Consistency of standard metabolic rate in relation to life history strategy of juvenile Atlantic salmon Salmo salar

2010 ◽  
Vol 156 (2) ◽  
pp. 278-284 ◽  
Author(s):  
Eila Seppänen ◽  
Jorma Piironen ◽  
Hannu Huuskonen
Keyword(s):  
Life History ◽  
Atlantic Salmon ◽  
Metabolic Rate ◽  
Salmo Salar ◽  
Life History Strategy ◽  
Standard Metabolic Rate ◽  
Atlantic Salmon Salmo Salar ◽  
Juvenile Atlantic Salmon

Effect of time of day, time of year, and life history strategy on time budgeting in juvenile Atlantic salmon, Salmo salar

1999 ◽  
Vol 56 (12) ◽  
pp. 2397-2403 ◽  
Author(s):  
Sveinn K Valdimarsson ◽  
Neil B Metcalfe
Keyword(s):  
Life History ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Life History Strategy ◽  
Time Of Day ◽  
Life History Strategies ◽  
Foraging Efficiency ◽  
Atlantic Salmon Salmo Salar ◽  
Juvenile Atlantic Salmon ◽  
Time Of Year

Traditionally, behavioural studies on juvenile Atlantic salmon, Salmo salar, have been conducted during the day in summer. It is known that Atlantic salmon become nocturnal in winter, but very little is known about their behaviour at that time. Therefore, observations in a seminatural stream were carried out during the day and night, from February to June, comparing diel and seasonal differences in behaviour between fish adopting alternative life history strategies. The results showed a general trend for more activity in spring than in winter, and the fish were found to be foraging at surprisingly low light levels. There were differences in relative feeding rate between the life history strategies; the early migrant fish foraged mostly during the day whereas the delayed migrant fish did more foraging at night. There is some evidence that the early migrant fish made fewer feeding attempts over the winter, which is surprising, since they grow faster over that period. This suggests differences in foraging efficiency, which could contribute to the separation into these two life history strategies.

Effects of diel temperature fluctuation on the standard metabolic rate of juvenile Atlantic salmon (Salmo salar): influence of acclimation temperature and provenience

2015 ◽  
Vol 72 (9) ◽  
pp. 1306-1315 ◽  
Author(s):  
Hélène Oligny-Hébert ◽  
Caroline Senay ◽  
Eva C. Enders ◽  
Daniel Boisclair
Keyword(s):  
Atlantic Salmon ◽  
Metabolic Rate ◽  
Salmo Salar ◽  
Constant Temperature ◽  
Temperature Fluctuation ◽  
Standard Metabolic Rate ◽  
Acclimation Temperature ◽  
Atlantic Salmon Salmo Salar ◽  
Juvenile Atlantic Salmon ◽  
Thermal Regimes

We assessed the metabolic response of juvenile Atlantic salmon (Salmo salar; JAS) originating from two rivers with different natural thermal regimes to different acclimation temperature (15 or 20 °C) and diel temperature fluctuation (constant: ±0.5 °C; fluctuating: ±2.5 °C). Diel temperature fluctuation (15 ± 2.5 °C) near the thermal optimum (16 °C) for the species did not influence standard metabolic rate (SMR) compared with JAS acclimated to a constant temperature of 15 °C. Diel temperature fluctuation at 20 ± 2.5 °C increased SMR of JAS from the warmer river by 33.7% compared with the same fish acclimated to a constant temperature of 20 °C. SMR of JAS from the cooler river held at fluctuating conditions had SMR that were 8% lower than SMR at constant conditions. The results suggest that the mean temperature to which JAS is exposed may affect their responses to diel temperature fluctuation and that this response may vary between populations originating from rivers with different natural thermal regimes. Results were used to develop the first empirical SMR model for JAS subjected to diel temperature fluctuation using fish mass (3–36 g wet) and temperature (12.5–22.5 °C) as explanatory variables.

Behavioural influences on life-history variation in juvenile Atlantic salmon, Salmo salar

1992 ◽  
Vol 33 (4) ◽  
pp. 331-340 ◽  
Author(s):  
John E. Thorpe ◽  
Neil B. Metcalfe ◽  
Felicity A. Huntingford
Keyword(s):  
Life History ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Life History Variation ◽  
Atlantic Salmon Salmo Salar ◽  
Juvenile Atlantic Salmon

Seasonal and Developmental Variation in the Lethality of Zinc to Juvenile Atlantic Salmon (Salmo salar)

1977 ◽  
Vol 34 (1) ◽  
pp. 139-141 ◽  
Author(s):  
V. Zitko ◽  
W. G. Carson
Keyword(s):  
Life History ◽  
Atlantic Salmon ◽  
Developmental Stage ◽  
Salmo Salar ◽  
Water Hardness ◽  
Developmental Variation ◽  
Atlantic Salmon Salmo Salar ◽  
Sensitive Stage ◽  
Juvenile Atlantic Salmon ◽  
Lethal Level

The incipient lethal level (ILL) of zinc to juvenile Atlantic salmon (Salmo salar) in fresh water at a water hardness of 14 mg/ℓ varies from 150 to 1000 μg/ℓ as a function of season and developmental stage of the fish. The ILL increases from 500 to 1000 μg/ℓ during the 1st yr and decreases to 150 μg/ℓ in the following spring. The more sensitive stage in the salmon's life history, evidenced by decrease of ILL coincides with and is probably related to initial stages of the parr–smolt transformation.

scholarly journals Life-history genotype explains variation in migration activity in Atlantic salmon (Salmo salar).

2021 ◽  
Author(s):  
Petri T Niemela ◽  
Ines Klemme ◽  
Anssi Karvonen ◽  
Pekka Hyvarinen ◽  
Paul V Debes ◽  
...  
Keyword(s):  
Life History ◽  
Atlantic Salmon ◽  
Salmo Salar ◽  
Life History Strategy ◽  
Dependent Manner ◽  
Life History Variation ◽  
Migration Activity ◽  
Early Maturation ◽  
Atlantic Salmon Salmo Salar ◽  
Activity Measurements

One of the most important life-history continuums is the fast-slow axis, where fast individuals mature earlier than slow individuals. Fast individuals are predicted to be more active than slow individuals; high activity is required to maintain a fast life-history strategy. Recent meta-analyses revealed mixed evidence for such integration. Here, we test whether known life-history genotypes differ in activity expression by using Atlantic salmon (Salmo salar) as a model. In salmon, variation in Vgll3, a transcription co-factor, explains ~40% of variation in maturation timing. We predicted that the allele related to early maturation (vgll3*E) would be associated with increased activity. We used an automated surveillance system to follow ~1900 juveniles including both migrants and non-migrants (i.e. smolt and parr fish, respectively) in semi-natural conditions over 31 days (~580 000 activity measurements). Against our prediction, vgll3 did not explain variation in activity in pooled migrant and non-migrant data. However, in migrants, vgll3 explained variation in activity according to our prediction in a sex-dependent manner. Specifically, in females the vgll3*E allele was related to increasing activity, whereas in males the vgll3*L allele (later maturation allele) was related to increasing activity. These sex-dependent effects might be a mechanism maintaining within-population genetic life-history variation.

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