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- oviparity
WordNet
- egg-laying
PrepTutorEJDIC
- (生物が)卵生の
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2015/07/04 16:58:07」(JST)
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Animal reproduction topics |
- Oviparity
- Viviparity
- Ovoviviparity
- False vivipary
- Live-bearing aquarium fish
- Trophic egg
- External fertilization
- Internal fertilization
- Animal sexual behavior
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Oviparous animals are animals that lay eggs, with little or no other embryonic development within the mother. This is the reproductive method of most fish, amphibians, reptiles, all birds, the monotremes, and most insects, molluscs, and arachnids.
Five modes of reproduction can be differentiated [1] based on relations between zygote and parents:
- Ovuliparity: fertilisation is external (in arthropods and fishes, most of frogs)
- Oviparity: fertilisation is internal, the female lays zygotes as eggs with important vitellus (typically birds)
- Ovo-viviparity: or oviparity with retention of zygotes in the female’s body or in the male’s body, but there are no trophic interactions between zygote and parents. (Anguis fragilis is an example of ovo-viviparity.) In the sea horse, zygotes are retained in the male’s ventral "marsupium". In the frog Rhinoderma darwinii, the zygotes developed in the vocal sac. In the frog Rheobatrachus, zygotes developed in the stomach.
- Histotrophic viviparity: the zygotes developed in the female’s oviducts, but find their nutriments by oophagy or adelphophagy (intra-uterine cannibalism in some sharks or in the black salamander Salamandra atra).
- Hemotrophic viviparity: nutriments are provided by the female, often through placenta. In the frog Gastrotheca ovifera, embryos are fed by the mother through specialized gills. The lizard Pseudomoia pagenstecheri and most mammals exhibit a hemotrophic viviparity.
Land-dwelling animals that lay eggs, often protected by a shell, such as reptiles and insects, do so after having completed the process of internal fertilization. Water-dwelling animals, such as fish and amphibians, lay their eggs before fertilization, and the male lays its sperm on top of the newly laid eggs in a process called external fertilization.
Almost all non-oviparous fish, amphibians and reptiles are ovoviviparous, i.e. the eggs are hatched inside the mother's body (or, in case of the sea horse inside the father's). The true opposite of oviparity is placental viviparity, employed by almost all mammals (the exceptions being marsupials and monotremes).
There are only five known species of oviparous mammals (monotremes): four species of Echidna, and the Platypus.
References
- ^ Thierry Lodé (2001). Les stratégies de reproduction des animaux (Reproduction Strategies in Animal Kingdom). Eds. Dunod Sciences. Paris.
External links
- Oviparity at the US National Library of Medicine Medical Subject Headings (MeSH)
Human physiology and endocrinology of sexual reproduction
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Menstrual and estrous cycle |
- Menarche
- Menstruation
- Follicular phase
- Ovulation
- Luteal phase
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Gametogenesis |
- Spermatogenesis (spermatogonium
- spermatocyte
- spermatid
- sperm)
- Oogenesis (oogonium
- oocyte
- ootid
- ovum)
- Germ cell (gonocyte
- gamete)
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Human sexual behavior |
- Sexual intercourse
- Masturbation
- Erection
- Orgasm
- Ejaculation
- Insemination
- Fertilisation/Fertility
- Implantation
- Pregnancy
- Postpartum period
- Mechanics of sex
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Life span |
- Prenatal development/Sexual dimorphism/Sexual differentiation (Feminization
- Virilization)
- Puberty (Gonadarche
- Pubarche
- Menarche
- Adrenarche)
- Maternal age / Paternal age
- Climacteric (Menopause
- Andropause)
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Egg |
- Ovum
- Oviposition
- Oviparity
- Ovoviviparity
- Vivipary
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Reproductive endocrinology
and infertility |
- Hypothalamic-pituitary-gonadal axis
- Andrology
- Hormone
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Breast |
- Thelarche
- Breast development
- Lactation
- Breastfeeding
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Index of reproductive medicine
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Description |
- Anatomy
- Physiology
- Development
- sex determination and differentiation
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Disease |
- Infections
- Congenital
- Neoplasms and cancer
- male
- female
- gonadal
- germ cell
- Other
- Symptoms and signs
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Treatment |
- Procedures
- Drugs
- benign prostatic hypertrophy
- erectile dysfunction and premature ejaculation
- sexual dysfunction
- infection
- hormones
- androgens
- estrogens
- progestogens
- GnRH
- prolactin
- Assisted reproduction
- Birth control
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Index of the breast
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Description |
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Disease |
- Congenital
- Neoplasms and cancer
- Other
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Treatment |
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English Journal
- Facultative oviparity in a viviparous skink ( Saiphos equalis).
- Laird MK, Thompson MB, Whittington CM.
- Biology letters. 2019 Apr;15(4)20180827.
- Facultative changes in parity mode (oviparity to viviparity and vice versa) are rare in vertebrates, yet offer fascinating opportunities to investigate the role of reproductive lability in parity mode evolution. Here, we report apparent facultative oviparity by a viviparous female of the bimodally r
- PMID 30940025
- Male parental assistance in embryo hatching of barred-chin blenny Rhabdoblennius nitidus.
- Sano K, Yokoyama R, Kitano T, Takegaki T, Kitazawa N, Kaneko T, Nishino Y, Yasumasu S, Kawaguchi M.
- Journal of experimental zoology. Part B, Molecular and developmental evolution. 2019 Apr;().
- Most teleostean embryos develop and hatch without parental assistance, though some receive parental care. We focused on a paternal brood-care species, the barred-chin blenny (Rhabdoblennius nitidus [Günther, 1861]). As hatching approached, fanning behavior by the male parent drastically increased a
- PMID 30964605
- A species-level phylogeny of Trachylepis (Scincidae: Mabuyinae) provides insight into their reproductive mode evolution.
- Weinell JL, Branch WR, Colston TJ, Jackman TR, Kuhn A, Conradie W, Bauer AM.
- Molecular phylogenetics and evolution. 2019 Apr;().
- Trachylepis (Mabuyinae) includes ∼80 species of fully-limbed skinks found primarily in Africa and Madagascar, but a robust species-level phylogeny for this genus is lacking and this impedes studies on a wide-range of topics from biogeography to character evolution. Trachylepis and its close relati
- PMID 30965125
Japanese Journal
- Posterior localization of ApVas1 positions the preformed germ plasm in the sexual oviparous pea aphid Acyrthosiphon pisum
- Biochemical and Immunochemical Characterization of Two Discrete Vitellogenin Proteins and Their Derived Lipovitellins in the Inshore Hagfish (Eptatretus burgeri)
- Two developmental switch points for the wing polymorphisms in the pea aphid Acyrthosiphon pisum
Related Links
- producing eggs that mature and hatch after being expelled from the body, as birds, most reptiles and fishes, and the monotremes. ... In one species, A. rhodostoma, the scales are smooth; and the female is oviparous and guards her ...
- oviparousとは。意味や和訳。[形]《動物》卵生の. - 40万項目以上収録、例文・コロケーションが豊富な無料英和和英辞典。 ... 音節 o • vip • a • rous 発音 ouvípərəs
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- 英
- oviparity、oviparous