The evaluation of seasonal fatty acid composition and food sources of Pileurobrachia pileus (Ctenophora) in terms of trophic marker fatty acids in the Southeastern Black Sea

Nurgül Sen Özdemir; Muzaffer Feyzioğlu; Fatma Caf

doi:10.12714/egejfas.38.2.10

TR EN

Güney Doğu Karadeniz’de Pleurobrachia pileus'un (Ctenophora) trofik işaret yağ asitleri açısından mevsimsel yağ asiti kompozisyonu ve besin kaynaklarının değerlendirilmesi

Öz

Pileurobrachia pileus’un lipit ve yağ asiti kompozisyonunun mevsimsel değişimleri Mart 2012’den Şubat 2013’e kadar aylık olarak araştırılmıştır. Ortalama toplam lipit içeriği yüzde (%) ve birey başına (mg ind-1) olarak belirlenmiştir. Ortalama toplam lipit miktarı en yüksek şubat ayında bulunmuştur (% 1.48; 3.55 mg ind-1). Bununla birlikte, oransal en düşük miktar Nisan ayında (% 0.40) ve birey başına Ağustos ayında (0.33 mg ind-1) belirlenmiştir. P. pileus'taki en önemli yağ asitleri 16: 0, 14: 0, 11: 1 n-9c, 20: 5 n-3 ve 22: 6 n-3 olarak tespit edilmiştir. P. pileus’da ortalama % 27.27 ∑SFA, % 25.04 ∑MUFA ve % 47.63 ∑PUFA belirlenmiştir. EPA ve DHA’nın, başlıca PUFA yağ asitleri olduğu ve. DHA'da mevsimsel değişikliklerin EPA'dan daha belirgin olduğu saptanmıştır (p <0.05). P. pileus yağ asitlerinde, herbivor kalanoid otçul zooplankton trofik işaretleri; 20: 1 n-9 ve DHA / EPA ve herbivor trofik işaretleri; EPA ve DHA içeriğinin yüksek olduğu tespit edilmiştir. Otçul yağ asitlerinin otçul zooplankton ve fitoplanktondan beslenerek alındığı görülmüştür. P. pileus'un mevsimsel yağ asiti değişiminde besinin önemli bir faktör olduğu saptanmıştır. Bunun yanında, P. pileus'un zengin bir lipit içeriğine ve yağ asiti bileşimine sahip olduğu ve Güneydoğu Karadeniz ekosisteminde, herbivor ve karnivor türler arasında önemli bir rol oynadığı ortaya konulmuştur.

Anahtar Kelimeler

The evaluation of seasonal fatty acid composition and food sources of Pileurobrachia pileus (Ctenophora) in terms of trophic marker fatty acids in the Southeastern Black Sea

Abstract

Seasonal changes of the lipid and fatty acid composition of Pleurobrachia pileus investigated monthly from March 2012 to February 2013. Average total lipid content was determined as percentage (%) and per individual (mg ind-1). It was highest in February (1.48 %; 3.55 mg ind-1). However, it was proportionally the lowest in April (0.40 %), and per individual in August (0.33 mg ind-1). Major fatty acids of P. pileus were identified as 16:0, 14:0, 11:1 n-9c, 20:5 n-3, and 22:6 n-3. P. pileus had on average 27.27 % ∑SFA, 25.04 % ∑MUFA and 47.63 % ∑PUFA content. EPA and DHA were the major fatty acids from PUFA. Seasonal changes of DHA were more obvious than EPA (p<0.05). Herbivore calanoid zooplankton trophic markers; 20:1 n-9 and DHA/EPA and herbivory trophic markers; EPA and DHA content were high in P. pileus fatty acids. It showed that herbivory fatty acids were taken by feeding from herbivory zooplankton and phytoplankton. Diet was an important factor in seasonal fatty acid changes of P. pileus. In addition, we revealed that P. pileus has a rich lipid content and fatty acid composition and plays an important role in the Southeastern Black Sea ecosystem functionalities between herbivory and carnivory species.

Keywords

Supporting Institution

KTU- BAP

Project Number

2010.117.001.9

Thanks

We thank research assistant Ümit DOKUZPARMAK and the crew of KTU YAKAMOZ for help in collection of the samples, and Prof. Dr. Ökkeş YILMAZ for his help with GC analyses. This work was a part of PhD study supported by KTU BAP, 2010.117.001.9.

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Details

Primary Language

English

Subjects

Fisheries Management

Journal Section

Research Article

Authors

Nurgül Sen Özdemir ^*
0000-0001-6656-822X
Türkiye

Muzaffer Feyzioğlu
0000-0003-1171-5493
Türkiye

Fatma Caf
0000-0002-0363-4848
Türkiye

Publication Date

June 15, 2021

Submission Date

August 10, 2020

Acceptance Date

February 13, 2021

Published in Issue

Year 2021 Volume: 38 Number: 2

DOI

https://doi.org/10.12714/egejfas.38.2.10

IZ

https://izlik.org/JA24DL87JJ

Cite

RIS / Bibtex

APA

Sen Özdemir, N., Feyzioğlu, M., & Caf, F. (2021). The evaluation of seasonal fatty acid composition and food sources of Pileurobrachia pileus (Ctenophora) in terms of trophic marker fatty acids in the Southeastern Black Sea. Ege Journal of Fisheries and Aquatic Sciences, 38(2), 211-218. https://doi.org/10.12714/egejfas.38.2.10