Sofia Rizzi

Sofia Rizzi
University of Greifswald · Applied Zoology and Nature Conservation Group

Master of Science

About

10
Publications
1,893
Reads
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22
Citations
Citations since 2016
10 Research Items
22 Citations
201620172018201920202021202202468
201620172018201920202021202202468
201620172018201920202021202202468
201620172018201920202021202202468
Additional affiliations
March 2020 - present
University of Greifswald
Position
  • PhD Student
Education
October 2016 - November 2018
University of Padova
Field of study
  • Evolutionary Biology
October 2013 - December 2016
University of Padova
Field of study
  • Natural Sciences

Publications

Publications (10)
Article
Full-text available
Integrating information on species-specific sensory perception with spatial activity provides a high-resolution understanding of how animals explore environments, yet frequently used exploration assays commonly ignore sensory acquisition as a measure for exploration. Echolocation is an active sensing system used by hundreds of mammal species, prima...
Article
Full-text available
Sociality is a fundamental organizing principle across taxa, thought to come with a suite of adaptive benefits. However, making causal inferences about these adaptive benefits requires experimental manipulation of the social environment, which is rarely feasible in the field. Here we manipulated the number of conspecifics in Trinidadian guppies (Po...
Preprint
Full-text available
Integrating information on species-specific sensory perception together with spatial activity provides a high-resolution understanding of how animals explore environments, yet frequently used exploration assays commonly ignore sensory acquisition as a measure for exploration. Echolocation is an active sensing system used by hundreds of mammal speci...
Preprint
Full-text available
Sociality is a fundamental organizing principle across taxa, thought to come with a suite of adaptive benefits. However, making causal inferences about these adaptive benefits requires experimental manipulation of the social environment, which is rarely feasible in the field. Here we manipulated the number of conspecifics in Trinidadian guppies (Po...
Article
Full-text available
In polyandrous species males invest significant resources in producing large and high-quality ejaculates. As ejaculates are costly, males are expected to modulate their investment in response to social cues associated with the expected level of sperm competition or mating opportunity, to anticipate future mating conditions. Another consequence of e...
Article
Full-text available
Sexually selected traits involved in mate acquisition and fertilization success are usually costly and males often plastically adjust their reproductive investment in response to social conditions. Phenotypic plasticity in male sexual traits is generally assumed to be adap-tive, yet its costs are rarely investigated. Male guppies (Poecilia reticula...
Poster
Full-text available
Phenotypic plasticity, i.e. the ability of an organism to produce different phenotypes in response to environmental conditions, in male sexual traits is nearly universal and generally assumed to be adaptive. For example, socio-sexual conditions are often variable in natural populations, and males adjust accordingly their reproductive investment in...
Presentation
Full-text available
Presentation regarding a study on the costs of phenotypic plasticity of male reproductive traits. The study was conducted with the guppy (Poecilia reticulata).
Poster
Full-text available
A good acquaintance with the fundamental evolutionary patterns and processes is considered essential for any biologist and for laypeople as well. Therefore, correct understanding and communication about evolutionary themes should play a central role in modern scientific education and awareness. Wikipedia is probably the largest reference work on th...

Questions

Question (1)
Question
Hi all,
I'm new to the field, so I need a little bit of help.
I have GC-MC results from samples of gland secretions and I want to test for individual repeatability and inter-individual similarity. I looked into the literature but in the majority of studies, they either use a subsample of peaks, use the principal components obtained from the PCA for the comparison, or use measures that just account for the variance in the sample. Is there a way to obtain an accurate and comprehensive (i.e. taking into account and comparing all the peaks) measure of similarity that can be used? Ideally, I would like to obtain a matrix (with a pairwise comparison among all the individuals/samples tested) out of it too.
N.B. Just a limited number of the compounds in the samples have been identified, so I'm using raw data about retention time and (relative) area of the peaks. Moreover (of course) I don't have the same peaks in all the various samples, so I don't think the "usual" repeatability tests for paired data are an option (unless I modify the dataset a lot, that can be done but I don't know whether or not it's the right way to proceed).

Network

Cited By

Projects

Projects (2)
Project
My PhD project focuses on phenotypic plasticity in sexually selected traits and my study species is the guppy, Poecilia reticulata, a small tropical fish. I am interested in physiological and behavioural traits related to mate choice and intra-sexual competition, both at the pre- and post-copulatory level. My aim is to understand how these animals modify their reproductive strategies in response to the social context and which are the costs and benefits associated with this flexibility.