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| {{Short description|Species of amphibian}} | |||
| {{Speciesbox | {{Speciesbox | ||
| | name = Iberian ribbed newt | | name = Iberian ribbed newt | ||
| | image = Pleorodeles_waltl_crop.jpg | | image = Pleorodeles_waltl_crop.jpg | ||
| | image_caption = ''Pleurodeles waltl'' in an aquarium |
| image_caption = ''Pleurodeles waltl'' in an aquarium | ||
| | status = |
| status = LC | ||
| | status_system = IUCN3.1 | | status_system = IUCN3.1 | ||
| | status_ref = <ref name="IUCN">{{cite iucn |author=IUCN SSC Amphibian Specialist Group |date=2023 |title=''Pleurodeles waltl. The IUCN Red List of Threatened Species'' |volume=2023|page=e.T59463A89708437 |doi=10.2305/IUCN.UK.2023-1.RLTS.T59463A89708437.en |access-date=18 March 2024}}</ref> | |||
| | status_ref = <ref name=IUCN>{{cite iucn| url = https://www.iucnredlist.org/details/59463/0| title = ''Pleurodeles waltl''| author = Pedro Beja| author2 = Jaime Bosch| author3 = Miguel Tejedo| author4 = Paul Edgar| author5 = David Donaire-Barroso| author6 = Miguel Lizana| author7 = Iñigo Martínez-Solano| author8 = Alfredo Salvador| author9 = Mario García-París| author10 = Ernesto Recuero Gil| display-authors = etal| year = 2004| access-date = 11 March 2015|ref=harv}}</ref> | |||
| | genus = Pleurodeles | | genus = Pleurodeles | ||
| | species = waltl | | species = waltl | ||
| Line 14: | Line 15: | ||
| }} | }} | ||
| The '''Iberian ribbed newt''', '''gallipato''' or '''Spanish ribbed newt''' (''Pleurodeles waltl'') is a ] endemic to the central and southern ] and ].<ref name=frost>{{cite web |url=http://research.amnh.org/vz/herpetology/amphibia/Amphibia/Caudata/Salamandridae/Pleurodelinae/Pleurodeles/Pleurodeles-waltl |title=''Pleurodeles waltl'' Michahelles, 1830 |author=Frost, Darrel R. |year=2014 |work=Amphibian Species of the World: an Online Reference. Version 6.0 |publisher=American Museum of Natural History | |
The '''Iberian ribbed newt''', '''gallipato''' or '''Spanish ribbed newt''' ('''''Pleurodeles waltl''''') is a ] endemic to the central and southern ] and ].<ref name=frost>{{cite web |url=http://research.amnh.org/vz/herpetology/amphibia/Amphibia/Caudata/Salamandridae/Pleurodelinae/Pleurodeles/Pleurodeles-waltl |title=''Pleurodeles waltl'' Michahelles, 1830 |author=Frost, Darrel R. |year=2014 |work=Amphibian Species of the World: an Online Reference. Version 6.0 |publisher=American Museum of Natural History |access-date=11 March 2015}}</ref> It is the largest European newt species and it is also known for its sharp ribs which can puncture through its sides, and as such is also called the '''sharp-ribbed newt'''. | ||
| This species should not be confused with the different species with similar common name, the Iberian newt ('']''). | This species should not be confused with the different species with similar common name, the Iberian newt ('']''). | ||
| Line 23: | Line 24: | ||
| In the wild, this amphibian grows up to {{convert|30|cm|in|abbr=on}}, but rarely more than {{convert|20|cm|in|abbr=on}} in captivity. Its color is dark gray dorsally, and lighter gray on its ventral side, with rust-colored small spots where its ribs can protrude. This newt has a flat, spade-shaped head and a long tail, which is about half its body length. Males are more slender and usually smaller than females. The larvae have bushy external gills and usually paler color patterns than the adults. | In the wild, this amphibian grows up to {{convert|30|cm|in|abbr=on}}, but rarely more than {{convert|20|cm|in|abbr=on}} in captivity. Its color is dark gray dorsally, and lighter gray on its ventral side, with rust-colored small spots where its ribs can protrude. This newt has a flat, spade-shaped head and a long tail, which is about half its body length. Males are more slender and usually smaller than females. The larvae have bushy external gills and usually paler color patterns than the adults. | ||
