Alexander H Harcourt
Biographic Data
| ID | 3581083 |
|---|---|
| NAME | Alexander H Harcourt |
| GIVEN NAMES | Alexander H |
| FAMILY NAME | Harcourt |
| SIGNATURE | HARCOURT A H |
| AFFILIATIONS | University of California, Davis |
| VERIFIED | No |
| TOTAL WORKS | 13 |
| TOTAL CITATIONS | 19 |
| WORKS AS AUTHOR | 13 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 1978 |
| LATEST PUBLICATION YEAR | 2012 |
| H-INDEX | 2 |
Rivers as Barriers to Primate Distributions in Africa
Diversity, Body Mass, and Latitudinal Gradients in Primates
We examined latitudinal gradients in central value and diversity of body mass of primates to increase understanding of the Forster effect (decrease in taxonomic diversity with increasing latitude) and the Bergmann effect (increase of body mass with latitude). Data are from the literature. We used species’ median body mass of females and mid-latitude ( N = 164). We account for phylogenetic effects with comparative analysis by independent contrasts…
Are lemurs’ low basal metabolic rates an adaptation to Madagascar’s unpredictable climate?
Gorilla society
Science is fairly certain that the gorilla lineage separated from the remainder of the hominoid clade about eight million years ago, 2 , 4 and that the chimpanzee lineage and hominin clade did so about a million years after that. 1 , 2 However, just this year, 2007, it was discovered that although the human head louse separated from the congeneric chimpanzee body louse ( Pediculus ) around the same time as the chimpanzee and hominin lineages spli…
Primate evolution
What biological traits distinguish taxa susceptible to extinction from less susceptible taxa? Substantiated island biogeographic theory suggests that after insularization, small islands lose more species than do large islands. Thus, susceptible taxa are those now found on only large islands. The traits of susceptible taxa can thus be found by comparing the biology of species found only on large islands with those also found on small islands. The …
Conservation in practice
Does primate socioecology need nonprimate socioecology
Sexual selection and sperm competition in primates
One hundred twenty‐five years ago, in The Descent of Man and Selection in Relation to Sex , 1 Charles Darwin proposed the theory of sexual selection, as distinct from natural selection, to explain why, in some species, males have such magnificent ornaments and, in other species, such impressive weapons. He suggested two processes, which we now term female choice and male‐male competition: either females choose particularly ornate males or, altern…
The acoustic features of gorilla double grunts and their relation to behavior
Mountain gorillas ( Gorilla gorilla beringei ) give double‐grunts to one another in a variety of situations, when feeding, resting, moving, or engaged in other kinds of social behavior. Some double‐grunts elicit double‐grunts in reply whereas others do not. Double‐grunts are individually distinctive, and high‐ranking animals give double‐grunts at higher rates than others. There was no evidence, however, that the probability of eliciting a reply d…
Cooperation in Conflicts
“The Parties to This Treaty...are resolved to unite their efforts for collective defense,” and to a fairly large extent, the nations of the North Atlantic Treaty Organization (NATO) have done just that for nearly 50 years. “During fights, individuals compare the strength of their own group with that of the opponent. When they perceive that group members locally outnumber opponents, they behave aggressively, recruiting to the battle and cooperatin…
Experimental findings on alliances and dominance rank
Testis weight, body weight and breeding system in primates
Strategies of Emigration and Transfer by Primates, with Particular Reference to Gorillas
In many primate species, more ♂ ♂ than ♀ ♀ leave their natal group and transfer to another. In man, chimpanzee and the gorilla, however, the reverse is the case. This paper presents detailed data for the gorilla on individuals' movements into and out of breeding units. Comparisons are made with other primates, and with data on two non‐primate species in which ♀♀ rather than ♂ ♂ move between breeding units. Proximate causes and functions of emigra…
Rivers as Barriers to Primate Distributions in Africa
Diversity, Body Mass, and Latitudinal Gradients in Primates
We examined latitudinal gradients in central value and diversity of body mass of primates to increase understanding of the Forster effect (decrease in taxonomic diversity with increasing latitude) and the Bergmann effect (increase of body mass with latitude). Data are from the literature. We used species’ median body mass of females and mid-latitude ( N = 164). We account for phylogenetic effects with comparative analysis by independent contrasts…
