Reproductive type
| Trait | Definition |
|---|---|
| Asexual | 1) Reproduction not involving the exchange of genetic matererial, amictic, individuals derived from a single parent (Barnes et al., 1993). 2) Reproduction not involving the fusion of gametes (Lincoln et al., 1998). |
| Vegetative | An asexual processes occurring as a result of fragmentation, division or budding from the parent organism (see Lincoln et al., 1998). Development by somatic growth (see Bold, 1977). |
| Budding | A form of asexual multiplication in which a new individual begins life as an outgrowth from the body of the parent. It may then separate to lead an independent existence or remain connected or otherwise associated to form a colonial organism (Barnes et al., 1993). |
| Fission | A form of asexual multiplication involving division of the body into two or more parts each or all of which can grow into new individuals (Barnes et al., 1993). |
| Apomictic parthenogenesis | 1) Reproduction via single cells or eggs that are derived by mitosis; amictic (Barnes et al., 1993). 2) Parthenogenesis in which meiosis is suppressed so that neither chromosome reduction nor corresponding phenomenon occurs (Lincoln et al., 1998). |
| Sexual | 1) Reproduction involving the regular alternation of gamete formation by meiosis, and gamete fusion (karyogamy) to form a zygote (Lincoln et al.,1998). 2) Reproduction where recombination of genetic material, derived from more than one parent is possible (Barnes et al., 1993). |
| Hermaphrodite (monoecious) | Both male and female reproductive organs in a single individual (animals) or flower (plants) (Lincoln et al., 1998). |
| Permanent (synchronous) hermaphrodite | Capable of producing both ova and spermatozoa either at the same time (Barnes et al., 1993). |
| Self-fertilizing | Union of male and female gametes produced by the same individual (Lincoln et al., 1998). |
| Non-selfing | Incapable of self-fertilization, due to physical or temporal separation of gametes, and / or self-compatability genes. |
| Automictic parthenogenesis | Obligate self-fertilization (Lincoln et al., 1998) in which haploid eggs or gametes are produced by meiosis but diploidy is restored without fertilization (but sometimes with insemination). |
| Sequential hermaphrodite | Consecutive hermaphrodite (Lincoln et al., 1998) - in which one type of gamete (male or female) is produced before the other. |
| Protandrous hermaphrodite | Hermaphroditism in plants and animals where male gametes mature and are shed before female gametes mature (Holmes, 1979). |
| Protogynous hermaphrodite | Hermaphroditism in plants and animals where female gametes mature and are shed before male gametes mature (Holmes, 1979). |
| Gonochoristic (dioecious) | Having separate sexes or genders (Barnes et al., 1993). |
| Arrhenotoky | Haploid males develop from unfertilized eggs |
| Pseudo-arrhenotoky | Males develop from diploid fertilized eggs but subsequently eliminate orsilence the paternal genome |
| Alternation of generations | The alternation of generations, in the life cycle of an organism, that exhibit different modes of reproduction; typically sexual (diploid) and asexual (haploid) phases. Also termed metagenesis (Lincoln et al., 1998). (e.g. Daphnia, some rotifers). |
| Sporogenesis | Reproduction via spores |
References
Barnes, R.S.K., Calow, P. & Olive, P.J.W., 1993. The invertebrates: a new synthesis. Oxford: Blackwell Science Ltd.
Bold, H.C., 1977. The Plant Kingdom (4th ed.). New Jersey: Prentice-Hall Inc.
Holmes, S., 1979. Henderson’s dictionary of biological terms. 9th ed. London: Hendersons.
Lincoln, R., Boxshall, G. & Clark, P., 1998. A dictionary of ecology, evolution and systematics (2nd ed.). Cambridge: Cambridge University Press.