Assessing maternal effects on metabolic rate dynamics along early development in brown trout (Salmo trutta): an individual-based approach

2009 ◽  
Vol 180 (1) ◽  
pp. 25-31 ◽  
Author(s):  
Thomas Régnier ◽  
Valérie Bolliet ◽  
Jacques Labonne ◽  
Philippe Gaudin
Keyword(s):  
Metabolic Rate ◽  
Early Development ◽  
Maternal Effects ◽  
Brown Trout ◽  
Salmo Trutta ◽  
Brown Trout Salmo Trutta

Experimental evidence simultaneously confirms and contests assumptions implicit to otolith microchemistry research

2014 ◽  
Vol 71 (3) ◽  
pp. 356-365 ◽  
Author(s):  
Geoff Veinott ◽  
Peter A.H. Westley ◽  
Craig F. Purchase ◽  
Lucas Warner
Keyword(s):  
Life History ◽  
Maternal Effects ◽  
Brown Trout ◽  
Salmo Trutta ◽  
Otolith Microchemistry ◽  
Maternal Influence ◽  
Elemental Concentrations ◽  
The Core ◽  
Chemical Signatures ◽  
Brown Trout Salmo Trutta

Otolith microchemistry has become an integral fisheries tool, yet the utility of this tool hinges on the assumptions that (i) elements are temporally stable once deposited in the otolith and (ii) the influence of maternal effects are temporally limited. Here we test these assumptions by quantifying through time the chemical signatures from two families of brown trout (Salmo trutta), differing in maternal life history (i.e., mothers were either anadromous or nonanadromous). Concentrations of zinc, strontium, and barium were temporally stable in the core signatures between different aged siblings, but significant differences in the elemental concentrations of magnesium and manganese were detected. The Sr concentration (indicative of maternal influence) on the growing surface of otoliths converged briefly between families at 3–5 weeks post-emergence, but never stabilized during the course of the experiment. Taken together, these results both confirm and call into question assumptions implicit to otolith microchemistry research. To the extent that the patterns observed here are representative across species, caution is warranted when using otolith microchemistry to address certain types of ecological questions in nature.

Thyroid hormones in brown trout (Salmo trutta) reproduction and early development

1994 ◽  
Vol 13 (6) ◽  
pp. 485-493 ◽  
Author(s):  
Costadinos C. Mylonas ◽  
Craig V. Sullivan ◽  
Jeffrey M. Hinshaw
Keyword(s):  
Thyroid Hormones ◽  
Early Development ◽  
Brown Trout ◽  
Salmo Trutta ◽  
Brown Trout Salmo Trutta

Is metabolic rate a reliable predictor of growth and survival of brown trout (Salmo trutta) in the wild?

2005 ◽  
Vol 62 (3) ◽  
pp. 643-649 ◽  
Author(s):  
D Álvarez ◽  
A G Nicieza
Keyword(s):  
Metabolic Rate ◽  
Brown Trout ◽  
Growth Rates ◽  
Salmo Trutta ◽  
Environmental Variability ◽  
Metabolic Rates ◽  
Juvenile Mortality ◽  
Natural Streams ◽  
Brown Trout Salmo Trutta ◽  
In The Wild

In salmonids, there seems to be a positive correlation between standard metabolic rate and growth rate under artificial rearing conditions. Several recent studies have suggested that phenotypic correlations between physiological or behavioural traits and developmental or life history responses might be common when assayed in low-complexity habitats but rare in those with a high degree of spatiotemporal complexity. This study provides the first test of the connection between metabolic and growth rates of juvenile brown trout (Salmo trutta) in natural streams. In two out of four streams, there was no relationship between metabolic rates and subsequent growth, whereas in the two others, growth and metabolic rates were negatively correlated. Furthermore, survival rates were either unaffected or negatively correlated with metabolic rates. These results reveal complex relationships between metabolic rate, growth, and environmental variability and suggest that (i) in the wild, negative selection on high metabolic rates may result from both juvenile mortality and reduced growth rates, (ii) the conclusions derived from laboratory experiments are not directly applicable to natural populations, and (iii) the correlations between metabolic rate and growth can prove useful after selection of the appropriate spatial and temporal scales.

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