Habitat use by early life stages of the re-established striped bass and conspecific fish species along the St. Lawrence estuary

2020 ◽  
Vol 237 ◽  
pp. 106696
Author(s):  
L. Vanalderweireldt ◽  
G. Winkler ◽  
E.L. Forget-Lacoursière ◽  
M. Mingelbier ◽  
P. Sirois
Keyword(s):  
Habitat Use ◽  
Striped Bass ◽  
Fish Species ◽  
Early Life ◽  
Life Stages ◽  
Early Life Stages ◽  
Lawrence Estuary ◽  
St Lawrence Estuary

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.

scholarly journals Strong Effects of Temperature on the Early Life Stages of a Cold Stenothermal Fish Species, Brown Trout (Salmo trutta L.)

PLoS ONE ◽  
2016 ◽  
Vol 11 (5) ◽  
pp. e0155487 ◽  
Author(s):  
Emilie Réalis-Doyelle ◽  
Alain Pasquet ◽  
Daniel De Charleroy ◽  
Pascal Fontaine ◽  
Fabrice Teletchea
Keyword(s):  
Brown Trout ◽  
Fish Species ◽  
Early Life ◽  
Salmo Trutta ◽  
Life Stages ◽  
Early Life Stages ◽  
Brown Trout Salmo Trutta ◽  
Effects Of Temperature

The early life stages of an estuarine fish, the red drum (Sciaenops ocellatus), are tolerant to high pCO2

2017 ◽  
Vol 74 (4) ◽  
pp. 1042-1050 ◽  
Author(s):  
Joshua Lonthair ◽  
Rasmus Ern ◽  
Andrew J. Esbaugh
Keyword(s):  
Heart Rate ◽  
Fish Species ◽  
Early Life ◽  
Red Drum ◽  
Sciaenops Ocellatus ◽  
High Pco2 ◽  
Estuarine Fish ◽  
Life Stages ◽  
Early Life Stages ◽  
Estuarine Species

Ocean acidification (OA) and other climate change induced environmental alterations are resulting in unprecedented rates of environmental deterioration. This environmental change is generally thought to be too fast for adaptation using typical evolutionary processes, and thus sensitivity may be dependent on the presence of existing tolerant genotypes and species. Estuaries undergo natural pCO2 fluctuations over a variety of time scales, and levels regularly exceed the predicted end of the century values. Interestingly, estuarine fish species have been overlooked in reference to the impacts of OA. Here, we use the estuarine red drum (Sciaenops ocellatus) as a model to explore the hypothesis that early life stages of estuarine species have intrinsic tolerance to elevated pCO2. Our sensitivity endpoints included: survival, growth, yolk consumption, heart rate, and scototaxis. Survival was significantly decreased when exposed to 1300 μatm and 3000 μatm, and coincided with a significant increase in heart rate at the 3000 μatm exposure. However, these effects were less pronounced than the findings of previous studies on other marine fish species. Yolk depletion rate and standard length were not significantly affected by pCO2. Scototaxis behaviour was also not significantly affected by exposure to elevated levels of pCO2 under both acute and acclimated exposure scenarios. Overall, these results support the hypothesis that estuarine life history and habitat usage may play a critical role in determining sensitivity of fish species to OA. Furthermore, estuarine species may provide present-day insight into the physiological and ecological foundation of OA tolerance.

Toxicity of retene to early life stages of two freshwater fish species

1999 ◽  
Vol 18 (9) ◽  
pp. 2070-2077 ◽  
Author(s):  
Sonya M. Billiard ◽  
Kirsten Querbach ◽  
Peter V. Hodson
Keyword(s):  
Freshwater Fish ◽  
Fish Species ◽  
Early Life ◽  
Life Stages ◽  
Early Life Stages ◽  
Freshwater Fish Species
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