Polymorphism for plate morphs in Gasterosteus aculeatus on the east coast of Canada and an hypothesis for their global distribution

1982 ◽  
Vol 60 (5) ◽  
pp. 1032-1042 ◽  
Author(s):  
D. W. Hagen ◽  
G. E. E. Moodie
Keyword(s):  
North America ◽  
New Brunswick ◽  
Prince Edward Island ◽  
Gasterosteus Aculeatus ◽  
East Coast ◽  
Threespine Stickleback ◽  
Global Distribution ◽  
High Frequencies ◽  
Virtual Absence ◽  
Associated Variable

In the threespine stickleback (Gasterosteus aculeatus) three plate morphs, controlled by major genes, are easily distinguished: the low-plated, partially plated, and completely plated morphs. We give the results of a geographic survey for these morphs, with 177 samples from New Brunswick, Prince Edward Island, and adjacent regions. The low-plated morph is virtually absent. Most sites are either monomorphic for the completely plated morph or polymorphic with high frequencies of that morph. Polymorphic sites are most frequent in fresh water where the frequency of partials is much higher. Polymorphic sites are also more than twice as frequent on Prince Edward Island than on the mainland. But sites with high frequencies of the partial morph, with one exception, occur only on the mainland. Populations with high frequencies of partials predominate in lakes and their tributaries near the sea. Hybridization between the low-plated leiurus and completely plated trachurus cannot account for most of the polymorphism in North America. The global distribution of plate morphs shows an association with climate, and the virtual absence of the low-plated morph in this survey can be accounted for by the action of climatic selection or an associated variable.

scholarly journals Limited Genetic Diversity in North American Isolates of Phytophthora erythroseptica Pathogenic to Potato Based on RAPD Analysis

Plant Disease ◽  
2005 ◽  
Vol 89 (4) ◽  
pp. 380-384 ◽  
Author(s):  
Rick D. Peters ◽  
Rod J. Clark ◽  
Albert D. Coffin ◽  
Antony V. Sturz ◽  
David H. Lambert ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
North America ◽  
New Brunswick ◽  
Prince Edward Island ◽  
Random Amplified Polymorphic Dna ◽  
Geographic Origin ◽  
The United States ◽  
Vitro Assay ◽  
Phytophthora Erythroseptica

Pink rot of potato (Solanum tuberosum), caused by Phytophthora erythroseptica, is found wherever potatoes are grown, and in the last decade, it has reemerged as an economically important disease in Canada and the United States. A selection of isolates of P. erythroseptica from major potato-growing regions in North America, namely Prince Edward Island and New Brunswick, Canada, and Maine and Idaho, U.S.A., was assessed for genetic diversity with randomly chosen decanucleotide primers which were used to amplify regions of DNA to reveal polymorphisms among templates (random amplified polymorphic DNA [RAPD]). The isolates varied in their geographic origin as well as in their sensitivity to mefenoxam, as determined by an in vitro assay. In three separate RAPD screens (I, II, and III) with 23 isolates of P. erythroseptica chosen from a larger collection, 1,410, 369, and 316 robust, scorable bands were amplified, respectively. However, among the bands amplified in screens I, II, and III, only 3, 1, and 3 bands, respectively, were polymorphic. When three primers yielding polymorphisms were used to screen 106 isolates from Prince Edward Island and New Brunswick, or a representative collection of 32 isolates from Prince Edward Island, New Brunswick, Maine, and Idaho, no major variation was discovered. RAPD markers were not correlated with geographic origin or mefenoxam sensitivity of the isolates. From an evolutionary standpoint, the absence of genetic diversity among the isolates of P. erythroseptica we examined may be attributable to the relatively recent introduction of a small founding population of the pathogen in North America.

Apiosporina morbosa. [Distribution map].

