  
General Interest ◽  
Botryllus Schlosseri ◽  
Developmental Studies ◽  
Larval Stages ◽  
Artificial Fertilization ◽  
Sexually Mature

Ciona intestinalis (L.) is probably the most cosmopolitan species of ascidians and has long been of general interest. The adult morphology has been well described in monographic form by Roule (1884), the physiology of the heart and circulation by Heine (1902), Enriques (1904) and Wolf (1932), of the nervous system by Magnus (1902), Hecht (1918, 1926), Cate (1928), Haffner (1933), and Bacq & Florkin (1935), and of the digestive system by Yonge (1925). Developmental studies include that of the early embryology by Conklin (1905), problems of fertilization by Morgan (1945) and Damas (1899,1900). In no work, however, has there been a presentation of the entire Ciona organism from the tadpole stage through the critical post-larval stages to the young cionid ascidian. The present account portrays this period of development, together with a discussion of some significant but relatively obscure aspects of adult structure.Eggs and theRearing ofCiona intestinalisWhile ascidians in general are difficult to rear to maturity under laboratory conditions, Ciona is relatively easy, and together with Botryllus schlosseri (Pallas) and Diplosoma gelatinosum (M.-Edw.) is liable to appear more or less spontaneously in large aquaria into which tadpoles may have been brought. Artificial fertilization is readily accomplished, and at almost any time of the year, since Ciona is sexually mature above a certain size and reproduction is seasonal only to the extent of the rhythm of the growth cycle. Normally eggs are set free spontaneously at dawn, although individuals kept in the laboratory may accumulate eggs and the oviduct become swollen.

Marine tube-dwelling diatoms of eastern Canada: descriptions, checklist, and illustrated key

1984 ◽  
Vol 62 (4) ◽  
pp. 778-794 ◽  
Author(s):  
Christopher S. Lobban
Keyword(s):  
New Species ◽  
Northwest Territories ◽  
Common Species ◽  
Bay Of Fundy ◽  
Eastern Canada ◽  
Lawrence Estuary ◽  
The Common ◽  
Living Material ◽  
St Lawrence Estuary ◽  
A New Species

From a study of living materials and specimens in several regional herbaria, a list has been drawn up of all the common and several of the rarer tube-dwelling diatoms of eastern Canada. Descriptions, illustrations of living material and acid-cleaned valves, and a key to the species are provided. Most specimens were from the Atlantic Provinces and the St. Lawrence estuary, but a few were from the Northwest Territories. By far the most common species is Berkeleya rutilans. Other species occurring commonly in the Quoddy Region of the Bay of Fundy, and sporadically in space and time elsewhere, arc Navicula delognei (two forms), Nav. pseudocomoides, Nav. smithii, Haslea crucigera, and a new species, Nav.rusticensis. Navicula ramosissima and Nav. mollis in eastern Canada are usually found as scattered cohabitants in tubes of other species. Nitzschia tubicola and Nz. fontifuga also occur sporadically as cohabitants.

Transborder interactions in the sawmill industry of Chaudière-Appalaches, Québec: A survey analysis

2003 ◽  
Vol 79 (5) ◽  
pp. 936-947
Author(s):  
Debra Straussfogel ◽  
Theodore Howard ◽  
Sylvain Masse ◽  
Difei Zhang
Keyword(s):  
New England ◽  
Management Strategies ◽  
Mail Survey ◽  
Raw Material ◽  
Business Success ◽  
Survey Analysis ◽  
The Us ◽  
Sawmill Industry ◽  
Northern New England ◽  
National Boundaries

The objectives of this mail survey of sawmills in the Chaudière-Appalaches region of southern Québec were (1) to establish the level of transborder interaction of these sawmills, with regard to wood sources and final markets; (2) to discover their perceptions of local versus international economic and business factors with regard to their business success; and (3) to examine the role and importance of the size of the sawmills in Chaudière-Appalaches relative to the nature of their engagement in either raw material import from or finished product export to the US. Our results demonstrate that a transborder forest economy exists and that the conception of "local" in transboundary regions must be flexible enough to permit resource management strategies, that, to some extent, ignore national boundaries. Key words: sawmill industry, transborder interaction, Chaudière-Appalaches, Québec, Northern New England

scholarly journals Plans d’eau glaciaires et isostasie dans les bassins de la haute Ware et de la rivière Otter, Massachusetts (2e partie)

2005 ◽  
Vol 17 (41) ◽  
pp. 251-264
Author(s):  
Gilbert Cestre
Keyword(s):  
New England ◽  
Eastern Canada ◽  
Low Area ◽  
Proglacial Lakes ◽  
Close Relationship ◽  
Long Time ◽  
History Of ◽  
Connecticut Valley ◽  
The City ◽  
Detailed Work

