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2020

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Deconstructing The Racialized Cannabis User: Cannabis Criminalization And Intersections With The Social Work Profession, Amar Ghelani Jan 2020

Deconstructing The Racialized Cannabis User: Cannabis Criminalization And Intersections With The Social Work Profession, Amar Ghelani

The Journal of Sociology & Social Welfare

Cannabis users have been historically stigmatized and criminalized for non-violent behaviors such as consuming, producing, and distributing cannabis. Racialized cannabis users in particular have been constructed as fundamentally different, dangerous, and mentally unstable, while state actors have benefited from the subjugation of this group. The following article reviews the history of cannabis prohibition with an emphasis on the social construction of racialized cannabis users and role of social workers in the treatment of this group. As laws liberalizing cannabis use and trade are passed across North America, an emergent legal framework is maintaining racial divides and marginalizing non- White cannabis …

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Childhood Snap Receipt As A Protective Factor Against Adult Obesity: Examining The Interaction Of Snap Participation And Neighborhood Disadvantage, Thomas Vartanian, Linda Houser Jan 2020

Childhood Snap Receipt As A Protective Factor Against Adult Obesity: Examining The Interaction Of Snap Participation And Neighborhood Disadvantage, Thomas Vartanian, Linda Houser

The Journal of Sociology & Social Welfare

Using the Panel Study of Income Dynamics (PSID) with family fixed-effects (FE) models, we explore how neighborhood conditions and time receiving SNAP benefits during childhood interact to relate to time spent obese in adulthood. Results suggest that, for those growing up in less advantaged neighborhoods, SNAP receipt between the ages of 9–13 and 14–18 was associated with subsequently shorter periods of time obese in adulthood. Conversely, for those growing up in more advantaged neighborhoods, SNAP receipt during these same late childhood/ adolescent time periods was associated with relatively high proportions of time in adulthood spent obese. SNAP participation during early …

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Journal Of Sociology And Social Welfare Vo. 47, No. 3 Jan 2020

Journal Of Sociology And Social Welfare Vo. 47, No. 3

The Journal of Sociology & Social Welfare

Complete issue of Journal of Sociology and Social Welfare Volume 47, Number 3

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After-School Childcare Arrangements And Maternal Labor Supply In Low-Income American Households: Comparisons Between Race And Ethnicity, Hyejoon Park, Min Zhan Dr., Shinwoo Choi Dr. Jan 2020

After-School Childcare Arrangements And Maternal Labor Supply In Low-Income American Households: Comparisons Between Race And Ethnicity, Hyejoon Park, Min Zhan Dr., Shinwoo Choi Dr.

The Journal of Sociology & Social Welfare

Even though after-school childcare arrangements are a significant matter for working mothers in the United States, only formal childcare has been recognized as relevant by researchers. Therefore, this study aims to find the association between different types of after-school childcare arrangements (after-school programs, relative, parental, self-care, and combination of care) and low-income working mothers’ labor supply, including their working hours and months, with special attention to their race/ethnicity. The study employed the Ordinary Least Squares regression analysis and utilized the National Household Education Survey Programs: After-School Programs and Activities (2005). The results showed that White and Hispanic mothers using relative …

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Political Climate, Discrimination, And Mental Health: Understanding Latino Youth Experience During The 2016 Presidential Election, Jaime Booth, Christina Huerta Jan 2020

Political Climate, Discrimination, And Mental Health: Understanding Latino Youth Experience During The 2016 Presidential Election, Jaime Booth, Christina Huerta

The Journal of Sociology & Social Welfare

In the last presidential election, Latino populations were the target of prejudicial language and discriminatory rhetoric. Experiences of discrimination may impact adolescent mental health, but little is known about the impact of the election cycle on Latino youth perceptions of discrimination and related emotional outcomes. The aim of this study was to understand Latino youths’ experiences, emotional reactions, and coping responses to discrimination surrounding the 2016 Presidential election. To do this, this study employed a qualitative approach that engaged 30 Latino youth ages 8 to 16 years old from Latino-serving social services agencies in the creation of art based on …

