Spiny Softshell (<i>Apalone spinifera</i>) turtles exhibit scarring consistent with attempted lamprey bites
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چکیده
منابع مشابه
Comparative kinematics of the forelimb during swimming in red-eared slider (Trachemys scripta) and spiny softshell (Apalone spinifera) turtles.
Softshell turtles (Family Trionychidae) possess extensive webbing between the digits of the manus, suggesting that the forelimb may serve as an effective thrust generator during aquatic locomotion. However, the hindlimb has previously been viewed as the dominant propulsive organ in swimming freshwater turtles. To evaluate the potential role of the forelimb in thrust production during swimming i...
متن کاملSexual differentiation in the spiny softshell turtle (Apalone spinifera), a species with genetic sex determination.
It is hypothesized on the basis of sex determination theory that species exhibiting genetic sex determination (GSD) may undergo sexual differentiation earlier in development than species with environmental sex determination (ESD). Most turtle species exhibit a form of ESD known as temperature-dependent sex determination (TSD), and in such species the chronology of sex differentiation is well st...
متن کاملResidual yolk energetics and postnatal shell growth in Smooth Softshell Turtles, Apalone mutica.
We examined functions of residual yolk (RY) in hatchling Smooth Softshell Turtles (Apalone mutica). Removal of RY did not affect survival, shell growth, or resting metabolic rates of turtles for 40 d after hatching. Our estimates of metabolic rate suggest that RY can fuel maintenance and activity metabolism for approximately 25 days. A. mutica absorb more than 1g of water in the first 2 weeks o...
متن کاملMultiple data sets, high homoplasy, and the phylogeny of softshell turtles (Testudines: Trionychidae).
We present a phylogenetic hypothesis and novel, rank-free classification for all extant species of softshell turtles (Testudines:Trionychidae). Our data set included DNA sequence data from two mitochondrial protein-coding genes and a approximately 1-kb nuclear intron for 23 of 26 recognized species, and 59 previously published morphological characters for a complimentary set of 24 species. The ...
متن کاملStaging criteria for embryos of the spiny softshell turtle, Apalone spinifera (Testudines: Trionychidae).
Previous work describing the embryonic stages of turtle development has not included members of the highly derived trionychid turtles. Staging criteria are described for the spiny softshell turtle (Apalone spinifera) to facilitate comparisons between phylogenetically distant taxa of turtles. Embryonic development in A. spinifera is placed in the context of the widely used sequence of Yntema sta...
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ژورنال
عنوان ژورنال: The Canadian Field-Naturalist
سال: 2019
ISSN: 0008-3550
DOI: 10.22621/cfn.v132i2.2039