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Articles 3631 - 3660 of 36498

Full-Text Articles in Animal Sciences

Could There Be A Relationship Between Feeding Characteristics And The Shape Of Condylus Occipitalis And Foramen Magnum In Mammals?, Yasi̇n Demi̇raslan, İsmai̇l Demi̇rci̇oğlu, İftar Gürbüz, Funda Aksünger Karaavci, Abdullah Ortadeveci, Özcan Özgel Jan 2023

Could There Be A Relationship Between Feeding Characteristics And The Shape Of Condylus Occipitalis And Foramen Magnum In Mammals?, Yasi̇n Demi̇raslan, İsmai̇l Demi̇rci̇oğlu, İftar Gürbüz, Funda Aksünger Karaavci, Abdullah Ortadeveci, Özcan Özgel

Turkish Journal of Veterinary & Animal Sciences

The aim of the study was to investigate the shape of the foramen magnum and condylus occipitalis of mammalian species belonging to different feeding groups. For this, two-dimensional geometric morphometric method analyses were applied. The data from the skulls of the 12 species were used. In principal component analysis, the first three principal components accounted for 70.353%of the total shape variation. According to the first principal component, the dorsal edge of the condylus occipitalis and foramen magnum contributed the most to shape variation. Most of the individuals were correctly separated according to the feeding groups. The most accurate grouping features …

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Population Abundance And Growth Parameters Of An Exotic Bivalve Species, Anadara Kagoshimensis, In The Southwestern Black Sea, Murat Dağteki̇n, Göktuğ Dalgiç, Murat Erbay, İlkay Özcan Akpinar, Mehmet Aydin, Süleyman Özdemi̇r, Ayşe Cebeci̇, Sedat Karayücel Jan 2023

Population Abundance And Growth Parameters Of An Exotic Bivalve Species, Anadara Kagoshimensis, In The Southwestern Black Sea, Murat Dağteki̇n, Göktuğ Dalgiç, Murat Erbay, İlkay Özcan Akpinar, Mehmet Aydin, Süleyman Özdemi̇r, Ayşe Cebeci̇, Sedat Karayücel

Turkish Journal of Zoology

Blood cockle (Anadara kagoshimensis) is an Indo-Pacific species that later entered the Black Sea. The abundance of A. kagoshimensis, which is not subjected to commercial fishing, is important in terms of food competition with other bivalvia species. Baby clam (Chamelea gallina) together with the A. kagoshimensis are dominant bivalve species found in the sandy and muddy areas off the coastal waters of the Black Sea. In this study, specimens of A. kagoshimensis have been recognized by morphological analysis and also confirmed by molecular characterization. Furthermore, the abundance and growth parameters of A. kagoshimensis were investigated in the …

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The Black Sea-Eastern Mediterranean Flyway Of The Globally Threatened European Turtle Dove (Streptopelia Turtur), Antonio Bea, Iñaki Olano, Saulius Svazas, Julen Henry, Vadym Yanenko, Gennady Grishanov Jan 2023

The Black Sea-Eastern Mediterranean Flyway Of The Globally Threatened European Turtle Dove (Streptopelia Turtur), Antonio Bea, Iñaki Olano, Saulius Svazas, Julen Henry, Vadym Yanenko, Gennady Grishanov

Turkish Journal of Zoology

The European turtle dove Streptopelia turtur (hereafter turtle dove), is a widespread species in the Palearctic. Due to a large and rapid decline in its abundance, it was classified as "vulnerable" on the International Union for Conservation of Nature's Red List in 2015 and is now regarded as a globally threatened species. The objective of this study was to provide new information on the flyways of this turtle dove population by analyzing available ring recoveries and citizen science sightings data from the Global Biodiversity Information Facility. A new flyway (possibly stretching through the Black and Caspian Seas, Turkey, the Middle …