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Management Of The Brown-Headed Cowbird: Implications For Endangered Species And Agricultural Damage Mitigation, Brian D. Peer, Barbara E. Kus, Mary J. Whitfield, Linnea S. Hall, Stephen I. Rothstein Jan 2020

Management Of The Brown-Headed Cowbird: Implications For Endangered Species And Agricultural Damage Mitigation, Brian D. Peer, Barbara E. Kus, Mary J. Whitfield, Linnea S. Hall, Stephen I. Rothstein

Human–Wildlife Interactions

The brown-headed cowbird (Molothrus ater; cowbird) is unique among North American blackbirds (Icteridae) because it is managed to mitigate the negative effects on endangered songbirds and economic losses in agricultural crops. Cowbird brood parasitism can further affect species that are considered threatened or endangered due to anthropogenic land uses. Historically, cowbirds have often been culled without addressing ultimate causes of songbird population declines. Similar to other North American blackbirds, cowbirds depredate agricultural crops, albeit at a lower rate reported for other blackbird species. Conflicting information exists on the extent of agricultural damage caused by cowbirds and the effectiveness …

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A Pragmatist Context-Based Assessment Of The Economic Implications Of Eating Patterns In A Small Sub-Saharan Developing Economy: Focus On Togo, Corinne D. Tomta-Heinrich Jan 2020

A Pragmatist Context-Based Assessment Of The Economic Implications Of Eating Patterns In A Small Sub-Saharan Developing Economy: Focus On Togo, Corinne D. Tomta-Heinrich

Plymouth Business School Theses

Healthy nutrition is recognized as essential to a productive workforce and strategic in preventing healthcare costs. Meanwhile, food supply system proficiency requires socially coherent organizational efficiency. Sub-Saharan Africa is widely presented in agro-food economics literature as a cultural block whereas it enfolds context-specific nations with specific biophysical and historical ties. This thesis aims to determine the importance of investigating country-specific diets’ effects on economic welfare. Equally, it emphases national food system governance on which globalization, socio-economic and demographic transitions are increasingly influential. Normative, critical and grounded in poststructuralism and cultural/relativist pragmatism, the thesis shifts focus from generic material challenges emphasized …

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Breaking The Silence On Father-Daughter Sexual Abuse Of Adolescent Girls: A Case Law Study, Janine Benedet, Isabel Grant Jan 2020

Breaking The Silence On Father-Daughter Sexual Abuse Of Adolescent Girls: A Case Law Study, Janine Benedet, Isabel Grant

All Faculty Publications

Adolescent girls are targeted for sexual violence at a rate higher than females at any other life stage. Girls most often face sexual violence at the hands of men that they know and trust within their own families, yet this type of abuse has largely evaded scrutiny from the #MeToo movement. In this article, the authors seek to revitalize the discussion of sexual abuse against adolescent girls by their fathers. The article is part of a larger study that examined all Canadian judicial decisions involving sexual offences against girls between the ages of twelve and seventeen inclusive over a three-year …

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Environmental Law, Jocelyn Stacey Jan 2020

Environmental Law, Jocelyn Stacey

All Faculty Publications

In commemoration of their 50th anniversary, this chapter examines the Federal Courts’ role in shaping environmental law in Canada. The chapter uses well-known environmental principles – the precautionary principle, sustainable development and access to (environmental) justice – as focal points for examining environmental law as well as the legal culture of the Federal Courts. The chapter identifies four distinct interpretive roles that the Federal Courts have ascribed to the precautionary principle and it argues that three of these roles have the potential to generate more coherent and transparent doctrine that upholds the rule of law in the environmental context. In …

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First Comes Marriage, Then Comes Baby, Then Comes What Exactly?, Erez Aloni Jan 2020

