Strandings of northern bottlenose whales, Hyperoodon ampullatus, in the north-east Atlantic: seasonality and diet

R Fernandez, GJ Pierce, CD Macleod, A Brownlow, RJ Reid, E Rogan, M Addink, R Deaville, PD Jepson, MB Santos

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Peaks in northern bottlenose whale, Hyperoodon ampullatus, strandings are found between August and September in the UK and August and November in The Netherlands, consistent with a hypothesized southward migration. However, results on diet suggest that several whales stranded during these months were not travelling from northern latitudes prior to stranding. We analysed the stomach contents of ten whales stranded in the north-east Atlantic (Scotland, N ¼ 6, England, N ¼ 1, Ireland, N ¼ 2 and The Netherlands, N ¼ 1). All but one of the analysed whales (live-stranded in the River Thames in January 2006) stranded between August and October. Food remains consisted almost entirely of cephalopod mandibles. Twenty-one cephalopod species (16 families) were recorded, the most abundant taxa being Gonatus spp., Teuthowenia spp. and Taonius pavo. No fish and few crustacean remains were found. Small amounts of cephalopod flesh were found in three of the stomachs and none in the others. Given that cephalopod beaks can remain within the stomach for several days, and that there was no evidence of inshore feeding (no coastal species were present among the prey), the whales may not have fed for several days prior to stranding. Three whales had remains of warm-temperate water cephalopods (e.g. Vampyroteuthis infernalis, Heteroteuthis sp.) in their stomachs, while three individuals showed a high diversity of prey in their stomachs, suggesting that several of the whales could have been either travelling north or consistently feeding in temperate latitudes prior to stranding. As previously recorded in other deep diving teuthophagous cetaceans, two animals had ingested small amounts of plastic debris.
Original languageEnglish
Pages (from-to)1109 - 1116
Number of pages8
JournalJournal of the Marine Biological Association of the United Kingdom
Volume94
Issue number6
DOIs
Publication statusFirst published - 17 Jan 2014

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whales
Cephalopoda
stomach
diet
Netherlands
Pavo
beak
mouthparts
Ireland
Scotland
England
Hyperoodon
plastics
Crustacea
rivers
fish
animals
water

Keywords

  • Diet
  • Hyperoodon ampullatus
  • North-east Atlantic
  • Northern bottlenose whales
  • Seasonality
  • Strandings

Cite this

Fernandez, R ; Pierce, GJ ; Macleod, CD ; Brownlow, A ; Reid, RJ ; Rogan, E ; Addink, M ; Deaville, R ; Jepson, PD ; Santos, MB. / Strandings of northern bottlenose whales, Hyperoodon ampullatus, in the north-east Atlantic: seasonality and diet. In: Journal of the Marine Biological Association of the United Kingdom. 2014 ; Vol. 94, No. 6. pp. 1109 - 1116.
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abstract = "Peaks in northern bottlenose whale, Hyperoodon ampullatus, strandings are found between August and September in the UK and August and November in The Netherlands, consistent with a hypothesized southward migration. However, results on diet suggest that several whales stranded during these months were not travelling from northern latitudes prior to stranding. We analysed the stomach contents of ten whales stranded in the north-east Atlantic (Scotland, N ¼ 6, England, N ¼ 1, Ireland, N ¼ 2 and The Netherlands, N ¼ 1). All but one of the analysed whales (live-stranded in the River Thames in January 2006) stranded between August and October. Food remains consisted almost entirely of cephalopod mandibles. Twenty-one cephalopod species (16 families) were recorded, the most abundant taxa being Gonatus spp., Teuthowenia spp. and Taonius pavo. No fish and few crustacean remains were found. Small amounts of cephalopod flesh were found in three of the stomachs and none in the others. Given that cephalopod beaks can remain within the stomach for several days, and that there was no evidence of inshore feeding (no coastal species were present among the prey), the whales may not have fed for several days prior to stranding. Three whales had remains of warm-temperate water cephalopods (e.g. Vampyroteuthis infernalis, Heteroteuthis sp.) in their stomachs, while three individuals showed a high diversity of prey in their stomachs, suggesting that several of the whales could have been either travelling north or consistently feeding in temperate latitudes prior to stranding. As previously recorded in other deep diving teuthophagous cetaceans, two animals had ingested small amounts of plastic debris.",
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Strandings of northern bottlenose whales, Hyperoodon ampullatus, in the north-east Atlantic: seasonality and diet. / Fernandez, R; Pierce, GJ; Macleod, CD; Brownlow, A; Reid, RJ; Rogan, E; Addink, M; Deaville, R; Jepson, PD; Santos, MB.

In: Journal of the Marine Biological Association of the United Kingdom, Vol. 94, No. 6, 17.01.2014, p. 1109 - 1116.

Research output: Contribution to journalArticle

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T1 - Strandings of northern bottlenose whales, Hyperoodon ampullatus, in the north-east Atlantic: seasonality and diet

AU - Fernandez, R

AU - Pierce, GJ

AU - Macleod, CD

AU - Brownlow, A

AU - Reid, RJ

AU - Rogan, E

AU - Addink, M

AU - Deaville, R

AU - Jepson, PD

AU - Santos, MB

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AB - Peaks in northern bottlenose whale, Hyperoodon ampullatus, strandings are found between August and September in the UK and August and November in The Netherlands, consistent with a hypothesized southward migration. However, results on diet suggest that several whales stranded during these months were not travelling from northern latitudes prior to stranding. We analysed the stomach contents of ten whales stranded in the north-east Atlantic (Scotland, N ¼ 6, England, N ¼ 1, Ireland, N ¼ 2 and The Netherlands, N ¼ 1). All but one of the analysed whales (live-stranded in the River Thames in January 2006) stranded between August and October. Food remains consisted almost entirely of cephalopod mandibles. Twenty-one cephalopod species (16 families) were recorded, the most abundant taxa being Gonatus spp., Teuthowenia spp. and Taonius pavo. No fish and few crustacean remains were found. Small amounts of cephalopod flesh were found in three of the stomachs and none in the others. Given that cephalopod beaks can remain within the stomach for several days, and that there was no evidence of inshore feeding (no coastal species were present among the prey), the whales may not have fed for several days prior to stranding. Three whales had remains of warm-temperate water cephalopods (e.g. Vampyroteuthis infernalis, Heteroteuthis sp.) in their stomachs, while three individuals showed a high diversity of prey in their stomachs, suggesting that several of the whales could have been either travelling north or consistently feeding in temperate latitudes prior to stranding. As previously recorded in other deep diving teuthophagous cetaceans, two animals had ingested small amounts of plastic debris.

KW - Diet

KW - Hyperoodon ampullatus

KW - North-east Atlantic

KW - Northern bottlenose whales

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KW - Strandings

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DO - 10.1017/S002531541300180X

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JF - Journal of the Marine Biological Association of the United Kingdom

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