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  4. Life-history traits of the copepods Pseudocalanus minutus (Calanoida) and Oithona similis (Cyclopoida) in the Arctic Kongsfjorden (Svalbard) with particular emphasis on seasonality
 
Zitierlink URN
https://nbn-resolving.de/urn:nbn:de:gbv:46-diss000105636

Life-history traits of the copepods Pseudocalanus minutus (Calanoida) and Oithona similis (Cyclopoida) in the Arctic Kongsfjorden (Svalbard) with particular emphasis on seasonality

Veröffentlichungsdatum
2006-11-24
Autoren
Lischka, Silke  
Betreuer
Hagen, Wilhelm  
Gutachter
Schiel, Sigrid  
Zusammenfassung
The life-history traits of the copepods Pseudocalanus minutus (Calanoida) and Oithona similis (Cyclopoida) were investigated in the Arctic Kongsfjorden (Svalbard). In November, both species exhibited maximum abundances (P. minutus: 111,297 and O. similis: 704,633 ind m2), whereas minima occurred in June (1,088 and 4,483 ind m2, respectively). High levels of diatom marker fatty acids (16:1(n-7), 16:4(n-1), 20:5(n-3)) as well as high trypsin activities showed that the diatom bloom in spring was of specific importance for adult females and stage V copepodids of P. minutus to fuel final maturation processes and reproduction in May/June. O. similis generally followed an omnivorous feeding mode as indicated by consistently high amounts of the 18:1(n-9) fatty acid and the general predominance of the (dino-)flagellate biomarker 22:6(n-3). The first reproductive peak in June was primarily fueled by lipid reserves (wax esters), whereas the second reproductive peak in August/September co-occurred with energy storage for overwintering.
Schlagwörter
Life-history traits

; 

copepods

; 

Pseudocalanus minutus

; 

Oithona similis

; 

Arctic

; 

Kongsfjord

; 

Svalbard

; 

Spitsbergen

; 

seasonality

; 

abundance

; 

lipids

; 

fatty acid composition

; 

digestive enzymes

; 

trypsin)
Institution
Universität Bremen  
Fachbereich
Fachbereich 02: Biologie/Chemie (FB 02)  
Dokumenttyp
Dissertation
Zweitveröffentlichung
Nein
Sprache
Englisch
Dateien
Lade...
Vorschaubild
Name

00010563.pdf

Size

17.37 MB

Format

Adobe PDF

Checksum

(MD5):7f2667231569b04e95ca39d9e2786b10

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