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bestanimal · 3 months ago

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Round 3 - Mammalia - Peramelemorphia

(Sources - 1, 2, 3, 4)

The marsupial order Peramelemorphia contains the living families Peramelidae (“bandicoots”) and Thylacomyidae (“Greater Bilby”).

Peramelemorphs all tend to have a characteristic shape: a round, arch-backed body with a long, delicately tapering snout, upright ears, relatively long, thin legs, and a thin tail. They range from the size of a rat to the size of a rabbit. They are omnivorous, feeding mainly on soil-dwelling invertebrates, as well as seeds, fruit, and fungi. They possess a well-developed sense of smell and eyes that are adapted for nocturnal habits. They are are generally solitary, with females taking care of their young.

Female peramelemorphs have a pouch that opens to the rear, to protect their young while they dig for insects and their larvae. The gestation period of peramelemorphs is the shortest among mammals, at just 12-14 days. As in other marsupials, peramelemorph joeys are born as tiny, relatively undeveloped neonates and must crawl their way from the vagina to the pouch to latch on to a teat, where they will complete the rest of their development. Peramelemorph growth is fast, with bandicoots setting off on their own and becoming sexually mature at just three months of age. Female bilbies reach sexual maturity at five months of age, and male bilbies become sexually mature at eight months. This allows a given female to produce more than one litter per breeding season and gives peramelemorphs an unusually high reproductive rate compared to other marsupials.

Peramelemorphs originated in the Late Oligocene. Both the oldest modern bandicoot (Peramelid) and the oldest bilby (Thylacomyid) are known from Middle Miocene fossil deposits (around 15 million years old).

Propaganda under the cut:

The name bandicoot is based on the animal’s ratlike appearance. The name comes from an English corruption of an Indian word "pandi-kokku" meaning "pig-rat".

The smallest peramelemorph is the Mouse Bandicoot (Microperoryctes murina), which is 15–17.5 cm (5.9-6.9 in) long.

The Golden Bandicoot (Isoodon auratus) is especially adapted for life in hot, semi-arid environments. It has a low body temperature that is constantly changing, making it heterothermic. This allows the internal body temperature to fluctuate in response to extreme environmental temperatures without inhibiting and denaturing necessary proteins. Additionally, its low metabolic rate correlates to less heat being produced by the body, and a low thermal conductance does not allow the animal to capture and store heat well. A highly efficient panting mechanism allows for a low rate of evaporative water loss when cooling the body, conserving precious water.

The Northern Brown Bandicoot (Isoodon macrourus) is one of relatively few native Australian ground-dwelling mammals that is able to survive in urbanized landscapes, due to their generalized diet and habitat requirements.

The Eastern Barred Bandicoot (Perameles gunnii) (image 1) is the basis for the popular videogame character Crash Bandicoot, and was selected from a number of Tasmanian mammals by creators Andy Gavin and Jason Rubin for its appeal and relative obscurity.

Described in 2014, a fossil species of Miocene bandicoot found at the Riversleigh World Heritage Area was given the genus name Crash. It was given the species names bandicoot. Because paleontologists are just Like That.

Wiped out due to predation from introduced foxes and domestic cats, as well as land-clearing for farming, the Victorian subspecies of the Eastern Barred Bandicoot (Perameles gunnii) was declared Extinct in the Wild. Thanks to 30 years of conservation efforts, breeding the bandicoots in human care and establishing fox and cat-safe sanctuaries, the mainlaind population was changed from Extinct in the Wild to Endangered in September 2021, a first for Australian conservation!

The Giant Bandicoot (Peroryctes broadbenti) (image 3) is more than twice the weight of other bandicoots and adult males of the species can attain weights well in excess of 4 kg (8.8 lb).

Unlike bandicoots, Greater Bilbies (Macrotis lagotis) (image 2 and gif) are excellent burrowers and build extensive tunnel systems with their strong forelimbs and well-developed claws. Burrows spiral down, making it hard for predators to get in. A bilby typically makes several burrows within its home range, up to about a dozen; and moves between them, using them for shelter both from predators and the heat of the day, as they are desert-dwelling animals.