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A New Amphipod From The Depths Of The Morca Sinkhole (Anamur, Türkiye): Gammarus Morcae N. Sp. (Amphipoda: Gammaridae), With Notes On Cavernicolous Amphipods Of Türkiye, Murat Özbek, Gökhan Aydin Jan 2023

A New Amphipod From The Depths Of The Morca Sinkhole (Anamur, Türkiye): Gammarus Morcae N. Sp. (Amphipoda: Gammaridae), With Notes On Cavernicolous Amphipods Of Türkiye, Murat Özbek, Gökhan Aydin

Turkish Journal of Zoology

A new Gammarus species is identified based on the specimens collected from the Morca Sinkhole, which was discovered in 2019 in Anamur District, South of Türkiye. Eleven individuals belonging to the newly identified species were collected from the siphon located at the end of the sinkhole (-1260 m). The newly identified species can be distinguished by the following character combinations and morphological features: blind, colorless (unpigmented) and completely setae-covered body. Setae are not only on the surfaces of the meta- and mesosome segments, they are also present on the head, coxal + epimeral plates, and basal segments of the pereopods …

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First Record Of The Occurrence Of The Chinese Pond Mussel Sinanodonta Woodiana (Lea, 1834) (Bivalvia: Unionidae) In African Freshwaters: Oubeira Lake, Algeria, Lamia Bensaad-Bendjedid, Salah Telailia, Faiza Alliouche, Hassen Touati, Imen Ladjama Jan 2023

First Record Of The Occurrence Of The Chinese Pond Mussel Sinanodonta Woodiana (Lea, 1834) (Bivalvia: Unionidae) In African Freshwaters: Oubeira Lake, Algeria, Lamia Bensaad-Bendjedid, Salah Telailia, Faiza Alliouche, Hassen Touati, Imen Ladjama

Turkish Journal of Zoology

The Chinese pond mussel Sinanodonta woodiana (Lea, 1834) (Bivalvia: Unionidae) is among the most invasive freshwater species worldwide. The last decades have seen its rapid geographical spread beyond the species' natural range, particularly in anthropogenically modified water bodies across Asia, America, and Europe where it is now very common. In this paper, we also confirm the presence of S. woodiana in Africa (Algeria) by establishing the UNESCO Biosphere Reserve and Ramsar site Oubeira Lake as a new locality for its occurrence. In all likelihood, S. woodiana was accidentally introduced in the 1980s with Asian fish species imported from Hungary for …

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Lethal And Sublethal Effects Of Exposure To Roundup 360 Plus For The Chaoborus Flavicans Larvae (Diptera: Chaoboridae), Zbigniew Adamski, Aleksandra Dziegelewska, Paulina Jakubiak, Piotr Klimaszyk Jan 2023

Lethal And Sublethal Effects Of Exposure To Roundup 360 Plus For The Chaoborus Flavicans Larvae (Diptera: Chaoboridae), Zbigniew Adamski, Aleksandra Dziegelewska, Paulina Jakubiak, Piotr Klimaszyk

Turkish Journal of Zoology

The lethal and sublethal effects of Roundup (active substance glyphosate herbicide on phantom midge (Chaoborus flavicans, Meigen, 1830) larvae were checked in the range of concentrations from 20 to 2000 μg/L, in the five-day long tests. The herbicide caused the mortality of insects, with the LC$_{50}$ values ranging from 357.2 to 120.9 μg of glyphosate/L, for one and five days, respectively. The correlation coefficient >0.9 indicated a strong positive correlation between the concentration of Roundup in water and the mortality of C. flavicans. Also, the LT50 values indicate the toxic activity of the herbicide for the larvae. …

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Biodiversity Of Mosquitoes (Diptera: Culicidae), Vectors Of Important Arboviral Diseases At Different Altitudes In The Central Part Of Iran, Azim Paksa, Mozaffar Vahedi, Saideh Yousefi, Nasrollah Saberi, Sara Rahimi, Masoumeh Amin Jan 2023

