Phyto-detritus feeding by early-stage larvae of Electrona antarctica (Myctophidae) off Wilkes Land in the Southern Ocean, Austral summer 2017
Myctophid fish function as a significant trophic link between zooplankton and higher predators in the oceanic ecosystems of the Southern Ocean. Although Electrona antarctica is one of the most abundant myctophids in the Southern Ocean, its early life history remains unclear. We analysed the food com...
Published in: | Polar Biology |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Springer-Verlag
2021
|
Subjects: | |
Online Access: | https://doi.org/10.1007/s00300-021-02880-x http://ecite.utas.edu.au/144815 |
id |
ftunivtasecite:oai:ecite.utas.edu.au:144815 |
---|---|
record_format |
openpolar |
spelling |
ftunivtasecite:oai:ecite.utas.edu.au:144815 2023-05-15T13:59:46+02:00 Phyto-detritus feeding by early-stage larvae of Electrona antarctica (Myctophidae) off Wilkes Land in the Southern Ocean, Austral summer 2017 Nirazuka, S Makabe, R Swadling, KM Moteki, M 2021 https://doi.org/10.1007/s00300-021-02880-x http://ecite.utas.edu.au/144815 en eng Springer-Verlag http://dx.doi.org/10.1007/s00300-021-02880-x Nirazuka, S and Makabe, R and Swadling, KM and Moteki, M, Phyto-detritus feeding by early-stage larvae of Electrona antarctica (Myctophidae) off Wilkes Land in the Southern Ocean, Austral summer 2017, Polar Biology, 44 pp. 1415-1425. ISSN 0722-4060 (2021) [Refereed Article] http://ecite.utas.edu.au/144815 Biological Sciences Ecology Marine and estuarine ecology (incl. marine ichthyology) Refereed Article PeerReviewed 2021 ftunivtasecite https://doi.org/10.1007/s00300-021-02880-x 2021-11-01T23:17:59Z Myctophid fish function as a significant trophic link between zooplankton and higher predators in the oceanic ecosystems of the Southern Ocean. Although Electrona antarctica is one of the most abundant myctophids in the Southern Ocean, its early life history remains unclear. We analysed the food composition and details of gut contents of larval E . antarctica (5.011.9mm standard length) using both light microscopy and scanning electron microscopy. Larvae were collected in January 2017 off Wilkes Land, East Antarctica. Detailed observations showed that the larvae fed mainly on aggregated particles composed largely of diatom frustules and diatom fragments (phyto-detritus); however, the species feeds mainly on zooplankton after completion of the larval stage. We found, on average, 1.5 phyto-detrital particles per individual and 0.15 zooplankton particles per individual among early-stage larvae. Phyto-detritus was found in 47% of the larval guts analysed. Separated intact diatom frustules were rarely found, and the numbers were negligible. Twenty-nine percent of aggregates contained shreds of larvacean filters. Thus, larval E . antarctica feeds mainly on phyto-detritus, sinking particles containing larvacean houses and other aggregated particles. We also concluded that, unlike observations from previous studies, zooplankton were a less important food source for the early-stage larvae. This study provided fundamental knowledge about diet of biomass-dominant myctophid fish during the early larval stage, which contributes to our understanding of the life history of E. antarctica and also to oceanic food webs in the Southern Ocean. Article in Journal/Newspaper Antarc* Antarctica E. Antarctica East Antarctica Polar Biology Southern Ocean Wilkes Land eCite UTAS (University of Tasmania) Southern Ocean East Antarctica Austral Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Polar Biology 44 7 1415 1425 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Biological Sciences Ecology Marine and estuarine ecology (incl. marine ichthyology) |
spellingShingle |
Biological Sciences Ecology Marine and estuarine ecology (incl. marine ichthyology) Nirazuka, S Makabe, R Swadling, KM Moteki, M Phyto-detritus feeding by early-stage larvae of Electrona antarctica (Myctophidae) off Wilkes Land in the Southern Ocean, Austral summer 2017 |
