Now showing items 1-20 of 60

    • Assessing whether Time Management Impacts Perceptions when it comes to Prioritizing Healthy Eating Habits by Consuming More Home-Cooked Meals

      Domingos, mariane (2024)
      Purpose: To assess whether an increase in time management, organization and goal setting skills, and perceived level of self-efficacy facilitated meal planning and preparation of homecooked meals. Design: Quasi-experimental design, pre- and post- surveys, and online education sessions. Setting: Private nutrition practice (Rural Roots PLLC). Participants: Clients of a private nutrition practice (Rural Roots PLLC). Measures: Pre- and post-education surveys administered in an online platform were used to assess changes related to time management, organization, and goal setting skills and whether such changes led to a higher frequency of home-cooked meals. Analysis: Wilcoxon Signed-Rank Test. Results: The contrast in pre- and post-test survey scores determined that the online education videos on time management and meal planning/preparation techniques did not elicit a statistically significant (P<0.05) change in increasing meal planning and preparation of whole-food meals at home and less intake of take-out, processed foods. Conclusion: Although this study did not show a statistically significant correlation in this matter, similar studies show a correlation between time management/organization skills and increased engagement in positive health habits. Additional research is needed in the topic.
    • Past vs. present: A survey of the fish parasites of the tributaries of Oneida Lake, NY

      Whitcomb, Hannah (2024)
      In 1934, Van Cleave and Mueller completed a study of the parasite fauna of the fish in Oneida Lake and its tributaries, where they documented over eighty species of parasites, thirty-three of which were new descriptions. Since 1934, the lake has undergone many environmental changes which have impacted the invertebrate fauna, mollusks in particular. The present study is a fish parasite survey of twelve tributaries of Oneida Lake undertaken to compare our results to Van Cleave and Mueller’s survey. The methods of this study included the collection of thirty-three fish species via backpack shocking, e-boat and hook and line fishing, partial necropsy of fish to collect parasites and the mounting of parasites for identification using light and scanning microscopes. During the recent survey of the lake, certain species of trematodes that had been reported by Van Cleave and Mueller were considered ‘missing’. Some of the missing species of parasites were found in the survey of the tributaries. For example, we encountered the trematode Bunodera sacculata in seven of twenty-six Perca flavescens. Bunodera sacculata uses a native clam as its first intermediate host, which is thought to have been extirpated from the lake due to invasive species. Additionally, thirty-two species were documented from three other major groups. This survey fills a knowledge gap on the fish parasite data in the tributaries and will add to the current survey knowledge of the lake system. Through an extensive survey of the fish parasites in Oneida Lake’s tributaries, the comparison of my results to Van Cleave and Mueller’s study demonstrates the parasite community in the tributaries are differs from those found in the lake because of several years of change to the watershed.
    • Parasites of Freshwater Fish of the eastern Everglades

      Sawickij, Katerina Demeitrovna (2024)
      A survey of fish parasites was conducted in the Everglades, Florida and examined 31 species of fish from 15 locations across Lake Okeechobee, Stormwater Treatment Area 3/4 (STA-3/4) and Water Conservation Areas (WCA) 3A and 3B. We documented 30 species of parasites, 19 of which were found as adults from the intestines of fishes. We collected 15 of the fish species and 16 of the parasite species that were examined/documented in Bangham’s 1938 survey. Thirteen established non-native fish species were examined and were found to host 14 species of parasites. There was 1 new species, 19 new host records for 5 species of parasites, and 4 new locality records documented. These new records demonstrate the need for parasite surveys in understudied areas of North America (like the southeastern region) to better understand what species are present and what species are utilized as hosts. The changes in the parasite communities in the area demonstrate the extensive environmental changes of the region. A new species of Neoechinorhynchus was discovered in Largemouth Bass in Florida and is described here. A previously known species, Neoechinorhynchus doryphorus, was re-encountered in the Florida Everglades and redescribed here as well.
    • Population Abundance of Spawning Lake Sturgeon in the St. Lawrence River

