Madagascar’s dwarf lemurs shed light on tropical hibernation

Until recently, the only primate understood to hibernate as a survival strategy was a creature called the western fat-tailed dwarf lemur, a tropical tree-dweller from the island of Madagascar.

But it turns out this critter isn’t alone. In a new study in the journal Scientific Reports, researchers report that two other little-known lemurs – Crossley’s dwarf lemur and Sibree’s dwarf lemur – burrow into the soft, spongy rainforest floor in the eastern part of Madagascar, curl up and spend the next few months snoozing underground.

By comparing the hibernation habits of these eastern lemurs and their western counterparts, researchers hope to better understand what sends hibernating animals into standby mode, and whether lemurs – our closest genetic relatives known to hibernate – do it differently from other hibernating animals.

“Exactly what triggers hibernation is still an open question,” said lead author Marina Blanco, from the Duke University Lemur Center. Unlike animals such as bears and squirrels, which hibernate to survive the cold, western dwarf lemurs hibernate to survive during western Madagascar’s long dry season – a time when temperatures top 85 degrees, trees drop their leaves and food and water are in short supply.

But the hibernation habits of Madagascar’s eastern dwarf lemurs, whose homes include high-altitude forests where winter temperatures occasionally dip below freezing, were poorly known. “It’s a very different environment,” Blanco noted.

To find out more, the research team trapped and fitted the animals with temperature-sensitive radio collars before the start of the hibernation season, allowing them to find the lemurs’ underground burrows and monitor their body temperature once hibernation began.

Hibernating animals tend to breathe more slowly, drop their heart rate and lower their body temperature, becoming inactive for days at a time. Dwarf lemurs are no exception. “To the casual observer, it looks for all the world as if the animals are dead. Their bodies are cold, they are utterly still and they take a breath only once every several minutes or so,” said co-researcher Anne Yoder, director of the Duke Lemur Center.

Western dwarf lemurs hibernate in drafty tree holes, where their body temperature fluctuates by as much as 20 degrees with the outside air. But the researchers found that eastern dwarf lemurs keep their body temperatures more constant in cozy underground burrows.

The research suggests that lemur hibernation – and therefore primate hibernation – may not be so different after all. “Maybe these lemurs, though they live in the tropics, look more like temperate hibernators than we thought,” Blanco said.

Related:
Discuss this article in our forum
Primates on The Pill find it hard to pull
Tiny new reptile species discovered
Grizzlies moving in on polar bears’ turf

Source: Duke University

,

Comments are closed.

5inx3.25in Lemur Gray Grey Bumper Sticker Stickers Vinyl Car Window Decal Decals picture

5inx3.25in Lemur Gray Grey Bumper Sticker Stickers Vinyl Car Window Decal Decals

$6.99



Malayan Flying Lemur Southeast Asia Wild  Animals  Vintage Ad Trade Card picture

Malayan Flying Lemur Southeast Asia Wild Animals Vintage Ad Trade Card

$4.68



Lemur 2023 Wall Calendar Animals Large 18 Month Calendar Monthly 18x12 inch picture

Lemur 2023 Wall Calendar Animals Large 18 Month Calendar Monthly 18x12 inch

$9.98



Lemur Monkey Ape Primate Vintage Ad Trade Card picture

Lemur Monkey Ape Primate Vintage Ad Trade Card

$4.19



1959 Press Photo Goggles, lesser mouse lemur at Whipsnade Zoo, Bedforshire, Eng picture

1959 Press Photo Goggles, lesser mouse lemur at Whipsnade Zoo, Bedforshire, Eng

$10.00



Eremobates spider. Galéopithèque (Philippine Flying Lemur). Galerita beetle 1833 picture

Eremobates spider. Galéopithèque (Philippine Flying Lemur). Galerita beetle 1833

$22.43



Walt Disney DINOSAUR Movie PLIO Plush Sifika Lemur 27

Walt Disney DINOSAUR Movie PLIO Plush Sifika Lemur 27" Toy NWT Disney Store

$29.99



LEMUR - LEMURS 8X10 GLOSSY PHOTO PICTURE picture

LEMUR - LEMURS 8X10 GLOSSY PHOTO PICTURE

$3.99



Ring Tailed Lemur with Pop-Up Image 1920s Trade Ad Card picture

Ring Tailed Lemur with Pop-Up Image 1920s Trade Ad Card

$7.69



CPA Chasseurs-Alpins Le Mur d'assaut picture

CPA Chasseurs-Alpins Le Mur d'assaut

$9.50



Powered by WordPress. Designed by WooThemes