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Evolution of sperm transfer mechanisms in cephalopods: adaptative convergences associated with habitat shifts in the marine environment?

Grant number: 13/02653-1
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): June 01, 2013
Effective date (End): January 31, 2014
Field of knowledge:Biological Sciences - Zoology - Morphology of Recent Groups
Principal researcher:Antonio Carlos Marques
Grantee:José Eduardo Amoroso Rodriguez Marian
Home Institution: Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated research grant:11/50242-5 - Dimensions of marine life: patterns and process of diversifications in planktonic and benthic cnidarians, AP.BTA.TEM

Abstract

Studies on evolutionary convergences can provide important insights for understanding the factors that influence evolution. To contribute to the understanding of the patterns and processes involved in metazoan evolution and diversification in the marine environment, this study aims to investigate evolutionary convergences potentially associated with marine habitat shifts, using the class Cephalopoda as a model group. To achieve the proposed goal, we will investigate cephalopod sperm transfer mechanisms, some of which have been proposed as potentially convergent and correlated with habitat. First, organs and structures responsible for sperm transfer will be subject of functional morphology studies, aiming at the understanding of the mechanisms involved in spermatophore transfer, implantation, and storage. These analyses will include histological and electron microscopy techniques, and in vitro experimentation. This study aims also to provide a reasonable bulk of morphological data related to cephalopod reproductive strategies to allow the identification of putative homologous structures. Ancestral states for these characters will be reconstructed to attempt to identify characters that have arisen via convergent evolution. These will then be assessed for correlation with habitat, also using a phylogenetic context. Based on these results, adaptive hypotheses will then be inferred, tested and discussed. (AU)

Scientific publications (5)
(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)
ANDERSON, FRANK E.; MARIAN, JOSE EDUARDO A. R. The grass squid Pickfordiateuthis pulchella is a paedomorphic loliginid. Molecular Phylogenetics and Evolution, v. 147, JUN 2020. Web of Science Citations: 0.
APOSTOLICO, LIGIA HASELMANN; AMOROSO RODRIGUEZ MARIAN, JOSE EDUARDO. Cephalopod mating systems as models for the study of sexual selection and alternative reproductive tactics: a review. BULLETIN OF MARINE SCIENCE, v. 96, n. 2, SI, p. 375-398, APR 2020. Web of Science Citations: 1.
MARIAN, JOSE E. A. R.; APOSTOLICO, LIGIA H.; CHIAO, CHUAN-CHIN; HANLON, ROGER T.; HIROHASHI, NORITAKA; IWATA, YOKO; MATHER, JENNIFER; SATO, NORIYOSI; SHAW, PAUL W. Male Alternative Reproductive Tactics and Associated Evolution of Anatomical Characteristics in Loliginid Squid. FRONTIERS IN PHYSIOLOGY, v. 10, OCT 15 2019. Web of Science Citations: 0.
HOVING, H. J. T.; ARKHIPKIN, A. I.; LAPTIKHOVSKY, V. V.; MARIAN, J. E. A. R. Mating tactics in the sub-Antarctic deep-sea squid Onykia ingens (Cephalopoda: Onychoteuthidae). POLAR BIOLOGY, v. 39, n. 7, p. 1319-1328, JUL 2016. Web of Science Citations: 2.
AMOROSO RODRIGUEZ MARIAN, JOSE EDUARDO. Evolution of spermatophore transfer mechanisms in cephalopods. Journal of Natural History, v. 49, n. 21-24, SI, p. 1423-1455, APR 30 2015. Web of Science Citations: 7.

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