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Effect of ocean acidification on osmoregulation of the marine shrimp X.kroyeri

Grant number: 13/26815-0
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): May 01, 2014
Effective date (End): October 31, 2015
Field of knowledge:Biological Sciences - Physiology - Compared Physiology
Principal researcher:Alessandra da Silva Augusto
Grantee:Andressa Cristina Ramaglia da Mota
Home Institution: Universidade Estadual Paulista (UNESP). Campus Experimental do Litoral Paulista. São Vicente , SP, Brazil


The increased concentration of atmospheric CO2 has caused acidification of ocean waters. Models suggest a scenario in which the pH of the water surface can be reduced to 0.4 unit before and 0.7 unit 2100 to 2250. Although evolutionary processes have shown us numerous examples of adaptation to survival in a variety of habitats, consensus is the negative impact of climate change on vulnerable to ocean acidification bodies. Studies have shown that acidification can affect the physiological mechanisms related to acid base balance, energy balance osmoregulation, chemoreception, excretion, ingestion rate and others. In this context, this study intends to evaluate the effect of ocean acidification on the physiology of osmoregulation Xiphopenaeus kroyeri marine shrimp (Decapoda, Penaeidae), a species widely distributed in Brazil and having migratory pattern throughout the year which probably occurs due salinity variation. The osmoregulatory mechanisms of X. kroyeri will be investigated in animals kept for three days under normocapnia (pH: 8.0) or hypercapnia (pH: 7.3) in the salinities of 20, 25, 30, 35 and 40. Metabolism (by means of oxygen consumption), ammonia excretion, osmolality of the hemolymph and degree of hydration of the tissues will be evaluated. The study of aspects of the physiology of X. kroyeri will be important for understanding the effect of ocean acidification on marine biodiversity and fisheries could provide useful information because it is one of the major fisheries the São Paulo coast.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
RAMAGLIA, ANDRESSA CRISTINA; DE CASTRO, LEANDRO MANTOVANI; AUGUSTO, ALESSANDRA. Effects of ocean acidification and salinity variations on the physiology of osmoregulating and osmoconforming crustaceans. JOURNAL OF COMPARATIVE PHYSIOLOGY B-BIOCHEMICAL SYSTEMIC AND ENVIRONMENTAL, v. 188, n. 5, p. 729-738, . (14/16983-6, 13/26815-0)

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