Variation in the Incidence of Larval Nematodes in Atlantic Cod Fillets along the Southern Canadian Mainland

1957 ◽  
Vol 14 (6) ◽  
pp. 975-996 ◽  
Author(s):  
D. M. Scott ◽  
W. R. Martin
Keyword(s):  
Atlantic Cod ◽  
Halichoerus Grypus ◽  
Geographic Variations ◽  
Cape Breton Island ◽  
Cape Breton ◽  
Phoca Groenlandica ◽  
Seasonal Migrations ◽  
Size Groups ◽  
Geographic Differences ◽  
Nova Scotian

The incidence of larval nematodes, Porrocaecum decipiens, in fillets from three size-groups (scrod, market and steak) of Atlantic cod, Gadus callarias, has been analyzed. The analysis was based on about 73,000 fillets from cod caught between 1946 and 1956 in about 20 areas off the southern Canadian mainland.Geographic variation in the percentage of fillets infected was found in all size-groups of cod. For market cod the incidence ranged from a low of 6% on the offshore Nova Scotian Banks to a high of 35 to 91% in the southwestern Gulf of St. Lawrence. Intermediate values of 14% and 22% were observed respectively in the inshore fisheries of western Nova Scotia and Cape Breton Island. Similar patterns of geographic variation were present in scrod and steak cod. The main geographic differences in incidence were related to the distribution of the harbour seal (Phoca vitulina), the harp seal (Phoca groenlandica) and the gray seal (Halichoerus grypus).Incidences of infection and the number of nematodes per fillet usually varied directly with the size of the cod. The number of nematodes per pound of fillet was usually inversely related to the size of cod. It was concluded that cod could become infected throughout life and that the highest rate of infection occurred in small cod.Local variations, as distinct from broad geographic variations, were observed in the areas of Lockeport, of Cape Breton Island and of the southwestern Gulf of St. Lawrence. In these areas, the cod caught closest to shore were usually the most heavily infected.Seasonal variations in incidence occurred in the Cape Breton and Lockeport fisheries. The highest incidences occurred in the spring and fall in Cape Breton cod and in the summer in Lockeport cod. The variation in the Cape Breton fishery was attributed to seasonal migrations of the cod comprising the fishery. Increased use by fishermen of shallow inshore areas in the summer accounted for the higher summer incidences at Lockeport.Annual fluctuations in incidence were great in all areas. A trend of declining incidences was noted in the southwestern Gulf of St. Lawrence where the incidence dropped from 91% in 1946 to 35% in 1956. This decline was apparently related to extensive contemporary changes in the cod fishery in the Gulf of St. Lawrence.

scholarly journals Feeding by grey seals on endangered stocks of Atlantic cod and white hake

2014 ◽  
Vol 71 (6) ◽  
pp. 1332-1341 ◽  
Author(s):  
M.O. Hammill ◽  
G.B. Stenson ◽  
D.P. Swain ◽  
H.P. Benoît
Keyword(s):  
High Mortality ◽  
West Coast ◽  
Atlantic Cod ◽  
Stomach Contents ◽  
Natural Mortality ◽  
The West ◽  
Cape Breton Island ◽  
Cape Breton ◽  
The Mean ◽  
Overwintering Area

High natural mortality is preventing the recovery of collapsed stocks of Atlantic cod and white hake in the southern Gulf of St Lawrence, Canada. Predation by grey seals has been proposed as an important cause of this high mortality. We determined the contribution of cod and hake to the diet of grey seals collected along the west coast of Cape Breton Island and in the Cabot Strait, an area where overwintering cod aggregate. Along the coast of Cape Breton Island, the contribution of hake and cod to the diet was 30 and 17%, respectively, by weight using stomach contents and 13 and 9%, respectively, based on intestine contents. In the Cabot Strait, when overwintering aggregations of cod were present, cod accounted for 68% (range 57–80%) of the male diet from stomachs, and 46% (range: 31–64%) of the diet determined from intestines. Among females, cod represented 14% (range: 0–34%) and 9% (range: 3–54%) of the diet from stomachs and intestines, respectively. In Cabot Strait, white hake accounted for up to 17% of the diet by weight from stomachs, and up to 6% of the diet determined from intestines. The mean length of cod consumed by seals was 28 cm (SD = 8.6) along the coast of Cape Breton Island, and 39 cm (SD = 5.7) in Cabot Strait. The mean length of hake consumed by seals was 29 cm (SD = 7.0) along the coast of Cape Breton Island, and 35 cm (SD = 5.6) in Cabot Strait. Cod and hake are more important to the diet of males than that of females. The contribution of cod to the diet of grey seals foraging in the cod overwintering area is much greater than has been reported elsewhere.

