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Analyzing The Catfish And Trout Competitiveness Trends And Potential Trade Within The Us And Global Aquaculture Industry: A Gravity Model Approach, Diana Marisol Amaya Discua

LSU Master's Theses

The United States is one of the major seafood product importers in the world. Despite the increases in global seafood and aquaculture consumption over the past decades, there is limited information on the trade dynamics of this sector. To address this gap, this study uses an augmented gravity model to evaluate the factors that have influenced catfish and trout imports into the United States. The analysis was conducted using the Poisson Pseudo Maximum Likelihood (PPML) estimator to address issues of heteroskedasticity, autocorrelation, and zero trade flows. The results highlight the importance of Gross Domestic Product (GDP) and exchange rates in …

Changes In Morphology, Phenology, Demography Of Several Avian Species Over 18 Years At A Restored Grassland, Ashley Mcmahon, Katie Stumpf, Charlie Muise

Biology Theses

In response to a changing climate and habitat loss, avian species are displaying changes in body size, migration phenology, and demography. Species have often adhered to Allen’s and Bergmann’s rules, displaying increased wing length and decreased body mass, respectively, over time in response to higher temperatures. Additionally, climate change has resulted in earlier spring migration and depending on species, either earlier or later fall migration. Finally, species affected by habitat loss often display male-skewed sex ratios and juvenile skewed age ratios. Our goal was to determine how 1) body size, 2) migration phenology, and 3) demography have changed for grassland …

Scorpiops Tangae Sp. N. (Scorpiones: Scorpiopidae) From Laos, František Kovařík, František Šťáhlavský, Mark Stockmann

Euscorpius

A new species Scorpiops tangae sp. n. is described from Laos, fully illustrated with color photos showing its morphology and habitus. Scorpiops tangae sp. n. is the only species of the genus with a combination of five characters: chelal trichobothrium Eb₃ located in distal half of manus between trichobothria Dt and Est; patella of pedipalp with 11 ventral and 17 external trichobothria; fingers of pedipalps undulate in male; pedipalp movable finger with ca. 45 IAD; and chela length to width ratio 3.7 in male. In addition to morphology and hemispermatophore, we also present the …

Differential Hepatic Expression Of Mirna In Response To Aflatoxin B1 Challenge In Domestic And Wild Turkeys, Kade Jorud, Kristelle M. Mendoza, Thomas Kono, Roger A. Coulombe, Kent M. Reed

Animal, Dairy, and Veterinary Science Faculty Publications

Aflatoxin B1 (AFB₁) is a major foodborne mycotoxin that poses a significant economic risk to poultry due to a greater degree of susceptibility compared to other agricultural species. Domesticated turkeys (Meleagris gallopavo) are especially sensitive to AFB₁; however, wild turkeys (M. g. silvestris) are more resistant. A lack of functional isoforms of hepatic glutathione S-transferases (GSTs), an enzyme that plays a role in the detoxification of aflatoxin, is suspected as the reason for the increased sensitivity. Previous studies comparing the gene expression of domesticated and wild turkeys exposed to AFB₁ identified …

Differences In Susceptibility To Sars-Cov-2 Infection Among Transgenic Hace2-Hamster Founder Lines, Scott A. Gibson, Yanan Liu, Rong Li, Brett L. Hurst, Zhiqiang Fan, Venkatraman Siddharthan, Deanna P. Larson, Ashley Y. Sheesley, Rebekah Stewart, Madelyn Kunzler, Irina A. Polejaeva, Arnaud J. Van Wettere, Stefan Moisyadi, John D. Morrey, E. Bart Tarbet, Zhongde Wang

Animal, Dairy, and Veterinary Science Faculty Publications

Animal models that are susceptible to SARS-CoV-2 infection and develop clinical signs like human COVID-19 are desired to understand viral pathogenesis and develop effective medical countermeasures. The golden Syrian hamster is important for the study of SARS-CoV-2 since hamsters are naturally susceptible to SARS-CoV-2. However, infected hamsters show only limited clinical disease and resolve infection quickly. In this study, we describe development of human angiotensin-converting enzyme 2 (hACE2) transgenic hamsters as a model for COVID-19. During development of the model for SARS-CoV-2, we observed that different hACE2 transgenic hamster founder lines varied in their susceptibility to SARS-CoV-2 lethal infection. The …

Oregon State Rank Assessment For Warner Basin Tui Chub (Siphateles Bicolor Ssp. 15), Eleanor P. Gaines, Jesse Laney

Institute for Natural Resources Publications

Oregon state conservation status assessment for Warner Basin tui chub (Siphateles bicolor ssp. 15) using NatureServe methodology, 2024.

