Altricial young are born helpless and require care for a length of time. Positive: 50 % Answer #5 | 19/06 2016 15:38 The larval stage of insect development is considered by some to be a form of altricial development, but it more accurately depicts, especially amongst eusocial animals, an independent phase of development, as the larvae of bees, ants, and many arachnids are completely physically different from their developed forms, and the pre-pupal stages of insect life might be regarded as equivalent to vertebrate embryonic development. They come from many sources and are not checked. This may be related to r/K selection; however, this association fails with a number of cases. altricial (plural altricials) Such an animal ; See also . Altricial birds include herons, hawks, woodpeckers, owls, cuckoos and most passerines. The young are semi-altricial, and covered in white down when they emerge from the egg. But few of the bits are working, and a baby is completely helpless on its own. altricial . Altricial animals produce large number of offspring with a relatively small energetic investment in each one; therefore, the offspring are born pretty weak and many will probably die. Human children, and those of other primates, exemplify a unique combination of altricial and precocial development. Altricial Hatched with eyes closed, with little or no down, incapable of departing from the nest, and fed by the parents. [7], In birds, the terms Aves altrices and Aves precoces were introduced by Carl Jakob Sundevall (1836) and the terms nidifugous and nidicolous by Lorenz Oken in 1816. Altricial birds (also known as nidicolous birds) remain in the nest and depend on their parents for food, heat, and protection. Therefore, most of the development that you see in an infant is that which would “normally” take place in the womb. A hastier alternative is employed by precocial animals, in which the young have open eyes, have hair or down, have large brains, and are immediately mobile and somewhat able to flee from, or defend themselves against, predators. View more posts. As I study nature and the natural world, more similarities appear between human and non-human animals and the language used to describe one becomes appropriate to describe the other. Showing page 1. Different animals employ different precocial and altricial strategies; as stated above, some employ elements of both strategies, and as a result the distinction between the two is by some held in question. Be warned. Precocial is an adjective describing an animal that is ready to take care of itself right after… springer. In fact, up until it reaches eight months to a year of age, it is much more consistent with developmental understandings to see any baby as a prematurely born infant. The two classifications were considered identical in early times, but the meanings are slightly different, in that "altricial" and "precocial" refer to developmental stage, while "nidifugous" and "nidicolous" refer to leaving or staying at the nest. For example, with ground-nesting birds such as ducks or turkeys, the young are ready to leave the nest in one or two days. They come from many sources and are not checked. The word is derived from the Latin root alere meaning "to nurse, to rear, or to nourish", and refers to the need for young to be fed and taken care of for a long duration. “When we discuss life history of animals, we discuss them as altricial or precocial. In altricial birds, parents are assumed to optimize the total food delivery to the brood given the time constraints set by self-feeding and food collecting. add translation add translation; Links. having young which are helpless at birth. Übersetzen Sie online den Begriff altricial nach Englisch und downloaden Sie jetzt unseren kostenlosen Übersetzer. Among mammals, most ungulates are precocial, being able to walk almost immediately after birth. Portuguese: altricial; Noun . With its hair, blue eyes, and large head, a baby looks precocial. [1], It has been suggested that this article be, Species in which the young are minimally-capable of independent movement soon after hatching or birth, The altricial-precocial spectrum in birds, https://en.wikipedia.org/w/index.php?title=Altriciality&oldid=993680889, Wikipedia articles needing page number citations from July 2014, Short description is different from Wikidata, Creative Commons Attribution-ShareAlike License, This page was last edited on 11 December 2020, at 22:30. cial (ăl-trĭsh′əl) adj. Beyond the precocial are the superprecocial animals, such as the megapode birds, which hatch with full flight feathers. That means a large energetic investment goes into each offspring; they usually reproduce one at a time and their offspring are born pretty ready to handle a lot on their own. Example sentences with "altricial", translation memory. The chicks are altricial and downy, and are fed by both parents. Our reproductive strategy looks like that of a precocial species – one progeny at a time and a substantial resource investment in each – but our infants resemble altricial infants much more than precocial ones. Altricial animals also tend to be helpless, unable to move around like mature adults and dependent on others for support, food, shelter, and companionship. Translation memories are created by human, but computer aligned, which might cause mistakes. Human life history only make sense if you look at human infants as fetuses that are continuing to develop outside the womb, and happen to have been born prematurely. Such restrictions are typical of the altricial human primate, whose offspring stay immature longer than other mammals [84, 85]. Altricial young are typical among carnivores, ... Penguin 2012, p. 281: First, humans are altricial, with immature newborns and a long childhood. This combination of large bodies, small relative brain size, and extreme motor immaturity makes human infants costly creatures to carry around and to parent. Precocial birds are able to provide protein-rich eggs and thus their young hatch in the fledgling stage – able to protect themselves from predators and the females have less post-natal involvement. The skill of the parents to provide care and attend directly to the pre-natal and post-natal development of their young appears to be associated. Although the words are usually applied to birds, humans would be considered altricial. Humans are rather a special case, for a baby makes great demands on the parent both before and after birth. 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