Liminal Spaces and the Ecomorphic Self in Alistair MacLeod’s Nova Scotian Narratives

2021 ◽  
Vol 66 (1) ◽  
pp. 265-280
Author(s):  
Octavian More
Keyword(s):  
Short Stories ◽  
Close Reading ◽  
Cape Breton Island ◽  
The Road ◽  
Liminal Spaces ◽  
Cultural Milieu ◽  
Cape Breton ◽  
Nova Scotian

"Liminal Spaces and the Ecomorphic Self in Alistair MacLeod’s Short Stories. Starting from the observation that Cape Breton Island, the distinctive setting of Alistair MacLeod’s fiction, is a “borderland” lying at the intersection of complementary elements (past – present, tradition – individuality, humans – environment), this paper proposes a general discussion of liminality in the author’s work as well as a close reading of two of his short stories, “The Road to Rankin’s Point” and “Island”, with the aim of highlighting how a relational, ecomorphic self-arises in the wake of symbolic encounters that lead to a reassessment of the subject’s position within their biological and cultural milieu. Keywords: Alistair MacLeod, Cape Breton, liminality, borderlands, ecomorphism. "

Culinary tourism on Cape Breton Island

2019 ◽  
Vol 6 (2) ◽  
Author(s):  
Erna MacLeod
Keyword(s):  
Tourism Destination ◽  
Cape Breton Island ◽  
Culinary Tourism ◽  
Economic Significance ◽  
Cape Breton ◽  
Local Stakeholders ◽  
Resilient Communities ◽  
World Class ◽  
Ecological Relations ◽  
Developed World

Cape Breton Island is a well-known North American tourism destination with long-standing attractions such as the Cabot Trail and more recently developed world-class offerings such as the Cabot Links Golf Course. Tourism contributes significantly to Cape Breton’s economy, particularly since the mid-20th century as traditional resource-based industries have declined. In the 21st century, culinary tourism has become increasingly important to expand the island’s tourism offerings and to provide “authentic” tourism experiences. This study examines local-food tourism in Cape Breton to illuminate its cultural and economic significance. I conducted interviews with food producers, restaurateurs, government representatives, and tourism executives. I also consulted websites and policy documents and compared local stakeholders’ experiences and perspectives with official tourism strategies. Promoting culinary tourism raises questions of power, autonomy, inclusion, and accountability. My study accentuates possibilities for aligning economic and ecological goals to create resilient communities, foster equitable social and ecological relations, and establish Cape Breton as a culinary tourism destination.

Cape Breton ruby, a new Canadian gemstone discovery, Cape Breton Island, Nova Scotia

2007 ◽  
Vol 30 (5) ◽  
pp. 279-286 ◽  
Author(s):  
David J. Mossman ◽  
James D. Duivenvoorden ◽  
Fenton M. Isenor
Keyword(s):  
Nova Scotia ◽  
Cape Breton Island ◽  
Cape Breton

Seasonal and Geographic Variation in the Species Composition and Size of Prey Consumed by Grey Seals (Halichoerus grypus) on the Scotian Shelf

1993 ◽  
Vol 50 (8) ◽  
pp. 1768-1778 ◽  
Author(s):  
W. D. Bowen ◽  
J. W. Lawson ◽  
B. Beck
Keyword(s):  
Atlantic Cod ◽  
Halichoerus Grypus ◽  
Scotian Shelf ◽  
Sand Lance ◽  
Atlantic Mackerel ◽  
Relative Contribution ◽  
Wet Weight ◽  
The Mean ◽  
Silver Hake ◽  
Commercial Size

The grey seal (Halichoerus grypus) population on the Scotian Shelf has grown significantly over the past 20 yr, thus increasing the potential for competitive interactions between grey seals and fisheries. The relative contribution (percent wet weight) and size of prey eaten were estimated from otoliths and squid beaks recovered from 143 stomachs that contained food of the 528 collected from 1988 to 1990. Although 22 taxa were found, only four species (Atlantic herring, silver hake, Atlantic cod, and squid) accounted for 80% of the estimated weight of food eaten. The mean length of prey eaten ranged from 19 to 35 cm for six species. Only 17% of the cod and none of the pollock and squid eaten were of the length taken in commercial fisheries. However, about 80% of the silver hake and herring eaten were of commercial size. Offshore at Sable Island, northern sand lance, silver hake, and squid (in order of importance) accounted for 86.1% of the wet weight ingested by seals during summer; sand lance and cod accounted for 96.1% of prey eaten in winter. At inshore locations, herring, cod, and pollock made up 90% of the diet in summer; Atlantic mackerel, cod, squid, and herring made up 83% of the diet in winter.

scholarly journals Ar/Ar thermochronology of the Aspy and Bras d'Or terranes, Cape Breton Island, Nova Scotia

2018 ◽  
Author(s):  
D A Kellett ◽  
S M Barr ◽  
D van Rooyen ◽  
C E White
Keyword(s):  
Nova Scotia ◽  
Cape Breton Island ◽  
Cape Breton
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