First Comes Marriage, Then Comes Baby, Then Comes What Exactly?, Erez Aloni

All Faculty Publications

Taiwan’s legalization of same-sex marriage is an event of international importance concerning the rights of LGBTQ+ individuals and partners; further, it constitutes an opportunity to examine the state of LGBTQ+ equality in Taiwan and elsewhere. To this end, through theoretical and comparative lenses, this Article asks what equality for LGBTQ+ means and what comes after marriage. It offers perspectives on the past, present, and future of the intersection of same-sex marriage and equality. Looking at the path to same-sex marriage in Taiwan, the Article argues that the Taiwanese Constitutional Court’s ruling legalizing same-sex marriage maintained a line between domesticated liberty …

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Rethinking 'Duty': The City Of Toronto, A Stretch Of The Humber River, And Indigenous-Municipal Relationships, Doug Anderson, Alexandra Flynn Jan 2020

Rethinking 'Duty': The City Of Toronto, A Stretch Of The Humber River, And Indigenous-Municipal Relationships, Doug Anderson, Alexandra Flynn

All Faculty Publications

The nation-to-nation relationship between Indigenous peoples and cities remains largely unexplored in the Canadian context. This oversight is especially problematic in light of the significant percentage of Indigenous people who live in urban areas, and the many concerns that Indigenous and non-Indigenous peoples share. These shared concerns include the environment, land use, housing, social services, and much more, and modern municipalities do make attempts to address Indigenous-specific needs in these areas; but Indigenous-municipal relationships have implications that far exceed the technocratic and siloed ways in which Canadian systems generally approach these broad areas of concern - implications not only with …

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The Independence Effects Of Gravitational And Inertial Forces On Gait Transitions In Humans, Nathan Frakes Jan 2020

The Independence Effects Of Gravitational And Inertial Forces On Gait Transitions In Humans, Nathan Frakes

Cal Poly Humboldt theses and projects

The Dynamic Similarity hypothesis suggests gravitational and inertial forces plays a role in determining preferred transition speed (PTS) for walk to run transitions (WRT) and run to walk transitions (RWT), and that humans prefer to transition gait when the ratio of inertial force (IF) to gravitational force (GF) (i.e. Froude #) is ~0.5. Purpose: To investigate the effect of gravitational and inertial forces on PTS, Froude # (Fr) and kinematics for both WRT and RWT. Methods: Twelve healthy adults (9 M, 3 F) performed WRT and RWT trials on a treadmill across seven combinations of altered body weight (BW) and …

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Analyzing Lower Extremity Injury Profiles Of Pedestrian Traffic Fatalities According To Vehicle Type, Jacqulyn M. Scheer Jan 2020

Analyzing Lower Extremity Injury Profiles Of Pedestrian Traffic Fatalities According To Vehicle Type, Jacqulyn M. Scheer

Cal Poly Humboldt theses and projects

Skeletal trauma analysis of motor vehicle collisions has the potential to support or contradict reported collision circumstances. This project analyzed the skeletal injuries that pedestrians sustain in fatal collisions according to vehicle types (car, truck, SUV, van, bus, semi, etc.). Data were collected from reports and databases related to cases that occurred in King County, Washington. The pelvis and lower extremities of the body were analyzed for the frequency of skeletal fractures, grouped by pelvis, femora, patellae, tibiae, and fibulae skeletal groups. A Kruskal-Wallis test showed an overall no significant difference (P<0.05) in fracture quantity in skeletal regions between different vehicle groups. A multiple pairwise comparison using Dunn’s procedure also found no significant differences between vehicle type groups. A Partial Least Squares Discriminant Analysis showed an overall success rate of 37.29% when classifying injury profiles to vehicle type. The findings of this project can be applied to further research into the skeletal analysis of automobile versus pedestrian collisions. Low classification rates suggest that fracture frequency alone should not be used to assist in associating injuries with potential vehicle types in medicolegal investigations. Rather, the findings of this project lead the researcher to recommend that investigators and forensic practitioners move towards standardization in the quality and type of collected data—specific recommendations being the collection of actual speed and inclusion of full-body imaging in postmortem examinations to enable more detailed analyses.

