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hatching.
AXOLOTLS - FEEDINGSEE MORE ON AXOLOTL.ORG AXOLOTLS - REQUIREMENTS & WATER CONDITIONS IN CAPTIVITYSEE MORE ONAXOLOTL.ORG
AXOLOTLS - SEARCH RESULTS Water chemistry, temperature, companions? Tips for Breeding and Rearing. Plus: Colour Genetics & Health. Further Reading. Talk Axolotls at the Axolotl Forum! AXOLOTLS - ADVANCED SEARCH Advanced Search. Keywords: Do phrase matches. Phrases matching the order in which you typed keywords above. Do whole word matching. Whole words is a word on it's own - partial words is where a word matches within a word. Do partial word matching. Give extra high relevance if all keywords is present on a page.INDEX OF /IMAGES/
Proudly Served by LiteSpeed Web Server at www.axolotl.org Port 80 AXOLOTLS: THE FASCINATING MEXICAN AXOLOTL AND THE TIGERHOMEHOUSINGFEEDINGREQUIREMENTSBREEDINGBIOLOGY The Axolotl is a fascinating creature for a number of reasons, including its grotesque appearance, its ability to regenerate, and primarily the fact that it exhibits the phenomenon known as neoteny. Ordinarily, amphibians undergo metamorphosis from egg to larva (the AXOLOTLS - HEALTH & DISEASESSEE MORE ON AXOLOTL.ORG AXOLOTLS - METAMORPHOSED & TIGER SALAMANDERSSEE MORE ON AXOLOTL.ORG AXOLOTLS - BREEDING AXOLOTLS SUCCESSFULLYSEE MORE ON AXOLOTL.ORG AXOLOTLS - EMBRYO PHOTO LOG - AXOLOTLS: THE FASCINATING Introduction. In the late 90s I bred axolotls for the first time. This page presents a daily photographic log of the development of the eggs laid by a female melanoid albino (fathered by a golden albino which carried the melanoid gene), from the day of laying to the day ofhatching.
AXOLOTLS - FEEDINGSEE MORE ON AXOLOTL.ORG AXOLOTLS - REQUIREMENTS & WATER CONDITIONS IN CAPTIVITYSEE MORE ONAXOLOTL.ORG
AXOLOTLS - SEARCH RESULTS Water chemistry, temperature, companions? Tips for Breeding and Rearing. Plus: Colour Genetics & Health. Further Reading. Talk Axolotls at the Axolotl Forum! AXOLOTLS - ADVANCED SEARCH Advanced Search. Keywords: Do phrase matches. Phrases matching the order in which you typed keywords above. Do whole word matching. Whole words is a word on it's own - partial words is where a word matches within a word. Do partial word matching. Give extra high relevance if all keywords is present on a page.INDEX OF /IMAGES/
Proudly Served by LiteSpeed Web Server at www.axolotl.org Port 80AXOLOTLS - BIOLOGY
Biology of Axolotls. The Axolotl is unusual in nature because it retains its larval form into adulthood. In fact, it becomes sexually mature in this state. This adaptation, known as neoteny, is often viewed as a backward step in evolution because it prevents the axolotl from living on land, and as a result, it can't colonise new habitats. AXOLOTLS - HEALTH & DISEASES Introduction. You may find it helpful to read this page in combination with the Requirements and Water Conditions Page, and also the Frequently Asked Questions.There is a section on the Requirements Page dealing with temperature and the stress it causes, and a section that deals with water flow.The Frequently Asked Questions Page contains answers to specific problems people have encountered. AXOLOTLS - METAMORPHOSED & TIGER SALAMANDERS Background. The Axolotl is a "perennibranchiate" salamander (it never loses its gills). I talked about this on the cover page of the site, but what happens when an axolotl decides to beat the odds and metamorphose any how? It happens. And what about the fact that many hobbyists who are interested in axolotls also keep tiger salamanders (Ambystoma tigrinum* and Ambystoma mavortium spp.*)? AXOLOTLS - GENETICS AND COLOUR This page will attempt to give a brief overview of axolotl genetics, mainly from the viewpoint of the hobbyist, who tends to be most interested in colour. Axolotls have 28 chromosomes per cell, in fourteen pairs. Humans have 46 chromosomes in 23 pairs. A chromosome is a thread-like structure composed of DNA and protein.AXOLOTLS - FEEDING
