Viviparity (from the Latin vivus (living) and parere (to beget), literally giving live birth), both in zoology and in botany refers to certain classes of modes of reproduction, though it has different meanings in the two contexts. The adjective viviparous is derived from viviparity and describes both the various modes of reproduction and the organisms that reproduce in any such mode. In zoology viviparity refers to development of the embryo inside the body of the parent, eventually leading to live birth, as opposed to reproduction by laying eggs that complete their incubation outside the parental body. There are several forms of reproductive processes that answer to that description however, and they differ so radically, both in their nature and evolutionary origin, that no definitive and exclusive terminology is universally accepted, and the usage of the term is largely a matter of convenience and preference. In botany vivipary is a common alternative form of the term, and botanical ...
Aplacental viviparity is a form of egg development in which the eggs of an organism hatch while still inside the uterus but the developing young arent ...
TY - JOUR. T1 - Conservation of Sex-Linked Markers among Conspecific Populations of a Viviparous Skink, Niveoscincus ocellatus, Exhibiting Genetic and Temperature-Dependent Sex Determination. AU - Hill, Peta. AU - Burridge, Christopher. AU - EZAZ, Tariq. AU - Wapstra, Erik. PY - 2018/4/1. Y1 - 2018/4/1. N2 - Sex determination systems are exceptionally diverse and have undergone multiple and independent evolutionary transitions among species, particularly reptiles. However, the mechanisms underlying these transitions have not been established. Here, we tested for differences in sex-linked markers in the only known reptile that is polymorphic for sex determination system, the spotted snow skink, Niveoscincus ocellatus, to quantify the genomic differences that have accompanied this transition. In a highland population, sex is determined genetically, whereas in a lowland population, offspring sex ratio is influenced by temperature. We found a similar number of sex-linked loci in each population, ...
Animals make use of a variety of modes of reproduction to produce their young. Traditionally this variety was classified into three modes, oviparity (embryos in eggs), viviparity (young born live), and ovoviviparity (intermediate between the first two). However, each of those so-called traditional modes covered a wide range of diverse reproductive strategies. The biologist Thierry Lodé has accordingly proposed five modes of reproduction based on the relationship between the zygote (the fertilised egg) and the parents. His revised modes are ovuliparity, with external fertilisation ; oviparity, with internal fertilisation of large eggs containing a substantial nutritive yolk; ovo-viviparity, that is oviparity where the zygotes are retained for a time in a parent's body, but without any sort of feeding by the parent; histotrophic viviparity, where the zygotes develop in the female's oviducts , but are fed on other tissues; and hemotrophic viviparity, where the developing embryos are fed by the
Pregnancy has been traditionally defined as the period during which developing embryos are incubated in the body after egg-sperm union. Although the term often refers to placental mammals, it has also been used in the titles of many international, peer-reviewed, scientific articles on fish, e.g. Consistent with this definition, there are several modes of reproduction in fish, providing different amounts of parental care. In ovoviviparity, there is internal fertilization and the young are born live but there is no placental connection or significant trophic (feeding) interaction; the mothers body maintains gas exchange but the unborn young are nourished by egg yolk. There are two types of viviparity in fish. In histotrophic viviparity, the zygotes develop in the females oviducts, but she provides no direct nutrition; the embryos survive by eating her eggs or their unborn siblings. In hemotrophic viviparity, the zygotes are retained within the female and are provided with nutrients by her, often ...
Analysis of the distribution, haplotypes and conservation of the viviparous lizard, Zootoca vivipara vivipara (Jacquin, 1787) and the oviparous subspecies, Zootoca vivipara carniolica (Mayer, Böhme, Tiedemann & Bischoff, 2000) in the Bergamasque Prealps. -- In this study we analysed the distribution of two subspecies of the viviparous, Zootoca vivipara (Jacquin, 1787) in Bergamasque Prealps-Orobic Alps. The project was commissioned by Parco delle Orobie Bergamasche (Anfi.Oro.Project 2008/2011); the aim of this project was to further investigate the ecological distributional, conservational and genetic aspects about this lizard. Over the course of the study it emerged that the viviparous subspecies (Zootoca vivipara vivipara) shows a broader distributional range in comparison with the oviparous populations (Zootoca vivipara carniolica, Mayer, Böhme, Tiedemann. & Bischoff, 2000). Z. v. vivipara is present along the watershed between the Brembana Valley and Valtellina, almost entirely ...
