Intra-sexual selection
... Why is there so much variation in mating systems and parental care? • Solitary species • Monogamous species • Polygynous species with 1 male, > 1 female • Polygynous species with >1 male, > 1 female • No parental care • Bi-parental care • Male parental care only • Female parental care only ...
... Why is there so much variation in mating systems and parental care? • Solitary species • Monogamous species • Polygynous species with 1 male, > 1 female • Polygynous species with >1 male, > 1 female • No parental care • Bi-parental care • Male parental care only • Female parental care only ...
EVOLUTION, SEXUAL REPRODUCTION, SEXUAL DIMORPHISM,
... 1. Intrasexual selection 2. Intersexual selection 3. Post-mating selection ...
... 1. Intrasexual selection 2. Intersexual selection 3. Post-mating selection ...
Worms!
... females reproductive tracts, and inject sperm into them Sperm do not have flagellae, it uses pseudopodia to move ...
... females reproductive tracts, and inject sperm into them Sperm do not have flagellae, it uses pseudopodia to move ...
Frog Reproduction
... Describe the changes that occur during metamorphosis. Identify two examples of parental care in frogs. ...
... Describe the changes that occur during metamorphosis. Identify two examples of parental care in frogs. ...
www.saczoo.com
... short distances within their own territory. They hold their heads up high on their necks to display their prominent horns even while basking in the sun on rocks. Rhino iguanas are extremely territorial and use their long tails to slash and whip at predators or intruders. Although territorial battles ...
... short distances within their own territory. They hold their heads up high on their necks to display their prominent horns even while basking in the sun on rocks. Rhino iguanas are extremely territorial and use their long tails to slash and whip at predators or intruders. Although territorial battles ...
File - Mrs. LeCompte
... Polygamous = when a single male mates with multiple females o Due to gestation and lactation periods, females invest more time energy in their offspring than males o Grouping together to help each other forage for food is beneficial for females o Males defend the group from other males Polyandro ...
... Polygamous = when a single male mates with multiple females o Due to gestation and lactation periods, females invest more time energy in their offspring than males o Grouping together to help each other forage for food is beneficial for females o Males defend the group from other males Polyandro ...
Eisenia veneta - St. Olaf Pages
... begins to produce winged males and females to mate and start colonies of their own. ...
... begins to produce winged males and females to mate and start colonies of their own. ...
10-Sociality
... Protogyny—> Evolution of Sex —> Anisogamy Diploidy as a “fail-safe” mechanism Costs of Sexual Reproduction (halves heritability!) Facultative Sexuality (Ursula LeGuin -- Left Hand of Darkness) Protandry -- Protogyny (Social control) Parthenogenesis (unisexual species) Possible advantages of sexual r ...
... Protogyny—> Evolution of Sex —> Anisogamy Diploidy as a “fail-safe” mechanism Costs of Sexual Reproduction (halves heritability!) Facultative Sexuality (Ursula LeGuin -- Left Hand of Darkness) Protandry -- Protogyny (Social control) Parthenogenesis (unisexual species) Possible advantages of sexual r ...
Animal Behavior - Phillips Scientific Methods
... Mating Systems • Promiscuous – no mating bonds • Monogamous – strong bond forms one male one female for a long period • Polygamous – one sex mates with others ...
... Mating Systems • Promiscuous – no mating bonds • Monogamous – strong bond forms one male one female for a long period • Polygamous – one sex mates with others ...
Monkey, red tailed guenon 2.15 - The Maryland Zoo in Baltimore
... • Store food in cheek pouches and move away from group to eat to avoid theft by other monkeys Social Structure • Red-tailed guenons live together in family groups ranging from about 7 to 35 individuals o One adult male and several females and juveniles • Groups feed together during the day and sleep ...
... • Store food in cheek pouches and move away from group to eat to avoid theft by other monkeys Social Structure • Red-tailed guenons live together in family groups ranging from about 7 to 35 individuals o One adult male and several females and juveniles • Groups feed together during the day and sleep ...
breeding systems and reproductive strategies of mammals
... • Description of mating behavior and parental care by both sexes • Parental care & potential rate of reproduction of each sex • If males contribute no parental care (many mammals), they have high potential rate of reproduction; fitness limited by access to females; males most competitive sex ...
... • Description of mating behavior and parental care by both sexes • Parental care & potential rate of reproduction of each sex • If males contribute no parental care (many mammals), they have high potential rate of reproduction; fitness limited by access to females; males most competitive sex ...
Animal Nomenclature Power Point
... Animal Nomenclature By the end of the lesson the student will be able to identify the species of animal and common names of farm animals. ...
... Animal Nomenclature By the end of the lesson the student will be able to identify the species of animal and common names of farm animals. ...
