Interannual variation in spawning success of striped bass ( Morone saxatilis ) in the Saint John River, New Brunswick

2019 ◽  
Vol 36 (1) ◽  
pp. 13-24 ◽  
Author(s):  
Samuel N. Andrews ◽  
Tommi Linnansaari ◽  
Nathalie Leblanc ◽  
Scott A. Pavey ◽  
R. Allen Curry
Keyword(s):  
New Brunswick ◽  
Striped Bass ◽  
Interannual Variation ◽  
Morone Saxatilis ◽  
Saint John ◽  
Spawning Success

scholarly journals Movements of juvenile and sub-adult striped bass Morone saxatilis in the Saint John River, New Brunswick, Canada

2020 ◽  
Vol 43 ◽  
pp. 281-289
Author(s):  
SN Andrews ◽  
T Linnansaari ◽  
NM Leblanc ◽  
SA Pavey ◽  
RA Curry
Keyword(s):  
New Brunswick ◽  
Striped Bass ◽  
Morone Saxatilis ◽  
Genetic Ancestry ◽  
Successful Recruitment ◽  
Saint John ◽  
Source Populations ◽  
Summer Feeding

Juvenile striped bass (age-1) of distinct genetic ancestry were re-discovered in the Saint John River, New Brunswick in 2014 after a 35 yr hiatus of recognition. These juveniles were determined to be highly genetically divergent from all possible source populations, hypothesized to be of Saint John River ancestry, and thus considered evidence of the continued existence of the native stock. Successful recruitment of strong year classes of striped bass within the Saint John River, however, appears to be infrequent. We acoustically tagged and tracked juvenile and sub-adult striped bass (n = 37; age 2-4) in the Saint John River in both 2015 and 2016, and identified summer feeding and overwintering habitats that established an in-river residency. Following decades of poor or no recruitment of the native striped bass stock, it is now imperative that managers quickly include monitoring of juvenile and sub-adult striped bass and protection of their habitats in the conservation and recovery efforts for Saint John River striped bass.

Winter ecology of striped bass (Morone saxatilis) near its northern limit of distribution in the Saint John River, New Brunswick

2020 ◽  
Vol 103 (11) ◽  
pp. 1343-1358 ◽  
Author(s):  
S. N. Andrews ◽  
T. Linnansaari ◽  
R. A. Curry ◽  
N. M. Leblanc ◽  
S. A. Pavey
Keyword(s):  
New Brunswick ◽  
Striped Bass ◽  
Morone Saxatilis ◽  
Winter Ecology ◽  
Northern Limit ◽  
Saint John

The Misunderstood Striped Bass of the Saint John River, New Brunswick: Past, Present, and Future

2017 ◽  
Vol 37 (1) ◽  
pp. 235-254 ◽  
Author(s):  
S. N. Andrews ◽  
T. Linnansaari ◽  
R. A. Curry ◽  
M. J. Dadswell
Keyword(s):  
New Brunswick ◽  
Striped Bass ◽  
Saint John

Evidence of a Genetically Distinct Population of Striped Bass within the Saint John River, New Brunswick, Canada

2018 ◽  
Vol 38 (6) ◽  
pp. 1339-1349 ◽  
Author(s):  
Nathalie M. Leblanc ◽  
Samuel N. Andrews ◽  
Trevor S. Avery ◽  
Gregory N. Puncher ◽  
Benjamin I. Gahagan ◽  
...  
Keyword(s):  
New Brunswick ◽  
Striped Bass ◽  
Distinct Population ◽  
Saint John

The History of Striped Bass (Morone saxatilis) Conservation and Management in Kouchibouguac National Park, New Brunswick, Canada

2020 ◽  
Vol 27 (4) ◽  
Author(s):  
Samuel N. Andrews ◽  
David M. Mazerolle ◽  
Firmin Leblanc ◽  
Tommi Linnansaari ◽  
R. Allen Curry
Keyword(s):  
New Brunswick ◽  
Striped Bass ◽  
National Park ◽  
Morone Saxatilis ◽  
History Of ◽  
Conservation And Management

