The pelagic feeding ecology of the Short-tailed Shearwater Puffinus tenuirostris in the Subarctic Pacific Region

Ogi, Haruo; Kubodera, Tsunemi; Nakamura, Kazue

doi:10.3312/jyio1952.12.3_157

Cited by 55 publications

(60 citation statements)

References 16 publications

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“…Those exhausted young found dead in Japan may have been insufficiently fed by their parents in the rookeries. The diet of this species consists of krill, squid and small fish in the North Pacific (OGI et al, 1980). A similar diet for this species has also been reported in the breeding waters.…”

Section: Discussionmentioning

confidence: 80%

Mass Mortality of Short-tailed Shearwaters along the Japanese Coast

Oka

Maruyama²

1986

Japanese Journal of Ornithology

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Section: Discussionmentioning

confidence: 80%

Mass Mortality of Short-tailed Shearwaters along the Japanese Coast

Oka

Maruyama²

1986

Japanese Journal of Ornithology

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“…Short-tailed shearwaters feed mainly in daylight [20]. Birds were entangled in the gill nets during the night, so their empty stomachs might simply reflect decreased foraging activity during the night or come from a local and opportunistic shortterm absence of prey.…”

Section: Discussionmentioning

confidence: 99%

The relationship between pink salmon biomass and the body condition of short-tailed shearwaters in the Bering Sea: can fish compete with seabirds?

et al. 2011

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Seabirds and large fishes are important top predators in marine ecosystems, but few studies have explored the potential for competition between these groups. This study investigates the relationship between an observed biennial change of pink salmon (Oncorhynchus gorbuscha) biomass in the central Bering Sea (23 times greater in odd-numbered than in even-numbered years) and the body condition and diet of the short-tailed shearwater (Puffinus tenuirostris) that spends the post-breeding season there. Samples were collected with research gill nets over seven summers. Both species feed on krill, small fishes and squid. Although the mean pink salmon catch per unit effort (in mass) over the study region was not related significantly with shearwater's stomach content mass or prey composition, the pink salmon biomass showed a negative and significant relationship with the shearwater's body mass and liver mass (proxies of energy reserve). We interpret these results as evidence that fishes can negatively affect mean prey intake of seabirds if they feed on a shared prey in the pelagic ecosystem.

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“…Shearwaters were observed foraging on juvenile (age-0 class) walleye pollock Theragra chalcogramma in the area of the middle southeastern Bering Sea shelf, southwest of Cape Newenham, in 1998 and not in 1997. Usually, the diet of short-tailed shearwaters in the southeastern Bering Sea is dominated by adult euphausiids, primarily Thysanoessa raschii (Hunt et al 1996, Ogi 1980. A lack of euphausiids in nearshore surface waters or a shift in their horizontal and vertical distribution in 1997 may have made it difficult for short-tailed shearwaters to obtain sufficient resources (Baduini et al 2001).…”

Section: Comparisons Of Body Condition Among Seasonsmentioning

confidence: 99%

“…Upon leaving the colony at Cape Woolami in southeast Australia, adult short-tailed shearwaters have minimum flight ranges of 2080 km and maximum ranges of 8320 km (Table 3). Although the exact migration route is unknown and has been a topic of speculation for some time, it has been proposed that when short-tailed shearwaters are headed toward wintering grounds in the northern hemisphere, they migrate northward along the western side of the North Pacific Ocean toward Japanese waters, where the number of birds is greatest during April through June (Ogi et al 1980, Oka & Maruyama 1986, Watabe et al 1987, Minami et al 1995. From Japanese waters, short-tailed shearwaters move toward the Bering and Chukchi Seas, where they spend the months of May though October feeding.…”

Section: Estimation Of Flight Rangesmentioning

confidence: 99%

Determining the body condition of short-tailed shearwaters: implications for migratory flight ranges and starvation events

Baduini

Lovvorn²,

Hunt³

2001

Mar. Ecol. Prog. Ser.

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Short-tailed shearwaters Puffinus tenuirostris migrate annually from breeding areas in southeast Australia and Tasmania to the Bering Sea to feed on abundant prey aggregations, mainly euphausiids. Occasionally thousands of shearwaters die of starvation en route, within, or on return from the Bering Sea. Collection of live and dead shearwaters in the southeastern Bering Sea in 1997, 1998, and 1999 allowed us to measure seasonal changes in energy reserves during a major mortality event. As birds lost body mass, lipid mass initially decreased faster than that of pectoralis muscle, but loss of pectoralis mass increased markedly at a body mass around 500 g when lipids were almost depleted (~33 g remaining). Death occurred as body mass approached 426 g. Individuals near this body mass had lipid values permitting estimated flight ranges of 140 to 400 km, a range less than that potentially covered in 1 d by shearwaters searching for prey (440 to 1124 km d -1 ). Seasonal differences in body composition were most striking among body and bone marrow lipid contents, with the lowest values occurring during the die-off in fall 1997 and in fall 1998. The lack of shearwater mortality in fall 1998 may have resulted from more consistent winds that decreased flight costs and from greater availability of alternative fish prey. Our data allow estimates of usable energy stores and flight ranges based on lipid reserves in short-tailed shearwaters. Estimated flight ranges suggest that if feeding conditions are poor near Japan or near other termination points of the transequatorial migration routes shearwaters may have few reserves available to support foraging for food and starvation events may occur. Our findings suggest how their energetic strategies and migration are shaped by seasonal and annual variability of prey during transglobal movements of short-tailed shearwaters between oceanic regions.

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The pelagic feeding ecology of the Short-tailed Shearwater Puffinus tenuirostris in the Subarctic Pacific Region

Cited by 55 publications

References 16 publications

Mass Mortality of Short-tailed Shearwaters along the Japanese Coast

Mass Mortality of Short-tailed Shearwaters along the Japanese Coast

The relationship between pink salmon biomass and the body condition of short-tailed shearwaters in the Bering Sea: can fish compete with seabirds?

Determining the body condition of short-tailed shearwaters: implications for migratory flight ranges and starvation events

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