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Bruger:JakobT/Sandkasse: Forskelle mellem versioner

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==Udseende==
[[File:Dusky dolphin NZ.jpg|thumb|250px|right|CloseupForenden ofaf front half of dusky dolphinskyggedelfin]]
[[File:Dusky dolphin NZ 2.jpg|thumb|250px|left|CloseupHalen ofaf back half of dusky dolphinskyggedelfin]]
 
 
The dusky dolphin pefers cool currents and inshore waters but can be found offshore. It feeds on a variety of [[fish]] and [[squid]] species and has flexible hunting tactics. The dusky dolphin is known for its remarkable acrobatics, having a number of [[Whale_surfacing_behaviour#Breaching.2C_lunging.2C_and_porpoising|aerial behaviors]]. The status of the dolphin is unknown but it has been commonly caught in [[gillnet|gill nets]].
 
Skyggedelfiner er mørkegrå eller sorte på ryggen og [[rygfinne]]n er karakteristisk tofarvet, med en mørk forkant og lysere bagkant. Skyggedelfin har en lang, lysegrå stribe på siden, der løber frem og ud på det korte, mørkegrå [[næb (delfiner|næb]]. Undersiden af kroppen er hvid og to hvide striber løber bagud på siden af kroppen ud til [[halefinne]]n.<ref>Webber, M.C. 1987. "A comparison of dusky and Pacific white-sided dolphins (genus . Lagenorhynchus): morphology and distribution". M.S. Thesis, San Francisco State Univeristy, San Franciso CA. 102 pp.</ref> Right between the white areas remains a characteristic thorn-shaped patch of dark colour, by which the species can easily be recognized. Aside from that, dusky dolphins may be confused with other members of their genus when observed at sea.
It can be distinguished from the [[common dolphin]]s, which have a more prominent and longer beak and yellow flank markings.
 
Skyggedelfin er en lille til middelstor [[delfin]], med bretragtelig variation i størrelse mellem de forskellige populationer. De største skyggedelfiner er fundet langs kysten af [[Peru]], hvor de kan blive op til 210&nbsp;cm lange og veje 100&nbsp;kg. Skyggedelfiner i [[New Zealand]]ske farvande bliver op til 167–178&nbsp;cm og 69–78&nbsp;kg for hunner og 165–175&nbsp;cm/70–85&nbsp;kg for hanner.<ref name= "Cipriano 1992">{{cite book |last=Cipriano |first=F. W. |year=1992 |title=Behavior and occurrence patterns, feeding ecology, and life history of dusky dolphins (''Lagenorhynchus obscurus'') off Kaikoura, New Zealand |type=Phd. Thesis |publisher=University of Arizona}}</ref> Der er stort set ingen forskel mellem hanner og hunner, men hannerne har en lidt mere krum [[rygfinne]], der er bredere ved roden og med større overflade.<ref name= "Perrin"/>
 
It can be distinguished from the [[common dolphin]]s, which have a more prominent and longer beak and yellow flank markings.<ref name=Menkhorst>{{cite book|last=Menkhorst|first=Peter|title=A Field Guide to Mammals of Australia|publisher=Oxford University Press|location=South Melbourne, Victoria|date=2001|pages=226-27|isbn=0-19-550870-X}}</ref> The skull of a dusky dolphin has a longer and narrower rostrum than that of a [[hourglass dolphintimeglasdelfin]] or [[Peale'sPeales dolphindelfin]] of similar age and size.<ref>Fraser, F. C. 1966: Comments on the Delphinoidea. In: "Whales, Dolphins and. Porpoises," K. S, Norris (Ed.), pp. 7-37, University of California Press. ISBN 0520032837 ▼
The dusky dolphin is small to medium in length compared with other species in the family. There is significant variation in size among the different population areas. The largest dusky dolphins have been encountered off the coast of Peru, where they are up to 210&nbsp;cm (6&nbsp;feet) in length and 100&nbsp;kg (210 pounds) in mass. The size for dusky dolphins in New Zealand have been recorded to be a length range of 167–178&nbsp;cm and a weight range of 69–78&nbsp;kg for females and a length range of 165–175&nbsp;cm and a weigh range of 70–85&nbsp;kg for males.<ref name= "Cipriano 1992">{{cite book |last=Cipriano |first=F. W. |year=1992 |title=Behavior and occurrence patterns, feeding ecology, and life history of dusky dolphins (''Lagenorhynchus obscurus'') off Kaikoura, New Zealand |type=Phd. Thesis |publisher=University of Arizona}}</ref> There is almost no [[sexual dimorphism]] in this species, although males have more curved dorsal fins with broader bases and greater surface areas.<ref name= "Perrin"/> The back of the dolphin is dark grey or black, and the [[dorsal fin]] is distinctively two-toned—the leading edge matches the back in color, but the trailing edge is a much lighter greyish white. Dusky dolphins have a long, light grey patch on their foreside leading to a short, dark grey beak. The throat and belly are white,<ref>Webber, M.C. 1987. "A comparison of dusky and Pacific white-sided dolphins (genus . Lagenorhynchus): morphology and distribution". M.S. Thesis, San Francisco State Univeristy, San Franciso CA. 102 pp.</ref> and the beak and lower jaw are dark grey. There are two blazes of white color running back on the body from the dorsal fin to the tail. Right between the white areas remains a characteristic thorn-shaped patch of dark colour, by which the species can easily be recognized. Aside from that, dusky dolphins may be confused with other members of their genus when observed at sea.
▲It can be distinguished from the [[common dolphin]]s, which have a more prominent and longer beak and yellow flank markings.<ref name=Menkhorst>{{cite book|last=Menkhorst|first=Peter|title=A Field Guide to Mammals of Australia|publisher=Oxford University Press|location=South Melbourne, Victoria|date=2001|pages=226-27|isbn=0-19-550870-X}}</ref> The skull of a dusky dolphin has a longer and narrower rostrum than that of a [[hourglass dolphin]] or [[Peale's dolphin]] of similar age and size.<ref>Fraser, F. C. 1966: Comments on the Delphinoidea. In: "Whales, Dolphins and. Porpoises," K. S, Norris (Ed.), pp. 7-37, University of California Press. ISBN 0520032837
</ref>
 
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