Live snails not in shell

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. remember, however, that there is not much known about colours in apple snails, and that this page is more a sort of hypothesis of how the possible mechanisms could work. play with the genes: in the interactive example below, one can switch on and off the colour genes. these genes are available in at

. only when both genes are switched off, the colour is absent in the snail (single-gene recessive). keep in mind that this is an example of how the inherit colour variations in these snails may work. select which genes should be active: resulting snail type gene for dark shell pigment on chromosome copy...

https://applesnail.net/content/genetics/colour_genes/colour_genes.htm

insularum . shel l: the shell of this apple snail species is globose and relatively heavy (especially in older snails). the to whorls are separated by a deep, indented suture (hence the name 'canaliculata' or 'channeled'). the shell opening (aperture) is large and oval to round. males are known to have

a rounder aperture than females. the umbilicus is large and deep. the overal shell shape is similar to that of pomacea lineata, except the deeper sutures and more globose shape in canaliculata. the size of these snails varies from to mm wide and to mm high depending on the conditions. the colour varies...

https://applesnail.net/content/species/pomacea_canaliculata.htm

attached to the inside of the shell and enveloping the head-neck and the gills-lung area of the body. the top of the mantle cavity (the part away from the shell opening or the posterior part) is separated in two chambers, the left one forms the lung and right one contains the gill (ctenidium) with the

hypobranchial gland in between the rectum and the gill. the latter (hypobranchial gland) secretes mucus into the mantle cavity. the bottom of the mantle cavity (anterior) is the mantle edge, which fits against the shell opening (aperture) and has an important function: it is the growing edge for the...

https://applesnail.net/content/anatomy/foot_mantle.php

pomacea columellaris (gould, ) pomacea (pomacea) columellaris (gould, ) shell : the shell of this apple snail species is oval with a sharp spire and relatively heavy (especially in older snails). the suture angle between the whorls is more than °. the shell opening (aperture) is oval to round at the

base, but with makes a sharp angle at top. the size of these snails varies from to mm high depending on the conditions. the umbilicus is closed. the shell has a light base colour (gray-brown to greenish-blue), a bit stone-like yellow with faint, non-contineous brown spiral bands. operculum: the operculum...

https://applesnail.net/content/species/pomacea_columellaris.htm

hamburg (nf) , pp. bever, m. m & borgens, r. b. . eye regeneration in the mystery snail. journal of experimental zoology, : - . bieler, r. . book review (vergleichende anatomie ... berthold, t, ) and cloadistic re-analysis. the veliger, ( ): - . brown, d. s. . freshwater snails of africa and their medical

the large fresh-water snail pila ovata (ampullariidae) - i. changes in oxygen uptake. como. biochem. physiol., : - . coles, g. c. . the termination of aestivation in the large fresh-water snail pila ovata - ii. in vitro studies. comp. biochem. physiol., : - . cowie, r. h. . identity, distribution and...

https://applesnail.net/content/literature.php

pila globosa pila globosa (swainson, ) pila globosa (picture not licenced under creative commons) shell : the shell is globose with an oval opening. in contrast with pila ampullacea , pila globosa has a large and deep umbilicus. the colour varies from olive green to grey green with a tinge of red. a

large number of variations are known. the interior of the shell is dull reddish with very faint spiral bands visible, white at the columella. operculum: the operculum is calcified at the inside (part attached to the snail). body: ?...

https://applesnail.net/content/species/pila_globosa.htm

abstract density-dependent growth and reproduction of the apple snail, pomacea canaliculata: a density manipulation experiment in a paddy field tanaka k, watanabe t, higuchi h, miyamoto k, yusa y, kiyonaga t, kiyota h, suzuki y, wada t tanaka k, natl inst agroenvironm sci, lab populat ecol, - - kannondai

, tsukuba, ibaraki , japan abstract to examine density dependence in the survival, growth, and reproduction of pomacea canaliculata, we conducted an experiment in which snail densities were manipulated in a paddy field. we released paint-marked snails of - mm shell height into enclosures (pens) of m(...

https://applesnail.net/content/abstracts/tanaka_growth_canal_paddy_1.htm

home page site map general zone internet resource zone www directory kid's zone teacher's zone malacology zone search mysteries contact me dear visitors, due to an ongoing, serious illness at this time, i will not be keeping this page up for . if you have a shell or a shell fossil at home and you just

data, if you have any, to me, avril bourquin . i will set up a file page for your shell or fossil shell then people can contact you personally in regards to their idea as to your shells proper identification. please try to keep your jpg files small. this kind of service is also available from some other...

http://www.manandmollusc.net/id_help.html

bio-agent bio-agent using apple snails as a biological control agent for parasites apple snails (ampullariids) are usable as biological control agents for other bulinus and biomphalaria snails. these pulmonate snails are an intermediate host for trematoda parasites that can affect man and cause swimmers

itch and schistomiasis. although apple snails do get infected, the parasite isn't able to complete its life cycle in most apple snails and no infectious larvea are released from the snails. however, several reports have revealed that apple snails can carry and release non-human schistosome trematodes...

https://applesnail.net/content/various/bio-agent.htm

author of the apple snail website author of applesnail.net the author, stijn a. i. ghesquiere , has a master in biomedical sciences, a master in medicine and a phd in molecular genetics, and currently works as clinical cytogeneticist. in his free time is is often playing with his children, taking photographs

, reading slashdot, watering and watching (not speaking to) his asclepiads, looking at his apple snails, reading lort or the rings, meeting friends or can be found in jin jung korean martial arts centre practising hapkido and haedong kumdo. how to contact me: option : how to reach me: you can become...

https://applesnail.net/content/author.htm