%0 Journal Article %J Aquatic Sciences %D 2023 %T Biogeographical snapshot of life-history traits of European silver eels: insights from otolith microchemistry %A Teichert, Nils %A Bourillon, Bastien %A Suzuki, Kyoko %A Acou, Anthony %A Alexandre Carpentier %A Kuroki, Mari %A Righton, David %A Thomas Trancart %A Virag, Laure-Sarah %A Walker, Alan %A Otake, Tsuguo %A Eric Feunteun %K Anguilla anguilla %K Biogeography %K Brackish habitat %K otolith %K phenotypic plasticity %K Sr:Ca ratio %X Life-history traits of eels display a high level of phenotypic plasticity in response to large-scale biogeographical drivers, as well as local conditions encountered during the continental phase. Here, we provided a biogeographical snapshot of the variability of life-history traits of eels (Anguilla anguilla), across a large proportion of their natural distribution range. Silver eels (n = 99) were collected across eleven European catchments to investigate how life-history traits vary along geographical and saline habitats, as it was inferred from the Sr:Ca ratio in otoliths. Among 13 life-history traits tested, 3 of them such as total length, body or liver weight were related to geographical coordinates. Overall, eels grow faster in southern Europe and migrate earlier suggesting that the silvering process is related to the local growth conditions more than fish age. The salinity profiles revealed by the otoliths’ Sr:Ca ratios indicate that eels with a brackish life-history generally grow faster, reach larger size-at-age, and have a better condition than eels living in freshwater. This observation associated with the lower abundance of the sanguivorous swimbladder nematode, Anguillicola crassus, confirms the importance of brackish areas for sustaining the eel production. A large proportion of the observed variation of life-history traits remained unexplained by the biogeographical trends and salinity condition, which suggests that other drivers act at the catchment scale.
%B Aquatic Sciences %V 85 %8 Jan-04-2023 %G eng %U https://link.springer.com/10.1007/s00027-023-00940-4 %N 2 %! Aquat Sci %R 10.1007/s00027-023-00940-4 %0 Journal Article %J Progress in Oceanography %D 2019 %T Distribution of anguillid leptocephali and possible spawning areas in the South Pacific Ocean %A Mari Kuroki %A Michael J. Miller %A Eric Feunteun %A Pierre Sasal %A Timothy Pikering %A Yu-San Han %A Elisabeth Faliex %A Anthony Acou %A Aurélie Dessier %A Robert Schabetsberger %A Shun Watanabe %A Tatsuya Kawakami %A Hiroaki Onda %A Takatoshi Higuchi %A Aya Takeuchi %A Madoka Shimizu %A Chinthaka A. Hewavitharane %A Seishi Hagihara %A Terumasa Taka %A Shingo Kimura %A Noritaka Mochioka %A Tsuguo Otake %A Katsumi Tsukamoto %K Early life history %K Freshwater eels %K Migration %K otolith %K South Pacific %K Spawning %X Seven South Pacific anguillid eel species live from New Guinea to French Polynesia, but their spawning areas and life histories are mostly unknown despite previous sampling surveys. A July–October 2016 research cruise was conducted to study the spawning areas and times, and larval distributions of South Pacific anguillid eels, which included a short 155°E station-line northeast of New Guinea and five long transects (5–25°S, 160°E–140°W) crossing the South Equatorial (SEC) and other currents. This survey collected nearly 4000 anguilliform leptocephali at 179 stations using an Isaacs-Kidd Midwater Trawl accompanied by 104 CTD casts. Based on morphometric observations and DNA sequencing, 74 anguillid leptocephali were collected, which in the southern areas included 29 larvae of six species: Anguilla bicolor pacifica, A. marmorata, A. australis, A. reinhardtii, A. megastoma,and A. obscura (all anguillid species of the region were caught except A. dieffenbachii). Small A. australis (9.0–16.8 mm) and A. reinhardtii (12.4, 12.5 mm) leptocephali were collected south of the Solomon Islands, other A. australis (10.8–12.0 mm) larvae were caught northwest of Fiji along with an A. obscura (20.0 mm) larva, and an A. marmorata (7.8 mm) larva was collected near Samoa. Considering collection sites, larval ages from otolith analysis, and westward SEC drift, multiple spawning locations occurred from south of the Solomon Islands and the Fiji area (16–20 days old larvae) to near Samoa (19 