4.4 Article

Drivers for genetic structure at different geographic scales for Pacific red snapper (Lutjanus peru) and yellow snapper (Lutjanus argentiventris) in the tropical eastern Pacific

Journal

JOURNAL OF FISH BIOLOGY
Volume 98, Issue 5, Pages 1267-1280

Publisher

WILEY
DOI: 10.1111/jfb.14656

Keywords

Gulf of California; habitat discontinuity; isolation by distance; larval dispersal; microsatellites

Funding

  1. Consejo Nacional de Ciencia y Tecnologia (CONACyT) [CB2015-257019]
  2. CONACyT scholarship [703296]

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The study analyzed the genetic structure of Pacific red snapper and yellow snapper in the tropical eastern Pacific region, finding significant genetic structure in both species at different locations, mainly influenced by factors such as isolation by distance and habitat differences.
The tropical eastern Pacific (TEP) is a highly dynamic region and a model system to study how habitat discontinuities affect the distribution of shorefishes, particularly for species that display ontogenetic habitat shifts, including snappers (Lutjanidae). To evaluate the genetic structure of the Pacific red snapper (Lutjanus peru) and the yellow snapper (Lutjanus argentiventris) throughout their distribution range along the TEP, 13 and 11 microsatellite loci were analysed, respectively. The genetic diversity of L. peru (N = 446) and L. argentiventris (N = 170) was evaluated in 10 and 5 localities, respectively, showing slightly higher but non-significant values in the Gulf of California for both species. The genetic structure analysis identified the presence of significant genetic structure in both species, but the locations of the identified barriers for the gene flow differed between species. The principal driver for the genetic structure at large scales >2500 km was isolation by distance. At smaller scales (<250 km), the habitat discontinuity for juveniles and adults and the environmental differences throughout the distribution range represented potential barriers to gene flow between populations for both species.

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