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.

scholarly journals Production of market-size European strain Atlantic salmon (Salmo salar) in land-based freshwater closed containment aquaculture systems

2021 ◽  
Vol 92 ◽  
pp. 102138
Author(s):  
Curtis Crouse ◽  
John Davidson ◽  
Travis May ◽  
Steven Summerfelt ◽  
Christopher Good
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Market Size ◽  
Atlantic Salmon Salmo Salar ◽  
European Strain

Imprinting and Homing of Atlantic Salmon (Salmo salar) Kelts

1989 ◽  
Vol 46 (4) ◽  
pp. 714-719 ◽  
Author(s):  
J. R. Foster ◽  
C. B. Schom
Keyword(s):  
Atlantic Salmon ◽  
New Brunswick ◽  
Salmo Salar ◽  
Release Site ◽  
Behavioral Changes ◽  
Salmon River ◽  
Delayed Release ◽  
Atlantic Salmon Salmo Salar ◽  
Seaward Migration ◽  
Passamaquoddy Bay

Experiments were conducted to determine if a process similar to imprinting occurs during each seaward migration of Atlantic Salmon (Salmo salar). Displaced Atlantic salmon kelts homed to the site from which they had previously emigrated to sea as smolts (Big Salmon River, New Brunswick, Canada) and did not home to their release sites, or their overwintering sites 150 km away. Delaying release of kelts past the time of normal seaward migration did not cause the behavioral changes associated with interference of the imprinting process described for smolts. Delayed release kelts did not remain near their seawater or estuarine release sites, home to their release sites, or non-selectively home to suitable spawning streams near their release sites. Delayed released kelts travelled away from the release site faster than kelts released during their normal time of seaward migration, but they did not return either to Passamaquoddy Bay or their natal stream in the calendar year of their release (the normal time for this stock) or in subsequent years.

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.

scholarly journals Effects of swimming speed and dissolved oxygen on geosmin depuration from market-size Atlantic salmon Salmo salar

2021 ◽  
pp. 102201
Author(s):  
John Davidson ◽  
Steven Summerfelt ◽  
Casey Grimm ◽  
Gregory Fischer ◽  
Christopher Good
Keyword(s):  
Atlantic Salmon ◽  
Dissolved Oxygen ◽  
Salmo Salar ◽  
Swimming Speed ◽  
Market Size ◽  
Atlantic Salmon Salmo Salar

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.

scholarly journals Systemic granuloma observed in Atlantic salmon Salmo salar raised to market size in a freshwater recirculation aquaculture system

2015 ◽  
Vol 47 (11) ◽  
pp. 3679-3683 ◽  
Author(s):  
Christopher Good ◽  
David P Marancik ◽  
Timothy J Welch ◽  
Travis May ◽  
John Davidson ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Market Size ◽  
Atlantic Salmon Salmo Salar ◽  
Aquaculture System ◽  
Recirculation Aquaculture System
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