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  • Notes on reproduction of the adorned graceful brown snake, Rhadinea decorata (Serpentes, Colubridae), from Costa Rica - Ratsnake Information
    2 July 2 August 2 September 2 October 1 The smallest spermiogenic male measured 120 mm SVL LACM 131127 Females were larger than males unpaired t test 18 df t 3 07 P 0 007 Three females with oviductal eggs were observed one 1 egg collected in January LACM 154320 one 2 eggs collected 19 July 2 August LACM 154313 and one 3 eggs collected in August LACM 154317 The smallest reproductively active R decorata female 1 oviductal egg measured 203 mm SVL LACM 154320 Three females were undergoing yolk deposition secondary vitellogenesis one each from July August and December One female SVL 202 mm from February was reproductively inactive no yolk deposition Most of the females 86 7 were reproductively active There was no evidence that R decorata from Costa Rica produce more than one clutch of eggs per year oviductal eggs and yolk deposition in the same female although the existence of reproductively active females in different parts of the year January July August December suggests that this might be possible Solórzano 2004 previously reported clutches of up to four eggs for R decorata but did not give a mean clutch size Two presumably neonates of R decorata were collected one each in September and November Results obtained in the present study suggest that R decorata males produce sperm throughout the year Extended testicular cycles have also been reported in other snakes from Costa Rica Drymobius margaritiferus Goldberg 2003a Dendrophidion sp Goldberg 2003b Ninia maculata Goldberg 2004a Erythrolamprus bizona and E mimus Goldberg 2004b Micrurus nigrocinctus Goldberg 2004c Hydromorphus concolor Goldberg 2006a Mastigodryas melanolomus Goldberg 2006b and Geophis godmani Goldberg 2007 Whether this is typical of snakes from Costa Rica must await histological examination of testes from additional species of Costa Rican snakes The preceding observations on the reproductive cycle of males and females indicates that R decorata has a prolonged reproductive cycle in Costa Rica in which both sexes are in reproductive condition at least through most of the year This fits into the polyestrous with continuous reproduction of Saint Girons 1982 Fitch 1982 reported year round breeding in snakes from some aseasonal equatorial regions Zug et al 1979 reported continuous or aseasonal reproduction for the colubrid snakes Dipsas catesbyi in Peru and Imantodes cenchoa from Peru Ecuador In contrast the congener Rhadinea flavilata which occurs in the southeastern United States follows a seasonal reproductive cycle in which breeding occurs in the spring and eggs are laid from late May to mid August Ernst and Ernst 2004 The timing of this reproductive cycle is similar to those of other colubrid snakes from north temperate areas of North America e g Goldberg and Parker 1975 and fits into the aestival spermatogenesis of Saint Girons 1982 Subsequent investigations are needed to ascertain how widespread extended reproductive cycles are in the snakes of Costa Rica Acknowledgements I thank Christine Thacker LACM for permission to examine specimens Jessica Carlson assisted with histology Snakes are part of the CRE collection donated to

    Original URL path: http://www.ratsnakefoundation.org/index.php/article-base/general-ratsnake-info/22-members/other-colubrids/251-notes-on-reproduction-of-the-adorned-graceful-brown-snake-rhadinea-decorata-serpentes-colubridae-from-costa-rica (2016-02-01)
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  • Photo Gallery - Category: Euprepiophis mandarinus - Ratsnake Information
    on site There are over 100 articles on Ratsnakes in the article database covering topics such as feeding breeding natural history We have an extensive glossary of herpetological terms The photo gallery has nearly 1500 photos of Ratsnakes organized by species We have morph guides for Orthriophis taeniurus taeniurus Elaphe dione plus other species of Ratsnake You are here Home Photo Gallery ASIAN RATSNAKES Euprepiophis mandarinus Euprepiophis mandarinus Albino Author Reptilian Classified Axanthic White Author Lilian Moissonnier Axanthic White Author Lilian Moissonnier Axanthic White Author Lilian Moissonnier Axanthic Vietnamese Author Rhiannon Steere Axanthic Vietnamese Author Rhiannon Steere China Author Lilian Moissonnier China Author Lilian Moissonnier Hong Valley Sapa Rainer Fesser Line Author Jesper Lund Hong Valley Sapa Rainer Fesser Line Author Jesper Lund Hong Valley Sapa Rainer Fesser Line Author Jesper Lund Hong Valley sapa Vietnam Stefan Moeller Line Author Jesper Lund Hong Valley sapa Vietnam Stefan Moeller Line Author Jesper Lund Hong Valley sapa Vietnam Stefan Moeller Line Author Jesper Lund Hong Valley sapa Vietnam Stefan Moeller Line Author Jesper Lund Hong Valley sapa Vietnam Stefan Moeller Line Author Jesper Lund Hong Valley Vietnam Author Lilian Moissonnier Hunan China Rainer Fesser Line Author Jesper Lund Hunan China Rainer Fesser Line Author Jesper Lund Mandarin Ratsnake Author Rob Kool Mandarin Ratsnake Author Rob Kool Mandarin Ratsnake Author Rob Kool Mandarin Ratsnake Author Rob Kool Mandarin Ratsnake Author Roger Butler Mandarin Ratsnake Author Roger Butler Mandarin Ratsnake Author Roger Butler Mandarin Ratsnake Author Roger Butler Mandarin Ratsnake Author Roger Butler Mandarin Ratsnake Author Roger Butler Mandarin Ratsnake Author Roger Butler Mandarin Ratsnake Author Roger Butler Mandarin Ratsnake Author Rhiannon Steere Mandarin Ratsnake Author Dirk Warnecke Mandarin Ratsnake Author Rex Knight Red Phase Author Matthew Most Sichuan Locality Author Sue Knight Sichuan Locality Author Sue Knight Sichuan Locality Author Sue Knight Sichuan

