scholarly journals Evolutionary impacts differ between two exploited populations of northern bottlenose whale ( Hyperoodon ampullatus )

2019 ◽  
Vol 9 (23) ◽  
pp. 13567-13584
Author(s):  
Laura Joan Feyrer ◽  
Paul Bentzen ◽  
Hal Whitehead ◽  
Ian G. Paterson ◽  
Anthony Einfeldt
Keyword(s):  
Hyperoodon Ampullatus

First Confirmed Record of Northern Bottlenose Whale (Hyperoodon ampullatus) in Madeira Archipelago, Northeast Atlantic

2017 ◽  
Vol 43 (5) ◽  
pp. 474-478 ◽  
Author(s):  
Rita Ferreira ◽  
Filipe Alves ◽  
Claudia Gomes ◽  
Daniel Jardim ◽  
Judith Kok ◽  
...  
Keyword(s):  
Northeast Atlantic ◽  
Madeira Archipelago ◽  
Hyperoodon Ampullatus

Autumn Stranding of a Northern Bottlenose Whale (Hyperoodon ampullatus) in the Bay of Fundy, Nova Scotia

1975 ◽  
Vol 32 (7) ◽  
pp. 1019-1040 ◽  
Author(s):  
Edward Mitchell ◽  
V. Michael Kozicki
Keyword(s):  
Nova Scotia ◽  
Rhode Island ◽  
Growth Curve ◽  
North American ◽  
Labrador Sea ◽  
Bay Of Fundy ◽  
Winter Migration ◽  
Hyperoodon Ampullatus

A 615-cm male northern bottlenose whale (Hyperoodon ampullatus) stranded in Cobequid Bay, Bay of Fundy, in early October 1969. The skull, mandible, tympano-periotics, and teeth are described and illustrated. Five growth layers in the lower teeth place the animal below a growth curve based on samples from the Labrador Sea taken in May and June. A summary of nine other North American occurrences of 12 individuals, mainly south of Sable Island, indicates a winter migration to waters offshore of Massachusetts and Rhode Island.

Stomach contents of northern bottlenose whales Hyperoodon ampullatus stranded in the North Sea

2001 ◽  
Vol 81 (1) ◽  
pp. 143-150 ◽  
Author(s):  
M.B. Santos ◽  
G.J. Pierce ◽  
C. Smeenk ◽  
M.J. Addink ◽  
C.C. Kinze ◽  
...  
Keyword(s):  
The Netherlands ◽  
Stomach Contents ◽  
Important Species ◽  
North East ◽  
The North ◽  
Northern Latitudes ◽  
The North Sea ◽  
Fish Remains ◽  
Northern Bottlenose Whales ◽  
Hyperoodon Ampullatus

This paper presents information on the stomach contents of four northern bottlenose whales Hyperoodon ampullatus (Odontoceti: Ziphiidae) from the north-east Atlantic, an area for which there are few recent data on the feeding ecology of this species. Two of these whales were relatively recent strandings, a female stranded in August 1993 at Hargen (the Netherlands) and a male stranded in February 1997 on the island of Tåsinge (Denmark). Stomach content samples were also examined from a juvenile male stranded in November 1885 at Dunbar (Scotland) and a female stranded in August 1956 on the island of Texel (the Netherlands).  Food remains from the four samples consisted almost entirely of cephalopod beaks. Some fish remains were also found in the stomach of the Hargen and Tåsinge whales, and the latter also had crustacean remains in the stomach. The cephalopod prey consisted mainly of oceanic cephalopods: Gonatus sp. (probably G. fabricii, Cephalopoda: Teuthoidea), Taoniuspavo and Histioteuthis sp. for the Dunbar whale; Gonatus and Teuthowenia megalops for the Texel whale; Gonatus for the Hargen whale and Gonatus, T. megalops and Taonius pavo for the Tåsinge whale. Other prey species found in the Tåsinge specimen included the squid Histioteuthis reversa, H. arcturi, and the octopods Vampiroteuthis infernalis and Vitreledonella richardi. Based on the size of the lower beaks, the squid eaten included juvenile and mature individuals of the most important species (Gonatus and Teuthowenia megalops). The fish remains consisted of vertebrae of Gadidae and fish eye lenses (Hargen whale) and two Trisopterus otoliths (Tåsinge whale).  The results from this study are in agreement with those of previous authors in that cephalopods in general, and G. fabricii in particular, are the main prey of the northern bottlenose whale and other toothed whales in northern latitudes.