2002 ◽  
Author(s):  
Keyword(s):  
New York ◽  
North Carolina ◽  
South Carolina ◽  
North America ◽  
New Brunswick ◽  
South Dakota ◽  
Prince Edward Island ◽  
Distribution Map ◽  
Prunus Spp ◽  
New Distribution

Abstract A new distribution map is provided for Apiosporina morbosa (Schwein.) v. Arx Fungi: Ascomycota: Dothideales Hosts: Stone fruit (Prunus spp.). Information is given on the geographical distribution in NORTH AMERICA, Canada, Alberta, British Columbia, Manitoba, New Brunswick, Newfoundland, Northwest, Territories, Nova Scotia, Ontario, Prince Edward Island, Quebec, Saskatchewan, Mexico, USA, Alabama, California, Colorado, Connecticut, Delaware, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Kentucky, Maine, Maryland, Massachusetts, Michigan, Mississippi, Missouri, Montana, New Jersey, New York, North Carolina, North Dakota, Ohio, Oklahoma, Oregon, Pennsylvania, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin.

Clover phyllody phytoplasma. [Distribution map].

2009 ◽  
Author(s):  
Keyword(s):  
Czech Republic ◽  
North America ◽  
New Brunswick ◽  
White Clover ◽  
Trifolium Repens ◽  
Prince Edward Island ◽  
Distribution Map ◽  
Clover Phyllody ◽  
New Distribution ◽  
Distribution In Europe

Abstract A new distribution map is provided for Clover phyllody phytoplasma. Phytoplasma. Hosts: Polyphagous including poppy anemone (Anemone coronaria), strawberry (Fragaria spp.), buttercup (Ranunculus spp.), white clover (Trifolium repens) and zinnia (Zinnia elegans). Information is given on the geographical distribution in Europe (Belarus, Belgium, Bulgaria, Czech Republic, France, Germany, Hungary, Ireland, Italy (Mainland Italy), Lithuania, Portugal, Romania, Russia, Switzerland, UK), Asia (India (Himachal Pradesh), Japan), North America (Canada (New Brunswick, Nova Scotia, Prince Edward Island, Quebec), USA (Florida)), Oceania (Australia (Victoria)).

Diplocarpon mali. [Distribution map].

2011 ◽  
Author(s):  
Keyword(s):  
North America ◽  
New Brunswick ◽  
Geographical Distribution ◽  
Prince Edward Island ◽  
Uttar Pradesh ◽  
Distribution Map ◽  
Jammu And Kashmir ◽  
New Distribution ◽  
Distribution In Europe ◽  
Diplocarpon Mali

Abstract A new distribution map is provided for Diplocarpon mali Y. Harada & Sawamura. Ascomycota: Helotiales. Hosts: apple (Malus spp.) and flowering quince (Chaenomeles spp.). Information is given on the geographical distribution in Europe (Italy, Mainland Italy, Romania), Asia (China, Anhui, Gansu, Hebei, Heilongjiang, Henan, Hubei, Jiangsu, Jilin, Liaoning, Nei Menggu, Shaanxi, Shandong, Sichuan, Xinjiang, Yunnan, India, Himachal Pradesh, Jammu and Kashmir, Uttar Pradesh, Japan, Honshu, Kyushu, Korea Republic, Taiwan), North America (Canada, New Brunswick, Nova Scotia, Ontario, Prince Edward Island, USA, Wisconsin).

Tenebrionidae (Coleoptera) of the Maritime Provinces of Canada

2008 ◽  
Vol 140 (6) ◽  
pp. 690-713 ◽  
Author(s):  
Christopher G. Majka ◽  
Patrice Bouchard ◽  
Yves Bousquet
Keyword(s):  
Nova Scotia ◽  
North America ◽  
New Brunswick ◽  
Prince Edward Island ◽  
Forest Ecosystems ◽  
Trophic Group ◽  
Undescribed Species ◽  
Maritime Provinces ◽  
Underlying Causes ◽  
First Time

