Latitudinal variation of nutritional condition and diet in two warm water copepod species, Euchaeta and Pleuromamma spp. from the Northwest Pacific Ocean using lipid biomarkers

Title
Latitudinal variation of nutritional condition and diet in two warm water copepod species, Euchaeta and Pleuromamma spp. from the Northwest Pacific Ocean using lipid biomarkers
Author(s)
주세종; 고아라; 이창래
Publication Year
2010-11-25
Abstract
In order to understand the latitudinal variation of lipid contents and compositions in copepods, we collected warm water copepod species (Euchaeta and Pleuromamma spp.) from the four different regions from low (sub-tropical) to mid (temperate) latitudes in the Northwest Pacific Ocean. Total lipid contents of Pleuromamma spp. were about 10ug•ind-1 with little latitudinal variations, whereas Euchaeta spp. showed slightly higher lipid content (≈ 17ug•ind-1) than Pleuromamma spp. with the latitudinal gradient (low at sub-tropic and high at temperate). Wax esters, known as the major storage lipid classes, were found to be the dominant lipid classes (accounting for more than 35% of total lipids) in Euchaeta spp., whereas, in Pleuromamma spp., phospholipids, known as the membrane components, were the dominant lipid classes with an exception of specimens from warm pool region showing the dominance of storage lipids as a form of triacylglycerols.Among fatty acids, polyunsaturated fatty acids (PUFA), specially docosahexaenoic acid (DHA : 22:6(n-3)) (about 35% of total fatty acids), were most abundant in Euchaeta spp., while saturated fatty acids (SAFA), specially hexadecanoic acid (16:0) (about 30% of total fatty acids), were most abundant in Pleuromamma spp.. Among the neutral fraction of lipids, phytol, originated from the side chain of chlorophyll, was found in all samples which could indicate the feeding activity on phytoplankton. While only trace amounts of short-chain fatty alcohols were found in Pleuromamma spp., significant amounts of fatty alcohols were found in Euchaeta spp. Particularly, significant amounts of long chain monounsaturated fatty alcohols (20:1 and 22:1), generally known to be found in cold water copepod species, were found in Euchaeta spp. from low latitudes. The latitudinal variation of trophic lipid markers in these copepods could be significantly related with in-situ food availability and species-specific diet preference. The re
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/28515
Bibliographic Citation
ternational Workshop on Tropical Ocean Dynamics and Mid-latitudinal Phenomena in the Northwestern Pacific Ocean, pp.34 - 35, 2010
Publisher
한국해양연구원
Type
Conference
Language
English
Publisher
한국해양연구원
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