    Original URL path: http://www.ratsnakefoundation.org/index.php/photo-gallery/asian-ratsnakes/euprepiophis-mandarinus (2016-02-01)
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  • Allometry - Glossary of Herpetological Terms - Ratsnake Information
    friesi O p coxi C helena E bimaculata Wild Locality Guides Back N American Ratsnakes Morph Guides Back American Back Pantherophis o obsoletus Cornsnakes Asian Back Elaphe dione Orthriophis t taeniurus CB Locality Ratsnakes Back Elaphe dione Photo Gallery Links Directory Contact Us 1 Did You Know The Ratsnake Information website has over 80 Ratsnake species subspecies profiles on site There are over 100 articles on Ratsnakes in the article database covering topics such as feeding breeding natural history We have an extensive glossary of herpetological terms The photo gallery has nearly 1500 photos of Ratsnakes organized by species We have morph guides for Orthriophis taeniurus taeniurus Elaphe dione plus other species of Ratsnake Allometry Search for glossary terms regular expression allowed Begin with Contains Exact term Sounds like All 0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Term Definition Allometry Allometry the study of different growth rates proportions on and in the body All 0 1 2 3 4 5 6 7 8 9 A B C D E F G

    Original URL path: http://www.ratsnakefoundation.org/index.php/glossary-of-herpetological-terms/416-allometry (2016-02-01)
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  • Allopatric - Glossary of Herpetological Terms - Ratsnake Information
    Back N American Ratsnakes Morph Guides Back American Back Pantherophis o obsoletus Cornsnakes Asian Back Elaphe dione Orthriophis t taeniurus CB Locality Ratsnakes Back Elaphe dione Photo Gallery Links Directory Contact Us 1 Did You Know The Ratsnake Information website has over 80 Ratsnake species subspecies profiles on site There are over 100 articles on Ratsnakes in the article database covering topics such as feeding breeding natural history We have an extensive glossary of herpetological terms The photo gallery has nearly 1500 photos of Ratsnakes organized by species We have morph guides for Orthriophis taeniurus taeniurus Elaphe dione plus other species of Ratsnake Allopatric Search for glossary terms regular expression allowed Begin with Contains Exact term Sounds like All 0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Term Definition Allopatric Allopatric speciation is a term used to describe species that are geographically separated and evolve to an extent whereby they do not readily breed with each other even if a geographical barrier no longer exists All 0 1 2 3 4 5