topic_facet |
Biological Sciences Ecology Marine and estuarine ecology (incl. marine ichthyology) |
description |
Myctophid fish function as a significant trophic link between zooplankton and higher predators in the oceanic ecosystems of the Southern Ocean. Although Electrona antarctica is one of the most abundant myctophids in the Southern Ocean, its early life history remains unclear. We analysed the food composition and details of gut contents of larval E . antarctica (5.011.9mm standard length) using both light microscopy and scanning electron microscopy. Larvae were collected in January 2017 off Wilkes Land, East Antarctica. Detailed observations showed that the larvae fed mainly on aggregated particles composed largely of diatom frustules and diatom fragments (phyto-detritus); however, the species feeds mainly on zooplankton after completion of the larval stage. We found, on average, 1.5 phyto-detrital particles per individual and 0.15 zooplankton particles per individual among early-stage larvae. Phyto-detritus was found in 47% of the larval guts analysed. Separated intact diatom frustules were rarely found, and the numbers were negligible. Twenty-nine percent of aggregates contained shreds of larvacean filters. Thus, larval E . antarctica feeds mainly on phyto-detritus, sinking particles containing larvacean houses and other aggregated particles. We also concluded that, unlike observations from previous studies, zooplankton were a less important food source for the early-stage larvae. This study provided fundamental knowledge about diet of biomass-dominant myctophid fish during the early larval stage, which contributes to our understanding of the life history of E. antarctica and also to oceanic food webs in the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
Nirazuka, S Makabe, R Swadling, KM Moteki, M |
author_facet |
Nirazuka, S Makabe, R Swadling, KM Moteki, M |
author_sort |
Nirazuka, S |
title |
Phyto-detritus feeding by early-stage larvae of Electrona antarctica (Myctophidae) off Wilkes Land in the Southern Ocean, Austral summer 2017 |
title_short |
Phyto-detritus feeding by early-stage larvae of Electrona antarctica (Myctophidae) off Wilkes Land in the Southern Ocean, Austral summer 2017 |
title_full |
Phyto-detritus feeding by early-stage larvae of Electrona antarctica (Myctophidae) off Wilkes Land in the Southern Ocean, Austral summer 2017 |
title_fullStr |
Phyto-detritus feeding by early-stage larvae of Electrona antarctica (Myctophidae) off Wilkes Land in the Southern Ocean, Austral summer 2017 |
title_full_unstemmed |
Phyto-detritus feeding by early-stage larvae of Electrona antarctica (Myctophidae) off Wilkes Land in the Southern Ocean, Austral summer 2017 |
title_sort |
phyto-detritus feeding by early-stage larvae of electrona antarctica (myctophidae) off wilkes land in the southern ocean, austral summer 2017 |
publisher |
Springer-Verlag |
publishDate |
2021 |
url |
https://doi.org/10.1007/s00300-021-02880-x http://ecite.utas.edu.au/144815 |
long_lat |
ENVELOPE(120.000,120.000,-69.000,-69.000) |
geographic |
Southern Ocean East Antarctica Austral Wilkes Land |
geographic_facet |
Southern Ocean East Antarctica Austral Wilkes Land |
genre |
Antarc* Antarctica E. Antarctica East Antarctica Polar Biology Southern Ocean Wilkes Land |
genre_facet |
Antarc* Antarctica E. Antarctica East Antarctica Polar Biology Southern Ocean Wilkes Land |
op_relation |
http://dx.doi.org/10.1007/s00300-021-02880-x Nirazuka, S and Makabe, R and Swadling, KM and Moteki, M, Phyto-detritus feeding by early-stage larvae of Electrona antarctica (Myctophidae) off Wilkes Land in the Southern Ocean, Austral summer 2017, Polar Biology, 44 pp. 1415-1425. ISSN 0722-4060 (2021) [Refereed Article] http://ecite.utas.edu.au/144815 |
op_doi |
https://doi.org/10.1007/s00300-021-02880-x |
container_title |
Polar Biology |
container_volume |
44 |
container_issue |
7 |
container_start_page |
1415 |
op_container_end_page |
1425 |
_version_ |
1766268574080434176 |