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2023

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Articles 1231 - 1260 of 1264

Full-Text Articles in Animal Sciences

Rumen-Protected Methionine Supplementation Improves Lactation, Oxidative Status, And Immune Response During A Subclinical Mastitis Challenge In Lactating Dairy Cows., Anita Paz Lopez Jan 2023

Rumen-Protected Methionine Supplementation Improves Lactation, Oxidative Status, And Immune Response During A Subclinical Mastitis Challenge In Lactating Dairy Cows., Anita Paz Lopez

Electronic Theses and Dissertations

Mastitis is a significant problem in the dairy industry, posing numerous challenges for dairy farmers worldwide. Mastitis refers to the inflammation of the mammary gland, primarily caused by bacterial infections. This condition affects the health and well-being of dairy cows and has severe economic implications for farmers and overall dairy production. The prevalence of mastitis substantially threatens milk quality, productivity, and profitability, making it a top concern in the dairy industry. Preventing mastitis in cows is crucial for maintaining the herd's health and ensuring highquality milk production. Nutritional strategies have recently gained greater attention due to a direct impact on …

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Identification Of Genes Expressed In The Anterior Pituitary Associated With Water Restriction In Beef Cattle, Himali Chathurika Wickramasinghe Vithana Arachchilage Jan 2023

Identification Of Genes Expressed In The Anterior Pituitary Associated With Water Restriction In Beef Cattle, Himali Chathurika Wickramasinghe Vithana Arachchilage

Electronic Theses and Dissertations

Water is an essential nutrient and is required for growth, metabolism, lactation, and reproduction. Without water, livestock production would not be possible. Despite its importance, water requirements in livestock have not received much attention from the research community since the 1950s. The most recent edition of the Nutrient Requirements of Beef Cattle (8th edition) relies on literature from the 1950s or earlier for defining water requirements in beef cattle. Since the time these requirements were estimated, much has changed with regards to body size, genetics, and productivity of our livestock herds, including beef cattle. Global surface temperatures have increased in …

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Characterizing Vaginal Gene Expression In Prepubertal Gilts, Shannon Lee Dierking Jan 2023

Characterizing Vaginal Gene Expression In Prepubertal Gilts, Shannon Lee Dierking

Electronic Theses and Dissertations

The best-known predictor of reproductive success in gilts is the age at puberty. Early puberty (i.e., d170 – d180 of age) is associated with improved long-term reproductive performance and more full value offspring for market. The ability to predict, in the prepubertal stage, the age that a replacement gilt would be expected to achieve puberty has great reproductive and economic advantages. This work focuses on identifying biological markers that are potentially predictive of age at puberty. Study 1 identified changes in the vaginal epithelium during gilt reproductive development. Pre-pubertal gilts (n =13) were followed from d70 of age until first …

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Regional Assessment Of Live Cattle And Carcass Characteristics In The Northern Plains, Harlee A. Brauckmuller Jan 2023

Regional Assessment Of Live Cattle And Carcass Characteristics In The Northern Plains, Harlee A. Brauckmuller

Electronic Theses and Dissertations

The goal of this project was to perform a regional assessment of live cattle and carcass characteristics in the northern plains. The assessment audited three packing plants to assess fed cattle, cow, and bull production. The live animal factors evaluated were transportation, mobility of cattle, identification, brands, and mud/manure present. Data collected during the slaughter process was bruising, dentition, and offal condemnations. In fed cattle yield grade, quality grade, and hot carcass weight were assessed. In cows and bulls muscle score and fat color score were assessed. To assess differences between cattle in the Northern Plains and cattle in the …

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The Live Bait Trade As A Pathway Of Inland Invasive Fish Species Introductions, Hannah Mulligan Jan 2023

The Live Bait Trade As A Pathway Of Inland Invasive Fish Species Introductions, Hannah Mulligan

