Feeding ecology and metabolism of the Antarctic cydippid ctenophore Callianira antarctica

Clearance rates, ingestion rates and daily rations of the tentaculate ctenophore Callianira sp. were measured during in vitro incubations on board the RV Polarstern in the Eastern Bellingshausen Sea during April and May 2001. Calanoid copepods, larval Antarctic krill Euphausia superba and their mixt...

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Bibliographic Details
Main Authors: Scolardi, K. M., Daly, K. L., Pakhomov, E. A., Torres, J. J.
Format: Article in Journal/Newspaper
Language:unknown
Published: 2006
Subjects:
Antarctic
Bellingshausen Sea
The Antarctic
Antarc*
Antarctic Krill
Antarctica
Euphausia superba
Copepods
Online Access:https://epic.awi.de/id/eprint/5752/
https://hdl.handle.net/10013/epic.16315
Description
Summary:Clearance rates, ingestion rates and daily rations of the tentaculate ctenophore Callianira sp. were measured during in vitro incubations on board the RV Polarstern in the Eastern Bellingshausen Sea during April and May 2001. Calanoid copepods, larval Antarctic krill Euphausia superba and their mixture were offered to ctenophores during incubations. The ingestion rates of Callianira sp. were linearly related to prey densities expressed as numbers, carbon and nitrogen mass. Both copepods and krill furcilia were consumed with nearly similar rates. Ingestion rates ranged from 9 to 39 prey.ind-1d-1 (mean 20.4±11.6 prey.ind-1d-1, n = 6) and from 3.5 to 4.0 prey.ind-1d-1 (3.7±0.3 prey.ind-1d-1, n = 3) for large (body mass 3.3 mgC) and small (2.4 mgC) Callianira sp., respectively. Daily rations of large Callianira sp. at different prey concentrations varied between 22% and 136% of body C, while daily rations of small Callianira sp. ranged from 6 to 22% of body C.

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