Mating behaviors include attracting mates, competing for mates, and caring for offspring. Mating systems describe the way in which mating and sexual behavior is structured. Two examples of this are monogamy and polygamy. You can see an example of monogamy right here with these albatrosses, where one male mates with one female and they stick together. Polygamy, on the other hand, is when an individual of one sex will mate with many individuals of the opposite sex, and this can go both ways. This could be a male mating with many females, or a female mating with many males. Now, sexual selection is the type of natural selection in which members of one sex choose mates. This can involve one sex choosing a mate of the opposite sex. For example, what you see here in this mating display put on by this bird of paradise where this very plain-looking female is basically going to see whether or not she's impressed with this dude's performance, and choose whether or not she wants to mate with him. Now, this can also take the form of competition between members of the same sex. For example, rams, you know, which will smash heads to compete for who gets to mate. Now, females tend to choose their mates when they are the ones doing the choosing, based on signs of fitness and health. Now, even though this bird's dance and its feathers might not seem like obvious signs of fitness and health, the plumage color and its ability to perform those types of precise movements can actually be indicators, in an indirect sense, of this animal's health and fitness. Now, mate choice copying is an interesting phenomenon seen sometimes, where individuals in a population are more likely to mate with an individual who has previously mated. So, for example, you'll see this in certain species like guppies, where if a female witnesses a male mate with another female, that female that watched them, although it might sound kind of creepy, is going to then be more likely to mate with that male, and that is an example of mate choice copying. Now, parental care is important because it can help improve the chances of raising viable offspring. Males actually will tend to help with parental care in species that require a lot of attention and help feeding. The certainty of paternity, that is, how certain the male is that those offspring are his offspring, seems to have an effect on male parental care. And you'll actually see higher rates of male parental care in species with external fertilization because the males, it's thought, have a greater certainty of paternity because they'll go right up to the eggs and fertilize them right there. As opposed to internal fertilization where some other organism could have internally fertilized this organism, and it could be its offspring, you just, it's harder to know. So here you see an example of some parental care where these little chicks, kind of gross-looking chicks, to be honest, are going to get fed by the parent here. And of course, here you can see a wonderful example of human parental care, which is paternal care. Alright. Let's flip the page.
Table of contents
- 1. Introduction to Biology2h 40m
- 2. Chemistry3h 40m
- 3. Water1h 26m
- 4. Biomolecules2h 23m
- 5. Cell Components2h 26m
- 6. The Membrane2h 31m
- 7. Energy and Metabolism2h 0m
- 8. Respiration2h 40m
- 9. Photosynthesis2h 49m
- 10. Cell Signaling59m
- 11. Cell Division2h 47m
- 12. Meiosis2h 0m
- 13. Mendelian Genetics4h 41m
- Introduction to Mendel's Experiments7m
- Genotype vs. Phenotype17m
- Punnett Squares13m
- Mendel's Experiments26m
- Mendel's Laws18m
- Monohybrid Crosses16m
- Test Crosses14m
- Dihybrid Crosses20m
- Punnett Square Probability26m
- Incomplete Dominance vs. Codominance20m
- Epistasis7m
- Non-Mendelian Genetics12m
- Pedigrees6m
- Autosomal Inheritance21m
- Sex-Linked Inheritance43m
- X-Inactivation9m
- 14. DNA Synthesis2h 27m
- 15. Gene Expression3h 20m
- 16. Regulation of Expression3h 31m
- Introduction to Regulation of Gene Expression13m
- Prokaryotic Gene Regulation via Operons27m
- The Lac Operon21m
- Glucose's Impact on Lac Operon25m
- The Trp Operon20m
- Review of the Lac Operon & Trp Operon11m
- Introduction to Eukaryotic Gene Regulation9m
- Eukaryotic Chromatin Modifications16m
- Eukaryotic Transcriptional Control22m
- Eukaryotic Post-Transcriptional Regulation28m
- Eukaryotic Post-Translational Regulation13m
- 17. Viruses37m
- 18. Biotechnology2h 58m
- 19. Genomics17m
- 20. Development1h 5m
- 21. Evolution3h 1m
- 22. Evolution of Populations3h 52m
- 23. Speciation1h 37m
- 24. History of Life on Earth2h 6m
- 25. Phylogeny40m
- 26. Prokaryotes4h 59m
- 27. Protists1h 6m
- 28. Plants1h 22m
- 29. Fungi36m
- 30. Overview of Animals34m
- 31. Invertebrates1h 2m
- 32. Vertebrates50m
- 33. Plant Anatomy1h 3m
- 34. Vascular Plant Transport2m
- 35. Soil37m
- 36. Plant Reproduction47m
- 37. Plant Sensation and Response1h 9m
- 38. Animal Form and Function1h 19m
- 39. Digestive System10m
- 40. Circulatory System1h 57m
- 41. Immune System1h 12m
- 42. Osmoregulation and Excretion50m
- 43. Endocrine System4m
- 44. Animal Reproduction2m
- 45. Nervous System55m
- 46. Sensory Systems46m
- 47. Muscle Systems23m
- 48. Ecology3h 11m
- Introduction to Ecology20m
- Biogeography14m
- Earth's Climate Patterns50m
- Introduction to Terrestrial Biomes10m
- Terrestrial Biomes: Near Equator13m
- Terrestrial Biomes: Temperate Regions10m
- Terrestrial Biomes: Northern Regions15m
- Introduction to Aquatic Biomes27m
- Freshwater Aquatic Biomes14m
- Marine Aquatic Biomes13m
- 49. Animal Behavior28m
- 50. Population Ecology3h 41m
- Introduction to Population Ecology28m
- Population Sampling Methods23m
- Life History12m
- Population Demography17m
- Factors Limiting Population Growth14m
- Introduction to Population Growth Models22m
- Linear Population Growth6m
- Exponential Population Growth29m
- Logistic Population Growth32m
- r/K Selection10m
- The Human Population22m
- 51. Community Ecology2h 46m
- Introduction to Community Ecology2m
- Introduction to Community Interactions9m
- Community Interactions: Competition (-/-)38m
- Community Interactions: Exploitation (+/-)23m
- Community Interactions: Mutualism (+/+) & Commensalism (+/0)9m
- Community Structure35m
- Community Dynamics26m
- Geographic Impact on Communities21m
- 52. Ecosystems2h 36m
- 53. Conservation Biology24m
49. Animal Behavior
Animal Behavior
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