Electronic Theses and Dissertations

Freshwater systems are susceptible to numerous anthropogenic pathways of invasive species introductions and subsequent establishment. Once establishment occurs, invasive species not only impact biodiversity, ecosystem function, and human health, but also cost the global economy billions of dollars every year. Recreational fishing is one of the most prevalent pathways for invasive species introductions in freshwater systems due to increased propagule pressure from boating and angling activity. Within recreational fishing, the live bait trade represents a secondary pathway whereby anglers illegally release baitfish (and water) that may contain invasive species. Preventative actions, including regulations, education, and inspections have been implemented to …

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Analysis For Prioritizing Risk Status And Sustainable Utilization Of Cattle, Sheep, And Goat Breeds In Türkiye, Mesut Yildirir, Seyrani̇ Koncagül, Yasemi̇n Öner, Ayşe Oya Akin Jan 2023

Analysis For Prioritizing Risk Status And Sustainable Utilization Of Cattle, Sheep, And Goat Breeds In Türkiye, Mesut Yildirir, Seyrani̇ Koncagül, Yasemi̇n Öner, Ayşe Oya Akin

Turkish Journal of Veterinary & Animal Sciences

Animal Genetic Resources (AnGR) are a warranty for future unknown conditions and needs. Due to this fact, sustainable use and conservation of AnGR have special importance, and to achieve reliable programs for these goals, the risk status of AnGR should be estimated accurately. The aim of this study was to estimate the risk status for three widely used domesticated livestock species of cattle, sheep, and goat in animal production: 6 cattle, 33 sheep, and 15 goat breeds were included in the analysis. Extinction probability (z) was taken as a criterion for the risk status of each breed. Data collection based …

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Effect Of Lipid-Enriched Diet Associated With Bovine Recombinant Somatotropin On Superovulation Response And Embryo Recovery In Heifers, Richelle Matos Oliveira, Anselmo Domingos Ferreira Santos, Francisco Palma Rennó, Camilla Mendonça Silva Jan 2023

Effect Of Lipid-Enriched Diet Associated With Bovine Recombinant Somatotropin On Superovulation Response And Embryo Recovery In Heifers, Richelle Matos Oliveira, Anselmo Domingos Ferreira Santos, Francisco Palma Rennó, Camilla Mendonça Silva

Turkish Journal of Veterinary & Animal Sciences

The current study aimed to evaluate the effects of soybean oil supplementation associated with the administration of bovine recombinant somatotropin (rBST) on the population of ovarian follicles, standardization of both the superovulation response and embryo recovery in heifers. We used 40 Holstein heifers submitted to a 2 × 2 factorial, forming the experimental groups: DC-SL (control diet plus saline solution application); OL-SL (diet with soybean oil plus saline application); DC-rBST (control diet plus application of 320 mg rBST) and OL-rBST (diet with soybean oil plus the application of 320 mg rBST). The animals received two applications of 500 mg of …

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Phenotypic And Genotypic Characterization Of Antimicrobial Resistance In Commonly Isolated Salmonella Serovars From Chickens, Seyyi̇de Sariçam İnce, Mehmet Akan Jan 2023

Phenotypic And Genotypic Characterization Of Antimicrobial Resistance In Commonly Isolated Salmonella Serovars From Chickens, Seyyi̇de Sariçam İnce, Mehmet Akan

Turkish Journal of Veterinary & Animal Sciences

Salmonellosis caused by Salmonella agents is the second most common zoonotic infection in humans. In recent years, Salmonella's increasing antimicrobial resistance (AMR) has been a concern. The major transmission route of Salmonella is consumption of contaminated poultry products. Therefore, monitoring of antimicrobial resistance in chicken-originated Salmonella is critically important. This study investigated AMR in four commonly isolated Salmonella serovars from chickens, namely Salmonella Enteritidis (S. Enteritidis), Salmonella Infantis (S. Infantis), Salmonella Kentucky (S. Kentucky), and Salmonella Typhimurium (S. Typhimurium). A total of 133 isolates were examined by phenotypic and genotypic AMR characterization. Resistance to 14 different antimicrobials and eight …