      Skelton, John D (2024)
      The Lake Sturgeon Acipenser fulvescens is a large, long-lived freshwater fish that completes its entire lifecycle in freshwater, but migrates long distances. Human modifications to critical spawning habitats and migration corridors due to pollution and dams, coupled with high historical fishing mortality, have reduced most populations to all-time low abundances. In New York, USA, the species remains listed as threatened but recovery efforts including fishing moratoria, propagation and stocking, and habitat improvements have recovered 4 of the 7 remaining distinct population segments to interim targets for abundance. We assessed trends in Lake Sturgeon population abundance at two artificial spawning beds near Iroquois Dam for the aggregations on either side of the impassable barrier in the St. Lawrence River, North America. Fish were counted on 10 replicated video transects throughout the spawning season from 2011 through 2022 using underwater video. Counts of Lake Sturgeon in 30 m × 30 m grid cells along these transects were used to estimate population density at spawning beds upstream and downstream of the dam while accounting for imperfect detection within spatially explicit count models. Overall detection probability of the sturgeon was low (mean: 0.04, 95% CRI: 0.006-0.113) but was highest during the middle of the spawning season, reaching a maximum of 0.12 (0.10-0.13). Mean abundance was 10 (0-58) fish per 900 m2 at the downstream bed and 5 (0-30) at the upstream bed, with a mean difference of 5 (4-6) fish per 900 m2 across years. Periodicity in abundance was noted at the downstream bed. Abundance decreased slightly 2011-2023, with a mean population growth rate of -0.006 (-0.017 to -0.001) across beds. The approach we adopted for analysis could potentially be adapted to a wide range of data sources within Lake Sturgeon monitoring programs, particularly if combined with auxiliary demographic information. Future studies could improve understanding and interpretation of trends from these models with information regarding immigration and emigration from the study area and recruitment to this population segment.
    • Does the implementation of nutrition education improve habits and nutritional knowledge in elementary students

      Romero, Isabella (2024)
      Objective: Assess the effect of nutrition education on the knowledge and habits of elementary students in order to determine effective ways to improve healthy habits Design: Quasi experimental design Setting: Ossining Elementary School, in person Participants: Elementary students (n=18) ages from 9 to 10 Intervention: A one day nutrition education PowerPoint lesson on the five food groups/ vitamins and an activity. The effects were measure using a pre- and post- exam taken by each participant. Hypothesis: The implementation of the intervention will improve the student's nutritional knowledge as well as excite the students to continue to learn about nutrition among elementary school children at Ossining Elementary school. Results: The primary finding resulted the implementation did impact the student’s nutrition knowledge positively. Conclusion: The study can conclude the implementation of nutrition education did increase the elementary student’s knowledge of the five food groups and vitamins.
    • Assessing The Effectiveness of Using Nutrition Intervention Utilizing Behavior Change Techniques (BCT) on Nutrition Knowledge and Confidence Levels Among Older Adults

      Holohan, Erin, J (2024)
      Objective: To evaluate the effectiveness of the nutrition intervention design using behavior change techniques (BCT) on nutrition knowledge and confidence levels among older adults. Design: Quasi-experimental. Methods: Nutrition knowledge and confidence levels were evaluated using a pre- and post-test. Final scores were compared using sample t-tests and the IBM SPSS statistical software. Setting: Congregate meal site in Ilion, NY. Participants: 6 individuals agreed to participate in the study. Participants were recruited at the congregate meal site in Ilion, NY between February, and March 2023. Intervention: A nutrition intervention using BCT, including 1 group educational session and 3 cooking demonstrations lasting 15 minutes each were given to participants in a group-setting. Results: There was no significant difference among final scores in nutrition knowledge or confidence levels post-intervention. Conclusions and Implications: This intervention design using BCT is not an effective way to affect nutrition knowledge or confidence levels among participants.
    • Positive Pathways 4-Week Self-Paced Virtual Nutrition and Lifestyle Program