A Long-Recognized But Undescribed New Species Of Cyprinella (Cypriniformes: Leuciscidae) From North Carolina And South Carolina, United States, Bryn H. Tracy, Fred C. Rohde, Michael A. Perkins, Laura M. Lee, Kara B. Carlson, Madelyn Mccutcheon, Brena K. Jones, Heather K. Evans

Southeastern Fishes Council Proceedings

Cyprinella leptocheilus sp. nov., Siouan Thinlip Chub, is described as a new species that is endemic to Sand Hills and upper Coastal Plain streams in North Carolina and South Carolina. Recognized as an undescribed species since the early 1970s, this fish was known in the literature and in museum electronic databases as Hybopsis n. sp., H. sp. cf. zanema, Cyprinella n. sp., and C. sp. cf. zanema. Unofficially, it had gone by the common name Thinlip Chub. It was thought to be closely related to the two other barbeled Cyprinella species: Thicklip Chub, …

Shell Translucency: A Novel Eggshell Quality Parameter In Broiler Breeders, Duarte Neves, Austin Jasek, Colwayne Morris, Raquel Burin, Kevin Stephens, Marco Rebollo

Proceedings of the Arkansas Nutrition Conference

In the United States, nearly 240 million commercial broiler breeder eggs are incubated weekly with an average hatchability of 79.1% (Third Party Reporting). Between 160 eggs/hen and 125 chicks/hen the loss is considerable. In 2007, an estimated 1% improvement in hatchability would escalate profits by over $25 million to hatcheries and markedly increase profitability in broiler operations (Schaal and Gherian, 2007). In order to tap into top hatchability performances, egg management in commercial hatcheries such as egg storage time and conditions, incubation temperature and humidity, as well as turning frequency are of utmost importance (Vick et al., 1993; Reis et …

Oregon State Rank Assessment For Catlow Tui Chub (Siphateles Bicolor Ssp. 2), Jesse Laney

Institute for Natural Resources Publications

Oregon state conservation status assessment for Catlow tui chub (Siphateles bicolor ssp. 2) using NatureServe methodology, 2024.

Oregon State Rank Assessment For Sheldon Tui Chub (Siphateles Bicolor Eurysoma), Eleanor P. Gaines

Institute for Natural Resources Publications

Oregon state conservation status assessment for Sheldon tui chub (Siphateles bicolor eurysoma) using NatureServe methodology, 2024.

Effects Of Supplementing Rumen-Protected Methionine And Lysine On Milk Yield And Milk Composition In Dairy Cows, Imene Kerbache, Samir Souames, Amel Haddoum, Nedjoua Lakhdara, Nassim Moula

Turkish Journal of Veterinary & Animal Sciences

The use of “health-food additives” has gained significant attention within the dairy sector, with a focus on enhancing the nutritional intake of dairy cows to improve their productivity and reproductive performance. This study aims at examining the impact of rumen-protected methionine (Met) and lysine (Lys) supplementation on production and reproductive parameters in a sample of 100 dairy cows, comprising 32 primiparous and 68 multiparous cows with an average of 5.24±2.31 years. The cows’ average milk production was determined to be 24.9±7.40 kg/day. The cows were divided into two groups, one receiving Met/Lys supplementation and the other serving as a control …

Monitoring Cow Behavior Based On Lying, Standing, Eating, And Ruminating Recognition Using Yolov8, Ali Saifudin, Sri Pantja Madyawati, Imam Yuadi, Rimayanti Rimayanti, Imam Mustofa, Riries Rulaningtyas, Teddy Surya Gunawan, Adnan Rahmat Anom Besari