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Are The Mandible Shapes Of Common (Paradoxurus Hermaphroditus) And Golden (Paradoxurus Zeylonensis) Palm Civets Different? A Pilot Study, İftar Gürbüz, Yasi̇n Demi̇raslan, Channa Rajapaksha, Devaka K. Weerakoon, Saminda Fernando Jan 2023

Are The Mandible Shapes Of Common (Paradoxurus Hermaphroditus) And Golden (Paradoxurus Zeylonensis) Palm Civets Different? A Pilot Study, İftar Gürbüz, Yasi̇n Demi̇raslan, Channa Rajapaksha, Devaka K. Weerakoon, Saminda Fernando

Turkish Journal of Veterinary & Animal Sciences

In this study adult common and golden palm civet mandibles were analysed by geometric morphometric method. For this purpose, the materials were photographed in accordance with the procedure and analysed using computer programs. No allometric component was detected in the comparison of the mandibles. The first principal component defined 28.657% of the total shape variation in the mandibles of the two groups that were analysed with a total of 19 landmarks. The samples were largely separated from each other in the principal component analysis. The shape differences were mostly in the caudal of the mandible. Also, in the common palm …

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Occurrence Of Staphylococcus Aureus In Milk And Antibacterial Properties Of Some Herbal Extracts On Milk And Hospital-Acquired Strains, Reza Ebrahimi Hariry, Gülçi̇n Akca, Ayhan Fi̇lazi̇ Jan 2023

Occurrence Of Staphylococcus Aureus In Milk And Antibacterial Properties Of Some Herbal Extracts On Milk And Hospital-Acquired Strains, Reza Ebrahimi Hariry, Gülçi̇n Akca, Ayhan Fi̇lazi̇

Turkish Journal of Veterinary & Animal Sciences

Staphylococcus aureus is a remarkable infectious agent, and with the development of antibiotic resistance by S. aureus, finding new, effective, and safe alternative therapeutic options in animals and humans is crucially demanded. In this study, the occurrence of S. aureus was explored by collecting nonmastitis bovine milk samples first, and then the effects of herbal extracts on methicillinresistant S. aureus (MRSA) strains isolated from cow's milk and humans in the hospitals were investigated. The occurrences of S. aureus in bovine raw milk samples were 13.4%. All raw milk S. aureus isolates were fully susceptible to cefoxitin, ceftiofur, penicillin G, …

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Efficacy Of Acacia Nilotica Bark Extract As An Alternative To Antibiotics In Broilers Challenged With Escherishia Coli From 15 To 28 Days, Muhammad Umer Zahid, Anjum Khalique, Shafqat Nawaz Qaisrani, Muhammad Ashraf, Ali Ahmad Sheikh, Muhammad Umar Yaqoob Jan 2023

Efficacy Of Acacia Nilotica Bark Extract As An Alternative To Antibiotics In Broilers Challenged With Escherishia Coli From 15 To 28 Days, Muhammad Umer Zahid, Anjum Khalique, Shafqat Nawaz Qaisrani, Muhammad Ashraf, Ali Ahmad Sheikh, Muhammad Umar Yaqoob

Turkish Journal of Veterinary & Animal Sciences

The present experiment was conducted to compare the effect of Acacia nilotica bark extract and antibiotic on different biological parameters in broilers challenged with E. coli. Five hundred 2-week-old broiler chicks were divided into five treatments (Cont, NC, PC, AN-BE3, and AN-BE5) with ten replicates per treatment (10 chicks per replicate), and the experiment was extended over 2 weeks. All chicks, except that of Cont were challenged with E. coli (10$^{7}$ CFU/bird). Cont: basal diet only; NC: challenged with E. coli; PC: NC + Zinc Bacitracin 50 mg/kg diet; AN-BE3: NC + A. nilotica bark extract supplementation 0.3%; …