Greater Bilbies are generally solitary, however, there are some cases in which they travel in pairs. Pairs usually consist of two females as the sole caregivers of their offspring.

Greater Bilbies do not need to drink water, as they retain all the moisture they need from their food.

Because rabbits are invasive in Australia, introduced by European settlers, bilbies have been popularised as an Australian alternative to the Easter Bunny. Haigh's Chocolates in Adelaide made 950,000 chocolate “Easter Bilbies” between 1993 and 2020, with proceeds donated to the Foundation for Rabbit-Free Australia, which does environmental work to protect the indigenous biodiversity of Australia.

Today, only the Greater Bilby survives and is vulnerable, but the Lesser Bilby (Macrotis leucura) is a recently extinct relative, having possibly survived into the 1960s. Its extinction was much “quieter” than that of the Thylacine, and was likely due to introductions of invasive predators like the domestic cat and red fox. Other “quiet extinctions” include that of the Desert Bandicoot (Perameles eremiana) which appears to have disappeared between about 1943 and 1960, and the Nullarbor Barred Bandicoot (Perameles papillon) which was last collected in 1928.

Today, many peramelemorph species are still threatened and endangered due to habitat fragmentation and introduced predators, as well as from competition with introduced rabbits. Areas designated to conserve vulnerable populations of bilbies and bandicoots have predator exclusion fences built around them, and must be heavily monitored for break-ins. In Currawinya National Park in Queensland, high-salinity flood waters damaged a predator exclusion fence, allowing feral cats to enter the sanctuary, wiping out all the bilbies in the park.

#animal polls #round 3 #mammalia #to be ENTIRELY CLEAR because I am a conservationist and this is a conservation hot topic and it’s probably going to come up a lot #I LIKE domestic cats and I like red foxes and I like rabbits #they are all 5 star animals to me #the issue here is irresponsible owners who don’t keep their pets contained and Those Pesky Europeans who thought it’d be fun to bring #foxes and rabbits along with them wherever they colonized so they could still recreationally kill them as a little #Memory of Jolly Old England #I do not fault cats and foxes and rabbits for doing what is instinctual to them #but I do think that it is our duty to fix the damages we’ve done to ecosystems by removing these introduced animals #With As Little Cruelty As Possible #and that unfortunately has to include culling them because there are not enough homes that can take in that many feral cats and there are #not enough zoos and sanctuaries to take in that many foxes and rabbits #Alright that’s it for THAT soapbox for now but because introduced animals and specifically domestic cats have done so much #ecological damage I absolutely can not promise it’s not going to come up again #because I am gonna use these to talk about conservation issues when I get the chance #Just Be Kind and Keep Your Cats Inside

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aka-indulgence · 2 years ago

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Hello @llamagoddessofficial :> Wrote another fanfic fanfic for you! I really love the good zoo siren au as someone who does some marine biologies, and I had a burst of inspiration so I wrote the first day working at the aquarium :D I loved writing the parallels hehee

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You were a janitor in the Ebott aquarium!!

Which, when you say out loud, does sound underwhelming. But you didn’t mind it. You had come to them in the hopes of becoming an intern, a volunteer, or a staff if things went your way. The lady at the information desk (who was very helpful), had looked quite apologetic when you asked her.

“I’m sorry… but we’re not looking for anymore creature carers at the moment.”

It was quite disappointing, but you weren’t expecting to get accepted straight away, anyway. And you’d already bought a ticket anyway, so you still had an aquarium day all to yourself, not like you were wasting your day. And you had a great day! If you weren’t caring for the animals directly, you were reassured by the fact that your payment is going to contribute to their care.

The day became even better when the lady recognized you on the way out and stopped you.

“We don’t have positions for carers right now, but… how would you like to be a cleaner? I’ll keep you up to date if there are any spots open.”

Naturally, you took it. It wasn’t like you had anything pressing for your schedule right now. As soon as a position opens- whatever it is- you were going to take it by the throat.

