The microevolution of the Galápagos marine iguana Amblyrhynchus cristatus assessed by nuclear and mitochondrial genetic analyses

@article{Rassmann1997TheMO,
  title={The microevolution of the Gal{\'a}pagos marine iguana Amblyrhynchus cristatus assessed by nuclear and mitochondrial genetic analyses},
  author={Kornelia Rassmann and Diethard Tautz and Fritz Trillmich and Chris Gliddon},
  journal={Molecular Ecology},
  year={1997},
  volume={6}
}
Marine iguanas may have inhabited the Galápagos archipelago and its former, now sunken islands for more than 10 million years (Myr). It is therefore surprising that morphological and immunological data indicate little evolutionary divergence within the genus. We utilized mitochondrial DNA (mtDNA) sequence analyses and nuclear DNA fingerprinting to re‐evaluate the level and pattern of genetic differentiation among 22 marine iguana populations from throughout the archipelago. Both genetic marker… 
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Hybridization between the Galapagos land and marine iguana (Conolophus subcristatus and Amblyrhynchus cristatus) on Plaza Sur
TLDR
The hybrid status of a morphologically unusual iguana from this island is confirmed, using restriction fragment length polymorphism (RFLP) analyses of the nuclear ribosomal DNA (rDNA) of the Galapagos iguana, and it was the offspring of a female land iguana and a male marine iguana.
Genetic differentiation between marine iguanas from different breeding sites on the island of Santa Fe (Galapagos Archipelago).
We studied patterns of genetic diversity within and among 5 populations (318 individuals) of Galápagos marine iguanas (Amblyrhynchus cristatus) from the island Santa Fé. Populations were separated by…
The complete mitochondrial genomes of the Galápagos iguanas, Amblyrhynchus cristatus and Conolophus subcristatus
TLDR
The complete mitochondrial genomes of the marine iguana Amblyrhynchus cristatus and the land iguana Conolophus subcristatus are described and a phylogeny of the Iguanidae is presented, which confirms the sister-group relationship of Galápagos iguanas.
Genetic biogeography among insular populations of the amphidromous fish Plecoglossus altivelis assessed from mitochondrial DNA analysis
TLDR
The geneticvariability observed on each island is brought about by its dynamic equilibrium maintained by continuous immigration and local extinction, depending on the geographical location of the island relative to the mainland together with the size of the mainland.
Progressive colonization and restricted gene flow shape island-dependent population structure in Galápagos marine iguanas (Amblyrhynchus cristatus)
TLDR
This study is a nice example of how recently developed analytical tools such as Bayesian clustering analysis and DNA sequence-based demographic analyses can overcome potential biases introduced by simply relying on FST estimates from markers with different inheritance patterns.
Hybridization masks speciation in the evolutionary history of the Galápagos marine iguana
TLDR
It is hypothesized that the observed interplay of speciation and hybridization might be a mechanism by which local adaptations, generated by incipient speciation, can be absorbed into a common gene pool, thereby enhancing the evolutionary potential of the species as a whole.
Population genetics of Galápagos land iguana (genus Conolophus) remnant populations
TLDR
Although the initial captive breeding programmes, coupled with intensive efforts to eradicate introduced species, saved several land iguana populations from extinction, the molecular results provide objective data for improving in situ species survival plans and population management for this spectacular and emblematic reptile.
Population Genetic Structure and Conservation of the Galápagos Petrel (Pterodroma phaeopygia)
TLDR
For conservation purposes, populations from Floreana, Santa Cruz, San Cristóbal and Santiago should be regarded as separate genetic management units and all five populations should be protected.
Conservation of Galápagos land iguanas: genetic monitoring and predictions of a long‐term program on the island of Santa Cruz
TLDR
Analysis of the population genetic structure of land iguanas from Santa Cruz Island to investigate the genetic implications of a semi‐captive conservation program and suggest the genetic measures that should be adopted to avoid further genetic variability depletion and preserve this vulnerable endemic species.
Hierarchical population genetic analysis reveals metapopulation structure in a phytophagous Galápagos beetle
TLDR
A metapopulation structure with Tent extinctions and recolonisations of populations within each island is strongly suggested, and recent field observations support these findings.
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