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Aces & Trauma-Informed Practices For Children & Educators In Early Childhood Education, Ariel L. Llorente Jan 2020

Aces & Trauma-Informed Practices For Children & Educators In Early Childhood Education, Ariel L. Llorente

Cal Poly Humboldt theses and projects

Adverse Childhood Experiences (ACEs), consist of the negative and traumatic events that have happened in the early years of a person’s life. The focus here is on childhood trauma. There are many types of trauma, including, physical, sexual and emotional abuse, physical and emotional neglect, exposure to domestic and general violence, as well as household substance abuse, mental illness, racism, parental separation/divorce, and others. Trauma produces both physical and psychological challenges and can disrupt the brain’s development from birth through 18 years of age, causing permanent damage and issues, which we will discuss throughout this thesis. This thesis will explore …

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A Tale Of Two Cervids: Habitat Selection And Spatial Ecology Of Roosevelt And Tule Elk In California, Adam S. Mohr Jan 2020

A Tale Of Two Cervids: Habitat Selection And Spatial Ecology Of Roosevelt And Tule Elk In California, Adam S. Mohr

Cal Poly Humboldt theses and projects

California’s Roosevelt (Cervus canadensis rooseveltii) and tule elk (C. c. nannodes) populations have experienced a remarkable recovery after over-hunting and habitat loss nearly extirpated them from the state. Greater clarity of Roosevelt and tule elk habitat selection patterns would help managers continue to effectively support the recovery of these two iconic subspecies. As the manner in which elk populations balance their competing resource needs is unique to each population (Skovlin et al. 2002), I have examined Roosevelt and tule elk habitat selection patterns in separate analyses and present these results in independent chapters. In both cases, …

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Changes In Prey Mortality: The Efects Of Multiple Predators And Temperature On California Mussels, Wesley Hull Jan 2020

Changes In Prey Mortality: The Efects Of Multiple Predators And Temperature On California Mussels, Wesley Hull

Cal Poly Humboldt theses and projects

Organisms serve as prey to a variety of predators within natural systems, detecting threats through physical and chemical means. While predator feeding behavior is also affected by the presence of other predators, it is unclear whether differing modes of detection have similar effects on predator feeding behavior. In rocky intertidal zones in northern California, the California mussel (Mytilus californianus) is a competitively dominant foundation species consumed by a variety of predators. I quantified the individual and combined effects of ochre star (Pisaster ochraceus) and rock crab (Romaleon antennarium) predation on mussels by implementing mussel …

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The Ability Of Fragmented Kelp Forests To Mitigate Ocean Acidification And The Effects Of Seasonal Upwelling On Kelp-Purple Sea Urchin Interactions, Kindall A. Murie Jan 2020

The Ability Of Fragmented Kelp Forests To Mitigate Ocean Acidification And The Effects Of Seasonal Upwelling On Kelp-Purple Sea Urchin Interactions, Kindall A. Murie

Cal Poly Humboldt theses and projects

Bull kelp (Nereocystis leutkeana) forests along the coast for northern California have decreased dramatically as a result of a ‘perfect storm’ of multiple environmental stressors. The disappearance of a predatory sea star and subsequent increase in purple sea urchins (Strongylocentrotus purpuratus) and the recurrence of marine heat waves have caused these once diverse ecosystems to be rapidly converted into relative species-depauperate urchin barrens. By examining the interactive effects of both a rapidly changing abiotic environment and the increase in urchin grazing pressure that is affecting this vital ecosystem, we can better understand its ultimate fate and …