Abdominal ridges. Paired dermal ridges running from the pectoral fin base to the pectoral fin base.. Abyssal plain. Sea floor constituting vast expanses of deep ocean from 2000 to 6000 meters deep.. Alar thorns. Large, modified dermal denticles on the wings of adult male skates.. Ampullae of Lorenzini. Pores on the head that pick up electrical signals in the sharks environment.. Anal fin. Single fin located ventrally posterior to the pelvic fins. Not always present.. Anterior. Forward. Towards the snout.. Anterior margin. The leading edge of a fin.. Apex. (apices pl.) The free tip of a fin.. Aplacental yolksac viviparity. A mode of reproduction in which the young are primarily nourished by the yolk within their egg case rather than from a placental connection to the mother. Once the yolk is fully consumed the young are ready to pass through the birth canal. AKA Ovoviviparity.. Aplacental viviparity. A mode of reproduction in which the young are not nourished from a yolk sac placenta but are ...
For a member of the skink family, blue-tongued skinks are among the best suited for lives in captivity for several reasons. Being relatively slow-moving, theyre not as difficult to handle compared to most of the slender skink species. Blue-tongued skinks short, thick physique makes them easy to hold, even by children. Although a biter is occasionally encountered, most adult blue-tongued skinks are loathe to even open their mouths, much less show off their startlingly fat, blue tongues that earned them their common name.. A 20-gallon long aquarium should be considered minimal housing for one specimen. Nearly any substrate from sand to pebbles to aspen provides blue-tongued skinks an adequate material to wander about in. A simple shelter of stone or a concave piece of wood will serve as a hide box. Blue-tongued skinks should have a small bowl of water available at all times. They may also receive needed moisture from pieces of fruit or other vegetation, which makes up the bulk of their diet. ...
My major interest has been to understand the molecular-structural aspects of all regions - apical and basolateral - of the plasma membrane of uterine epithelial cells, especially during early pregnancy and the period of blastocyst attachment, with a view to understanding the changed molecular organization which takes place during early pregnancy and how this contributes to uterine receptivity for attachment. I have also been interested in this phenomenon from a purely cytological viewpoint, seeing it as an opportunity to contribute to understanding of fundamental plasma membrane phenomena. Mammals have been widely studied in this context and my own work has used rats as the experimental animal with human tissue providing direct clinical relevance and extending the work into another species. In recent years however, I have wondered if such fundamental structural alterations in a key organelle as the plasma membrane of uterine epithelial cells might not be a characteristic of viviparity (live ...
Reproduction. Scope Note Narrower Term: Cattle Reproduction Narrower Term: Cell nuclei Transplantation Narrower Term: Conjugation (Biology) See Also: Embryology Narrower Term: Fertility Narrower Term: Fertilization (Biology) Narrower Term: Fetus Narrower Term: Gametogenesis See Also: Generative organs Narrower Term: Gynogenesis Narrower Term: Human reproduction Narrower Term: Isolating mechanisms Narrower Term: Ovulation Narrower Term: Paedogenesis Narrower Term: Parthenogenesis Narrower Term: Parthenogenesis in animals Narrower Term: Parturition Narrower Term: Pregnancy Narrower Term: Sexual cycle Narrower Term: Spawning Narrower Term: Spontaneous generation See Also: Theriogenology Narrower Term: Viruses Reproduction Narrower Term: Viviparity Narrower Term: Domestic animals Reproduction Narrower Term: Livestock Reproduction Narrower Term: Bacteriophage mu Reproduction Narrower Term: Oncogenic DNA viruses Reproduction Narrower Term: Herpes simplex virus Reproduction Narrower Term: Herpesviruses ...
In this article we will discuss about the development of fishes. In the second part of the study, multicolour fluorescence in-situ hybridization (FISH) analyses on good quality embryos, representing the uneven (n = 11) and even (n = 13) study groups were performed. TOS 7. Viviparity is a type of reproductive system in which the embryo utilizes a maternal nutrient supply until birth. Place it under a simple binocular microscope. TABLE 2. cell wall nucleus chloroplasts mitochondria cell membrane 1 See answer amor9185 is waiting for your help. Rice and Stoke (1974) supported the hypothesis that O-U cycle enzymes can function to produce intermediates in other metabolic pathways. According to Pinus (1974), tiulka (Culpeonella delicatula) is most abundant fish of the sea of Azon with catches amounting to 40-50% of the total fish landed from this sea. 21.1a-g). Application of a cell-based gene transfer strategy to agriculturally important fish species will provide a method to efficiently manipulate ...