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Effects Of Use Of Conventional And Sexed Semen On Conception Rate, Calf Sex, Calf Birth Weight, And Stillbirth In Holstein Heifers, Tahi̇r Bayril Jan 2023

Effects Of Use Of Conventional And Sexed Semen On Conception Rate, Calf Sex, Calf Birth Weight, And Stillbirth In Holstein Heifers, Tahi̇r Bayril

Turkish Journal of Veterinary & Animal Sciences

Pregnancy rate is low in artificial insemination with sexed semen compared to conventional semen. This situation poses a major problem for dairy farms. The aim of this study was to determine the effects of semen type on conception rate, calf sex and birth weight, stillbirth, pregnancy loss, and postpartum maternal body weight (MBW) in Holstein heifers inseminated with sexed (n = 229), and conventional semen (n = 153). The female and male calf ratios of the heifers inseminated with sexed and conventional semen were found to be 88% to 54.8% and 12% to 45.2%, respectively. There was a significant difference …

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Effects Of Free Capric Acid, Lauric Acid, And Coconut Oil Supplementation On Performance, Carcass, And Some Blood Biochemical Parameters Of Broiler Chickens, Mehmet Demi̇rci̇, Şevket Evci̇, Mehmet Aki̇f Karsli, Ali̇ Şenol Jan 2023

Effects Of Free Capric Acid, Lauric Acid, And Coconut Oil Supplementation On Performance, Carcass, And Some Blood Biochemical Parameters Of Broiler Chickens, Mehmet Demi̇rci̇, Şevket Evci̇, Mehmet Aki̇f Karsli, Ali̇ Şenol

Turkish Journal of Veterinary & Animal Sciences

In this study, it was aimed to investigate the effects of the addition of free capric (decanoic, C10:0) and lauric (dodecanoic, C12:0) acids and coconut (Cocos nucifera) oil to the broiler diets on performance, carcass yield, internal organ weights and some blood parameters. A total of 144 day-old broiler chicks (Ross 308) were used in the study, and four main groups were formed with four subgroups containing equal number of chicks. The control (C) group was fed with basal diet without any supplementation and the experimental groups were fed with 0.4% free capric acid (CA)-, lauric acid (LA)-, …

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Arterial Vascularization Of The Spleen In Merino Sheep, Melek Tosun, Şükrü Hakan Atalgin Jan 2023

Arterial Vascularization Of The Spleen In Merino Sheep, Melek Tosun, Şükrü Hakan Atalgin

Turkish Journal of Veterinary & Animal Sciences

In this study, it is aimed to reach detailed information about the anatomy of arteries in the sheep spleen, which can be used as an example and model for the success of planned or emergency surgical interventions related to the spleen. In spleen injuries, the spleen may be divided into two or three parts, or it may be limited to cracks on the spleen. In particular, it is aimed to protect the organs that have been damaged by trauma recently. Operations such as splenectomy and splenography are surgical procedures that require good knowledge of the pathways of artery and its …

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Effects Of Feeding In Different Quality Rangelands On Meat Quality And Fatty Acids Composition In Angora Goat Kids And Young Bucks, Betül Zehra Sariçi̇çek Jan 2023

Effects Of Feeding In Different Quality Rangelands On Meat Quality And Fatty Acids Composition In Angora Goat Kids And Young Bucks, Betül Zehra Sariçi̇çek

Turkish Journal of Veterinary & Animal Sciences

The effects of feeding in different quality rangelands on meat quality and fatty acids composition in Angora goat kids and bucks were determined. Twenty male Angora goat kids were selected from each farm that produces Angora goats in the area. There are three separate rangelands with previously determined quality classes (good, medium, and low-quality). In each farm, among these animals grazed completely on the rangeland, 7 heads from 4-month-old kids and 7 heads from 7-month-old bucks were selected and slaughtered. The Longissimus thoracis muscle was removed for meat quality measurement. The increased rangeland quality increased the protein content of kid's …

