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- Title
Influence of prey condition and incubation method on mortality, growth and metabolic rate during early life history in lake sturgeon, Acipenser fulvescens.
- Authors
Yoon, G. R.; Deslauriers, D.; Anderson, W. G.
- Abstract
Environmental conditions during early life can have a profound impact on developmental trajectory and ultimately ecological fitness of individuals. Therefore, from a conservation perspective it is vital to understand the longer‐term implications of early phenotypic development on survival. In this study, we examined the effects of temperature (maintained at 16°C or ambient river temperature), prey condition (live or dead Artemia) and incubation method (tumbling jar or natural hatching over substrate) on the routine or standard metabolic rate (RMR, SMR), maximum metabolic rate (MMR), factorial aerobic scope, energy density (ED), whole body triglyceride concentration (TG), growth and mortality rate of age‐0 lake sturgeon. Our results demonstrated that fish fed live artemia had significantly lower ED, growth and high mortality rates than those fed dead artemia at 32 days post‐fertilisation (dpf) (p <.001). However, at 133 dpf fish fed live artemia showed higher MMR and no difference in ED, TG and growth rate compared to those fed dead prey during early life history. The present study showed that inclusion of live prey at the onset of exogenous feeding may be considered to promote a more natural phenotypic development in larval lake sturgeon.
- Subjects
LAKE sturgeon; MORTALITY; LIFE history theory; ARTEMIA; DNA mismatch repair
- Publication
Journal of Applied Ichthyology, 2020, Vol 36, Issue 6, p759
- ISSN
0175-8659
- Publication type
Article
- DOI
10.1111/jai.14115