Testing species delimitations in four Italian sympatric leuciscine fishes in the Tiber River: a combined morphological and molecular approach.

Leuciscine fishes represent an important component of freshwater ichthyofauna endemic to northern Mediterranean areas. This lineage shows high intra-specific morphological variability and exhibits high levels of hybridization, two characteristics that contribute to systematic uncertainties, misclass...

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Autores principales: Lorenzo Tancioni, Tommaso Russo, Stefano Cataudella, Valentina Milana, Anne Kathrin Hett, Elisa Corsi, Anna Rita Rossi
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Publicado: Public Library of Science (PLoS) 2013
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spelling oai:doaj.org-article:88c95ced622d40a594956794b12965572021-11-18T07:50:58ZTesting species delimitations in four Italian sympatric leuciscine fishes in the Tiber River: a combined morphological and molecular approach.1932-620310.1371/journal.pone.0060392https://doaj.org/article/88c95ced622d40a594956794b12965572013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23565240/?tool=EBIhttps://doaj.org/toc/1932-6203Leuciscine fishes represent an important component of freshwater ichthyofauna endemic to northern Mediterranean areas. This lineage shows high intra-specific morphological variability and exhibits high levels of hybridization, two characteristics that contribute to systematic uncertainties, misclassification of taxa and, potentially, the mismanagement of biodiversity. This study focused on brook chub, Squalius lucumonis, an endemic taxon of Central Italy. The taxonomic status of this species has long been questioned, and a hybrid origin from sympatric leusciscines (S. squalus x Rutilus rubilio, or S. squalus x Telestes muticellus) has been hypothesised. A phenotypic (evaluating shape and meristic counts) and genetic (using mitochondrial and nuclear markers) investigation of these four taxa was conducted to test species delimitation in sympatric areas and to evaluate the taxonomic status of S. lucumonis. One hundred and forty-five individuals of all four taxa were collected within streams of the lowest portion of the Tiber River basin and analysed; this region encompasses a large portion of the S. lucumonis distribution. The different morphological and genetic approaches were individually examined, compared, and then combined in a quantitative model to both investigate the limits of each approach and to identify cases of misclassification. The results obtained confirm the cladogenetic non-hybrid origin of S. lucumonis, highlight the need for immediate conservation actions and emphasise the value of an integrated approach in the study of leuciscines evolution.Lorenzo TancioniTommaso RussoStefano CataudellaValentina MilanaAnne Kathrin HettElisa CorsiAnna Rita RossiPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 4, p e60392 (2013)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Lorenzo Tancioni
Tommaso Russo
Stefano Cataudella
Valentina Milana
Anne Kathrin Hett
Elisa Corsi
Anna Rita Rossi
Testing species delimitations in four Italian sympatric leuciscine fishes in the Tiber River: a combined morphological and molecular approach.
description Leuciscine fishes represent an important component of freshwater ichthyofauna endemic to northern Mediterranean areas. This lineage shows high intra-specific morphological variability and exhibits high levels of hybridization, two characteristics that contribute to systematic uncertainties, misclassification of taxa and, potentially, the mismanagement of biodiversity. This study focused on brook chub, Squalius lucumonis, an endemic taxon of Central Italy. The taxonomic status of this species has long been questioned, and a hybrid origin from sympatric leusciscines (S. squalus x Rutilus rubilio, or S. squalus x Telestes muticellus) has been hypothesised. A phenotypic (evaluating shape and meristic counts) and genetic (using mitochondrial and nuclear markers) investigation of these four taxa was conducted to test species delimitation in sympatric areas and to evaluate the taxonomic status of S. lucumonis. One hundred and forty-five individuals of all four taxa were collected within streams of the lowest portion of the Tiber River basin and analysed; this region encompasses a large portion of the S. lucumonis distribution. The different morphological and genetic approaches were individually examined, compared, and then combined in a quantitative model to both investigate the limits of each approach and to identify cases of misclassification. The results obtained confirm the cladogenetic non-hybrid origin of S. lucumonis, highlight the need for immediate conservation actions and emphasise the value of an integrated approach in the study of leuciscines evolution.
format article
author Lorenzo Tancioni
Tommaso Russo
Stefano Cataudella
Valentina Milana
Anne Kathrin Hett
Elisa Corsi
Anna Rita Rossi
author_facet Lorenzo Tancioni
Tommaso Russo
Stefano Cataudella
Valentina Milana
Anne Kathrin Hett
Elisa Corsi
Anna Rita Rossi
author_sort Lorenzo Tancioni
title Testing species delimitations in four Italian sympatric leuciscine fishes in the Tiber River: a combined morphological and molecular approach.
title_short Testing species delimitations in four Italian sympatric leuciscine fishes in the Tiber River: a combined morphological and molecular approach.
title_full Testing species delimitations in four Italian sympatric leuciscine fishes in the Tiber River: a combined morphological and molecular approach.
title_fullStr Testing species delimitations in four Italian sympatric leuciscine fishes in the Tiber River: a combined morphological and molecular approach.
title_full_unstemmed Testing species delimitations in four Italian sympatric leuciscine fishes in the Tiber River: a combined morphological and molecular approach.
title_sort testing species delimitations in four italian sympatric leuciscine fishes in the tiber river: a combined morphological and molecular approach.
publisher Public Library of Science (PLoS)
publishDate 2013
url https://doaj.org/article/88c95ced622d40a594956794b1296557
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