Species oviparity. Medical search. Frequent questions

The traditional modes of reproduction include oviparity, taken to be the ancestral condition, traditionally where either unfertilised oocytes or fertilised eggs are spawned, and viviparity traditionally including any mechanism where young are born live, or where the development of the young is supported by either parent in or on any part of their body. (wikipedia.org)
Oviparity or viviparity? (wikipedia.org)
Early origin of viviparity and multiple reversions to oviparity in squamate reptiles. (reptarium.cz)
oviparity (egg-laying) or viviparity (eggs not laid: the female gives birth to larvae or juveniles). (froglife.org)
Biologists had noticed many lizards and snakes display flexible reproductive strategies across oviparity and viviparity. (scitechdaily.com)
Other fossils, including a choristodere from the Cretaceous of China, described here, show the to-and-fro between oviparity and viviparity happened in other groups, not just in lizards. (scitechdaily.com)
Oviparity is the process of laying eggs, ovoviviparity is the process of retaining eggs internally and giving birth to live young, and viviparity is the process of giving birth to live young without laying eggs. (reptileszilla.com)
These strategies include oviparity, ovoviviparity, and viviparity. (reptileszilla.com)
Within this group, some of the animals give birth to live young, called viviparity, and some lay eggs, called oviparity. (beachcombingmagazine.com)
Other marine creatures, such as most sharks and rays, also exhibit ovoviviparity, while some species, like marine mammals, utilize viviparity, where the embryos develop within the mother and receive direct nourishment from her. (aquaticanimalcamp.com)
Although rare, there are three identified (so far) amphibian species where females can engage in either egg-laying (oviparity) or give birth to live young (viviparity). (carinbondar.ca)
Lecithotrophic modes include oviparity (such as the catsharks of the family Scyliorhinidae, or the entire subclass Holocephali) and yolk sac viviparity (such as Hexanchiformes), where the only nourishment comes from their yolk sack. (encyclopedia.pub)
While it's possible that the skink is transitioning between oviparity, the ability to lay eggs, and viviparity, or the ability to give birth, the ultimate evolutionary trajectory of the animal remains unpredictable. (happyeconews.com)
Researchers from the University of Exeter and the University of Lincoln investigated the hypotheses that historical invasions of cold climates by Liolaemus lizards â€" one of the most diverse groups of vertebrates on earth â€" have only been possible due to their evolution to viviparity (live birth) from oviparity (laying eggs). (netweather.tv)
Remarkably, however, once these species evolve viviparity, the process is mostly irreversible and they remain restricted to such cold climates. (netweather.tv)
They present evidence for the re-evolution of oviparity, or egg laying, in "Old World sand boas in the genus Eryx nearly 60 million years after the initial boid transition to viviparity" based on a phylogenetic analysis of genetic data from boid snakes and other related groups. (blogspot.com)
viviparity, giving birth to live young, ovoviviparity, where young develop in eggs within the womb and oviparity when eggs are laid and develop in the water. (rachelbrooksart.com)

The egg is not retained in the body for most of the period of development of the embryo within the egg, which is the main distinction between oviparity and ovoviviparity. (wikipedia.org)

Descriptions of some undescribed species of reptiles collected by Dr. Joseph Hooker in the Khassia Mountains, East Bengal, and Sikkim Himalaya. (reptarium.cz)
Liste des reptiles nouveaux découverts, en 1866, sur la côte sud-ouest de Madagascar. (reptarium.cz)
By examining their population dynamics and habitat preferences, researchers can gain valuable insights into how this species has successfully coexisted with other reptiles in this Mediterranean woodland region for centuries. (sustainable-jerusalem.org)
Oviparity is the most common reproductive strategy among reptiles. (reptileszilla.com)
Oviparity, or egg-laying, is a reproductive strategy employed by many species of reptiles. (reptileszilla.com)
The primary advantage of oviparity is that it allows reptiles to reproduce in a wide variety of habitats. (reptileszilla.com)
Another advantage of oviparity is that it allows reptiles to produce large numbers of offspring. (reptileszilla.com)

