Abstract
The Notothenia coriiceps liver is commonly infected with parasites, reducing the hepatic mass and inducing the regeneration. In order to better understand the effect of nutrient influx on hepatic regeneration at 0°C, a usual mammal hepatotrophic factor (HF) solution was injected into ten fish (HF group), while ten fish were injected with saline solution (control), twice a day, for 15 days. The liver and carcass weight were measured, and samples were obtained for histological studies. The HF group presented a higher liver/carcass weight (62.5%) than control group. This increase in liver mass was due mainly to hepatocytes hypertrophy, including nuclear size increase and cytoplasmic inclusions of glycogen. Hyperplasia is also observed, although to a lesser extent. The hepatic reaction to HF in Antarctic fish was here demonstrated for the first time, helping to understand the liver response to seasonal nutrient.
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