It was your first day. You were blasted with warmth as soon as you went in, having to quickly shed your winter clothes for the janitor uniform. It had little fish on the sleeves, which was a cute touch. It wasn’t the most glamorous job, of course. You spent more of your hours in the toilet than you did in the exhibit rooms. But any agitation you got from coming into a stall, only to see tissues strewn about on the floor like someone just blew up a roll after you had just cleaned; was quickly washed away when you went out, to the cool blues, the dancing lights cast in the darkened rooms. Even when you had to excuse yourself in front of the guests to wipe a drink spill in front of the giant ‘Pacific Bay’ aquarium, the music calmed your soul.

It wasn’t very quiet in the afternoon, what with the families and their 300 toddlers running about and crying babies. But when the day waned and the water glimmers dimmed, the one’s left were adults, couples. Then of course, the aquarium closed.

You worked up a sweat that clung to your uniform uncomfortably, after you scrubbed a mysterious stain on the floor leading to the gift shop that seemed to seep into the shiny tile, somehow.

“Hey, Julia?” You called; the lovely information lady that allowed you to have this opportunity in the first place; wandering about the empty entrance to check out. It felt like a bit of a ghost town all of a sudden, as you roamed the aquariums for any management-type people you could ask for help.

“I’m done, right? What should I…”

You stop when you walk by a doorway, into a room that was always darker than the rest, even when the sun was still up in the sky.

… You could walk back into the dinky staff room in the back of the building where they just gave up on aesthetics, a ‘modern’ and unsightly concrete structure. But… you could also just… say that you didn’t find anyone… right? And just… ‘got lost’... in the Deep Seas room…

Looking around, holding a cloth to your heart as if someone was going to chastise you if you hadn’t, you snuck into the room. It was hard to pass up on an opportunity like this.

Ebott aquarium was special, after all. They were one of the few aquariums in the world that had sirens. Three, to be in fact. One orca siren, one shark siren, and a deep sea cecaelia. A spectacular cast, to be sure- it wasn’t a surprise how they won so many awards over the years.

This room in particular was the cecaelia’s, the most reclusive of all the sirens.

You walked past the languid isopods, the floating nautilus, the sparkling comb jellies, to a giant opening in the room where the ceiling extended so you could see the entire tank in all its glory.

It usually looked empty, of course, but the few chances you get to see the cecaelia, it would be a shame to be unable to see him.

Though, as it was now, the tank looked uninhabited, as it usually was. This siren in particular was ‘shy’, though shy wasn’t the right word. It was more that he didn’t like being looked at, as to be expected with deep sea specieses.

Which is why this was the perfect opportunity for you. Julia told you about him- that he was more likely to emerge during after hours. They had cameras in the viewing room, for the purpose of recording his activity whenever he does something interesting to show visitors that he is in fact real, and they aren’t just displaying an empty tank for fun.

The TV display is off now, but you remember the video they posted online, where the most exciting thing that happened was him shooting out of the cave to grab the food they lowered into his tank, before quickly retreating back into the cave. There were screams of children and adults alike going wild.

You read the information board next to the TV.

Skull, Deep Sea Cecaelia

Sirenus cecaelia aequor

Ebott’s most recently acquired siren, Skull was found floating near the surface, a sign of disease or weakness in deep sea sirens. It is our belief that Skull recently acquired the crack in his skull. This may have caused him to grow uncontrollably, though our researchers argue that it might as well be due to deep sea gigantism.

Not much is known of deep sea cecaelias as of now, as they are the rarest encountered sirens in human history, and extensive observation we do have is in captivity, like Skull.

They are as enigmatic as they are beautiful, deep sea cecaelias are believed to live a mostly solitary life……

Your eyes scan through the text- having read most of it from the other day visit. Your sight is caught on the plaque next to the board, under the TV. You hadn’t noticed it before, with how full the room was. Boarded with wood and written on a golden plate, it reads:

In memory of Henry Freeman.

1975-20XX

Your squint when the gold plating starts shimmering a pinkish hue. And, did it get darker?

You follow the direction of the light to see…

“Whoa-lly shit!” You staggered.

Right there, against the glass, was Skull. He was big, you knew that, his size was listed right there on the board with a human outline next to his to show scale, and you’ve seen the videos of course- but that didn’t prepare you to see him in person.

