Leopard Seals (Hydrurga leptonyx) in New Zealand Waters Predating on Chondrichthyans
Leopard seals (Hydrurga leptonyx) are top-order predators that prey on a wide variety of species including crustaceans, cephalopods, fishes, birds, and pinnipeds. While multiple diet studies have been conducted worldwide, there are no previous accounts of leopard seals predating on chondrichthyans....
Published in: | Frontiers in Marine Science |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Frontiers Media S.A.
2021
|
Subjects: | |
Online Access: | https://doi.org/10.3389/fmars.2021.795358 https://doaj.org/article/c7e7463fe0894f4fb8afdf058507a0d5 |
id |
ftdoajarticles:oai:doaj.org/article:c7e7463fe0894f4fb8afdf058507a0d5 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:c7e7463fe0894f4fb8afdf058507a0d5 2023-05-15T16:36:25+02:00 Leopard Seals (Hydrurga leptonyx) in New Zealand Waters Predating on Chondrichthyans Krista van der Linde Ingrid N. Visser Rick Bout Chris Lalas Lara Shepherd David Hocking Brittany Finucci Jim Fyfe Matthew Pinkerton 2021-12-01T00:00:00Z https://doi.org/10.3389/fmars.2021.795358 https://doaj.org/article/c7e7463fe0894f4fb8afdf058507a0d5 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2021.795358/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2021.795358 https://doaj.org/article/c7e7463fe0894f4fb8afdf058507a0d5 Frontiers in Marine Science, Vol 8 (2021) chondrichthyans diet elephantfish ghost shark leopard seal predation Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2021 ftdoajarticles https://doi.org/10.3389/fmars.2021.795358 2022-12-31T04:32:40Z Leopard seals (Hydrurga leptonyx) are top-order predators that prey on a wide variety of species including crustaceans, cephalopods, fishes, birds, and pinnipeds. While multiple diet studies have been conducted worldwide, there are no previous accounts of leopard seals predating on chondrichthyans. As part of a wider study on the diet of leopard seals in New Zealand (NZ) waters, researchers and citizen scientists recorded 39 observations of predation and collected 127 scats (166 total records) between 1942 and 2019. Predation on chondrichthyans was detected in 23.1% (n = 9) of observations of predation and 7.1% (n = 9) of scats (the latter via morphological examination and DNA sequencing). From both observations of predations and scats, three chondrichthyan species or genus were identified; elephantfish (Callorhinchus milii), ghost sharks (Hydrolagus spp.) and spiny dogfish (Squalus acanthias). While this is the first published record of leopard seals feeding on chondrichthyans, the relatively high frequency of occurrence within our NZ records, and that certain individuals appeared to target this type of prey, indicates that these species could constitute a substantial, or important, part of the diet for some leopard seals in this region. As chondrichthyans form an important part of the NZ marine ecosystems, our recognition of an additional top-order predator of these species contributes to understanding the overall health of, and future impacts of predators on, the wider NZ marine ecosystem. Article in Journal/Newspaper Hydrurga leptonyx Leopard Seal Leopard Seals spiny dogfish Squalus acanthias Directory of Open Access Journals: DOAJ Articles New Zealand Hydrurga ENVELOPE(-61.626,-61.626,-64.145,-64.145) Frontiers in Marine Science 8 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
chondrichthyans diet elephantfish ghost shark leopard seal predation Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
chondrichthyans diet elephantfish ghost shark leopard seal predation Science Q General. Including nature conservation geographical distribution QH1-199.5 Krista van der Linde Ingrid N. Visser Rick Bout Chris Lalas Lara Shepherd David Hocking Brittany Finucci Jim Fyfe Matthew Pinkerton Leopard Seals (Hydrurga leptonyx) in New Zealand Waters Predating on Chondrichthyans |
topic_facet |
chondrichthyans diet elephantfish ghost shark leopard seal predation Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
Leopard seals (Hydrurga leptonyx) are top-order predators that prey on a wide variety of species including crustaceans, cephalopods, fishes, birds, and pinnipeds. While multiple diet studies have been conducted worldwide, there are no previous accounts of leopard seals predating on chondrichthyans. As part of a wider study on the diet of leopard seals in New Zealand (NZ) waters, researchers and citizen scientists recorded 39 observations of predation and collected 127 scats (166 total records) between 1942 and 2019. Predation on chondrichthyans was detected in 23.1% (n = 9) of observations of predation and 7.1% (n = 9) of scats (the latter via morphological examination and DNA sequencing). From both observations of predations and scats, three chondrichthyan species or genus were identified; elephantfish (Callorhinchus milii), ghost sharks (Hydrolagus spp.) and spiny dogfish (Squalus acanthias). While this is the first published record of leopard seals feeding on chondrichthyans, the relatively high frequency of occurrence within our NZ records, and that certain individuals appeared to target this type of prey, indicates that these species could constitute a substantial, or important, part of the diet for some leopard seals in this region. As chondrichthyans form an important part of the NZ marine ecosystems, our recognition of an additional top-order predator of these species contributes to understanding the overall health of, and future impacts of predators on, the wider NZ marine ecosystem. |
format |
Article in Journal/Newspaper |
author |
Krista van der Linde Ingrid N. Visser Rick Bout Chris Lalas Lara Shepherd David Hocking Brittany Finucci Jim Fyfe Matthew Pinkerton |
author_facet |
Krista van der Linde Ingrid N. Visser Rick Bout Chris Lalas Lara Shepherd David Hocking Brittany Finucci Jim Fyfe Matthew Pinkerton |
author_sort |
Krista van der Linde |
title |
Leopard Seals (Hydrurga leptonyx) in New Zealand Waters Predating on Chondrichthyans |
title_short |
Leopard Seals (Hydrurga leptonyx) in New Zealand Waters Predating on Chondrichthyans |
title_full |
Leopard Seals (Hydrurga leptonyx) in New Zealand Waters Predating on Chondrichthyans |
title_fullStr |
Leopard Seals (Hydrurga leptonyx) in New Zealand Waters Predating on Chondrichthyans |
title_full_unstemmed |
Leopard Seals (Hydrurga leptonyx) in New Zealand Waters Predating on Chondrichthyans |
title_sort |
leopard seals (hydrurga leptonyx) in new zealand waters predating on chondrichthyans |
publisher |
Frontiers Media S.A. |
publishDate |
2021 |
url |
https://doi.org/10.3389/fmars.2021.795358 https://doaj.org/article/c7e7463fe0894f4fb8afdf058507a0d5 |
long_lat |
ENVELOPE(-61.626,-61.626,-64.145,-64.145) |
geographic |
New Zealand Hydrurga |
geographic_facet |
New Zealand Hydrurga |
genre |
Hydrurga leptonyx Leopard Seal Leopard Seals spiny dogfish Squalus acanthias |
genre_facet |
Hydrurga leptonyx Leopard Seal Leopard Seals spiny dogfish Squalus acanthias |
op_source |
Frontiers in Marine Science, Vol 8 (2021) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2021.795358/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2021.795358 https://doaj.org/article/c7e7463fe0894f4fb8afdf058507a0d5 |
op_doi |
https://doi.org/10.3389/fmars.2021.795358 |
container_title |
Frontiers in Marine Science |
container_volume |
8 |
_version_ |
1766026752710148096 |