Turkish Journal of Veterinary & Animal Sciences

Cow behavior is a crucial indicator for monitoring health, reproductive status, and welfare in livestock management. However, methods that rely on wearable devices often face significant challenges, including high costs, maintenance difficulties, and potential impacts on animal welfare. To address these limitations, this study explored the potential of using YOLOv8, a cutting-edge computer vision model, for non-invasive monitoring of cow behavior. The research methodology involved four key steps: data collection, preliminary data processing, model training, and validation. The findings revealed that YOLOv8 is capable of accurately detecting and localizing key cow behaviors—lying, standing, eating, and ruminating—achieving a mean average precision …

Investigation Of The Acaricidal Efficacy, Tolerance And Residue Levels Of Thymol-Containing Gelatin-Based Hydrogel Developed For Varroosis Control, Onur Demi̇r, Ali̇ Bi̇lgi̇li̇, Mehli̇ka Pulat

Turkish Journal of Veterinary & Animal Sciences

The aim of this study was to investigate the acaricidal efficacy, tolerability of the target species and residue levels of a thymol-containing gelatin-based hydrogel developed as a controlled release system for varroosis control. The study was carried out on naturally infested honey bee colonies and compared with those of the negative control and positive control groups. The acaricidal efficacy (%) of the negative control, positive control and hydrogel was 21.93 ± 2.87, 81.09 ± 2.30 and 70.32 ± 2.05, respectively. For the tolerability controls, the average number of dead bees per colony was determined to be 60.80 ± 8.01, 297.40 …

An Innovative Approach: Introducing Novel Sheep Paternity Testing Panels, Onur Yilmaz, İbrahi̇m Cemal, Nezi̇h Ata, Orhan Karaca

Turkish Journal of Veterinary & Animal Sciences

The aim of this research was to create various microsatellite paternity test panels that are efficient, cost-effective, simple, and accessible for paternity assessments within the Eşme sheep breed in Western Anatolia. The study included 2432 animals from sixteen farms, consisting of 147 rams and 2285 lambs. 17 microsatellite markers were utilized in the study to develop these test panels, prioritizing markers with high polymorphic information content (PIC) and probability of exclusion (PE) values. By combining markers with varying PIC and PE values, 16 distinct paternity test panels were established. The study revealed mean values for various parameters of the microsatellites …

Clustered Setation On The Pedipalps Of Buthid Scorpions (Scorpiones: Buthidae), Graeme Lowe, Victoria Tang

Euscorpius

Chaetotaxy of the external pedipalp femur and distal ventral pedipalp movable finger was studied in 120 species, 69 genera and 17 families of scorpions. Setation was generally denser in the ‘Buthus’ group, a major arid-adapted buthid lineage distributed across Palearctic deserts. On the external femur, macrosetae formed a prominent cluster, the ‘distal external macrosetal cluster’ (DEMC); on the distal ventral movable finger they formed a dense patch, the ‘distal ventral macrosetal cluster’ (DVMC). In other buthids and non-buthids, the DEMC and DVMC were mostly absent, except in a few arid-adapted genera. Relative setation densities of DEMC and DVMC in different …

Uroplectes Ebogo Sp. N. (Scorpiones: Buthidae) From Cameroon, František Kovařík, František Šťáhlavský, Valeriy Govorov

Euscorpius

A new species Uroplectes ebogo sp. n. is described from Cameroon, fully illustrated with color photos showing its morphology and habitus. Uroplectes ebogo sp. n. is the only species of the genus with a combination two characters: metasoma without carinae and metasoma V and telson without punctuation. In addition to morphology and hemispermatophore, we also present the information about the karyotype of Uroplectes ebogo sp. n. (2n=24).

Oregon State Rank Assessment For Nerite Ramshorn (Vorticifex Neritoides), Jesse Laney

Institute for Natural Resources Publications

Oregon state conservation status assessment for nerite ramshorn (Vorticifex neritoides) using NatureServe methodology, 2024.

Oregon State Rank Assessment For Yuma Myotis (Myotis Yumanensis), Jesse Laney

Institute for Natural Resources Publications

Oregon state conservation status assessment for Yuma myotis (Myotis yumanensis) using NatureServe methodology, 2024.

