Paralytic shellfish toxins in zooplankton, mussels, lobsters and caged Atlantic salmon, Salmo salar, during a bloom of Alexandrium fundyense off Grand Manan Island, in the Bay of Fundy

Harmful Algae ◽  
2007 ◽  
Vol 6 (5) ◽  
pp. 745-758 ◽  
Author(s):  
D.H. Sephton ◽  
K. Haya ◽  
J.L. Martin ◽  
M.M. LeGresley ◽  
F.H. Page
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Bay Of Fundy ◽  
Alexandrium Fundyense ◽  
Shellfish Toxins ◽  
Atlantic Salmon Salmo Salar ◽  
Paralytic Shellfish Toxins ◽  
Paralytic Shellfish

Caligus elongatus (Copepoda: Caligoida) from Atlantic salmon (Salmo salar) cultured in marine waters of the Lower Bay of Fundy

1989 ◽  
Vol 67 (4) ◽  
pp. 1080-1082 ◽  
Author(s):  
W. E. Hogans ◽  
Deborah J. Trudeau
Keyword(s):  
Sex Ratio ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Gravid Female ◽  
Market Size ◽  
Bay Of Fundy ◽  
Marine Waters ◽  
Size Classes ◽  
Atlantic Salmon Salmo Salar ◽  
Passamaquoddy Bay

The occurrence of Caligus elongatus on Atlantic salmon (Salmo salar) cultured in marine waters in the Passamaquoddy Bay region of the lower Bay of Fundy is reported. Two size classes of cultured salmon (smolts and market size) were examined. Prevalence of C. elongatus was 54.5% on market fish and 54.7% on smolts. Intensities of infection for market fish and smolts were recorded as 2.41 and 2.58, respectively. Overall sex ratio of adult C. elongatus on infected salmon was 1:1.4 females to males; mean number of eggs per gravid female C. elongatus was 169.

Paralytic Shellfish Toxins in the Sea Scallop, Placopecten magellanicus, in the Bay of Fundy

1979 ◽  
Vol 36 (1) ◽  
pp. 32-36 ◽  
Author(s):  
C. P. Hsu ◽  
A. Marchand ◽  
Y. Shimizu ◽  
G. G. Sims
Keyword(s):  
Key Words ◽  
Bay Of Fundy ◽  
Placopecten Magellanicus ◽  
Toxic Dinoflagellate ◽  
Paralytic Shellfish Poison ◽  
Shellfish Toxins ◽  
Sea Scallop ◽  
Paralytic Shellfish Toxins ◽  
Paralytic Shellfish ◽  
A Minor

The paralytic shellfish poison of the giant sea scallop, Placopecten magellanicus (Gmelin), from the Bay of Fundy has been analyzed. Of eight toxins isolated, seven were identified with those previously recognized in various sources including the Atlantic toxic dinoflagellate, Gonyaulax tamarensis cells. The major components were gonyautoxin-I, gonyautoxin-II, and neosaxitoxin; saxitoxin was responsible for only a very small portion of the total toxicity. A minor toxin that was eluted between neosaxitoxin and saxitoxin in the chromatography system was found to be new and designated as gonyautoxin-VII. Key words: paralytic shellfish poisons, gonyautoxins, neosaxitoxin, Gonyaulax tamarensis

Distribution of Atlantic salmon (Salmo salar) postsmolts of different origins in the Bay of Fundy and Gulf of Maine and evaluation of factors affecting migration, growth, and survival

2005 ◽  
Vol 62 (6) ◽  
pp. 1363-1376 ◽  
Author(s):  
Gilles L Lacroix ◽  
Derek Knox
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Gulf Of Maine ◽  
Fish Larvae ◽  
Surface Current ◽  
Clupea Harengus ◽  
Bay Of Fundy ◽  
Growth And Survival ◽  
Atlantic Salmon Salmo Salar ◽  
Salmon Lice

Atlantic salmon (Salmo salar) postsmolts surveyed by surface trawling in the Bay of Fundy and Gulf of Maine during 2001–2003 were aggregated in several areas in the Bay of Fundy and dispersed over a broader area in the Gulf of Maine. Postsmolt distribution reflected the major surface-current vectors and was independent of origin (wild vs. hatchery, inner vs. outer Bay of Fundy). Migration proceeded without disruption, and marked wild postsmolts from both the inner and outer Bay of Fundy were recaptured in the outer Bay of Fundy and the Gulf of Maine, where their distribution overlapped the commercial fishery for Atlantic herring (Clupea harengus). Marked postsmolts of wild origin were recaptured more frequently than those of hatchery origin but the overall density was low, and no schools of postsmolts were encountered that could offer protection from predators. Temperature and salinity in postsmolt habitat were favourable for growth and survival. Postsmolts were in excellent condition and had no bacterial or viral pathogens or salmon lice (Lepeophtheirus salmonis). They were feeding on pelagic prey (amphipods, euphausiids, and fish larvae) and the period of accelerated marine growth had started, indicating that environmental conditions and food supply were not limiting growth and survival.

