Seasonal variation in lipid class and fatty acid composition of two small copepods in Balsfjorden, northern Norway

Norrbin, Fredrika; Olsen, Rolf Erik; Tande, Kurt S.

doi:10.1007/bf01344288

Cited by 81 publications

(42 citation statements)

References 28 publications

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“…The percentages of PUFA, such as EPA and DHA, in fish muscle are dependent on diet (Sargent 1997). Variations in fatty acid composition might be related to the changes in nutritional habits of the fish (Norrobin et al 1990). Other factors such as the size or age, reproductive status, geographic location, season, and temperature may influence the fatty acid composition of the fish muscle (Leger et al 1977;Alasalvar et al 2002).…”

Section: Discussionmentioning

confidence: 99%

Comparison of farmed and wild common carp (Cyprinus carpio): Seasonal variations in chemical composition and fatty acid profile

Shábanpour¹,

Hosseini²,

Imanpour³

et al. 2012

Czech J. Food Sci.

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Yeganeh S., Shabanpour B., Hosseini H., Imanpour M.R., Shabani A. (2012) Chemical composition and fatty acid profile of fillets from farmed and wild common carp were assessed in the course of four seasons. Ten wild and ten0 farmed fish were collected in the middle month of each season (except summer due to unavailability of wild fish) during the year. Lipid and protein contents of the samples decreased from summer to spring (protein: 17.6 ± 0.3-15.9 ± 1.6; 18.2 ± 0.1-17.9 ± 1.4%, in the farmed and wild carp samples, lipid (5.1 ± 0.2-1.5 ± 0.5; 3.8 ± 0.6-2.8 ± 0.9%, respectively; p > 0.05), moisture content of both samples increased in this period (76.7 ± 1.4-81.4 ± 0.4, 75.5 ± 0.6-78.5 ± 0.2 in the farmed and wild carp, respectively). Protein content of wild carp fillet was higher (17.7 ± 0.8% protein vs. and 16.2 ± 1.2%) and moisture content was lower than those of the farmed counterparts (77.65 ± 0.6 vs. and 79.3 ± 0.1, p < 0.05). In all seasons, MUFA were higher than SFA and also the PUFA. In the wild carp fillet, PUFA was higher than SFA in winter and spring but in the farmed carp it was higher in all seasons except the spring. Palmitic, oleic, and DHA were the major SFA, MUFA, and PUFA in the wild carp fillet, respectively. In the farmed carp fillet, the major SFA and MUFA were similar to those in the wild one but linoleic acid was the major PUFA in all seasons. ω-3/ω-6 PUFA ratios in the wild carp fillet were higher than in the farmed counterparts.

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Section: Discussionmentioning

confidence: 99%

Comparison of farmed and wild common carp (Cyprinus carpio): Seasonal variations in chemical composition and fatty acid profile

Shábanpour¹,

Hosseini²,

Imanpour³

et al. 2012

Czech J. Food Sci.

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“…was also observed in the White Sea (Pertsova 1981). Norrbin (Norrbin et al 1990;Norrbin 1996) suggested that it is less a continuous process, triggered by the physiological state as proposed by McLaren et al (1989), but rather a speciWc switching date, at which P. acuspes copepodids stop maturation but proceed to accumulate lipids. Klein Breteler and Gonzalez (1988) suspected that changes to poor food conditions are necessary to induce hormonal cessation of development in favor of lipid production.…”

Section: Onset Of Overwinteringmentioning

confidence: 99%

“…in Arctic regions (e.g. Pertsova 1981;McLaren et al 1989;Norrbin et al 1990;Norrbin 1991;Conover and Siferd 1993), with highest reproductive activities in spring, a successive accumulation of resting copepodite stages starting in early summer and a potential interposition of minor summer generations. This is supported by the corresponding lipid-storing strategies of P. acuspes.…”

Section: Onset Of Overwinteringmentioning

confidence: 99%

“…exhibits a primarily herbivorous feeding behavior (e.g. Schnack 1975;Corkett and McLaren 1978;Fraser et al 1989;Cotonnec et al 2001), whereas other studies suggested a more omnivorous feeding mode (Båmstedt et al 1990;Norrbin et al 1990;Peters et al 2004). To elucidate seasonal dynamics in diet we applied signature fatty acids to identify trophic relationships.…”

Section: Introductionmentioning

confidence: 99%

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Trophodynamics and seasonal cycle of the copepod Pseudocalanus acuspes in the Central Baltic Sea (Bornholm Basin): evidence from lipid composition

et al. 2006

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Seasonal lipid dynamics of the copepod Pseudocalanus acuspes were studied in the Bornholm Basin (Central Baltic Sea) on a monthly basis from March 2002 until March 2003 and were interpreted in light of life cycle strategies and diet selection. The individual total lipid content of females ranged from 0.9 to 1.8 g, with relative wax ester content reaching a signiWcant maximum in May (44% of total lipids) and minimum (17% of total lipids) in April and November. SigniWcant changes in size, lipid content, lipid classes and fatty acid composition of structural as well as storage lipids suggested Wve characteristic seasonal phases that were induced by diVerent feeding histories and environmental conditions. Storage lipids were characterized by 18:1(n¡9) as major component, which ranged between 44% of total fatty acids in June and 23% in February. The strong coherence between 18:1(n¡9) in the seston lipids and the occurrence of ciliates emphasized the importance of ciliates in the diet of P. acuspes. As indicated by changes in the amounts of fatty acid markers, other food sources varied over the year, suggesting an opportunistic feeding behavior. The spring period was characterized by an increase in typical diatom and dinoXagellate markers, whereas other sources, potentially cyanobacteria, became more important during summer. The life cycle strategy is discussed with respect to extant adaptations to high latitudinal habitats.

