Lifetime Reproductive Effort
... tropical species of gecko must also come with a high degree of error. Because geckos generally lay one egg at a time, the chance of recapturing individual females that may lay more than six eggs (clutches) a year (and thus require 16 recaptures) is highly unlikely. Thus, it would not be surprising i ...
... tropical species of gecko must also come with a high degree of error. Because geckos generally lay one egg at a time, the chance of recapturing individual females that may lay more than six eggs (clutches) a year (and thus require 16 recaptures) is highly unlikely. Thus, it would not be surprising i ...
The love-darts of land snails: integrating physiology, morphology
... dart in increasing male reproductive success. Nevertheless, caution is needed when generalizing the use and effects of the love-dart, which are predominantly based on one model organism. ...
... dart in increasing male reproductive success. Nevertheless, caution is needed when generalizing the use and effects of the love-dart, which are predominantly based on one model organism. ...
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 ...
LIFE-HISTORY EVOLUTION IN REPTILES
... and birds that maintain relatively high and constant internal temperatures via their own metabolic processes, reptiles are ectotherms. By exploiting ambient thermal heterogeneity to control its internal temperature, a reptile may be able to achieve a body temperature as high as that of a sympatric e ...
... and birds that maintain relatively high and constant internal temperatures via their own metabolic processes, reptiles are ectotherms. By exploiting ambient thermal heterogeneity to control its internal temperature, a reptile may be able to achieve a body temperature as high as that of a sympatric e ...
Common Clownfish Amphiprion ocellaris
... Predators: Predators to clownfish include larger fish, sharks, and rays. Life Span: In the wild, clownfish can live to between 6 and 10 years of age. Reproduction: Common Clownfish are protandrous hermaphrodites, meaning that all clownfish are born with active male reproductive organs as well as dor ...
... Predators: Predators to clownfish include larger fish, sharks, and rays. Life Span: In the wild, clownfish can live to between 6 and 10 years of age. Reproduction: Common Clownfish are protandrous hermaphrodites, meaning that all clownfish are born with active male reproductive organs as well as dor ...
Seasonal Timing of Reproduction and Hibernation in the Edible
... Germany (Vietinghoff-Riesch, 1960; Bieber, 1998; Fietz et al., 2004), but slightly less (seven months) in the warmer climate of Italy (Pilastro et al., 2003). It should be noted that this extremely long duration of hibernation is, to our knowledge, matched only by a single other species, Spermophilu ...
... Germany (Vietinghoff-Riesch, 1960; Bieber, 1998; Fietz et al., 2004), but slightly less (seven months) in the warmer climate of Italy (Pilastro et al., 2003). It should be noted that this extremely long duration of hibernation is, to our knowledge, matched only by a single other species, Spermophilu ...
spider monkey fact sheet - World Animal Foundation
... supervision and mental stimulation. They usually require a large amount of attention. Monkeys cannot handle being away from their owners for long periods of time, such as family trips for example, due to their need of attention. Bored monkeys can become extremely destructive and may even go so far a ...
... supervision and mental stimulation. They usually require a large amount of attention. Monkeys cannot handle being away from their owners for long periods of time, such as family trips for example, due to their need of attention. Bored monkeys can become extremely destructive and may even go so far a ...
Reproductive versus ecological advantages to larger body size in
... of fecundity selection in females (and hence, overall selection on female body size) is likely to be relatively consistent among lineages. In this paper, we explore the degree to which larger body size enhances ecological attributes (e.g., food intake, growth, survival) and reproductive output (repr ...
... of fecundity selection in females (and hence, overall selection on female body size) is likely to be relatively consistent among lineages. In this paper, we explore the degree to which larger body size enhances ecological attributes (e.g., food intake, growth, survival) and reproductive output (repr ...
The mating system of the brown bear Ursus arctos
... seasonal polyoestrous in female brown bears, in which two cycles were separated by four to 18 days of sexual inactivity. Stenhouse et al. (2005) suggested that polyoestry is common in free-living female brown bears, because 51% of the reproducing females that they monitored engaged in more than one ...
... seasonal polyoestrous in female brown bears, in which two cycles were separated by four to 18 days of sexual inactivity. Stenhouse et al. (2005) suggested that polyoestry is common in free-living female brown bears, because 51% of the reproducing females that they monitored engaged in more than one ...
Life History Patterns and the Comparative Social Ecology of
... Cross-species comparisons of life history traits in Carnivora reveal extensive differences in rates and modes of reproduction. Undoubtedly, much of this variation may be accounted for by body size differences (83, 319), and such allometric effects must be incorporated into comparative studies. Even ...
... Cross-species comparisons of life history traits in Carnivora reveal extensive differences in rates and modes of reproduction. Undoubtedly, much of this variation may be accounted for by body size differences (83, 319), and such allometric effects must be incorporated into comparative studies. Even ...
Growth, Survival, and Reproduction in a Northern Illinois Population
... known age. For these snakes, age estimation was not necessary, but provided an indication of the match between estimated and true age. Some known age individuals (1995, 1996, and 1999 cohorts) were maintained in captivity between 36 and 52 weeks before being released, whereas others (1998 and 2000 c ...
... known age. For these snakes, age estimation was not necessary, but provided an indication of the match between estimated and true age. Some known age individuals (1995, 1996, and 1999 cohorts) were maintained in captivity between 36 and 52 weeks before being released, whereas others (1998 and 2000 c ...
... be due to a long wet season favorable influence. Fitch and Sandidge (1953) interpreted Didelphis virginiana semelparity by saying that either females are preyed upon after first breeding or they remain too exhausted to breed for a second time. Climate and diet could be important factors affecting mu ...
Reproduction: Cetaceans.
