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Voalavo antsahabensis ( Catalão; Valenciano )

fornecido por wikipedia CA

Voalavo antsahabensis és una espècie de rosegador de la família dels nesòmids. És endèmic del centre-est de Madagascar, on viu a altituds d'entre 1.250 i 1.425 msnm. El seu hàbitat natural són els boscos tropicals montans. Està amenaçat per la destrucció del seu medi a causa de l'agricultura d'artigatge.[1] El seu nom específic, antsahabensis, significa 'd'Antsahabe' i es refereix a un municipi de Madagascar.[2]

Referències

  1. Goodman, S. Voalavo antsahabensis. UICN 2008. Llista Vermella d'espècies amenaçades de la UICN, edició 2008, consultada el 18 març 2016.
  2. Entrada «Voalavo» d'Animalia (en anglès).
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Voalavo antsahabensis: Brief Summary ( Catalão; Valenciano )

fornecido por wikipedia CA

Voalavo antsahabensis és una espècie de rosegador de la família dels nesòmids. És endèmic del centre-est de Madagascar, on viu a altituds d'entre 1.250 i 1.425 msnm. El seu hàbitat natural són els boscos tropicals montans. Està amenaçat per la destrucció del seu medi a causa de l'agricultura d'artigatge. El seu nom específic, antsahabensis, significa 'd'Antsahabe' i es refereix a un municipi de Madagascar.

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Östlicher Voalavo ( Alemão )

fornecido por wikipedia DE

Der Östliche Voalavo (Voalavo antsahabensis) ist eine Art der Madagaskar-Ratten innerhalb der nur durch zwei Arten bekannten Voalavos. Die Art lebt endemisch im zentral-östlichen Teil von Madagaskar, wo sie bisher nur von einem einzigen Fundort bekannt ist.

Merkmale

Der Östliche Voalavo erreicht eine Kopf-Rumpf-Länge von 8,5 bis 10 Zentimetern bei einer Schwanzlänge von 10 bis 12,3 Zentimetern, das Gewicht beträgt 19 bis 26 Gramm. Damit handelt es sich um eine sehr kleine Art der Nagetiere. Das Fell der Tiere ist dicht und weich mit einer seidigen Textur. Die Rückenfärbung ist mittelgrau, die Flanken und der Nacken sind etwas bräunlicher und der Bauch ist weiß bis hellgrau. Der Schwanz ist weitgehend nackt und zweifarbig, die Oberseite ist grau und die Unterseite weiß. Die Unterschenkel sind bräunlich grau, die Füße und Zehen vollständig weiß.[1]

Die Weibchen besitzen drei Paar Zitzen.[1]

Verbreitung

 src=
Fundorte der beiden bisher bekannten Voalavos. Grün: Östlicher Voalavo. Rot: Nördlicher Voalavo.

Beide Voalavo-Arten kommen als Endemiten nur auf Madagaskar vor und sind jeweils nur von einzelnen Fundorten bekannt. Die Nachweise für den Östlichen Voalavo stammen aus der Provinz Antananarivo nahe der Stadt Anjozorobe im zentral-östlichen Teil der Insel.[1]

Lebensweise

Über die Lebensweise der Voalavos liegen nur sehr wenige Informationen vor. Der Östliche Voalavo kommt in feuchten Bergregenwaldgebieten der Höhenlagen zwischen 1250 und 1450 Metern vor.[1] Die Tiere ernähren sich wahrscheinlich von Samen und anderen Pflanzenteilen. Sie sind nachtaktiv und leben möglicherweise in Bodennestern oder im Laub der Bäume. Sie sind dabei in der Lage, an Lianen zu klettern, die dünner als ein Bleistift sind.[1]

Die Tiere besitzen Drüsen im oberen Brustbereich, die vor allem bei den paarungsfähigen Männchen einen spezifischen Duft produzieren, um Weibchen anzulocken. Die Weibchen gebären wahrscheinlich zum Ende der Regenzeit im August bis September einen Wurf mit durchschnittlich zwei Jungtieren.[1]

Systematik

Der Östliche Voalavo wird als eigenständige Art innerhalb der Gattung der Voalavos (Voalavo) eingeordnet,[2] die neben ihm nur noch den 1998 beschriebenen Nördlichen Voalavo enthält.[3][1] Die wissenschaftliche Erstbeschreibung der Art stammt von den Zoologen Steven M. Goodman, Daniel Rakotondravony, Hary N. Randriamanantsoa und Marlène Rakotomalala-Razanahoera aus dem Jahr 2005, die sie anhand von Individuen aus dem Umland von Anjozorobe beschrieben.[1][3]

