Ontogeny of pancreatic enzymes in larval red drum Sciaenops ocellatus.
By Lazo, Holt, Arnold. 2000
134 citations recorded by the source corpus.
The growth, survival and trypsin, lipase and amylase activities of red drum larvae were measured in two experiments. For the first trial, a group was fed live prey only (L) and another group was fed a combination of a microparticulate diet (MPD) and live food (L-MP). For the second growth trial a group fed the MPD only (MP) and a starvation group (ST) were examined in addition to the L and L-MP treatments. Enzyme activities of live prey were measured to estimate their possible contribution to larval digestion. No significant (P > 0.05) differences in final size and survival were observed between treatments L and L-MP. Larvae subjected to starvation or fed the MPD diet alone were smaller than treatments fed live prey and did not survive past days 5 and 14, respectively. Trypsin, lipase and amylase activities were detectable at hatching. No significant differences (P > 0.05) in total enzyme activities among treatments were observed before day 14. Specific activity of trypsin, lipase and amylase peaked on day 3 (prior to first feeding) and subsequently decreased. For trypsin, the percentage of enzyme activity potentially attributable to ingested prey increased with age to a maximum of 17%. For lipase and amylase this fraction was less than 5% throughout the study, except on day 8 (12% and 24%, respectively). The lack of significant differences observed in the activity of digestive enzymes among treatments suggests that dietary regime, availability of prey and possible effects of exogenous enzymes did not significantly influence enzyme activity. Therefore, the lower growth rate observed in the L-MP, MP and starved treatments cannot be attributed to low digestive enzyme production of the enzymes measured. It is more likely that the MPD failed to supply the required nutrients for adequate development.
Subfields: Aquatic Science, Health, Toxicology and Mutagenesis, Nature and Landscape Conservation
View Paper: https://www.semanticscholar.org/paper/baa934ad02844cf123513cb7277ca7cb2881057c
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In Aquatic Science
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Citations in the corpus
- Dietary neutral lipid level and source in marine fish larvae: effects on digestive physiology and food intake (2007, background): “In red drum, lipase specific activity was detectable at hatching, peaked at 3 days after hatching (DAH), just prior to first feeding, and subsequently decreased (Lazo et al., 2000).”
- Feeding behaviour and digestive physiology in larval fish: current knowledge, and gaps and bottlenecks in research (2013, background): “A second increase in amylase activity at the end of larval stage has also been described in red drum (Sciaenops ocellatus) (Lazo et al. 2000), yellow croaker (Pseudosciaena crocea) (Ma et al.”
- Dietary taurine enhances growth and digestive enzyme activities in larval cobia (2012, background): “Such decrease in enzyme specific activity is commonly observed during larval development (Chen et al., 2006; Gisbert et al., 2009; Lazo et al., 2000) and is due to a general increase in total protein.”
- Effects of dietary lipid levels on growth, survival and lipid metabolism during early ontogeny of Pelteobagrus vachelli larvae (2010, background): “red drum (Lazo et al., 2000), while at 2 DAH (first feeding) in the brush border and cytoplasm of enterocytes of Senegalese sole (Ribeiro et al.”
- Co-feeding microparticulate diets with algae : Toward eliminating the need of zooplankton at first feeding in larval red drum (Sciaenops ocellatus) (2000, methodology): “Artemia was the same as previously described by Lazo et al. 2000 .”
- Development of the digestive capacity in larvae of haddock (Melanogrammus aeglefinus) and Atlantic cod (Gadus morhua) (2006, unknown): “In order to produce satisfactory microparticulate diets, researchers must develop feeds that are efficiently ingested, easily broken down, and rendered soluble for absorption providing the essential nutrients required by the developing larvae (Lazo et al., 2000).”