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Thread: Measurements on Near Term Corucia Fetus

  1. #1 Measurements on Near Term Corucia Fetus 
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    LEEWAY CORUCIA RESEARCH CENTER (LCRC)

    Courtesy of Polyphemos


    MEASUREMENTS ON NEAR TERM CORUCIA FETUS



    Brian L. Schnirel and Sherri Lee Jones
    Leeway Corucia Research Center (LCRC)
    Blenheim, South Carolina, 29516


    Abstract:


    Measurements on a stillborn Corucia fetus (Common Solomon

    Monkey Skink - Corucia zebrata zebrata (underlined) were

    undertaken to gain a perspective of development of this unique

    and endangered Scincidae species.


    Introduction:

    Corucia zebrata (underlined), a large herbivorous

    Scincidid lizard capable of viviparous matrotrophy, occasionally

    produces miscarrages. The reason for these miscarrages could be

    natural,for on the one hand, no one has properly researched

    Corucia zebrata (underlined) in it's natural habitat. However,

    many zoos, research institutions, and private individuals have

    had 100% success rate with this species. This is not only in births

    but also a 100% Fecundity as well. Fecundity with Corucia is based

    on one year - a 7.5 month gestation and the time from birth to the

    next mating for the subsequent progeny. If captive aspects of

    possible miscarrage causes are to be addressed, the questions of

    whether environmental or genetic factors play a role are a topic for

    further research. Measurements on stillborn Corucia young may, in

    some way, help address those questions or, at the very least, give a

    perspective of the development process of this livebearing species.


    Research:

    A near term stillborn fetus, with placenta and umbilical

    cord intact, was studied and measured (Father - LCRC/Czz/31,

    Mother - LCRC/Czz/34). This individual was near full term,

    approximately age 6.5 -7 months out of a 7.5 month gestation

    period.


    Weight:

    Umbilical Cord and Placental Sack (completely intact):

    28.35 Grams


    Fetal Weight (minus Umbilical Cord and Placental Sack):

    48.19 Grams


    Length Measurements:


    SVL (Snout To Vent Length):

    125 mm.

    LOA (Length Overall):

    255 mm.


    Discussion:

    The placental attachment, as indicated, shows a

    substantional proportion of weight in the Corucia pregnancy

    approximately 37% of total weight).

    Corucia zebrata (underlined), in the latter stages of fetal

    development, seems to indicate that this

    species develops faster in growth in the tail region than in

    the torso or SVL. Further measurements in this area with

    stillborn young can strengthen this assessment. This is based

    on an average of 39 newborn neonates (Schnirel-Jones, 2006).

    Measurements are: SVL = 135 mm, LOA = 289 mm

    Common Solomon Monkey Skink - Corucia zebrata zebrata

    underlined). SVL = 170 mm, LOA = 370 mm ( North Solomon Monkey

    Skink - Corucia zebrata alfredschmidti (underlined). Also, a

    stillborn North solomon Monkey Skink - Corucia zebrata

    alfredschmidti (underlined), also showed the shortened tail as

    this was also a stillborn not at full development (Father -

    LCRC/Cza/6, Mother - LCRC/CZA/3). The Common Solomon Monkey

    Skink - Corucia zebrata zebrata (underlined), shows from the

    data above, a 10 mm increase in the SVL and a 34 mm increase in

    the LOA in the latter stages of pregnancy. This would seem to

    indicate that the tail length accelerates quicker in growth

    towards the end of the gestation period.


    References:

    Coburn, John; 1985. Prehensile tailed skinks.
    T.F.H. Publications Inc.
    Neptune City,New Jersey. 64
    pages

    DeVosjoli, Phillippe; 1993. The general care and
    maintainence of prehensile
    skinks. Advanced Vivarium
    Systems Inc. Lakeside,
    California, U.S.A. 57 pages.

    Hausechild; Gabner; 1999. Corucia zebrata (underlined):
    Der Wickleschwanz skink. Natur
    and Tier, Munster, Germany 79
    pages.

    Jones, Sherri L.;
    Schnirel, Brian L.; 2006. Subspecies comparison of the
    Genus: Corucia. Polyphemos,
    Volume 4, Issue 1, May,
    Florence, South Carolina,
    U.S.A. pp. 1-25.

    Sincerely,
    Brian L. Schnirel
    LCRC


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  3. #2 Fecundity and Corucia 
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    LEEWAY CORUCIA RESEARCH CENTER (LCRC)


    An addition was inserted in the above paper in the 100% success rate section.

    Sincerely,
    Brian
    LCRC


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