| ''Pleurodeles waltl'' is more aquatic-dwelling than many other European tailed amphibians. Though they are quite able to walk on land, most rarely leave the water, living usually in ponds, cisterns, and ancient village wells that were common in ] and ] in the past. They prefer cool, quiet, and deep waters, where they feed on insects, worms, and tadpoles. | ''Pleurodeles waltl'' is more aquatic-dwelling than many other European tailed amphibians. Though they are quite able to walk on land, most rarely leave the water, living usually in ponds, cisterns, and ancient village wells that were common in ] and ] in the past. They prefer cool, quiet, and deep waters, where they feed on insects, aquatic molluscs,<ref>{{cite web | url=https://amphibiaweb.org/cgi/amphib_query?where-genus=Pleurodeles&where-species=waltl | title=AmphibiaWeb - Pleurodeles waltl }}</ref> worms, and tadpoles. | ||
| ==Sex determination== | ==Sex determination== | ||
| Sex determination is regulated by ]s, but can be overridden by temperature. Females have both sex chromosomes (Z and W), while males have two copies of the Z chromosome (ZZ). However, when ZW larvae are reared at 32 °C (90 °F) during particular stages of development (stage 42 to stage 54), they differentiate into functional ]s. ] play an important role during the sex determination process, and the newts can be manipulated to change sex by adding hormones or hormone-inhibitors to the water in which they are reared.<ref name=Kuntz/> | Sex determination is regulated by ]s, but can be overridden by temperature. Females have both sex chromosomes (Z and W), while males have two copies of the Z chromosome (ZZ). However, when ZW larvae are reared at 32 °C (90 °F) during particular stages of development (stage 42 to stage 54), they differentiate into functional ]s. ] play an important role during the sex determination process, and the newts can be manipulated to change sex by adding hormones or hormone-inhibitors to the water in which they are reared.<ref name=Kuntz/> | ||
| ], an ]-synthesizing ] which acts as a ] hormone, plays a key role in sex determination in many non-mammalian ]s, including the Iberian ribbed newt.<ref name=Kuntz>{{cite journal |last1=Kuntz |first1=S. |author2=Amand Chesnel |author3=Stéphane Flament |author4=Dominique Chardard |year=2004 |title=Cerebral and gonadal aromatase expressions are differently affected during sex differentiation of ''Pleurodeles waltl'' |journal=Journal of Molecular Endocrinology |volume=33 |issue=3 |pages=717–727 |doi=10.1677/jme.1.01588 | |
], an ]-synthesizing ] which acts as a ] hormone, plays a key role in sex determination in many non-mammalian ]s, including the Iberian ribbed newt.<ref name=Kuntz>{{cite journal |last1=Kuntz |first1=S. |author2=Amand Chesnel |author3=Stéphane Flament |author4=Dominique Chardard |year=2004 |title=Cerebral and gonadal aromatase expressions are differently affected during sex differentiation of ''Pleurodeles waltl'' |journal=Journal of Molecular Endocrinology |volume=33 |issue=3 |pages=717–727 |doi=10.1677/jme.1.01588 |pmid=15591030 |doi-access=free }}</ref> It is found in higher levels in the ]es in ZW larvae than in their ZZ counterparts, although not in heat-treated ZW larvae. The increase occurs near the final stages of which their sex can be determined by temperature (stage 52). | ||
| ==Conservation== | ==Conservation== | ||
| The ] has listed the Iberian ribbed newt as ] since its 2006 ]. It received this listing because its wild populations appear to be in significant decline due to widespread habitat loss and the effects of invasive species, thus making the species close to qualifying for ]. Previously, in 2004, the species had been listed as ], the lowest ranking. This species is generally threatened through loss of aquatic habitats through drainage, ], the impacts of livestock (in ]), ], domestic and ], golf courses, and infrastructure development. It has largely disappeared from coastal areas in Iberia and Morocco close to concentrations of tourism and highly populated areas such as ]'s outskirts. Introduced fish such as the ] and crayfish ('']'') are known to prey on the eggs and larvae of this species, and are implicated in its decline. Mortality on roads has been reported to be a serious threat to some populations.