Mammalia |
Cetartiodactyla |
Eschrichtiidae
Ambiente: milieu / zona climatica / distribuzione batimetrica / gamma di distribuzione
Ecologia
Pelagico; oceanodromo (Fonte Biblio. 75906); distribuzione batimetrica 1 - 2500 m, usually 30 - 500 m. Tropical; 90°N - 0°S, 115°E - 105°W
Pacific Ocean, Atlantic Ocean and the Arctic: Extinct in North Atlantic; two populations in North Pacific. Tropical to polar. [western population: IUCN 2010 (Ref. 84930): CR, C2a(ii);E.]
Lunghezza alla prima maturità / Dimensione / Peso / Età
Maturità: Lm 1,220.0 range ? - ? cm Max length : 1,500 cm TL maschio/sesso non determinato; (Fonte Biblio. 1394); peso massimo pubblicato: 35.0 t (Fonte Biblio. 1394); Età massima riportata: 48 anni (Fonte Biblio. 128170)
Lives within a few tens of kilometers of shore. Bottom feeders that feed primarily on swarming mysids and tube-dwelling amphipods in the northern parts of their range, but are also known to take red crabs, baitfish, and other food opportunistically. The North Atlantic stock was apparently wiped-out by whalers in the 18th century. A western North Pacific (Korean) stock may also have been extirpated in the mid 20th century; its continued existence as a small remnant is still debated. The eastern North Pacific (California-Chukotka) stock nearly suffered the same fate twice, once in the late 1800s and again in the early 1900s. Both times, a respite in commercial whaling allowed the population to recover. About 170 to 200 from this latter stock are killed annually under special permit by commercial whalers on behalf of Soviet aborigines, and one or a few are taken in some years by Alaskan Eskimos. Since receiving IWC protection in 1946 and the end of research harvests in the late 1960s this population has increased, and now apparently equals or exceeds pre-exploitation numbers (Ref. 1394). Lives within a few tens of kilometers of shore. Bottom feeders that feed primarily on swarming mysids and tube-dwelling amphipods in the northern parts of their range, but are also known to take red crabs, baitfish, and other food opportunistically (Ref. 1394).
Ciclo vitale e comportamento di accoppiamento
Maturità | Riproduzione | Deposizione | Uova | Fecondità | Larve
Jefferson, T.A., S. Leatherwood and M.A. Webber 1993 FAO species Identification Guide: Marine Mammals of the World. Rome, FAO. 320 p. + 587 figures. (Fonte Biblio. 1394)
Stato della Lista Rossa IUCN
(Fonte Biblio. 130435: Version 2025-2 (Global))
Stato della CITES (Fonte Biblio. 108899)
CMS (Fonte Biblio. 116361)
Not Evaluated
Minaccia per l'uomo
Usi umani
Pesca: commerciale
FAO - pesca: profilo della specie, landings search; Publication: search | FishSource | Sea Around Us
Strumenti
Informazioni ulteriori
Dinamica della popolazione FisiologiaConsumo di ossigeno
Legato all'uomoFrancobolli, monete, materiale vario.
Fonti Internet
Stime basate su modelli
Resilienza
(Ref. 69278): |
Medio, tempo minimo di raddoppiamento della popolazione 1.4 - 4.4 anni (K=0.19-0.25; tm=8; tmax=48) |
Vulnerabilità della pesca
(Fonte Biblio. 71543) |
Very high vulnerability (79 of 100). |
Categoria di prezzo
(Fonte Biblio. 80766): |
Unknown. |
