Effects of starvation on survival, biomass, and lipid composition of newly hatched larvae of the blue swimmer crab, Portunus pelagicus (Linnaeus, 1758)

Xugan Wu; Chaoshu Zeng; Paul C Southgate

doi:10.1007/s10499-016-0042-9

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Effects of starvation on survival, biomass, and lipid composition of newly hatched larvae of the blue swimmer crab, Portunus pelagicus (Linnaeus, 1758)

Journal article

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Effects of starvation on survival, biomass, and lipid composition of newly hatched larvae of the blue swimmer crab, Portunus pelagicus (Linnaeus, 1758)

Xugan Wu, Chaoshu Zeng and Paul C Southgate

Aquaculture International, Vol.25(1), pp.447-461

2017

DOI: https://doi.org/10.1007/s10499-016-0042-9

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Abstract

blue swimmer crab

highly unsaturated fatty acid

lipid composition

newly hatched larvae

starvation resistance

survival

Lipids are crucial nutrients for survival and development of crustacean larvae. This study investigated the effects of starvation on survival, body weight, and lipid composition of newly hatched larvae of Portunus pelagicus. The results showed that during starvation, average survival time of newly hatched zoea I larvae was 3.87 days. A significant decreasing trend was detected for individual dry weight (DW) during starvation and was described as DW = 0.2x2 - 1.462x + 15.023, R2 = 0.9985, where x is the starvation duration in days. DW and total lipids decreased by 17.42 and 38.46 % after 3 days of starvation, respectively. For newly hatched larvae, total lipids were dominated by phospholipids (PL) (75.55-93.57 %) and 50.39 % of PL were utilized during the 3-day starvation period. This indicates that membrane structural lipids of newly hatched P. pelagicus larvae were oxidized as an energy source during continuous starvation. There were concurrent increases in free fatty acids and cholesterol that probably resulted from the decomposition of sterol esters to free fatty acids and cholesterol. Newly hatched P. pelagicus larvae contained substantially higher levels of 20:5n3 (18.90 %) and 22:6n3 (18.24 %) than other Portunid crabs. During starvation, the highest fatty acid reduction rates were found for 20:4n6, 20:5n3, and 22:6n3 (P < 0.05), and the preferential depletion of these fatty acids may suggest that the HUFA requirements of early P. pelagicus larvae are lower than those of the other Portunids.

Details

Title: Effects of starvation on survival, biomass, and lipid composition of newly hatched larvae of the blue swimmer crab, Portunus pelagicus (Linnaeus, 1758)
Authors: Xugan Wu (Author) - James Cook University
Chaoshu Zeng (Author) - James Cook University
Paul C Southgate (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
Publication details: Aquaculture International, Vol.25(1), pp.447-461
Publisher: Springer Netherlands
Date published: 2017
DOI: 10.1007/s10499-016-0042-9
ISSN: 0967-6120
Organisation Unit: School of Science and Engineering - Legacy; Australian Centre for Pacific Islands Research; University of the Sunshine Coast, Queensland; School of Science, Technology and Engineering
Language: English
Record Identifier: 99451026102621
Output Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Web Of Science research areas: Fisheries

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