October 2014 continues - for no particular reason at all - to be Lizard Month here at Tet Zoo and right now its time for more skinks. The previous article is a sort of general introduction to the group as well as a review of the limbless acontiines/acontids and weird feylinines.
I mean, if they are pregnant I dont want them to give … At the current time, researchers arent sure whether or not Celestial Pearl Danios are in danger of going extinct. They will spawn in groups. They will also swim with other peaceful fish living in the same community tank. This is a fairly new tank setup, and Id like to do a water change, but dont want to disturb the fry too much. Zebra danios are not live-bearing fish, so they do not get pregnant. From a fin perspective, were it not for their swim bladder and gill challenges, these fish would do well in tanks of all depths. There is some observation from aquarium fish traders that population numbers are declining. They are, indeed, gorgeous fish that will also display a good bit of personality once they get to know you. To encourage them to breed, you dont have to do anything. The males are streamlined in appearance. If you dont have room for a nursery tank and large numbers of Galaxy Rasboras, simply leave the parent fish in the ...
Known from depths of 0 to 20 m (Ref. 7727). Members of the order Cephalaspidea are mostly simultaneous hermaphrodites (Ref. 833). ...
original description Spence Bate, C. (1888). Report on the Crustacea Macrura collected by the Challenger during the years 1873-76. eport on the Scientific Results of the Voyage of H.M.S. Challenger during the years 1873-76. 24: i-xc, 1-942, Plates 1-157. [details] ...
The U.S. Navy is leading a 30-nation maritime exercise across Middle Eastern waters which it says will help protect international trade routes
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They have the slithery, cylindrical body of a snake, the proportionately stunted arms of a T. rex, and knowing, lidded eyes that are reminiscent of our own species.Theyre skinks, and Zach Griffith
A bone-healthy version of a fish chowder called Cullen Skink. This home made soup has an abundance of healthy nutrients for your body . Click to learn more!
Is there anything I definitely should or shouldnt be doing at This point? Or things I should be watching for? I dont know his age but his size seems consistent with right between baby and adult. Im not certain of the gender. I think i need to leave him alone more but honestly Im really nervous about doing something wrong. Beardeds are so much easier at this point in that they dont hide in the ground leaving you to wonder whats going on, they also have no problem basking all damned day, whereas my BTS has been burried in the substrate on the hotside but also on the coolside. And I think he spends more time on the coolside not because hes hot but to avoid me ...
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Aceptado: 17 febrero 2012.. Abstract. Egg retention (ER) and intrauterine embryonic development (IED) have been considered intermediate steps in the evolution from oviparity to viviparity. Sceloporus aeneus is an oviparous lizard that is closely related to the viviparous species (Sceloporus bicanthalis). The present study addresses the following 2 questions: 1) Are intermediate stages of egg retention (ER and IED) present in populations of Sceloporus aeneus? and 2) Are ER and/or IED explained by elevation, precipitation or phylogenetic effects? Results indicate that in S. aeneus, ER differs among populations. ER was negatively related to altitude and pluvial precipitation, whereas average environmental temperature had no effect on ER or IER. In contrast to previous observations of oviparous species related to viviparous species, populations of S. aeneus with advanced IED are associated with environmental factors such as low elevation and aridity instead of high elevation and cold climate, ...
Numerous species of lizard are kept as pets, including bearded dragons,[62] iguanas, anoles,[63] and geckos (such as the popular leopard gecko).[62]. Lizards appear in myths and folktales around the world. In Australian Aboriginal mythology, Tarrotarro, the lizard god, split the human race into male and female, and gave people the ability to express themselves in art. A lizard king named Moo features in Hawaii and other cultures in Polynesia. In the Amazon, the lizard is the king of beasts, while among the Bantu of Africa, the god Unkulunkulu sent a chameleon to tell humans they would live forever, but the chameleon was held up, and another lizard brought a different message, that the time of humanity was limited.[64] A popular legend in Maharashtra tells the tale of how a common Indian monitor, with ropes attached, was used to scale the walls of the fort in the Battle of Sinhagad.[65]. Green iguanas are eaten in Central America, where they are sometimes referred to as chicken of the tree ...