The Indiana University Axolotl Colony, when it still existed, fed its axolotls with high protein and vitamin fortified pellets designed for salmon (5 mm diameter for adults, 3 mm for younger axolotls). The pellets are 45% protein and 20% fat. Following their lead, I tried feeding my axolotls with locally available trout pellets (46% protein,16
AXOLOTLS - HOUSING IN CAPTIVITY General Info . The Requirements Page and Health Page discuss several important points that are mentioned on this page. For information regarding the housing of tiger salamanders and metamorphosed axolotls, click that link.. Axolotls are not demanding in respect to their accommodation. It's important to bear in mind that an adult axolotl can reach a size from 18 to 35 cm in length (7-14 inches). AXOLOTLS - REARING FROM EGG TO ADULT Newly hatched axolotl larvae can vary in size from 10-13 mm (roughly 0.5 inch). On hatching, they will still possess some egg yolk in their stomachs (the white substance that should be quite visible to the naked eye). Until this is used up they will be motionless and won'trequire food.
AXOLOTLS - FREQUENTLY ASKED QUESTIONS c) Tiger salamanders are generally a sandy green in colour until they begin to metamorphose. The one pictured above is typical. wild type axolotls are brown, grey, or dark brown, and usually have smallish dark spots over their entire body. If tigers have spots, they tend to be pale yellow and barely noticeable. INDEX OF /IMAGES/BREEDING/ Parent Directory 12-Apr-2020 06:19 - larvae 12-Apr-2020 06:19 - 106_hour_eggs.jpg 29-Nov-2004 19:21 12k 10_hour_eggs.jpg 29-Nov-2004 19:21 12k 130_hour_eggs.jpg 29 INDEX OF /IMAGES/HEALTH/ Parent Directory 12-Apr-2020 06:19 - Gabriela_Grabler_27030.jpg 30-Nov-2004 23:09 52k inject_side.jpg 29-Nov-2004 19:34 12k inject_top.jpg 29-Nov-2004 19:34 16k stressed_gills.jpg 29-Nov-2004 19:34 48k stressed_tail_views.jpg 29-Nov-2004 19:34 36k . Proudly Served by LiteSpeed Web Server at www.axolotl.org Port 80 AXOLOTLS: THE FASCINATING MEXICAN AXOLOTL AND THE TIGERHOMEHOUSINGFEEDINGREQUIREMENTSBREEDINGBIOLOGY The Axolotl is a fascinating creature for a number of reasons, including its grotesque appearance, its ability to regenerate, and primarily the fact that it exhibits the phenomenon known as neoteny. Ordinarily, amphibians undergo metamorphosis from egg to larva (the AXOLOTLS - HEALTH & DISEASESSEE MORE ON AXOLOTL.ORG AXOLOTLS - METAMORPHOSED & TIGER SALAMANDERSSEE MORE ON AXOLOTL.ORG AXOLOTLS - BREEDING AXOLOTLS SUCCESSFULLYSEE MORE ON AXOLOTL.ORG AXOLOTLS - FEEDINGSEE MORE ON AXOLOTL.ORG AXOLOTLS - HOUSING IN CAPTIVITY General Info . The Requirements Page and Health Page discuss several important points that are mentioned on this page. For information regarding the housing of tiger salamanders and metamorphosed axolotls, click that link.. Axolotls are not demanding in respect to their accommodation. It's important to bear in mind that an adult axolotl can reach a size from 18 to 35 cm in length (7-14 inches). AXOLOTLS - SEARCH RESULTS Water chemistry, temperature, companions? Tips for Breeding and Rearing. Plus: Colour Genetics & Health. Further Reading. Talk Axolotls at the Axolotl Forum! AXOLOTLS - REARING FROM EGG TO ADULTSEE MORE ON AXOLOTL.ORG AXOLOTLS - ADVANCED SEARCH Advanced Search. Keywords: Do phrase matches. Phrases matching the order in which you typed keywords above. Do whole word matching. Whole words is a word on it's own - partial words is where a word matches within a word. Do partial word matching. Give extra high relevance if all keywords is present on a page.INDEX OF /IMAGES/
Proudly Served by LiteSpeed Web Server at www.axolotl.org Port 80 AXOLOTLS: THE FASCINATING MEXICAN AXOLOTL AND THE TIGERHOMEHOUSINGFEEDINGREQUIREMENTSBREEDINGBIOLOGY The Axolotl is a fascinating creature for a number of reasons, including its grotesque appearance, its ability to regenerate, and primarily the fact that it exhibits the phenomenon known as neoteny. Ordinarily, amphibians undergo metamorphosis from egg to larva (the AXOLOTLS - HEALTH & DISEASESSEE MORE ON AXOLOTL.ORG AXOLOTLS - METAMORPHOSED & TIGER SALAMANDERSSEE MORE ON AXOLOTL.ORG AXOLOTLS - BREEDING AXOLOTLS SUCCESSFULLYSEE MORE ON AXOLOTL.ORG AXOLOTLS - FEEDINGSEE MORE ON AXOLOTL.ORG AXOLOTLS - HOUSING IN CAPTIVITY General Info . The Requirements Page and Health Page discuss several important points that are mentioned on this page. For information regarding the housing of tiger salamanders and metamorphosed axolotls, click that link.. Axolotls are not demanding in respect to their accommodation. It's important to bear in mind that an adult axolotl can reach a size from 18 to 35 cm in length (7-14 inches). AXOLOTLS - SEARCH RESULTS Water chemistry, temperature, companions? Tips for Breeding and Rearing. Plus: Colour Genetics & Health. Further Reading. Talk Axolotls at the Axolotl Forum! AXOLOTLS - REARING FROM EGG TO ADULTSEE MORE ON AXOLOTL.ORG AXOLOTLS - ADVANCED SEARCH Advanced Search. Keywords: Do phrase matches. Phrases matching the order in which you typed keywords above. Do whole word matching. Whole words is a word on it's own - partial words is where a word matches within a word. Do partial word matching. Give extra high relevance if all keywords is present on a page.INDEX OF /IMAGES/
Proudly Served by LiteSpeed Web Server at www.axolotl.org Port 80AXOLOTLS - BIOLOGY
Biology of Axolotls. The Axolotl is unusual in nature because it retains its larval form into adulthood. In fact, it becomes sexually mature in this state. This adaptation, known as neoteny, is often viewed as a backward step in evolution because it prevents the axolotl from living on land, and as a result, it can't colonise new habitats. AXOLOTLS - HEALTH & DISEASES Introduction. You may find it helpful to read this page in combination with the Requirements and Water Conditions Page, and also the Frequently Asked Questions.There is a section on the Requirements Page dealing with temperature and the stress it causes, and a section that deals with water flow.The Frequently Asked Questions Page contains answers to specific problems people have encountered. AXOLOTLS - EMBRYO PHOTO LOG - AXOLOTLS: THE FASCINATING Introduction. In the late 90s I bred axolotls for the first time. This page presents a daily photographic log of the development of the eggs laid by a female melanoid albino (fathered by a golden albino which carried the melanoid gene), from the day of laying to the day ofhatching.