Biodiversity Of Mosquitoes (Diptera: Culicidae), Vectors Of Important Arboviral Diseases At Different Altitudes In The Central Part Of Iran, Azim Paksa, Mozaffar Vahedi, Saideh Yousefi, Nasrollah Saberi, Sara Rahimi, Masoumeh Amin

Turkish Journal of Zoology

Risk assessment and vector control programs rely on a comprehensive knowledge of mosquito diversity in different areas. The present study aims to evaluate mosquito biodiversity in different areas of Sirjan County, Kerman Province, as one of the most important economic zones of Iran. Totally 4538 mosquitoes representing 19 species and four genera were collected and identified. Results showed that Culiseta longiareolata and Culex quinquefacsiatus were constant, Culex destricola, Culex pusillus, Culex pipiens and Culex laticinctus were common and the other captured species were accidental species in Sirjan County. In this study, Aedes vittatus was recorded for the first time in …

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New Records Of Gastropods (Caenogastropoda And Heterobranchia) From The Turkish Coasts With Observations On Some Poorly Known Species, Bi̇lal Öztürk, Nesli̇han Türkçü, Banu Bi̇tli̇s Jan 2023

New Records Of Gastropods (Caenogastropoda And Heterobranchia) From The Turkish Coasts With Observations On Some Poorly Known Species, Bi̇lal Öztürk, Nesli̇han Türkçü, Banu Bi̇tli̇s

Turkish Journal of Zoology

This work presents information about 19 taxa recorded from different habitats at depths between 0.2 and 508 m in the last two decades, which are new records or poorly known species along the Turkish coasts. Among the identified species, Epitonium vaillanti, Melanella cf. lubrica, Melanella monterosatoi, Pelseneeria minor, Setia amabilis, Kurtziella serga, Rissoella diaphana, Rissoella inflata, and Spirolaxis clenchi are new records for the Turkish mollusc fauna, Eatonina pumila is new report for the Turkish coast of the Aegean Sea, and Eatonina ochroleuca, Acirsa subdecussata, Lamellaria latens, Setia pulcherrima, Setia valvatoides, and Turbonilla cangeyrani are species with rare distribution …

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Genotoxic Effects Of Oxyclozanide On Hemocytes Of Galleria Mellonella (Lepidoptera: Pyralidae) Larvae, Ci̇hat Çeli̇k, David Stanley, Ender Büyükgüzel Jan 2023

Genotoxic Effects Of Oxyclozanide On Hemocytes Of Galleria Mellonella (Lepidoptera: Pyralidae) Larvae, Ci̇hat Çeli̇k, David Stanley, Ender Büyükgüzel

Turkish Journal of Zoology

Oxyclozanide is a salicylanilide derivative anthelmintic drug with a well-known effect on parasites that cause infections in humans and animals. In this study, the effect of oxyclozanide on DNA damage in hemocytes of Galleria mellonella (L.) (Lepidoptera: Pyralidae) larvae, which has been used as a model organism in many fields, was investigated. Hemolymph was collected from the last instar larvae (7th instar) reared on artificial diets containing oxyclozanide at different concentrations (0.003%, 0.03%, 0.3%, and 1.5%) under laboratory conditions and then hemocytes suspension was prepared. Genotoxic damage in hemocytes was determined by the comet assay which enables microscopically detecting DNA …

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Fauna And Distribution Of Algerian Ichneumonidae (Hymenoptera, Ichneumonidae), Khalida Djouama, Santiago Bordera Jan 2023

Fauna And Distribution Of Algerian Ichneumonidae (Hymenoptera, Ichneumonidae), Khalida Djouama, Santiago Bordera

Turkish Journal of Zoology

In the present paper, 14 species of Ichneumonidae collected in Biskra region (Algeria) are reported. The species Trathala hierochontica (Schmiedeknecht, 1910), Diplazon laetatorius Fabricius, 1781, Ophion obscuratus Fabricius, 1798, Enicospilus tournieri (Vollenhoven, 1879), Dichrogaster schimitcheki (Fahringer, 1935), Dichrogaster longicaudata (Thomson, 1884), Gelis imitatus (Schwarz, 2016) and Lysibia nana (Gravenhorst, 1829) are reported as new records for the Algerian fauna.