    Original URL path: http://www.ratsnakefoundation.org/index.php/glossary-of-herpetological-terms/28-allopatric (2016-02-01)
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  • Background Extinction - Glossary of Herpetological Terms - Ratsnake Information
    Back N American Ratsnakes Morph Guides Back American Back Pantherophis o obsoletus Cornsnakes Asian Back Elaphe dione Orthriophis t taeniurus CB Locality Ratsnakes Back Elaphe dione Photo Gallery Links Directory Contact Us 1 Did You Know The Ratsnake Information website has over 80 Ratsnake species subspecies profiles on site There are over 100 articles on Ratsnakes in the article database covering topics such as feeding breeding natural history We have an extensive glossary of herpetological terms The photo gallery has nearly 1500 photos of Ratsnakes organized by species We have morph guides for Orthriophis taeniurus taeniurus Elaphe dione plus other species of Ratsnake Background Extinction Search for glossary terms regular expression allowed Begin with Contains Exact term Sounds like All 0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Term Definition Background Extinction Over time throughout history during different environmental conditions some species historically become extinct more so than those that survive Background extinction describes this phenomenon where it isn t attributable to a specific environmental event All 0 1 2 3 4

    Original URL path: http://www.ratsnakefoundation.org/index.php/glossary-of-herpetological-terms/444-background-extinction (2016-02-01)
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  • Baldwin Effect - Glossary of Herpetological Terms - Ratsnake Information
    O p coxi C helena E bimaculata Wild Locality Guides Back N American Ratsnakes Morph Guides Back American Back Pantherophis o obsoletus Cornsnakes Asian Back Elaphe dione Orthriophis t taeniurus CB Locality Ratsnakes Back Elaphe dione Photo Gallery Links Directory Contact Us 1 Did You Know The Ratsnake Information website has over 80 Ratsnake species subspecies profiles on site There are over 100 articles on Ratsnakes in the article database covering topics such as feeding breeding natural history We have an extensive glossary of herpetological terms The photo gallery has nearly 1500 photos of Ratsnakes organized by species We have morph guides for Orthriophis taeniurus taeniurus Elaphe dione plus other species of Ratsnake Baldwin Effect Search for glossary terms regular expression allowed Begin with Contains Exact term Sounds like All 0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Term Definition Baldwin Effect A specific phenotype that is re enforced by the selection genes within a population All 0 1 2 3 4 5 6 7 8 9 A B C D E

    Original URL path: http://www.ratsnakefoundation.org/index.php/glossary-of-herpetological-terms/445-baldwin-effect (2016-02-01)
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  • Bauplan - Glossary of Herpetological Terms - Ratsnake Information
    O p coxi C helena E bimaculata Wild Locality Guides Back N American Ratsnakes Morph Guides Back American Back Pantherophis o obsoletus Cornsnakes Asian Back Elaphe dione Orthriophis t taeniurus CB Locality Ratsnakes Back Elaphe dione Photo Gallery Links Directory Contact Us 1 Did You Know The Ratsnake Information website has over 80 Ratsnake species subspecies profiles on site There are over 100 articles on Ratsnakes in the article database covering topics such as feeding breeding natural history We have an extensive glossary of herpetological terms The photo gallery has nearly 1500 photos of Ratsnakes organized by species We have morph guides for Orthriophis taeniurus taeniurus Elaphe dione plus other species of Ratsnake Bauplan Search for glossary terms regular expression allowed Begin with Contains Exact term Sounds like All 0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Term Definition Bauplan The body plan that may be similar between many species or typical within a genera All 0 1 2 3 4 5 6 7 8 9 A B C D E F

    Original URL path: http://www.ratsnakefoundation.org/index.php/glossary-of-herpetological-terms/446-bauplan (2016-02-01)
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  • Baytril - Glossary of Herpetological Terms - Ratsnake Information
    C helena E bimaculata Wild Locality Guides Back N American Ratsnakes Morph Guides Back American Back Pantherophis o obsoletus Cornsnakes Asian Back Elaphe dione Orthriophis t taeniurus CB Locality Ratsnakes Back Elaphe dione Photo Gallery Links Directory Contact Us 1 Did You Know The Ratsnake Information website has over 80 Ratsnake species subspecies profiles on site There are over 100 articles on Ratsnakes in the article database covering topics such as feeding breeding natural history We have an extensive glossary of herpetological terms The photo gallery has nearly 1500 photos of Ratsnakes organized by species We have morph guides for Orthriophis taeniurus taeniurus Elaphe dione plus other species of Ratsnake Baytril Search for glossary terms regular expression allowed Begin with Contains Exact term Sounds like All 0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Term Definition Baytril Brand name of enroflaxacin A member of the fluoroquinolone class of antibiotics A broad spectum antibiotic active against many bacterial types All 0 1 2 3 4 5 6 7 8 9 A B C

    Original URL path: http://www.ratsnakefoundation.org/index.php/glossary-of-herpetological-terms/288-baytril (2016-02-01)
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