PPT-Mating Systems

Laksmis Cornejo Sara Nishikawa Shannon Oki Emlen ST Oring LW 1977 Ecology Sexual Selection and the Evolution of Mating Systems Science 197 215223 Hypotheses Certain ecological factors determine the degree to which mates can . (Falconer & Mackay: chapter 10). Sanja Franic. VU University . Amsterdam 2012. ‘like with like’. reflected in a phenotypic correlation between mated individuals. mating in human populations is assortative with respect to many characteristics, such as stature and IQ. By Tim Revell. Life Cycle of an Animal. Another one….. Decision?. Honest Signals?. Who gets to choose??. Robert . Trivers. Parental investment . = higher, the more “choosier” . sex. The other hypothesis?. , Imprinting and Aggression). Various behaviors controlled by hormones, . neurohormones. and/or biogenic amines in insects and the various chemicals used by the insect. Mating . Migration . and dispersal. Can humans be shown to mate in a manner consistent with the hypotheses surrounding mate choice by either perception of genetic quality or of ability to provide resources?. Central Question. 1. Female investment in offspring – very high. 1 MONOGAMY Some males in a population regularly have two or more matesIn North America, 14 of 278 breeding so 2 Predictions of the PolygynyThreshold model: 1) A male's territory quality will be correl 1 MONOGAMY Some males in a population regularly have two or more matesIn North America, 14 of 278 breeding so 2 Predictions of the PolygynyThreshold model: 1) A male's territory quality will be correl The common cuttlefish. A Brief History of the Cuttlefish. The first person to describe the cuttlefish on record was Linnaeus in 1758.. His records are kept in the Linnaean Society of London. Cuttlefish Reproduction and Life Cycle. Ectotherms. - . Herpetology. http://www.amphibian.com.au/. How does “sexy” and “macho” relate to fitness. ?. Darwin’s contribution…. Types of selection…. Mating systems and sexual selection. Life Cycle of an Animal. Another one….. Decision?. Honest Signals?. Who gets to choose??. Robert . Trivers. Parental investment . = higher, the more “choosier” . sex. The other hypothesis?. Sex Ratio . By Daniel Nettle and Helen Clegg. Presented by Grant and Brooke. Schizophrenia. 1% of the population across cultures. Heritable. Drastically reduced reproduction. Puzzle. Too frequent to be a mutation. Evolutionary Psychology. Spring . 2020. Dr Chapman. 1. Context Effects of Men. ’. s Mating Behavior. Men in positions of power. Viewing attractive models. Testosterone levels. The Necessities and Luxuries of Mate Preferences. Dr V.P.Saini. Prof. & Dean. College of Fisheries, Kishanganj. Designing mating strategies to maximize N. e. (effective breeding population) is most useful if the hatchery manager can control breeding to some degree, usually through application of PIT tags, induced spawning, . Chuanyu Sun. 1. , Paul M. VanRaden. 2. , Jeff R. O'Connell. 3. 1 . National Association of Animal Breeders, USA, Columbia, MO;. 2 . Animal Improvement Programs Laboratory, Agricultural Research Service, USDA, Beltsville, MD, USA. . MATING IN FROGS. In almost all frogs , eggs fertilization happens outside the females body instead of inside.. The female releases her eggs and male releases his sperms at the same time . In order to make sure that the sperms reach the eggs ,the male and female get into the mating posture called .