EE BIOL 109 Lecture Notes - Lecture 15: Allogamy, Reproduction, Asexual Reproduction
31 Dec 2017
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Lecture 15 - reproduction, dispersal, recruitment reproductive modes. Mating: sexual (unites gametes -> zygote, asexual (no gamete/zygote formation) -> genetic clone of parent. Allogamy gametes from 2 different individuals: gametes from 2 different individuals, gonochoristic (sep m/f, sequential hermaphrodites, protandry (m->f, protogyny (f->m, non-selfing hermaphordites. Autogamy gametes from same individual: true hermaphrodites. Types: budding, fragmentation, parthenogenesis (usually reproduce sexually but participate in asexual when no partner is available) Increase spawning density -> increase fertilization success at low or high population size. Getting right sperm and eggs to meet, avoid interspecific fertilization. Bindin on sperm activates egg receptor only if they are the same species (species specific fertilization: evolve together, only when gametes are from same species, the sperm will be transported thru coat to the egg. Coordinated gamete release to ensure high density of both gametes of specific species are in the water column at the same time. Increased fertilization specificity thru synchronous spawning, increasing turbulence.
