Diferenzas entre revisións de «Erignathus barbatus»

== Reprodución e forma de vida ==
[[Ficheiro:Beardedsealpup.jpg|miniatura|esquerda|Cría de foca barbuda]]
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Bearded seals give birth in the spring. In the [[Northern Canada|Canadian Arctic]], seal pupping occurs in May.<ref name="uoguelph"/> In Svalbard, bearded seals reach [[sexual maturity]] at 5 or 6 years of age.<ref>Andersen, Magnus, et al. "[https://brage.bibsys.no/xmlui/bitstream/handle/11250/174308/AndersenPolarBiol1999.pdf?sequence=1 Growth, age at sexual maturity and condition in bearded seals (Erignathus barbatus) from Svalbard, Norway]." Polar Biology 21.3 (1999): 179-185.</ref> Further south, in [[Alaska]], most pups are born in late April.{{clarify|reason=See talk page|date=March 2013}} Pups are born on small drifting ice floes in shallow waters, usually weighing around {{convert|30|–|40|kg|abbr=on}}. They enter the water only hours after they are born, and quickly become proficient divers. Mothers care for the pups for 18–24 days, during which time the pups grow at an average rate of {{convert|3.3|kg|abbr=on}} per day. During this time, pups consume an average of {{convert|8|l|abbr=on}} of milk a day. By the time they are weaned, the pups have grown to about {{convert|100|kg|abbr=on}}.
 
As focas barbudas dan a luz na primavera. No áerico canadense, as crías nacen en maio.<ref name="uoguelph"/> En Svalbard, chegan á madureza sexual aos 5 ou 6 anos de idade.<ref>Andersen, Magnus, et al. "[https://brage.bibsys.no/xmlui/bitstream/handle/11250/174308/AndersenPolarBiol1999.pdf?sequence=1 Growth, age at sexual maturity and condition in bearded seals (Erignathus barbatus) from Svalbard, Norway]." Polar Biology 21.3 (1999): 179-185.</ref> Paren as crías en pequenos xeos flotantes en augas pouco profundas, as cales adoitan pesar de 30 a 40&nbsp;kg. Entran na auga só unhas horas despois de que nacen e rapidamente se converten en hábiles mergulladores. As nais coidan as crías durante de 18 a 24 días, durante os cales estas aumentan uns 3,3&nbsp;kg de media por día. Durante este tempo, as cías toman unha media de 8&nbsp;L de leite diarios. No momentodo destete pesan the uns 100&nbsp;kg.
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Just before the pups are weaned, a new mating cycle takes place. Females ovulate at the end of their lactation period, but remain close to their pups, ready to defend them if necessary. During the mating season, male seals will "sing," emitting a long-drawn-out warbling note that ends in a sort of moan or sigh. This sound may attract females, or may be used by the males to proclaim their territory or their readiness for breeding. Males occupy the same areas from one year to the next.<ref>{{cite book | title = Encyclopedia of the Arctic | author = Nuttal | publisher = Routlelege | location = New York, NY | year = 2005|display-authors=etal}}</ref>
 
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