Mating structure of an endangered population of wild Atlantic salmon (Salmo salar) as determined using sibship reconstruction and a novel method of sex inference

2012 ◽  
Vol 69 (8) ◽  
pp. 1352-1361 ◽  
Author(s):  
Louise G. de Mestral ◽  
Christophe M. Herbinger ◽  
Patrick T. O’Reilly
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Mature Male ◽  
Bay Of Fundy ◽  
Multilocus Genotype ◽  
Group Level ◽  
Atlantic Salmon Salmo Salar ◽  
Genotype Information ◽  
Novel Method ◽  
Mature Male Parr

The recent development of molecular genetic markers and methods of inferring relatedness among individuals using multilocus genotype information has allowed new insight into mating systems in the wild. Capitalising on the recently discovered linkage between the microsatellite locus Ssa202 and the sex-determining region of the Atlantic salmon Y chromosome, we developed a novel method to infer the sex of unsampled, wild-spawning parents of some of the few remaining wild, inner Bay of Fundy Atlantic salmon ( Salmo salar ). We inferred that most of the unsampled, reconstructed parents at the half-sib group level were likely polygamous females, while the parents at the full-sib group level (nested within half-sib groups) were likely monogamous males. Given the very low numbers of anadromous salmon returning to inner Bay of Fundy rivers to spawn, the putative male parents were likely mature male parr rather than anadromous males. This suggests that salmonid populations experiencing extreme declines may be composed of a high proportion of related individuals from relatively few sib groups and that mature male parr may provide an important genetic and demographic buffer to population decline.

Food web incorporation of marine-derived nutrients after the reintroduction of endangered inner Bay of Fundy Atlantic salmon (Salmo salar)

2021 ◽  
Author(s):  
Grace Elizabeth Bryson ◽  
Karen A Kidd ◽  
Kurt M Samways
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Brook Trout ◽  
Freshwater Ecosystems ◽  
Bay Of Fundy ◽  
Δ13c And Δ15n ◽  
Salmon River ◽  
Atlantic Salmon Salmo Salar ◽  
Post Spawning ◽  
Marine Derived Nutrients

Inner Bay of Fundy Atlantic salmon (Salmo salar) are endangered anadromous fish that have the potential to provide marine-derived nutrients (MDNs) to freshwater ecosystems depending on their population abundance. Salmon have been reintroduced to the Upper Salmon River, but not the adjacent Point Wolfe River, in Fundy National Park, New Brunswick, Canada. This study determined whether stocking of adult salmon increased the productivity of the river. To examine the incorporation of MDNs, biofilm, leaf litter, Perlidae, Heptageniidae and brook trout (Salvelinus fontinalis) were sampled pre- and post-spawning in 2015-2017 from down- and up-stream of a natural barrier in both rivers and analyzed for carbon (δ13C) and nitrogen (δ15N) isotopes. After salmon spawning in each year, all organisms at the downstream site of the stocked river increased in δ13C and δ15N, with the greatest enrichment in brook trout (δ13C -23.97 to -21.10‰, δ15N +6.36 to +10.73‰). The proportion of MDNs in brook trout after salmon spawning (2015: 23.4%, 2016: 40.7%, 2017: 37.4%) also increased with higher numbers of released adult salmon. Results support the importance of salmon restoration for increasing the proportion of MDNs and productivity in rivers in Atlantic Canada.

Distribution and Timing of Tag Recoveries from Native and Nonnative Atlantic Salmon (Salmo salar) Released into Big Salmon River, New Brunswick

1976 ◽  
Vol 33 (4) ◽  
pp. 829-833 ◽  
Author(s):  
B. M. Jessop
Keyword(s):  
Atlantic Salmon ◽  
New Brunswick ◽  
Salmo Salar ◽  
Bay Of Fundy ◽  
Commercial Exploitation ◽  
Salmon River ◽  
Atlantic Salmon Salmo Salar ◽  
Saint John

Recaptures of tagged Atlantic salmon (Salmo salar) released as smolts into the Big Salmon River varied between annual releases with no differences found on the basis of native or nonnative origin. Few were recaptured outside the Bay of Fundy. Distant fisheries in Greenland and Newfoundland take few salmon from Big Salmon River and commercial exploitation within the Bay of Fundy is minor, particularly by the former large fishery off the mouth of the Saint John River.

Influence of origin on migration and survival of Atlantic salmon (Salmo salar) in the Bay of Fundy, Canada

2008 ◽  
Vol 65 (9) ◽  
pp. 2063-2079 ◽  
Author(s):  
Gilles L. Lacroix
Keyword(s):  
Overall Survival ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Survival Rates ◽  
Information Criterion ◽  
Passage Time ◽  
Survival Models ◽  
Bay Of Fundy ◽  
High Survival ◽  
Atlantic Salmon Salmo Salar

Atlantic salmon ( Salmo salar ) smolts of wild and hatchery origins (n = 522) were tagged with ultrasonic transmitters and monitored at successive arrays of submerged receivers during migration from five watersheds in three regions of the Bay of Fundy (BoF), Canada. Two of the regions had endangered inner BoF salmon populations. Migration success of postsmolts leaving the BoF varied widely among 13 groups monitored (3%−70%) and was influenced by behaviour and passage time. Region of origin was the key variable in habitat-specific survival models selected using the Akaike information criterion. Rearing origin, migration and release timing, and smolt size were important variables in some habitats. Estimated survival rates (overall and habitat specific) differed markedly among salmon populations of different regions. Mediocre estuarine survival of smolts (0.54) from the outer BoF region affected overall survival (0.66). Poor survival (0.21) in coastal areas of the distant inner BoF region and mediocre survival in other habitats resulted in low overall survival (0.06) that severely limited the potential for population recovery. Potential predators were abundant in habitats where survival was lowest. High survival of salmon from the intermediate inner BoF region in all habitats (0.81–0.93) was not responsible for their failure to return.

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