Egg production and lipid content of Calanus glacialis in spring: indication of a food-dependent and food-independent reproductive mode
Female Calanus glacialis were collected in early May 1989 in the pack ice region of the western Barents Sea and were fed or starved over 11 wk. Both groups laid eggs continuously during this period, however, fed females laid up to six times more eggs. During the first 10 d after collection, both gro...
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ftawi:oai:epic.awi.de:1402 2024-09-15T17:57:55+00:00 Egg production and lipid content of Calanus glacialis in spring: indication of a food-dependent and food-independent reproductive mode Hirche, Hans-Jürgen Kattner, Gerhard 1993 https://epic.awi.de/id/eprint/1402/ https://hdl.handle.net/10013/epic.11993 unknown Hirche, H. J. and Kattner, G. (1993) Egg production and lipid content of Calanus glacialis in spring: indication of a food-dependent and food-independent reproductive mode , Marine Biology, 117 , pp. 615-622 . hdl:10013/epic.11993 EPIC3Marine Biology, 117, pp. 615-622 Article isiRev 1993 ftawi 2024-06-24T03:53:34Z Female Calanus glacialis were collected in early May 1989 in the pack ice region of the western Barents Sea and were fed or starved over 11 wk. Both groups laid eggs continuously during this period, however, fed females laid up to six times more eggs. During the first 10 d after collection, both groups spawned at low rates. Thereafter, fed females strongly increased spawning rates and maintained high egg production levels over 11 wk, while the rates of starved females decreased. During starvation they lost 70% body carbon, 50% body nitrogen and 70% lipids. The wax ester portion decreased from 86 to ca. 60% of total lipids. Three phases of gonad development and lipid metabolism were distinguished: early gonad development; gonad maturation with a rapid decrease in lipids, especially wax esters; and spawning under fed and starved conditions, where in fed females food provided most of the energy, whereas in starved females the lipid content strongly decreased. Article in Journal/Newspaper Barents Sea Calanus glacialis Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Female Calanus glacialis were collected in early May 1989 in the pack ice region of the western Barents Sea and were fed or starved over 11 wk. Both groups laid eggs continuously during this period, however, fed females laid up to six times more eggs. During the first 10 d after collection, both groups spawned at low rates. Thereafter, fed females strongly increased spawning rates and maintained high egg production levels over 11 wk, while the rates of starved females decreased. During starvation they lost 70% body carbon, 50% body nitrogen and 70% lipids. The wax ester portion decreased from 86 to ca. 60% of total lipids. Three phases of gonad development and lipid metabolism were distinguished: early gonad development; gonad maturation with a rapid decrease in lipids, especially wax esters; and spawning under fed and starved conditions, where in fed females food provided most of the energy, whereas in starved females the lipid content strongly decreased. |
format |
Article in Journal/Newspaper |
author |
Hirche, Hans-Jürgen Kattner, Gerhard |
spellingShingle |
Hirche, Hans-Jürgen Kattner, Gerhard Egg production and lipid content of Calanus glacialis in spring: indication of a food-dependent and food-independent reproductive mode |
author_facet |
Hirche, Hans-Jürgen Kattner, Gerhard |
author_sort |
Hirche, Hans-Jürgen |
title |
Egg production and lipid content of Calanus glacialis in spring: indication of a food-dependent and food-independent reproductive mode |
title_short |
Egg production and lipid content of Calanus glacialis in spring: indication of a food-dependent and food-independent reproductive mode |
title_full |
Egg production and lipid content of Calanus glacialis in spring: indication of a food-dependent and food-independent reproductive mode |
title_fullStr |
Egg production and lipid content of Calanus glacialis in spring: indication of a food-dependent and food-independent reproductive mode |
title_full_unstemmed |
Egg production and lipid content of Calanus glacialis in spring: indication of a food-dependent and food-independent reproductive mode |
title_sort |
egg production and lipid content of calanus glacialis in spring: indication of a food-dependent and food-independent reproductive mode |
publishDate |
1993 |
url |
https://epic.awi.de/id/eprint/1402/ https://hdl.handle.net/10013/epic.11993 |
genre |
Barents Sea Calanus glacialis |
genre_facet |
Barents Sea Calanus glacialis |
op_source |
EPIC3Marine Biology, 117, pp. 615-622 |
op_relation |
Hirche, H. J. and Kattner, G. (1993) Egg production and lipid content of Calanus glacialis in spring: indication of a food-dependent and food-independent reproductive mode , Marine Biology, 117 , pp. 615-622 . hdl:10013/epic.11993 |
_version_ |
1810434141004496896 |