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Now showing items 31-40 of 45
Telomere Length and Senescence in a Long-lived Fish (Ictiobus cyprinellus)
(North Dakota State University, 2019)
The pattern of shorter telomere lengths in older individuals has been observed across many vertebrates, but has not been well-documented in bony fishes. Bony fish (i.e., Class Osteichthyes) represent the most speciose and ...
Testosterone (T) and Triiodothyronine (T3) in Franklin’s Gull (Leucophaeus Pipixcan) Eggs
(North Dakota State University, 2018)
Maternally-derived hormones are known to influence the growth and development of offspring. The differential deposition of these maternally-derived hormones into egg yolk is one way by which females can alter and impact ...
Peripheral Hormone Interactions with the Growth Hormone-Insulin-Like Growth Factor (GH-IGF) System in Rainbow Trout
(North Dakota State University, 2019)
The growth of vertebrates is primarily regulated by the growth hormone-insulin-like growth factor (GH-IGF) system, but not in isolation. The central question of this dissertation was how do other hormones peripheral to the ...
Eat to Reproduce: The Role of Diet Quantity on Honey Bee (Apis Mellifera) Caste Determination
(North Dakota State University, 2017)
The received wisdom is that diet quality drives this queen-worker dichotomy, even though diet quantity differs significantly between queen and worker diet. Diet quantity likely determines honey bee caste; yet it has never ...
Population Dynamics and Management Implications for American White Pelicans (Pelecanus Erythrorhynchos) Breeding at Marsh Lake, Lac Qui Parle Wildlife Management Area, Minnesota
(North Dakota State University, 2016)
The American white pelican (Pelecanus erythrorhynchos) is a prominent breeding bird in Minnesota, but little information has been available on their production, population dynamics, growth and development, or demographic ...
Environmental Components of Phenotypic Variation Dietary and Trans-Generational Effects on Behavior
(North Dakota State University, 2017)
Phenotypic variation, or the total variation in a trait, and its components are of great importance in the fields of evolutionary and behavioral ecology. Phenotypic variation can be broken down into both environmental and ...
Characterization of Variation in Growth Performance in Inbred Strains of Zebrafish (Danio Rerio)
(North Dakota State University, 2012)
Although zebrafish have been a widely utilized model organism for several decades, there is little information available on physiological variation underlying genetic variation among the commonly used inbred strains. This ...
Characterizing the Immune Response of the Alfalfa Leafcutting Bee throughout Pupal Development
(North Dakota State University, 2015)
Megachile rotundata is a solitary cavity nesting bee that is the primary commercial pollinator of alfalfa in North America. During prepupal to adult development, they may be exposed to fungal, parasitic, and bacterial ...
The Prairie Science Classroom: Original Outcome Durability and Impact on the Connection to Nature
(North Dakota State University, 2017)
Environmental Education (EE) seeks to create an informed citizenry capable of taking action on environmental issues. Recent calls for more consistent evaluation of EE point to a need for more long-term evaluations as well ...
Assessment of Blackbird Damage to Sunflower and Corn Fields in the Prairie Pothole Region of North Dakota
(North Dakota State University, 2011)
North Dakota is the top sunflower producing state in the United States, annually harvesting about 405,000 ha (1 million acres). Up to 63% of this crop is grown in central North Dakota in an area known as the Prairie Pothole ...