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Does Euphrates Softshell Turtle Nest In Unfavourable Substratum? Description Of Nests From Euphrates River, Türkiye, Yusuf Bayrakci Jan 2023

Does Euphrates Softshell Turtle Nest In Unfavourable Substratum? Description Of Nests From Euphrates River, Türkiye, Yusuf Bayrakci

Turkish Journal of Zoology

Nest site selection differs among species based on a characteristic crucial to the embryo's survival. The identified nest-site characteristics of the Euphrates softshell turtle highlight that these turtles, like their other soft-shelled relatives, highly prefer the sandy substrate, even pure sand, to nest. However, alteration and loss of natural habitats for many decades limited the suitable oviposition sites along the Euphrates River. This study presents the uncharacteristic nest-site choice and the nesting time of Euphrates softshell turtle for the first time. I discovered four nests, as well as six unhatched eggs in a nest on 20 August 2017. This discovery …

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Postmucilage Biodiversity Of Shallow Water Fish Assemblages: A Case Study In The Marmara Sea, Turkey, İsmai̇l Burak Daban, Yusuf Şen, Adnan Ayaz, Uğur Altinağaç, Alkan Özteki̇n, Uğur Özeki̇nci̇, Ali̇ İşmen, Fi̇kret Çakir, Ahsen Yüksek, Teki̇n Demi̇rkiran, Oğuzhan Ayaz, Gençtan Erman Uğur, Bumi̇nhan Burkay Selçuk Jan 2023

Postmucilage Biodiversity Of Shallow Water Fish Assemblages: A Case Study In The Marmara Sea, Turkey, İsmai̇l Burak Daban, Yusuf Şen, Adnan Ayaz, Uğur Altinağaç, Alkan Özteki̇n, Uğur Özeki̇nci̇, Ali̇ İşmen, Fi̇kret Çakir, Ahsen Yüksek, Teki̇n Demi̇rkiran, Oğuzhan Ayaz, Gençtan Erman Uğur, Bumi̇nhan Burkay Selçuk

Turkish Journal of Zoology

A dense mucilage event occurred between November 2020 and August 2021 in the Marmara Sea, Turkey. In this study, the aim was to understand the effect of mucilage on coastal fish biodiversity. For this purpose, juvenile and small-sized adult fish species were sampled with an experimental beach seine at 12 equally-spaced stations around the Marmara Sea between November 2021 and April 2022. In total, 34 species belonging to 19 families were sampled. Approximately 70% of the total fish abundance were Atherina boyeri Risso, 1810, Chelon auratus (Risso, 1810) and Chelon saliens (Risso, 1810). Highest abundance was detected from S5 …

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Length-Weight Relationships And Relative Condition Factors Of Three Coral-Associated Lutjanus Species From Terengganu Waters Of The South China Sea, Malaysia, Md. Moshiur Rahman, Nur Asma Ariffin, Ying Giat Seah, Tun Nurul Aimi Mat Jaafar, Ahasan Habib Jan 2023

Length-Weight Relationships And Relative Condition Factors Of Three Coral-Associated Lutjanus Species From Terengganu Waters Of The South China Sea, Malaysia, Md. Moshiur Rahman, Nur Asma Ariffin, Ying Giat Seah, Tun Nurul Aimi Mat Jaafar, Ahasan Habib

Turkish Journal of Zoology

The present study offers the first report of length-weight relationships (LWRs) and relative condition factor (K$_{n}$) of coralassociated snapper fishes namely: Lutjanus johnii, L. quinquelineatus, and L. xanthopinnis collected from Pulau Kambing fish landing port, Terengganu waters of South China Sea, Malaysia. This study also offers a new maximum total length of 26.8 cm (standard length of 21.3 cm) for L. xanthopinnis. A total of 861 specimens were collected monthly from March 2022 to February 2023 that were caught by using different types of fishing gear such as gill nets (mesh size 45-48 mm), hooks (numbers 9-12), and …