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“…The ability to ingest small-sized food particles could be an important advantage over large copepods, and perhaps a reason for the overwhelming numerical abundance of D. forcipatus in some areas of the southern Patagonian shelf. Opportunistic feeding must be a supplement to energy storage for smaller copepod species occurring at high latitudes because of their higher metabolic rates and the limitation of storage space (NORRBIN et al, 1990). Grazing during a previous temporal window may explain that higher abundances of nearly all copepodite stages appeared to be related to low concentrations of most potential food items.…”

Section: Drepanopus Forcipatusmentioning

confidence: 99%

FEEDING AND REPRODUCTIVE ACTIVITY OF THE COPEPODS Drepanopus forcipatus AND Calanus australis DURING LATE SUMMER ON THE SOUTHERN PATAGONIAN SHELF (ARGENTINA, 47°-55°S)

et al. 2014

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Drepanopus forcipatus and Calanus australis are key planktonic copepods on the southern Patagonian shelf. Their feeding and reproductive patterns and population status were investigated during late summer, when environmental conditions may be critical. The presence of food in the gut and food-pellet length were recorded in adult females and the most abundant copepodite stages. Diet composition was also studied in adult females. Female reproductive status was evaluated by gonad staging. Despite generally low feeding conditions and decreasing seasonal temperature, both copepods fed to some degree. The most numerous copepodites and adult females of both species showed similarly low feeding activity. About half of the adult females of the two species and C5s of C. australis contained food in their guts, but the proportion of fed C4-females of D. forcipatus was much lower. All copepods were generally feeding at low or intermediate levels. Gonad stage distribution and population structure showed low but still ongoing reproduction in both species. Gut content findings suggest a preference for smaller nanoplanktonic particles, especially dinoflagellates by D. forcipatus, and for autotrophic prey, particularly large diatoms by C. australis. The feeding and reproduction patterns of the two copepods were likely influenced by the distributions of potential food resources and temperature. RESUMODrepanopus forcipatus e Calanus australis são copépodos planctônicos relevantes na plataforma da Patagônia Austral. Seus padrões de alimentação, reprodução e status populacional foram investigados durante o fim do verão, quando as condições ambientais podem ser críticas. A presença de alimento no abdomen e o tamanho das pelotas alimentares foram registados em fêmeas adultas e nos estágios mais abundantes de copepodito. A composição da dieta também foi estudada em fêmeas adultas. O status reprodutivo das fêmeas foi avaliado através do estágio gonadal. De modo geral, apesar das baixas condições alimentares e diminuição sazonal da temperatura, ambos os copépodos se alimentaram. Os copepoditos mais numerosos e as fêmeas adultas de ambas espécies mostraram baixa atividade alimentar. Cerca de metade das fêmeas adultas das duas espécies e C5s de C. australis apresentaram alimento em seu intestino, porém a proporção de fêmeas D. forcipatus C4 alimentadas foi consideravelmente menor. De modo geral, todos os copépodos se alimentaram entre níveis baixo e intermediário. A distribuição do estágio gonadal e a estrutura populacional apresentaram reprodução baixa, mas contínua para ambas as espécies. Os alimentos encontrados no intestino sugerem uma preferência por partículas nanoplanctônicas, especialmente dinoflagelatos em D. forcipatus, e por presas autotróficas, particularmente grandes diatomáceas em C. australis. Os padrões de alimentação e reprodução dos dois copépodos foram provavelmente influenciados pela distribuição de recursos alimentares e temperatura.

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Seasonal variation in lipid class and fatty acid composition of two small copepods in Balsfjorden, northern Norway

Cited by 81 publications

References 28 publications

Comparison of farmed and wild common carp (Cyprinus carpio): Seasonal variations in chemical composition and fatty acid profile

Comparison of farmed and wild common carp (Cyprinus carpio): Seasonal variations in chemical composition and fatty acid profile

Trophodynamics and seasonal cycle of the copepod Pseudocalanus acuspes in the Central Baltic Sea (Bornholm Basin): evidence from lipid composition

FEEDING AND REPRODUCTIVE ACTIVITY OF THE COPEPODS Drepanopus forcipatus AND Calanus australis DURING LATE SUMMER ON THE SOUTHERN PATAGONIAN SHELF (ARGENTINA, 47°-55°S)

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