AXOLOTLS - GENETICS AND COLOUR This page will attempt to give a brief overview of axolotl genetics, mainly from the viewpoint of the hobbyist, who tends to be most interested in colour. Axolotls have 28 chromosomes per cell, in fourteen pairs. Humans have 46 chromosomes in 23 pairs. A chromosome is a thread-like structure composed of DNA and protein. AXOLOTLS - FREQUENTLY ASKED QUESTIONS c) Tiger salamanders are generally a sandy green in colour until they begin to metamorphose. The one pictured above is typical. wild type axolotls are brown, grey, or dark brown, and usually have smallish dark spots over their entire body. If tigers have spots, they tend to be pale yellow and barely noticeable. AXOLOTLS - BOOKS AND LINKS - AXOLOTLS: THE FASCINATING Scott, Peter W., "Axolotls", 1981, T.F.H. Publications. Later reissued as "Axolotls: Care and Breeding in Captivity", 1995, T.F.H. Publications. This book begins by describing the Axolotl's obscure name and significance and goes on to cover its feeding, housing, breeding, genetics, and diseases. If you own an Axolotl as a pet, thisis the book
AXKNOWLEDGEMENTS ;)
Acknowledgements. I would like to make the following acknowledgements. The first section is for any images or material I have cited that are from sources other than myself, and the second section is to individual institutions and people who have helped me in my search to learn more about axolotls. All other images and photographs are bymyself.
AXOLOTLS - SOCIAL BOOKMARKING These links go to sites that allow you to store, tag and share links across the internet. You can share these links with anyone and the more people who share this particular site, the more people willnotice it.
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INTRODUCTION
Advanced Search | Search Forum Welcome! This web site is devoted to the Axolotl (pronounced Ax-oh-lot-ul), scientific name _Ambystoma mexicanum_. The site describes the Axolotl's background, biology, and care in captivity. You will also find information about the Tiger Salamander , _Ambystoma tigrinum_ and _Ambystoma mavortium_ spp., because these animals are closely related. Australians and New Zealanders frequently refer to the Axolotl as the Mexican Walking Fish, though the Axolotl is not a fish but an amphibian, a salamander, part of the order Caudata/Urodela. Because it's a salamander, it's part of one of the three branches of class Amphibia, which also includes the frogs and toads(the Anurans ),
and the mainly eel-like order, Gymnophiona, which are also known as the Caecilians. Have a look at the Biology Page for a short guide to the Axolotl's body and characteristics. One common misconception is that axolotls and other salamanders are lizards or reptiles. In fact, amphibians are a completely separate group of animals. For example, did you know that reptiles and human beings have a four-chambered heart? Well amphibians have only three chambers. That's just one example of how appearance can be deceiving: salamanders might look like lizards, but they are very differentindeed.
This page is a brief introduction for those new to the Axolotl and salamanders. If you require specific information, you can search this site using the search facility at the top right of this page. Caudata.org also contains a wealth of axolotl information and it's a great place to buy axolotls or trade with other hobbyists. Caudata.org is the Internet's premier source of salamander and newt information and it places an emphasis on their maintenance in captivity. There is a very busy axolotl forum at Caudata.org, used by people
just like you. I hope that you find this site useful, but most of all I hope you enjoy what you read and find here. If you're looking for information about metamorphosed axolotls, click here.
Axolotls of various colours occur in captivity, including grey, shades of brown, leucistic (white with black eyes), golden albino, white albino, as well as other varieties, such as the melanoid (a near-black animal). The normally coloured axolotl, the "wild type", can be near-black like the one in the group photo to the left, chocolate brown like the one in the site's logo, or even creamy in colour, and anywhere in between. There are even "piebald" axolotls in variouscolours
, and
a variety that is piebald in more than one colour, known as the "harlequin". You can learn more about how colour comes about and how it is passed on by taking a look at the Genetics Page . And why not take a look at the hundreds of photos of the weird and wonderful varieties of axolotls submitted by enthusiasts like yourself at the Axolotl Section of the Caudata.org User Photo Galleries?
