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Biodiversity & Conservation

Reproductive Type

Definition
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).
Vegetative Development by somatic growth. Vegetative reproduction is, therefore, an asexual processes occurring as a result of fragmentation, division or budding from the parent organism.
Parthenogenesis A form of asexual multiplication in which the ovum develops into a new individual without fertilization (Barnes et al., 1993).
Self-fertilization Selfing or autogamy. Fertilization of a female gamete by a male gamete produced by the same individual.
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).
Permanent hermaphrodite Capable of producing both ova and spermatozoa either at the same time (Barnes et al., 1993).
Protandrous hermaphrodite A condition of hermaphroditism in plants and animals where male gametes mature and are shed before female gametes mature (Holmes, 1979).
Protogynous hermaphrodite A condition of hermaphroditism in plants and animals where female gametes mature and are shed before male gametes mature (Holmes 1979).
Gonochoristic (dioecious) Having separate sexes (Barnes et al., 1993).
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).
Gamete Type Isogamous Having gametes of similar size, shape and behaviour. (Lincoln et al., 1998).
Anisogamous Having flagellate gametes of different size, shape or behaviour (from Bold, 1977 and Lincoln et al., 1998).
Oogamous Having large, non-motile eggs and small motile sperm. Usually applied to algae (Lincoln et al., 1998).

References