@article{fdi:010062553,
  title = {{A}n important natural genetic resource of {O}reochromis niloticus ({L}innaeus, 1758) threatened by aquaculture activities in {L}oboi drainage, {K}enya},
  author = {{N}diwa, {T}. {C}. and {N}yingi, {D}. {W}. and {A}gn{\`e}se, {J}ean-{F}ran{\c{c}}ois},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he need to improve food security in {A}frica through culture of tilapias has led to transfer of different species from their natural ranges causing negative impacts on wild fish genetic resources. {L}oboi swamp in {K}enya is fed by three hot springs: {L}ake {B}ogoria {H}otel, {C}helaba and {T}urtle {S}prings, hosting natural populations of {O}reochromis niloticus. {T}he present study aimed at better genetic characterization of these threatened populations. {P}artial mt{DNA} sequences of the {D}-loop region and variations at 16 microsatellite loci were assessed in the three hot spring populations and compared with three other natural populations of {O}. niloticus in the region. {R}esults obtained indicated that the hot spring populations had mitochondrial and nuclear genetic variability similar to or higher than the large closely related populations. {T}his may be attributed to the perennial nature of the hot springs, which do not depend on rainfall but rather receive permanent water supply from deep aquifers. {T}he study also revealed that gene flow between the three different hot spring populations was sufficiently low thus allowing their differentiation. {T}his differentiation was unexpected considering the very close proximity of the springs to each other. {I}t is possible that the swamp creates a barrier to free movement of fish from one spring to the other thereby diminishing gene flow. {F}inally, the most surprising and worrying results were that the three hot spring populations are introgressed by mt{DNA} genes of {O}. leucostictus, while microsatellite analysis suggested that some nuclear genes may also have crossed the species barrier. {I}t is very likely that the recent intensification of aquaculture activities in the {L}oboi drainage may be responsible for these introgressions. {T}aking into account the importance of these new genetic resources, protection and management actions of the {L}oboi swamp should be accorded top priority to prevent the loss of these spring populations.},
  keywords = {{KENYA}},
  booktitle = {},
  journal = {{P}lo{S} {O}ne},
  volume = {9},
  numero = {9},
  pages = {e106972},
  ISSN = {1932-6203},
  year = {2014},
  DOI = {10.1371/journal.pone.0106972},
  URL = {https://www.documentation.ird.fr/hor/fdi:010062553},
}