Discrimination d'un stock de poisson, l'anguille (Anguilla rostrata), basée sur la présence d'un produit chimique de synthèse, le mirex

1985 ◽  
Vol 42 (3) ◽  
pp. 455-458 ◽  
Author(s):  
J.-D. Dutil ◽  
B. Légaré ◽  
C. Desjardins
Keyword(s):  
Lake Ontario ◽  
Distinct Advantage ◽  
Anguilla Rostrata ◽  
Commercial Fishery ◽  
Eastern Canada ◽  
Stock Discrimination ◽  
Chemical Products

Mirex concentrations were measured in eels (Anguilla rostrata) from eastern Canada to determine the contribution of Lake Ontario eels to the Saint Lawrence commercial fishery. Mirex could be detected in all eels (50 specimens) collected in Lake Ontario (0.18 ± 0.11 μg∙g−1). Most sedentary eels collected from the Saint Lawrence commercial fishery and both the migratory and sedentary eels collected from the Saint Lawrence tributaries and the Maritimes had no mirex. Of the migrating eels collected in the Saint Lawrence 74% contained mirex (0.17 ± 0.19 μg∙g−1). These results show that stocks can be discriminated on the basis of the presence of synthetic chemical products such as pesticides and other contaminants that are distributed heterogeneously in the environment. Based on a presence–absence criterion, this method for stock discrimination has the distinct advantage that it is more accurate and less time consuming than similar methods based on the presence of natural chemical products.

Distinction between American Eels (Anguilla rostrata) of Different Geographic Origins on the Basis of Their Organochlorine Contaminant Levels

1989 ◽  
Vol 46 (5) ◽  
pp. 836-843 ◽  
Author(s):  
Martin Castonguay ◽  
Jean-Denis Dutil ◽  
Claude Desjardins
Keyword(s):  
Lake Ontario ◽  
Anguilla Rostrata ◽  
Fish Tissues ◽  
Environmental Distribution ◽  
Stock Discrimination ◽  
Geographic Origins ◽  
Organochlorine Contaminants ◽  
Organochlorine Contaminant ◽  
American Eels ◽  
St Lawrence River

This study presents evidence that organochlorine contaminant levels of fish tissues represent a valuable tool for stock discrimination. Variability of concentrations of 15 organochlorine contaminants allowed a discrimination among American eels (Anguilla rostrata) of unknown (captured during the migration down the St. Lawrence River) or known geographic origins. The study also exemplifies that information regarding environmental distribution of contaminants can be gained by comparing organic contaminant levels among groups of fish. Indeed we can infer from this study that mirex contaminated sediments have extensively (at least 400 km) drifted downstream from Lake Ontario in less than 19 yr.

Dioxin-like contaminants are no longer a risk to the American eel (Anguilla rostrata) in Lake Ontario

2018 ◽  
Vol 37 (4) ◽  
pp. 1061-1070 ◽  
Author(s):  
Sharilyn J. Hoobin ◽  
Jonathan D. Byer ◽  
Mehran Alaee ◽  
R. Stephen Brown ◽  
Peter V. Hodson
Keyword(s):  
Lake Ontario ◽  
Anguilla Rostrata ◽  
American Eel

Temporal variations in embryotoxicity of Lake Ontario American eel ( Anguilla rostrata ) extracts to developing Fundulus heteroclitus

2016 ◽  
Vol 541 ◽  
pp. 765-775 ◽  
Author(s):  
Cyril Rigaud ◽  
Catherine M. Couillard ◽  
Jocelyne Pellerin ◽  
Benoît Légaré ◽  
Jonathan D. Byer ◽  
...  
Keyword(s):  
Fundulus Heteroclitus ◽  
Lake Ontario ◽  
Temporal Variations ◽  
Anguilla Rostrata ◽  
American Eel

A processing plant survey of external lesions of American eels (Anguilla rostrata) from Lake Ontario and the St. Lawrence River, Canada

1997 ◽  
Vol 31 (1-2) ◽  
pp. 19-32 ◽  
Author(s):  
Lucie T Dutil ◽  
Catherine M Couillard ◽  
Denise Bélanger
Keyword(s):  
Lake Ontario ◽  
Anguilla Rostrata ◽  
Processing Plant ◽  
American Eels ◽  
Plant Survey ◽  
St Lawrence River

Can the Atlantic Salmon Restoration Program Safely Re-Integrate Atlantic Salmon to Lake Ontario?

