ArticleFish physiology and biochemistry2026
The photoperiods with multiple light/dark cycles affect growth and relate to oxidative-stress for largemouth bass (Micropterus salmoides) larvae in recirculating aquaculture systems.
Article in Fish physiology and biochemistry, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
A 28-day study was conducted to examine the effects of photoperiods with multiple light/dark cycles on growth performance and oxidative stress for largemouth bass (Micropterus salmoides) larvae in recirculating aquaculture systems (RAS). Larvae fish were exposed to four different photoperiods [light/dark (L:D), h] as follows: 6L:18D; 12L:12D; 18L:6D and 24L:0D. The feeding number was 8 times a day. The light duration of each treatment was 45 min, 90 min, 135 min and 180 min respectively in one light/dark cycle (feeding interval) of 180 min. A total of six thousand fish (0.5229 ± 0.0180 cm, 0.0021 ± 0.0002 g) were randomly kept in the 12 cages (4 treatments × 3 replicates × 500 individuals). The results showed that the body weight, weight gain rate (WGR), specific growth rate (SGR), thermal growth coefficient (TGC), Fulton's condition factor (K) and mRNA expressions of growth hormone (gh) and insulin-like growth factor 1 (igf-1) generally increased with the extension of photoperiods, and they were highest in the 24L:0D treatment and were second in the 18L:6D treatment. The variation coefficients for body length (CV
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