Yellow-eyed penguin / hoiho Megadyptes antipodes Distribution - - PowerPoint PPT Presentation

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Oct 07, 2022 152 likes •432 views

Yellow-eyed penguin / hoiho Megadyptes antipodes Distribution Distribution Almost all species information originates from mainland Foraging behaviour Foraging behaviour 275 of 300 dives went to seafloor Total trip duration: 11.6 hrs Time

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Yellow-eyed penguin / hoiho

Megadyptes antipodes

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Distribution

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Distribution

Almost all species information originates from mainland

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Foraging behaviour

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275 of 300 dives went to seafloor Total trip duration: 11.6 hrs Time spent at seafloor: 5.5 hrs

Foraging behaviour

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Yellow-eyed penguin diet

van Heezik (1990a) Otago, Catlins (1984-1986) van Heezik (1990b) Whenua Hou (1984) Moore & Wakelin (1997) Otago Peninsula, Long Point (Catlins) Browne et al. (2011) Stewart Is/Rakiura, Whenua Hou (2007)

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Red cod

Pseudophycis bacchus

Dominant prey species

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Blue cod

Parapercis colias

Dominant prey species

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Opalfish

Hemerocoetes monopterygius

Dominant prey species

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Slender sprat

Sprattus antipodum

Other prey

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Arrow squid

Nototodarus sloani

Other prey

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Silverside

Argentina elongata

Ahuru

Auchenoceros punctatus

Tarakihi

Nemadactylus macropterus

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Blue cod capture

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Opalfish capture

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Jellyfish harvesting

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Prey composition

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Red Cod

Slender sprat

Prey composition

Opalfish

1984-86

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Opalfish

Blue cod

Prey composition

1991-93

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Opalfish

Blue cod

Prey composition

1984

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Blue cod

Prey composition

2006

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Prey composition

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Prey composition

2.0 2.0 1.27 1.83 1.40 1.31 1.0 breeding success

chicks/pair

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too big to swallow for chicks

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Recommendations

1. Foraging monitoring programme
2. Non-invasive diet monitoring (i.e. faecal DNA, cameras)
3. Stable isotope screening programme & database (blood & feathers)
4. Catch up on YEP foraging ecology & diet in sub-Antarctic populations