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Full-Text Articles in Biology
Effects Of Age And Prior Reproduction On The Cost Of Reproduction In Two Species Of Burying Beetles, Ethan Damron, Dane Jo, Mark Belk
Effects Of Age And Prior Reproduction On The Cost Of Reproduction In Two Species Of Burying Beetles, Ethan Damron, Dane Jo, Mark Belk
Journal of Undergraduate Research
Understanding how much energy an organism allocates to breeding to maximize reproduction over their lifetime, or the cost of reproduction, is a central idea to understanding the variations in patterns of reproduction among living organisms (Creighton et al., 2009). In most studies of cost of reproduction, age is confounded with prior reproductive experience. As individuals age, they tend to reproduce making it difficult to disentangle these two factors when evaluating costs of reproduction. It is not clear whether reproduction early in life costs the same as reproduction later in life and how much of that difference might be due to …
Latitudinal Variation In Lifetime Survival And Reproduction In A Burying Beetle, Clinton T. Laidlaw
Latitudinal Variation In Lifetime Survival And Reproduction In A Burying Beetle, Clinton T. Laidlaw
Theses and Dissertations
Temperature variation experienced across a latitudinal range is tied to changes in lifespan and life history across multiple taxa. Two patterns of adaptation to latitudinal temperature variation have been documented – counter-gradient (or co-gradient) variation, and local adaptation. To determine how natural selection has shaped life history variation in a burying beetle, Nicrophorus orbicollis, we quantified lifetime patterns of reproduction in two populations that represent the geographic and temperature extremes occupied by the species. Lifetime reproduction was quantified at two temperatures that represented conditions typical for each population. Burying beetles from different extremes of their geographic range show considerable variation …
Variation In Resource Utilization And Cost Of Reproduction For Two Burying Beetle Species, Peter J. Meyers
Variation In Resource Utilization And Cost Of Reproduction For Two Burying Beetle Species, Peter J. Meyers
Theses and Dissertations
The cost of reproduction hypothesis suggests that allocation into current reproduction constrains future reproduction. How organisms accrue reproductive costs may differ between species and with varying levels of resource quality. Burying beetles are model organisms for testing for the cost of reproduction because of their unique natural history; beetles utilize small vertebrate carcasses for reproduction and they and their offspring feed exclusively on these discrete resources. Burying beetles also can utilize a large range of carcass sizes for reproduction. We tested for the cost of reproduction in two species of burying beetles, Nicrophorus marginatus and Nicrophorus guttula found in Central …
Generality Of The Terminal Investment Hypothesis: Effects Of Extrinsic Mortality And Resource Availability On Age-Related Reproductive Investment, Allystair Jones
Generality Of The Terminal Investment Hypothesis: Effects Of Extrinsic Mortality And Resource Availability On Age-Related Reproductive Investment, Allystair Jones
Theses and Dissertations
A central question in life history theory is, what combination of traits and behaviors will lead to the highest reproductive success throughout a lifetime. The trade-off between current and future reproduction is central to the lifetime reproductive success of an organism. If there is a cost to reproduction, then allocation of energy to current reproduction will come at a cost to future reproduction. We expect young individuals to favor future reproduction over current reproduction and that balance shifts to current reproduction as they age (i.e. terminal investment hypothesis). However, how this transition from an emphasis on future reproduction to emphasis …
Changes In Life History Within An Individual's Lifetime, Eric J. Billman
Changes In Life History Within An Individual's Lifetime, Eric J. Billman
Theses and Dissertations
A central goal of life history theory is to understand the selective factors that generate the diversity of reproductive patterns observed in nature. Within lifetime changes in reproductive investment will determine an organism's fitness; however, this area of life history theory has received less attention than comparisons among population that characterize life history traits as a single population mean. Reproductive allocation can be affected by multiple cues; the integration of these cues across an organism's lifetime generates the diversity in life history strategies observed in nature. Life history studies should examine the interacting effects of multiple cues on life history …