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Parental exposure to elevated pCO2 influences the reproductive success of copepods

Parental exposure to elevated pCO2 influences the reproductive success of copepods
Parental exposure to elevated pCO2 influences the reproductive success of copepods
Substantial variations are reported for egg production and hatching rates of copepods exposed to elevated carbon dioxide concentrations (pCO2). One possible explanation, as found in other marine taxa, is that prior parental exposure to elevated pCO2 (and/or decreased pH) affects reproductive performance. Previous studies have adopted two distinct approaches, either (1) expose male and female copepoda to the test pCO2/pH scenarios, or (2) solely expose egg-laying females to the tests. Although the former approach is more realistic, the majority of studies have used the latter approach. Here, we investigated the variation in egg production and hatching success of Acartia tonsa between these two experimental designs, across five different pCO2 concentrations (385–6000 µatm pCO2). In addition, to determine the effect of pCO2 on the hatching success with no prior parental exposure, eggs produced and fertilized under ambient conditions were also exposed to these pCO2 scenarios. Significant variations were found between experimental designs, with approach (1) resulting in higher impacts; here >20% difference was seen in hatching success between experiments at 1000 µatm pCO2 scenarios (2100 year scenario), and >85% at 6000 µatm pCO2. This study highlights the potential to misrepresent the reproductive response of a species to elevated pCO2 dependent on parental exposure.
elevated pCO2, copepods, parental exposure, egg hatching, rates spermatogenesis ocean acidification
0142-7873
1165-1174
Cripps, Gemma
bb69f201-11cb-4b34-85b3-81720e0b6554
Lindeque, Penelope
13334439-fed2-43e0-9c21-3df94d69f963
Flynn, Kevin
df344440-de54-4adb-98e1-e176b05991b0
Cripps, Gemma
bb69f201-11cb-4b34-85b3-81720e0b6554
Lindeque, Penelope
13334439-fed2-43e0-9c21-3df94d69f963
Flynn, Kevin
df344440-de54-4adb-98e1-e176b05991b0

Cripps, Gemma, Lindeque, Penelope and Flynn, Kevin (2014) Parental exposure to elevated pCO2 influences the reproductive success of copepods. Journal of Plankton Research, 36 (5), 1165-1174. (doi:10.1093/plankt/fbu052).

Record type: Article

Abstract

Substantial variations are reported for egg production and hatching rates of copepods exposed to elevated carbon dioxide concentrations (pCO2). One possible explanation, as found in other marine taxa, is that prior parental exposure to elevated pCO2 (and/or decreased pH) affects reproductive performance. Previous studies have adopted two distinct approaches, either (1) expose male and female copepoda to the test pCO2/pH scenarios, or (2) solely expose egg-laying females to the tests. Although the former approach is more realistic, the majority of studies have used the latter approach. Here, we investigated the variation in egg production and hatching success of Acartia tonsa between these two experimental designs, across five different pCO2 concentrations (385–6000 µatm pCO2). In addition, to determine the effect of pCO2 on the hatching success with no prior parental exposure, eggs produced and fertilized under ambient conditions were also exposed to these pCO2 scenarios. Significant variations were found between experimental designs, with approach (1) resulting in higher impacts; here >20% difference was seen in hatching success between experiments at 1000 µatm pCO2 scenarios (2100 year scenario), and >85% at 6000 µatm pCO2. This study highlights the potential to misrepresent the reproductive response of a species to elevated pCO2 dependent on parental exposure.

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Published date: October 2014
Keywords: elevated pCO2, copepods, parental exposure, egg hatching, rates spermatogenesis ocean acidification
Organisations: Ocean and Earth Science

Identifiers

Local EPrints ID: 373518
URI: http://eprints.soton.ac.uk/id/eprint/373518
ISSN: 0142-7873
PURE UUID: d198b567-6549-4d12-b93c-de5030dcd00b

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Date deposited: 20 Jan 2015 14:07
Last modified: 07 Oct 2019 18:29

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