Questions tagged [mammals]

Questions related to mammals, animals that nurse their young, have a neocortex, and three middle ear bones.

Filter by
Sorted by
Tagged with
1
vote
0answers
97 views

How “unique” human vagina is?

Regading penis Dixson showed that it is not really unique and complex. This argument (and there were some others) was used against the idea of human polygynandry. But what about vaginal shape? I know ...
1
vote
0answers
19 views

Is there any data to explore the heterozygosity of the South African lion over the last 18 years?

Background: I need to find data on the heterozygosity of the south African lion over the last 18 years... and I'm struggling: so far I have found a single data point. Question: Where can I find ...
1
vote
0answers
38 views

Are there mainstream views on the mandrill's coloration's being so unique?

According to the Wikipedia article: Mandrills are noted as being exceptionally colourful for mammalian standards. Charles Darwin wrote in The Descent of Man that "no other member in the whole ...
1
vote
0answers
10 views

Tests for object size discrimination in mammals?

Are there common testing protocols for establishing whether an animal (mammals especially) can distinguish the size of objects? In particular, are there procedures or is there good literature on ways ...
1
vote
0answers
153 views

How do marine mammals stay hydrated?

This is a question that has always bothered me. A quick internet search yields "metabolic processes" as the reason for how marine mammals obtain water, but what are those processes and why don't land ...
1
vote
0answers
29 views

How do bats manage lymph fluids?

We all know that bats hang upside down to sleep. I was watching some sleep for a while, and they don't move much while asleep. If I fall asleep sitting in a chair my lower legs will swell. Lymph ...
1
vote
0answers
59 views

What's the best sign language to teach a dolphin?

I know some scientists and trainers used hand signals to communicate with dolphins. The problem is: the dolphins have no hand to express themselves. With chimpanzees, we see how creative they are, not ...
1
vote
0answers
89 views

Why wrap a dolphin in wet towels?

In this video, a dolphin jumps into a vessel. Even though the guides know they will be quickly helping the dolphin back into the water, they first make sure they wrap the mammal with wet towels. Why ...
1
vote
0answers
57 views

Why do some macaques have redder faces than others?

I'm watching Monkey Kingdom, and I noticed some of the macaques have redder faces than others. Specifically the females, and as the social ladder increases, so does the redness. An alpha female: ...
1
vote
0answers
75 views

Why is a wound much more painful when damp?

Why is a wound much more painful when damp? This is a very strange phenomenon. For example: I have a little wound, not painful at all. But, when it is just damp, it is much painful.
1
vote
0answers
53 views

Omnivore vs Carnivore territory size

Edit: Large carnivores require lots of territory. What about bears? They're omnivores. How much does that count? Is there anywhere I could find weight/territory ratios for mammals, depending on diet? ...
1
vote
0answers
44 views

Are there any mammals whose males can feed with milk? [duplicate]

Are there any mammals whose males can feed the offsprings with milk from the breasts?
1
vote
0answers
87 views

How important is the womb's environment?

- Background - Talking about one phenotypic trait, the total phenotypic variance $V_p$ is decomposed into genetic and environmental variance for this trait, represented by the symbols $V_G$ and $V_E$ ...
0
votes
3answers
81 views

Could a mammal convert ingested dissolved CO2 to usable energy?

I'm trying to find out if it's possible that a mammal could orally ingest dissolved CO2 and convert it to energy for body heat, organ function, etc. Unfortunately, most of the scientific sources I've ...
0
votes
2answers
403 views

What Makes an Afrothere an Afrothere?

The mole-like golden moles. The hedgehog-like tenrecs. The shrew-like sengis. The rodent-like hyraxes. The anteater-like aardvarks. The whale-seal-hybrid-like sirens. The tapir-like ...
0
votes
1answer
187 views

What is the evolutionary purpose of white spots in nails and how can they be characterised due to Leukonychia? [closed]

Suppose you haven't hit your nails so the white spots are due to Leukonychia. Are the discoloration i.e. the white spots due to lower porosity (less minerals absorbing) or some other factor? I ...
0
votes
1answer
38 views

Limbs in synapsids

Within synapsids, there was a change from a lizard-like sprawling posture (like in pelycosaurs) to a more erect stance. Non-eucynodont eutherapsids seem to have had a facultatively erect hindlimb and ...
0
votes
1answer
907 views

Is there any known reason why 6 leg mammals are only found in mutations? [duplicate]

Taking a look in internet you can find photos of mutated mammals with 6 legs. Some cows with legs in unnatural positions were shown in website versions of widely known newspapers (you can easily guess ...
0
votes
1answer
49 views

Albino elephants

How many albino elephants are there across the world? There is no information on the total number of albino elephants across the world except for the few albino elephants captured by people.
0
votes
1answer
64 views

Why do teeth decay of sugar?

