Sexual-size dimorphism in two synanthropic rat species: comparison and eco-evolutionary perspectives
Sexual dimorphism is a common trait in many mammal species and sexual-size dimorphism (SSD) represents its commonest form. Rattus rattus and Rattus norvegicus are two cosmopolitan, polygynous species, for which a male-biased SSD has been anecdotally reported, but never quantified. In this work, we a...
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ftunivromairis:oai:iris.uniroma1.it:11573/927426 2023-10-09T21:55:32+02:00 Sexual-size dimorphism in two synanthropic rat species: comparison and eco-evolutionary perspectives Mori, Emiliano IACUCCI, ANGELA CASTIGLIA, Riccardo SANTINI, LUCA Mori, Emiliano Iacucci, Angela Castiglia, Riccardo Santini, Luca 2016 ELETTRONICO http://hdl.handle.net/11573/927426 https://doi.org/10.1016/j.mambio.2016.12.002 http://www.sciencedirect.com/science/article/pii/S1616504716302038 eng eng Elsevier Ltd info:eu-repo/semantics/altIdentifier/wos/WOS:000398763900010 volume:83 firstpage:78 lastpage:80 numberofpages:3 journal:MAMMALIAN BIOLOGY http://hdl.handle.net/11573/927426 http://dx.doi.org/10.1016/j.mambio.2016.12.002 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85008690088 http://www.sciencedirect.com/science/article/pii/S1616504716302038 Black rat Brown rat Rattus rattus Rattus norvegicus Sexual-size dimorphism Body mass info:eu-repo/semantics/article 2016 ftunivromairis https://doi.org/10.1016/j.mambio.2016.12.002 2023-09-10T00:08:31Z Sexual dimorphism is a common trait in many mammal species and sexual-size dimorphism (SSD) represents its commonest form. Rattus rattus and Rattus norvegicus are two cosmopolitan, polygynous species, for which a male-biased SSD has been anecdotally reported, but never quantified. In this work, we assessed the occurrence of SSD in both species and we tested the hypothesis that R. norvegicus has a more evident SSD than R. rattus, in agreement with their body mass-testes size ratio, intra-male aggressive behaviour and mating system. We collected weight data of 40 (20 males and 20 females) adult R. rattus and 27 (13 males and 14 females) adult R. norvegicus from 4 localities in Italy characterized by different habitat typologies. We used a t-test based on Bayesian inference to compare the SSD in both species. The results were in line with our expectation supporting a higher SSD in R. norvegicus than in R. rattus. This study aimed to identify the eco-evolutionary drivers of SSD, and provides further support to well established life history theories on two widely distributed rodent species. Article in Journal/Newspaper Rattus rattus Sapienza Università di Roma: CINECA IRIS Mammalian Biology 83 78 80 |
institution |
Open Polar |
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Sapienza Università di Roma: CINECA IRIS |
op_collection_id |
ftunivromairis |
language |
English |
topic |
Black rat Brown rat Rattus rattus Rattus norvegicus Sexual-size dimorphism Body mass |
spellingShingle |
Black rat Brown rat Rattus rattus Rattus norvegicus Sexual-size dimorphism Body mass Mori, Emiliano IACUCCI, ANGELA CASTIGLIA, Riccardo SANTINI, LUCA Sexual-size dimorphism in two synanthropic rat species: comparison and eco-evolutionary perspectives |
topic_facet |
Black rat Brown rat Rattus rattus Rattus norvegicus Sexual-size dimorphism Body mass |
description |
Sexual dimorphism is a common trait in many mammal species and sexual-size dimorphism (SSD) represents its commonest form. Rattus rattus and Rattus norvegicus are two cosmopolitan, polygynous species, for which a male-biased SSD has been anecdotally reported, but never quantified. In this work, we assessed the occurrence of SSD in both species and we tested the hypothesis that R. norvegicus has a more evident SSD than R. rattus, in agreement with their body mass-testes size ratio, intra-male aggressive behaviour and mating system. We collected weight data of 40 (20 males and 20 females) adult R. rattus and 27 (13 males and 14 females) adult R. norvegicus from 4 localities in Italy characterized by different habitat typologies. We used a t-test based on Bayesian inference to compare the SSD in both species. The results were in line with our expectation supporting a higher SSD in R. norvegicus than in R. rattus. This study aimed to identify the eco-evolutionary drivers of SSD, and provides further support to well established life history theories on two widely distributed rodent species. |
author2 |
Mori, Emiliano Iacucci, Angela Castiglia, Riccardo Santini, Luca |
format |
Article in Journal/Newspaper |
author |
Mori, Emiliano IACUCCI, ANGELA CASTIGLIA, Riccardo SANTINI, LUCA |
author_facet |
Mori, Emiliano IACUCCI, ANGELA CASTIGLIA, Riccardo SANTINI, LUCA |
author_sort |
Mori, Emiliano |
title |
Sexual-size dimorphism in two synanthropic rat species: comparison and eco-evolutionary perspectives |
title_short |
Sexual-size dimorphism in two synanthropic rat species: comparison and eco-evolutionary perspectives |
title_full |
Sexual-size dimorphism in two synanthropic rat species: comparison and eco-evolutionary perspectives |
title_fullStr |
Sexual-size dimorphism in two synanthropic rat species: comparison and eco-evolutionary perspectives |
title_full_unstemmed |
Sexual-size dimorphism in two synanthropic rat species: comparison and eco-evolutionary perspectives |
title_sort |
sexual-size dimorphism in two synanthropic rat species: comparison and eco-evolutionary perspectives |
publisher |
Elsevier Ltd |
publishDate |
2016 |
url |
http://hdl.handle.net/11573/927426 https://doi.org/10.1016/j.mambio.2016.12.002 http://www.sciencedirect.com/science/article/pii/S1616504716302038 |
genre |
Rattus rattus |
genre_facet |
Rattus rattus |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000398763900010 volume:83 firstpage:78 lastpage:80 numberofpages:3 journal:MAMMALIAN BIOLOGY http://hdl.handle.net/11573/927426 http://dx.doi.org/10.1016/j.mambio.2016.12.002 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85008690088 http://www.sciencedirect.com/science/article/pii/S1616504716302038 |
op_doi |
https://doi.org/10.1016/j.mambio.2016.12.002 |
container_title |
Mammalian Biology |
container_volume |
83 |
container_start_page |
78 |
op_container_end_page |
80 |
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1779319485872734208 |