Seasonal changes in abundance, lipid and fatty acid composition of Calanus euxinus in the South-eastern Black Sea

Özdemir, Nurgül Şen; Feyzioglu, Ali Muzaffer; Caf, Fatma; Yildiz, I.

doi:10.21077/ijf.2017.64.3.62172-09

Cited by 4 publications

(2 citation statements)

References 44 publications

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“…Total lipid amount of C. euxinus from copepoda is the highest in February 7.03% (WW). Also, C. euxinus reaches the highest abundance in February (847 ind m -3 ) between March 2012 and February 2013 in the Southeastern Black Sea (Sen Ozdemir et al, 2017). We determined the highest lipid amount in the same season and sampling period for P. pileus (Figure 1).…”

Section: Resultsmentioning

confidence: 99%

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

Özdemir¹,

Feyzioğlu²,

Caf³

2021

EgeJFAS

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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.

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Section: Resultsmentioning

confidence: 99%

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

Özdemir¹,

Feyzioğlu²,

Caf³

2021

EgeJFAS

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“…The growth of fish growth can also be adversely affected by this (Norambuena et al, 2016). When aquatic organisms are exposed to high water temperatures, PUFAs increase and SFAs decrease (Şen Özdemir et al, 2017;Wije-koon et al, 2021). 18:3ω3, ALA is lost more with the increase in temperature (Turchini and Francis, 2009).…”

Section: The Most Effective Factors On Nutritional Quality Of C Macro...mentioning

confidence: 99%

Factors affecting nutritional quality in terms of the fatty acid composition of Cyprinion macrostomus

et al. 2023

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This study aimed to evaluate the effect of different factors (season, gender, location, total lipid, weight and length) on the fatty acid composition and nutritional quality of Cyprinion macrostomus. The results were evaluated through PERMANOVA, principal coordinates (PCO), and cluster analysis for similarity ranges. An analysis of similarity (ANOSIM) was performed on the distance matrix using multiple permutations within a significant fixed effect (p < 0.05). C18:1ω9, EPA and DHA were the most important fatty acids which had an effect on the nutritional quality in all the factor groups. Total lipid amount, season and length factors were the most influential on the fatty acid compositions of C. macrostomus. Summer and Spring were the best the periods for the good nutritional quality of C. macrostomus in terms of AI (Atherogenicity index), TI (Thrombogenicity index) and h/H (Σhypocholesterolemic/Σhypercholesterolemic fatty acid index). In addition, station, gender and weight had no effect on nutritional quality. The study indicated that C. macrostomus is a potential fish meat for human nutrition with high nutritional value in terms of fatty acid composition.

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Can the early stage copepad (Copepodites and Naupliies) abundance play important role on the fatty acid composition of Sagitta setosa (Chaetognatha) in the Southeastern Black Sea?

Özdemir¹,

Feyzioglu²,

Caf³

2020

EgeJFAS

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In this study, the relationship between the fatty acid composition, abundance of carnivore Sagitta setosa (S. setosa) and total copepod abundance (copepodites and nauplii) which are the main diets of S. setosa was investigated. Sampling was conducted monthly during a year. During the sampling period, S. setosa and the total the copepod abundance showed a parallel distribution until November. Average total lipid was at the highest with 3% in spring and autumn, while the lowest was 2% in winter and summer. While DHA/EPA ratio (2.23) as carnivory index in S. setosa and the total copepod (copepodites and nauplii) abundance (1375 ind/m3) were at the highest in winter, but another carnivory index, 18:1ω9/18:1ω7 ratio did not show a parallel increase with copepod abundance. However, 18:1ω9 which increases the carnivory index, is among the main fatty acids in S. setosa. This might be indicated that S. setosa does not related to predation on the copepods, but it shows that feeding in a carnivorous style. Additionally, the herbivory index ∑ n-3/∑ n-6 ratio was detected in spring and autumn at the highest level. Consequently, although there is no direct effect between the copepod abundance and S. setosa fatty acids, it is possible an indirect effect.

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Seasonal changes in abundance, lipid and fatty acid composition of Calanus euxinus in the South-eastern Black Sea

Cited by 4 publications

References 44 publications

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

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

Factors affecting nutritional quality in terms of the fatty acid composition of Cyprinion macrostomus

Can the early stage copepad (Copepodites and Naupliies) abundance play important role on the fatty acid composition of Sagitta setosa (Chaetognatha) in the Southeastern Black Sea?

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