José Eduardo Amoroso Rodriguez Marian in research grants and scholarships supported by FAPESP.
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The 'Mesozoic Marine Revolution' (MMR) refers to the dramatic reorganization of marine ecosystems that occurred during the Mesozoic and gave rise to the modern structure of our oceans. Increased primary productivity during the MMR permitted the diversification of predatory lineages, which in turn exerted strong selective pressures on their prey, promoting increasingly defensive adaptation…
Cephalopods are potentially interesting models for studies on evolutionary convergences, as suggested by recent investigations of spermatophore transfer strategies in Decapodiformes (e.g., cuttlefishes and squids). It is hypothesized that the evolution of these strategies were biased by historical transitions between marine habitats, due to the presence of similar strategies in distantly …
Sensory systems include different genetic, molecular and morphological components that allow animals to interact with the surrounding environment. The investigation of such systems is critical to elucidate functional and adaptive hypotheses, as well as evolutionary mechanisms. In all animals, chemoreceptors and opsins are G-Protein Coupled Receptors (GPCRs) that sense chemical signs and l…
Cephalopods exhibit a great diversity of reproductive strategies, and understanding these attributes is crucial for comprehending the role of sexual selection in the clade's diversification. Squids from the family Loliginidae are particularly interesting in this context, as they possess a complex mating system that includes alternative reproductive tactics in males. Large males (consorts)…
An essential aspect of the evolution of coleoid cephalopods is the diversification of egg-laying strategies. In decapodiforms (e.g., squid and cuttlefish), for example, the egg masses are structurally complex and mostly benthic. However, in the suborder Oegopsida, which includes oceanic squid, eggs are either pelagic or brooded in the female's arms. Therefore, in an essentially nektonic c…
Sexual selection influences the reproductive success of each individual and it is not limited to competition for access to the opposite sex. In species in which females copulate with several males during the reproductive period, the paternity dispute can occur even after copulation, through sperm competition and female cryptic choice. Loliginidae squids exhibit complex sexual behaviors an…
(Only some records are available in English at this moment)
Decapodiform cephalopods (e.g., squid, cuttlefish, pygmy squid, bobtail squid) represent an interesting group for the study of the evolution of fertilization mechanisms in aquatic animals, due to their unique type of fertilization ("confined external fertilization"). In this clade, fertilization probably takes place during egg encapsulation, as the forming egg capsule travels through sper…
Cephalopods exhibit a great diversity of reproductive strategies, and understanding these traits is essential to comprehend the role of sexual selection in the diversification of the clade. Squids of the family Loliginidae are particularly interesting in this context, as they have a complex mating system, including male alternative reproductive tactics. Large males (consorts) and small ma…
Eyes provide a tractable system to study how molecular and morphological traits can jointly result in new functions. For instance, visual adaptations frequently result from combinations of opsin-based photopigments and optical components. However, our understanding is limited by eye anatomy and opsin expression data which are missing for many invertebrate visual systems. Bivalve mollusks …
The bivalve mantle margin comprises the free portion of the pallial lobes and often bears muscular, sensory or secretory structures located on extensions, called mantle folds. In the bivalve Infraclass Pteriomorphia, which underwent an extensive adaptive radiation in epifaunal habitats, the mantle margin exhibits an enormous diversity in mantle fold organization and associated structures.…
Sexual selection has a crucial role in the evolution of reproductive traits. Males use several strategies to ensure fertilization, but females also play a major role in pre and post-copulatory processes. Cephalopods transfer sperm packed within spermatophores, and in some cases females bear specialized organs for sperm storage (i.e., seminal receptacles). However, the morphology of these …
| 1 / 1 | Ongoing grants |
| 4 / 1 | Completed research grants |
| 2 / 2 | Ongoing scholarships in Brazil |
| 8 / 7 | Completed scholarships in Brazil |
| 2 / 2 | Ongoing scholarships abroad |
| 3 / 3 | Completed scholarships abroad |
| 20 / 16 | All research grants and scholarships |
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