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Ecophysiology and trophic relationships of elasmobranchs: biomarkers as tools for conservation

Grant number: 17/25273-0
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): April 01, 2018
Effective date (End): August 31, 2022
Field of knowledge:Biological Sciences - Zoology - Physiology of Recent Groups
Principal researcher:Renata Guimarães Moreira Whitton
Grantee:Bianca de Sousa Rangel
Home Institution: Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated research grant:14/16320-7 - Impacts of climate/environmental change on the fauna: an integrative approach, AP.PFPMCG.TEM

Abstract

Throughout the life cycle, the animals deal with changes in nutritional status associated with changes in the diet, growth, reproduction and migration. Given the diversity in life-history, elasmobranchs become interesting models for the study of relationship between physiology and ecological interactions in the marine environment. Despite recent studies on ecological patterns and physiological differences in elasmobranchs, related to habitat use and phylogeny, very little is known about the effects of seasonal variations, reproduction and ontogeny in trophic interactions. Alternative methods, non-lethal, using trophic markers, as the fatty acids (FA) and stable isotope (SI), are well established to investigate trophic and metabolic aspects in consumers, enabling the integration of temporal information. This project will characterize the FA profile, associated with the isotopic signature and the sex steroid hormones in elasmobranchs from different life history strategies, in two regions of biological importance: (1) nursery area, in the coastal region of Bertioga, SP, Brazil, and (2) feeding area, on the southern coast of Florida, USA. Due to the scarcity of some species and the logistic difficulties, part of the samples will be incorporated into the monitoring and marking program of the University of Miami. The composition of FA and SI signature of nitrogen (´15N) and carbon (´13C) will be analyzed in tissue and plasma, checking individual and interspecific nutritional status. We intend, with these biomarkers, to identify resource partitioning among sympatric species over time, relating with the biological traits of each species (reproduction and habitat use), providing information of mesopredator and top predators for monitoring studies and evaluation of potential anthropic impacts. (AU)

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Scientific publications (6)
(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)
RANGEL, BIANCA DE SOUSA; MOREIRA, RENATA GUIMARAES; NIELLA, YURI VIEIRA; SULIKOWSKI, JAMES A.; HAMMERSCHLAG, NEIL. Metabolic and nutritional condition of juvenile tiger sharks exposed to regional differences in coastal urbanization. Science of The Total Environment, v. 780, . (17/25273-0, 14/16320-7)
RANGEL, BIANCA DE SOUSA; HAMMERSCHLAG, NEIL; MOREIRA, RENATA GUIMARAES. Urban living influences the nutritional quality of a juvenile shark species. Science of The Total Environment, v. 776, . (14/16320-7, 17/25273-0)
RANGEL, BIANCA DE SOUSA; SALMON, THIERRY; POSCAI, ALINE NAYARA; KFOURY, JR., JOSE ROBERTO; GRASSI RICI, ROSE ELI. Comparative investigation into the morphology of oral papillae and denticles of four species of lamnid and sphyrnid sharks. ZOOMORPHOLOGY, v. 138, n. 1, p. 127-136, . (16/09095-2, 17/25273-0)
RANGEL, BIANCA S.; HAMMERSCHLAG, NEIL; SULIKOWSKI, JAMES A.; MOREIRA, RENATA GUIMARAES. Physiological markers suggest energetic and nutritional adjustments in male sharks linked to reproduction. Oecologia, v. 196, n. 4, . (14/16320-7, 17/25273-0)
RANGEL, BIANCA DE SOUSA; HAMMERSCHLAG, NEIL; SULIKOWSKI, JAMES A.; MOREIRA, RENATA GUIMARAES. Dietary and reproductive biomarkers in a generalist apex predator reveal differences in nutritional ecology across life stages. MARINE ECOLOGY-PROGRESS SERIES, v. 664, p. 149-163, . (17/25273-0, 14/16320-7)
DE SOUSA RANGEL, BIANCA; DE CASTRO RIBEIRO, DOUGLAS; CHAGAS, JUMMA M. A.; SPADA, LUCAS; MOREIRA, RENATA G.; DA SILVA RIBEIRO, CRISTIELE. Effects of biological traits on capture-induced parturition in a freshwater stingray and perspectives for species management. Journal of Fish Biology, v. 97, n. 2, . (17/25273-0, 14/16320-7, 16/11736-6)

Please report errors in scientific publications list by writing to: cdi@fapesp.br.