Aplysia dactylomela: Difference between revisions
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'''''Aplysia dactylomela''''', [[common name]] the "'''spotted sea hare'''", is a [[species]] of large sea [[slug]], a [[marine (ocean)| marine]] [[opisthobranch]] [[gastropod]] [[ |
'''''Aplysia dactylomela''''', [[common name]] the "'''spotted sea hare'''", is a [[species]] of large sea [[slug]], a [[marine (ocean)| marine]] [[opisthobranch]] [[gastropod]] [[mollusc]] in the family [[Aplysiidae]], the sea hares. |
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==Description== |
==Description== |
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==Habitat== |
==Habitat== |
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''Aplysia dactylomela'' is commonly found in shallow waters, tide pools and rocky and sandy substrates, they also will be found feeding in beds of [[ |
''Aplysia dactylomela'' is commonly found in shallow waters, tide pools and rocky and sandy substrates, they also will be found feeding in beds of [[sea grass]]. During the day they will mostly hide under large rocks and in crevices. They usually stay in relatively shallow water, but they have been found as deep as 40m.<ref>Sterrer, Wolfgang. 1986. ''Marine Fauna and Flora of Bermuda''. A Wiley-Interscience Publication.</ref> |
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==Distribution== |
==Distribution== |
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== Defence == |
== Defence == |
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Like the octopus, the ''Aplysia dactylomela'' squirts purple ink if it is disturbed; this ink is an irritant that causes 'altered |
Like the octopus, the ''Aplysia dactylomela'' squirts purple ink if it is disturbed; this ink is an irritant that causes 'altered behaviour' in other invertebrates and fish.<ref>Carefoot, T.H, S.C. Pennings, Jean Paul Danko. 1999. A test of novel function(s) for the ink of sea hares. J. Exp. Mar. Bio. Ecol. 234 (2):185.</ref> Their leathery skin contains [[toxin]]s which make this sea hare practically inedible to most predators.<ref>http://www.thecephalopodpage.org/MarineInvertebrateZoology/Aplysiadactylomela.html</ref> |
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==References== |
==References== |
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Revision as of 21:12, 21 March 2010
| Aplysia dactylomela | |
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| Aplysia dactylomela | |
| Scientific classification | |
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| Species: | A. dactylomela
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| Aplysia dactylomela (Rang, 1828)
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Aplysia dactylomela, common name the "spotted sea hare", is a species of large sea slug, a marine opisthobranch gastropod mollusc in the family Aplysiidae, the sea hares.
Description
The colour of the spotted sea hare is very variable, from pale gray to green, to dark brown. There are almost always large black rings on the mantle.
Habitat
Aplysia dactylomela is commonly found in shallow waters, tide pools and rocky and sandy substrates, they also will be found feeding in beds of sea grass. During the day they will mostly hide under large rocks and in crevices. They usually stay in relatively shallow water, but they have been found as deep as 40m.[1]
Distribution
This species of sea hare is cosmopolitan, being found in almost all tropical and temperate seas, including recently the Mediterranean Sea.
Human use
The right giant neuron of Aplysia dactylomela, which is found in the abdominal ganglion, is similar to that of vertebrates, meaning it is ideal for the study of electrophysiology, as well as conditioned-response studies. These neurons have been found to be invaluable in neurological research; the reason for this is that long lasting effects in neuronal behavior can be detected.[2]
Behaviour
The Aplsia dactylomela is capable of swimming and crawling. It accomplishes the former by creating a funnel using the parapodia folded forward and downwards; this action pulls in water. It then pushes the water out from behind the animal by pressing the anterior parts of the parapodia together, thus forward motion is achieved.
The sea hare's usual mode of propulsion is crawling; it crawls by lifting the front end of the foot, stretching it forward then placing it on the ground in front, creating an arching pattern; the remainder of the body follows this arching pattern until the tail is reached.[3]
Defence
Like the octopus, the Aplysia dactylomela squirts purple ink if it is disturbed; this ink is an irritant that causes 'altered behaviour' in other invertebrates and fish.[4] Their leathery skin contains toxins which make this sea hare practically inedible to most predators.[5]
References
- ^ Sterrer, Wolfgang. 1986. Marine Fauna and Flora of Bermuda. A Wiley-Interscience Publication.
- ^ Corning, W., J. Dyal. 1973. Invertebrate Learning: Volume 2. New York: Plenum Press.
- ^ http://animaldiversity.ummz.umich.edu/site/accounts/information/Aplysia_dactylomela.html
- ^ Carefoot, T.H, S.C. Pennings, Jean Paul Danko. 1999. A test of novel function(s) for the ink of sea hares. J. Exp. Mar. Bio. Ecol. 234 (2):185.
- ^ http://www.thecephalopodpage.org/MarineInvertebrateZoology/Aplysiadactylomela.html
External links
