Seasonal Appearences of Short-tailed (Puffinus tenuirostris) and Sooty (Puffinus griseus) Shearwaters on the Tokyo-Kushiro Line, Japan

Watabe, Yoshiki; Oka, Nariko; Maruyama, Naoki

doi:10.3312/jyio1952.19.117

Cited by 5 publications

(4 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At least 1 possible return route occurs along the coasts of Canada and northwestern United States, in the California Current region, where short-tailed shearwater sightings are greatest from September through January (Baltz & Morejohn 1977). There are few birds in Japanese waters from September to November, the prospected time when short-tailed shearwaters are headed southward during their return to breeding colonies (Watabe et al 1987). A more direct route has been proposed in which shearwaters move northward in broad fronts directly toward the Northwest Pacific and progress rapidly through the equatorial western Pacific (Shuntov 1974), but there is little evidence (from sighting or net entrapment data) to support this pattern of movement.…”

Section: Estimation Of Flight Rangesmentioning

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%

See 1 more Smart Citation

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

Baduini

Lovvorn²,

Hunt³

2001

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

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.

show abstract

Section: Estimation Of Flight Rangesmentioning

confidence: 99%

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.

View full text Add to dashboard Cite

show abstract

“…Since the juveniles depart later than the adults, they also arrive later at their overwintering sites in the North Pacific than the adults (Marchant & Higgins 1990). Large flocks of birds (presumably adults, judging from the departure schedule from the breeding grounds) first appear along northern Japanese coasts in the westernmost North Pacific in late April to early May (Niizuma & Shibano 1983, Watabe et al 1987, and they first appear in the Bering Sea around the end of April (Shuntov 1974). Large flocks of fledglings appeared in Japanese waters from around 20 May to early June (Oka 1986).…”

Section: Study Animalsmentioning

confidence: 99%

Nutrient reserve difference between young and adult Short-tailed Shearwaters, Puffinus tenuirostris, before and after trans-equatorial migration

Oka¹

2008

PPRST

View full text Add to dashboard Cite

The Short-tailed Shearwater, Pujfinus tenuirostris, is a trans-equatorial migrant, breeding in Tasmania and ocher parts of southeastern Australia during the Austral summer and migrating to the northern North Pacific for the Boreal summer. Juveniles, in particular, suffer considerable mortality during the migration. Body composition of juveniles and adults in terms of body mass, lipid content, pecmral muscle mass and bone marrow content, before and after migration was investigated. Juveniles varied greacly in body composition pre-and post-migration and took longer to recover their nutritional status than adults. Adulcs sustained a better body composition, showing a moderate decrease in body fat upon arrival in the nortb and recovering their body mass and lipid supply during their stay. The lipid content of beachcast bird carcasses (mean, 4 g) was the minimum necessary for cell membranes and was not metabolisable for energy. Pectoral muscle protein remained high among birds under hyper-nutritional conditions, and decreased gradually at first as lipids decreased, and then rapidly at lace malnutritional stages when most lipids had been utilised for energy. Althm1gh adulcs sustained their nutritional status, the amount of lipids in adulcs leaving the Tasmanian colony was insufficient to accomplish the long-distance migration, so post-breeding adults probably first visited Antarctic waters ro accumulate fat reserves before commencing their northward migration. Key Words: age group, body composition, fat deposit, marrow, nutritive difference, pectoral muscle, protein, Puffinus tenuirostris, Short-tailed Shearwater, trans-equatorial migrant. INTRODUCTIONLong-distance migrations through areas with poor nutrient productivity are critical events for some animals. Recent evidence has shown that the Sooty Shearwater, Pujfinus griseus (J.F. Gmelin, 1789), a New Zealand trans-equatorial migratory seabird, traversed low-latitude waters with low productivity at mean speeds as high as 910 km per day while rarely foraging (Shaffer et al. 2006). To accomplish these long journeys without refueling, they must have sufficient energy reserves, though the storage abilities of most birds are limited by the constraints of fl ight and wing loading.The Short-tailed Shearwater, Puj finus tenu irostris (Temminck, 1835), which breeds in Tasmania and other parts of southeastern Australia during the Austral summer (October to April), migrates one of the longest distances of any migratory bird, annually completing a trans-equatorial migration to spend the Boreal summer (May to September) in the highly productive waters of the northern North Pacifi c, Okhotsk Sea and Bering Sea (Serventy et al. 1971, Shuntov 1974, Warham 1996. This species has evolved a feeding apparatus that allows it to take small marine animals effectively (Morgan & Ritz 1982), which are sparsely distributed in tropical and sub-tropical oceans along its migratory pathway (Reid 1962). Thus, the survival of the migrants may depend greatly on energy deposits acquired before depart...

show abstract

“…Short-tailed Shearwaters breed in southeastern Australia and Tasmania and migrate to the North Pacific in the non-breeding season. During migration, part of the population passes along the coast of northern Japan between April and June (Serventy 1953;Shuntov 1974;Degawa & Watabe 1983;Watabe et al 1987). In this area, Euphausia pacifica is an abundant zooplankton species and is considered to be a key species in food web among marine organisms (Taki et al 1996;Taki 1998).…”

mentioning

confidence: 99%

Foraging areas of Short-tailed Shearwaters during their northward migration along the Pacific coast of northern Japan

Ito

2002

Ornithol. Sci.

View full text Add to dashboard Cite

Seasonal Appearences of Short-tailed (Puffinus tenuirostris) and Sooty (Puffinus griseus) Shearwaters on the Tokyo-Kushiro Line, Japan

Cited by 5 publications

References 9 publications

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

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

Nutrient reserve difference between young and adult Short-tailed Shearwaters, Puffinus tenuirostris, before and after trans-equatorial migration

Foraging areas of Short-tailed Shearwaters during their northward migration along the Pacific coast of northern Japan

Contact Info

Product

Resources

About