Sugars is a common component in diet of mammals. Why then their teeth did not develop resistence to sugar decay?
0
votes
1answer
69 views

About the plight of Elephants and efforts to conserve them? [closed]

Poachers are only after the ivory horns right? I read this story from the New York Times ( I think) of saving a Rhinocerous by some Park Rangers and a Vet. ( forgive spelling) ; they tranquilized the ...
0
votes
1answer
75 views

In what circumstances does a mammalian egg copy its DNA?

In the 2nd episode of the new Cosmos series, the host Neil deGrasse Tyson shows how the white-furred bear could have evolved (reasonable scientific speculation, of course). If you haven't seen that ...
0
votes
1answer
122 views

Why do mammals in the wild retain the “trait” of menstruating with blood? [duplicate]

This question intrigued me a lot since if animals in the wild did have menstruation with blood flow, wouldn't all that blood be attracting every other predator in the vicinity?
0
votes
0answers
30 views

Petting sensation of mammals

Do other mammals get a similar enjoyment from petting as we get from scratching an annoying itch? Maybe a stronger version of it? Since dogs do emulate scratching themselves with their hind legs when ...
0
votes
0answers
19 views

Age until physical growth ceases, mammals

Fairly basic, but I am seeking a table showing how many years from birth it takes for the best-known mammals to stop growing. (Including the latest on humans - ie. 0-17..?).
0
votes
0answers
54 views

Mammal Statistics about Natural Death Versus Being Killed?

Is there data determining what percentage of mammals die a natural death (disease, old age) and what percentage die due to being killed and/or eaten by other mammals? In watching wildlife ...
0
votes
0answers
17 views

Non-hair synapsid integument

Anybody noticed that mammal skin (both with hair and without hair) has an irregular scaly pattern when seen up really close? If so, may it have been retained from its pelycosaur and even reptiliomorph ...
0
votes
0answers
258 views

Mammal size and capillary wall thickness

How does capillary wall thickness vary with the size of the animal? Background/context of question: Of the following, Figure 1 is most consistent with the fact that, in general, smaller mammals have:...
0
votes
0answers
859 views

What was the first animal having fur?

Did all early mammals have fur? Is it possible to trace the origins, how early animals with fur looked like and how it evolved?
0
votes
0answers
223 views

These Mammals Had a Good Run, So What Happened? [closed]

One of the great mysteries of the mammals is that some of the longest-lasting just aren't with us today. The list of these puzzling unfortunates is as follows: Paleomerycidae DURATION: 55.8 to 4.9 ...
0
votes
0answers
29 views

Is it possible for two creature in the same order and have odd haploid chromosome species to reproduce

Take the degu and the rat for example. The degu has 29 chromosome pairs Rats have 21 chromosome pairs. They are only share the same order ( Rodentia ) Would it be possible for them to reproduce? ( ...
0
votes
1answer
29 views

Do the individual claws of a bear have names?

The question seems pretty self-explanatory (if perhaps a little odd). Anatomical names or colloquial names are both appreciated, especially the latter if they exist.
-1
votes
1answer
517 views

Are ape communities more “anarchist” or “communist” in structure?

I am using these terms because we can imagine them quite good, I guess ;) By "anarchist" I mean that the ape wants to live without the rule of others apes(same biological race or other) and he pursue ...
-1
votes
1answer
108 views

When you lose weight, how does the mass exit your body?

As a thought experiment, consider the case of Angus Barbiery, who allegedly lost almost 200kg in about a year by not eating at all, save for necessary nutrients provided as supplements. My question ...
-1
votes
1answer
46 views

Are these principles worth being validated? [closed]

Odunayo's principle of inhalation states that provided a given amount of water is ingested, inhalation through the nostrils will be excluded due to the presence of oxygen in the water. From the above ...
-2
votes
2answers
725 views

Why do animals have fur and feathers?

Does it give them protections from harm? Sphynx cats, being furless, can get hurt from thorns if they go through bushes So I'm assuming it's more like defense from animals biting them. A lion mane ...

1 2 3
4