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Examination Of Canine Herpesvirus-1 In Dogs By Serological, Molecular, And Pathological Methods, Serkan Yildirim, Fatma Gülten Bayraktar, Hakan Aydin, Yavuz Seli̇m Sağlam, Gi̇zem Eser, Muhammet Bahaeddi̇n Dörtbudak Jan 2023

Examination Of Canine Herpesvirus-1 In Dogs By Serological, Molecular, And Pathological Methods, Serkan Yildirim, Fatma Gülten Bayraktar, Hakan Aydin, Yavuz Seli̇m Sağlam, Gi̇zem Eser, Muhammet Bahaeddi̇n Dörtbudak

Turkish Journal of Veterinary & Animal Sciences

In this study, it was aimed to examine Canine Herpesvirus-1 (CHV-1) with different diagnostic methods and investigate the pathological changes in positive samples. For this purpose, 100 dog uteruses of different ages and breeds, were removed by ovariohysterectomy and their blood samples were used as the study material. Enzyme-linked immunosorbent assay (ELISA) and Indirect Fluorescent Antibody Test (IFAT) for serological diagnosis, polymerase chain reaction (PCR) method for molecular diagnosis, immunohistochemistry (IHC) and immunofluorescence (IF) staining for immunopathological diagnosis were performed on the samples. Additionally, hematoxylin and eosin (HE) staining was performed to examine the histopathological changes in the CHV- 1-positive …

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Genetic Parameters Of Growth, Reproductive, And Productive Characteristics In Anatolian Buffaloes, Yusuf Kaplan, Mustafa Tekerli̇ Jan 2023

Genetic Parameters Of Growth, Reproductive, And Productive Characteristics In Anatolian Buffaloes, Yusuf Kaplan, Mustafa Tekerli̇

Turkish Journal of Veterinary & Animal Sciences

It was aimed to investigate the genetic parameters in growth, fertility, and productivity of Anatolian buffaloes maintained at private farms of Yozgat. A total of 1139 buffalo cows and their calves were used in the study. The weights at birth, weaning, 6th and 12th months of age, and daily live weight gains (DLWG) of buffalo calves born from 2015 to 2019 were recorded. Calving interval (CI) and service period (SP), lactation milk yield (LMY), milk yield per day of lactation period (MYPDLP), milk yield per day of calving interval (MYPDCI), peak yield (PY), a day at peak yield (DPY) and …

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Modeling Of Individual Egg Weights Of Lohmann-Brown Layer Hens, Esra Yavuz, Samet Hasan Abaci, Kadi̇r Erensoy, Mustafa Şahi̇n Jan 2023

Modeling Of Individual Egg Weights Of Lohmann-Brown Layer Hens, Esra Yavuz, Samet Hasan Abaci, Kadi̇r Erensoy, Mustafa Şahi̇n

Turkish Journal of Veterinary & Animal Sciences

This study was carried out to determine the most suitable model for egg weights of the Cubic, Gompertz, Logistics, Gamma, Richard, Piecewise Quadratic, Orscov, and Sigmoaidal models, which are widely used in estimation. Lohmann-Brown Classic laying hens raised in Ondokuz Mayıs University Research and Application farm were used as animal material. In the modeling of egg weights of 351 layer hens raised in 3-storey cages, individual egg weight data measured at weekly intervals, 32 on the 1st floor, 17 on the 2nd floor, and 27 on the 3rd floor, were taken into account, and a total of 76 hens' individual …

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The Effect Of Saccharomyces Cerevisiae As A Probiotic On The Nutrient Degradability Of Some Commonly Feedstuffs Used In Turkey, Muslimo Abdullahi Sheikh Hassan, Mehmet Aki̇f Karsli Jan 2023

The Effect Of Saccharomyces Cerevisiae As A Probiotic On The Nutrient Degradability Of Some Commonly Feedstuffs Used In Turkey, Muslimo Abdullahi Sheikh Hassan, Mehmet Aki̇f Karsli