2018 ◽  
Author(s):  
Laura Gibson ◽  
Leia De Guzman ◽  
Michelle Lavery ◽  
Christine Ly ◽  
Kira MacDougall
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Chinook Salmon ◽  
Agonistic Behavior ◽  
Lake Ontario ◽  
Early Mortality ◽  
Eastern Canada ◽  
Early Mortality Syndrome ◽  
Salmon Population ◽  
The 19Th Century

Atlantic salmon (Salmo salar) are an economically valuable species and have inhabited the lakes and rivers of Eastern Canada since the last post-glacial period. However, since the end of the 19th century, Atlantic salmon populations have collapsed in Lake Ontario due to land clearance and dam and mill construction. In 2006, the Atlantic Salmon Reintroduction Program (ASRP) was established in Lake Ontario in an effort to recreate a self-sustaining salmon population. The ASRP aims to rebuild the Lake Ontario Atlantic salmon population by stocking fish from genetically diverse broodstock, restoring Atlantic salmon habitat and monitoring water quality. The ASRP also includes a public education component to emphasize the importance of maintaining the Atlantic salmon population. However, re- introduction programs like the ASRP can be challenged by interspecific competition. Chinook salmon are known to induce male agonistic behavior in Atlantic salmon. In addition, Atlantic salmon juveniles are out-competed by Rainbow trout. Furthermore, the prospective diet of Atlantic salmon in Lake Ontario is thiamin-deficient, which may lead to neurological, developmental and reproductive problems as well as Early Mortality Syndrome (EMS). We will conduct research in partnership with Bring Back the Salmon Lake Ontario, Atlantic Salmon Conservation Fund and the Atlantic Salmon Federation to investigate the potential threats to both Atlantic salmon and existing species that may result from the ASRP for Lake Ontario. Findings will be presented as well as recommendations for alterations to the program to ensure that the ASRP is a safe and successful endeavor.  

Plan for Implementing Environmental Effects Monitoring During Production-Related Oil Spills in Eastern Canada

2003 ◽  
Vol 2003 (1) ◽  
pp. 87-94
Author(s):  
Ken Trudel
Keyword(s):  
Environmental Effects ◽  
Oil Spills ◽  
Environmental Damage ◽  
Commercial Fishery ◽  
Eastern Canada ◽  
Marine Birds ◽  
Tiered System ◽  
The One ◽  
Fishery Species ◽  
Environmental Effects Monitoring

ABSTRACT This paper describes a three-tiered system for implementing spill-related environmental effects monitoring (EEM), in which the level of monitoring is linked to the type and size of spill and the magnitude of environmental damage. It describes the system using monitoring of marine birds and commercial fishery species to illustrate the application. Monitoring activities are divided into three tiers, each successive tier gathering more data and better data than the one before. Rationales for the tiers, as well as the criteria for escalating from one monitoring tier to the next are discussed.

Nearshore habitat associations of stocked American eel, Anguilla rostrata, in Lake Ontario and the upper St. Lawrence River

2015 ◽  
Vol 41 (3) ◽  
pp. 881-889
Author(s):  
Megan H.M. Lloyst ◽  
Thomas C. Pratt ◽  
Scott M. Reid ◽  
Michael G. Fox
Keyword(s):  
Lake Ontario ◽  
Habitat Associations ◽  
Anguilla Rostrata ◽  
American Eel ◽  
Nearshore Habitat ◽  
St Lawrence River

Eels at the Edge: Science, Status, and Conservation Concerns

2009 ◽  
Keyword(s):  
Curve Analysis ◽  
Anguilla Rostrata ◽  
Natural Mortality ◽  
Von Bertalanffy ◽  
Commercial Fishery ◽  
Disappearance Rate ◽  
Fishing Mortality ◽  
Catch Per Unit Effort ◽  
American Eels ◽  
Yield Per Recruit

<em>Abstract.—</em>American eels <em>Anguilla rostrata </em>were fourth in landings and third in value in the Delaware commercial finfish fisheries from 1999 to 2002. Landings and effort dropped while catch per unit effort (CPUE) varied during the period. Bait eel landings decreased more than food eel landings. The number of licensed eelers in Delaware dropped from 121 in 1997 to 77 in 2002. American eels collected from the commercial fishery ranged in length from 216 to 838 mm (mean 427 ± 133 SD), in weight from 13.6 to 820 g (mean 205 ± 205 SD), and in age from 2 to 12 years (mean 5 ± 2 SD). The length–weight relationship was <EM>W </EM>= 0.00000065 × <EM>L</EM><sup>3.18</sup>. Von Bertalanffy length-at-age parameters calculated from the sampled eels were <EM>L</EM> = 547, <em>k </em>= 0.43, and <em>t</em><sub>0</sub> = 0.38. Linearized catch curve analysis indicated an instantaneous disappearance rate of 0.59. The estimate of natural mortality (<EM>M</EM>) was 0.25, giving a fishing mortality (<EM>F</EM>) of 0.34. Yield-per-recruit analysis suggested that overfishing may be occurring in Delaware’s commercial American eel fishery.

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