Cooperation in Conflicts
“The Parties to This Treaty...are resolved to unite their efforts for collective defense,” and to a fairly large extent, the nations of the North Atlantic Treaty Organization (NATO) have done just that for nearly 50 years. “During fights, individuals compare the strength of their own group with that of the opponent. When they perceive that group members locally outnumber opponents, they behave aggressively, recruiting to the battle and cooperatin…
Strategies of Emigration and Transfer by Primates, with Particular Reference to Gorillas
In many primate species, more ♂ ♂ than ♀ ♀ leave their natal group and transfer to another. In man, chimpanzee and the gorilla, however, the reverse is the case. This paper presents detailed data for the gorilla on individuals' movements into and out of breeding units. Comparisons are made with other primates, and with data on two non‐primate species in which ♀♀ rather than ♂ ♂ move between breeding units. Proximate causes and functions of emigra…
Testis weight, body weight and breeding system in primates
Experimental findings on alliances and dominance rank
Cooperation in Conflicts
“The Parties to This Treaty...are resolved to unite their efforts for collective defense,” and to a fairly large extent, the nations of the North Atlantic Treaty Organization (NATO) have done just that for nearly 50 years. “During fights, individuals compare the strength of their own group with that of the opponent. When they perceive that group members locally outnumber opponents, they behave aggressively, recruiting to the battle and cooperatin…
The acoustic features of gorilla double grunts and their relation to behavior
Mountain gorillas ( Gorilla gorilla beringei ) give double‐grunts to one another in a variety of situations, when feeding, resting, moving, or engaged in other kinds of social behavior. Some double‐grunts elicit double‐grunts in reply whereas others do not. Double‐grunts are individually distinctive, and high‐ranking animals give double‐grunts at higher rates than others. There was no evidence, however, that the probability of eliciting a reply d…
Sexual selection and sperm competition in primates
One hundred twenty‐five years ago, in The Descent of Man and Selection in Relation to Sex , 1 Charles Darwin proposed the theory of sexual selection, as distinct from natural selection, to explain why, in some species, males have such magnificent ornaments and, in other species, such impressive weapons. He suggested two processes, which we now term female choice and male‐male competition: either females choose particularly ornate males or, altern…
Does primate socioecology need nonprimate socioecology
Conservation in practice
Primate evolution
What biological traits distinguish taxa susceptible to extinction from less susceptible taxa? Substantiated island biogeographic theory suggests that after insularization, small islands lose more species than do large islands. Thus, susceptible taxa are those now found on only large islands. The traits of susceptible taxa can thus be found by comparing the biology of species found only on large islands with those also found on small islands. The …
Gorilla society
Science is fairly certain that the gorilla lineage separated from the remainder of the hominoid clade about eight million years ago, 2 , 4 and that the chimpanzee lineage and hominin clade did so about a million years after that. 1 , 2 However, just this year, 2007, it was discovered that although the human head louse separated from the congeneric chimpanzee body louse ( Pediculus ) around the same time as the chimpanzee and hominin lineages spli…
Are lemurs’ low basal metabolic rates an adaptation to Madagascar’s unpredictable climate?
Diversity, Body Mass, and Latitudinal Gradients in Primates
We examined latitudinal gradients in central value and diversity of body mass of primates to increase understanding of the Forster effect (decrease in taxonomic diversity with increasing latitude) and the Bergmann effect (increase of body mass with latitude). Data are from the literature. We used species’ median body mass of females and mid-latitude ( N = 164). We account for phylogenetic effects with comparative analysis by independent contrasts…
Rivers as Barriers to Primate Distributions in Africa
Biology (11 works) · Primate Behavior and Ecology (10 works) · Zoology (7 works) · Ecology (6 works) · Geography (6 works) · Evolutionary biology (5 works) · Primate (5 works) · Wildlife Ecology and Conservation (5 works) · Animal Behavior and Reproduction (4 works) · Animal ecology (4 works)