KIRKCALDY AQUARIST SOCIETY INFORMATION SHEET
... planted tank it can be successfully flock-bred, but if serious breeding is envisaged then gravid females should be placed in a specially prepared breeding tank to ensure a high percentage of fry survival. Brood can average from 12 to 30 although I have had mature females produce in excess of 50 fry. ...
... planted tank it can be successfully flock-bred, but if serious breeding is envisaged then gravid females should be placed in a specially prepared breeding tank to ensure a high percentage of fry survival. Brood can average from 12 to 30 although I have had mature females produce in excess of 50 fry. ...
Outline of: Bryja, J., Patzenhauerova, H., Albrecht, T., Mosansky, L
... 1. One of our major concerns with the results of this study were the small sample sizes used to collect the data. The largest sample size was 46 litters for one of the sub-species. Yet one of the sub-species only had 22 litters total for testing. We do not believe that either of these are large enou ...
... 1. One of our major concerns with the results of this study were the small sample sizes used to collect the data. The largest sample size was 46 litters for one of the sub-species. Yet one of the sub-species only had 22 litters total for testing. We do not believe that either of these are large enou ...
Male Mexican mollies grow mustaches to attract mates
... to female mollies and may represent a sexually Professor Schlupp suspects it may also be used selected trait. physically to excite the female or pass on tactile information by rubbing it against the genitals, since The Mexican molly fish (Poecilia sphenops) is a a male will often "nip" the genital a ...
... to female mollies and may represent a sexually Professor Schlupp suspects it may also be used selected trait. physically to excite the female or pass on tactile information by rubbing it against the genitals, since The Mexican molly fish (Poecilia sphenops) is a a male will often "nip" the genital a ...
Reproduction and Development
... External fertilization: release of gametes into the surrounding environment Requirement: timing! ensure sperm encounters eggs Internal fertilization: Sperm is deposited in or near the female reproductive tract and fertilization occurs in it Requirement: cooperative behavior between male and female s ...
... External fertilization: release of gametes into the surrounding environment Requirement: timing! ensure sperm encounters eggs Internal fertilization: Sperm is deposited in or near the female reproductive tract and fertilization occurs in it Requirement: cooperative behavior between male and female s ...
Effect of extra prenatal testosterone on rabbit offspring at birth
... body weight (BW), litter size, and sex ratio. To avoid possible seasonal (sequential) effect, all of these measures were compared to the given does’ previous litters. As a result, male offspring had longer AGD, both in the low, and the high testosterone groups. However, sesame-oil alone also had som ...
... body weight (BW), litter size, and sex ratio. To avoid possible seasonal (sequential) effect, all of these measures were compared to the given does’ previous litters. As a result, male offspring had longer AGD, both in the low, and the high testosterone groups. However, sesame-oil alone also had som ...
File - Mr. Shanks` Class
... Bright coloured feathers of a male peacock is attractive for females but easy for predators to see A very successful male elephant seal may mate with dozens of females each year and hundreds of females in his lifetime, while a weak male may live a longer life but produce no offspring. In this case, ...
... Bright coloured feathers of a male peacock is attractive for females but easy for predators to see A very successful male elephant seal may mate with dozens of females each year and hundreds of females in his lifetime, while a weak male may live a longer life but produce no offspring. In this case, ...
Untitled - Knowsley Safari Park
... Adult females are big, heavy and do not have large wings, so therefore cannot fly. The males are long and slender and have very long wings that reach past the abdomen, which means they are capable of flight. Like most stick insects this species is docile by nature. It is nocturnal and will generally ...
... Adult females are big, heavy and do not have large wings, so therefore cannot fly. The males are long and slender and have very long wings that reach past the abdomen, which means they are capable of flight. Like most stick insects this species is docile by nature. It is nocturnal and will generally ...
Patterns of sexual dimorphism in Mexican alligator lizards, Barisia
... smaller average litter sizes (7 vs. 16 in this study) and a lower range of SVL (78–125 mm vs. 103–136 mm in this study). The differences between the two studies suggest geographic variation in female reproductive traits. In conclusion, natural selection for increased body size in females (due to inc ...
... smaller average litter sizes (7 vs. 16 in this study) and a lower range of SVL (78–125 mm vs. 103–136 mm in this study). The differences between the two studies suggest geographic variation in female reproductive traits. In conclusion, natural selection for increased body size in females (due to inc ...
In the Wild - The Maryland Zoo in Baltimore
... o Adult males hiss during aggressive encounters and during courtship and mating o Females and late-stage nymphs hiss only when disturbed or threatened o Hiss is their defense against predators o Hiss can be heard up to 12 feet away Males have “horns” (females may also, but much less pronounced) o Ca ...
... o Adult males hiss during aggressive encounters and during courtship and mating o Females and late-stage nymphs hiss only when disturbed or threatened o Hiss is their defense against predators o Hiss can be heard up to 12 feet away Males have “horns” (females may also, but much less pronounced) o Ca ...
