Hypoxia and Sprint Swimming Performance of Juvenile Striped Bass, Morone saxatilis

2018 ◽  
Vol 91 (1) ◽  
pp. 682-690 ◽  
Author(s):  
Krista Kraskura ◽  
Jay A. Nelson
Keyword(s):  
Striped Bass ◽  
Swimming Performance ◽  
Morone Saxatilis ◽  
Sprint Swimming

Optimum Exercise Conditioning Velocity for Growth, Muscular Development, and Swimming Performance in Young-of-the-Year Striped Bass (Morone saxatilis)

1994 ◽  
Vol 51 (7) ◽  
pp. 1519-1527 ◽  
Author(s):  
Paciencia S. Young ◽  
Joseph J. Cech Jr.
Keyword(s):  
Striped Bass ◽  
White Muscle ◽  
Swimming Performance ◽  
Morone Saxatilis ◽  
Swimming Velocity ◽  
Natural Ecosystems ◽  
Cross Sectional ◽  
Muscular Development ◽  
Conditioning Period ◽  
Young Of The Year

Young-of-the-year striped bass (Morone saxatilis) were exercise conditioned for 60 d at four different water velocities: <0.02 (control), 0.5–1.2 (slow), 1.5–2.4 (moderate), and 2.4–3.6 body lengths∙s−1 (fast). Sampling for growth (body weight change), muscular development (red and white muscle cross-sectional areas), and swimming performance (critical swimming velocity) was done at 50 and 60 d of the exercise conditioning period and at 14, 28, 42, and 56 d post-conditioning. Optimum conditioning velocities for growth and swimming performance were the moderate and fast velocities, respectively, with both effects persisting 56 d post-conditioning. Fish exercised at the moderate and fast velocities showed significant increases in red muscle areas (at 0 and 14 d post-conditioning, respectively) and in white muscle areas (at 0–28 and 14–28 d post-conditioning, respectively). Exercise-conditioned fish at any velocity showed a significant increase in the red to white muscle ratio at the end of 60 d of conditioning. Our data suggest that exercise-conditioned young-of-the-year striped bass would have size and swimming advantages consistent with higher survival than unexercised fish when stocked in natural ecosystems.

Improved Growth, Swimming Performance, and Muscular Development in Exercise-Conditioned Young-of-the-Year Striped Bass (Morone saxatilis)

1993 ◽  
Vol 50 (4) ◽  
pp. 703-707 ◽  
Author(s):  
Paciencia S. Young ◽  
Joseph J. Cech Jr.
Keyword(s):  
Striped Bass ◽  
White Muscle ◽  
Swimming Performance ◽  
Survival Rates ◽  
Morone Saxatilis ◽  
Wild Fish ◽  
Cross Sectional ◽  
Cultured Fish ◽  
In The Wild ◽  
Young Of The Year

Exercise conditioning at 1.2–2.4 body lengths∙s−1 for 60 d significantly improved final weights, specific growth rates (SGR), 2-min critical swimming velocities, red muscle cross-sectional areas at 80% standard length (SL), and red:white muscle ratio at 80% SL in both cultured and wild young-of-the-year striped bass (Morone saxatilis). Moreover, wild fish had final weights and SGR greater than cultured fish in both exercised and unexercised groups. Exercise conditioning also increased white muscle cross-sectional areas at all sections (50, 65, and 80% SL) in the cultured but not in the wild fish, although white muscle areas of exercised wild fish were significantly greater than in the unexercised cultured fish. It is suggested that exercise-conditioned striped bass used for stocking purposes might show increased survival rates in the wild.

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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