scholarly journals Morphological survey as powerful detection tool of pure and local phenotypes in Salmo trutta complex

2019 ◽  
pp. 48 ◽  
Author(s):  
Massimo Lorenzoni ◽  
Antonella Carosi ◽  
Massimo Giovannotti ◽  
Gianandrea La Porta ◽  
Andrea Splendiani ◽  
...  
Keyword(s):  
Salmo Trutta ◽  
Conservation Status ◽  
Central Italy ◽  
Geometric Analysis ◽  
Morphological Characterization ◽  
Mediterranean Populations ◽  
Local Adaptations ◽  
Black Spots ◽  
Adipose Fin ◽  
Mediterranean Trout

The native Mediterranean trout populations in central Italy are at risk of extinction. Hybridization with the alien Atlantic trout represents one of the major threats to the species. The main aim of the research was to test the efficiency of morphological characterization in revealing alien trout introduction, pure lineages and local adaptations, in five watersheds of central Apennines (Italy). Data analysis was carried out for a total of 258 specimens already genetically identified. The results of the multivariate analysis, performed using 10 qualitative and 47 quantitative variables, revealed two distinct phenotypic groups and confirmed, at a morphological level, the genetic separation between Atlantic and Mediterranean trout. The morphological variables that play a key role in the discrimination of the Mediterranean trout were: (i) number of parr marks with striped pattern, (ii) adipose fin mainly with white color and without black spots, and (iii) number of black opercular spots, compared to the Atlantic trout. The geometric analysis revealed the importance of the spatial arrangements of spots on the fish flank and the shape of caudal peduncle in discriminating different Mediterranean populations. The information collected confirmed the powerful of morphological surveys in the screening of conservation status of wild trout populations.

scholarly journals As-Built 3D Heritage City Modelling to Support Numerical Structural Analysis: Application to the Assessment of an Archaeological Remain

2019 ◽  
Vol 11 (11) ◽  
pp. 1276 ◽  
Author(s):  
Daniel Antón ◽  
Paloma Pineda ◽  
Benachir Medjdoub ◽  
Alfredo Iranzo
Keyword(s):  
Structural Damage ◽  
Laser Scanning ◽  
Conservation Status ◽  
Geometric Analysis ◽  
Structural Safety ◽  
Cloud Data ◽  
Analysis Application ◽  
Status Analysis ◽  
3D Meshing

Terrestrial laser scanning is a widely used technology to digitise archaeological, architectural and cultural heritage. This allows for modelling the assets’ real condition in comparison with traditional data acquisition methods. This paper, based on the case study of the basilica in the Baelo Claudia archaeological ensemble (Tarifa, Spain), justifies the need of accurate heritage modelling against excessively simplified approaches in order to support structural safety analysis. To do this, after validating the 3D meshing process from point cloud data, the semi-automatic digital reconstitution of the basilica columns is performed. Next, a geometric analysis is conducted to calculate the structural alterations of the columns. In order to determine the structural performance, focusing both on the accuracy and suitability of the geometric models, static and modal analyses are carried out by means of the finite element method (FEM) on three different models for the most unfavourable column in terms of structural damage: (1) as-built (2) simplified and (3) ideal model without deformations. Finally, the outcomes show that the as-built modelling enhances the conservation status analysis of the 3D heritage city (in terms of realistic compliance factor values), although further automation still needs to be implemented in the modelling process.

Morphological characterization of Mediterranean populations of Biserrula pelecinus L.

1997 ◽  
Vol 116 (2) ◽  
pp. 171-176 ◽  
Author(s):  
A. Loi ◽  
P. S. Cocks ◽  
J. G. Howieson ◽  
S. J. Carr
Keyword(s):  
Morphological Characterization ◽  
Mediterranean Populations

The sexually dimorphic adipose fin is an androgen target tissue in the brown trout (Salmo trutta fario)

2012 ◽  
Vol 39 (2) ◽  
pp. 233-241 ◽  
Author(s):  
Olcay Hisar ◽  
Adem Yavuz Sönmez ◽  
Şükriye Aras Hisar ◽  
Harun Budak ◽  
Nejdet Gültepe
Keyword(s):  
Brown Trout ◽  
Salmo Trutta ◽  
Sexually Dimorphic ◽  
Target Tissue ◽  
Brown Trout Salmo Trutta ◽  
Adipose Fin ◽  
Salmo Trutta Fario

scholarly journals Genomic consequences of a recent three-way admixture in supplemented wild brown trout populations revealed by ancestry tracts