Innerhalb der Art werden neben der Nominatform keine Unterarten unterschieden.[1]

Status, Bedrohung und Schutz

Der Östliche Voalavo wird von der International Union for Conservation of Nature and Natural Resources (IUCN) als bedroht („endangered“) eingeordnet.[4] Die Hauptbedrohung für diese Art ist der Verlust und die Verschlechterung der Lebensräume als Folge von Brandrodungen durch landwirtschaftliche Aktivitäten. Eine potentielle Bedrohung ist zudem eine Krankheit, die durch eingeschleppte Flöhe von eingeführten Nagetieren auf madegassische Nagetiere übertragen wurde.[4]

Belege

  1. a b c d e f g h i Northern Naked-tail Forest Mouse. In: S.M. Goodman, A. Monadjem: Family Nesomyidae (Pouched Rats, Climbing Mice and Fat Mice) In: Don E. Wilson, T.E. Lacher, Jr., Russell A. Mittermeier (Herausgeber): Handbook of the Mammals of the World: Rodents 2. (HMW, Band 7) Lynx Edicions, Barcelona 2017, S. 188–189. ISBN 978-84-16728-04-6.
  2. Michael D. Carleton, Steven M. Goodman: New taxa of nesomyine rodents (Muroidea: Muridae) from Madagascar's northern highlands, with taxonomic comments on previously described forms. Fieldiana Zoology 90, 1998; S. 163–200, Art- und Gattungsbeschreibung: S. 182–183. (Digitalisat, Beschreibung).
  3. a b Steven M. Goodman, Daniel Rakotondravony, Hary N. Randriamanantsoa, Marlène Rakotomalala-Razanahoera: A new species of rodent from the montane forest of central eastern Madagascar (Muridae: Nesomyinae: Voalavo). Proceedings of the Biological Society of Washington 118 (4), 2005; S. 863–873. doi:10.2988/0006-324X(2005)118[863:ANSORF]2.0.CO;2.
  4. a b Voalavo antsahabensis in der Roten Liste gefährdeter Arten der IUCN 2016. Eingestellt von: R. Kennerley, 2016. Abgerufen am 18. Mai 2020.

Literatur

  • Northern Naked-tail Forest Mouse. In: S.M. Goodman, A. Monadjem: Family Nesomyidae (Pouched Rats, Climbing Mice and Fat Mice) In: Don E. Wilson, T.E. Lacher, Jr., Russell A. Mittermeier (Herausgeber): Handbook of the Mammals of the World: Rodents 2. (HMW, Band 7) Lynx Edicions, Barcelona 2017, S. 188–189. ISBN 978-84-16728-04-6.
  • Steven M. Goodman, Daniel Rakotondravony, Hary N. Randriamanantsoa, Marlène Rakotomalala-Razanahoera: A new species of rodent from the montane forest of central eastern Madagascar (Muridae: Nesomyinae: Voalavo). Proceedings of the Biological Society of Washington 118 (4), 2005; S. 863–873. doi:10.2988/0006-324X(2005)118[863:ANSORF]2.0.CO;2.

Weblinks

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Östlicher Voalavo: Brief Summary ( Alemão )

fornecido por wikipedia DE

Der Östliche Voalavo (Voalavo antsahabensis) ist eine Art der Madagaskar-Ratten innerhalb der nur durch zwei Arten bekannten Voalavos. Die Art lebt endemisch im zentral-östlichen Teil von Madagaskar, wo sie bisher nur von einem einzigen Fundort bekannt ist.

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Eastern voalavo ( Inglês )

fornecido por wikipedia EN

The eastern voalavo (Voalavo antsahabensis) is a rodent in the family Nesomyidae which occurs in the Anjozorobe forest of eastern Madagascar. Although surveys before 2002 failed to record the species, it is common in some places. However, it is threatened by habitat loss because of slash-and-burn agriculture. The species was formally described in 2005 and is most closely related to the only other species of Voalavo, the northern voalavo from northern Madagascar.

The two species of Voalavo are only subtly different in morphology. With a body mass of 20.7 to 22.6 g (0.73 to 0.80 oz), the eastern voalavo is a small rodent. It has a longer tail than the northern voalavo, as well as a longer rostrum (front part of the skull) and diastema (gap between the incisors and molars), but shorter molar rows. The two species also differ in details of the configuration of the palate.