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Ecomorphological Patterns And Shape Indices Of Otoliths In The Pagellus Acarne (Actinopterygii, Sparidae) From The Aegean And Marmara Seas, Serdar Yedi̇er, Seda Kontaş Yalçinkaya, Di̇lek Türker, Derya Bostanci Jan 2023

Ecomorphological Patterns And Shape Indices Of Otoliths In The Pagellus Acarne (Actinopterygii, Sparidae) From The Aegean And Marmara Seas, Serdar Yedi̇er, Seda Kontaş Yalçinkaya, Di̇lek Türker, Derya Bostanci

Turkish Journal of Zoology

Pagellus acarne is found in coastal waters worldwide and it includes important species of commercial and recreational fisheries. In this study, 16 morphometric variables of the sagittal otolith, including six morphometric characters, six shape indices, and four ecomorphological indexes, were investigated for the first time among P. acarne stocks collected from the Aegean and Marmara Seas coasts of Turkey. Statistically significant differences were found between the right and left otolith variables of P. acarne individuals in both stocks (p < 0.05). Similarly, significant differences were observed on the same side between stocks (p < 0.05). The right otoliths exhibited higher discrimination power than the left within the two stocks. The PCA showed that only five (31.25%) (otolith area, otolith perimeter, form factor, roundness, and edge complexity index) out of the sixteen variables were quite important characters in the differentiation between stocks. These otolith characters demonstrated a very high rate of accurate discrimination (99.0%) between stocks. The results indicated otolith morphometric characters, shape indices, and ecomorphological indexes can be used as suitable tools to discriminate P. acarne stocks. This is the first study to include all otolith characters such as morphometrics, shape, and ecomorphological indices that …

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Discrimination Between Six Commercially Relevant And Ecologically Diverse Fish Species Across The Gulf Of Tunis Using Fatty Acid Composition And Otolith Shape Analyses, Nawzet Bouriga, Wafa Rjiba Bahri, Safa Bejaoui, Madel F. Adjibayo Houeto, Adel A. Basyouny Shahin, Jean-Pierre Quiganrd, Monia Trabelsi, Abderraouf Ben Faleh Jan 2023

Discrimination Between Six Commercially Relevant And Ecologically Diverse Fish Species Across The Gulf Of Tunis Using Fatty Acid Composition And Otolith Shape Analyses, Nawzet Bouriga, Wafa Rjiba Bahri, Safa Bejaoui, Madel F. Adjibayo Houeto, Adel A. Basyouny Shahin, Jean-Pierre Quiganrd, Monia Trabelsi, Abderraouf Ben Faleh

Turkish Journal of Zoology

Fatty acid composition and otolith shape variation of six commercially important fishes, which differ ecologically in their living and feeding habits across the Gulf of Tunis, Tunisia, were analyzed. The aims were to investigate the discrimination and relationship between the six species using both fatty acid composition and otolith shape to examine whether variability in fatty acid composition is consistent with variation in otolith shape and check whether otoliths shape and fatty acids composition have combined characteristic signals for these species. Tukey's test with one-way ANOVA indicated significant differences in total percentages of saturated (SFAs), polyunsaturated (PUFAs), and monounsaturated (MUFAs) …

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Discovering Underground Bat Hibernacula In Lowland Eastern Europe, Lena Godlevska, Aliaksei Shpak, Mariia Savchenko, Pavlo Vorobei Jan 2023

Discovering Underground Bat Hibernacula In Lowland Eastern Europe, Lena Godlevska, Aliaksei Shpak, Mariia Savchenko, Pavlo Vorobei