Background Xiphophorus fishes are represented by 26 live-bearing species of tropical fish that express many attributes (e.g., viviparity, genetic and phenotypic variation, ecological adaptation, varied sexual developmental mechanisms, ability to produce fertile interspecies hybrids) that have made attractive research models for over 85 years. Use of various interspecies hybrids to investigate the genetics underlying spontaneous and induced tumorigenesis has resulted in the development and maintenance of pedigreed Xiphophorus lines specifically bred for research. The recent availability of the X. maculatus reference genome assembly now provides unprecedented opportunities for novel and exciting comparative research studies among Xiphophorus species. Results We present sequencing, assembly and annotation of two new genomes representing Xiphophorus couchianus and Xiphophorus hellerii. The final X. couchianus and X. hellerii assemblies have total sizes of 708 Mb and 734 Mb and correspond to 98 % and ...
To examine the extent to which aquatic prey-capture behavior in salamanders is stereotyped and how feeding kinematics scales with size, the ontogenetic variability of aquatic feeding behavior was examined in eight Salamandra salamandra. Feeding kinematics (seven duration and angular displacement variables), kinematic variance and capture performance were quantified and compared in the first several feedings after birth with a series of feedings 8 weeks later, just prior to metamorphosis. Analysis of variance revealed no statistically significant ontogenetic differences in the kinematic variables, and individual differences were found in only two variables (maximum gape angle and gape cycle time). A comparison of the relative kinematic variance within individuals revealed no significant differences in variance during ontogeny. In addition, capture success rate did not change. The strike is significantly faster than that of other salamanders. These results indicate that the initial prey-capture ...
Common fire salamander squirting toxins at inquisitive wolf - View incredible Common fire salamander videos - Salamandra salamandra - on Arkive
Offspring size is a key life-history trait that can affect all aspects of performance [1]. Within many taxa, larger offspring perform better than their smaller conspecifics; they survive, grow and reproduce more than smaller offspring [2-4]. Larger offspring can also be more resistant to predation and starvation and are often better competitors than smaller offspring [5-8]. Benefits of increased offspring size are not inevitable however, and they are not universal [3]. For example, in some instances, increased offspring size can confer a fitness disadvantage, where bigger offspring have higher mortality than smaller offspring [9]. Generally, offspring size effects manifest in early development, but they can persist throughout the life history affecting reproduction and even the performance of the subsequent generation [10]. Understanding the relationship between offspring size and performance is of fundamental importance to life-history theorists because this relationship should drive the ...
Domain architectures containing the following SCOP superfamilies _gap_,90257 in Xiphophorus maculatus 69_4.4.2. Domain architectures illustrate each occurrence of _gap_,90257.
Animal reproductive system - Animal reproductive system - Adaptations for internal fertilization: Fertilization among vertebrates may be external or internal, but internal fertilization is not always correlated with viviparity or the presence of intromittent (copulatory) organs. The latter, uncommon among fishes, amphibians, and birds, are present in all reptiles (except Sphenodon) and mammals. A considerable number of fishes are viviparous; in them, fertilization is internal, and the males have intromittent organs. The claspers of most male elasmobranchs are usually paired extensions of pelvic fins that are inserted into the females uterus for transfer of sperm. The clasper, supported by modified fin cartilages, contains a groove along which sperm are conveyed into the
Recently, phylogenetics has expanded to routinely include estimation of clade ages in addition to their relationships. Various dating methods have been used, but their relative performance remains understudied. Here, we generate and assemble an extensive phylogenomic data set for squamate reptiles ( …
A scientific study from the Stowers Institute of Medical Research is issued in the Journal Developmental Cell. It focuses on the regeneration of hair cells in fish and reveals an important component of this secret weapon in fish. According to the study, the support cells cause the regeneration of the sensory hair cells in fish.. The inner ear sensory hair cells succumb to age or injuries. The older an individual gets, the less likely is he to hear well. Interestingly, humans are one-upped by fish here. Fishes have hair cells in their sensory system that dots their bodies and forms the lateral line. They discern the movement of water with these cells. These cells are readily regenerated, by support cells, if damaged or death occurs. These support cells surround centrally-located hair cells in each garlic-shaped sensory organ or neuromast.. Intriguingly, mammals also have supports cells. However, they dont respond to hair cell death in a similar manner. In order to develop an insight into how ...