days old larva) during June and July in areas where high-salinity Subtropical Underwater (STUW, 150 m depth) and the warm, low-salinity surface Fresh Pool were present. Five long hydrographic sections showed the strong Fresh Pool in the west and the STUW formation area in the east. %B Progress in Oceanography %V 180 %P 102234 %G eng %U http://www.sciencedirect.com/science/article/pii/S0079661119304148 %R https://doi.org/10.1016/j.pocean.2019.102234 %0 Journal Article %J Journal of Experimental Marine Biology and Ecology %D 2017 %T Specific gravity and migratory patterns of amphidromous gobioid fish from Okinawa Island, Japan %A Iida, Midori %A Masashi Kondo %A Hélène Tabouret %A Maeda, Ken %A Pécheyran, C %A Atsushi Hagiwara %A Philippe Keith %A Katsunori Tachihara %K Buoyancy %K diadromy %K Early life history %K Migratory history %K otolith %K Specific gravity %X

Amphidromy is a diadromous life history pattern where fish spawn in freshwater, and their larvae drift downstream to the sea; the larvae develop in marine environments then migrate back in rivers to grow and reproduce. Two amphidromous types with different life history characteristics, such as egg and larval sizes, exist. To understand the ecology and early life history of amphidromous gobioid fish, six species from Okinawa Island were selected—two large egg-type species (Rhinogobius similis and Tridentiger kuroiwae) and four small egg-type species (Stiphodon percnopterygionus, Stenogobius sp., Sicyopterus lagocephalus, and Eleotris acanthopoma). The migratory pattern of four of these species was confirmed using otolith Sr:Ca and Ba:Ca ratios combined with water chemistry analysis. Although these species showed amphidromous migratory patterns, the timing of migration from estuarine to freshwater habitats was species-specific. The large egg-type, R. similis, showed three different migratory patterns: a long marine larval phase with a relatively fast migration from estuarine to freshwater habitats, a short marine larval phase with a relatively fast migration, and a gradual migration. Similar patterns of a long and fast migration or a gradual migration were seen in T. kuroiwae; however, the two small eggtype species, Sti. percnopterygionus and Stenogobius sp., showed rapid migration to freshwater after entering the river. To estimate larval ecology in the sea, ontogenetic changes in specific gravity (SG) were examined in all species. The SG was measured day and night for 1–5 days until settlement in R. similis and T. kuroiwae, and until 10 days after hatching in the other species. The SG of all species ranged from 1.0138 to 1.0488, and varied among ontogenetic stages and between day and night and species. Larval SG was relatively similar between R. similis and T. kuroiwae, with low SG in the early stages and high SG after yolk absorption. During the late larval stages and until settlement, T. kuroiwae showed diel changes in SG, with higher SG during the day, whereas R. similis had a relatively constant pattern. The diel changes of T. kuroiwae larvae suggest different activity during the day and at night (e.g. diel vertical migration). In the four small egg-type species, SG was high at hatching and decreased thereafter, not showing large diel changes. The results suggest that sympatric amphidromous gobioid species have various early life histories that may be influenced by several larval traits, including SG.

%B Journal of Experimental Marine Biology and Ecology %V 486 %P 160-169 %G eng %N 2017 %0 Journal Article %J ECOLOGY OF FRESHWATER FISH %D 2016 %T Larval traits of the Caribbean amphidromous goby Sicydium punctatum (Gobioidei: Sicydiinae) in Guadeloupe %A Léa Lejeune %A Hélène Tabouret %A Taillebois, Laura %A Monti, Dominique %A Philippe Keith %K amphidromy %K larval dispersal %K Lesser Antilles %K otolith %K Sicydiinae %B ECOLOGY OF FRESHWATER FISH %V 25 %P 272-280 %G eng %0 Journal Article %J Life and environment %D 2015 %T Do Sicydium punctatum adults move in the Caribbean estuaries? New insight from strontium isotopes. %A Hélène Tabouret %A Monti, Dominique %A Martin, J %A Berail, S %A Pécheyran, C %A Philippe Keith %A Bareille, Gilles %K INSULAR RIVERS %K MICROCHEMISTRY %K MIGRATIONS %K otolith %K SICYDIINAE. %K STRONTIUM %B Life and environment %V 65 %P 85-89. %G eng %N 2