Climate sensitivity: Can we identify bottlenecks during early development and its effects on subsequent larval stages in crustaceans and fish?


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Daniela.Storch [ at ] awi.de

Abstract

Environmental drivers such as temperature and CO2 have in effect on early live stages. This overview will show different sensitivities of eggs and early larvae of crustaceans and fish. We measured mortality, developmental time, oxygen consumption and heart beat to get a comprehensive overview about the performance of these life stages and effects on later stages. Our experiments show synergistic effects of ocean warming and acidification on eggs and hatching larvae of crustaceans and fish. Interestingly, crab larvae hatching from eggs that were incubated at high CO2 showed higher mortality and prolonged developmental time compared to eggs that were kept at ambient CO2. Embryonic survival (p = 0.015) and larval size at hatch (p < 0,01) were significantly reduced under high PCO2, especially towards unfavourably cold temperatures. In turn, respiration rates of developing embryos were significantly (p < 0.05) increased under high PCO2, suggesting higher energy demand due to e.g. increased acid-base regulation leaving less energy for larval growth. These experiments suggest that life history stages and transition phases with lowered physiological capacities will be most sensitive to ocean warming and acidification.



Item Type
Conference (Poster)
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Primary Division
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Not peer-reviewed
Publication Status
Published
Event Details
Society of Experimental Biology Annual Main Meeting, 30 Jun 2015 - 03 Jul 2015, Prague.
Eprint ID
43091
Cite as
Storch, D. (2015): Climate sensitivity: Can we identify bottlenecks during early development and its effects on subsequent larval stages in crustaceans and fish? , Society of Experimental Biology Annual Main Meeting, Prague, 30 June 2015 - 3 July 2015 .


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AQUAEXCEL TNA 0092/06/08/21


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