<ref name=IUCN/> | The ] has listed the Iberian ribbed newt as ] since its 2006 ]. It received this listing because its wild populations appear to be in significant decline due to widespread habitat loss and the effects of invasive species, thus making the species close to qualifying for ]. Previously, in 2004, the species had been listed as ], the lowest ranking. This species is generally threatened through loss of aquatic habitats through drainage, ], the impacts of livestock (in ]), ], domestic and ], golf courses, and infrastructure development. It has largely disappeared from coastal areas in Iberia and Morocco close to concentrations of tourism and highly populated areas such as ]'s outskirts. Introduced fish such as the ] and crayfish ('']'') are known to prey on the eggs and larvae of this species, and are implicated in its decline. Mortality on roads has been reported to be a serious threat to some populations.<ref name="IUCN" /> | ||
| ==Space experiments== | ==Space experiments== | ||
| ] spacecraft, similar to the ] shown here, first carried the Iberian ribbed newt into space. The circular viewport seen on this craft was installed for its display in a space museum.]] | ] spacecraft, similar to the ] shown here, first carried the Iberian ribbed newt into space. The circular viewport seen on this craft was installed for its display in a space museum.]] | ||
| ''Pleurodeles waltl'' has been studied in space on at least six missions. The first Iberian ribbed newts |
''Pleurodeles waltl'' has been studied in space on at least six missions. The first Iberian ribbed newts were sent to space in 1985 on board ].<ref>Mitashov, V.; et al. Lens and limb regeneration in newt during and after 13-day long spaceflight {{Dead link|date=April 2022|bot=InternetArchiveBot|fix-attempted=yes}}</ref> The ten newts shared their journey with two ]s and ten rats, in an otherwise crewless ] ]. In 1992, ]<ref>{{cite book |author=Grinfeld, S. |display-authors=etal |chapter=Tissue regeneration in space (spinal cord, muscle and bone) in the amphibian ''Pleurodeles waltl'' |title=Life Sciences Research in Space, Proceedings of the Fifth European Symposium held 26 September–1 October, 1993 in Arcachon, France. ESA SP-366 |volume=366 |editor1=H. Oser |editor2=T.D. Guyenne |year=1994 |page=181 |bibcode=1994ESASP.366..181G}}</ref><ref>{{cite book |author=Dournon, C. |display-authors=etal |chapter=Experience Triton on BION-10: Study of peptidase-1 expression in embarked ''Pleurodeles'' females and detection of genetic abnormalities in their progeny |title=Life Sciences Research in Space, Proceedings of the Fifth European Symposium held 26 September–1 October, 1993 in Arcachon, France. ESA SP-366 |volume=366 |editor1=H. Oser |editor2=T.D. Guyenne |year=1994 |page=171 |bibcode=1994ESASP.366..171D}}</ref> also carried the newts on board, as did ]<ref name="Grigoryan et al. 2002"/> in 1996. | ||
| ''Pleurodeles waltl'' research was continued later in 1996 by French-led experiments on the ] (Mir Cassiopée expedition<ref name="Dournon et al. 2001"/>), with follow-up studies in 1998 (Mir Pégase expedition) and 1999 (Mir Perseus expedition). ]<ref>Domaratskaya ''et al.'', Studies on hemopoietic tissue of ribbed newt, ''Pleurodeles waltl'', after the flight on board Russian satellite "Foton-M2" in 2005 </ref> also carried the Iberian ribbed newt in 2005. | ''Pleurodeles waltl'' research was continued later in 1996 by French-led experiments on the ] (Mir Cassiopée expedition<ref name="Dournon et al. 2001"/>), with follow-up studies in 1998 (Mir Pégase expedition) and 1999 (Mir Perseus expedition). ]<ref>Domaratskaya ''et al.'', Studies on hemopoietic tissue of ribbed newt, ''Pleurodeles waltl'', after the flight on board Russian satellite "Foton-M2" in 2005 </ref> also carried the Iberian ribbed newt in 2005. | ||
| ] | ] | ||
