EEB267H1 Lecture Notes - Lecture 8: Guppy, Matrotrophy, Viviparity
31 Jan 2017
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Document Summary
Males able to sing via gas bladder to females during copulation. Most fishes (about 98%); most species of ray-finned fishes. Eggs and sperm released in water, fertilization takes place there. Some species via anal fin modified for sperm transfer. Modified anal fin rays to form a long structure to transfer sperm into female. If it does occur, it is because the offspring requires both the mother and father. Polygamy: ploys [many] + gamos [marriage, many mates during one breeding season; 4 general types of polygamy, promiscuity: Simultaneous mass spawning (e. g. , herring, many minnows) No lasting bonds between males and females; no obvious mate choice happening. Female ovulates and spawns eggs, males fertilize all the eggs released: polygyny: Male"s territory encompasses many females" territory, and is. Responsible for them, patrolling boundaries ceaselessly to keep other males away from their harem; will spawn with them. Males form long term bonds with each female: polyandry:
