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Bioenergetics of early life-history stages of the brachyuran crab Cancer setosus in response to changes in temperature

Bioenergetics of early life-history stages of the brachyuran crab Cancer setosus in response to changes in temperature
Bioenergetics of early life-history stages of the brachyuran crab Cancer setosus in response to changes in temperature
In many marine invertebrates, a latitudinal cline in egg size is considered an adaptive response to a decrease in temperature, and enhances the energetic fitness of their larvae at hatching. However, the amount of energy carried over from the egg to the larval stage depends on the metabolic efficiency of egg development. In the present study, eggs of the brachyuran crab Cancer setosus were sampled for their dry mass (DM), carbon (C), nitrogen (N), and fatty acid (FA) content throughout development from blastula stage until hatching of zoea 1-larvae at Antofagasta (23°S) and Puerto Montt 41°S (Chile) under different temperature treatments (12, 16 and 19 °C). Hatching zoea 1 larvae contained 60 ± 3% of the initial blastula egg C content, regardless of site or temperature. However, the ontogenetic decrease in egg C content was to a significantly higher extend based on the utilization of energy-rich FA at 12 °C (? 1.16 µg/egg) compared to the 19 °C treatments in Antofagasta and Puerto Montt (? 0.63 to ? 0.73 µg FA per egg). At 19 °C egg-metabolism was based to a substantial extend on protein, which allowed for the saving of energy-richer lipids. We conclude that the production of larger eggs with high FA content appears to be adaptive not only to fuel the larval development, but is also a response to the prolonged egg developmental times at lower temperatures.

Chile, Crustacea, Eggs, Elemental analysis, Fatty acids, Larvae
0022-0981
160-166
Fischer, Sönke
a5384b37-185f-4c2e-a757-275064e5fd46
Thatje, Sven
f1011fe3-1048-40c0-97c1-e93b796e6533
Graeve, Martin
c83adb85-419c-429a-a38b-3b002931c304
Paschke, Kurt
8b48eb0f-bfd2-408f-8786-789da08c3140
Kattner, Gerhard
6f56c1bf-5bdd-448a-88a9-35b828ef0d83
Fischer, Sönke
a5384b37-185f-4c2e-a757-275064e5fd46
Thatje, Sven
f1011fe3-1048-40c0-97c1-e93b796e6533
Graeve, Martin
c83adb85-419c-429a-a38b-3b002931c304
Paschke, Kurt
8b48eb0f-bfd2-408f-8786-789da08c3140
Kattner, Gerhard
6f56c1bf-5bdd-448a-88a9-35b828ef0d83

Fischer, Sönke, Thatje, Sven, Graeve, Martin, Paschke, Kurt and Kattner, Gerhard (2009) Bioenergetics of early life-history stages of the brachyuran crab Cancer setosus in response to changes in temperature. Journal of Experimental Marine Biology and Ecology, 374, 160-166. (doi:10.1016/j.jembe.2009.04.019).

Record type: Article

Abstract

In many marine invertebrates, a latitudinal cline in egg size is considered an adaptive response to a decrease in temperature, and enhances the energetic fitness of their larvae at hatching. However, the amount of energy carried over from the egg to the larval stage depends on the metabolic efficiency of egg development. In the present study, eggs of the brachyuran crab Cancer setosus were sampled for their dry mass (DM), carbon (C), nitrogen (N), and fatty acid (FA) content throughout development from blastula stage until hatching of zoea 1-larvae at Antofagasta (23°S) and Puerto Montt 41°S (Chile) under different temperature treatments (12, 16 and 19 °C). Hatching zoea 1 larvae contained 60 ± 3% of the initial blastula egg C content, regardless of site or temperature. However, the ontogenetic decrease in egg C content was to a significantly higher extend based on the utilization of energy-rich FA at 12 °C (? 1.16 µg/egg) compared to the 19 °C treatments in Antofagasta and Puerto Montt (? 0.63 to ? 0.73 µg FA per egg). At 19 °C egg-metabolism was based to a substantial extend on protein, which allowed for the saving of energy-richer lipids. We conclude that the production of larger eggs with high FA content appears to be adaptive not only to fuel the larval development, but is also a response to the prolonged egg developmental times at lower temperatures.

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Published date: 2009
Keywords: Chile, Crustacea, Eggs, Elemental analysis, Fatty acids, Larvae

Identifiers

Local EPrints ID: 65665
URI: http://eprints.soton.ac.uk/id/eprint/65665
ISSN: 0022-0981
PURE UUID: 0f375a68-d310-4788-b406-7003186f6b12

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Date deposited: 05 Mar 2009
Last modified: 28 Oct 2019 21:47

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Author: Sönke Fischer
Author: Sven Thatje
Author: Martin Graeve
Author: Kurt Paschke
Author: Gerhard Kattner

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