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Neurodegenerative Modeling: Tau Protein, Degradative Pathways, And Gene Expression Profiling Of Human Ipsc-Derived Neural Precursors And Differentiated 3-D Neural Sphere Versus 2-D Monolayer Cultures, Kyle H. Anthoney Jan 2020

Neurodegenerative Modeling: Tau Protein, Degradative Pathways, And Gene Expression Profiling Of Human Ipsc-Derived Neural Precursors And Differentiated 3-D Neural Sphere Versus 2-D Monolayer Cultures, Kyle H. Anthoney

Cal Poly Humboldt theses and projects

Human induced pluripotent stem cells offer a model for human brain development and disease by differentiation into brain organoids; however, current neural culture systems lack the microenvironment, neuronal circuits and connectivity, vascular circulation, and immune system that exist in vivo. After differentiation and development of neuronal and non-neuronal cell types within two formats of cell cultures, we can visualize and recapitulate in vivo protein accumulation, gene expression, and degradative processes such as autophagy. Using RNA extraction, purification methods and reverse transcription I compared traditional monolayer cultures and novel 3-D neural sphere cultures via gene expression analysis. This analysis indicated …

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Coho Salmon (Oncorhynchus Kisutch) Dispersal And Life History Variations Among Humboldt Bay Watersheds, Madison J. Halloran Jan 2020

Coho Salmon (Oncorhynchus Kisutch) Dispersal And Life History Variations Among Humboldt Bay Watersheds, Madison J. Halloran

Cal Poly Humboldt theses and projects

The decline of Coho Salmon (Oncorhynchus kisutch) in California is the result of various anthropogenic effects across the landscape, affecting all stages of their anadromous life history. Monitoring a subset of the remaining populations is essential to evaluate the success of management actions and develop new restoration projects. Defining the appropriate spatial scale for this monitoring and restoration depends on the frequency and extent of dispersal of individuals across watershed boundaries. Coho Salmon life-cycle monitoring projects in California estimate the abundance of juveniles and adults over time in selected focal watersheds. If individuals frequently enter or leave the …

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Estimates Of Calf Survival And Factors Influencing Roosevelt Elk Mortality In Northwestern California, Erin Nigon Jan 2020

Estimates Of Calf Survival And Factors Influencing Roosevelt Elk Mortality In Northwestern California, Erin Nigon

Cal Poly Humboldt theses and projects

Survival of juvenile ungulates is known to be highly variable, yet it is fundamental to understanding the dynamics and trends of wildlife populations. Factors influencing calf survival are poorly understood in northwestern California where Roosevelt elk (Cervus canadensis roosevelti) are known to exist. The objectives of this study were 1) to estimate summer and annual survival rates and determine recruitment rates for Roosevelt elk calves in the area, 2) to evaluate differences in calf survival by examining the effects of individual and population level covariates on summer and annual calf survival, 3) to identify factors influencing the timing …

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Shifting Sands: Social Cues Influence The Long-Term Dynamics Of Snowy Plover Distribution, Jeremy John Pohlman Mr Jan 2020

Shifting Sands: Social Cues Influence The Long-Term Dynamics Of Snowy Plover Distribution, Jeremy John Pohlman Mr

Cal Poly Humboldt theses and projects

Understanding the social and physical factors that influence the temporal and spatial distribution of a species is imperative for successful management. The Western Snowy Plover (Charadrius nivosus nivosus) selects for wide-open stretches of beach; yet within large expanses of ideal habitat, plover populations tend to be aggregated. Recent evidence suggests plovers may prioritize social information over ideal physical factors alone when selecting breeding locations. I analyzed data collected on an individually marked population of Snowy Plovers in Humboldt County, California from 2001 to 2018 to evaluate the influence of physical (beach width) and social (presence of conspecifics) landscape …

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Impacts Of Flow Releases On Invertebrate Drift And Juvenile Chinook Salmon (Oncorhynchus Tshawytscha) Diet On The Trinity River Below Lewiston Dam, Thomas R. Starkey-Owens Jan 2020

