Effects of photoperiod and light intensity on growth and activity of juvenile haddock (Melanogrammus aeglefinus)
By E. Trippel, S. Neil. 2003
122 citations recorded by the source corpus.
Abstract Enhancement of growth of juvenile haddock ( Melanogrammus aeglefinus ) was achieved through photomanipulation. After 24 weeks (August–January), hatchery-reared haddock under 24 h light were 53–60% heavier than those under natural photoperiod. In a second 24-week experiment, haddock were grown under five photoperiod regimes (natural photoperiod, 12, 16, 20 and 24 h light) with two light intensities (30 and 100 lx) at 24 h. Continuous light (and 20 h light) resulted in the greatest growth response, though other seasonally unchanging photoperiods (12 and 16 h light) also resulted in faster growth than natural photoperiod. Reduced light intensity, from 100 to 30 lx, at 24 h, led to a further 11% improvement in body mass. The effects of photomanipulation declined as temperatures decreased in late autumn and winter. Locomotor activity was the greatest under natural photoperiod (100 lx), less at 24 h (100 lx) and lowest at 24 h (30 lx). Lower swimming activity under continuous dim light may translate into metabolic savings and increased body mass. Integrating these findings with research on larval haddock suggests a period in the ontogeny exists during which bright light should be dimmed to maximize growth and this perhaps coincides with changes in body morphology and behaviour associated with benthic foraging.
Subfields: Aquatic Science, Ecology, Nature and Landscape Conservation
View Paper: https://www.semanticscholar.org/paper/7b28c1cb540db371289c68359032008a5989e79f
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In Aquatic Science
In Nature and Landscape Conservation
Citations in the corpus
- Effect of photoperiod manipulation on the growth performance and stress response of juvenile red sea bream (Pagrus major) (2006, background): “, 2003); haddock, Melanogrammus aeglefinus (Trippel and Neil, 2003) and gilthead seabream, S.”
- Effect of light intensity on growth, survival and skin color of juvenile Chinese longsnout catfish (Leiocassis longirostris Gunther) (2005, background): “As a crepuscular feeding fish, Chinese longsnout catfish had less activity at suitable light intensity and more food energy could be used for growth (Trippel and Neil, 2003).”
- Maternal and seasonal differences in egg sizes and spawning activity of northwest Atlantic haddock (Melanogrammus aeglefinus) in relation to body size and condition (2004, background): “As well, interest in cultivating a variety of gadoids has intensified as the harvested landings of groundfish decline globally (Baskerville-Bridges and Kling 2000; Hansen et al. 2001; Trippel and Neil 2003).”
- Photoperiod can be used to enhance growth and improve feeding efficiency in farmed rainbow trout, Oncorhynchus mykiss (2006, background): “, 1995, 1997), haddock, Melanogrammus aeglefinus (Trippel and Neil, 2003), European sea bass, Dicentrarchus labrax, (Rodriguez et al.”