Impact of spectral composition on larval haddock, Melanogrammus aeglefinus L., growth and survival

Abstract

In a small-scale culture experiment, larval haddock, Melanogrammus aeglefinus L., were raised under various combinations of light quality [blue (470 nm), green (530 nm) or full-spectrum white light] and light intensity [low (0.3±0.4 mmol s À1 m À2 ) or high (1.7±1.9 mmol s À1 m À2 )], and in total darkness (both fed, and starved). Larval growth (0.9% day À1 in standard length; 2.4% day À1 in body area) was not significantly different between any combination of coloured light. At the time of total mortality in the starved treatment, survival was significantly reduced under low intensity, full-spectrum white light (13%) vs. all other coloured light treatments (68%). Larvae raised under both continuous dark treatments (fed and starved) exhibited morphological changes associated with irreversible starvation (point-of-no-return). Lack of a pronounced effect of light quality on larval haddock growth probably results from a combination of plasticity in early larval vision, and enhanced encounter rates between larvae and prey at the relatively high prey densities used in aquaculture.

Influence of Colored Light on Growth rate of Juveniles of Fish

“…However, there-are some exceptions. For instance, the growth rate in some species (Atlantic salmon, haddock) is independent of light wavelength (Stefanson and Hansen 1998;Downing 2002).…”

“…and young carp (Cyprinus carpio L.) increased with green light (Radenko and Alimov 1991;Ruchin et al 2002). Gaignon and co-workers (Gaignon et al 1993) revealed a negative effect of yellow light on Na + , K + -ATPase activity in Atlantic salmon Salmo salar L. However, no difference was detected in the growth rate of Altantic salmon and haddock treated with colored light (Stefansson, Hansen, 1989;Downing, 2002).…”

“…Most species of fish have well-developed color sight, and are therefore very sensitive to colored light. For instant, the survival rate of haddock larvae (Mellanogrammus aeglefinus L.) is higher with blue and green light (Downing 2002). The growth rate of silver carp larvae (Hypophthalmichthys molitrix Val.)…”

Growth, survival, diet, and on-growing husbandry of haddock Melanogrammus aeglefinus in tanks and netpens

“…Development of haddock aquaculture has occurred mainly in Canada (Downing and Litvak, 1999;Aiken, 2003), where research has been carried out on parental effects and environmental conditions in the hatchery period (Downing and Litvak, 1999Buckley et al, 2000;Downing, 2002;Trippel and Neil, 2003;Rideout et al, 2004a, b), the effects of photothermal manipulation on reproductive development (Martin-Robichaud and Berlinsky, 2004), live and particulate feed requirements (Hamlin and Kling, 2001;Kim and Lall, 2001), and dietary nutrient requirements (Nanton et al, 2001;Lall et al, 2003). However, the on-growing performance of haddock has not received much attention, although fish have been farmed in netpens by Heritage Aquaculture Limited in Canada; up to 50 t of skinless, boneless fillets were marketed and sold in Canada and the USA per annum between 2000 and 2005 (A. S. Lall, pers.…”

Effects of Photoperiod and Different Artificial Light Colors on Nile Tilapia Growth Rate

“…Most species of fish have well-developed color sight, and are therefore very sensitive to colored light. For instant, the survival rate of haddock larvae (Mellanogrammus aeglefinus L.) is higher with blu and green light (Downing 2002). The growth rate of silver carp larvae (Hypophthalmichthys molitrix Val.)…”