Galagidae: Diferenzas entre revisións

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Liña 27:
 
== Características ==
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Galagos have large eyes that give them good night vision, strong hind limbs, acute [[Hearing (sense)|hearing]], and long tails that help them balance. Their ears are bat-like and allow them to track insects in the dark. They catch insects on the ground or snatch them out of the air. They are fast, agile creatures. As they bound through the thick bushes, they fold their delicate ears back to protect them. They also fold them during rest.<ref name="African Wildlife Foundation"/> They have nails on most of their digits, except for the second toe of the hind foot, which bears a [[grooming claw]]. Their diet is a mixture of insects and other small animals, fruit, and tree gums.<ref name=EoM>{{cite book |editor=Macdonald, D.|author= Charles-Dominique, Pierre|year=1984 |title=The Encyclopedia of Mammals|publisher=Facts on File|location=New York|pages= 332–337|isbn= 0-87196-871-1}}</ref> They have pectinate (comb-like) [[incisors]] called [[toothcomb]]s, and the [[dentition|dental formula]]: {{DentalFormula|upper=2.1.3.3|lower=2.1.3.3}}
 
Os Galagidae teñen grandes ollos que lles proporcionan unha boa visión nocturna, fortes extremidades posteriores, unha audición aguda e longos rabos que lles axudan a equilibrarse. Os seus oídos son parecidos aos dos morcegos e permítenlles rastrear insectos na escuridade. Capturan insectos no chan ou apáñanos polo aire. Son criaturas rápidas e áxiles. Como están ligados a unha vida en mestos arbustos, dobran as súas delicadas orellas para así protexelas. Tamén as dobran cando descansan.<ref name="African Wildlife Foundation"/> Teñen uñas na maioría dos dedos, agás na segundam deda dos pés posteriores, que ten unha [[garra de acicalamento]]. As súas dietas son unha mestura de insectos e outros pequenos animais, froitos e resinas das árbores.<ref name=EoM>{{cite book |editor=Macdonald, D.|author= Charles-Dominique, Pierre|year=1984 |title=The Encyclopedia of Mammals|publisher=Facts on File|location=New York|pages= 332–337|isbn= 0-87196-871-1}}</ref> Teñen [[incisivo]]s pectinados (con forma de peite) e a súa [[fórmula dental]] é: {{FórmulaDental|superior=2.1.3.3|inferior=2.1.3.3}}
After a [[gestation]] period of 110–133 days, young galagos are born with half-closed eyes and are initially unable to move about independently. After a few (6–8) days, the mother carries the infant in her mouth, and places it on branches while feeding. Females may have singles, twins, or triplets, and may become very aggressive. Each newborn weighs less than half an ounce. For the first three days, the infant is kept in constant contact with the mother. The young are fed by the mother for six weeks and can feed themselves at two months. The young grow rapidly, often causing the mother to walk awkwardly as she transports them.<ref name="African Wildlife Foundation"/>
 
Despois dun período de [[xestación]] de 110 a 133 días, as crías nacen cos ollos medio pechados e son inicialmente incapaxces de moverse independentemente. Pasados de 6 a 8 días, a nai transporta á cría colléndoa coa boca e póusaa en pólas mentres ela se alimenta. As femias poden ter unha cría, xemelgos ou trillizos e poden ser moi agresivas. Cada neonato pesa menos de 14 g. Durante os primeiros tres días, a cría está en constante contacto coa nai. A nai aliméntaa durante seis semanas e pode alimentarse por si mesma aos dous meses. A cría medra rapidamente, xeralmente causando que a nai camiñe torpemente cando a tansporta.<ref name="African Wildlife Foundation"/>
Females maintain a [[territory (animal)|territory]], but share them with their offspring. Males leave their mothers' territories after puberty, but females remain, forming social groups consisting of closely related females and their young. Adult males maintain separate territories, which overlap with those of the female social groups; generally, one adult male mates with all the females in an area. Males that have not established such territories sometimes form small bachelor groups.<ref name=EoM/>
 
As femias manteñen un [[territorio (animal)|territorio]], pero compárteno cos seus fillos. Os machos abandonan os territorios das súas nais despois da puberdade, mais as femias forman grupos sociais que consisten en femias estreitamente relacionadas e as súas crías. Os machos adultos manteñen territorios separados, que se solapan cos dos grupos sociais de femias, e xeralmente un macho adulto aparéase con todas as femias dunha área. Os machos que non foron quen de establecer un territorio propio ás veces forman pequenos grupos de individuos solteiros.<ref name=EoM/>
While keeping them as pets is not advised (like many other nonhuman primates, they are considered likely sources of [[zoonoses|diseases that can cross species barriers]]) it is certainly done. Equally, they are highly likely to attract attention from customs officials on importation into many countries. Reports from veterinary and zoological sources indicate captive lifetimes of 12.0 to 16.5 years, suggesting a natural lifetime over a decade.{{Citation needed|date=April 2009}}
 
