scholarly journals Phylogeographic inferences on the native brown trout mtDNA variation in central Italy

2006 ◽  
Vol 73 (2) ◽  
pp. 179-189 ◽  
Author(s):  
Andrea Splendiani ◽  
Massimo Giovannotti ◽  
Paola Nisi Cerioni ◽  
Maria Luisa Caniglia ◽  
Vincenzo Caputo
Keyword(s):  
Brown Trout ◽  
Central Italy ◽  
Mtdna Variation

Lack of mtDNA variation among remote middle Volga and upper Ural brown trout suggests recent and rapid recolonization

2016 ◽  
Vol 32 (5) ◽  
pp. 948-953 ◽  
Author(s):  
S. Marić ◽  
O. Askeyev ◽  
A. Askeyev ◽  
S. Monakhov ◽  
N. Yanybaev ◽  
...  
Keyword(s):  
Brown Trout ◽  
Mtdna Variation ◽  
Middle Volga

scholarly journals Seasonal Changes and Selectivity in the Diet of Brown Trout in the River Nera (Central Italy)

2003 ◽  
Vol 18 (3) ◽  
pp. 437-444 ◽  
Author(s):  
Romolo Fochetti ◽  
Irene Amici ◽  
Roberto Argano
Keyword(s):  
Brown Trout ◽  
Seasonal Changes ◽  
Central Italy

Phylogenetic diversity within the endemic brown trout Duero lineage: implications for conservation and management

2015 ◽  
Vol 66 (11) ◽  
pp. 1066 ◽  
Author(s):  
M. Vera ◽  
J. L. García-Marín ◽  
P. Martinez ◽  
C. Bouza
Keyword(s):  
Brown Trout ◽  
Conservation Strategies ◽  
Haplotype Group ◽  
Mtdna Variation ◽  
Long Time ◽  
Recent Origin ◽  
Parapatric Distribution ◽  
Definition Of ◽  
North Western ◽  
Complete Mtdna

Brown trout display great phenotypic and genetic variability. Use of mitochondrial DNA (mtDNA) variation has allowed the definition of seven different lineages in this species to date. One of them, the Duero (DU) lineage, was initially detected in the inner section of the Duero River in Spain, where it showed a parapatric distribution with the more widely distributed Atlantic (AT) lineage. Later mtDNA-RFLP (restriction fragment length polymorphism) studies detected the DU lineage in northern Spanish basins (Galicia). The aim of this work was to ascertain the origin and variability of these DU populations outside the Duero drainage. Using complete mtDNA control region sequencing, 11 novel DU haplotypes were identified. Several of them could be assigned to an endemic group in Galicia consistent with the long-time presence of the DU lineage outside the Duero River, and excluding a recent origin by human translocations. The DU haplotype group observed in north-western Iberian basins was estimated to diverge from that of the Duero River more than 100000 years ago. We therefore advocate for conservation strategies at regional and local scales rather than focussed in a single ESU as proposed in earlier works.

Genetic diversity of brown trout in central Italy

2004 ◽  
Vol 65 (2) ◽  
pp. 403-418 ◽  
Author(s):  
V. Caputo ◽  
M. Giovannotti ◽  
P. Nisi Cerioni ◽  
M. L. Caniglia ◽  
A. Splendiani
Keyword(s):  
Genetic Diversity ◽  
Brown Trout ◽  
Central Italy

scholarly journals Population status of the native Cottus gobio after removal of the alien Salmo trutta: a case-study in two Mediterranean streams (Italy)

2018 ◽  
pp. 22 ◽  
Author(s):  
Massimo Lorenzoni ◽  
Antonella Carosi ◽  
Massimo Giovannotti ◽  
Gianandrea La Porta ◽  
Andrea Splendiani ◽  
...  
Keyword(s):  
Brown Trout ◽  
Intraspecific Competition ◽  
Salmo Trutta ◽  
Central Italy ◽  
Fish Fauna ◽  
Inverse Correlation ◽  
Population Status ◽  
Mediterranean Streams ◽  
Cottus Gobio

In the Mediterranean area, one of the major threats to freshwater fish fauna is represented by the introduction of alien species. The bullhead, Cottus gobio, is a species of great conservation interest threatened by the massive introduction of hatchery-reared brown trout, Salmo trutta, for angling purposes. The aims of this research were: i) to present a case-study of interspecific and intraspecific competition in dwelling fish from two Mediterranean streams (central Italy); ii) to evaluate the bullhead population status before and after the alien brown trout removal, and iii) to investigate the influence of the environmental parameters on the abundance of both species. For the bullhead populations the abundances and the young-of-the-year percentage significantly increased after the removal activities. The growth analysis showed that, after the trout removal, bullhead were distinguished by greater performance and larger sizes in all age classes in comparison to the pre-removal period, while the condition factor (Kn) showed no differences, suggesting that the effects of trout population control acted mainly through predator-prey dynamics. An inverse correlation between the abundance of bullhead and its body condition suggested that the beneficial effects due to the reduction of predation could be compensated by the intraspecific competition due to the increase of the bullhead population density.

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