| The newts were chosen because they are a good ] for the study of ].<ref>{{cite journal|last1=Gualandris-Parisot|first1=L.|last2=Husson|first2=D.|last3=Foulquier|first3=F.|last4=Kan|first4=P.|last5=Davet|first5=J.|last6=Aimar|first6=C.|last7=Dournon|first7=C.|last8=Duprat|first8=A.M. |year=2001 |title=''Pleurodeles waltl'', amphibian, Urodele, is a suitable biological model for embryological and physiological space experiments on a vertebrate|journal=Advances in Space Research |volume=28 |issue=4 |pages=569–578 |doi=10.1016/S0273-1177(01)00384-2|bibcode=2001AdSpR..28..569G}}</ref> They are a good model organism because of the female's ability to retain live sperm in her ] for up to five months, allowing her to be inseminated on Earth, and later (in space) have fertilisation induced through hormonal stimulation. Another advantage to this species is their development is slow, so all the key stages of ] can be observed, from the ] to swimming tailbud embryos or larvae. | The newts were chosen because they are a good ] for the study of ].<ref>{{cite journal|last1=Gualandris-Parisot|first1=L.|last2=Husson|first2=D.|last3=Foulquier|first3=F.|last4=Kan|first4=P.|last5=Davet|first5=J.|last6=Aimar|first6=C.|last7=Dournon|first7=C.|last8=Duprat|first8=A.M. |year=2001 |title=''Pleurodeles waltl'', amphibian, Urodele, is a suitable biological model for embryological and physiological space experiments on a vertebrate|journal=Advances in Space Research |volume=28 |issue=4 |pages=569–578 |doi=10.1016/S0273-1177(01)00384-2|pmid=11799990|bibcode=2001AdSpR..28..569G}}</ref> They are a good model organism because of the female's ability to retain live sperm in her ] for up to five months, allowing her to be inseminated on Earth, and later (in space) have fertilisation induced through hormonal stimulation. Another advantage to this species is their development is slow, so all the key stages of ] can be observed, from the ] to swimming tailbud embryos or larvae. | ||
| Studies looked at the newts' ability to regenerate (which was faster in space overall, and up to two times as fast in early stages<ref name="Grigoryan et al. 2002">{{cite journal|last1=Grigoryan|first1=E.N.|last2=Mitashov|first2=V.I.|last3=Anton|first3=H.J. |year=2002 |title=Urodelean amphibians in studies on microgravity: effects upon organ and tissue regeneration |journal=Advances in Space Research |volume=30 |issue=4 |pages=757–764 |doi=10.1016/S0273-1177(02)00392-7 |pmid=12528722|bibcode=2002AdSpR..30..757G}}</ref>) as well as the stages of development and reproduction in space.<ref>Dournon C & Houillon C 1985 Thermosensibilité de la différenciation sexuelle chez l’Amphibien Urodè le, ''Pleurodeles waltlii'' Michah. Conditions pour obtenir l’inversion du phénotype sexuel de toutes les femelles génétiques sous l’action de la température d’élevage. ''Reproduction Nutrition Développement'' '''25''' 671–688.</ref> | Studies looked at the newts' ability to regenerate (which was faster in space overall, and up to two times as fast in early stages<ref name="Grigoryan et al. 2002">{{cite journal|last1=Grigoryan|first1=E.N.|last2=Mitashov|first2=V.I.|last3=Anton|first3=H.J. |year=2002 |title=Urodelean amphibians in studies on microgravity: effects upon organ and tissue regeneration |journal=Advances in Space Research |volume=30 |issue=4 |pages=757–764 |doi=10.1016/S0273-1177(02)00392-7 |pmid=12528722|bibcode=2002AdSpR..30..757G}}</ref>) as well as the stages of development and reproduction in space.<ref>Dournon C & Houillon C 1985 Thermosensibilité de la différenciation sexuelle chez l’Amphibien Urodè le, ''Pleurodeles waltlii'' Michah. Conditions pour obtenir l’inversion du phénotype sexuel de toutes les femelles génétiques sous l’action de la température d’élevage. ''Reproduction Nutrition Développement'' '''25''' 671–688.</ref> | ||