      Krause, Brittney Marie (2024)
      Objective: To evaluate the effectiveness of joining a four-week self-paced nutrition and lifestyle program with weekly meetings led by nutrition experts alongside other adults seeking a comprehensive approach to developing substantial healthy habits. Methods: The effectiveness of the program was assessed via pre- and post-survey and analyzed using the Wilcoxon test via SPSS Statistics software. Setting: Virtual (synchronous and asynchronous) Participants: In March of 2024, 4 adults enrolled in the program. Intervention: The participants completed the virtual program over 4 weeks in 2024. Results: The primary findings of this study were that a 4-week virtual nutrition and lifestyle program did not elicit a statistically significant change in the nutrition confidence in individuals Conclusion: In conclusion, results from the present study indicated the 4-week self-paced nutrition and lifestyle program impacted participants' behavioral confidence but not significantly enough to know if changes in sustainable habits will follow.
    • Assessing the Effectiveness of a Self-Efficacy and MyPlate-Based Intervention on Nutrition Knowledge of Crunch Fitness Members

      Drago, Serena G (2024)
      Background: Nutrition-related chronic diseases represent a significant health and economic burden in the United States. Despite established dietary guidelines, a gap exists in translating nutrition knowledge into lifestyle choices, particularly among individuals engaged in regular exercise, necessitating targeted interventions to bridge this knowledge gap. Objective: To evaluate the effectiveness of the nutrition education intervention designed to increase nutrition knowledge in Crunch Fitness members. Methods: A quasi-experimental design study and pre/post-intervention assessments were used to measure the effectiveness of two 60-minute intervention sessions based on enhancing self-efficacy through the Social Cognitive Theory, improving knowledge about MyPlate, food groups, and the drawbacks of short-term diets to Crunch Fitness members (n=12) voluntarily participating in the intervention. Participants underwent pre- and post- intervention surveys, with a follow-up survey one month later. Independent two-sample t tests were used to assess for significant changes in nutrition-related knowledge/skills and improvement in self-efficacy. Results: The results reveal there was a significant difference in posttest scores when compared to the pretest scores of the knowledge section of the survey immediately following the intervention (p =.001) and at the one-month follow-up (p =.025). For the self-efficacy questions section of the survey, results reveal there was a significant difference in posttest scores when compared to pretest scores, (p =.002) immediately following the intervention, but not at the one-month follow up (p=.054). Conclusion: In conclusion, the nutrition education intervention given at Crunch Fitness effectively increased participants' nutrition knowledge long-term, as evidenced by significant improvements in posttest survey scores one-month following the intervention
    • Evaluating the Effectiveness of a Hydration Education Session on the Older Adult Population’s Knowledge of Hydration Needs

      Jacullo, Alyssa R (2024)
      Background: Dehydration is one of the most common causes of hospitalizations in the older adult population. As we age our thirst sensation decreases, increasing our risk for dehydration. Older adults are at a greater risk of dehydration due to body composition changes. The purpose of this study was to assess the effectiveness of an education session on increasing the awareness and importance of maintaining proper hydration and the possible implications associated with decreased hydrations status. Objective: To evaluate the effectiveness of a lesson on hydration importance in the older adult population. Methods: Twenty-five participants were provided an education lesson on hydration needs and importance of hydration in the older adult population. The participants were given a pre and post-test to complete before and after the lesson. The total score of the pre-test and post-test were compared. Confidence in hydration knowledge was also captured on the post-test. The quantitative data collected from the pre and post-tests and were compared using paired t-tests with a p value of <0.05 as statistically significant. Participants: 25 older adults (ages 65 or older) participated in the study. Intervention: A 30-minute lesson plan which explained the importance of hydration in the older adult population was given at the St. Barts facility. Results: From the intervention education session, there is statistical significance between the education session and the knowledge of the older adults based on the mean of the total scores increasing from the pre and post-test. The data proved to be statistically significant, that after the education session the 25 participants felt more confident in their ability to meet their hydration requirements each day. The participants also were able to understand how important hydration status is and what some of the common signs and symptoms are to help prevent becoming dehydrated. For this study specifically it was important to determine the increase in knowledge and understanding of how important hydration is to the participants overall health. Conclusion: The hydration education session was effective in teaching the older adults the importance of hydration in this population. It is imperative to continue to provide hydration education to this vulnerable population to help eliminate unnecessary hospitalizations and shorten the length of stay while in the hospital.
    • Impact of Eating Disorder Course for Nutrition Students: Shifts in comfort, confidence, and eating disorder knowledge

