Sexual size dimorphism in neonate Nerodia sipedon under controlled conditions over an early-life period. Lange, D. Ph.D. Thesis, University of Georgia, Athens, Georgia, USA, 2024. abstract bibtex We used weekly data on the snout-vent-length (SVL) and consumption of food in a population of wild, captive-born Nerodia sipedon collected over the first 67 weeks of life to evaluate multiple hypotheses exploring early-life sexual size dimorphism (SSD) in the species. We tested for the presence of SSD in an environment were access to food, water, heat, shelter, and protection from predation and competition were all equal between individual snakes to measure the extent of SSD under these conditions and detect any difference in resource allocation between sexes. We compared male and female consumption rates to test for a difference in appetite even under controlled conditions without the threat of predation. The snakes received thiamine supplementation during the final 20 weeks of the study, and we tested the effect of thiamine on growth and consumption. SSD is evident even in this captive-raised population, though not to the same extent as in four free-living N. sipedon populations used in Shine (1994) due to the study period only encompassing the first 67 weeks of life. A difference in consumption rates is also evident, with females consuming more food than males. No difference in the relationship between consumption and growth was detected between sexes, suggesting that if males and females have differences in resource allocation, it begins after sexual maturity or at least later in life than our study period covers. We found no conclusive effect of thiamine supplementation on growth rate, though further studies are needed to explore this relationship.
@phdthesis{lange_sexual_2024,
address = {Athens, Georgia, USA},
type = {@bathesis},
title = {Sexual size dimorphism in neonate {Nerodia} sipedon under controlled conditions over an early-life period},
abstract = {We used weekly data on the snout-vent-length (SVL) and consumption of food in a population of wild, captive-born Nerodia sipedon collected over the first 67 weeks of life to evaluate multiple hypotheses exploring early-life sexual size dimorphism (SSD) in the species. We tested for the presence of SSD in an environment were access to food, water, heat, shelter, and protection from predation and competition were all equal between individual snakes to measure the extent of SSD under these conditions and detect any difference in resource allocation between sexes. We compared male and female consumption rates to test for a difference in appetite even under controlled conditions without the threat of predation. The snakes received thiamine supplementation during the final 20 weeks of the study, and we tested the effect of thiamine on growth and consumption.
SSD is evident even in this captive-raised population, though not to the same extent as in four free-living N. sipedon populations used in Shine (1994) due to the study period only encompassing the first 67 weeks of life. A difference in consumption rates is also evident, with females consuming more food than males. No difference in the relationship between consumption and growth was detected between sexes, suggesting that if males and females have differences in resource allocation, it begins after sexual maturity or at least later in life than our study period covers. We found no conclusive effect of thiamine supplementation on growth rate, though further studies are needed to explore this relationship.},
school = {University of Georgia},
author = {Lange, Dylan},
year = {2024},
}
Downloads: 0
{"_id":"qQdi8H7EjWKCxTK7L","bibbaseid":"lange-sexualsizedimorphisminneonatenerodiasipedonundercontrolledconditionsoveranearlylifeperiod-2024","author_short":["Lange, D."],"bibdata":{"bibtype":"phdthesis","type":"@bathesis","address":"Athens, Georgia, USA","title":"Sexual size dimorphism in neonate Nerodia sipedon under controlled conditions over an early-life period","abstract":"We used weekly data on the snout-vent-length (SVL) and consumption of food in a population of wild, captive-born Nerodia sipedon collected over the first 67 weeks of life to evaluate multiple hypotheses exploring early-life sexual size dimorphism (SSD) in the species. We tested for the presence of SSD in an environment were access to food, water, heat, shelter, and protection from predation and competition were all equal between individual snakes to measure the extent of SSD under these conditions and detect any difference in resource allocation between sexes. We compared male and female consumption rates to test for a difference in appetite even under controlled conditions without the threat of predation. The snakes received thiamine supplementation during the final 20 weeks of the study, and we tested the effect of thiamine on growth and consumption. SSD is evident even in this captive-raised population, though not to the same extent as in four free-living N. sipedon populations used in Shine (1994) due to the study period only encompassing the first 67 weeks of life. A difference in consumption rates is also evident, with females consuming more food than males. No difference in the relationship between consumption and growth was detected between sexes, suggesting that if males and females have differences in resource allocation, it begins after sexual maturity or at least later in life than our study period covers. We found no conclusive effect of thiamine supplementation on growth rate, though further studies are needed to explore this relationship.","school":"University of Georgia","author":[{"propositions":[],"lastnames":["Lange"],"firstnames":["Dylan"],"suffixes":[]}],"year":"2024","bibtex":"@phdthesis{lange_sexual_2024,\n\taddress = {Athens, Georgia, USA},\n\ttype = {@bathesis},\n\ttitle = {Sexual size dimorphism in neonate {Nerodia} sipedon under controlled conditions over an early-life period},\n\tabstract = {We used weekly data on the snout-vent-length (SVL) and consumption of food in a population of wild, captive-born Nerodia sipedon collected over the first 67 weeks of life to evaluate multiple hypotheses exploring early-life sexual size dimorphism (SSD) in the species. We tested for the presence of SSD in an environment were access to food, water, heat, shelter, and protection from predation and competition were all equal between individual snakes to measure the extent of SSD under these conditions and detect any difference in resource allocation between sexes. We compared male and female consumption rates to test for a difference in appetite even under controlled conditions without the threat of predation. The snakes received thiamine supplementation during the final 20 weeks of the study, and we tested the effect of thiamine on growth and consumption.\n\nSSD is evident even in this captive-raised population, though not to the same extent as in four free-living N. sipedon populations used in Shine (1994) due to the study period only encompassing the first 67 weeks of life. A difference in consumption rates is also evident, with females consuming more food than males. No difference in the relationship between consumption and growth was detected between sexes, suggesting that if males and females have differences in resource allocation, it begins after sexual maturity or at least later in life than our study period covers. We found no conclusive effect of thiamine supplementation on growth rate, though further studies are needed to explore this relationship.},\n\tschool = {University of Georgia},\n\tauthor = {Lange, Dylan},\n\tyear = {2024},\n}\n\n\n\n","author_short":["Lange, D."],"key":"lange_sexual_2024","id":"lange_sexual_2024","bibbaseid":"lange-sexualsizedimorphisminneonatenerodiasipedonundercontrolledconditionsoveranearlylifeperiod-2024","role":"author","urls":{},"metadata":{"authorlinks":{}},"html":""},"bibtype":"phdthesis","biburl":"https://bibbase.org/zotero-group/jcmaerz/6026148","dataSources":["mCHFziEwJLRwofY4u","cEHounRE4nrKSn63i","jCzfhtqfYxC5Tyadj"],"keywords":[],"search_terms":["sexual","size","dimorphism","neonate","nerodia","sipedon","under","controlled","conditions","over","early","life","period","lange"],"title":"Sexual size dimorphism in neonate Nerodia sipedon under controlled conditions over an early-life period","year":2024}