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The “Evolutionarily Significant Unit” concept and its applicability in
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The “Evolutionarily Significant Unit” concept and its applicability in
biological conservation (Casacci et al., 2014)-G1
Introduction
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Different country have different approaches like Independent Conservation Unit (ICU) and Distinct Population Segment (DPS).
ESU is a conservation unit conceptualised by Ryder (1986) used for below species level and theoretically applicable to wide range of taxa.
Eventhough ESU have gained scientific support and has been adapted to various criteria and scenarios
Some authors have suggested that obtaining a fixed and universal definition of ESU may not be feasible
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Conclusions
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The diagnosis of conservation units should be based on full recognition of the multiple forces capable of driving the evolution of molecular, ecological, morphological and behavioural characters
Priority should be recognised for species showing the highest character richness in phylogenetic reconstructions
Non molecular data provide critical information on differences between taxa recently originated by the action of separate adaptive processes which cannot detected by current DNA analyses
The combination of data from multiple genetic markers with the most traditional taxonomic approach, together with those from ecological and behavioural observations, is the only effective way to avoid incorrect diagnoses
We should accommodate all those taxa apparently positioned on an ‘evolutionary front’ for example those characterised by recent (micro) speciation events that have highest potentials for future biodiversity dynamics
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