      Haefele, Jennifer (2024)
      ABSTRACT Objective: To evaluate the effectiveness of an educational intervention to improve comfort, confidence, and knowledge in working with eating disorders for nutrition students Design: Quasi-experimental Methods: The study examined the impact of a four-module course on nutrition students’ (nutrition undergraduate, dietetic internship, or graduate) comfort and confidence levels in working with individuals with eating disorders, risk of development of an eating disorder, and their knowledge of working with eating disorders. The study employed a pre-test/post-test design to assess changes in participants before and after the intervention. Setting: Virtual administration Participants: 5 participants completed pre- and post-test data Intervention: Participants completed a four-hour course on eating disorders written by an eating disorder expert in the spring of 2024. Results: The use of an eating disorder course for nutrition students increased students’ self-reported levels of confidence and comfort when thinking about working with eating disorders in their future careers. There was not a significant difference in pre-test and post-test knowledge assessment, however participants’ scores remained the same or increased. The average of the participants’ pre-test and post-test EAT-26 assessment did not show a significant change. Conclusions and Implications: The use of an eating disorder course for nutrition students has the potential to improve student comfort and confidence in working with eating disorders, as well as their overall knowledge of nutrition counseling for eating disorders. It is imperative to continue to consider the impact that eating disorder education may have on the risk of eating disorder development for nutrition students.
    • An Early Enteral Nutrition (EEN) Protocol for Adult Critically Ill Patients

      Usher, Megan E (2024)
      Background: Enteral nutrition (EN) is the preferred feeding route for critically ill patients who are unable to maintain volitional intake due to intubation with mechanical ventilation, as it attenuates the metabolic response to critical illness. Established guidelines support early EN (EEN) initiation within the first 24-48 hours of intubation to improve various clinical outcomes. Objectives: To determine if implementation of an EEN protocol increases the number of patients that receive EEN within 48 hours of intubation, as well as to assess the effect of EN timing on certain nutritional and clinical patient outcomes. Methods: A quasi-experimental, single-center, retrospective study involving analysis of electronic medical record (EMR) data of critically ill, intubated and mechanically ventilated, adult patients admitted to two ICUs of a community hospital was performed before (control group) and following implementation of the protocol (intervention group). The EEN protocol involved a flowchart and education sessions for staff. Demographic, clinical, and nutrition data were collected and analyzed. Results: The EEN protocol resulted in a statistically significant increase the number of patients that received early EN (p = <0.001), from 33.3% to 74.1% of patients, but this did not translate into a reduction in the primary nutrition endpoints of constipation and pressure injury progression or development, nor other clinical patient outcomes of reduced mechanical ventilation duration, mortality, or ICU and hospital length of stay (LOS). Conclusions: Implementation of an EEN protocol successfully increased the number of patients that received EEN within the recommended 48 hours of intubation, however, patient outcomes did not improve as intended. A larger study of longer duration may have been more efficacious.
    • Assessing the Effectiveness of a Health-Belief Model-Based Intervention on the Nutrition Knowledge, Health Beliefs, and Behaviors of Adult Participants of the YMCA

