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

• Published in: Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology Vol. 180; no. 1; pp. 25 - 31
• Main Authors: Régnier, Thomas, Bolliet, Valérie, Labonne, Jacques, Gaudin, Philippe
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer-Verlag 01.01.2010; Springer Nature B.V; Springer Verlag
• Subjects: Animal Physiology; Animals; Bayes Theorem; Biochemistry; Biomedical and Life Sciences; Biomedicine; Body Size; Clutch Size; Embryonic Development; Energy Metabolism; Female; Fertilization; Gonads - anatomy & histology; Human health and pathology; Human Physiology; Life Cycle Stages; Life Sciences; Male; Organ Size; Original Paper; Oxygen Consumption; Trout - growth & development; Trout - metabolism; Trout - physiology; Zoology; Metabolic rate; Individual level; Micro-respirometry; Maternal effect; Bayesian model; MICRO-RESPIROMETRY; METABOLIC RATE; BAYESIAN MODEL; INDIVIDUAL LEVEL; SALMONIDE; MATERNAL EFFECT
• ISSN: 0174-1578; 1432-136X
• DOI: 10.1007/s00360-009-0385-x

Routine metabolic rate (oxygen consumption) of individual eggs and larvae of brown trout ( Salmo trutta ) originating from different families were monitored from fertilisation to the onset of emergence by means of flow through micro-respirometry. This measuring system revealed an accurate tool to measure oxygen consumption on small organisms at the individual level, and daily consumption proved to be very stable. The mass-specific metabolic rate remained low from fertilisation to hatching, and then increased quickly until the age of emergence. A Bayesian modelling approach was used to adequately infer maternal effects on metabolic rate dynamics all along the development period. Substantial differences were found between families, affecting average metabolic rate as well as intra-family variance. That is, offspring originating from different females may have different energetic needs at emergence from gravel. Moreover, between siblings, variability in metabolic rate is also under the influence of maternal effects. Implications of this metabolic rate variability are discussed with regard to life history strategies and early behaviours.