Turkish Journal of Veterinary & Animal Sciences

The objective of this study was to evaluate the effects of Saccharomyces cerevisiae as a probiotic on in situ ruminal DM, OM, CP and starch degradability values in some energy and protein sources commonly used in ruminant nutrition. In this study, the in situ degradation kinetics and fractions of dry matter, organic matter, crude protein, and starch of 6 different feedstuffs (barley, wheat, corn, sunflower seed meal, cottonseed meal and soybean meal) commonly used in animal nutrition were determined. Three ruminally cannulated Bafra sheep were used in the experiment. The experiment was designed as carryover experimental design with two periods. …

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Investigation Of The In Vitro Antioxidant Activity Of Fermented Tomato Pruning Residues And Its Effects On Biochemical And Hematological Parameters Of Rats, Bariş Denk, Beyza Aydoğan, İsmai̇l Bayram, Abdurrahman Fati̇h Fi̇dan Jan 2023

Investigation Of The In Vitro Antioxidant Activity Of Fermented Tomato Pruning Residues And Its Effects On Biochemical And Hematological Parameters Of Rats, Bariş Denk, Beyza Aydoğan, İsmai̇l Bayram, Abdurrahman Fati̇h Fi̇dan

Turkish Journal of Veterinary & Animal Sciences

In the tomato greenhouse production process, a by-product emerges in the form of greenhouse residues. One of these residues is leaf pruning residue, which poses an environmental pollution problem in terms of waste management. The purpose of this work was to investigate the use of fermented tomato leaves (FTL) as an animal feed additive and its potential to mitigate the environmental pollution problem caused by greenhouse pruning residues. The pruning residues were fermented and their in vitro antioxidant activity (AOA) levels were analyzed using 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS), 2,2-diphenyl-1-picryl-hydrazylhydrate (DPPH), reducing power (RP), and total phenolic content (TPC) assays. Wistar albino …

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Investigation Of Snps In Bmp15 And Gdf9 Genes In "Çepni" And "Of" Sheep In The Black Sea Region Of Turkey, Koray Kirikçi Jan 2023

Investigation Of Snps In Bmp15 And Gdf9 Genes In "Çepni" And "Of" Sheep In The Black Sea Region Of Turkey, Koray Kirikçi

Turkish Journal of Veterinary & Animal Sciences

Sheep fertility genes have been studied in Turkey for many years. But so far it cannot be said that a satisfactory result has been achieved in terms of the number of detected polymorphisms on fertility genes. Exhibiting the genetic structure of local gene resources adapted to a particular region is very important for sustainability, conservation and breeding studies, and many other issues such as profitability. Therefore, the primary aim of this study was to investigate the single nucleotide polymorphisms (SNPs) on the BMP15 and GDF9 genes in two new Turkish sheep breeds, Çepni and Of. DNA sequencing was performed to …

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The First Record Of Philophthalmus Lucipetus (Trematoda: Philophthalmidae) In The Great Egret (Ardea Alba) From Turkey, Mehmet Öztürk, Şi̇nasi̇ Umur Jan 2023

The First Record Of Philophthalmus Lucipetus (Trematoda: Philophthalmidae) In The Great Egret (Ardea Alba) From Turkey, Mehmet Öztürk, Şi̇nasi̇ Umur

Turkish Journal of Veterinary & Animal Sciences

The genus Philophthalmus, Looss 1899 (Echinostoma: Philophthalmidae) is a cosmopolitan group of parasites that infects the eyes of birds and mammals, including humans. A great egret (Ardea alba) was found dead in Kızılırmak Delta, Samsun, Turkey. The bird was transported to the Faculty of Veterinary Medicine, Ondokuz Mayıs University, Samsun Turkey, for a necropsy. In the parasitological examination, a trematode was detected in the eye, and then it was identified as Philophthalmus lucipetus. This is the first report of the zoonotic parasite P. lucipetus in Turkey.

