Chapter+12

Discussion and questions about chapter 12

Radiolab- Why so many sperm? Matthew Cobb takes us back to 1677, when Anton Van Leewenhoek first identified sperm and there was much talk of souls and miniature men residing in the seminal fluid. Upon observation it became clear that there were an awful lot of those little guys that never turned into babies! Jad wonders: why so many sperm? Bird-sex specialist Tim Birkhead, of the University of Sheffield, explains what effect imperfect monogamy has on reproductive strategies. Then sperm physiologistJoanna Ellington and her pig Hazel give us some insight into the obstacles sperm must overcome in their odyssey from their male originator to their female destination. media type="custom" key="10226115"

-different systems - how do they in reproductive success? || - Different strategies - Hoe do they lead to reproductive success? || -what are the strategies? -how do they lead to reproductive success? || - What are the strategies? - How do they lead to reproductive success? || Apply what you have read so far here || Patterns and times of breeding || Med- How do other reproductive strategies apply here? || - What strategies are used? - How is reproductive success increased? - Which are R/K selected? ||
 * Chapter 12: Reproductive strategies for survival**
 * Page || Title || Summary/Main concepts ||
 * 374-376 || Sex at sea || Med- ||
 * 377 || A range of reproductive strategies || Long- learn all of this!!! ||
 * 377-381 || Mating systems || Med-long
 * 381- 383 || Offspring: How many? How often? || Med-long
 * 383-387 || Eggs or liveborn young? || Med-
 * 388-390 || Parental care or not || Med-
 * 391-393 || Reproductive strategies: Australian marsupials || Med-
 * 393-395 || How often do matings occur?
 * 395-400 || Plant reproduction || Med-

Glossary:

Broadcast spawning Zooplankton Asexual Sexual Hermaphrodite Parthenogenesis External/ internal fertilisation Monogamy Polygamy Polyandry Promiscuity r-selection K-selection Oviparity Viviparity Parental investment Extra pair copulation Lekking Fecundity Sperm competition Mate guarding Copulation Amniote eggs Placenta Plancental mammal Marsupial Oestrous cycle Pollination Vectors Dispersal