Publications by authors named "Naveen Ranasinghe"
Physiology, leptin gene expression, and intestinal morphology of pinhead and starved milkfish (Chanos chanos).
Comp Biochem Physiol B Biochem Mol Biol
December 2024
Article Synopsis
- - The study investigates "pinhead," a condition affecting farmed fish like milkfish, characterized by extreme weight loss and lack of appetite, comparing it to healthy and starved fish.
- - Results show that pinhead milkfish exhibit lower overall health metrics and signs of internal water imbalance, with high levels of the anorexigenic hormone leptin A, possibly contributing to their anorexia.
- - This research highlights the physiological impacts of pinhead condition for the first time, indicating a need for further exploration of stress factors leading to this issue and potential solutions to improve fish health.
Article Synopsis
- Global warming has increased cold extremes that impact aquaculture economies, especially affecting milkfish (Chanos chanos) in subtropical regions due to high mortality from cold stress.* -
- Researchers established a primary culture of milkfish liver cells to study the cellular response to cold stress, finding that the salinity levels of the water dramatically influenced reactive oxygen species (ROS) responses and cell death rates.* -
- Transcriptomic analysis revealed distinct gene expression patterns linked to cold stress, with seawater conditions promoting metabolic pathways and fresh water leading to increased cell death, highlighting potential strategies for mitigating aquaculture losses.*
Cold snaps during the winter present a critical challenge for Asian seabass () in Taiwan, as sudden temperature drops significantly affect their growth and survival. This study explores the effects of dietary grape extract (GE) from on the growth performance, oxidative stress regulation, and thermal tolerance of this commercially valuable fish. Over a 60-day feeding trial, four dietary groups were tested: a control diet without GE and three diets supplemented with GE at 2% (GE20), 3% (GE30), and 4% (GE40) with commercial feed.
View Article and Find Full Text PDFEctothermic fish exposure to hypothermal stress requires adjusting their metabolic molecular machinery, which was investigated using Indian medaka (; 10 weeks old, 2.5 ± 0.5 cm) cultured in fresh water (FW) and seawater (SW; 35‱) at room temperature (28 ± 1 °C).
View Article and Find Full Text PDF