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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Turra, Alexander [1] ; Ragagnin, Marilia N. [1] ; McCarthy, Ian D. [2] ; Fernandez, Wellington S. [1]
Total Authors: 4
[1] Univ Sao Paulo, Oceanog Inst, BR-05508120 Sao Paulo, SP - Brazil
[2] Bangor Univ, Sch Ocean Sci, Menai Bridge LL59 5AB, Gwynedd - Wales
Total Affiliations: 2
Document type: Journal article
Web of Science Citations: 0

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)

FAPESP's process: 13/19826-6 - Influence of acidification on the population dynamics of Astropecten marginatus and Luidia senegalensis (Echinodermata: Asteroidea)
Grantee:Wellington Silva Fernandez
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 14/12879-0 - The effects of ocean acidification on Astropecten irregularis (Echinodermata: Asteroidea)
Grantee:Wellington Silva Fernandez
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 13/50197-5 - Tropical and temperate marine ecosystems: adapting to a changing world
Grantee:Alexander Turra
Support Opportunities: Regular Research Grants
FAPESP's process: 15/02727-0 - Effects of ocean acidification and shading on growth, exoskeleton calcification and behavior of hermit crabs
Grantee:Marilia Nagata Ragagnin
Support Opportunities: Scholarships in Brazil - Master