@article {5632, title = {Metabarcoding by Capture using a Single COI Probe (MCSP) to identify and quantify fish species in plankton swarms}, journal = {PLoS ONE }, volume = {13}, year = {2018}, pages = {e0202976}, abstract = {

The ability to determine the composition and relative frequencies of fish species in large ichthyoplankton swarms could have extremely important ecological applications However, this task is currently hampered by methodological limitations. We proposed a new method for Amazonian species based on hybridization capture of the COI gene DNA from a distant species (Danio rerio), absent from our study area (the Amazon basin). The COI sequence of this species is approximately equidistant from all COI of Amazonian species available. By using this sequence as probe we successfully facilitated the simultaneous identification of fish larvae belonging to the order Siluriformes and to the Characiformes represented in our ichthyoplankton samples. Species relative frequencies, estimated by the number of reads, showed almost perfect correlations with true frequencies estimated by a Sanger approach, allowing the development of a quantitative approach. We also proposed a further improvement to a previous protocol, which enables lowering the sequencing effort by 40 times. This new Metabarcoding by Capture using a Single Probe (MCSP) methodology could have important implications for ecology, fisheries management and conservation in fish biodiversity hotspots worldwide. Our approach could easily be extended to other plant and animal taxa.

}, doi = {https://doi.org/10.1371/journal.pone.0202976}, url = {https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0202976}, author = {Mariac, C{\'e}dric and Vigouroux, Y. and Fabrice Duponchelle and Garc{\'\i}a-D{\'a}vila, C and Nu{\~n}ez L. and Desmarais, E and Renno, Jean-Francois} } @article {5628, title = {Use of an acoustic telemetry array for fine scale fish behaviour assessment of captive Paiche, Arapaima gigas, breeders}, journal = {Aquaculture Research }, volume = {49}, year = {2018}, pages = {2296-2304}, abstract = {

As\ Arapaima gigas\ is one of the most valuable species for the growing production of Amazonian aquaculture, knowledge of its reproductive behaviour and its application to increase reproduction success in captivity is of great importance as no hormonal spawning induction technique exists for this species. An acoustic positioning system (LOTEK Inc.) was used to observe the interactions of adult fish to better understand the formation of mating pairs. Fish were placed in a 4,500\ m2\ aquaculture pond over a 6-month period in the IIAP field station of Pucallpa, Per{\'u}. This paper describes the methodological protocols used to set up and test the hydrophone array and presents the methodology used for the analysis of the huge amount of collected data. This methodology is illustrated by the analysis of a 6-day period for a mating pair that showed a spawning event. The results indicated that male and female occupied mostly one preferential area in one pond edge where the nesting area is located. Different activity patterns were observed during the spawning event, with male and female being closer during the spawning day. The results also showed that male travelled less distance than female during the studied period. Finally these results demonstrated the suitability of such equipment to monitor fish interactions at fine spatial (sub meter) and temporal (5\ s) scales in confined environments like aquaculture ponds.

}, doi = {doi.org/10.1111/are.13692}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1111/are.13692}, author = {Jesus Nu{\~n}ez-Rodriguez and Vela Diaz, A. and Bazan-Albitez, R and Koua, D and Nu{\~n}ez L. and Testi, B. and Renno, Jean-Francois and Duponchelle, F and Pella, H} }