      Knaust-Wood, Reidun (2024)
      Background: Nutrition is foundational for athletes to achieve optimal athletic performance and to promote proper recovery while reducing the risk of injury. Many lack nutrition-related knowledge, health beliefs, and behaviors pertaining to general and sports nutrition to do so. Objectives: To assess the effectiveness of a health belief model-based intervention for improving nutrition-related knowledge, health beliefs, and behaviors. Methods: A quasi-experimental design study and pre/post-intervention assessments were used to measure the effectiveness of an online health belief model-based intervention program in improving nutrition-related knowledge, health beliefs, and behaviors of adult participants (n = 4) of the YMCA. Mann-Whitney U tests were used to assess for changes in significance in nutrition related knowledge, health beliefs, and behaviors. Results: The intervention did not produce improvements in nutrition-related knowledge, health beliefs, and behaviors of statistical significance related to general and sports nutrition. Conclusions: The discrepancies in the findings of the current study and prior studies relating to the effectiveness of the intervention’s theoretical framework in producing improvements in general and sports nutrition related knowledge, health beliefs, and behaviors may suggest that the current studies’ unequal, small sample size resulted in the inability to determine statistical significance.
    • Effectiveness of Nutrition Education Intervention in Schenectady County Meal Site Participants

      Mazzola, Christine (2024)
      Background: The rapid growth of the aging population presents challenges for the healthcare industry. Increased longevity is often accompanied by higher risk of chronic disease, functional impairment, and food insecurity. Programs offered by Offices of the Aging seek to combat these issues through the provision of meals, nutrition education, physical activities, social activities, and health screenings. A needs assessment conducted at Schenectady County congregate meal sites revealed a high prevalence of cardiovascular disease and, despite educational offerings, significant nutrition knowledge deficits. Objective: To evaluate the effectiveness of multiple sessions of heart-healthy nutrition education on congregate meal site participants’ nutrition knowledge, dietary habits, and blood pressures. Methods: 16 participants were recruited at the Glenville meal site. Changes in dietary habits and nutrition knowledge were evaluated by comparing FFQ and nutrition knowledge assessment data collected during the needs assessment to post-intervention results. Changes in blood pressure were evaluated by comparing pre- to post-intervention measurements. Results: There were non-significant increases in overall nutrition knowledge assessment scores, as well as the scores for questions pertaining to the salt and fat content of foods. There were no significant changes in dietary habits or blood pressure measurements as compared to baseline. Conclusions: Further research is needed to evaluate whether more educational sessions over a longer duration of time might be more effective at impacting changes in nutrition knowledge, dietary behaviors and health outcomes.
    • Factors impacting the post release viability of American Burying Beetle (Nicrophorus Americanus Oliver) to New York

      Pipino, John A (2024)
      Effects of rapid decline in species numbers often pressures practitioners to rely on both theoretical deduction and observational based evidence when making decisions about reintroductions. The reintroduction of a species cannot be deemed a success simply due to the translocation of a species to its historic home range. Success in reintroduction is often defined as the establishment of a self-sustaining population of locally born individuals. Efforts to reintroduce the endangered American burying beetle (Nicrophorus americanus; ABB) from the extant population on Block Island, RI back to NY are underway. Our research focused on factors which may impact the survival of ABB once reintroduced to NY. Carrion is an ephemeral resource which burying beetles (Nicrophorus spp.) rely upon in raising their brood. Competition for this resource is fierce among burying beetles, carrion flies, and vertebrate scavengers in the northeastern US. Results of our carrion competition study determined that the congener, N. orbicollis will be the competitor that ABB will most likely face during their reproductive season. Our olfactometry study comparing overwinter site selection choices of two populations of N. orbicollis (RI, NY) indicated no significant difference among the choices made. Results from our overwinter survival study in NY forests comparing the survival rates of two populations of N. orbicollis (RI, NY) determined that population significantly affects the rate of overwinter survival. Our results will aid in decisions regarding the timing of ABB reintroduction, site considerations, and the number of ABB released.
    • The Effects of Nutrition Education on Perceived Nutritional Food Intake in Food Bank Participants in Delaware County

