Reduced pH and elevated salinities affect the physiology of intertidal crab Minuca mordax (Crustacea, Decapoda)

Author(s)

Strefezza, Tayna Figueiredo ^[1] ; De Andrade, Isabel Marques ^[1] ; Augusto, Alessandra ^{[1, 2]}

Affiliation

^[1] Sao Paulo State Univ UNESP, Biosci Inst, Praca Infante Dom Henrique S-N, Parque Bitaru, BR-11330900 Sao Vicente, SP - Brazil

^[2] Sao Paulo State Univ UNESP CAUNESP, Jaboticabal - Brazil

• Document type: Journal article
• Source: MARINE AND FRESHWATER BEHAVIOUR AND PHYSIOLOGY; v. 52, n. 5, p. 241-254, SEP 3 2019.
• Web of Science Citations: 0

Abstract

Minuca mordax is a model for studies on ocean acidification and sea-level rise because lives in mangroves and riverbanks with low pH. We investigated the physiology of the crabs exposed to differents pH (6.5 and 5.8) and salinity (25, 30, 35, 40 45S). There was not mortality or alterations in the hypo-osmoregulation, suggesting that the factors did not affect salt absorption/secretion. Reduced pH changed metabolism, ammonia excretion, and hepatosomatic index in relation to the animals kept in control pH. At elevated salinities, metabolism increased when animals were kept in control pH, but it decreased when they were exposed to acidified pH. energy substrate, varied between proteins to a mixture of proteins and lipids. Important physiological parameters, related to the catabolism of amino acids and to the energy demand are changed and the consequences might include alterations in growth and reproduction due to the energy channeling to limiting processes of homeostasis. (AU)

• FAPESP's process: 14/16983-6 - Effects of ocean acidification and change of temperature and salinity on physiology of the fiddler crabs: a study in laboratory
• Grantee: Alessandra da Silva Augusto
• Support Opportunities: Research Program on Global Climate Change - Regular Grants