TY - JOUR
T1 - Assessing temporal patterns and species composition of glass eel (Anguilla spp.) cohorts in Sumatra and Java using DNA barcodes
AU - Wibowo, Arif
AU - Hubert, Nicolas
AU - Dahruddin, Hadi
AU - Steinke, Dirk
AU - Suhaimi, Rezki Antoni
AU - Alexander, Samuel
AU - Atminarso, Dwi
AU - Anggraeni, Dian Pamularsih
AU - Trismawanti, Ike
AU - Baumgartner, Lee J.
AU - Ning, Nathan
PY - 2021/4/29
Y1 - 2021/4/29
N2 -
Anguillid eels are widely acknowledged for their ecological and
socio-economic value in many countries. Yet, knowledge regarding their
biodiversity, distribution and abundance remains
superficial—particularly in tropical countries such as Indonesia, where
demand for anguillid eels is steadily increasing along with the threat
imposed by river infrastructure developments. We investigated the
diversity of anguillid eels on the western Indonesian islands of Sumatra
and Java using automated molecular classification and genetic species
delimitation methods to explore temporal patterns of glass eel cohorts
entering inland waters. A total of 278 glass eels were collected from
monthly samplings along the west coast of Sumatra and the south coast of
Java between March 2017 and February 2018. An automated, DNA-based
glass eel identification was performed using a DNA barcode reference
library consisting of 64 newly generated DNA barcodes and 117 DNA
barcodes retrieved from BOLD for all nine Anguilla
species known to occur in Indonesia. Species delimitation methods
converged in delineating eight Molecular Operational Taxonomic Units
(MOTUs), with A. nebolusa and A. bengalensis being undistinguishable by DNA barcodes. A total of four MOTUs were detected within the glass eel samples, corresponding to Anguilla bicolor, A. interioris, A. marmorata, and A. nebulosa/A. bengalensis. Monthly captures indicated that glass eel recruitment peaks in June, during the onset of the dry season, and that A. bicolor
is the most prevalent species. Comparing indices of mitochondrial
genetic diversity between yellow/silver eels, originating from several
sites across the species range distribution, and glass eels, collected
in West Sumatra and Java, indicated a marked difference. Glass eels
displayed a much lower diversity than yellow/silver eels. Implications
for the management of glass eel fisheries and species conservation are
discussed.
AB -
Anguillid eels are widely acknowledged for their ecological and
socio-economic value in many countries. Yet, knowledge regarding their
biodiversity, distribution and abundance remains
superficial—particularly in tropical countries such as Indonesia, where
demand for anguillid eels is steadily increasing along with the threat
imposed by river infrastructure developments. We investigated the
diversity of anguillid eels on the western Indonesian islands of Sumatra
and Java using automated molecular classification and genetic species
delimitation methods to explore temporal patterns of glass eel cohorts
entering inland waters. A total of 278 glass eels were collected from
monthly samplings along the west coast of Sumatra and the south coast of
Java between March 2017 and February 2018. An automated, DNA-based
glass eel identification was performed using a DNA barcode reference
library consisting of 64 newly generated DNA barcodes and 117 DNA
barcodes retrieved from BOLD for all nine Anguilla
species known to occur in Indonesia. Species delimitation methods
converged in delineating eight Molecular Operational Taxonomic Units
(MOTUs), with A. nebolusa and A. bengalensis being undistinguishable by DNA barcodes. A total of four MOTUs were detected within the glass eel samples, corresponding to Anguilla bicolor, A. interioris, A. marmorata, and A. nebulosa/A. bengalensis. Monthly captures indicated that glass eel recruitment peaks in June, during the onset of the dry season, and that A. bicolor
is the most prevalent species. Comparing indices of mitochondrial
genetic diversity between yellow/silver eels, originating from several
sites across the species range distribution, and glass eels, collected
in West Sumatra and Java, indicated a marked difference. Glass eels
displayed a much lower diversity than yellow/silver eels. Implications
for the management of glass eel fisheries and species conservation are
discussed.
KW - species delimitation
KW - DNA-based classification
KW - genetic diversity
KW - catadromy
KW - conservation
U2 - 10.3390/d13050193
DO - 10.3390/d13050193
M3 - Article
SN - 1424-2818
VL - 13
SP - 1
EP - 15
JO - Diversity
JF - Diversity
IS - 5
M1 - 193
ER -
