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Australia's Antechinus: The world's most highly sexed animal

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Australia's Antechinus: The world's most highly sexed animal

Postby admin_pornrev » Wed Sep 11, 2013 10:49 am

The most highly sexed animal in the world: The Antechinus, Australia's Party Animal

Antechinus - Copy (2).jpg
Antechinus - Copy (2).jpg (43.32 KiB) Viewed 5779 times


Note from Dick: These little creatures are considered by many experts to be the most highly sexed animals on earth, the males literally fuck themselves to death every spring. They have been known to breed for 6 hours at a time and even as long as 12 hours straight!
While living in the rainforests of New South Wales Australia I had the pleasure of meeting these amazing little creatures. My Humpy (bush shack) had a very effective roof. I made a big "spider web" under the trees with heavy gauge wire, attached to the trees with the wire inside garden hose, so the wire would not cut into the trees supporting it. Then I covered the wire spider web with bird wire and big plastic tarpaulins. This "roof" was as big as a house AND stronger, it could withstand HUGE branches falling from the massive rainforest trees above, branches that would smash a normal house to pieces.... Anyway the Antechinus decided my roof was an ideal place to live (as well as snakes, lizards and heap of other creatures)... Every Spring the Antechinus would go CRAZY in my roof and keep me awake all night for a couple of weeks and then I'd find many of them lying around dead. I knew immediately they were having wild crazy sex party's haha. So I had to find out more ;)


Antechinus
From Wikipedia, the free encyclopedia

FROM: http://en.wikipedia.org/wiki/Antechinus

Reproduction

All Antechinus species except for A. swainsonii are semelparous at least as males – and usually as females too –, meaning that an individual will usually only live long enough to breed once in its lifetime. Breeding occurs in late winter, early spring (usually August–September) at a time when there is little food available in the environment. The male can spend up to 12 hours mating to ensure breeding success. To accomplish this the males strip their body of vital proteins and also suppress the immune system so as to free up additional metabolic energy. In this way an individual male trades away long-term survival in return for short-term breeding success, and following the breeding season there is a complete die-off of physiologically exhausted males.[1] Breeding is intensely competitive. Males produce large amounts of testosterone and mate-guarding occurs in the form of protracted copulation (up to twelve hours in some species).

The females can store sperm for up to three days in specialized sperm-storage crypts in the ovary and do not ovulate until the end of the breeding season. Many litters have multiple paternity (i.e., several fathers contribute to a single litter). Females can live for 2–3 years. However, this is unusual, and most females die following the weaning of their first litter. Litters size depends on the number of teats in the pouch. There are as few as 4 teats, usually 8, and in some populations up to 10 can occur. It is currently unknown why teat number varies. However, it is likely that in food-poor environments selection has tended towards fewer teats so that there is a greater parental investment per offspring.
Antechinus babies can weigh as little as 4 grams and are some of the smallest Australian native animal babies.


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Antechinus

Antechinus flavipes, from Brehms Tierleben

Scientific classification

Kingdom: Animalia

Phylum: Chordata

Class: Mammalia

Order: Dasyuromorphia

Family: Dasyuridae

Subfamily: Dasyurinae

Tribe: Phascogalini

Genus: Antechinus
Macleay, 1841

Type species

Antechinus stuartii
Macleay, 1841

Species

• A. adustus
• A. agilis
• A. bellus
• A. flavipes
• A. godmani
• A. leo
• A. minimus
• A. stuartii
• A. subtropicus
• A. swainsonii

Antechinus ('ant+echinus' - resembling a hedgehog (from its bristly fur)) is a genus of dasyurid marsupial that is indigenous to Australia (including Tasmania and some outlying islands) and New Guinea. The majority of Antechinus species occur in Australia and only two species (currently with a putative third) have been described in New Guinea. Members of this species have been called broad-footed marsupial mice, pouched mice, or antechinus shrews. However, these common names are to be considered either regional or archaic and the modern common name for animals of this genus is 'antechinus'.
Antechinuses are small, carnivorous, shrew-like animals that primarily prey on invertebrates such as spiders, beetles (including larvae), and weevils. Some are strictly terrestrial and hunt only at ground level, while others are highly scansorial (climbing) in nature. Most species nest communally in tree-hollows.
Their habitat is primarily: temperate rainforest, dry and wet eucalypt forest, healthy woodlands (A. agilis / A. stuartii); temperate rainforest (A. swainsonii); swamps, wet heaths (A. minimus); disturbed or open woodlands, dry/wet, tropical/subtropical/temperate eucalypt forest/rainforest, healthy woodlands (A. flavipes [highly widespread]); tropical rainforest (A. godmani, A. leo); tropical/subtropical vine-forests (A. subtropicus, A. adustus); monsoonal open forest (A. bellus).
Antechinuses have short hair and vary from grey-cinnamon-brown-black in colour depending on the species. They have prominent whiskers, large ears and a pronounced, pointed snout, giving them an overall shrew-like appearance. Species vary from 80–120 mm, nose-to-tail (80 mm = female A. agilis, 120 mm = male A. swainsonii) and weight 16–170 g (16 g = female A. agilis, 170 g = male A. swainsonii) when fully grown. Sexual dimorphism occurs in most species for both weight and skeletal measurements, with males being typically larger and heavier. A. agilis is the smallest known species, and A. swainsonii the largest. Species in Papua New Guinea are not well documented and unknown Papuan species and subspecies likely await discovery.