Taxonomy

It was first recorded in 2002,[1] when three individuals were captured in Madagascar's Anjozorobe forest. In 2005, the species was formally described by Steven Goodman and colleagues as Voalavo antsahabensis, the second species in the genus Voalavo. The only previously known species, the northern voalavo, occurs further to the north, in the Northern Highlands.[2] The sequences of the cytochrome b gene differ by about 10% in these two species.[3] The specific name, antsahabensis, derives from the name of the village of Antsahabe, which is near the place where the holotype was found.[4] The common name "Eastern Voalavo" has been used for this species.[1]

Description

Species of Voalavo are small rodents with a delicate skull and without a tuft at the tip of the tail (as present in the closely related genus Eliurus).[5] The eastern voalavo is similar to the northern voalavo and differs only in subtle characters.[4] The tail is shorter in the eastern voalavo, but the head and body is slightly longer, as is the ear. However, the latter two apparent contrasts may be the result of differences in measurement technique.[6] In both species, the final 25 to 30 mm (0.98 to 1.18 in) of the tail are covered with white hairs.[7] In three specimens of eastern voalavo, head and body length ranges from 88 to 91 mm (3.5 to 3.6 in), tail length is 106 to 114 mm (4.2 to 4.5 in), hindfoot length 19 to 20 mm (0.75 to 0.79 in), ear length 15 to 16 mm (0.59 to 0.63 in), and body mass 20.7 to 22.6 g (0.73 to 0.80 oz).[8]

In the skull, it has a significantly longer rostrum (the front part of the skull) and diastema (the gap between the incisors and the molars).[7] Furthermore, it has shorter molar rows in both the upper and lower jaws.[8] The back end of the incisive foramina (openings in the front part of the palate), which is located in front of the first molars, is rounded in eastern voalavo, but angular in northern voalavo.[9] The sutures of the maxillary and palatine bones (the line where the two bones, part of the skull, join) are straight and parallel to each other, the toothrows, and the midline of the skull in eastern voalavo. Northern voalavo, in contrast, are more curved. Statistical analysis of measurements of the skull and teeth clearly separates the two species of Voalavo.[4]

Distribution and ecology

It is only known from the forests at Anjozorobe, on the eastern margin of Madagascar's Central Highlands. Among the specimens found in 2002, two were captured at 1,425 m (4,675 ft) altitude on a Uapaca densifolia branch, about 1.5 m (4.9 ft) over the ground, in moist montane forest, and a third was caught on the ground at 1,275 m (4,183 ft) altitude.[10] This last specimen, a male, had its testicles located in the scrotum, and therefore was reproductively mature, even though its skull bones were not completely fused, indicating it was not yet osteologically mature.[4] Before it was collected in 2002, the species was not recorded in earlier biological surveys of Anjozorobe, taking place in 1977–1986 and 1996; whether this is because the animal is difficult to collect, because its abundance varies from year to year, or because its distribution is patchy is unknown. Goodman and colleagues argued on the basis of this example that rapid surveys may not necessarily yield complete inventories of the fauna of an area.[3] Later surveys in 2005 and 2006 did find it at several other sites in the region, at some of which it was abundant.[1] Anjozorobe is about 450 km (280 mi) from the nearest occurrence of northern voalavo, and most of the intervening area contains montane forest. However, this forest zone is bisected by the low-lying Mandritsara Window, which may serve as a barrier between the two species of Voalavo.[11]

Conservation status

It is listed as "Endangered" on the IUCN Red List because of its small, vulnerable range; the Anjozorobe forest is threatened by the practice of slash-and-burn agriculture (tavy). However, its habitat has been designated as a protected area, the Couloir Forestier d'Anjozorobe-Angavo.[1]

References

  1. ^ a b c d e Kennerley, R. (2019). "Voalavo antsahabensis". IUCN Red List of Threatened Species. 2019: e.T165925A22236108. doi:10.2305/IUCN.UK.2019-1.RLTS.T165925A22236108.en. Retrieved 19 November 2021.
  2. ^ Goodman et al., 2005, p. 863
  3. ^ a b Goodman et al., 2005, p. 871
  4. ^ a b c d Goodman et al., 2005, p. 870
  5. ^ Goodman et al., 2005, pp. 865–866
  6. ^ Goodman et al., 2005, pp. 868–869
  7. ^ a b Goodman et al., 2005, p. 868
  8. ^ a b Goodman et al., 2005, table 1
  9. ^ Goodman et al., 2005, p. 869
  10. ^ Goodman et al., 2005, p. 866
  11. ^ Goodman et al., 2005, p. 872
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Eastern voalavo: Brief Summary ( Inglês )

fornecido por wikipedia EN

The eastern voalavo (Voalavo antsahabensis) is a rodent in the family Nesomyidae which occurs in the Anjozorobe forest of eastern Madagascar. Although surveys before 2002 failed to record the species, it is common in some places. However, it is threatened by habitat loss because of slash-and-burn agriculture. The species was formally described in 2005 and is most closely related to the only other species of Voalavo, the northern voalavo from northern Madagascar.