AbstractThe Tenebrionidae of the Maritime Provinces of Canada are surveyed. Forty-eight species have been reported from the region. Eleven of these species (ten Palearctic and one Nearctic) have been introduced to the region, five of which are apparently now extirpated. Dates of first detection of these species are provided for each province and North America. Thirteen species are newly recorded in New Brunswick, 25 in Nova Scotia, and 15 on Prince Edward Island, for a total of 53 new provincial records. Of these, 18 species including Bolitophagus corticola Say, Neatus tenebrioides (Palisot de Beauvois), Helops gracilis Bland, Blapstinus substriatus Champion, Hymenorus obesus Casey, Hymenorus picipennis Casey, Hymenorus pilosus (Melsheimer), Mycetochara bicolor (Couper), Mycetochara binotata (Say), Mycetochara fraterna (Say), Platydema excavatum (Say), Platydema teleops Triplehorn, Corticeus praetermissus (Fall), Alobates pennsylvanicus (DeGeer), Haplandrus fulvipes (Herbst), Xylopinus saperdioides (Olivier), an undescribed species of Paratenetus Spinola, and an undescribed species of Neatus LeConte are newly recorded for the Maritime Provinces as a whole. One of these, Helops gracilis, is recorded for the first time in Canada. The fauna is discussed from the perspective of the patterns of distribution of species in the region and their possible underlying causes. Island faunas are discussed, as is the saproxylic component of the fauna, with a brief consideration of the importance of this trophic group in the dynamics of forest ecosystems in the region.

scholarly journals The Biology of Canadian Weeds. 153. Stachys palustris L.

2014 ◽  
Vol 94 (4) ◽  
pp. 709-722
Author(s):  
Stephen J. Darbyshire ◽  
Ardath Francis ◽  
Gerald A. Mulligan ◽  
Gavin L. Graham
Keyword(s):  
North America ◽  
New Brunswick ◽  
Prince Edward Island ◽  
Species Complex ◽  
Eastern North America ◽  
Agricultural Systems ◽  
Wetland Plant ◽  
Root Crops ◽  
Arable Fields

Darbyshire, S. J., Francis, A., Mulligan, G. A. and Graham, G. 2014. The Biology of Canadian Weeds. 153. Stachys palustris L. Can. J. Plant Sci. 94: 709–722. Marsh hedge-nettle, Stachys palustris, is a perennial Eurasian member of the mint family, which has become naturalized and weedy in some parts of eastern North America. It is a hexaploid member of a holarctic species complex, which differs morphologically from the primarily tetraploid North American forms. The production of fleshy tuberous rhizomes is the most significant distinctive feature. In Canada, it has been a weed of potato and root crops in Nova Scotia, New Brunswick and Prince Edward Island, although other crops and areas, such as soybean in Ontario, are also affected. Usually considered a wetland plant, it readily spreads into drier arable fields from adjacent ditches and wetlands. Several herbicides available for use in Canada have been found to provide limited long-term suppression in agricultural systems, with the best results obtained using combined pre-emergent and post-emergent applications.

Meristic variation in the threespine stickleback, Gasterosteus aculeatus L., in eastern Canadian waters

1973 ◽  
Vol 51 (5) ◽  
pp. 547-551 ◽  
Author(s):  
E. T. Garside ◽  
T. Hamor
Keyword(s):  
Nova Scotia ◽  
North America ◽  
Species Complex ◽  
Vertebral Column ◽  
Gasterosteus Aculeatus ◽  
Lake Ontario ◽  
Threespine Stickleback ◽  
Meristic Variation ◽  
La Madeleine ◽  
Lateral Plates

Samples of threespine stickleback, Gasterosteus aculeatus L., collected from several areas of Newfoundland and Nova Scotia, and single sites from Iles de la Madeleine, Quebec, and eastern Lake Ontario, were analyzed for variation in numbers of anterior lateral plates and vertebrae. Counts of vertebrae varied from 28 to 35 and mean counts from 30.3 to 33.4, without being related to any obvious geographic gradients. Trunk and caudal segments of the vertebral column had about the same degree of variation. Counts of lateral plates exclusive of ossicles of the caudal keel ranged from 0 to 31 with a range of means from 1.6 to 24.7. Incomplete development of potential plate number and absence of caudal keels were observed in 1st-year individuals. These results are discussed in relation to information about this species complex from populations of Pacific North America and Europe.

Didymascella thujina. [Descriptions of Fungi and Bacteria].