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Federal Funding Statutes And State-Federal Wildlife Authority: Did Congress Demonstrate A Preference For State Wildlife Management Authority With Pittman-Robertson And Dingell-Johnson?, James Vaughan Branch Jan 2023

Federal Funding Statutes And State-Federal Wildlife Authority: Did Congress Demonstrate A Preference For State Wildlife Management Authority With Pittman-Robertson And Dingell-Johnson?, James Vaughan Branch

Graduate Student Theses, Dissertations, & Professional Papers

The Federal Aid in Wildlife Restoration Act of 1937 now known as Pittman-Robertson and Federal Aid in Sport Fish Restoration Act of 1950 now known as Dingell-Johnson are federal statutes which stand as the original and perhaps most significant federal funding statutes supporting state wildlife conservation and management. Congress’s decision to pass these statutes may be argued to be a prima facie endorsement of state wildlife agencies (SWA) as the primary managers of wildlife since each statute dedicated substantial federal excise revenue to SWAs. We hypothesized we would find consistent evidence in favor of primary state management authority over wildlife. …

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Survival And Growth Of Juvenile Coho Salmon (Oncorhynchus Kisutch) In Restored Wetlands Of Humboldt Bay, California, Josh D. Cahill Jan 2023

Survival And Growth Of Juvenile Coho Salmon (Oncorhynchus Kisutch) In Restored Wetlands Of Humboldt Bay, California, Josh D. Cahill

Cal Poly Humboldt theses and projects

Substantial investment in habitat restoration efforts have been made to promote coho salmon (Oncorhynchus kisutch) recovery, yet sampling efforts to document the response of coho salmon populations to wetland restoration are limited. I investigated two cohorts of juvenile coho salmon growth, movement, and survival within the Humboldt Bay drainage in California. My study sites included restoration features and other sample areas in upland creek habitat and in lowland estuarine wetlands that were located in the four largest watersheds within the Humboldt Bay drainage. The objectives of this study were to: (1) determine if coho salmon are using restored, …

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A Return To The Staging Grounds: Reassessment Of Aleutian Cackling Goose Spring Distribution In North Humboldt Bay, Shaun W. Thornton Jan 2023

A Return To The Staging Grounds: Reassessment Of Aleutian Cackling Goose Spring Distribution In North Humboldt Bay, Shaun W. Thornton

Cal Poly Humboldt theses and projects

After a 15-year interval in research, spatial and temporal patterns of the Aleutian cackling goose during spring staging was assessed again in 2022. During my study, 3,389 goose flocks were recorded in Arcata Bottoms staging site, 1 January to 21 April 2022, amounting to an estimated total of 2,248,512 goosedays, which was 336.8% higher than 2007 estimates of 667,485 goosedays. Geese continued to use pastures with a wide range of landscape characteristics primarily represented by livestock grazing practices. Goose use was greater than availability on beef-cattle fields early in the season and dairy-cow fields later in the season. Human disturbances …

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Genetic Evaluation Of The Current Distribution And Possible Diffrentations Between Lasiurus Borealis And Lasiurus Frantzii In Southwestern North America, Zeinab M. Haidar Jan 2023

Genetic Evaluation Of The Current Distribution And Possible Diffrentations Between Lasiurus Borealis And Lasiurus Frantzii In Southwestern North America, Zeinab M. Haidar

Cal Poly Humboldt theses and projects

Several recent accounts of overlap and historic misidentifications regarding two species of the genus Lasiurus, Western red bat (Lasiurus frantzii) and Eastern red bat (Lasiurus borealis), have cast doubt on our understanding of their distribution, assumed spatial allopatry, and interactions in the United States Southwest. With the use of morphometrics and genetic sequencing, utilizing tissue collected from specimens throughout California and adjoining states, we have reassessed the current distribution, best practices for field identification, and genetic differentiation between both species. Appropriate species classification by region was achieved utilizing mitochondrial DNA, targeting the cytochrome c oxidase …

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Long-Line Culture Of Red Seaweed In The Pacific Northwest, Erika R. Thalman Jan 2023

