altricial


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Related to altricial: precocial

altricial

[‚al′trish·əl]
(vertebrate zoology)
Pertaining to young that are born or hatched immature and helpless, thus requiring extended development and parental care.
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References in periodicals archive ?
A note on the evolution of clutch size in altricial birds.
The 3 months of biparental care of their single altricial chick is followed by 9-14 months of uniparental care by the mother (Diamond, 1972, 1973; osorno, 1999; Osorno and Szekely, 2004).
Thus, the altricial newborn must adapt to a highly variable
feeding and cleansing of the young), which is obligatory in mammals (and among birds with altricial young), and are particularly suited for group cohesion.
Since during the first two weeks of life it is not possible to isolate altricial pups of C.
FL Recent fledglings (of altricial species) or downy young (of precocial species such as galliformes, shorebirds or waterfowl) confirm breeding.
The most significant modification in humans compared to other extant primates is altricial birth, which is the birth of helpless newborns (as opposed to precocial birth in species like chimps and horses).
the need to support an altricial (completely helpless) newborn may even have contributed to the evolution of bipedalism (walking on two legs)," says Katherine Dettwyler, PhD.
El neonato de lobo, al ser una especie altricial, nace con los ojos y los canales auditivos cerrados (1,2,4,5,6,7).
What, in the bird and animal worlds, are the meanings of the opposing terms altricial and precocial?
9) The young of mammals are described as being either precocial or altricial.
Altricial (ahl-trish-ahl) Young that are very dependent after birth; kittens are altricial.