The European common lizard Zootoca vivipara exhibits reproductive bimodality, with populations being either viviparous or oviparous. In the central-eastern Italian Alps oviparous populations (Z. v. carniolica) and viviparous populations (Z. v. vivipara) partly overlap geographically. Studying the evolutionary relationship between these taxa presents an interesting opportunity to gain insight into the evolution of this trait. We aim to: i) test whether Z. v. carniolica, which is endangered, constitutes an ESU (Evolutionary Significant Unity); ii) infer mtDNA divergence time between the Z. v. carniolica clade and all the other Z. vivipara subspecies with the aid of an external calibration point; and iii) describe the phylogeographical and demographic scenarios in the area. To do so we sequenced about 200 individuals for mitochondrial variation; 64 of them were also analysed for three nuclear genes. Furthermore, we analysed the same nuclear markers in 17 individuals from the other oviparous subspecies Z. v
The seasonal histological changes occuring in the ovary, corpus luteum, and testis of the viviparous lizard, Xantusia vigilis / by Malcolm R. Miller. - Berkeley ; Los Angeles, 1948 ...
Ferrão, M,, R. de Fraga, P. I. Simões, and A. P. Lima. 2014. On the poorly sampled Amazonian frogs genus Hydrolaetare (Anura: Leptodactylidae): geographic ranges and species identification. Salamandra 50: 77-84 ...
Teixeira, B. F. V., and A. A. Giaretta. 2015. Setting a fundament for taxonomy: advertisement calls from the type localities of three species of the Dendropsophus rubicundulus group (Anura: Hylidae). Salamandra 51: 137-146 ...
Fire Salamanders (Salamandra) - The first salamanders described, this diverse genus of species and subspecies can be found throughout Europe and the
Nine salamander hearts have been studied histologically by means of serial sections, cut in each of three planes (transverse, frontal and sagittal), and stained with haemalum and eosin, van Giesons acid fuchsin and iron-haematoxylin, and by the protargol method of Bodian. I his study has demonstrated muscular continuity between the several cardiac chambers, and the entile absence of any specialized muscle or nodal tissue at the junctional sites or in any other part of the heart. The heart muscle forms a continuum. The cardiac muscle fibres are characterized by their large size (i.e. breadth); they have the same general histological characters in all parts of the heart. Measurements are given for the fibres from various parts of the hearts of the salamander and frog. The muscular connexions between the various cardiac chambers have been studied in detail. In each of the chambers the musculature is arranged in a basket-work fashion, but at each of the junctional sites the muscle suddenly ...
Shen, Y., Chalopin, D., Garcia, T., Boswell, M., Boswell, W., Shiryayev, S., Agarwala. R., Volff, J-N, Postlethwait, J.H., Schartl, M., Minx, P., Warren, W.C., and R.B. Walter. (2016). X. couchianus and X. hellerii genome models provide genomic variation insight among Xiphophorus species, BMC Genomics. doi: 10.1186/s12864-015-2361-z. Schartl, M., Shen, Y., Maurus, K., Walter, R., Tomlinson, C., Wilson, R.K., Postlethwait, J., Warren, W.C. (2015). Whole Body Melanoma Transcriptome Response in Medaka. Plos One doi:10.1371/journal.pone.0143057. Chang, J., Lu, Y., Boswell, W.T., Boswell, M., Caballero, K.L., Walter, R.B. (2015) Molecular genetic response to varied wavelengths of light in Xiphophorus maculatus skin. Comp Biochem Physiol C Toxicol Pharmacol., 178:104-15. doi: 10.1016/j.cbpc.2015.10.002. PMID: 26460196. Boswell, W., Boswell, M., Titus, J., Savage, M., Lu, Y., Shen, J., Walter, R.B. (2015) Sex-specific molecular genetic response to UVB exposure in Xiphophorus maculatus skin. Comp ...
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Skinks (properly Scincidae… though read on) are one of the most successful of squamate groups, accounting for approximately 1500 species - in other words, for about 25% of all lizards.
p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.,/p> ,p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.,/p> ,p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).,/p> ,p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x,sup>64,/sup> + x,sup>4,/sup> + x,sup>3,/sup> + x + 1. The algorithm is described in the ISO 3309 standard. ,/p> ,p class=publication>Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.,br /> ,strong>Cyclic redundancy and other checksums,/strong>,br /> ,a href=http://www.nrbook.com/b/bookcpdf.php>Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993),/a>),/p> Checksum:i ...
p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.,/p> ,p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.,/p> ,p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).,/p> ,p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x,sup>64,/sup> + x,sup>4,/sup> + x,sup>3,/sup> + x + 1. The algorithm is described in the ISO 3309 standard. ,/p> ,p class=publication>Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.,br /> ,strong>Cyclic redundancy and other checksums,/strong>,br /> ,a href=http://www.nrbook.com/b/bookcpdf.php>Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993),/a>),/p> Checksum:i ...