Turkish Journal of Zoology

The importance of underground hibernacula for the conservation of bats and monitoring their populations is well-recognized. However, the lowland territory of Belarus, with absent natural caves and suitable for bats mines, was one of the least surveyed European regions in terms of underground bat sites, and especially hibernacula. To address this knowledge gap, in 2020, we conducted a broadscale one winter bat survey, exploring 90 underground sites (basements, cellars, church crypts, fortifications, and facilities of abandoned Soviet missile bases) in various parts of Belarus. To our knowledge, none of these sites had been examined for bats before. In 56 of …

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Diversity And Prevalence Of Ornithophilic Louse Flies (Diptera: Hippoboscidae: Ornithomyinae) In Serbia, Tibor Rekecki, Drazenko Rajkovic Jan 2023

Diversity And Prevalence Of Ornithophilic Louse Flies (Diptera: Hippoboscidae: Ornithomyinae) In Serbia, Tibor Rekecki, Drazenko Rajkovic

Turkish Journal of Zoology

Ectoparasites are diverse organisms that exploit animal hosts using various strategies. One such group represents the louse flies (Hippoboscidae) from the subfamily Ornithomyinae, which are permanent, highly specialised, hematophagous ectoparasites of poultry and wild birds found worldwide. The main objective of this research is to examine the mean abundance, prevalence, and diversity of ornithophilic louse flies in Serbia. They have been detected through visual inspection or fumigation of caught birds. In total, 79 louse flies belonging to four genera and six species were collected from 62 individuals within 26 host species. A single louse fly infested the bulk of captured …

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Assessing Forest Features And Nocturnal Flying Insect Diversity As Predictors Of Eastern Whip-Poor-Will Occupancy In Foraging Habitat, Clark D. Alexander Jan 2023

Assessing Forest Features And Nocturnal Flying Insect Diversity As Predictors Of Eastern Whip-Poor-Will Occupancy In Foraging Habitat, Clark D. Alexander

Graduate Theses, Dissertations, and Problem Reports (ETD)

Eastern whip-poor-will (Antrostomus vociferus), an insectivorous caprimulgid, have seen an approximate 2.76% annual population decrease since the 1960s, with their breeding and foraging ecology largely unknown due to their nocturnal and cryptic behavior. I conducted research to assess abiotic and biotic variables correlated with detection, and occupancy probability, and prey species diversity on ~104,000 hectares of forest in West Virginia, owned by the private timber company Weyerhaeuser. Previous literature indicates that Eastern whip-poor-will, and their prey, require ephemeral habitat such as recently cleared and early successional forests, like those historically created by forest fires, wind shears, hurricanes, and …

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Long Term Changes In Aquaculture Influence Migration, Regional Abundance, And Distribution Of An Avian Species, Paul C. Burr, Brian S. Dorr, Jimmy L. Avery, Garrett M. Street, Bronson K. Strickland Jan 2023

Long Term Changes In Aquaculture Influence Migration, Regional Abundance, And Distribution Of An Avian Species, Paul C. Burr, Brian S. Dorr, Jimmy L. Avery, Garrett M. Street, Bronson K. Strickland

United States Department of Agriculture Wildlife Services: Staff Publications

Agricultural development has been causing changes to the environment and the abundance and distribution of avian species. Agriculture is dynamic with changes in products occurring at large scales over relatively short time periods. The catfish aquaculture industry is one such agriculture industry that has undergone dramatic changes over the last 25 years. The double-crested cormorant (Nannopterum auritum) is a piscivorous bird that has an extensive history with the aquaculture industry of Mississippi due to its depredation of cultured catfish. A large-scale monitoring program began in 1989 to estimate the abundance and location of cormorants at every known roost in the …

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The Past, Present, And Future Of Equine Science, Sarah H. White-Springer, Jason E. Bruemmer, Robert J. Coleman Jan 2023

The Past, Present, And Future Of Equine Science, Sarah H. White-Springer, Jason E. Bruemmer, Robert J. Coleman

