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Macroevolutionary implications of osmotic, thermal and metabolic homeostasis in inter-tidal, neotropical crabs

Grant number: 11/22537-0
Support Opportunities:Regular Research Grants
Duration: March 01, 2012 - August 31, 2014
Field of knowledge:Biological Sciences - Physiology - Compared Physiology
Principal Investigator:John Campbell McNamara
Grantee:John Campbell McNamara
Host Institution: Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (FFCLRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil
Associated researchers: Carolina Arruda de Oliveira Freire ; Luciana Rodrigues de Souza Bastos ; Rogério Oliveira Faleiros


Abiotic environmental parameters like temperature, pO2 and pCO2, pH, water availability and salinity often vary daily, seasonally and/or latitudinally to different degrees. Homeostasis at the organismal level underpins the occupation of habitats characterized both by cyclic alterations in these parameters and by the extreme values attained, as seen in intertidal zones, estuaries and rocky coasts, from the tropics to temperate and sub-polar regions. The physiological mechanisms underlying such organismal homeostasis act at all levels of biological organization, from the subcellular to the systemic, and include processes characteristic of each structural level such as alterations in respiratory metabolism, intracellular isosmotic and extracellular anisosmotic regulation, and alterations in the expression of transport and thermal shock proteins. The present investigation will evaluate at the systemic, biochemical and molecular levels, the thermal, metabolic and osmoregulatory processes that sustain homeostasis in a eubrachyuran crab clade, aiming to appreciate the evolutionary physiology underpinning the diversification of this group into distinct thermal and osmotic niches. The species to be used pertain to four typical intertidal crab families that exhibit a vertical distribution between the low and high tide marks, and a tropical to sub-polar latitudinal distribution. In the laboratory, the crabs will be subjected to controlled conditions of temperature and salinity, and various level-specific biological parameters will be measured: mass-specific oxygen consumption and carbon dioxide production; kinetic (Km) and catalytic properties (kcat) of the enzyme LDH in muscle and gill, in addition to LDH mRNA expression; activity and mRNA expression of the gill ion transporters Na+/K+- and V(H+)-ATPase, and expression of the gill Na+/K+/2Cl- symporter; and mRNA expression and quantification of the thermal shock protein hsp70. The data will be evaluated using comparative phylogenetic methods, focusing on the physiological transformations that have arisen during the evolution of the Eubrachyura and on the macroevolutionary implications of thermal, metabolic and osmotic homeostasis regarding the diversification of habitats occupied by this taxon. (AU)

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Scientific publications (9)
(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)
FARIA, SAMUEL COELHO; BIANCHINI, ADALTO; LAUER, MARIANA MACHADO; RIBEIRO LATORRE ZIMBARDI, ANA LUCIA; TAPELLA, FEDERICO; CAROLINA ROMERO, MARIA; MCNAMARA, JOHN CAMPBELL. Living on the Edge: Physiological and Kinetic Trade-Offs Shape Thermal Tolerance in Intertidal Crabs From Tropical to Sub-Antarctic South America. FRONTIERS IN PHYSIOLOGY, v. 11, . (11/22537-0)
MCNAMARA, JOHN CAMPBELL; FREIRE, CAROLINA ARRUDA. Strategies of Invertebrate Osmoregulation: An Evolutionary Blueprint for Transmuting into Fresh Water from the Sea. INTEGRATIVE AND COMPARATIVE BIOLOGY, v. N/A, p. 12-pg., . (15/00131-3, 13/23906-5, 07/04870-9, 11/22537-0, 10/17534-0)
CAPPARELLI, V, M.; MCNAMARA, J. C.; GROSELL, M. G.. Tissue Accumulation and the Effects of Long-Term Dietary Copper Contamination on Osmoregulation in the Mudflat Fiddler Crab Minuca rapax (Crustacea, Ocypodidae). Bulletin of Environmental Contamination and Toxicology, v. 104, n. 6, . (11/22537-0, 11/08065-9, 13/10672-6)
CAPPARELLI, MARIANA V.; ABESSA, DENIS M.; MCNAMARA, JOHN C.. Effects of metal contamination in situ on osmoregulation and oxygen consumption in the mudflat fiddler crab Uca rapax (Ocypodidae, Brachyura). COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY, v. 185, p. 102-111, . (11/08065-9, 11/22537-0)
FARIA, SAMUEL C.; FALEIROS, ROGERIO O.; BRAYNER, FABIO A.; ALVES, LUIZ C.; BIANCHINI, ADALTO; ROMERO, CAROLINA; BURANELLI, RAQUEL C.; MANTELATTO, FERNANDO L.; MCNAMARA, JOHN C.. Macroevolution of thermal tolerance in intertidal crabs from Neotropical provinces: A phylogenetic comparative evaluation of critical limits. ECOLOGY AND EVOLUTION, v. 7, n. 9, p. 3167-3176, . (11/08852-0, 11/22537-0, 10/50188-8)
CAPPARELLI, MARIANA VELLOSA; BORDON, ISABELLA C.; ARAUJO, GIULIANA; GUSSO-CHOUERI, PALOMA KACHEL; DE SOUZA ABESSA, DENIS MOLEDO; MCNAMARA, JOHN CAMPBELL. Combined effects of temperature and copper on oxygen consumption and antioxidant responses in the mudflat fiddler crab Minuca rapax (Brachyura, Ocypodidae). COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY, v. 223, p. 35-41, . (11/22537-0, 11/08065-9)
VELLOSA CAPPARELLI, MARIANA; KACHEL GUSSO-CHOUERI, PALOMA; DE SOUZA ABESSA, DENIS MOLEDO; MCNAMARA, JOHN CAMPBELL. Seasonal environmental parameters influence biochemical responses of the fiddler crab Minuca rapax to contamination in situ. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY, v. 216, p. 93-100, . (11/08065-9, 11/22537-0)
CAPPARELLI, M. V.; MCNAMARA, J. C.; ARAUJO, G. S.; CRUZ, A. C. F.; ABESSA, D. M. S.. Use of an Integrated Geochemical and Ecotoxicological Approach to Evaluate Sediment Metal Contamination in Three Protected Estuarine Areas Along the Coast of Sao Paulo State, Brazil. Bulletin of Environmental Contamination and Toxicology, v. 106, n. 2, . (11/08065-9, 11/22537-0)

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