Color and Communication in Habronattus Jumping Spiders: Tests of
... facial coloration improves courtship success, but only if males are courting in the sun. Because light environment affects transmission of color signals, the multicolored displays of males may facilitate communication in variable and unpredictable environments. Because these colors can be costly to ...
... facial coloration improves courtship success, but only if males are courting in the sun. Because light environment affects transmission of color signals, the multicolored displays of males may facilitate communication in variable and unpredictable environments. Because these colors can be costly to ...
A Comparison of the Physical Development and Ontogeny of
... interspecific differences in the distribution of social, locomotory, ingestive, and digging behaviours, but no significant differences in grooming and investigatory behaviours over the 28 day sampling period. Behavioural differences were more reflective of adaptive responses to environmental conditi ...
... interspecific differences in the distribution of social, locomotory, ingestive, and digging behaviours, but no significant differences in grooming and investigatory behaviours over the 28 day sampling period. Behavioural differences were more reflective of adaptive responses to environmental conditi ...
Common Clownfish Amphiprion ocellaris
... Reproduction: Common Clownfish are protandrous hermaphrodites, meaning that all clownfish are born with active male reproductive organs as well as dormant female reproductive organs. If a female dies, the dominant male in the hierarchy will change into a female, and a secondary male will become the ...
... Reproduction: Common Clownfish are protandrous hermaphrodites, meaning that all clownfish are born with active male reproductive organs as well as dormant female reproductive organs. If a female dies, the dominant male in the hierarchy will change into a female, and a secondary male will become the ...
The evolution of non-maternal caretaking among anthropoid
... abuse undoubtedly represents an important cost to mothers in many cases (Silk 1980; Maestripieri 1994), the benefits obtained via allocaretaking may outweigh these costs in certain situations. By providing relief from parental duties, non-maternal care may permit mothers to adjust their efforts to p ...
... abuse undoubtedly represents an important cost to mothers in many cases (Silk 1980; Maestripieri 1994), the benefits obtained via allocaretaking may outweigh these costs in certain situations. By providing relief from parental duties, non-maternal care may permit mothers to adjust their efforts to p ...
Document
... Egg begins development without sperm Narrows the diversity available for adaptation to new conditions - not clones of female (haploid cells replicate) Examples: fleas, bees, aphids, some fish and lizards ...
... Egg begins development without sperm Narrows the diversity available for adaptation to new conditions - not clones of female (haploid cells replicate) Examples: fleas, bees, aphids, some fish and lizards ...
132 Florida Entomologist 80(2)
... is a function of the receiver’s visual system, and the intensity, hue, saturation, and degree of contrast between different patches on the animal and its environment. What may be described as bright when seen out of context by humans may actually be cryptic in its environment. Many bright green irid ...
... is a function of the receiver’s visual system, and the intensity, hue, saturation, and degree of contrast between different patches on the animal and its environment. What may be described as bright when seen out of context by humans may actually be cryptic in its environment. Many bright green irid ...
insects and freshwater fish
... There are several different stick insects on Tiritiri Matangi but they are so well camouflaged that you will be lucky to see any, and the fact that they are usually only active at night makes it even more difficult. Stick insects can be brown, green or grey, and their bodies can be smooth or prickl ...
... There are several different stick insects on Tiritiri Matangi but they are so well camouflaged that you will be lucky to see any, and the fact that they are usually only active at night makes it even more difficult. Stick insects can be brown, green or grey, and their bodies can be smooth or prickl ...
Ecology and Reproductive Characteristics of the Skink
... and Adler 1993), off the southeastern coast of Taiwan. For most tropical oviparous lizards, both males and females seem to exhibit year-round gonadogenesis, with subsequent courtship, mating, and oviposition (Fitch 1970, Huang 2006a b), but some in the seasonal tropics are known to show seasonal cyc ...
... and Adler 1993), off the southeastern coast of Taiwan. For most tropical oviparous lizards, both males and females seem to exhibit year-round gonadogenesis, with subsequent courtship, mating, and oviposition (Fitch 1970, Huang 2006a b), but some in the seasonal tropics are known to show seasonal cyc ...