United States Department of Agriculture Wildlife Services: Staff Publications

A core group of 27 equine nutritionists and physiologists joined together in the late 1960s to formally address and enhance the direction of equine research, creating the Equine Nutrition and Physiology Soci- ety. In 2003, that growing society transformed into the Equine Science Society, which now serves as the preeminent, internationally recognized scientific equine organization. In recent years, it has been appre- ciated that equine science encompasses a wide range of focus areas, including exercise science, nutrition, genetics, reproductive physiology, teaching and extension, production and management, and mix of other specialties, qualified as biosciences. Additionally, trainees are highly valued in …

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Using Drones To Detect And Quantify Wild Pig Damage And Yield Loss In Corn Fields Throughout Plant Growth Stages, Bethany A. Friesenhahn, Lori D. Massey, Randy W. Deyoung, Michael J. Cherry, Justin W. Fischer, Nathan P. Snow, Kurt C. Vercauteren, Humberto L. Perotto‐Baldivieso Jan 2023

Using Drones To Detect And Quantify Wild Pig Damage And Yield Loss In Corn Fields Throughout Plant Growth Stages, Bethany A. Friesenhahn, Lori D. Massey, Randy W. Deyoung, Michael J. Cherry, Justin W. Fischer, Nathan P. Snow, Kurt C. Vercauteren, Humberto L. Perotto‐Baldivieso

United States Department of Agriculture Wildlife Services: Staff Publications

Presently, there are an estimated 6.9 million wild pigs (Sus scrofa) in the U.S., which cause over US$1 billion in damage to agriculture, environmental impacts, and control costs. However, estimates of damage have varied widely, creating a need for standardized monitoring and a method to accurately estimate the economic costs of direct wild pig damage to agriculture. The goal of our study was to integrate remotely sensed imagery from drones and crop harvest data to quantify wild pig damage in corn fields. We used drones with natural color (red, green, blue) cameras to monitor corn fields at different …

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The Impact Of The Covid‑19 Pandemic On Wildlife–Aircraft Collisions At Us Airports, Levi Altringer, Sophie C. Mckee, Jason D. Kougher, Michael J. Begier, Stephanie A. Shwiff Jan 2023

The Impact Of The Covid‑19 Pandemic On Wildlife–Aircraft Collisions At Us Airports, Levi Altringer, Sophie C. Mckee, Jason D. Kougher, Michael J. Begier, Stephanie A. Shwiff

United States Department of Agriculture Wildlife Services: Staff Publications

Exploiting unprecedented reductions in aircraft movements caused by the COVID-19 pandemic, we investigated the relationship between air traffic volume and the frequency of wildlife-aircraft collisions, or wildlife strikes, at the 50 largest airports in the United States. During the COVID- 19 months of 2020 (March–December), both air traffic volume and the absolute number of wildlife strikes were reduced. The net effect of these two movements, however, was an increase in the wildlife strike rate from May 2020–September 2020. This increase was found to be most pronounced at airports with larger relative declines in air traffic volume. We concluded that the …

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Echinococcus Species Infections Among Wild Canids In Pennsylvania, Usa, Kayla Garrett, Justin Brown, Ryan K. A. Grunert, Jonathan Hunte, Mark G. Ruder, Kyle Van Why, Michael J. Yabsley, Christopher A. Cleveland Jan 2023

Echinococcus Species Infections Among Wild Canids In Pennsylvania, Usa, Kayla Garrett, Justin Brown, Ryan K. A. Grunert, Jonathan Hunte, Mark G. Ruder, Kyle Van Why, Michael J. Yabsley, Christopher A. Cleveland

United States Department of Agriculture Wildlife Services: Staff Publications

Echinococcus species are zoonotic tapeworms that can impact the health of wildlife, domestic animals, livestock, and humans. Two species of interest in North America are Echinococcus multilocularis and Echinococcus canadensis (Echinococcus granulosus sensu lato). The primary wildlife definitive hosts for E. multilocularis and E. canadensis are similar, including red foxes (Vulpes vulpes), gray foxes (Urocyon cinereoargenteus), coyotes (Canis latrans), and wolves (Canis lupus). These two Echinococcus spp. use different intermediate hosts, including small mammals for E. multilocularis and artiodactylids for E. canadensis. Although historically absent from …