1997 ◽  
Author(s):  
D. W. Minter
Keyword(s):  
North America ◽  
New Brunswick ◽  
Geographical Distribution ◽  
Prince Edward Island ◽  
Western North America ◽  
Planted Forests ◽  
Thuja Occidentalis ◽  
Introduced Plants ◽  
Resistant Varieties ◽  
Natural Stands

Abstract A description is provided for Didymascella thujina. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: 'Keithia disease' or 'cedar leaf blight'. HOSTS: Leaves of Thuja occidentalis, T. plicata. Occurring on T. plicata throughout its range in western North America, and widespread in North America on T. occidentalis, apparently confined to these two hosts, fide Pawsey (1958). GEOGRAPHICAL DISTRIBUTION: Austria, Belgium, Canada (Alberta, British Columbia, New Brunswick, Northwest Territories, Ontario, Prince Edward Island, Quebec), Denmark, Eire, Netherlands, Norway, UK (England, Scotland, Wales), USA (Alaska, Idaho, Oregon, Vermont, Washington, Wisconsin). Unsuccessful searches on introduced plants in Chile and Ukraine. With the introduction of resistant varieties of its host, this fungus is becoming less common in planted forests and on hedge trees, though it is still generally abundant in natural stands of its hosts. TRANSMISSION: By air-borne ascospores in humid conditions.

Records of adventive aleocharine beetles (Coleoptera: Staphylinidae: Aleocharinae) found in Canada

2007 ◽  
Vol 139 (1) ◽  
pp. 54-79 ◽  
Author(s):  
Jan Klimaszewski ◽  
Volker Assing ◽  
Christopher G. Majka ◽  
Georges Pelletier ◽  
Reginald P. Webster ◽  
...  
Keyword(s):  
United States ◽  
British Columbia ◽  
Nova Scotia ◽  
North America ◽  
New Brunswick ◽  
Prince Edward Island ◽  
Anthropogenic Activities ◽  
Palaearctic Region ◽  
First Time

AbstractEight additional adventive aleocharine beetles, native to the Palaearctic region, are reported from Canada, five of them for the first time. They belong to three tribes: Crataraea suturalis (Mannerheim) (Nova Scotia, Saskatchewan, British Columbia) and “Meotica pallens (Redtenbacher)” (Ontario, British Columbia) belong to Oxypodini; Atheta (Chaetida) longicornis (Gravenhorst) (Nova Scotia, Quebec), Atheta (Thinobaena) vestita (Gravenhorst) (New Brunswick), Dalotia coriaria (Kraatz) (Alberta), Dinaraea angustula (Gyllenhal) (Nova Scotia, Prince Edward Island, Quebec, Alberta), and Nehemitropia lividipennis (Mannerheim) (New Brunswick, Nova Scotia, Prince Edward Island, Quebec, Ontario) belong to Athetini; and Homalota plana (Gyllenhal) (Nova Scotia, New Brunswick) belongs to Homalotini. These species have likely been introduced into Canada from Europe by various anthropogenic activities, and their bionomics and possible modes of introduction are discussed. For each species, a short diagnosis and habitus and genital images are provided to assist with identification. The habitus and genital images are presented here for the first time for these species in North America. New United States records are not included in the abstract.

Kabatiella caulivora. [Distribution map].

1991 ◽  
Author(s):  
Keyword(s):  
New Zealand ◽  
North America ◽  
New Brunswick ◽  
Prince Edward Island ◽  
New South ◽  
South Australia ◽  
Distribution Map ◽  
South Wales ◽  
Kabatiella Caulivora ◽  
New Distribution

Abstract A new distribution map is provided for Kabatiella caulivora (Kirchner) Karak. Hosts: Clover (Trifolium). Information is given on the geographical distribution in Africa, Morocco, Asia, Iran, Japan, USSR, Armenia, Australasia, Australia, New South Wales, South Australia, Western Australia, Victoria, New Zealand, Europe, Belgium, Czechoslovakia, Denmark, Finland, France, Germany, Hungary, Italy, Netherlands, Norway, Poland, Portugal, Republic of Ireland, Romania, Switzerland, UK, USSR, Byelorussia, Sverdlovsk, Estonia, Latvia, Lithuania, Yugoslavia, North America, Canada, Alberta, Ontario, Prince Edward Island, Quebec, Saskatchewan, New Brunswick, Nova Scotia, Newfoundland, USA.

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