III *** A unique evolutionary trajectory 1\\
... Homo) is now considered to be a largely African event: biomolecular studies show that humans are closer to African apes than to Asian apes (fig. 7-1). There are good reasons to suppose that the evolution of hominids was put in motion by climatological changes that started to make the forests smaller ...
... Homo) is now considered to be a largely African event: biomolecular studies show that humans are closer to African apes than to Asian apes (fig. 7-1). There are good reasons to suppose that the evolution of hominids was put in motion by climatological changes that started to make the forests smaller ...
Trait selection in flowering plants: how does sexual selection
... Here, we review a handful of studies that have investigated how traits that affect pollinator visitation can be considered as being under sexual selection via either male or female function (see Table 1 for an overview). We chose these studies because they investigated male and female function using ...
... Here, we review a handful of studies that have investigated how traits that affect pollinator visitation can be considered as being under sexual selection via either male or female function (see Table 1 for an overview). We chose these studies because they investigated male and female function using ...
The love-darts of land snails: integrating physiology, morphology
... elaborate penial spines had a thicker connective tissue layer in the vagina, which has been proposed as a counter-adaptation to protect them from injury. In the context of sexual selection, simultaneous hermaphrodites have been relatively neglected because it was long supposed that sexual selection ...
... elaborate penial spines had a thicker connective tissue layer in the vagina, which has been proposed as a counter-adaptation to protect them from injury. In the context of sexual selection, simultaneous hermaphrodites have been relatively neglected because it was long supposed that sexual selection ...
Sample Responses Q1 - AP Central
... (b) Choose one organism or group of organism the reproduce asexually. Describe the mode of asexual reproduction in that organism and explain the advantages to the organism of asexual reproduction. (3 points maximum) • One point for correct organism or group of organisms that produce asexually • One ...
... (b) Choose one organism or group of organism the reproduce asexually. Describe the mode of asexual reproduction in that organism and explain the advantages to the organism of asexual reproduction. (3 points maximum) • One point for correct organism or group of organisms that produce asexually • One ...
Reproduction in Organisms
... Q. 2. Which is a better mode of reproduction: sexual or asexual? Why? Ans. Sexual reproduction is considered a better mode as it gives rise to genetic variation. (i) This genetic variation may confer some survival advantages on the offspring, under stressful environmental conditions. (ii) It ...
... Q. 2. Which is a better mode of reproduction: sexual or asexual? Why? Ans. Sexual reproduction is considered a better mode as it gives rise to genetic variation. (i) This genetic variation may confer some survival advantages on the offspring, under stressful environmental conditions. (ii) It ...
- Central Marine Fisheries Research Institute
... The cuttlefishes belonging to the family Sepiidae are of significant commercial value to artisanal and industrial fisheries. Cuttlefishes are primarily bottom-dwellers over a range of habitats, including rocky, sandy, and muddy substrates, seagrass, seaweed and coral reefs. They are slower swimmers ...
... The cuttlefishes belonging to the family Sepiidae are of significant commercial value to artisanal and industrial fisheries. Cuttlefishes are primarily bottom-dwellers over a range of habitats, including rocky, sandy, and muddy substrates, seagrass, seaweed and coral reefs. They are slower swimmers ...
Sexual selection and sympatric speciation van Doorn, Gerrit
... In a variety of species, sex-related genes show a remarkable pattern of molecular evolution. DNA sequence analysis has shown extraordinary divergence of fertilization proteins among closely related marine invertebrate species (Lee et al., 1995; Metz & Palumbi, 1996; Biermann, 1998; Metz et al., 1998 ...
... In a variety of species, sex-related genes show a remarkable pattern of molecular evolution. DNA sequence analysis has shown extraordinary divergence of fertilization proteins among closely related marine invertebrate species (Lee et al., 1995; Metz & Palumbi, 1996; Biermann, 1998; Metz et al., 1998 ...
Growth, Survival, and Reproduction in a Northern Illinois Population
... pared between males and females using ANCOVA with mean SVL as a covariate. Large individuals sometimes appeared to decrease in SVL between captures within a year presumably because of measurement error. To minimize this error, only first and last captures within a season were used to calculate growt ...