The two species of Voalavo are only subtly different in morphology. With a body mass of 20.7 to 22.6 g (0.73 to 0.80 oz), the eastern voalavo is a small rodent. It has a longer tail than the northern voalavo, as well as a longer rostrum (front part of the skull) and diastema (gap between the incisors and molars), but shorter molar rows. The two species also differ in details of the configuration of the palate.

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Wikipedia authors and editors
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wikipedia EN

Voalavo antsahabensis ( Espanhol; Castelhano )

fornecido por wikipedia ES

Voalavo antsahabensis es una especie de roedor de la familia Nesomyidae. Fue descubierto después de años de estudios en el bosque Anjozorobe.

Distribución geográfica

Se encuentra sólo en las selvas de las montañas de Anjozorobe en Madagascar .

Referencias

  1. Goodman, S. (2009). «Voalavo antsahabensis». Lista Roja de especies amenazadas de la UICN 2012.2 (en inglés). ISSN 2307-8235. Consultado el 23 de febrero de 2013.
  • Musser, G. G. and M. D. Carleton. 2005. Superfamily Muroidea. Pp. 894-1531 in Mammal Species of the World. A Taxonomic and Geographic Reference. D. E. Wilson and D. M. Reeder eds. Johns Hopkins University Press, Baltimore.

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Voalavo antsahabensis: Brief Summary ( Espanhol; Castelhano )

fornecido por wikipedia ES

Voalavo antsahabensis es una especie de roedor de la familia Nesomyidae. Fue descubierto después de años de estudios en el bosque Anjozorobe.

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Autores y editores de Wikipedia
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Voalavo antsahabensis ( Basco )

fornecido por wikipedia EU

Voalavo antsahabensis Voalavo generoko animalia da. Karraskarien barruko Nesomyinae azpifamilia eta Nesomyidae familian sailkatuta dago.

Madagaskarreko Anjozorobe basoan baino ez da bizi.

Ikus, gainera

(RLQ=window.RLQ||[]).push(function(){mw.log.warn("Gadget "ErrefAurrebista" was not loaded. Please migrate it to use ResourceLoader. See u003Chttps://eu.wikipedia.org/wiki/Berezi:Gadgetaku003E.");});
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Voalavo antsahabensis: Brief Summary ( Basco )

fornecido por wikipedia EU

Voalavo antsahabensis Voalavo generoko animalia da. Karraskarien barruko Nesomyinae azpifamilia eta Nesomyidae familian sailkatuta dago.

Madagaskarreko Anjozorobe basoan baino ez da bizi.

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Voalavo antsahabensis ( Francês )

fornecido por wikipedia FR

Voalavo antsahabensis est une espèce de rongeurs endémique de Madagascar.

Répartition et habitat

 src=
Le point vert montre la répartition de Voalavo antsahabensis et les points rouges, la répartition de Voalavo gymnocaudus

Comme toutes les espèces de la sous-famille Nesomyinae, cette espèce est endémique de Madagascar. Elle est présente dans le centre-est de l'île, entre 1 250 et 1 425 m d'altitude. Elle n'a été observée qu'en forêt tropicale humide de montagne[2].

Publication originale

  • (en) Steven M. Goodman, Daniel Rakotondravony, Hary N. Randriamanantsoa et Marlène Rakotomalala-Razanahoera, « A new species of rodent from the montane forest of central eastern Madagascar (Muridae: Nesomyinae: Voalavo) », Proceedings of the Biological Society of Washington, Washington, Biological Society of Washington (d), vol. 118, no 4,‎ décembre 2005, p. 863-873 (ISSN et , OCLC , DOI )

Notes et références

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Voalavo antsahabensis: Brief Summary ( Francês )

fornecido por wikipedia FR

Voalavo antsahabensis est une espèce de rongeurs endémique de Madagascar.