Kattner, G. , Graeve, M. , Calcagno, J. A. , Lovrich, G. A. , Thatje, S. and Anger, K. (2003): Lipid, fatty acid and protein utilization during lecithotrophic larval development of Lithodes santolla (Molina) and Paralomis granulosa (Jacquinot) , Journal of Experimental Marine Biology and Ecology ...
After the bull elasmosaur has litten up an area half the size of a football field it retreats over to the edge of light show, cloaked in darkness, and waits. He does not have to wait long for out of the blackness emerges another topside explorer of these depths. A primitive scromboid fish, itself equipped with advanced thermoregulatory features that allow it to exploit such productive but cold depths, has arrived to investigate the disturbance. At over a meter long the high octane fish - which usually cruises warmer and shallower water during the day in between dives - is usually met with a welcome feast when it investigates such scenes. And here is no exception as it voraciously ram feeds on the various cephalopods, crustaceans, annelids, jellies, and tunicates swarming in the melee. The visual detection of the fish is geared towards near sighted objects, 10 meters below it it does not see or feel the 11 meter long monster of the deep pivoting slowly into strike position. As the fish makes long ...
After the bull elasmosaur has litten up an area half the size of a football field it retreats over to the edge of light show, cloaked in darkness, and waits. He does not have to wait long for out of the blackness emerges another topside explorer of these depths. A primitive scromboid fish, itself equipped with advanced thermoregulatory features that allow it to exploit such productive but cold depths, has arrived to investigate the disturbance. At over a meter long the high octane fish - which usually cruises warmer and shallower water during the day in between dives - is usually met with a welcome feast when it investigates such scenes. And here is no exception as it voraciously ram feeds on the various cephalopods, crustaceans, annelids, jellies, and tunicates swarming in the melee. The visual detection of the fish is geared towards near sighted objects, 10 meters below it it does not see or feel the 11 meter long monster of the deep pivoting slowly into strike position. As the fish makes long ...
Do you know which blue tongue skink subspecies you have? Find out with this helpful guide in ReptiFiles blue tongue skink care packet!
Domain: Eukaryota • Regnum: Animalia • Phylum: Chordata • Subphylum: Vertebrata • Infraphylum: Gnathostomata • Superclassis: Tetrapoda • Classis: Reptilia • Subclassis: Anapsida • Ordo: Testudines • Subordo: Cryptodira • Superfamilia: Chelonioidea • Familia: Cheloniidae • Genus: Eretmochelys • Species: Eretmochelys imbricata (Linnaeus, 1766) ...
A group of European researchers developed a computerized robotic model of a salamander. According to the press release by the Ecole Polytechnique
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Little is known about the mode of reproduction, growth rate and recoverability of foraminifera. In the absence of such information, assessment of recovery potential has to be precautionary and may be more than five years.. The larval development of Thyasira equalis is lecithotrophic and the pelagic stage is very short or suppressed. This agrees with the reproduction of other Thyasira sp., and in some cases (e.g. Thyasira gouldi) no pelagic stage occurs at all (Thorson, 1946, 1950). This means that larval dispersal is limited. If mortality of Thyasira sp. occurs, there would have to be nearby populations for recovery to occur. Where some individuals survive, due to the fact that larvae spend little or no time in the water column, post-settlement survival may be higher, and the population may be able to recover. It is also possible that adults could be brought into the area by bed load transport, enabling colonization (Riley, 2002). Sparks-McConkey and Watling (2001) found that a population of ...
In the classical era, Aristotle divided animals,[d] based on his own observations, into those with blood (roughly, the vertebrates) and those without. The animals were then arranged on a scale from man (with blood, 2 legs, rational soul) down through the live-bearing tetrapods (with blood, 4 legs, sensitive soul) and other groups such as crustaceans (no blood, many legs, sensitive soul) down to spontaneously-generating creatures like sponges (no blood, no legs, vegetable soul). Aristotle was uncertain whether sponges were animals, which in his system ought to have sensation, appetite, and locomotion, or plants, which did not: he knew that sponges could sense touch, and would contract if about to be pulled off their rocks, but that they were rooted like plants and never moved about.[143]. In 1758, Carl Linnaeus created the first hierarchical classification in his Systema Naturae.[144] In his original scheme, the animals were one of three kingdoms, divided into the classes of Vermes, Insecta, ...