Oregon State Rank Assessment For Mann's Mollusk-Eating Ground Beetle (Scaphinotus Mannii), Jesse Laney

Institute for Natural Resources Publications

Oregon state conservation status assessment for Mann's mollusk-eating ground beetle (Scaphinotus mannii) using NatureServe methodology, 2024.

A Multivariate Approach To Assessing Landscape Structure Effects On Wildlife Crossing Structure Use, Thomas J. Yamashita, Humberto L. Perotto-Baldivieso, David B. Wester, Kevin W. Ryer, Richard J. Kline, Michael E. Tewes, John H. Young Jr., Jason V. Lombardi

School of Earth, Environmental, & Marine Sciences Faculty Publications

Background

Complexity in landscape structure is often assessed using individual metrics related to ecological processes. However, this rarely incorporates important relationships among metrics and may miss landscape structure effects. Multivariate statistics provide techniques for assessing overall landscape structure effects. We assessed how multivariate statistics could be used to connect landscape structure with an ecological process [bobcat (Lynx rufus) wildlife crossing structure (WCS) use]. We tested how landscape structure at WCS sites compared to the surrounding landscape and how structure affected detections at WCS sites. Our study was conducted in Cameron County, Texas, USA where WCSs are in various …

Temperature Affects Nest Box Selection, Nest Success, And Nestling Size In A Southeastern Population Of Eastern Bluebirds, Katie Stumpf

Georgia Journal of Science

Given the critical role of temperature in avian reproduction, rising global temperatures will likely impact reproductive success of many bird populations. We examined the effect of nest box temperature, nest box color, entrance orientation, distance to forest cover, and distance to water on net box selection, nest success, and nestling size in eastern bluebirds (Sialia sialis) in central Georgia. White painted nest boxes had significantly cooler temperatures than control nest boxes (P < 0.05). However, model selection revealed that eastern bluebird females selected control boxes, despite their overall warmer temperatures. Nest success was associated with year, likely because of high nest predation during the warmer 2022 breeding season (P < 0.05). Nest success was also associated with cooler nest boxes, possibly because incubating females spend more time incubating which can reduce predation risks. Larger nestlings fledged from painted nest boxes, nest boxes with cooler temperatures, and nests from 2021, which we attribute to decreased thermoregulatory demands enabling faster nestling growth in cooler boxes and years. These seemingly opposing results suggest there may be an optimal temperature range where nest box temperature maximizes reproductive fitness while minimizing energetic demands on incubating adults. Determining this temperature range can help target management efforts to ensure specific goals are met.

Albinism In Olivierus Martensii (Karsch, 1879) (Scorpiones: Buthidae), Victoria Tang, Zhenbang Liu

Euscorpius

This is a formal case report for the albinism in Olivierus martensii (Karsch, 1879). Albino phenotype is compared with its normal counterpart in terms of their morphology and behavior by cursory experiments. The examined 7 albino individuals (5 of which were adults) were smaller and more slender than their normal counterparts. However, these quantitative differences were not statistically significant and should be treated with caution due to the low sample size. Their abilities to detect both white light and UV light or UV-excited fluorescence were not significantly undermined, although their tendency to ensure a clear vision through self-cleaning behavior appeared …

Oregon State Rank Assessment For Obscure Bumblebee (Bombus Caliginosus), Jesse Laney, Eleanor P. Gaines

Institute for Natural Resources Publications

Oregon state conservation status assessment for obscure bumblebee (Bombus caliginosus) using NatureServe methodology, 2024.

Oregon State Rank Assessment For Goose Lake Tui Chub (Siphateles Bicolor Thalassinus), Jesse Laney

Institute for Natural Resources Publications

Oregon state conservation status assessment for Goose Lake tui chub (Siphateles bicolor thalassinus) using NatureServe methodology, 2024.

Oregon State Rank Assessment For Flightless Haliplid Beetle (Apteraliplus Parvulus), Eleanor P. Gaines

Institute for Natural Resources Publications

Oregon state conservation status assessment for flightless haliplid beetle (Apteraliplus parvulus) using NatureServe methodology, 2024.