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Voalavo antsahabensis ( Neerlandês; Flamengo )

fornecido por wikipedia NL

Voalavo antsahabensis is een knaagdier uit het geslacht Voalavo dat voorkomt in de bergregenwouden van het Anjozorobe-gebied in het Centrale Hoogland van Madagaskar. Deze soort verschilt in een groot aantal kenmerken van de andere soort van het geslacht, Voalavo gymnocaudus uit de bergen Anjanaraharibe-Sud en Marojejy in het noorden van Madagaskar. V. antsahabensis werd pas ontdekt na jarenlange studies in het Anjozorobe-woud.

Literatuur

  • Goodman, S.M., Rakotondravony, D., Randriamanantsoa, H.N. & Rakotomalala-Razanahoeraa, M. 2005. A new species of rodent from the montane forest of central eastern Madagascar (Muridae: Nesomyinae: Voalavo). Proceedings of the Biological Society of Washington 118(4):863–873.
Bronnen, noten en/of referenties
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Voalavo antsahabensis: Brief Summary ( Neerlandês; Flamengo )

fornecido por wikipedia NL

Voalavo antsahabensis is een knaagdier uit het geslacht Voalavo dat voorkomt in de bergregenwouden van het Anjozorobe-gebied in het Centrale Hoogland van Madagaskar. Deze soort verschilt in een groot aantal kenmerken van de andere soort van het geslacht, Voalavo gymnocaudus uit de bergen Anjanaraharibe-Sud en Marojejy in het noorden van Madagaskar. V. antsahabensis werd pas ontdekt na jarenlange studies in het Anjozorobe-woud.

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Voalavo antsahabensis ( Português )

fornecido por wikipedia PT

Voalavo antsahabensis é uma espécie de roedor da família Nesomyidae.

É endêmica de Madagascar.

Referências

  • GOODMAN, S. M., RAKOTONDRAVONY, D., RANDRIAMANANTSOA, H. N., RAKOTOMALALA-RAZANAHOERAA, M. (2005). A new species of rodent from the montane forest of central eastern Madagascar (Muridae: Nesomyinae: Voalavo). Proceedings of the Biological Society of Washington 118 (4): 863–873.
 title=
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Voalavo antsahabensis: Brief Summary ( Português )

fornecido por wikipedia PT

Voalavo antsahabensis é uma espécie de roedor da família Nesomyidae.

É endêmica de Madagascar.

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Voalavo antsahabensis ( Ucraniano )

fornecido por wikipedia UK

Voalavo antsahabensis — вид гризунів родини Незомієві (Nesomyidae).

Поширення

Відомий тільки з лісу уздовж східного краю Центрального нагір'я, в центрі східного Мадагаскару, між висотами 1250 і 1425 м. Вид відокремлений від V. gymnocaudus близько 450 км. Цей вид записаний тільки в гірському тропічному лісі.

Загрози та охорона

Основною загрозою для цього виду є втрата середовища проживання і деградація в результаті підсічно-вогневого сільськогосподарської діяльності. Живе на охоронній території Coulior Forestier d'Anjozorobe-Angavo.

Посилання

  • Goodman, S. 2009. Voalavo antsahabensis. The IUCN
  • Goodman, S.M., Rakotondravony, D., Randriamanantsoa, H.N. & Rakotomalala-Razanahoera, M. 2005. A new species of rodent from the montane forest of central eastern Madagascar (Muridae: Nesomyinae: Voalavo). Proceedings of the Biological Society of Washington 118: 863-873.


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Voalavo antsahabensis: Brief Summary ( Ucraniano )

fornecido por wikipedia UK

Voalavo antsahabensis — вид гризунів родини Незомієві (Nesomyidae).

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동부보알라보 ( Coreano )

fornecido por wikipedia 한국어 위키백과

동부보알라보(Voalavo antsahabensis)는 붉은숲쥐과에 속하는 설치류의 일종이다. 마다가스카르 섬 동부의 앙조조로베 숲에서 발견된다.[2]

각주

  1. Goodman, S. 2009. Voalavo antsahabensis. In IUCN. IUCN Red List of Threatened Species. Version 2010.2. <www.iucnredlist.org>. Downloaded on January 8, 2011.
  2. Goodman, S.M., Rakotondravony, D., Randriamanantsoa, H.N. and Rakotomalala-Razanahoeraa, M. 2005. A new species of rodent from the montane forest of central eastern Madagascar (Muridae: Nesomyinae: Voalavo) (subscription required). Proceedings of the Biological Society of Washington 118(4):863–873.
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