The effect of ocean acidification on the intertidal hermit crab Pagurus criniticornis is not modulated by cheliped amputation and sex

Autor(es)

Turra, Alexander ^[1] ; Ragagnin, Marilia N. ^[1] ; McCarthy, Ian D. ^[2] ; Fernandez, Wellington S. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Oceanog Inst, BR-05508120 Sao Paulo, SP - Brazil

^[2] Bangor Univ, Sch Ocean Sci, Menai Bridge LL59 5AB, Gwynedd - Wales

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

Resumo

Impacts of the interactive effects of ocean acidification (OA) with other anthropogenic environmental stressors on marine biodiversity are receiving increasing attention in recent years. However, little is known about how organismal responses to OA may be influenced by common phenomena such as autotomy and sexual dimorphism. This study evaluated the long-term (120 days) combined effects of OA (pH 7.7), experimental cheliped amputation and sex on physiological stress (mortality, growth, number of molts, cheliped regeneration and startle response) and energy budget (lipid and calcium contents) in the intertidal sexually-dimorphic hermit crab Pagurus criniticornis. Crabs exposed to OA reduced survivorship (46%), molting frequency (36%) and lipid content (42%). Autotomised crabs and males molted more frequently (39% and 32%, respectively). Males presented higher regeneration (33%) and lower lipid content (24%). The few synergistic effects recorded did not indicate any clear pattern among treatments however, (1) a stronger reduction in lipid content was recorded in non-autotomised crabs exposed to low pH; (2) calcium content was higher in males than females only for autotomised crabs under control pH; and (3) autotomised females showed a proportionally slower activity recovery than autotomised males. Although our results suggest an effect of long-term exposure to low pH on the physiological stress and energy budget of Pagurus criniticomis, the physiological repertoire and plasticity associated with limb regeneration and the maintenance of dimorphism in secondary sexual characters may provide resilience to long-term exposure to OA. (AU)

• Processo FAPESP: 13/19826-6 - Influência da acidificação na dinâmica populacional de Astropecten marginatus e Luidia senegalensis (Echinodermata: Asteroidea)
• Beneficiário: Wellington Silva Fernandez
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• 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