      Wilbur, Joanna A (2024)
      ABSTRACT Objective: To evaluate the effectives of nutritional interventions in a food bank setting aimed to improve the perception of the availability of nutritious food items. Design: Quasi-experimental design study and pre/post-intervention assessments Methods: Food Bank participant nutritional knowledge and confidence levels in their ability to produce nutritious meals with food received from the food bank was evaluated pre and post nutritional intervention. Setting: Delaware Opportunities, Hamden NY Participants: Ten people who were utilizing the Delaware Opportunities Food Bank Intervention: Participants were provided a recipe based on ingredients available at the food bank, a food demonstration of said recipe and a traffic light labeling system accompanied by education and explanation of the categorization. Results: Nutritional knowledge significantly increased post intervention, however participant confidence in their ability to produce nutritious meals based on food items received from the food bank did not significantly increase. Conclusion and Implications: traffic light labeling, recipe development, and food demonstration provided at the Delaware Opportunities Food Bank significantly improved participant nutritional knowledge related to the food available but did not significantly increase participant confidence to create nutritious meals moving forward. The results as well as relevant literature suggest that more long-term interventions are needed to improve confidence in a meaningful way.
    • The effectiveness of an online-directed sports nutrition education program for adult triathletes

      Hunt, Joshua David (2024)
      Background: Triathlon is a physically demanding sport that many adults partake in to live a healthy lifestyle. Research has shown that individuals who partake in this sport have the potential to improve their nutrition knowledge. Adequate nutrition is vital for triathlon performance, especially as the distance increases. A needs assessment was conducted revealing the need for education in pre-workout, post-workout, and specific supplementation. Objectives: This study aims to determine the effectiveness of an online sports nutrition education program in adult triathletes. Methods: A four-week nutrition education program, including one optional food demonstration, tailored to the findings from the needs assessment was created. An abridged form of the Sports Nutrition Knowledge Questionnaire (SNKQ) was used along with questions created by the author of the study in this pre/post-test design. Results: Analysis was conducted using SPSS statistics, identifying a significant overall improvement in sports nutrition knowledge (p=0.01), and on supplements (p=0.04). Conclusions: On this basis, an online nutrition education program for adult recreational triathletes suggests remote delivery of nutrition education may be beneficial if an online option is deemed appropriate.
    • Providing Salt-Free and Sugar-Free Seasoning Blends to Adolescents and their Effect on Vegetable Intake in the School Environment

      Dudley, Shane P (2024)
      Objective: To evaluate the effect of providing sugar-free, salt-free spice blends on vegetable intake among adolescents Design: Quasi-experimental, case-control Methods: Subject selection, consumption, and enjoyment of vegetables served in school-offered meals was measured prior to the intervention period and again following 4 weeks of providing spice blends. Measurements were made using numerical and Likert scales along with open-ended solicitation of feedback. Setting: South Jefferson High School, Adams, New York Participants: High school students enrolled in health classes in the 2023-2024 school year (n=13). Intervention: Following a pre-test assessment, students were provided with optional spice blends in the lunch lines for 4 weeks. After the 4 weeks, a post-test was administered to measure the effect of the spices on vegetable selection, consumption, and enjoyment. Results: After 4 weeks, the spice blends did not produce significant changes in vegetable selection, consumption, or enjoyment among subjects. Conclusions and Implications: Herbs and spices have been demonstrated elsewhere to be effective methods for improving vegetable intake in the adolescent population.22,23 This study’s results suggest the need for further, more rigorous testing in the population.
    • The State of Round Lake