| On the ground, studies of ] (up to 3]) on ''P. waltl'' fertilisation have also been conducted,<ref>{{cite journal |vauthors=Aimar C, etal |year=2000 |title=Microgravity and hypergravity effects on fertilization of the salamander ''Pleurodeles waltl'' (urodele amphibian) |journal=Biology of Reproduction |volume=63 |issue=2 |pages=551–558 |doi=10.1095/biolreprod63.2.551 |doi-access=free }}</ref> as well as on the fertility of the space-born newts once they arrived back on Earth (they were fertile, and without problems).<ref name="Dournon et al. 2001">{{cite journal |last1=Dournon|first1=C. |last2=Durand|first2=D. |last3=Tankosic|first3=C. |last4=Membre|first4=H. |last5=Gualandris-Parisot|first5=L. |last6=Bautz|first6=A. |year=2001 |title=Effects of microgravity on the larval development, metamorphosis and reproduction of the urodele amphibian ''Pleurodeles waltl'' |journal=Development, Growth & Differentiation |volume=43 |issue=3 |pages=315–326 |doi=10.1046/j.1440-169x.2001.00575.x }}</ref> | On the ground, studies of ] (up to 3]) on ''P. waltl'' fertilisation have also been conducted,<ref>{{cite journal |vauthors=Aimar C, etal |year=2000 |title=Microgravity and hypergravity effects on fertilization of the salamander ''Pleurodeles waltl'' (urodele amphibian) |journal=Biology of Reproduction |volume=63 |issue=2 |pages=551–558 |doi=10.1095/biolreprod63.2.551 |pmid=10906064 |doi-access=free }}</ref> as well as on the fertility of the space-born newts once they arrived back on Earth (they were fertile, and without problems).<ref name="Dournon et al. 2001">{{cite journal |last1=Dournon|first1=C. |last2=Durand|first2=D. |last3=Tankosic|first3=C. |last4=Membre|first4=H. |last5=Gualandris-Parisot|first5=L. |last6=Bautz|first6=A. |year=2001 |title=Effects of microgravity on the larval development, metamorphosis and reproduction of the urodele amphibian ''Pleurodeles waltl'' |journal=Development, Growth & Differentiation |volume=43 |issue=3 |pages=315–326 |doi=10.1046/j.1440-169x.2001.00575.x |pmid=11422297 |s2cid=23149867 |doi-access=free }}</ref> | ||
| Similar microgravity experiments have also been conducted for other species, namely the frog species '']'', and no effects on long term health are similarly observed. | |||
| == Regeneration == | == Regeneration == | ||
| ''Pleurodeles waltl'' is a model system for the study of adult ]. Similar to other salamanders, ''P. |
''Pleurodeles waltl'' is a model system for the study of adult ]. Similar to other salamanders, ''P. waltl'' are animals that can regenerate lost limbs, injured heart tissue, lesioned brain cells in addition to other body parts such as the eye lens and the spinal cord. The 20 Gb genome of ''P. waltl'' has been sequenced to facilitate research into the genetic basis of this extraordinary regenerative ability.<ref>{{Cite journal|last1=Elewa|first1=Ahmed|last2=Wang|first2=Heng|last3=Talavera-López|first3=Carlos|last4=Joven|first4=Alberto|last5=Brito|first5=Gonçalo|last6=Kumar|first6=Anoop|last7=Hameed|first7=L. Shahul|last8=Penrad-Mobayed|first8=May|last9=Yao|first9=Zeyu|date=2017-12-22|title=Reading and editing the Pleurodeles waltl genome reveals novel features of tetrapod regeneration|journal=Nature Communications|language=En|volume=8|issue=1|pages=2286|doi=10.1038/s41467-017-01964-9|pmid=29273779|pmc=5741667|issn=2041-1723|bibcode=2017NatCo...8.2286E}}</ref> | ||
| ==See also== | ==See also== | ||
| Line 60: | Line 63: | ||
| {{Commons category|Pleurodeles waltl}} | {{Commons category|Pleurodeles waltl}} | ||
| *, BioFresh Cabinet of Freshwater Curiosities. | *, BioFresh Cabinet of Freshwater Curiosities. | ||
| * | * | ||
| * | * | ||
| *, BBC Earth News. | *, BBC Earth News. | ||
Latest revision as of 06:39, 22 June 2024
Species of amphibian
| Iberian ribbed newt | |
|---|---|
| |
| Pleurodeles waltl in an aquarium | |
| Conservation status | |
 Least Concern (IUCN 3.1) | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Amphibia |
| Order: | Urodela |
| Family: | Salamandridae |
| Genus: | Pleurodeles |
| Species: | P. waltl |
| Binomial name | |
| Pleurodeles waltl Michahelles, 1830 | |
| |
| Distribution in the Iberian peninsula and the Maghreb | |
| Synonyms | |
|
Pleurodeles waltlii (incorrect spelling) | |
The Iberian ribbed newt, gallipato or Spanish ribbed newt (Pleurodeles waltl) is a newt endemic to the central and southern Iberian Peninsula and Morocco. It is the largest European newt species and it is also known for its sharp ribs which can puncture through its sides, and as such is also called the sharp-ribbed newt.
