関連する実験動画

Updated: Jul 12, 2026

Gamete Collection and In Vitro Fertilization of Astyanax mexicanus
10:52

Gamete Collection and In Vitro Fertilization of Astyanax mexicanus

Published on: May 25, 2019

卵性ヘルマフロディット魚は,内部の自己受精をします

R W Harrington

    Science (New York, N.Y.)
    |December 1, 1961
    PubMed
    まとめ

    自己受精する魚であるRivulus marmoratusは,様々な発達段階で卵を産む. この研究は,世代を超えて単独で繁殖する彼らの能力を確認し,すべての年齢の魚で機能的な卵巣を証明しています.

    さらに関連する動画

    Basic Methods for the Study of Reproductive Ecology of Fish in Aquaria07:25

    Basic Methods for the Study of Reproductive Ecology of Fish in Aquaria

    Published on: July 20, 2017

    Making Gynogenetic Diploid Zebrafish by Early Pressure12:40

    Making Gynogenetic Diploid Zebrafish by Early Pressure

    Published on: June 30, 2009

    関連する概念動画

    Fertilization01:38

    Fertilization

    During fertilization, an egg and sperm cell fuse to create a new diploid structure. In humans, the process occurs once the egg has been released from the ovary, and travels into the fallopian tubes. The process requires several key steps: 1) sperm present in the genital tract must locate the egg; 2) once there, sperm need to release enzymes to help them burrow through the protective zona pellucida of the egg; and 3) the membranes of a single sperm cell and egg must fuse, with the sperm...
    Fixed Action Patterns01:06

    Fixed Action Patterns

    A fixed action pattern (FAP) is a specific, hard-wired sequence of behaviors that occurs in response to an external stimulus, called a sign stimulus. The behavior is “fixed” because it is essentially unchangeable—proceeding similarly across individuals of a species every time it occurs.
    Osmoregulation in Fishes02:32

    Osmoregulation in Fishes

    When cells are placed in a hypotonic (low-salt) fluid, they can swell and burst. Meanwhile, cells in a hypertonic solution—with a higher salt concentration—can shrivel and die. How do fish cells avoid these gruesome fates in hypotonic freshwater or hypertonic seawater environments?
    Parental Care00:55

    Parental Care

    Many animals exhibit parental care behavior, including feeding, grooming, and protecting young offspring. Parental care is universal in mammals and birds, which often have young that are born relatively helpless. Several species of insects and fish, as well as some amphibians, also care for their young.
    Oogenesis02:07

    Oogenesis

    In human women, oogenesis produces one mature egg cell or ovum for every precursor cell that enters meiosis. This process differs in two unique ways from the equivalent procedure of spermatogenesis in males. First, meiotic divisions during oogenesis are asymmetric, meaning that a large oocyte (containing most of the cytoplasm) and minor polar body are produced as a result of meiosis I, and again following meiosis II. Since only oocytes will go on to form embryos if fertilized, this unequal...
    Understanding Species and Reproductive Barriers01:17

    Understanding Species and Reproductive Barriers

    A species is a group of organisms that interbreed and produce fertile offspring. Typically, individuals of the same species appear similar and share common characteristics due to their highly similar genomes. However, not all organisms that look alike are members of the same species. Various mechanisms keep most species discrete. While some mechanisms prevent reproductive behavior and fertilization (pre-zygotic isolation), others prevent the production of fertile offspring after mating has...