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Ptychoramphus - Species in
Alcidae - - Classification -
- Alcidae
- Charadriiformes
- Aves
- Chordata
- Animalia
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Ptychoramphus aleuticus (Pallas, 1811)
Cassin's auklet
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Classification / Names Κοινά ονόματα | Συνώνυμα | CoL | ITIS | WoRMS
Aves | Charadriiformes | Alcidae
Environment: milieu / climate zone / εύρος βάθους / distribution range Οικολογία
; εύρος βάθους 0 - 43 m (Αναφ. 65749), usually ? - 28 m (Αναφ. 61676). Polar; 62°N - 22°N, 171°E - 109°W (Αναφ. 125423)
Distribution Χώρες | Περιοχές FAO | Οικοσυστήματα | Παρουσίες | Εισαγωγές
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 / Μέγεθος / Weight / Age
Γεννητική Ωρίμανση: Lm ? range ? - ? cm Max length : 23.0 cm TL αρσενικό/απροσδιόριστο; (Αναφ. 8812); μεγ. δημοσιευμένο βάρος: 188.00 g (Αναφ. 356)
Short description Μορφολογία
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 Γεννητική Ωρίμανση | Αναπαραγωγή | Γεννοβολία | Eggs | Γονιμότητα | Larvae
Main reference
Αναφορές | Συντονιστής | Συνεργάτες
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. (Αναφ. 94794)
IUCN Red List Status
(Αναφ. 130435: Version 2025-1)
Near Threatened (NT) (A2abce+3bce+4abce); Date assessed: 28 August 2020
CITES status (Αναφ. 108899)
Not Evaluated
CMS (Αναφ. 116361)
Not Evaluated
Threat to humans
Human uses
| FishSource |
Εργαλεία
Περισσότερες πληροφορίες
Τροφική Οικολογία
Οικολογία
Population dynamics
Life cycle
Αναπαραγωγή
Γεννητική Ωρίμανση
Γονιμότητα
Γεννοβολία
Eggs
Egg development
Larvae
Γεννητική Ωρίμανση
Γονιμότητα
Γεννοβολία
Eggs
Egg development
Larvae
Distribution
Physiology
Κατανάλωση οξυγόνου
Human Related
Stamps, coins, misc.
Outreach
Αναφορές
Διαδικτυακές πηγές
BHL | BOLD Systems | CISTI | DiscoverLife | FAO(Publication : search) | Fishipedia | GenBank (genome, nucleotide) | GloBI | Gomexsi | Google Books | Google Scholar | Google | PubMed | Δέντρο Ζωής | Wikipedia (Go, αναζήτηση) | Zoological Record
Estimates based on models
Preferred temperature
(Ref. 115969): 4.6 - 9.8, mean 6.8 (based on 152 cells).
Price category
(Αναφ. 80766):
Unknown.