TY - JOUR
T1 - Distribution of anguillid leptocephali and possible spawning areas in the South Pacific Ocean
AU - Kuroki, Mari
AU - Miller, Michael J.
AU - Feunteun, Eric
AU - Sasal, Pierre
AU - Pikering, Timothy
AU - Han, Yu San
AU - Faliex, Elisabeth
AU - Acou, Anthony
AU - Dessier, Aurélie
AU - Schabetsberger, Robert
AU - Watanabe, Shun
AU - Kawakami, Tatsuya
AU - Onda, Hiroaki
AU - Higuchi, Takatoshi
AU - Takeuchi, Aya
AU - Shimizu, Madoka
AU - Hewavitharane, Chinthaka A.
AU - Hagihara, Seishi
AU - Taka, Terumasa
AU - Kimura, Shingo
AU - Mochioka, Noritaka
AU - Otake, Tsuguo
AU - Tsukamoto, Katsumi
N1 - Funding Information:
We gratefully acknowledge the support of the captain and crew of the R/V Hakuho Maru. We also thank Dr. Don Jellyman, Dr. Christine Dupuy, Dr. Valerie Allain, Dr. Fabien Morat, Dr. Takashi Yamakawa, and Ms. Machiko Oya for their suggestions and cooperation about South Pacific research efforts, and we are grateful to all the other scientists, technicians, and students who helped to deploy the IKMT and CTD and to sort the many plankton samples to obtain anguillid larvae on board the KH-16-4 research cruise. Funding for various aspects of the survey was provided by JSPS KAKENHI Grant Number 26252030, 26450268, 17H03859, 17K19300. R.S. was supported by the Austrian Science Fund Number P28381.
Funding Information:
We gratefully acknowledge the support of the captain and crew of the R/V Hakuho Maru . We also thank Dr. Don Jellyman, Dr. Christine Dupuy, Dr. Valerie Allain, Dr. Fabien Morat, Dr. Takashi Yamakawa, and Ms. Machiko Oya for their suggestions and cooperation about South Pacific research efforts, and we are grateful to all the other scientists, technicians, and students who helped to deploy the IKMT and CTD and to sort the many plankton samples to obtain anguillid larvae on board the KH-16-4 research cruise. Funding for various aspects of the survey was provided by JSPS KAKENHI Grant Number 26252030 , 26450268 , 17H03859 , 17K19300 . R.S. was supported by the Austrian Science Fund Number P28381 .
Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2020/1
Y1 - 2020/1
N2 - 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.
AB - 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.
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U2 - 10.1016/j.pocean.2019.102234
DO - 10.1016/j.pocean.2019.102234
M3 - Article
AN - SCOPUS:85075987190
VL - 180
JO - Progress in Oceanography
JF - Progress in Oceanography
SN - 0079-6611
M1 - 102234
ER -