Just his skeletal upper body dwarfed yours, bones thick and marred with scars of unknown battles deep below, where sunlight couldn’t reach. His pitch black tentacles waved around him like deep shadows in the darkness of the tank, suckers sticking and popping off the glass in tandem. At its base, a single tentacle was thicker than you were.

You held a hand up to your chest. Your heart had jumped at the giant shadow, that glowing red eye of his, the size of your fist, zeroing on you, and a great big smile full of characteristically sharp deep-sea teeth. It must’ve been instinctual fear, having a great predator looking at you, so close, only separated by a couple inches of glass.

The tips of his front tentacles were poking and tapping on the glass.

The initial adrenaline of fear quickly turned to curiosity and awe. You’ve never seen him with your own two eyes before, let alone so close- why was he out? Did he notice the empty room, and the lone ‘prey’ turned away from him and just lunged..?

“Hahahah, am I lucky to be on this side of the glass,” you joked, approaching the glass.

His eye stayed trained on you as you approached, his smile widening. He even lowered his head a little, like he was trying to get on eye level with you.

“Can’t tell if you’re curious about me or if you just really really want to eat me,” you giggle, at the way he was focused on you.

You pressed your hand to the glass, and practically squished your nose to it as you took him in. You could imagine the sounds those great big tentacles were as they moved like midnight waves.

You pull your head back in time to see his eye on your open palm against the glass. A great finger pointed to it, scratching the glass. Then… he presses his hand to the glass, right in front of yours.

Your mouth opens. Your hand just barely fits into his palm. You looked back to the cecaelia. This close, you could see all the little shift in his eyelight, flitting here and there, like he was paying close attention to the details in your face.

His eyelight cast a soft red on your face, your cheeks. A small glimmer in your eyes.

“This is…”

“Eeeeeee!”

You startle at the squeal, sounding like if a squeaky toy could get excited. When you turned around, you see a woman standing at the end of a hallway, in a white coat and white turtleneck, looking very ready to walk in the cold.

“U-uh,”

“How did you,” she strode over to you, long blond hair bouncing as she did, “how did you get him to do that?”

“I’m- sorry?” you sputter. Looking behind you, Skull had retreated a few paces to the back of the glass. “I was just… just…” you shrug, making a face when you remember you’re still holding the cleaning cloth, hiding it behind your back.

“Magnificent!” she stood next to you, one hand on the glass. “We’ve never seen him so interested in a human before. You had him against the glass!”

Skull was swimming around, darting from one corner to the other, keeping his eye on the both of you.

“He’s never done that?”

“Never!” she turns to you, conviction in her voice. “Skull doesn’t like being looked at, he usually hides in his cave when someone walks into the room, not… approach and give them a greeting. The only reason he isn’t rushing back is because he recognizes my face as ‘someone who gives the food’. And like you see now, he doesn’t give me any special greetings. Just having him out and about while someone is in view is stunning, let alone…”

“Oh, so do you feed him?” you ask. Hopefully you weren’t going to get chewed out for dawdling in the aquarium when you’re supposed to be clocked out 30 minutes ago.

“I do help with the feedings.” She says, then extends a hand to you. “Call me Mildred. I’m the head of the aquarium.”

“The… the head?!” Your eyes widen as you shook her hand. “I’m… I’m (Y/n), it’s an honor! To meet you!”

“Oh, please, I’m much more interested in you!” She smiles, the lines around her lips wrinkled with age, evidence of a lively woman. “Say… are you the new cleaning service Julia picked up?”

“Y-yeah! I mean. Yes,” You corrected yourself. You were talking to the big boss here, and you were a little bashful to find that she knows about you.

“You said you wanted experience in animal and magical creature care, right?”

“Absolutely,”

She presses a finger to her lips, as if thinking for a moment. She casts her eyes to the exhibit, where Skull was still circling above. Then she looks at you with a playful smile.

“... How would you like to come into the siren care team?”

Your heart rate spikes, and you sputter.

“I… wh… hhhhhreally?!”

#not gonna write a long fic!!!!!!!#probably #i might get inspo to write other scenes with the other Bones #im an aquarium enthusiast?? maybe???#i like good aquarium :>#heehee #aka writing #fanfic fanfic #fun fact: i have in fact worked in an aquarium! a small one but still!#good zoo siren au

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