The name "Axolotl" comes from the Aztec language, "Nahuatl". One of the most popular translations of the name connects the Axolotl to the god of deformations and death, Xolotl, while the most commonly accepted translation is "water-dog" (from "atl" for water, and "xolotl", which can also mean dog). Prior to the growth of Mexico city in the basin of Mexico, the Axolotl was native to both Lake Xochimilco, and Lake Chalco. Of these two high altitude freshwater lakes, only the remnants of Xochimilco as canals can be seen today. Unfortunately many information sources mention these lakes as if they still exist (such as this ill-researched article about a metamorphosed axolotl on the BBC News Web site). If
only this were still the case: sadly it is rarely caught in the wild but at least the Axolotl is now on the CITES endangered species list. There have been
efforts to breed and release the animal, in order to re-establish its numbers. However the location of the remaining waterways where the animal may live (located in the Mexico City metropolitan area) are likely to be very threatened by the city's continuing expansion and the days of the species surviving in the wild are surely quite limited. Fortunately, due to the importance of the Axolotl in scientific research, it is unheard of for them to be taken from the wild for that purpose because of the huge numbers bred in captivity each year. There are related Mexican _Ambystoma_ species that also remain gilled as adults. These species are located in water bodies further from Mexico city and may have a slightly brighter future in the wild than the Axolotl. Despite its endangered status, the use of the Axolotl as a laboratory animal should ensure the species' survival, if only in captivity. It has long been known that the Axolotl is a worthy study due to its amazing healing and regeneration abilities. Normal wound healing in animals occurs through the growth of scar tissue, which is not the same as the original tissue, nor is it as robust. Normal wound healing also does not allow for most animals to re-grow a lost limb. However the axolotl is fully capable of complete limb re-growth. The animal has the added scientific attraction of having especially large embryos, making it easier to deal with under laboratory conditions. Its embryo is also very robust, and can be spliced and combined with different parts of other axolotl embryos with a high degree ofsuccess.
The Axolotl is a fascinating creature for a number of reasons, including its grotesque appearance, its ability to regenerate, and primarily the fact that it exhibits the phenomenon known as neoteny. Ordinarily, amphibians undergo metamorphosis from egg to larva (the tadpole of a frog is a larva), and finally to adult form. The Axolotl, along with a number of other amphibians, remains in its larval form throughout its life. This means that it retains its gills and fins, and it doesn't develop the protruding eyes, eyelids and characteristics of other adult salamanders. It grows much larger than a normal larval salamander, and it reaches sexual maturity in this larval stage. Another term to describe this state is "perennibranchiate". The animal is completely aquatic, and although it does possess rudimentary lungs, it breathes primarily through its gills and to a lesser extent, its skin. It is generally accepted that neoteny is a "backward" step in evolution, because the Axolotl is descended from what were once terrestrial salamanders, like the closely related species, the Tiger Salamander , _Ambystoma tigrinum_ and _Ambystoma mavortium_ spp. (in fact, one likely theory suggests that the Axolotl is in fact a Tiger salamander off-shoot, as it can interbreed with that species with some success). Through some quirk of nature, a neotenous form developed and, probably due to environmental conditions, prospered. Neoteny is sometimes found in other amphibians, but tends to be caused by low levels of iodine (an essential element for animals to make thyroxine hormones, necessary for growth and development), or possibly by random genetic mutation. Research has also shown that very low temperatures can suppress the production of these hormones, thus also inducing neoteny. In the Axolotl, neoteny is now totally genetic (click for more information on the Axolotl's genetics ). When treated with hormones, the axolotl will usually begin to metamorphose, but in very rare cases it will metamorphose spontaneously, such as the metamorphosed wild type axolotl pictured here. The metamorphosed wild type axolotl bears a close resemblance to the Mexican race of the Tiger Salamander , _Ambystoma velasci_. There is a wonderful thread on the Caudata.org forum hereabout the
metamorphosed axolotl in the photo. Unless cited in the Acknowledgements , all text and images are ©1998-2019 John P. Clare. All Rights Reserved. The use of any site content without written agreement with the copyright holder is prohibited by International Copyright Law. BOOKMARK AXOLOTL.ORG WITH:WHAT ARE THESE?
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