Do fatty acid profiles help to explain sesarmid crabs food choice

Q3 Agricultural and Biological Sciences Eurasian Journal of Biosciences Pub Date : 2011-07-01 DOI:10.5053/EJOBIOS.2011.5.0.11
I. Mchenga, M. Tsuchiya
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引用次数: 3

Abstract

We evaluate the use of the combination approach of fatty acid (FA) profiles and Carbon/Nitrogen ratios to investigate the feeding preference of the sesarmid crab Perisesarma bidens on different diets. The alga Enteromorpha intestinalis, Kandelia obovata leaves and propagules were used in a laboratory feeding assay. Consumption rates of P. bidens were higher in the order of algae= leaves>propagules. C/N ratios indicate that P. bidens significantly assimilates both nitrogen and carbon from algae, nitrogen but not carbon from brown leaves, and only carbon from propagules. A comparison of FAs in tissues and faeces indicated that crabs efficiently assimilate essential FAs (EFAs) from a given diet in the order of algae>leaves>propagules. Results of higher EFA ratios ( 3/ 6) match with that of low C/N ratios indicating that algae had higher nutritional value than leaves and propagules. FA profiles suggested that brown leaf palatability was due to decomposing activity by bacteria and fungi in the leaf tissues. These data suggest that the combination of FA profiles and C/N ratios provides a better understanding of the diet choice by sesarmid crabs.
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脂肪酸谱有助于解释芝麻蟹的食物选择吗
利用脂肪酸谱和碳氮比的组合方法,研究了芝麻蟹对不同饲料的摄食偏好。以肠Enteromorpha ininalis、倒卵形坎大莱(Kandelia obovata)叶片和繁殖体为材料,进行了实验室饲养试验。从藻类=叶片>繁殖体的顺序来看,拜登草的消耗率较高。C/N比值表明,拜登草对藻类的氮和碳均有显著的吸收,对褐叶的氮和碳不吸收,对繁殖体的碳只吸收。组织和粪便中脂肪酸含量的比较表明,蟹类能有效地从特定的日粮中吸收必需脂肪酸(EFAs),其顺序为藻类>叶片>繁殖体。较高的EFA比率(3/ 6)与较低的C/N比率相吻合,表明藻类比叶片和繁殖体具有更高的营养价值。FA分析表明,棕色叶片的适口性是由于叶片组织中细菌和真菌的分解活性所致。这些数据表明,结合FA谱和碳氮比可以更好地了解芝麻蟹的日粮选择。
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来源期刊
Eurasian Journal of Biosciences
Eurasian Journal of Biosciences Agricultural and Biological Sciences-Agricultural and Biological Sciences (all)
CiteScore
1.20
自引率
0.00%
发文量
0
期刊介绍: EurAsian Journal of BioSciences (Abbrev. Eurasia J Biosci or EJOBIOS) is an international, refereed electronic journal. It publishes the results of original research in the field of biological sciences restricted tomorphology, physiology, genetics, taxonomy, ecology and biogeography of both prokaryotic and eucaryotic organisms. The journal encourages submission of manuscripts dealing with plant biology, animal biology, plant physiology, microbiology, hydrobiology, ecology and environmental science, ethnobiology, biodiversity and conservation biology. EurAsian Journal of BioSciences publishes original articles in the following areas: -Agriculture, Fisheries & Food -Anatomy & Morphology -Behavioural Sciences -Biology, Biochemistry and Biotechnology -Biophysics -Biology Education -Cellular Biology and Anatomical Sciences -Ecology, Evolution & Environment -Entomology -Forestry -General Biology -Genetics & Heredity -Life Sciences - Other topics -Microbiology and Immunology -Molecular Biology -Mycology -Palaeontology -Parasitology -Pharmacology & Pharmacy -Physiology and Related Sciences -Plant Sciences -Toxicology -Veterinary Sciences -Virology -Zoology
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