Phylogeographical relationships of Sicilian brown trout and the effects of genetic introgression on morphospace occupation

Fruciano, Carmelo; Pappalardo, Andrea; Tigano, Concetta; Ferrito, Venera

doi:10.1111/bij.12279

Cited by 39 publications

(49 citation statements)

References 68 publications

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“…This method has been suggested to produce ordinations that are preferable to the commonly used scatterplots of canonical variate scores [59] and is increasingly used in geometric morphometric studies [64,65] as the ordinations do not exaggerate the extent of separation between groups. To better interpret variation along the first between-group principal component (bwgPC1)—which was computed based on data after a pooled within-group regression on centroid size and is therefore already corrected for intra-specific allometry—in terms of evolutionary allometry, we regressed bwgPC1 scores on centroid size.…”

Section: Methodsmentioning

confidence: 99%

Bat Species Comparisons Based on External Morphology: A Test of Traditional versus Geometric Morphometric Approaches

et al. 2015

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External morphology is commonly used to identify bats as well as to investigate flight and foraging behavior, typically relying on simple length and area measures or ratios. However, geometric morphometrics is increasingly used in the biological sciences to analyse variation in shape and discriminate among species and populations. Here we compare the ability of traditional versus geometric morphometric methods in discriminating between closely related bat species – in this case European horseshoe bats (Rhinolophidae, Chiroptera) – based on morphology of the wing, body and tail. In addition to comparing morphometric methods, we used geometric morphometrics to detect interspecies differences as shape changes. Geometric morphometrics yielded improved species discrimination relative to traditional methods. The predicted shape for the variation along the between group principal components revealed that the largest differences between species lay in the extent to which the wing reaches in the direction of the head. This strong trend in interspecific shape variation is associated with size, which we interpret as an evolutionary allometry pattern.

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Section: Methodsmentioning

confidence: 99%

Bat Species Comparisons Based on External Morphology: A Test of Traditional versus Geometric Morphometric Approaches

et al. 2015

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“…an effect of the high phenotypic plasticity typical of salmonids (Hutchings, ). On the other hand, these differences could give phenotypic support to the hypothesis that S. cetti belong to a lineage that is distinct from other Italian trout species (Bobbio et al ., ; Corradi et al ., ; Schöffmann et al ., ; Fruciano et al ., ).…”

Section: Number Of Spots On the Left Flank Of Salmo Cettii In Tellesimentioning

confidence: 99%

“…[This has been recently confirmed by Fruciano et al . ()]. No subsequent stocking activity has occurred and conservation activities have begun (Duchi, ).…”

Section: Number Of Spots On the Left Flank Of Salmo Cettii In Tellesimentioning

confidence: 99%

Flank spot number and its significance for systematics, taxonomy and conservation of the near‐threatened Mediterranean troutSalmo cettii: evidence from a genetically pure population

Duchi

2017

Journal of Fish Biology

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The number of spots on the flank of the Mediterranean trout Salmo cettii population from Tellesimo Stream in Sicily, Italy, varied between seven and 37, with a median and mode of 21, numbers much lower than those reported in the literature and different from those of other Italian trout populations. This finding could be ascribed to the phenotypic plasticity of the species or, alternatively, could provide evidence to support the different origin of Sicilian autochthonous trout. Given the ease of use of this character for the identification of native fish, it could be particularly important for conservation and management purposes.

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“…The AT lineage is native to both Iberian Peninsula (Cortey et al 2009) and Sicilian Island (Schöffmann et al 2007;Fruciano et al 2014) populations, while DU lineage is native solely in the Iberian Peninsula (Vera et al 2010). Introgression detection with mtDNA is required because the four AT haplotypes present in hatchery stocks are not naturally present in wild populations (Cortey & Garcia-Marin 2002).…”

Section: Introductionmentioning

confidence: 99%

Restoration of native Mediterranean brown trout Salmo cettii Rafinesque, 1810 (Actinopterygii: Salmonidae) populations using an electric barrier as a mitigation tool

Sabatini

Podda

Frau

et al. 2018

The European Zoological Journal

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This study assessed the effectiveness of a novel conservation strategy for the native brown trout populations in Sardinia (Italy). The conservation measures included: (i) installation of an electric fish barrier; (ii) removal of all the resident introgressed brown trout upstream from the barrier; (iii) restocking of the upstream region with native Sardinian trout genetically characterised; and (iv) estimation of native trout population size with prediction of future growth. Introgressed brown trout were removed using multiple-pass electrofishing methods in a 2-km region upstream from the barrier. In two eradication campaigns, conducted in 2010 and 2012, a total of 1801 trout were captured, comprising a total biomass of 55,501 g. The capture efficiency analysis showed total capture rates of over 99% were achieved for parr (0+ age cohort), and 100% for adult trout. After the eradication campaigns we restocked this area with native brown trout (Adriatic lineage, AD, according to the mitochondrial DNA control region nomenclature). The monitoring campaigns showed good survival (S = 60%) and reproduction of 3.1 recruits/adult trout. Successful breeding was recorded starting from the summer of 2015 and a self-sustaining population resulted after only two restocking events. The results of this restoration project allow recommendations to be made for future conservation eradication and repopulation projects for restoration of typical Mediterranean streams.

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Phylogeographical relationships of Sicilian brown trout and the effects of genetic introgression on morphospace occupation

Cited by 39 publications

References 68 publications

Bat Species Comparisons Based on External Morphology: A Test of Traditional versus Geometric Morphometric Approaches

Bat Species Comparisons Based on External Morphology: A Test of Traditional versus Geometric Morphometric Approaches

Flank spot number and its significance for systematics, taxonomy and conservation of the near‐threatened Mediterranean troutSalmo cettii: evidence from a genetically pure population

Restoration of native Mediterranean brown trout Salmo cettii Rafinesque, 1810 (Actinopterygii: Salmonidae) populations using an electric barrier as a mitigation tool

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