High dietary lipid level promotes low salinity adaptation in the marine euryhaline crab (<i>Scylla paramamosain</i>)

High dietary lipid level promotes low salinity adaptation in the marine euryhaline crab (Scylla paramamosain)

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Jiaxiang Luo^a, Chen Ren^a, Tingting Zhu^a, Chen Guo^a, Shichao Xie^a, Yingying Zhang^a, Zheng Yang^a, Wenli Zhao^a, Xiangsheng Zhang^a, Jingjing Lu^a, Lefei Jiao^a, Qicun Zhou^a, Douglas R. Tocher^b, Min Jin^a^,^*

Animal Nutrition | 2023, 12(1) : 297 - 307

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Animal Nutrition | 2023, 12(1): 297-307

• Short Communication •

High dietary lipid level promotes low salinity adaptation in the marine euryhaline crab (Scylla paramamosain)

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Affiliations

^aLaboratory of Fish and Shellfish Nutrition, School of Marine Sciences, Ningbo University, Ningbo 315211, China

^bGuangdong Provincial Key Laboratory of Marine Biotechnology, Institute of Marine Sciences, Shantou University, Shantou 515063, China

Published: 2023-03-10 doi: 10.1016/j.aninu.2022.10.004

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Abstract

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The physiological processes involved in adaptation to osmotic pressure in euryhaline crustaceans are highly energy demanding, but the effects of dietary lipids (fat) on low salinity adaptations have not been well evaluated. In the present study, a total of 120 mud crabs (Scylla paramamosain, BW = 17.87 ± 1.49g) were fed control and high-fat (HF) diets, at both medium salinity (23‰) and low salinity (4‰) for 6 wk, and each treatment had 3 replicates with each replicate containing 10 crabs. The results indicated that a HF diet significantly mitigated the reduction in survival rate, percent weight gain and feed efficiency induced by low salinity (P < 0.05). Low salinity lowered lipogenesis and activated lipolysis resulting in lipid depletion in the hepatopancreas of mud crabs (P < 0.05). Thus, HF diets enhanced the process of lipolysis to supply more energy. In the gills, low salinity and the HF diet increased the levels of mitochondrial biogenesis markers, the activity of mitochondrial complexes, and the expression levels of genes related to energy metabolism (P < 0.05). Consequently, the positive effects of the HF diet on energy metabolism in mud crabs at low salinity promoted osmotic pressure regulation. Specifically, significantly higher haemolymph osmotic pressure and inorganic ion content, as well as higher osmotic pressure regulatory enzyme activity in gills, and gene and protein expression levels of NaK-ATPase were observed in crabs fed the HF diet at low salinity (P < 0.05). In summary, high dietary lipid levels improved energy provision to facilitate mitochondrial biogenesis, which increased ATP provision for osmotic pressure regulation of mud crabs. This study also illustrates the importance of dietary lipid nutrition supplementation for low salinity adaptations in mud crabs.

Key words

Osmotic pressure regulation / Mitochondrial energy metabolism / Lipid metabolism

Cite this Article

Jiaxiang Luo, Chen Ren, Tingting Zhu, Chen Guo, Shichao Xie, Yingying Zhang, Zheng Yang, Wenli Zhao, Xiangsheng Zhang, Jingjing Lu, Lefei Jiao, Qicun Zhou, Douglas R. Tocher, Min Jin. High dietary lipid level promotes low salinity adaptation in the marine euryhaline crab (Scylla paramamosain)[J]. Animal Nutrition, 2023 , 12 (1) : 297 -307 . DOI: 10.1016/j.aninu.2022.10.004

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Year 2023 volume 12 Issue 1

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Article Info

doi: 10.1016/j.aninu.2022.10.004

Receive Date：2022-04-22
Online Date：2026-02-03
Published：2023-03-10

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History

Received：2022-04-22
Revised：2022-08-25
Accepted：2022-10-23

Affiliations

^aLaboratory of Fish and Shellfish Nutrition, School of Marine Sciences, Ningbo University, Ningbo 315211, China

^bGuangdong Provincial Key Laboratory of Marine Biotechnology, Institute of Marine Sciences, Shantou University, Shantou 515063, China

Corresponding:

^* Corresponding author. E-mail address: jinmin@nbu.edu.cn (M. Jin).

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表12种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

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