Elevated pCO(2) does not impair performance in autotomised individuals of the intertidal predatory starfish Asterias rubens (Linnaeus, 1758)

Autor(es)

McCarthy, Ian D. ^[1] ; Whiteley, Nia M. ^[2] ; Fernandez, Wellington S. ^[3] ; Ragagnin, Marilia N. ^[3] ; Cornwell, Tomas O. ^[1] ; Suckling, Coleen C. ^[4] ; Turra, Alexander ^[3]

Afiliação do(s) autor(es)

^[1] Bangor Univ, Sch Ocean Sci, Menai Bridge LL59 5AB, Anglesey - Wales

^[2] Bangor Univ, Sch Nat Sci, Bangor LL57 2UW, Gwynedd - Wales

^[3] Univ Sao Paulo, Oceanog Inst, BR-05508120 Sao Paulo, SP - Brazil

^[4] Univ Rhode Isl, Sch Fisheries Anim & Vet Sci, Kingston, RI 02881 - USA

• Tipo de documento: Artigo Científico
• Fonte: MARINE ENVIRONMENTAL RESEARCH; v. 153, JAN 2020.
• Citações Web of Science: 0

Resumo

The impacts of ocean acidification remain less well-studied in starfish compared to other echinoderm groups. This study examined the combined effects of elevated pCO(2) and arm regeneration on the performance of the intertidal predatory starfish Asterias rubens, as both are predicted to come at a cost to the individual. A two-way factorial experiment (similar to 400 mu atm vs similar to 1000 mu atm; autotomised vs non-automised individuals) was used to examine growth rates, lipid content (pyloric caeca and gonads), and calcium content (body wall) in both intact and regenerating arms, as well as subsequent effects on rate of arm regeneration, righting time (behaviour) and mortality over 120 days. Autotomised individuals tended to show lower (not significant), survival and growth. Elevated pCO(2) had no effect on mortality, body growth, arm regeneration, righting time or arm calcium content. Lipid content was higher in the pyloric caeca, but not in the gonads, in response to elevated pCO(2) irrespective of autotomisation. The results of the study suggest that adult A. rubens remain unaffected by increased pCO(2) and/or arm autotomy for 120 days, although longer term experiments are necessary as the results indicated that survival, growth and calcification may be impaired with longer-term exposure to elevated pCO(2). (AU)

• Processo FAPESP: 14/12879-0 - Efeitos da acidificação oceânica em Astropecten irregularis (Echinodermata: Asteroidea)
• Beneficiário: Wellington Silva Fernandez
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• Processo FAPESP: 13/50197-5 - Tropical and temperate marine ecosystems: adapting to a changing world
• Beneficiário: Alexander Turra
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 15/02727-0 - Efeitos da acidificação oceânica e sombreamento sobre o crescimento, calcificação do exoesqueleto e comportamento de ermitões
• Beneficiário: Marilia Nagata Ragagnin
• Modalidade de apoio: Bolsas no Brasil - Mestrado