... Similar to porpoises and otariids: Annual pupping, delayed implantation capability; Lactation 4-6 months; First reproduction at 3-4 yrs; Breeding life of 10-12 yrs; Males territorial during breeding season, with slight sexual dimorphism in size (males larger) ...
... Similar to porpoises and otariids: Annual pupping, delayed implantation capability; Lactation 4-6 months; First reproduction at 3-4 yrs; Breeding life of 10-12 yrs; Males territorial during breeding season, with slight sexual dimorphism in size (males larger) ...
Ecology and Reproductive Characteristics of the Skink
... 1 mo earlier than VanDenburgh’s. This species is a poorly known species ranging from southern China to Taiwan, including tropical Orchid I. (Zhao and Adler 1993), off the southeastern coast of Taiwan. For most tropical oviparous lizards, both males and females seem to exhibit year-round gonadogenesi ...
... 1 mo earlier than VanDenburgh’s. This species is a poorly known species ranging from southern China to Taiwan, including tropical Orchid I. (Zhao and Adler 1993), off the southeastern coast of Taiwan. For most tropical oviparous lizards, both males and females seem to exhibit year-round gonadogenesi ...
Ch 51 Animal Behavior student notes-wiki
... Social behaviors ____________________________________________ hierarchy social ranking within a group ___________________________________ order ...
... Social behaviors ____________________________________________ hierarchy social ranking within a group ___________________________________ order ...
Crab-eating Raccoon
... and Feldhamer, 1983). The densities per area fluctuate but 1/km2 is not unusual in some habitats (Eisenberg and Redford, 1999). Exceptions to this do occur when there is a shortage of food or when denning when interactions between individuals have been observed. During the breeding season, young mal ...
... and Feldhamer, 1983). The densities per area fluctuate but 1/km2 is not unusual in some habitats (Eisenberg and Redford, 1999). Exceptions to this do occur when there is a shortage of food or when denning when interactions between individuals have been observed. During the breeding season, young mal ...
Caribbean Giant Roach
... The only visible difference between the sexes is on the last abdominal segment, which is the one that bears the "cerci." These cerci are present in both males and females, and look like a pair of short, rear-end antennae. Just between the cerci of the males is a pair of hair-like appendages called " ...
... The only visible difference between the sexes is on the last abdominal segment, which is the one that bears the "cerci." These cerci are present in both males and females, and look like a pair of short, rear-end antennae. Just between the cerci of the males is a pair of hair-like appendages called " ...
Synurbization Processes in Population of Apodemus agrarius I
... in the park habitat, making it difficult, by the autumn of 1976, to obtain sufficient material for studies there. Seasonal variations in numbers in the three study populations took different courses. In 1975 during the period from spring to autumn in Młociny Wood no variations in population numbers ...
... in the park habitat, making it difficult, by the autumn of 1976, to obtain sufficient material for studies there. Seasonal variations in numbers in the three study populations took different courses. In 1975 during the period from spring to autumn in Młociny Wood no variations in population numbers ...
Chapter 51 Presentation
... ritualistic type of competition that determines which competitors gain access to a resource such as food or mates. The outcome can be determined by strength, size, or in the form of horns, teeth, etc. They can be psychological in appearance. travismulthaupt.com ...
... ritualistic type of competition that determines which competitors gain access to a resource such as food or mates. The outcome can be determined by strength, size, or in the form of horns, teeth, etc. They can be psychological in appearance. travismulthaupt.com ...
Southwestern Naturalist
... density for S. grammicus at La Michilía (42 in- range of factors, physiological and behavioral, dividuals/ha) is close to the general averages. both intrinsic aspects of the individual, and exWe were unable to find any previous study on trinsic factors of the physical and even social environment. Fo ...
... density for S. grammicus at La Michilía (42 in- range of factors, physiological and behavioral, dividuals/ha) is close to the general averages. both intrinsic aspects of the individual, and exWe were unable to find any previous study on trinsic factors of the physical and even social environment. Fo ...
What is the appropriate timescale for measuring
... which these resources have been gathered, not just the `reproductive' year. The problem is even worse for survival rates, the other main potential currency in which costs can be assessed (and probably, the most important such currency for many kinds of animals ± Shine and Schwarzkopf, 1992). By anal ...
... which these resources have been gathered, not just the `reproductive' year. The problem is even worse for survival rates, the other main potential currency in which costs can be assessed (and probably, the most important such currency for many kinds of animals ± Shine and Schwarzkopf, 1992). By anal ...
Genetics: The Science of Variation
... assumption. Thousands of other facts have been satisfactorily explained on similar grounds, and there are at present no known facts contrary to the principle of evolution. For these reasons scientists the world over agree that the validity of the principle has been amply demonstrated. Many go so far ...
... assumption. Thousands of other facts have been satisfactorily explained on similar grounds, and there are at present no known facts contrary to the principle of evolution. For these reasons scientists the world over agree that the validity of the principle has been amply demonstrated. Many go so far ...
A View of Life
... Territoriality is protecting an area against other individuals. – Red Deer Stags (males) compete for groups of hinds (females). Hinds only mate with one stag. Harem Master must be large and powerful to fight off challengers. Less body fat, thus may be more likely to starve in bad times, and ha ...
... Territoriality is protecting an area against other individuals. – Red Deer Stags (males) compete for groups of hinds (females). Hinds only mate with one stag. Harem Master must be large and powerful to fight off challengers. Less body fat, thus may be more likely to starve in bad times, and ha ...
Dominance hierarchy
Dominance hierarchy arises when members of a social group interact, often aggressively, to create a ranking system. In social living groups, members are likely to compete for access to limited resources and mating opportunities. Rather than fight each time they meet, relative relationships are formed between members of the same sex. These repetitive interactions lead to the creation of a social order that is subject to change each time a dominant animal is challenged by a subordinate one.