However, the biologist Thierry Lodé recently divided the traditional category of oviparous reproduction into two modes that he named ovuliparity and (true) oviparity respectively. (wikipedia.org)
Distinguishing between the definitions of oviparity and ovuliparity necessarily reduces the number of species whose modes of reproduction are classified as oviparous, as they no longer include the ovuliparous species such as most fish, most frogs and many invertebrates. (wikipedia.org)
The intricate shape and structure of gonopods vary among different centipede species, reflecting the diversity of adaptations that have evolved in these arthropods for successful reproduction. (insecta-inspecta.com)
These rituals serve the crucial function of ensuring that potential mates are of the same species and are ready for reproduction. (insecta-inspecta.com)
To ensure successful reproduction, many species of fish will perform elaborate courtship dances before mating. (fishyfeatures.com)
The courtship dance is a vital part of fish reproduction, helping to ensure that members of the same species successfully mate and produce offspring. (fishyfeatures.com)
Their slow rate of reproduction means many species of sharks are highly vulnerable to fishing and may take a long time to recover if stocks are depleted. (sharksmart.com.au)
Whale Shark Reproduction: An Oviparous Species? (aquaticanimalcamp.com)
The mechanism of reproducing individuals of the same species is known as reproduction. (leverageedu.com)
Though the exact practice of reproduction among Stegosaurus species has been highly debated amongst paleontologists for centuries, modern research has concluded that these ancient creatures reproduced via oviparity. (dinosaur.org)
Chondrichthyan species reproduction modes are diverse and can be divided according to the nutrition of the embryos. (encyclopedia.pub)
Three-toed skinks are one of a handful of species capable of bimodal reproduction, meaning that some populations are oviparous while others are viviparous. (happyeconews.com)
Mammals are typically associated with this type of reproduction, but there are many modern reptile species that give birth, from turtles and lizards to snakes, crocodiles, and dinosaurs . (zmescience.com)
Reproduction is by oviparity, with at least two amber colored egg capsules (one for each uterus) which are smooth, lacking longitudinal grooves and measuring about 15.2 cm long and 5.8 cm wide (Ref. 101269 ). (mnhn.fr)

Many species of fish , most species of lizards and snakes , all species of crocodilians and birds , and even certain primitive mammals such as the platypus and echidnas achieve internal fertilization of their eggs through copulation. (jrank.org)
New Metrics for Comparison of Taxonomies Reveal Striking Discrepancies among Species Delimitation Methods in Madascincus Lizards. (reptarium.cz)
Sometimes, closely related species show both behaviors, and it turns out that live-bearing lizards can flip back to laying eggs much more easily than had been assumed. (scitechdaily.com)
Climate change could lead to dozens of species of lizards becoming extinct within the next 50 years, according to new research. (netweather.tv)

Values for changes in mass reported for over 20 different shark species were synthesised and recalculated, revealing multiple typographical, transcribing, calculation and rounding errors across many papers. (edu.au)
Of the 370-plus shark species in the world, more than 100 live in our waters. (sharksmart.com.au)
The high number of shark species along our coastline is an indication of how healthy our marine ecosystems truly are. (sharksmart.com.au)
There's also a maximum size limit for all whaler shark species, including tiger sharks, in the West Coast and South Coast Bioregions. (sharksmart.com.au)
The overwhelming majority of shark species feed almost entirely on a variety of fish and invertebrates. (sharksmart.com.au)
Many shark species are viviparous, which means they give birth to live young. (sharksmart.com.au)
This unique reproductive strategy sets whale sharks apart from many other shark species which commonly lay eggs. (aquaticanimalcamp.com)
Unlike many other shark species, whale sharks do not lay eggs. (aquaticanimalcamp.com)
This reproductive method ensures the survival of the whale shark species as it provides a more protective environment for the growing embryos. (aquaticanimalcamp.com)
While some argue that whale sharks are oviparous, laying eggs like other shark species, the scientific evidence is still inconclusive. (aquaticanimalcamp.com)
Now we couldn't report on shark news without touching on the reality for a lot of shark species. (rachelbrooksart.com)
Populations of the five main shark species found inhibiting coral reefs have declined further than previously thought. (rachelbrooksart.com)

