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Ptychoramphus aleuticus (Pallas, 1811)
Cassin's auklet
را بارگذاری کني تصاوير
تصوير گوگل |
No photo available for this species.No drawings available for Alcidae.
تصوير گوگل |
No photo available for this species.
رده بندی / Names اسامي عام | مترادف | CoL | ITIS | WoRMS
Aves | Charadriiformes | Alcidae
Environment: milieu / climate zone / تغييرات عمق / distribution range بوم شناسي
; تغييرات عمق 0 - 43 m (مرجع 65749), usually ? - 28 m (مرجع 61676). Polar; 62°N - 22°N, 171°E - 109°W (مرجع 125423)
Distribution كشورها | مناطق سازمان خوار و بار جهاني (FAO) | Ecosystems | ظهور | معرفي
Northwest and Eastern Pacific: From Aleutian Islands, Alaska, east to Canada and USA and south to Baja California, Mexico. Polar to subtropical.
Length at first maturity / Size / Weight / سن
بلوغ: Lm ? range ? - ? cm Max length : 23.0 cm TL جنس نر / بدون خواص جنسي; (مرجع 8812); بيشينه وزن گزارش شده: 188.00 g (مرجع 356)
توصيف مختصر ريخت شناسي
Culmen: 1.92 cm; tarsus: 2.66 cm; wing: 14.8 cm.
Total Length: 20 to 23 cm (Ref. 8812). Relatively small bird with sperm-storage glands that allows delayed fertilization (Ref. 87784). Found along the continental shelf; <150 km. Exhibits plunge diving behavior (Ref. 356). Relatively small bird. Based on stable isotope analysis (SIA) diet study of egg albumin, belongs to lower N signature group (based on ratios of stable isotopes of nitrogen and carbon) indicating a more planktivorous diet, indicative of more pelagic foraging range. Copulation occurring ashore and ovum fertilization happens at sea; delayed fertilization possible because of sperm-storage glands; allows birds to feed at sea while egg forms and prior to the long period of fasting during egg incubation. Yolk formation occurs at sea where daily yolk deposition rapidly increases to a sharp peak. Double-brooded and can raise two broods annually. Reproductive success may be linked to long duration of pair bonds. Nest is usurped by the larger Pigeon Guillemot (Cepphus columba) and Rhinoceros Auklet (Cerorhinca monocerata) by the destruction of its eggs and chicks. ENSO event of 1982-1983 saw absence of returning birds to Farallon Is. In central California to breed, possibly due to the death of many older breeders. Reduced breeding rates and clutch size are the identified sublethal effects of exposure to oil from spill accidents (Ref. 87784).
Life cycle and mating behavior بلوغ | تولید مثل | تخم ریزی | Eggs | Fecundity | Larvae
مآخذ اصلی
مراجع | هماهنگ كننده | همكاران
Gaydos, J.K. and N.A. Brown 2009 Species of concern within the Salish Sea marine ecosystem: changesfrom 2002 to 2008. In Proceedings of the 2009 Puget Sound Georgia Basin Ecosystem Conference e 8 to 11 February 2009. Seattle, WA: Environment Canada and the Puget Sound Partnership. 10 p. (مرجع 94794)
وضعيت در فهرست قرمز IUCN
(مرجع 130435: Version 2025-1)
نزديک به تهديد شدن (NT) (A2abce+3bce+4abce); Date assessed: 28 August 2020
وضعيت از نظر سايتس (مرجع 108899)
Not Evaluated
CMS (مرجع 116361)
Not Evaluated
خطر برای انسان ها
استفاده انسانی
| FishSource |
ابزارها
اطلاعات بيشتر
Trophic Ecology
بوم شناسي
Population dynamics
Life cycle
تولید مثل
بلوغ
Fecundity
تخم ریزی
Eggs
نمو تخم
Larvae
بلوغ
Fecundity
تخم ریزی
Eggs
نمو تخم
Larvae
Distribution
Physiology
Oxygen consumption
منابع اينترنتي
BHL | BOLD Systems | CISTI | DiscoverLife | FAO(Publication : search) | Fishipedia | GenBank (ژنوم, نوکلئوتيد) | GloBI | Gomexsi | Google Books | Google Scholar | Google | PubMed | Tree of Life | Wikipedia (برو, جستجو) | Zoological Record
Estimates based on models
Preferred temperature
(Ref. 115969): 4.6 - 9.8, mean 6.8 (based on 152 cells).
طبقه قيمت
(مرجع 80766):
Unknown.