... pared between males and females using ANCOVA with mean SVL as a covariate. Large individuals sometimes appeared to decrease in SVL between captures within a year presumably because of measurement error. To minimize this error, only first and last captures within a season were used to calculate growt ...
Assortative mating among animals of captive and wild origin
... can result in rapid selection or plastic responses in phenotypic or life-history traits that can reduce an individual’s fitness on release and compromise the chances of successful reintroduction [4 –7]. Change in mate preference is one such modification that may occur in captivity, but has received ...
... can result in rapid selection or plastic responses in phenotypic or life-history traits that can reduce an individual’s fitness on release and compromise the chances of successful reintroduction [4 –7]. Change in mate preference is one such modification that may occur in captivity, but has received ...
Asexual & Sexual Reproduction
... Crayfish: Cray fish can regrow claws, pinchers, or legs. It is easy to recognize the regenerated part because it is smaller than the other parts. Just like the lizard, it can break off a claw or leg so that it can escape when captured by a predator. ...
... Crayfish: Cray fish can regrow claws, pinchers, or legs. It is easy to recognize the regenerated part because it is smaller than the other parts. Just like the lizard, it can break off a claw or leg so that it can escape when captured by a predator. ...
Ch 17 (30 MCQ questions)
... c) Weigel and Newmann found much stronger attitude–behaviour relations by taking an average measure of all of the behaviours, rather than any single behaviour. d) The multiple-act criterion involves measuring a large number of behaviours both relevant and irrelevant to the general attitude being stu ...
... c) Weigel and Newmann found much stronger attitude–behaviour relations by taking an average measure of all of the behaviours, rather than any single behaviour. d) The multiple-act criterion involves measuring a large number of behaviours both relevant and irrelevant to the general attitude being stu ...
Mate choice inside an egg cell.
... envelope, thus, the newly formed pronucleus is a mosaic. Sperm retain part of their original nuclear membrane, with variation between sperm being a function of the amount and/or composition of nuclear membrane retained (Yanagimachi and Noda 1970, Longo 1976). There is a noticeable gap in the literat ...
... envelope, thus, the newly formed pronucleus is a mosaic. Sperm retain part of their original nuclear membrane, with variation between sperm being a function of the amount and/or composition of nuclear membrane retained (Yanagimachi and Noda 1970, Longo 1976). There is a noticeable gap in the literat ...
Goniopsis cruentata (Mangrove Root Crab)
... are belligerent and challenge each other for food and burrowing holes. They are generally found alone or at least 30cm away from any other crab, very seldom they can be seen in groups of two or three. REPRODUCTION. Like almost all crabs, the female’s abdomen is wider than the male for egg storage; i ...
... are belligerent and challenge each other for food and burrowing holes. They are generally found alone or at least 30cm away from any other crab, very seldom they can be seen in groups of two or three. REPRODUCTION. Like almost all crabs, the female’s abdomen is wider than the male for egg storage; i ...
Animal sexual behaviour
Animal sexual behaviour takes many different forms, even within the same species. Common mating or reproductively motivated systems include monogamy, polyandry, polygamy, and promiscuity. Other sexual behaviour may be reproductively motivated (e.g. sex apparently due to duress or coercion and situational sexual behaviour) or non-reproductively motivated (e.g. interspecific sexuality, sexual arousal from objects or places, sex with dead animals, homosexual sexual behaviour, bisexual sexual behaviour, and a range of other behaviours).When animal sexual behaviour is reproductively motivated, it is often termed mating or copulation; for most non-human mammals, mating and copulation occur at estrus (the most fertile period in the mammalian female's reproductive cycle), which increases the chances of successful impregnation. Some animal sexual behaviour involves competition, sometimes fighting, between multiple males. Females often select males for mating only if they appear strong and able to protect themselves. The male that wins a fight may also have the chance to mate with a larger number of females and will therefore pass on his genes to their offspring.Historically, it was believed that only humans and a small number of other species performed sexual acts other than for reproduction, and that animals' sexuality was instinctive and a simple ""stimulus-response"" behaviour. A range of species masturbate and may use objects as tools to help them do so.