Global ETD Search
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Showing 1 to 5 of 5 for “"selfish-herd"”.
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Two Layers of Selfish-Herds in Spawning Aggregations of Chub (Nocomis Sp.) and its Nest Associates
… survival and predator evasion until selfish-herd theory was introduced. It proposed that individuals congregate not as a method of protection for the entire population, but instead to better the individual's chance of survival, thereby using the group to benefit itself (i.e., …
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Cheating and Selfishness in Reproductive Interactions among Nest Associative Cyprinids
… role of host parental care while testing for the selfish-herd effect. Additionally, I examined multiple nest associates in order to elucidate potential cheaters. I utilized gonadosomatic index (GSI) to compare reproductive condition among the bluehead chub Nocomis leptocephalus and its putative …
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Predation Risk and Colony Structure in the Pea Aphid, Acyrthosiphon Pisum
… to reduce individual predation risk. Hamilton's "Selfish Herd" theory states that an individual should assume a central position within a group to decrease individual predation risk relative to that of its neighbors (i.e., individuals should be selfish). This theory, however, cannot predict the …
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The effects of white shark presence on the behaviour of Cape fur seals at Geyser Rock, Gansbaai, South Africa
… on group formation (safety in numbers) and selfish herd tactics within such groups to reduce predation risk. Rather, seals at Geyser Rock avoided deep open water patches during winter and shifted their movement patterns to and from the island to sectors with greater subsurface habitat …
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Effects of Temperature and Dissolved Oxygen on Development and Survival of Embryos in Nests of Bluehead Chub Nocomis leptocephalus
Temperature and dissolved oxygen (DO) are two fundamental environmental factors that shape metabolic demand, developmental rate, and survival in fish embryos. Because embryos rely entirely on diffusion for oxygen uptake and cannot move away from stressful conditions, even small shifts in …