This species should not be confused with the different species with similar common name, the Iberian newt (Lissotriton boscai).
Description
The Iberian ribbed newt has tubercles running down each side. Through these, its sharp ribs can puncture. The ribs act as a defense mechanism, causing little harm to the newt. This mechanism could be considered as a primitive and rudimentary system of envenomation, but is completely harmless to humans. At the same time as pushing its ribs out the newt begins to secrete poison from special glands on its body. The poison coated ribs create a highly effective stinging mechanism, injecting toxins through the thin skin in predator's mouths. The newt's effective immune system and collagen coated ribs mean the pierced skin quickly regrows without infection.
In the wild, this amphibian grows up to 30 cm (12 in), but rarely more than 20 cm (7.9 in) in captivity. Its color is dark gray dorsally, and lighter gray on its ventral side, with rust-colored small spots where its ribs can protrude. This newt has a flat, spade-shaped head and a long tail, which is about half its body length. Males are more slender and usually smaller than females. The larvae have bushy external gills and usually paler color patterns than the adults.
Pleurodeles waltl is more aquatic-dwelling than many other European tailed amphibians. Though they are quite able to walk on land, most rarely leave the water, living usually in ponds, cisterns, and ancient village wells that were common in Portugal and Spain in the past. They prefer cool, quiet, and deep waters, where they feed on insects, aquatic molluscs, worms, and tadpoles.
Sex determination
Sex determination is regulated by sex chromosomes, but can be overridden by temperature. Females have both sex chromosomes (Z and W), while males have two copies of the Z chromosome (ZZ). However, when ZW larvae are reared at 32 °C (90 °F) during particular stages of development (stage 42 to stage 54), they differentiate into functional neomales. Hormones play an important role during the sex determination process, and the newts can be manipulated to change sex by adding hormones or hormone-inhibitors to the water in which they are reared.
Aromatase, an estrogen-synthesizing enzyme which acts as a steroid hormone, plays a key role in sex determination in many non-mammalian vertebrates, including the Iberian ribbed newt. It is found in higher levels in the gonad–mesonephros complexes in ZW larvae than in their ZZ counterparts, although not in heat-treated ZW larvae. The increase occurs near the final stages of which their sex can be determined by temperature (stage 52).
Conservation
The IUCN has listed the Iberian ribbed newt as Near Threatened since its 2006 Red List. It received this listing because its wild populations appear to be in significant decline due to widespread habitat loss and the effects of invasive species, thus making the species close to qualifying for Vulnerable. Previously, in 2004, the species had been listed as Least Concern, the lowest ranking. This species is generally threatened through loss of aquatic habitats through drainage, agrochemical pollution, the impacts of livestock (in North African dayas), eutrophication, domestic and industrial contamination, golf courses, and infrastructure development. It has largely disappeared from coastal areas in Iberia and Morocco close to concentrations of tourism and highly populated areas such as Madrid's outskirts. Introduced fish such as the largemouth bass and crayfish (Procambarus clarkii) are known to prey on the eggs and larvae of this species, and are implicated in its decline. Mortality on roads has been reported to be a serious threat to some populations.
Space experiments
Pleurodeles waltl has been studied in space on at least six missions. The first Iberian ribbed newts were sent to space in 1985 on board Bion 7. The ten newts shared their journey with two rhesus macaques and ten rats, in an otherwise crewless Soviet Kosmos satellite. In 1992, Bion 10 also carried the newts on board, as did Bion 11 in 1996.
Pleurodeles waltl research was continued later in 1996 by French-led experiments on the Mir space station (Mir Cassiopée expedition), with follow-up studies in 1998 (Mir Pégase expedition) and 1999 (Mir Perseus expedition). Foton-M2 also carried the Iberian ribbed newt in 2005.