Emamectin benzoate is a safe and effective anthelmintic against coelomic nematode Philometra rubra in striped bass Morone saxatilis

2020 ◽  
Vol 142 ◽  
pp. 47-53
Author(s):  
K Béland ◽  
G Séguin ◽  
S Lair
Keyword(s):  
Mortality Rate ◽  
Striped Bass ◽  
High Mortality ◽  
Morone Saxatilis ◽  
Treatment Results ◽  
Emamectin Benzoate ◽  
Once Daily ◽  
Fish Hatchery ◽  
Parasitic Burden

An unusually high mortality rate due to verminous (Philometra rubra) coelomitis was documented in wild-hatched striped bass Morone saxatilis raised in a fish hatchery as part of a stock restoration program. To decrease the parasitic burden and therefore potentially minimize mortality, the effectiveness of 2 different anthelmintics was evaluated. Two trials were conducted on wild-collected fingerlings naturally infected by P. rubra. In 2006, 144 yearling fish were randomly assigned to 4 experimental groups: (1) levamisole (Levasol®) at 2 mg l-1 via immersion for 8 h once weekly for 3 wk; (2) levamisole at a dose of 2.5 mg kg-1 biomass via feed once daily for 7 d; (3) emamectin benzoate (Slice®) at a dose of 0.05 mg kg-1 biomass via feed once daily for 7 d; and (4) control. Emamectin successfully eliminated live nematodes in 84.9% of the fish, whereas the administration of levamisole, either via immersion or feed, was not successful in significantly reducing the number of live P. rubra. In 2007, the administration of the same dosage of emamectin to approximately 1000 naturally infected yearling striped bass was associated with a 100% mortality rate of P. rubra in the 30 fish randomly examined 5 wk after the beginning of the treatment. Results of these trials indicate that, at the dosage used, the administration of emamectin at the end of the summer is safe for striped bass yearlings and considerably reduces the prevalence and intensity of the infection by this parasite.

Feeding ecology of early life stages of striped bass (Morone saxatilis) along an estuarine salinity-turbidity gradient, St. Lawrence Estuary, Canada

2019 ◽  
Vol 41 (4) ◽  
pp. 507-520 ◽  
Author(s):  
L Vanalderweireldt ◽  
P Sirois ◽  
M Mingelbier ◽  
G Winkler
Keyword(s):  
Striped Bass ◽  
Feeding Ecology ◽  
Early Life ◽  
Morone Saxatilis ◽  
Early Summer ◽  
Gut Contents ◽  
Life Stages ◽  
Early Life Stages ◽  
Lawrence Estuary ◽  
Feeding Niche

Abstract After being extirpated from the St. Lawrence River in the 1960s, striped bass (Morone saxatilis) were reintroduced to the estuary in 2002 and by 2008, they were naturally reproducing. To document the habitat use and feeding ecology of this reintroduced population, we examined the gut contents of 333 larvae and juveniles. Samples were collected in four estuarine habitats in 2014: the upstream freshwater section (UP), the oligohaline (O-ETM) and the mesohaline (M-ETM) estuarine turbidity maximum zones, and the downstream polyhaline section (DOWN). In June, pelagic larvae developed in the UP and the O-ETM, feeding mainly on copepods such as Eurytemora affinis. The O-ETM exhibited better suitable feeding conditions compared to the UP, likely due to the presence of Bosmina sp. as a primary prey. After July, striped bass shifted to larger prey items, consuming mainly dipteran pupa in upstream littoral habitats and gammarids and mysids in downstream habitats. In the early summer, the UP provided a high-quality nursery habitat and as the season progressed, the smallest juveniles dispersed downstream and improved their feeding success by exploiting a new feeding niche. This observation suggests that being distributed throughout the estuary may increase the potential survival of striped bass early life stages.

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