by KeAi Communications Co.
The largemouth bass (Micropterus salmoides) is a perciform species native to the United States. It was introduced to China in 1983 and since then has been widely cultivated around the world as a commercial valuable fish. In China alone, the annual production level of largemouth bass exceeds 470,000 tons.
In traditional commercial aquaculture practices, largemouth bass have historically been cultured using forage fish. However, there is a shift towards the use of formulated diets to reduce the fish’s reliance on bait and lower production costs. However, the effect of these formulated diets on the nutritional content and muscle quality of largemouth bass, as well as the underlying mechanisms involved, remain unclear.
In the recent publication of Reproduction and Breeding, a group of Chinese researchers in the field of genetic breeding shed light on the effect of replacing forage fish in largemouth bass food formulas. The study highlighted significant changes in muscle quality and fiber characteristics as a result of this dietary shift.
“Our findings show that although largemouth bass fed formula diets showed a lower rate of weight gain, they showed a significant increase in crude protein within their tissues. in muscle, determined by compositional evaluation,” said Dongmei Ma, corresponding author of the study. .
Through a comparative analysis of transcriptomes that were specifically made for muscle tissues, the researchers successfully identified pathways that showed significant improvement in amino acid metabolism.
The study revealed through microsection observation that largemouth bass fed with formulated diets showed a larger diameter of muscle fibers compared to those fed with forage fish. “The change in fiber characteristics can be attributed to an increase in pathways involved in muscle development and an increased level of expression of genes encoding collagen, fibronectin, and laminin. These factors promote the proliferation of myoblasts and collagen fibrillogenesis,” explained Ma.
The study contributes valuable insights into the understanding of muscle fiber changes and provides potential ways for optimizing aspects of nutrition and meat quality in largemouth bass.
Zaixuan Zhong et al, Proximate compositions evaluation, histology and transcriptome analysis revealed the effects of formulated diets on muscle quality of Micropterus salmoides, Reproduction and Breeding (2023). DOI: 10.1016/j.repbre.2023.04.002
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Citation: Effects of formulated diets on muscle quality and fiber characteristics of largemouth bass (2023, July 18) retrieved 18 July 2023 from https://phys.org/news/2023-07-effects-diets -muscle-quality-fiber.html
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