      Comerford, Sinéad Caitlín (2023)
      This thesis explores the state of Round Lake, a lake within the municipality of Round Lake Vil-lage, Saratoga County, New York State. In this thesis I describe and analyze lake monitoring efforts within Round Lake between 2020–2022 which were performed in order to create baseline data to be utilized in management and future monitoring within Round Lake and/or its watershed. Through my research data and monitoring efforts I describe the geomorphology, biochemistry, and ecology of Round Lake. In this thesis I argue that Round Lake is a highly productive eutrophic lake. I created a management plan based on research and data catered to the state of the lake according to the specific needs of the Village of Round Lake municipality, to be used as a refer-ence for management efforts by the municipality.
    • Population Dynamics of Spawning Walleye in Otsego Lake, NY

      Dower, Hayley B (2020)
      Walleye (Sander vitreus) are recreationally and ecologically important throughout New York State waterbodies. The species has been stocked throughout the state for purposes of establishing and enhancing recreational fisheries and biological control of landlocked alewife populations and milfoil management in the state. In populations supported by large-scale stocking efforts, we rarely collect information about natural reproduction. Walleye were stocked from 2000-2014 in Otsego Lake, New York for biological control of alewife (Alosa pseudoharengus) with a secondary purpose of re-establishing a recreational fishery. Following the functional elimination of alewife from the lake, walleye stocking ceased and their population has been supported only by natural reproduction. With the collapse of the alewife population and the increased popularity of a harvest-orientation for walleye, the status of the population and the ability to sustain a fishery into the future is currently uncertain. The purpose of this thesis was to characterize baseline population dynamics of spawning walleye in Otsego Lake, NY following successful re-introduction of the species and establishment of wild reproduction. To achieve this, the specific objectives of my thesis were to: 1) characterize spawning walleye demographics (age, growth, sex ratio, and size distribution), 2) estimate annual survival and population abundance of stream-spawning walleye in the lake, and 3) quantify variability in reproductive phenology as related to environmental cues to inform future sampling efforts. Sex ratios of spawning fish were heavily skewed toward males, but the proportion of females in spawning tributaries has increased in recent years. We found that mean size and age of spawning walleye varied between males and females but increased across sexes during the study period. Additionally, estimated population abundance decreased markedly from about 6,428 individuals in 2008 to 1,724 individuals in 2017 before stabilizing at about 868 individuals in 2018 and 748 individuals in 2019. Taken as a whole, these changes suggest that the naturally reproducing walleye population may be stabilizing at numbers lower than were sustained during years of active stocking, which may affect how harvest influences the population in the future. Finally, I was able to create predictive relationships between environmental variables of interest (date, photoperiod, and degree days) that were useful for predicting the initiation of spawning accurately and, with a precision of about one week, to facilitate more efficient sampling of this population in the future. The information provided by this study will facilitate future management of Otsego Lake. Continued monitoring of this population will help resolve or confirm some of the outstanding uncertainties related to current stock status and trends observed.
    • Age, Growth and Genetic Markers of Semelparous vs. Iteroparous American Shad (Alosa sapidissima) in the Upper Delaware River 2020-2021

      Best, Mathew J (2023)
      The goal of this study was to characterize variability in age, growth and life history of American shad (Alosa sapidissima) throughout the upper Delaware River. Both live and dead American shad were collected during spring 2020 and 2021. Sex, length, age, and repeat spawning information were recorded for each individual (n = 512), in addition to whether they were collected alive or dead. Several von Bertalanffy growth curves (VBGF) were created to both test hypotheses about variables affecting the growth rates of American shad, as well as to produce accurate growth estimates for this relatively unsampled portion of the spawning population in the Delaware River. Spawning American shad collected from the upper Delaware River were 6 years old on average. About half (48%) of the fish collected possessed repeat spawning marks. Average fork length decreased and average age increased with distance sampled upstream. A sex-based model was determined to be the best predictor of growth and was combined with the river mile of capture and young-of-year length data to estimate population parameters. The results of this study expanded knowledge about several life history characteristics of spawning American shad in the upper reaches of the Delaware River and can be used by fisheries managers during stock assessment to better predict growth rates and the mortality of American shad spawning in this geographic location.