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8
votes
3answers
149 views

Are there echolocating insects?

Echolocation is the ability to obtain spatial information of the surroundings from echos generated by the animal. There are bats and other vertebrates that naturally use it. I was wondering if this ...
7
votes
1answer
70 views

Which poison makes seastars inedible to possible predators?

In the new citizen science project (see: Sea Floor Explorer), numbers of seastars, scallops, crustaceans and other animals are counted. Already one can see a heavy bias in favor of seastars, both the ...
7
votes
1answer
127 views

Are there any theories why such an imbalance in chirality of molluscs?

Most gastropods exhibit sinistral (right hand) winding of their shells. But very few species are anti sinistral. Have there been any theories as to why such a great difference?
7
votes
1answer
54 views

Is the number of legs in myriapoda determined entirely by the genome?

Myriapoda (comprising, among others, millipedes and centipedes) can have hundreds of legs (Illacme plenipes having up to 750 legs). Interestingly, the number of legs (or leg pairs) appears to differ ...
6
votes
0answers
37 views

Selection for possibly less efficient egg transfer in Human Botfly life cycle

I have heard that the Human Botfly transfers its eggs through other invertebrates [1], and it strikes my curiosity that if an insect could simply land on its host directly to deposit its eggs, then ...
5
votes
2answers
2k views

Do octopuses have better eyes than humans?

I've read that unlike humans, octopuses have eyes "designed" the "right way", i.e. with the nerve fibers behind the retina, thus getting rid of the blind spot we humans have as well as theoretically ...
4
votes
1answer
726 views

Help me Identify this Spider

This red spider has set up a web in my yard, in South Eastern, Texas, United States: The spider itself is about an inch long (2.5 cm), and is predominantly red to brown in color, with red legs, and ...
4
votes
0answers
74 views

Do invertebrates dream? [closed]

From Wikipedia: Studies have observed dreaming in mammals such as monkeys, dogs, cats, rats, elephants and shrews. There have also been signs of dreaming in birds and reptiles. Have there ...
2
votes
1answer
26 views

Which is the guideline to choose a molecular target to identify vertebrate hosts from arthropod bloodmeals?

There are some molecular targets to identify vertebrate hosts from arthropod bloodmeals including the Cyt b gene and the COI gene. Which are the standards or characteristics that I have to bear in ...
1
vote
1answer
59 views

will an earthworm survive after covering its skin with a wet cloth

I am very curious about this question. I got this doubt when I was studying anatomy and physiology of the earthworm Lampito mauritii. It breathes through its skin (cutaneous respiration) and if we ...
0
votes
1answer
65 views

What is this discarded exoskeleton from?

This morning I was looking round the garden and found this sticking out of a pit in patch of soil, next to the wall of the house (in a trough sort of thing). I came to the conclusion it must be part ...
0
votes
2answers
147 views

Can jellyfish swim backwards?

Jellyfish use jet propulsion to move forward, according to http://earthsky.org/earth/how-do-jellyfish-swim. Otherwise, they drift with the ocean currents. Does this mean that, without the presence of ...
0
votes
1answer
193 views

What is the difference between these worms: Caenorhabditis elegans and Eisenia fetida?

I love worm composting (I use red wiggler worms), but wondering how similar or different the Caenorhabditis elegans and Eisenia fetida are?