One of the earliest known species of sharks is the Cladoselache. (sharkguardian.org)
There are more than 470 species of sharks split across thirteen orders, including four orders of sharks that have gone extinct. (sharkguardian.org)
The white shark, whale shark, northern river shark, grey nurse shark and all sawfish (which are related to sharks) are also listed as protected species and can't be kept by commercial or recreational fishers. (sharksmart.com.au)
Sharks are typically slow growing, late maturing, long-lived and produce only a few young per year, which makes many species more vulnerable to overfishing than most bony fish. (sharksmart.com.au)
Port Jackson sharks and many ray species have large plate-like teeth for crushing hard-shelled prey, like crabs and other invertebrates. (sharksmart.com.au)
Different species of sharks have lifespans varying from a few years to several decades. (sharksmart.com.au)
Whale sharks, the largest fish species in the world, do not lay eggs but instead give birth to live young. (aquaticanimalcamp.com)
Whale sharks, despite their name, are not whales but the world's largest fish species. (aquaticanimalcamp.com)
Despite this, expert opinions and theories continue to emerge, with some suggesting that whale sharks may practice internal fertilization, similar to viviparous species. (aquaticanimalcamp.com)
Sperm extraction and artificial insemination may serve ex situ conservation initiatives for threatened sharks and related species. (encyclopedia.pub)
The class Chondrichthyes comprises 1472 species classically divided into the holocephalans (subclass Holocephali), which are commonly named chimaeras, and the elasmobranchs (subclass Elasmobranchii), commonly named sharks and rays [ 3 ] . (encyclopedia.pub)
This last group, the sharks, is perhaps the most recognizable group among Chondrichthyans despite not being as numerous in terms of the number of species as the group formed by the rays and skates [ 5 ] [ 6 ] . (encyclopedia.pub)
The situation is particularly sensitive in places such as the Mediterranean Sea, a key hotspot of extinction risk, where half the species of rays and sharks face an elevated risk of extinction [ 10 ] . (encyclopedia.pub)
With the lifestyle of a basking shark being so different to the other mackerel sharks and predatory fish they share this feature with, this only leads to more questions about this enigmatic species! (rachelbrooksart.com)

When some species' embryos begin to develop teeth, they eat their unborn brothers and sisters until one shark remains, an act known as intrauterine cannibalism. (sharkguardian.org)

In addition to the statistical support for re-evolution, they note that morphological evidence includes the fact that, like live born boas, the hatchlings of the "oviparous Eryx lack an egg-tooth providing independent evidence that oviparity is a derived state in these species. (blogspot.com)
And, the shells of the boas that have re-evolved oviparity are extremely thin compared with the shells of other boas, suggesting that the structure of the eggshell re-evolved as well. (blogspot.com)
Boas and pythons are two of the most well-known snake species living in North and South America, Africa, Asia, and Australia. (farmsteadly.com)

In whichever form they are laid, the eggs of most ovuliparous species contain a substantial quantity of yolk to support the growth and activity of the embryo after fertilisation, and sometimes for some time after hatching as well. (wikipedia.org)
This is taken to be the derived condition, whether the male inserts the sperm into the female intromittently or whether she actively or passively picks it up-the female lays eggs containing zygotes with a substantial quantity of yolk to feed the embryo while it remains in the egg, and in many species to feed it for some time afterwards. (wikipedia.org)
However, some species do not feed as larvae, but obtain their nutrition from their large remaining yolk reserves: these are termed endotrophic. (froglife.org)
Oviparity- The fertilised eggs are laid outdoors, where the yolk provides nutrition. (leverageedu.com)

The paper "Facultative oviparity in a viviparous skink ( Saiphos equalis )" has been published in the journal Biology Letters . (zmescience.com)

These fertilized eggs are later laid and develop externally, representing oviparity. (jrank.org)
If the eggs are then laid to develop externally, the process represents oviparity. (jrank.org)
This means that instead of laying eggs externally, like oviparity, the female whale shark retains the eggs internally until they hatch. (aquaticanimalcamp.com)

This raises concerns for the validity of the current threshold value used to discern between lecithotrophic and matrotrophic species. (edu.au)

In many centipede species, males are often slightly smaller than females and may possess more elaborately developed antennae. (insecta-inspecta.com)
This species is small to moderate-sized with a snout-vent length range of 17.3 - 20.2 mm in males and two females having snout-vent lengths of 26.9 and 27.0 mm. (amphibiaweb.org)
One of the species that has been studied in the most detail in WA, the dusky shark, probably lives longer than 50 years and females don't start reproducing until they're 29 years old. (sharksmart.com.au)

As each egg case species comes in various shapes, sizes, and colors, marine biologists can count the number and types of egg cases that wash up on shore to help give an estimate of the Chondrichthyes population in a certain area. (beachcombingmagazine.com)
Scyliorhinus ugoi , a new species of catshark from Brazil (Chondrichthyes: Carcharhiniformes: Scyliorhinidae). (mnhn.fr)