Ás veces estes animais téñense como mascotas, aínda que non se recomenda, porque, igual que ocorre con outros primates non humanos, considéranse fonte probable de [[zoonose]]s.
Galagos communicate both by calling to each other, and by marking their paths with urine. By following the scent of urine, they can land on exactly the same branch every time.<ref name="African Wildlife Foundation"/> All species of galago produce species-specific 'loud calls' or 'advertisement calls'. These calls have multiple different functions. One function is long-distance identification and differentiation of individual species, and scientists are now able to recognize all known galago species by their 'loud calls'.<ref>{{Cite journal|url = |title = Vocal Profiles for the Galagos: A Tool for Identification|last = Bearder|first = Simon K.|date = 2013|journal = Journal of Primate Conservation|doi = 10.1896/052.027.0102|pmid = |access-date = |last2 = Butynski|first2 = Thomas M.|volume = 27|pages = 75|last3 = de Yong|first3 = Yvonne A.}}</ref> At the end of the night, group members use a special rallying call and gather to sleep in a nest made of leaves, a group of branches, or a hole in a tree.
 
Os Galagidae comunícanse tanto chamándose uns a outros coma marcando os camiños por onde van con [[urina]]. Seguindo o cheiro da urina, poden chegar exactamente á mesma póla que marcaron.<ref name="African Wildlife Foundation"/> Todas as especies emiten ''chamdas fortes'' ou ''chamadas de anuncio'' específicas de especie. Estas chamadas teñen moitas funcións diferentes. Unha función é a identificación a longa distancia e a diferenciación entre unha especie e outra, e os científicos poden hoxe endía recoñecer todas as especies coñecidas de Galagidae polas súas ''chamadas fortes''.<ref>{{Cite journal|url = |title = Vocal Profiles for the Galagos: A Tool for Identification|last = Bearder|first = Simon K.|date = 2013|journal = Journal of Primate Conservation|doi = 10.1896/052.027.0102|pmid = |access-date = |last2 = Butynski|first2 = Thomas M.|volume = 27|pages = 75|last3 = de Yong|first3 = Yvonne A.}}</ref> Ao final da noite, os membros dun grupo usan unha chamada especial para xuntarse e agruparse para durmir nun niño feito de follas, ou nun grupo de pólas ou nun oco nunha árbore.
 
=== Salto ===
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Galagos have remarkable [[jumping]] abilities. The highest reliably reported jump for a galago is 2.25 m. According to a study published by the Royal Society, given the body mass of each animal and the fact that the leg muscles amount to about 25% of this, galago's jumping muscles should perform six to nine times better than those of a frog.<ref name="jumping">{{cite journal | last = Aerts| first = Peter| title = Vertical jumping in ''Galago senegalensis'': the quest for an obligate mechanical power amplifier| journal = Philos Trans R Soc Lond B Biol Sci.| volume =353 | issue = 1375| pages =1607–1620 | date = 29 October 1998 | doi=10.1098/rstb.1998.0313}}</ref> This is thought to be due to elastic energy storage in tendons of the lower leg, allowing far greater jumps than would otherwise be possible for an animal of their size.<ref name="jumping"/> In mid-flight, they tuck their arms and legs close to the body; they are then brought out at the last second to grab the branch. In a series of leaps, a galago can cover ten yards in mere seconds. The tail, which is longer than the length of the head and body combined, assists the powerful leg muscles in powering the jumps. They may also hop like a kangaroo or simply run/walk on four legs.<ref name="African Wildlife Foundation"/> Such strong, complicated, and coordinated movements are due to the rostral half of the posterior parietal cortex that is linked to the motor, premotor, and visuomotor areas of the frontal cortex.<ref>{{Cite journal|url = |title = Microstimulation reveals specialized subregions for different complex movements in posterior parietal cortex of prosimian galagos|last = Stepniewska|first = Iwona|date = 2005|journal = Proceedings of the National Academy of Sciences of the United States of America|doi = 10.1073/pnas.0501048102|pmid = 15772167|access-date = |last2 = Fang|first2 = Pei-Chun|volume = 102|last3 = Kaas|pages = 4878–4883|first3 = Jon H.|pmc=555725}}</ref>
 
Liña 89 ⟶ 90:
A low-coverage genomic sequence of the [[northern greater galago]], ''O. garnettii'', is in progress. As it is a 'primitive' primate, the sequence will be particularly useful in bridging the sequences of higher primates ([[macaque]], [[chimpanzee]], [[human]]) to close nonprimates, such as [[rodents]]. The two-time planned coverage will not be sufficient to create a full genome assembly, but will provide comparative data across most of the human assembly.{{Citation needed|date=December 2016}}
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== Notas ==
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