Impacts Of Flow Releases On Invertebrate Drift And Juvenile Chinook Salmon (Oncorhynchus Tshawytscha) Diet On The Trinity River Below Lewiston Dam, Thomas R. Starkey-Owens

Cal Poly Humboldt theses and projects

Benthic macroinvertebrate (BMI) drift, species composition and abundance are specific to local hydrologic and habitat conditions, which can restrict or enhance availability to salmonids as a food resource. Currently, a knowledge gap exists on the Trinity River (northern California) in how flow releases from Lewiston Dam potentially impact BMI drift and feeding opportunities for juvenile salmonids. Samples of BMIs from drift, benthos, and diets of juvenile Chinook salmon (Oncorhynchus tshawytscha) were collected from two sites in the upper Trinity River February-April 2018, during stable flow conditions (~8 ) and two increased flow conditions peaking at ~50 . Chironomidae …

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"This Is Home:" Pictures, Place Meaning, And Community In The Natural-Amenity-Rich Del Norte County, California, Erik Arndt Jan 2020

"This Is Home:" Pictures, Place Meaning, And Community In The Natural-Amenity-Rich Del Norte County, California, Erik Arndt

Cal Poly Humboldt theses and projects

This study contributes to the existing, yet small, cadre of research using photo elicitation to investigate the place meanings of people living in a natural-amenity-rich area. Ten current and former residents of Del Norte County, California took pictures of and discussed in an interview the people, places, and attributes they found valuable or meaningful about that place. The primary focus of the photos and interviews was how these natural amenities, in particular Jedediah Smith Redwoods State Park, impacted or influenced residents’ place meanings. Three major themes of place meaning were identified from the interviews: Environment-Landscape, Human-Social, and Recreation-Exploration. Each contained …

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You Have A Voice Here: Implementing Armenian Feminist Literature Within Feminist Discourse, Grace Hart Jan 2020

You Have A Voice Here: Implementing Armenian Feminist Literature Within Feminist Discourse, Grace Hart

Cal Poly Humboldt theses and projects

This project melds personal narrative with literary criticism, as it excavates the literature of Armenian writer and political activist Zabel Yessayan, particularly with her novel My Soul in Exile and memoir The Gardens of Silihdar. I argue that the voice of Zabel Yessayan should be included in the feminist women of color discourse within institutions in the United States. I develop this argument by bringing in the works of Cherríe Moraga and Gloria Anzaldúa’s anthology This Bridge Called My Back: Writings by Radical Women of Color and showing parallels in themes and lenses such as excavating traumatic histories, the …

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Effects Of Extreme Behaviors And Outbursts In Kindergarten Classrooms, Christine M. Ng Jan 2020

Effects Of Extreme Behaviors And Outbursts In Kindergarten Classrooms, Christine M. Ng

Cal Poly Humboldt theses and projects

This study explored extreme behaviors and violent outburst in kindergarten classrooms and the affect they had on other students as observed by their teachers. A mixed methods study design was used, and included a survey and interviews. Quantitative data was collected to understand what teachers are experiencing as a group, and qualitative data expanded on those experiences. The data revealed the variety of extreme behaviors exhibited by some students, and the ways other students and staff both in the classroom and at the school site are affected by them. One of the primary findings is that a lot of time …

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The Rattle Call: A Female-Specific Vocalization In Steller's Jays, Kachina L. Rowland Jan 2020

The Rattle Call: A Female-Specific Vocalization In Steller's Jays, Kachina L. Rowland

Cal Poly Humboldt theses and projects

While the elaborate songs of male passerines are well documented for their role in intrasexual resource competition and mate attraction, vocalizations used in female competition are poorly understood. Research has suggested that the female-specific rattle call of Steller’s jays (Cyanocitta stelleri) is used in competition for access to a territory and mate. I describe structural properties of the rattle call, and compare life history traits of individual females to rattle call occurrence. I used two rates to quantify rattle call occurrence from 20 females: rattles per observation period (RPO), and proportion of observations with a rattle call (POR) …

