external fertilization


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external fertilization

[ek¦stərn·əl ‚fərd·əl·ə′zā·shən]
(physiology)
Those processes involved in the union of male and female sex cells outside the body of the female.
References in periodicals archive ?
The ability of fucoid algae to couple a hydrodynamic sensing mechanism with gamete release has led to a high potential to synchronize the timing of gamete release, and consequently to enhance the success of external fertilization.
Consequences of surf-zone turbulence in settlement and external fertilization.
willmeriana, shows significantly lower viability in selfed relative to outcrossed matings, suggesting a low rate of inbreeding in nature likely due to external fertilization and perhaps enforced by inbreeding depression or a partial gametic incompatibility system.
Mitochondria are usually spherical in shape and their array as spherical masses on the proximal end of the spermatozoon head is also typical of species with external fertilization.
However, there are several barriers to reproduction that can act individually or together to restrict gene flow between sympatric species with external fertilization.
Kyozuka and Osanai, 1985), Spisula solidissima (Longo, 1973, 1976; Hylander and Summers, 1977), and Mytilus edulis (Longo and Anderson, 1969a), As with most broadcast spawners, species-specific binding of gametes is a critical aspect of external fertilization (Gould and Stephano, 2003).
2001) have assumed external fertilization and dispersal during the entire embryonic period.
We observed spawning; then external fertilization occurred; and the fertilized eggs developed into 8-armed ophioplutei, which metamorphosed into juveniles.
The majority of benthic marine invertebrates reproduce sexually via external fertilization.
Reproductive ecology of Fucus distichus Phaeophyceae): an intertidal alga with successful external fertilization.
Thus, external fertilization was an important consideration in our selection of the limpet Tectura testudinalis (Gastropoda: Patelloidea: Lottiidae) as a suitable model in which to study early events of fertilization.