The newts were chosen because they are a good model organism for the study of microgravity. They are a good model organism because of the female's ability to retain live sperm in her cloaca for up to five months, allowing her to be inseminated on Earth, and later (in space) have fertilisation induced through hormonal stimulation. Another advantage to this species is their development is slow, so all the key stages of ontogenesis can be observed, from the oocyte to swimming tailbud embryos or larvae.
Studies looked at the newts' ability to regenerate (which was faster in space overall, and up to two times as fast in early stages) as well as the stages of development and reproduction in space.
On the ground, studies of hypergravity (up to 3g) on P. waltl fertilisation have also been conducted, as well as on the fertility of the space-born newts once they arrived back on Earth (they were fertile, and without problems).
Similar microgravity experiments have also been conducted for other species, namely the frog species Hyla japonica, and no effects on long term health are similarly observed.
Regeneration
Pleurodeles waltl is a model system for the study of adult regeneration. Similar to other salamanders, P. waltl are animals that can regenerate lost limbs, injured heart tissue, lesioned brain cells in addition to other body parts such as the eye lens and the spinal cord. The 20 Gb genome of P. waltl has been sequenced to facilitate research into the genetic basis of this extraordinary regenerative ability.
See also
References
- ^ IUCN SSC Amphibian Specialist Group (2023). "Pleurodeles waltl. The IUCN Red List of Threatened Species". IUCN Red List of Threatened Species. 2023: e.T59463A89708437. doi:10.2305/IUCN.UK.2023-1.RLTS.T59463A89708437.en. Retrieved 18 March 2024.
- Frost, Darrel R. (2014). "Pleurodeles waltl Michahelles, 1830". Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. Retrieved 11 March 2015.
- Bruna Azara, C. (1995). "Vertebrados terrestres venenosos peligrosos para el ser humano en España" (PDF). Boletín de la Sociedad Entomológica Aragonesa (S.E.A.). 11: 32–40.
- http://cabinetoffreshwatercuriosities.com/2010/11/11/spanish-ribbed-newt/ Archived 2013-10-03 at the Wayback Machine Spanish ribbed newt - Pleurodeles waltl, The BioFresh Cabinet of Freshwater Curiosities
- "AmphibiaWeb - Pleurodeles waltl".
- ^ Kuntz, S.; Amand Chesnel; Stéphane Flament; Dominique Chardard (2004). "Cerebral and gonadal aromatase expressions are differently affected during sex differentiation of Pleurodeles waltl". Journal of Molecular Endocrinology. 33 (3): 717–727. doi:10.1677/jme.1.01588. PMID 15591030.
- Mitashov, V.; et al. Lens and limb regeneration in newt during and after 13-day long spaceflight
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- Domaratskaya et al., Studies on hemopoietic tissue of ribbed newt, Pleurodeles waltl, after the flight on board Russian satellite "Foton-M2" in 2005
- Gualandris-Parisot, L.; Husson, D.; Foulquier, F.; Kan, P.; Davet, J.; Aimar, C.; Dournon, C.; Duprat, A.M. (2001). "Pleurodeles waltl, amphibian, Urodele, is a suitable biological model for embryological and physiological space experiments on a vertebrate". Advances in Space Research. 28 (4): 569–578. Bibcode:2001AdSpR..28..569G. doi:10.1016/S0273-1177(01)00384-2. PMID 11799990.
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- Elewa, Ahmed; Wang, Heng; Talavera-López, Carlos; Joven, Alberto; Brito, Gonçalo; Kumar, Anoop; Hameed, L. Shahul; Penrad-Mobayed, May; Yao, Zeyu (2017-12-22). "Reading and editing the Pleurodeles waltl genome reveals novel features of tetrapod regeneration". Nature Communications. 8 (1): 2286. Bibcode:2017NatCo...8.2286E. doi:10.1038/s41467-017-01964-9. ISSN 2041-1723. PMC 5741667. PMID 29273779.
External links
- Spanish ribbed newt - Pleurodeles waltl, BioFresh Cabinet of Freshwater Curiosities.
- Caudata Culture: Pleurodeles waltl
- Livingworld.org: Pleurodeles waltl
- Bizarre newt uses ribs as weapons, BBC Earth News.