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Turkey Vulture Survival Is Reduced In Areas Of Greater Road Density, Adrián Naveda-Rodríguez, Keith L. Bildstein, David R. Barber, Jean-François Therrien, Michael L. Avery, Bryan M. Kluever, Scott A. Rush, Francisco J. Vilella Jan 2023

Turkey Vulture Survival Is Reduced In Areas Of Greater Road Density, Adrián Naveda-Rodríguez, Keith L. Bildstein, David R. Barber, Jean-François Therrien, Michael L. Avery, Bryan M. Kluever, Scott A. Rush, Francisco J. Vilella

United States Department of Agriculture Wildlife Services: Staff Publications

The demography of, and factors that influence these metrics, are largely unknown for most vultures in the Americas. Survivorship of turkey vultures (Cathartes aura) may be influenced by landscape heterogeneity and human disturbance. We quantified the effects of landscape composition (Shannon’s diversity index) and configuration (contagion, edge density, and largest patch index), and human disturbance (road density) on the annual and seasonal survival probabilities of the three North American breeding populations (western, central, and eastern) of turkey vultures that spend the nonbreeding season in the southeastern portion of the Nearctic and the northern Neotropics during a 17-year period. …

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Comparison Of Corticosterone Concentrations Between Serum And Fecal Samples As A Measure Of Stress In Male Broilers., Kayla Weinacht Jan 2023

Comparison Of Corticosterone Concentrations Between Serum And Fecal Samples As A Measure Of Stress In Male Broilers., Kayla Weinacht

Murray State Theses and Dissertations

Stress has long been a topic of interest in the poultry industry due to its potential negative effects on chicken health and production of both eggs and meat. With increased global growth in egg and broiler production, more attention has been paid to the stressors that affect chickens in modern poultry operations, particularly environmental temperature and stocking density. Improving quantitative measurement of stress is always needed in poultry welfare research. In most studies, blood serum is measured for corticosterone, one of the biomarker hormones associated with stress in chickens. Methods of collecting blood serum are by their nature disruptive to …

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Amphisbaenian Head Movement And Burrowing Forces In Damp Granular Media, Jacob Newell Jan 2023

Amphisbaenian Head Movement And Burrowing Forces In Damp Granular Media, Jacob Newell

Williams Honors College, Honors Research Projects

Damp granular media is a difficult environment to study because it is both practically complex and it lacks equations which fully describe its behavior. In this study, an oscillatory lateral head movement and its effects while penetrating damp granular media were tested using a robophysical model. This experimental research was inspired by the burrowing behavior of the clade Amphisbaenia, a group of usually limbless squamates that employ a variety of different burrowing behaviors, but it can apply to a wide range of burrowers. This research could help with both human burrowing technologies and the further investigation of animal behaviors.

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Effects Of Oyster Aquaculture On Elasmobranch Abundance And Habitat Use In Humboldt Bay, Ca, Rose Harman Jan 2023

Effects Of Oyster Aquaculture On Elasmobranch Abundance And Habitat Use In Humboldt Bay, Ca, Rose Harman

Cal Poly Humboldt theses and projects

Habitat modification from aquaculture can have large effects on natural communities, with the habitat complexity provided by aquaculture structure positively influencing benthic invertebrates and small fish abundance. However, the effects of aquaculture on larger predatory fish like elasmobranchs (i.e., sharks and rays), which use nearshore habitat to forage and provide top-down control of these ecosystems, is largely unknown. Over two years, I deployed baited remote underwater video systems (BRUVS) to examine the effects of oyster aquaculture and environmental variables such as habitat (mudflat or eelgrass), salinity (ppt), turbidity (m), temperature (°C), pH (mV), dissolved oxygen (mg · L-1), …

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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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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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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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