Diversity Of Porifera Along The Coasts Of Türkiye, Alper Evcen, Bülent Topaloğlu

Turkish Journal of Zoology

This study compiled data on the distribution of sponge species on the coasts of Türkiye. The checklist consists of 183 speciesbelonging to 52 families, 16 orders, and 3 classes. The orders Haplosclerida (32 species), Poecilosclerida (28 species), Tetractinellida (26species), Dictyoceratida (21 species), and Suberitida (18 species) have the highest numbers of species found in the region. The Aegeancoast has the highest number of sponge species (155 species), followed by the Sea of Marmara (84 species), the Levantine coast (50species), and the Black Sea coast (24 species). Among the species, Niphates toxifera and Paraleucilla magna are alien species. A total of …

Diversity Of Cnidaria And Ctenophora From The Coasts Of Türkiye, Meli̇h Ertan Çinar, Şermi̇n Açik, Hali̇m Vedat Aker

Turkish Journal of Zoology

The compilation of papers on the phyla Cnidaria and Ctenophora inhabiting the coasts of Türkiye (Black Sea, Sea of Marmara,Aegean Sea, and Levantine Sea) together with the new records of cnidarian species presented in this study yielded 296 cnidarian and8 ctenophore species. Among the cnidarian groups, Hydrozoa were represented by 160 species, Scyphozoa by 16 species, Anthozoa by87 species, and Myxozoa by 31 species. The number of species of cnidarians and ctenophores varies greatly between regions due to thedifferent environmental conditions of the seas and the level of scientific effort in each sea. A total of 47 cnidarian and five …

Diversity Of Platyhelminthes, Xenacoelomorpha, Nematoda, Acanthocephala, Brachiopoda, Kinorhyncha, Nemertea, Chaetognatha, Tardigrada, Gastrotricha, Rotifera, Phoronida, Echinodermata And Chordata (Tunicata, Cephalochordata And Hemichordata) From The Coasts Of Türkiye, Meli̇h Ertan Çinar, Derya Ürkmez, Baki̇ Yokeş

Turkish Journal of Zoology

The current biodiversity of 14 phyla, namely Platyhelminthes, Xenacoelomorpha, Nematoda, Acanthocephala, Brachiopoda,Kinorhyncha, Nemertea, Chaetognatha, Tardigrada, Gastrotricha, Rotifera, Phoronida, Echinodermata, and Chordata (invertebratesonly, including the subphyla Tunicata, Cephalochordata, and Hemichordata) from the coasts of Türkiye is revisited. It was found thata total number of 695 species occur along all the coastlines of Türkiye, with the Black Sea being represented by 297 species, the Sea ofMarmara by 305 species, the Aegean Sea by 308 species, and the Levantine Sea by 204 species. The most species-rich phyla in theseregions were Platyhelminthes (249 species), Nematoda (131), Echinodermata (98), and Chordata (85). A total of …

Diversity Of Annelida From The Coasts Of Türkiye, Meli̇h Ertan Çinar, Şermi̇n Açik, Güley Kurt, Deni̇z Erdoğan Dereli̇

Turkish Journal of Zoology

The compilation of scientific papers dealing with marine annelids (including Sipuncula) along the coasts of Türkiye (Black Sea, Sea of Marmara, Aegean Sea and Levantine Sea) together with the new records of polychaete species (22 species) presented in this study resulted in 827 species belonging to 63 families. Polychaeta were represented by 782 species, Sipuncula by 21 species, Oligochaeta by 18 species, Hirudinea by 5 species and Echiura by 1 species. Syllidae (127 species), Spionidae (57 species) and Serpulidae (56 species) were the most species-rich families and their numbers varied among the seas. Most annelid species were benthic (808 species), …

Diversity Of Mollusca Along The Coasts Of Türkiye, Bi̇lal Öztürk, Banu Bi̇tli̇s, Nesli̇han Türkçü

Turkish Journal of Zoology

The present study is based on a species list published in 2014 and a compilation of data from papers on marine molluscs along the coasts of Türkiye published from that date until the end of April 2024, along with six new records presented herein. Mollusca were represented by 1133 species classified into 7 classes, 255 families and 617 genera on the Turkish coasts. The Pyramidellidae (92 species) and Rissoidae (64 species) were species-rich mollusc families. Most of the listed molluscs were benthic, except for 26 pelagic species and 119 parasitic taxa. The Aegean Sea has the highest number of species …