Although many people think that all fishes reproduce in the same way, there are actually various techniques that depend on the species, environment, and other factors. (fishyfeatures.com)

Among its inhabitants are numerous reptile species that have adapted to this particular environment over time. (sustainable-jerusalem.org)
Additionally, understanding the interactions between reptile species within this complex ecosystem can shed light on broader ecological processes occurring not only in Jerusalem Forest but also in similar habitats worldwide. (sustainable-jerusalem.org)
Species diversity within the Jerusalem Forest is impressive, with numerous reptile species calling this ecosystem home. (sustainable-jerusalem.org)

By delving into topics such as species diversity, behavior behavioral ecology, and conservation status, we hope to contribute to the existing body of knowledge surrounding this unique reptilian community. (sustainable-jerusalem.org)

In some species, individuals contain both sets of organs, and these fish are called hermaphrodites. (aquariadise.com)
Earthworms, snails, slugs, and a few other species are hermaphrodites, meaning they have both male and female reproductive organs in the same body. (leverageedu.com)

Centipedes, despite their seemingly simple appearance, engage in intricate courtship rituals that vary among species. (insecta-inspecta.com)
In some species, centipedes engage in a delicate dance of touch and vibration. (insecta-inspecta.com)

According to Miralles and Vences (2013) Madascincus igneocaudatus should be restricted to their igneocaudatus-S clade, whereas the clade igneocaudatus-C represents also a new undescribed species. (reptarium.cz)

Males of the species have a gular flap that is generally thick, roundly shaped, not bilobed, and narrows anteriorly, which results in the overall shape being relatively hexagonal. (amphibiaweb.org)

There are over 500 species of shark described but even in 2023, we are still discovering new species. (rachelbrooksart.com)

These 14 are just a few of the dozens of species you might discover between the wrack line and the waves. (picasso-project.eu)

Each of these strategies has its own advantages and disadvantages, and the reproductive strategy of a particular species is often determined by its environment. (reptileszilla.com)
However, some species go against the norm in their reproductive strategies. (farmsteadly.com)

Hyperolius davenporti can be differentiated from other species within the genus through a few unique characteristics. (amphibiaweb.org)
To begin with, H. davenporti is the only species in its genus with black dermal asperities on its ventrum. (amphibiaweb.org)
Genus + Species (e.g. (mnhn.fr)

This new study, analyzing both fossil and living species, found that extended embryo retention (EER) in mothers, not egg-laying, gave these early creatures an evolutionary advantage. (scitechdaily.com)

Among mammals, the monotremes (four species of echidna, and the platypus) are oviparous. (wikipedia.org)
While mostly referring to nonmammalian species, this does include MAMMALS of the order MONOTREMATA. (jefferson.edu)

At the top of the ocean food chain they directly impact all other marine species below them, maintaining a balance in the ecosystem. (sharkguardian.org)
Some marine species, however, also use this technique. (leverageedu.com)

Many fishkeepers, especially betta enthusiasts, enjoy studying the genetics of a particular species and trying to create new and exciting variations of the fish. (aquariadise.com)

These results suggest that the current threshold value of -20% established by previous studies is invalid and should be avoided to ascertain the reproductive mode of aplacental viviparous species. (edu.au)

Some of these animals include the desert fox chinkara blackbuck and CaracalEven threatened species like the blackbuck great Indian bustard and Indian spiny-tailed lizard can still be found in the desert. (pages.dev)
Examples of livebearing species include guppies and platys. (aquariadise.com)

At 2,010 meters above sea level, this species has been documented to live in shallow ponds on the montane forest's edge and has never been seen in open areas. (amphibiaweb.org)
Which species of shark is known for its ability to swim through shallow waters and even walk on land? (triviasumo.com)

Some species were completely absent in the surveyed reefs, and where shark populations had significantly declined, ray species had increased - suggesting shifts across the entire reef system. (rachelbrooksart.com)

Home » Fish Species » Trout » How Does A Fish Mate? (fishyfeatures.com)

These species tend to swim faster than there similarly sized ectothermic counterparts. (rachelbrooksart.com)

But, when we look beyond our UK species, we find a wide diversity of reproductive modes. (froglife.org)
A bulk of species replicate by mating, which increases genetic diversity. (leverageedu.com)