Long-Line Culture Of Red Seaweed In The Pacific Northwest, Erika R. Thalman

Cal Poly Humboldt theses and projects

The goal of this study was to adapt open-water rope culture techniques to the native red seaweed Devaleraea mollis to support a new seaweed aquaculture industry in Humboldt Bay, California. The specific objectives for this study were to: 1) evaluate the growth of D. mollis cultivated at different depths and seasons (fall/winter, spring/summer), 2) estimate nutrients removed by D. mollis from the water, and 3) measure heavy metals and pesticides to determine potential health risk upon ingestion. Bundles of seaweed were inserted into 3 m long weighted vertical lines attached to two horizontal long-lines suspended by floats. Two four-month …

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Olfactory Organ Morphology And Ultrastructure Of The Larval Koh Tao Island Caecilian (Ichthyophis Kohtaoensis), Jaclyn M. Patmore Jan 2023

Olfactory Organ Morphology And Ultrastructure Of The Larval Koh Tao Island Caecilian (Ichthyophis Kohtaoensis), Jaclyn M. Patmore

Cal Poly Humboldt theses and projects

The olfactory system of living amphibians (Lissamphibia) undergoes major changes as it transitions from an aquatic to a terrestrial system during metamorphosis. Patterns of change in the cellular morphology of the nose have been examined for frogs (Anura) and salamanders (Caudata). However, it remains unknown if caecilians (Gymnophiona) have similar patterns of change in their nasal ultrastructure. In particular, no data on larval caecilian olfactory cell types are available. Here, using light microscopy and transmission electron microscopy, I examined the olfactory organ of larvae of the caecilian Ichthyophis kohtaoensis, to establish the ultrastructure of the epithelium and compare it …

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A Review Of Methods For Detecting Rats At Low Densities, With Implications For Surveillance, Robert A. Davis, Philip J. Seddon, Michael D. Craig, James C. Russell Jan 2023

A Review Of Methods For Detecting Rats At Low Densities, With Implications For Surveillance, Robert A. Davis, Philip J. Seddon, Michael D. Craig, James C. Russell

Research outputs 2022 to 2026

Invasive rats are the biggest threat to island biodiversity world-wide. Though the ecological impacts of rats on insular biota are well documented, introduced rats present a difficult problem for detection and management. In recent decades, improved approaches have allowed for island-wide eradications of invasive rats on small-medium sized islands and suppression on large islands, although both these still represent a formidable logistical and financial challenge. A key aspect of eradication or suppression and ongoing management is the ability to detect the presence of rats, especially at low densities. Here we review recent developments in the field of rat surveillance and …

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Corrigendum: Evolution, Ecology, And Zoonotic Transmission Of Betacoronaviruses: A Review, Herbert F. Jelinek, Mira Mousa, Eman Alefishat, Wael Osman, Ian Spence, Dengpan Bu, Samuel F. Feng, Jason Byrd, Paola A. Magni, Shafi Sahibzada, Guan K. Tay, Habiba S. Alsafar Jan 2023

Corrigendum: Evolution, Ecology, And Zoonotic Transmission Of Betacoronaviruses: A Review, Herbert F. Jelinek, Mira Mousa, Eman Alefishat, Wael Osman, Ian Spence, Dengpan Bu, Samuel F. Feng, Jason Byrd, Paola A. Magni, Shafi Sahibzada, Guan K. Tay, Habiba S. Alsafar

Research outputs 2022 to 2026

In the published article, there was an error in the legend for Figure 1 as published. The figure legend did not indicate that it has been adapted from Plowright et al. (2017). Copyright permission was obtained from Springer Nature to adapt Figure 1 from Plowright et al. (2017). The corrected legend appears below. Figure 1. Zoonotic risk distribution, pathway to spillover, and the multimodal role of the determinants of spillover. The zoonotic risk is demonstrated by the accumulated distribution of reservoir hosts and vectors that play a role in the pathway to spillover. The risk of spillover is determined by …

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