ID M4APG4_XIPMA Unreviewed; 719 AA. AC M4APG4; DT 01-MAY-2013, integrated into UniProtKB/TrEMBL. DT 01-MAY-2013, sequence version 1. DT 20-DEC-2017, entry version 31. DE SubName: Full=Cyclic nucleotide gated channel alpha 3a {ECO:0000313,Ensembl:ENSXMAP00000016359}; OS Xiphophorus maculatus (Southern platyfish) (Platypoecilus maculatus). OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; OC Actinopterygii; Neopterygii; Teleostei; Neoteleostei; Acanthomorphata; OC Ovalentaria; Atherinomorphae; Cyprinodontiformes; Poeciliidae; OC Poeciliinae; Xiphophorus. OX NCBI_TaxID=8083 {ECO:0000313,Ensembl:ENSXMAP00000016359, ECO:0000313,Proteomes:UP000002852}; RN [1] {ECO:0000313,Ensembl:ENSXMAP00000016359} RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RC STRAIN=JP 163 A {ECO:0000313,Ensembl:ENSXMAP00000016359}; RA Walter R., Schartl M., Warren W.; RL Submitted (JAN-2012) to the EMBL/GenBank/DDBJ databases. RN [2] {ECO:0000313,Ensembl:ENSXMAP00000016359} RP IDENTIFICATION. RC STRAIN=JP ...
Skinks are pretty common animals. You have likely already seen one in your backyard since these lizards love to spend their days basking in the warm sun.
Native to Australia, plague skinks were first recorded in Auckland during the 1960s and are now posing a threat to our rare native lizards.
Im Urweltmuseum Hauff sind einzigartig erhaltene Versteinerungen aus der Jurazeit rund um die Fossilienfundstätte Holzmaden zu sehen. Die institutseigene Werkstatt Hauff Fossils präpariert Fossilien für den freien Verkauf.
Scincella lateralis, the Ground skink; Alachua county, Florida (05 July 2018). A reference shot of the diminutive Ground skink in the curious hands of Eric. Thats a small skink to get a smart phone picture with! Learn more about this species at iNaturalist.org.
Description: The dorsal color of the Crevice spiny lizard is grayish-green to red. The dorsal scales are large and spiny. A dark band across the neck may be lined with white on either side. The long tail has black and white bands. Males have blue patches on the throat and sides of the belly. The upper side of females and juveniles have dark crossbands.. Size: Including the tail, these adult lizards reach lengths of 5 -11.5 inches (12.7 - 29 cm).. Behavior: These diurnal lizards are active and quick but are considered to be rather shy and nervous and will retreat to rocky crevices when threatened.. Diet: They mainly feed on insects, arthropods and will also consume vegetation that is tender.. Senses: This species is an ambush forager, with vision being their primary sense.. Communication: Males often display to females and advertise territory by displaying their colorful throats and underside. Head bobbing and tail raising may also be observed.. Reproduction: Females give birth to live young in ...
Mammals are warm-blooded (endothermic) vertebrates with hair. They breath air and give birth to live young, which feed on milk produced by their mothers. Some mammals in the vernal pool prairie spend most of their time underground. The burrows they dig create homes for many other animals. ...
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Information portal for reptile and amphibian hobbyists offering classifieds, forums, photo galleries, events, business listings and much more for various species
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for their agenda, a godless one. This is a footnote from de la Beche and Conybeare 1821, the first description of a plesiosaur: When alluding to the regular gradation, and, as it were, the linked and concatenated series of animal forms, we would wish carefully to guard against the absurd and extravagant application which has sometimes been made of this notion. In the original formation of animated beings, the plan evidently to be traced throughout is this. That every place capable of supporting animal life should be so filled, and that every possible mode of sustenance should be taken advantage of; hence every possible variety of structure became necessary, many of them such as to involve a total change of parts, but others again, such as required nothing beyond a modification of similar parts, slight indeed in external appearance, yet important in subserving the peculiar habits and economy of the different animals; in these cases the unity of general design was preserved, while the requisite ...
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