This means that the species may be an "intermediate form" between egg-laying animals and species that give birth to live offspring, according to a recent study in Molecular Ecolog y. (happyeconews.com)
Three-toed skinks are one of the very few "bimodally reproductive" species we've ever found, animals in which some individuals lay eggs and others give birth to live offspring. (zmescience.com)

The results presented here offer an incontrovertible phylogenetic example of trait re-evolution, showing that mandibular teeth were lost in the ancestor of all living frogs and then re-evolved in the hemiphractid species G. guentheri . (blogspot.com)

The courtship dance helps identify potential mates and increase reproductive success by ensuring that individuals are only mating with members of their own species. (fishyfeatures.com)

The chimaeras are the smallest of these three divisions in terms of the number of extant species, and currently there are 57 species described [ 3 ] . (encyclopedia.pub)

A complex structure that re-evolves may need to be absent for tens of millions of years before its re-acquisition can be confidently distinguished from multiple losses (e.g., given typical diversification rates, this period of time may be needed for a group to diversify enough to have species nested deep in the phylogeny). (blogspot.com)
Etter L, Haas A, Lee CC, Pui YM, Das I, Hertwig ST. Out of the trap: A new phytothelm-breeding species of Philautus and an updated phylogeny of Bornean bush frogs (Anura: Rhacophoridae). (leibniz-lib.de)

The argument over whether Dollo's Law can be violated may primarily reflect the way we classify species and think about phylogenies. (blogspot.com)

Loader SP, Lawson LP, Portik DM, Menegon M 2015 Three new species of spiny throated reed frogs (Anura: Hyperoliidae) from evergreen forests of Tanzania. (amphibiaweb.org)

Their method is to divide the reproductive process into a set of eleven characters where each species can be assigned to one of two (occasionally more) states. (froglife.org)

The specificity of these chemical signals ensures that centipedes of the same species can effectively identify and interact with one another in their often dark and concealed habitats. (insecta-inspecta.com)
By identifying key habitats and breeding sites for each species, conservation efforts can be targeted towards protecting these areas from human encroachment or habitat destruction. (sustainable-jerusalem.org)

In these species, the single fused ovary releases eggs directly into the body cavity. (cloudfront.net)

For many species of fish, finding an appropriate mate can be challenging due to their relatively low population density and other environmental factors. (fishyfeatures.com)
Some species of fish have secondary reproductive organs called the genital papilla. (aquariadise.com)
Interestingly, it's often the male fish that carries out brooding duties, although, in some species, both the male and female fish play an equal role in raising the family. (aquariadise.com)
Some species of fish build a nest to keep their eggs safe and protected from predators until they hatch. (aquariadise.com)
This is a unique trait amongst fish, currently only recognised in as few as 0.1% of species. (rachelbrooksart.com)

Species delimitation methods put into taxonomic practice: two new Madascincus species formerly allocated to historical species names (Squamata, Scincidae). (reptarium.cz)

some species don't even reproduce every year. (sharksmart.com.au)

Some species may simply swim closely together or rub against one another, vocalize, or even change coloration patterns. (fishyfeatures.com)

In fact, chondrichthyan extinction risk is higher than for most other vertebrates, and only one-third of the species assessed are considered safe according to IUCN red list criteria [ 9 ] . (encyclopedia.pub)

Furthermore, conservation efforts must be prioritized to ensure the long-term survival of these remarkable reptilian species within the Jerusalem Forest. (sustainable-jerusalem.org)
This reproductive strategy contributes to the survival of the species and ensures their continued presence in our oceans. (aquaticanimalcamp.com)

Viviparity17

Ovoviviparity1

Reptiles7

Reproduction14

Lizards4

Shark species12

Sharks14

Embryos1

Boas3

Yolk4

Skink1

Externally3

Lecithotrophic1

Females3

Chondrichthyes2

Fishes1

Reptile species3

Behavior1

Hermaphrodites2

Engage2

Represents1

Males1

20231

Dozens of species1

Strategies2

Genus3

Embryo1

Mammals2

Marine species2

Particular species1

Viviparous species1

Include2

Shallow2

Populations1

Trout1

Tend1

Diversity2

Animals2

Evolution1

Courtship1

Chimaeras1

Phylogeny2

Phylogenies1

Frogs1

Process1

Habitats2

Single1

Fish5

Practice1

Reproduce1

Swim1

Vertebrates1

Survival2