Brown Antechinus, here a minor indoor pest.
Species
• Antechinus adustus (Thomas, 1923) (Tropical Antechinus)
• Antechinus agilis (Dickman, et al. 1998) (Agile Antechinus)
• Antechinus bellus (Thomas, 1904) (Fawn Antechinus)
• Antechinus flavipes (Waterhouse, 1837) (Yellow-footed Antechinus)
• Antechinus godmani (Thomas, 1923) (Atherton Antechinus)
• Antechinus leo (van Dyck, 1980) (Cinnamon Antechinus)
• Antechinus minimus (É. Geoffroy Saint-Hilaire, 1803) (Swamp Antechinus)
• Antechinus stuartii (Macleay, 1841) (Brown Antechinus)
• Antechinus subtropicus (van Dyck and Crowther, 2000) (Subtropical Antechinus)
• Antechinus swainsonii (Waterhouse, 1840) (Dusky Antechinus)
References
1. ^ http://www2.canada.com/calgaryherald/ne ... ceb16b&p=2
• Groves, C. (2005). Wilson, D. E.; Reeder, D. M. eds. Mammal Species of the World (3rd ed.). Baltimore: Johns Hopkins University Press. pp. 28-30. OCLC 62265494. ISBN 0-801-88221-4.
• "Antechinus". Integrated Taxonomic Information System. Retrieved 2 February 2006.
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Extant Dasyuromorphia species


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WILDLIFE MOUNTAIN

FROM: http://www.wildlifemountain.com/antechinus.htm


Brown Antechinus in care

ANTECHINUS
When a mouse is not a mouse.

Early November 2004 we had some interesting little creatures come in to care. The mother was found dead under a rat bait station with four tiny babies, alive and clinging to her fur.

The caller was most distraught, as he had intended ridding his premises of rats and mice, not suspecting that native wildlife may also fall prey to the baits. He was uncertain as to what these little critters were, but knew that they were definitely not mice or rats and turned out to be the native Dusky Antechinus.

These cute little creatures look similar to the feral mouse, but there are differences. For one, the Antechinus lacks the pungent odours associated with mice, they also lack the enlarged incisor teeth (front) like the mouse has, and instead they have teeth similar to canines. They do not gnaw on cables etc like mice, and they are unlikely to eat stored food, being carnivores they prefer insects and small lizards.

We have 3 species of Antechinus in Northern NSW; being the Brown Antechinus, Dusky Antechinus and Yellow- footed Antechinus. All 3 species have a similar breeding pattern, mating in September, when the males become very aggressive searching for females. They mate for up to 6 hours at a time over a period of 2 weeks with a number of females, after which not a single male is left alive, death results from stress due to aggressive behavior and the excessive mating ritual.

A quiz question often asked: “What is the most sexed animal in the world?” The answer is: the Antechinus.

About a month after mating the female gives birth to approx 7-10 tiny babies. They are carried in a kind of open pouch clinging to the nipples of the mother, as she goes about her business, being dragged over the ground for 5-8 weeks depending on species. One wonders how they manage to survive this early part of their life. After 6-8 weeks they become too large to travel with the mother, they are now left in the nest made of dry plant material, hidden in a hollow log or similar protected place. They are weaned at 3 months of age, and now travel with mum through the summer months. As winter approaches, they all become solitary and go their separate ways, sexually maturing at 11 months of age.
The Dusky Antechinus is found only on the east cost of Australia and Tasmania, living in mainly mountainous areas with dense understorey of ferns and scrubs. Here it uses its long claws and powerful limbs to dig for invertebrates; it also eats fruits such as blackberry on occasion. At this stage the Dusky Antechinus is not considered threatened, however, some local populations throughout the region have been reduced due to burning, which destroys complex under storey habitat.
Of the 4 juvenile Antechinus we had come in to care, 3 died due to the rat poison, 1 survived and was successfully released, I am guessing that the survivor did not have a drink from mum after she ate the bait.
Please be careful when dealing with mice in your home, you could be accidentally killing protected native Wildlife, who help maintain the fragile balance of biodiversity in our local forests.
Reference: The Australian Museum Complete book of Australian Mammals
The Antechinus like all native birds, mammals, amphibians and reptiles are all proteced under the Wildlife Act 1975, they may not be captured or harmed in any way without an authority issued under the Wildlife Act.

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©Wildlife Mountain 2000 - 2012

We would also like to acknowledge the amazing support and help we have had from the Lismore Vet Clinic who have been an invaluable support to both us and the native wildlife of this region.

All native birds, mammals, amphibians and reptiles are proteced under the Wildlife Act 1975, they may not be captured or harmed in any way without an authority issued under the Wildlife Act.
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