scholarly journals Strongly structured populations and reproductive habitat fragmentation increase the vulnerability of the Mediterranean starry ray Raja asterias (Elasmobranchii, Rajidae)

2021 ◽  
Author(s):  
Giusy Catalano ◽  
Valentina Crobe ◽  
Alice Ferrari ◽  
Romano Baino ◽  
Daniela Massi ◽  
...  
Keyword(s):  
Habitat Fragmentation ◽  
Structured Populations ◽  
The Mediterranean

Genetic patterns of habitat fragmentation and past climate-change effects in the Mediterranean high-mountain plantArmeria caespitosa(Plumbaginaceae)

2013 ◽  
Vol 100 (8) ◽  
pp. 1641-1650 ◽  
Author(s):  
Alfredo García-Fernández ◽  
Jose M. Iriondo ◽  
Adrián Escudero ◽  
Javier Fuertes Aguilar ◽  
Gonzalo Nieto Feliner
Keyword(s):  
Climate Change ◽  
Habitat Fragmentation ◽  
High Mountain ◽  
Past Climate ◽  
Climate Change Effects ◽  
Genetic Patterns ◽  
The Mediterranean ◽  
Past Climate Change

scholarly journals Genetic connectivity between Atlantic bluefin tuna larvae spawned in the Gulf of Mexico and in the Mediterranean Sea

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11568
Author(s):  
Carolina Johnstone ◽  
Montse Pérez ◽  
Estrella Malca ◽  
José María Quintanilla ◽  
Trika Gerard ◽  
...  
Keyword(s):  
Gene Flow ◽  
Gulf Of Mexico ◽  
Mediterranean Sea ◽  
Molecular Ecology ◽  
Bluefin Tuna ◽  
Structured Populations ◽  
Genetic Connectivity ◽  
Homing Behavior ◽  
Atlantic Bluefin Tuna ◽  
The Mediterranean

The highly migratory Atlantic bluefin tuna (ABFT) is currently managed as two distinct stocks, in accordance with natal homing behavior and population structuring despite the absence of barriers to gene flow. Larval fish are valuable biological material for tuna molecular ecology. However, they have hardly been used to decipher the ABFT population structure, although providing the genetic signal from successful breeders. For the first time, cooperative field collection of tuna larvae during 2014 in the main spawning area for each stock, the Gulf of Mexico (GOM) and the Mediterranean Sea (MED), enabled us to assess the ABFT genetic structure in a precise temporal and spatial frame exclusively through larvae. Partitioning of genetic diversity at nuclear microsatellite loci and in the mitochondrial control region in larvae spawned contemporarily resulted in low significant fixation indices supporting connectivity between spawners in the main reproduction area for each population. No structuring was detected within the GOM after segregating nuclear diversity in larvae spawned in two hydrographically distinct regions, the eastern GOM (eGOM) and the western GOM (wGOM), with the larvae from eGOM being more similar to those collected in the MED than the larvae from wGOM. We performed clustering of genetically characterized ABFT larvae through Bayesian analysis and by Discriminant Analysis of Principal Components (DAPC) supporting the existence of favorable areas for mixing of ABFT spawners from Western and Eastern stocks, leading to gene flow and apparent connectivity between weakly structured populations. Our findings suggest that the eastern GOM is more prone for the mixing of breeders from the two ABFT populations. Conservation of this valuable resource exploited for centuries calls for intensification of tuna ichthyoplankton research and standardization of genetic tools for monitoring population dynamics.

115 Heart failure mortality due to ischemic etiology: is it the same in the Mediterranean lifestyle?

2006 ◽  
Vol 5 (1) ◽  
pp. 28-29
Author(s):  
M JIMENEZNAVARRO ◽  
J GOMEZDOBLAS ◽  
G GOMEZHERNANDEZ ◽  
A DOMINGUEZFRANCO ◽  
J GARCIAPINILLA ◽  
...  
Keyword(s):  
Heart Failure ◽  
The Mediterranean
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