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Spatiotemporal Partitioning Of Mammalian Mesopredators In Response To Drought And Urbanization In California's Central Valley, Chad W. Moura Jan 2020

Spatiotemporal Partitioning Of Mammalian Mesopredators In Response To Drought And Urbanization In California's Central Valley, Chad W. Moura

Cal Poly Humboldt theses and projects

Mammalian mesopredators commonly associated with human dominated landscapes often exhibit generalist diets, behavioral plasticity, and relatively high reproductive rates. Because of this wide range of adaptive traits, ecologists have been speculative of what conditions may drive species to change their activity and behavior to avoid or mitigate against resource competition, intraguild predation, and human disturbance. I investigated a community of common mesopredators within the Sacramento Metropolitan Area of California’s Central Valley to address whether species are spatially and/or temporally partitioning due to a defacto apex predator, coyotes (Canis latrans), and humans alongside large landscape altering disturbances: urbanization and drought. I …

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Knemidokoptes Mites And Their Effects On The Gripping Position Of Steller’S Jay Feet, Wade M. Burris Jan 2020

Knemidokoptes Mites And Their Effects On The Gripping Position Of Steller’S Jay Feet, Wade M. Burris

Cal Poly Humboldt theses and projects

Steller’s jays (Cyanocitta stelleri) with swollen legs and feet resembling the signs of scaly leg have been commonly seen around Arcata, California, USA. These signs are thought to be caused by knemidokoptic mites, a group of parasites specialized at exploiting a range of avian hosts. I compared the gripping position in the feet of jays with variable signs of this condition as an index of their ability to perch, confirmed the presence of mites and identified them to the nearest species using genetic analysis, and compared the relatedness of the cytochrome oxidase subunit I (COI) gene between mites …

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An Ecomorphological Analysis Of Locomotion In Larvae And Neotenes Of Two Salamander Species: Dicamptodon Tenebrosus (Stream-Type) And Ambystoma Gracile (Pond-Type), Ethan Hardister Snee Jan 2020

An Ecomorphological Analysis Of Locomotion In Larvae And Neotenes Of Two Salamander Species: Dicamptodon Tenebrosus (Stream-Type) And Ambystoma Gracile (Pond-Type), Ethan Hardister Snee

Cal Poly Humboldt theses and projects

Morphology is the physical expression of a species’ evolutionary history and adaptation to its environment and as such is tied to ecology. Salamander larvae have historically been separated into "pond-type" and "stream-type" groups based on their morphology, however no studies have been performed quantifying the relationship between morphology and ecology. In this study I utilized in-situ behavioral observations, morphological measurements, and in-lab performance tests of Dicamptodon tenebrosus (stream-type) and Ambystoma gracile (pond-type) to examine the relationship between salamander larval morphology and ecology. In the field, behavior was video recorded during nighttime surveys; afterwards animals were captured and limb measurements were …

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Assessing Methods For Estimating Biological Sex From Subadult Skeletal Elements, Dorota Zabnicka Jan 2020

Assessing Methods For Estimating Biological Sex From Subadult Skeletal Elements, Dorota Zabnicka

Cal Poly Humboldt theses and projects

While methods for estimating the sex of adult skeletons are relatively accurate, these methods are often inconclusive when applied to subadults (non-adults), especially when many secondary sexual characteristics have not fully developed. Furthermore, existing methods for subadults are often tested on samples with relatively homogenous ancestries, calling into question their reliability in more diverse populations. This thesis reviewed techniques for estimating sex in subadult skeletal remains, and the most promising methods were retested on individuals of known sex between ages 3 and 17 years (n=39, 14 males, 25 females) from the Hamann-Todd Osteological Collection. Data collection included measurements of the …

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