The present study is one of the unpublished research projects which are known to have been conducted in New England and in Eastern Canada under the guidance of the late Richard J. LOUGEE, long-time professor of Geomorphology at Clark University. Over a number of years, this writer has worked in close relationship with Lougee and much evidence in the field was studied together. It is believed that here has been recorded a most detailed work of surveying, and this undoubtedly accounts for the somewhat exceptional results that will be presented. The area selected for this study (about 80% of it is woodland) is located in the highlands of Central Massachusetts in Worcester County, about twenty miles (32 kilo-meters) northwest of the city of Worcester. It consists of the valley of the Otter River draining north, and of a small portion of the East Branch of the Ware River draining south. Since completion of this study, parts of the low area which held the ancient glacial lakes have been flooded to become water reservoirs. That proglacial lakes, though temporary they may have been, once submerged much of the area under study, is shown by an abundance of deltas, kames, eskers and deltaic kames terraces. It is believed that all of these were built under water in such lakes. Other features, such as kettle-holes and glacial outlets, especially ice-marginal channels cut diagonally down the slope, have also been studied. By plotting on a profile of the most characteristic elevations (often carefully surveyed), it is possible to find the water planes of ancient proglacial lakes. To this must be added experiments conducted in a sedimentation tank as also measurements of both the imbrication of cobbles in eskers and the « smoothness indexes » of such stones and pebbles, using A. Cailleux' methods. Thus were obtained results which tend to show that : 1- the area under study probably was in a deep interlobate space created between the Connecticut Valley lobe to the west and the Boston Basin lobe to the east ; 2— ice-marginal channels are an indication of the existence of a thick, fast-retreating ice border ; 3- an isostatic balance restored itself by sometimes quick and strong adjustments of the crust of the earth ; 4— an early upwarping, made up of various zones of tilting articulated on hinge lines, has been referred to as Hubbard Uplift and is the earliest known in the post-Glacial history of New England.

scholarly journals New records and AMS radiocarbon dates on Quaternary Walrus ( Odobenus Rosmarus ) from New Brunswick

2002 ◽  
Vol 51 (1) ◽  
pp. 107-111 ◽  
Author(s):  
Randall F. Miller
Keyword(s):  
New Brunswick ◽  
New Records ◽  
Temporal Distribution ◽  
Late Glacial ◽  
Bay Of Fundy ◽  
Eastern Canada ◽  
Radiocarbon Dates ◽  
Odobenus Rosmarus ◽  
Sand And Gravel ◽  
Past Summer

Abstract Walrus fossils are occasionally recovered during scallop dragging in the Bay of Fundy and from sand and gravel deposits along the coastline of New Brunswick in eastern Canada. Six new fossils and four new AMS radiocarbon dates significantly increase the information concerning late-glacial to postglacial walrus in New Brunswick. Dates range from about 12 800 BP to 2 900 BP, almost half falling between 9 000 and 10 000 BP. Temporal distribution of walrus, compared to estimates of past summer sea surface temperature, suggest that in the Bay of Fundy walrus occurred in waters ranging from 12 to 15° C.

The Turkey Vulture in New England and Eastern Canada up to 1950

The Auk ◽  
1951 ◽  
Vol 68 (3) ◽  
pp. 315-333 ◽  
Author(s):  
Aaron M. Bagg
Keyword(s):  
New England ◽  
Eastern Canada ◽  
Turkey Vulture

THE VARIABILITY IN MANIFESTATIONS OF UNTREATED PATIENTS WITH PHENYLKETONURIA (PHENYLPYRUVIC ACIDURIA)

PEDIATRICS ◽  
1957 ◽  
Vol 20 (2) ◽  
pp. 290-302 ◽  
Author(s):  
Richmond S. Paine
Keyword(s):  
New England ◽  
Experimental Treatment ◽  
Hair Color ◽  
Eastern Canada ◽  
Number Of Patients ◽  
Objective Evidence ◽  
Comparable Control ◽  
Convulsive Seizures ◽  
Blue Eyes ◽  
Early Developmental

One hundred six cases of phenylketonuria have been surveyed in 11 institutions in New England and Eastern Canada. Data not previously available (and of some degree of uncertainty as to reliability) are presented as to the ages at which patients with phenylketonuria achieve the ability to sit unsupported, to walk independently, and to say recognizable words. A small number of patients achieve these steps at reasonably near the normal age and the degree of variability is such that early developmental timetables should not be overemphasized in interpreting possible effects of any treatment of the disease. Both eczema and seizures are proportionately more frequent in severely retarded patients with phenylketonuria than in those with lesser degrees of intellectual defect. If present at the time an experimental treatment is instituted, they would provide more objective evidence of possible benefit. Electroencephalograms were abnormal in 79% of patients for whom tracings were available and would provide one means of evaluating plans of treatment even in the absence of seizures. While the majority of these patients have blue eyes and blond hair, there is enough evidence to suggest a tendency to darkening of the hair with age that this also should be used with caution in evaluation of treatment. Frequencies of various neurologic manifestations are presented, including unusual hand posturing, tremor, hyperreflexia, clonus and spasticity. These are all variable enough that a reasonably positive diagnosis [See FIG. 2. in Source Pdf.] by physical examination is not possible, and further, they are not well adapted to evaluation of treatment. The distribution of intelligence quotients in patients with phenylketonuria appears to follow a continuous curve and to include a small number of persons with borderline normal or better intelligence. In assessing the effect of any treatment, it is unwarranted to ascribe to that treatment the attainment of borderline normal intellectual levels that may be reached by small numbers of patients, especially if originally tested in infancy or early childhood. The effect of any therapy can be adequately evaluated only by comparing changes in a number of treated patients with phenylketonuria, with changes in comparable control patients, selected on the basis of intelligence, age, physical accomplishments, and status with respect to hair color, eczema, convulsive seizures and electroencephalographic findings.

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