Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 42 for “"Life-history strategy"”.
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Life History Strategy And The Role Of Self-Regulation In Cheating Behavior
… and if the distal causal framework of life history theory could illuminate the relationships between self-regulation and cheating behavior. Participants in the experimental condition had their state self-regulation taxed (compared to the control condition); participants had an …
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Jacking in Chinook salmon (Oncorhynchus tshawytscha ): environmental and genotypic effects on life history strategy
Jacking in Chinook salmon (Oncorhynchus tshawytscha), is defined as precocious sexual maturation of males after at least 1 year in sea water, and occurring 1 year prior to females of the same cohort. Substantial evidence supports genetic, environmental, and genetic by environmental effects on …
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A re-evaluation of the life history strategy of Cape horse mackerel, Trachurus capensis in the southern Benguela
The life history strategy of the Cape horse mackerel, Trachurus capensis in the southern Benguela, relating to distribution and reproductive ecology, was re-evaluated. It is possible that certain aspects of the species' life history may have changed since the previous assessment by Barange et al. …
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The effects of life history strategy and uncertainty on a probability-based approach to managing the risk of overfishing
… uncertainty in the stock assessment and on the life history of the species in question. To evaluate these effects on the risks associated with P* rules, my study simulated fishing three example species under three levels of uncertainty. Trends identified among example species were consistent …
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BEHAVIORAL ECOLOGY OF ORYZOMYS PALUSTRIS (MARSH RICE RAT) IN COASTAL TEXAS: IMPLICATIONS FOR THE LIFE-HISTORY STRATEGY OF BAYOU VIRUS (BAYV)
… and Texas. O. palustris has the capacity for life longevity and distance dispersing, and is an integral marshland mammal, performing important roles in the riverine and coastal marsh, trophic webs along the Atlantic Coast and the northern Gulf of Mexico. Although macro- and microhabitat …
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Young adults' sexual strategies and mating displays in the virtual world: an evolutionary perspective
Life History Theory (LHT) predicts that natural selection favours a degree of developmental plasticity when it comes to sexual strategies and mating displays. Individuals should develop a faster life history strategy (showing, for example, higher mating effort and a preference for a variety of …
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Ecology and Life History of the Speckled Madtom, Noturus leptacanthus (Ictaluridae)
… research represents an effort to understand the life history, strategy, and ecological relationships of <em>Noturus leptacanthus</em>. In particular I have tried to compare the combination of low fecundity, large egg size, parental car , and marked sexual dimorphism in <em>leptacanthus</em> with …
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Exploring Life History Strategies in Adolescence; Attachment, Personality, and Bullying
… apply a component of Evolutionary Theory, termed Life History Strategy (LHS), to the study of bullying. The current study aimed to highlight the relationship between environmental pressures, slow and fast LHS, and bullying subtypes. A sample of 261 participants (125 males and 135 females) between …
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The ecology of sprouting in South African forests, savannas and fynbos
… has only recently received attention as a key life history strategy, especially in less disturbance prone environments. The aims of this thesis were to explore the ecological role of sprouting in selected South African biomes. In particular, to explore the biogeographic, community and …
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Behavioral ecology of the Colorado brown tarantula (Aphonopelma hentzi): Activities displayed around the burrow through juvenile group dispersal
<p>The life history strategy of the Colorado brown tarantula (Aphonopelma hentzi) typically includes males spatially scattering in search for a female mate in the fall, followed by female attendance of fertilized eggs the following summer. Here, I highlighted aspects associated with this female …
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Wintering Ecology of Buff-Breasted Sandpipers (Tryngites subruficollis) in Southern Brazil
… on within- and among-year density trends, life-history strategy, molt, body condition and population dynamics of Buff-breasted Sandpipers wintering in southern Brazil. Additionally, I provide a discriminant function to accurately sex Buffbreasted Sandpipers using morphometric measures. I …
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Effects of Culverts on Brook Trout Genetic Diversity
… types has been identified as an alternative life-history strategy to maximize spawning and growth. Brook trout were genetically analyzed using a suite of 13 microsatellite loci above 7 culverts with varying levels of passability classified through a physical protocol. While most sites were …
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Seasonal habitat and movement ecology of adult brook trout in a northern Michigan headwater stream
… trout move among suitable habitats depends on life history strategy and stability in environmental conditions. This study examined the seasonality of stream-resident adult brook trout habitat use and movement patterns, and the influence of brook trout size and condition on mobility at multiple …
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The population dynamics of shortnose gar in the Illinois River to inform management of an emerging recreational fishery
… risk of overharvest because of their periodic life history strategies. In my first study, I utilized standardized population assessments to estimate the relative abundance, stock structure and vital rates of Shortnose Gar (Lepisosteus platostomus) in the lower Illinois River. The findings …
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Population ecology of landlocked Arctic charr, <i>Salvelinus alpinus L</i>., in the Canadian High Arctic
… The key hypothesis is that the alternative life history strategies represented by Dwarf and Normal charr represent different solutions to the problem of energy limitation within a size-structured population. Major findings of the models are that alternative life history strategies should be …
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Biotic and abiotic interactions of deep-sea hydrothermal vent-endemic fish on the East Pacific Rise
… this technique could be utilized to examine life history strategy and habitat use. Chemical characteristics of preferred fish habitat and gene expression responses habitat chemistry were explored. Gut contents indicated that T. hollisi specimens were actively feeding upon a combination of …
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FORAGING BEHAVIOR OF DUCKS DURING SPRING MIGRATION IN THE WABASH RIVER REGION, ILLINOIS
… food abundance, predation risk, competition, and life history characteristics on foraging strategies used by ducks. Using a randomized block design, I established a pair of 0.4 ha plots (block) in emergent, open water, and forested wetlands in the Wabash River Floodplain in eastern Illinois. I …
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Resolving the evolutionary history of multiple groups of freshwater mussels (Bivalvia : Unionidae).
… in this group is strongly shaped by a life history strategy that includes an obligate parasitic larval stage. Alarmingly, anthropogenic alterations to freshwater ecosystems have disproportionately impacted mussels as a group, resulting in freshwater mussels being one of the most …
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Biotic and abiotic interactions of deep-sea hydrothermal vent-endemic fish on the East Pacific Rise
… this technique could be utilized to examine life history strategy and habitat use. Chemical characteristics of preferred fish habitat and gene expression responses habitat chemistry were explored. Gut contents indicated that T. hollisi specimens were actively feeding upon a combination of …
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