Heterogeneity and the mark–recapture assessment of the Scotian Shelf population of northern bottlenose whales (Hyperoodon ampullatus)

2005 ◽  
Vol 62 (11) ◽  
pp. 2573-2585 ◽  
Author(s):  
Hal Whitehead ◽  
Tonya Wimmer
Keyword(s):  
High Probability ◽  
Temporal Trend ◽  
Parametric Bootstrap ◽  
Estimation Procedure ◽  
Submarine Canyon ◽  
Mixed Population ◽  
Scotian Shelf ◽  
Mark Recapture ◽  
Northern Bottlenose Whales ◽  
Hyperoodon Ampullatus

A population of northern bottlenose whales (Hyperoodon ampullatus) inhabits the waters along the edge of the Scotian Shelf. The most important habitat of this population is the Gully, a large submarine canyon, where animals were photographically identified between 1988 and 2003. Open mark–recapture models, including mixture models that allow for heterogeneity in identifiability and (or) mortality among individuals, were fitted to identification-history data. Models without heterogeneity in identifiability had poor fit to the data and underestimated population size. The population is estimated to contain about 163 animals (95% confidence interval 119–214), with no statistically significant temporal trend. About 12% of the population has a high probability of being identified within the Gully in any year. Many of them are mature males. The remainder is less likely to be identified in the Gully during any year, spend generally shorter periods in the Gully even in years when they are found, and are more likely to be female. This and other work indicate a poorly mixed population inhabiting the canyons and other deeper waters off the Scotian Shelf. Non parametric bootstrap methods were used to validate the estimation procedure and to estimate the efficiency of future fieldwork scenarios.

Characteristics of biosonar signals from the northern bottlenose whale,Hyperoodon ampullatus

2011 ◽  
Vol 130 (5) ◽  
pp. 3077-3084 ◽  
Author(s):  
Magnus Wahlberg ◽  
Kristian Beedholm ◽  
Anders Heerfordt ◽  
Bertel Møhl
Keyword(s):  
Hyperoodon Ampullatus

Stomach Contents of a Northern Bottlenose Whale (Hyperoodon Ampullatus) Stranded at Hiddensee, Baltic Sea

1998 ◽  
Vol 78 (2) ◽  
pp. 643-650 ◽  
Author(s):  
Roland Lick ◽  
Uwe Piatkowski
Keyword(s):  
Baltic Sea ◽  
Stomach Contents ◽  
Mantle Length ◽  
Fish Parasite ◽  
Fish Remains ◽  
Hyperoodon Ampullatus

The stomach of a female northern bottlenose whale, Hyperoodon ampullatus (Odontoceti: Ziphiidae) stranded at Hiddensee Island, western Baltic Sea, on 23 August 1993 contained 7465 cephalopod beaks (4934 upper and 2531 lower). The lower beaks were identified, their rostral lengths were measured and used to estimate size and mass of the cephalopods consumed by the whale. All lower beaks belonged to one species, the boreoatlantic gonate squid Gonatus fabricii (Cephalopoda: Teuthoidea) indicating a mean squid mantle length of 21·9 cm and a mean squid wet mass of 220·7 g. The total squid biomass in the whale's stomach represented by the lower beaks was 598·6 kg. Assuming that all upper beaks belong to G. fabricii, the squid biomass taken by the whale was estimated to be 1089 kg. Besides the beaks partly digested squid gladii, spermatophores and 15 specimens of the fish parasite Sphyrion lumpi (Crustacea: Copepoda) occurred in the stomach. No fish remains were found.

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