2018 ◽  
Author(s):  
Maeva Leitwein ◽  
Pierre-Alexandre Gagnaire ◽  
Erick Desmarais ◽  
Patrick Berrebi ◽  
Bruno Guinand
Keyword(s):  
Brown Trout ◽  
Salmo Trutta ◽  
Natural Populations ◽  
Length Distribution ◽  
Wild Populations ◽  
Mediterranean Populations ◽  
Population Genomic ◽  
Evolutionary Consequences ◽  
Local Ancestry Inference ◽  
Detailed Picture

AbstractUnderstanding the evolutionary consequences of human-mediated introductions of domestic strains into the wild and their subsequent admixture with natural populations is of major concern in conservation biology. In the brown trout Salmo trutta, decades of stocking practices have profoundly impacted the genetic makeup of wild populations. Small local Mediterranean populations in the Orb River watershed (Southern France) have been subject to successive introductions of domestic strains derived from the Atlantic and Mediterranean lineages. However, the genomic impacts of two distinct sources of stocking (locally-derived vs divergent) on the genetic integrity of wild populations remain poorly understood. Here, we evaluate the extent of admixture from both domestic strains within three wild populations of this watershed, using 75,684 mapped SNPs obtained from double-digest restriction-site-associated DNA sequencing (dd-RADseq). Using a local ancestry inference approach, we provide a detailed picture of admixture patterns across the brown trout genome at the haplotype level. By analysing the chromosomal ancestry profiles of admixed individuals, we reveal a wider diversity of hybrid and introgressed genotypes than estimated using classical methods for inferring ancestry and hybrid pedigree. In addition, the length distribution of introgressed tracts retained different timings of introgression between the two domestic strains. We finally reveal opposite consequences of admixture on the level of polymorphism of the recipient populations between domestic strains. Our study illustrates the potential of using the information contained in the genomic mosaic of ancestry tracts in combination with classical methods based on allele frequencies for analysing multiple-way admixture with population genomic data.

Conservation status of Chirocephalus marchesonii Ruffo & Vesentini, 1957 in the Pilato Lake (Sibillini Mountains National Park, Central Italy)

2021 ◽  
Vol 194 (3) ◽  
pp. 171-185
Author(s):  
Antonella Carosi ◽  
Maria Gaetana Barelli ◽  
Alessandro Ambrosi ◽  
Alessandro Rossetti ◽  
Rosalba Padula ◽  
...  
Keyword(s):  
National Park ◽  
Conservation Status ◽  
Central Italy

Rediscovery of Croton hadrianii (Euphorbiaceae), a well distributed but long-forgotten species in Brazilian Amazon

Phytotaxa ◽  
2018 ◽  
Vol 349 (2) ◽  
pp. 141
Author(s):  
RODOLFO CARNEIRO SODRÉ ◽  
MARCOS JOSÉ DA SILVA
Keyword(s):  
Conservation Status ◽  
Original Description ◽  
Brazilian Amazon ◽  
Systematic Position ◽  
Morphological Characterization ◽  
Type Locality ◽  
Geographical Range ◽  
Taxonomic Study ◽  
Distribution Map ◽  
First Time

During a taxonomic study on Croton sect. Geiseleria from Brazil, 40 specimens were found from the southern portion of the Brazilian Amazon that correspond to C. hadrianii, a species hitherto known only from its original description and with the type locality within Brazil unknown. We present an amended description of C. hadrianii providing the first information on fully developed fruits and seeds, which previously undocumented, morphological characterization, as well as comments on its geographical range, including a distribution map, conservation status, and period of flowering and fruiting. The species is also illustrated and photographs in its habitat for the first time. Typification is also presented and the species systematic position within Croton sect. Geiseleria is discussed. Additionally, we provide a key to the 16 species of Croton sect. Geiseleria occurring in the Brazilian Amazon, as well as field images for most of them.

Sign in / Sign up

Export Citation Format

Share Document