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Comparison Of Lateral Flow To Other Pregnancy Determination Methods In Order To Determine Accuracy Of Pregnancy Status In Beef Cattle Pre And Postpartum, Adalaide C. Kline, Julie Walker, Taylor N. Andrews, Saulo Menegatti Zoca, Kaitlin M. Epperson, Lacey K. Quail, Jaclyn N. Ketchum, Jerica J.J. Rich, Jim R. Rhoades, George Perry

SDSU Beef Day 2022 Summary Publication

Study Description:

Blood samples were collected from six different Bos taurus herds between day 27 and 285 of gestation (heifers n = 1,205 and cows n = 1,539). Blood samples to determine PAG clearance interval were collected weekly postpartum for up to 12 weeks (heifers n = 418 and cows n = 657). Serum was tested using the lateral flow test and were read by two technicians who were blind to pregnancy status. Level of agreement between the tests were determined by Pearson’s correlation coefficients and Kappa scores. The MIXED procedure of SAS was used to evaluate the effect of …

Use Of Sperm In Vitro Capacitation And Flow Cytometry To Estimate Bull Fertility, Saulo Menegatti Zoca, Thomas W. Geary, Abigail L. Zezeski, Karl C. Kerns, Joseph C. Dalton, Bo R. Harstine, Matthew D. Utt, Robert A. Cushman, Julie Walker, George Perry

SDSU Beef Day 2022 Summary Publication

Study Description:

Frozen-thawed semen from five bulls previously identified as high (48.1% and 47.7%, bulls A and B, respectively), intermediary (45.5%, bull C) or low (43.1% and 40.7%, bulls D and E, respectively) fertility, based on pregnancy per AI, were evaluated with several laboratory measures. Measures included total motility, sperm plasma membrane integrity (viability), acrosome integrity, reactive oxygen species (ROS), mitochondrial membrane energy potential (mito-potential), zinc signatures (signatures 1 to 4), and CD9 protein populations at pre-wash, post-wash, h 0 (diluted with non-capacitation media), and at 0, 3, 6, and 24 h after dilution with capacitation media and incubation at …

Relationship Of Dag1 And Serpina5 Sperm Proteins With Bull Fertility, Saulo Menegatti Zoca, Julie Walker, Jerica J. J. Rich, Kaitlin M. Epperson, Taylor N. Andrews, Adalaide C. Kline, Jessica Nora Drum, M. Sofia Ortega, George Perry

SDSU Beef Day 2022 Summary Publication

Study Description:

Semen from 22 dairy bulls was used to evaluate the presence, localization, and quantification of DAG1 and SERPINA5 on sperm. Sperm motility parameters and viability was also evaluated for semen from each bull. Semen from 19 out of the 22 dairy bulls was used for in vitro embryo production (two Low-SCR and one High-SCR were not available for in vitro embryo production). Bulls were classified based on their sire conception rates (SCR) values as High-SCR (SCR > 1.0) or Low-SCR fertility (SCR < -4.0). Low fertility bulls were subdivided based on their blastocyst rate (BL) as High-BL (Low-SCR/High-BL BL ≥ 31%) or Low-BL (Low-SCR/Low-BL BL ≤ 26%), and High-SCR bulls were not subdivided. The GLM procedure in SAS was used with bull as a fixed effect to determine if variance was greater between bulls compared to within bull. Correlations were determined among DAG1 and SERPINA5 concentrations, percentage of tail labeled for SERPINA5, SCR, sperm total motility, progressive motility, and viability, and in vitro embryo produced cleavage rate (CL) and BL. The GLIMMIX procedure of SAS was used to evaluate the relationship of bull field fertility (High- and Low-SCR), and field and in vitro fertility (High-SCR, Low-SCR/High-BL, Low-SCR/Low-BL) classifications with sperm total (TMOT) and progressive (PROG) motility, viability, CL, BL, DAG1 and SERPINA5 relative concentration, and proportion of sperm tail labeled for SERPINA5. Both SERPINA5 and DAG1 were localized on the sperm head; however, SERPINA5 was also localized on the sperm tail. There was greater variance in concentration among bulls compared to within bull for both DAG1 (P < 0.01; 69.4 vs 49.1, respectively) and SERPINA5 (P < 0.01; 325.8 vs 285.4, respectively). There was a positive correlation between concentration of DAG1 and SERPINA5 (P = 0.01; r = 0.54). Concentrations of SERPINA5 were also correlated with CL (P = 0.04; r = 0.48), and percentage of sperm tail labeled for SERPINA5 was correlated with viability (P = 0.05; r = 0.44) and tended to be correlated with CL (P = 0.10; r = 0.39). There was no relationship between SCR or BL rate classifications and DAG1 (P ≥ 0.66), SERPINA5 (P ≥ 0.54), or percentage of sperm tail labeled for SERPINA5 (P ≥ 0.48).

Territory Holders Are More Aggressive Towards Older, More Dangerous Floaters, Walter H. Piper, Katherine R. Lee, Brian Hoover

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

Animals that show aggression often risk injury and incur steep energetic costs. Thus, aggression should occur at such times and towards such opponents as to maximize fitness. We tested hypotheses predicting adaptive territorial aggression in the common loon, a species in which ease of observation of territory owners and floaters (prebreeders) seeking to evict them provide a rare window onto owner-floater competition. As predicted, older, more competitive floaters (4-year-olds and upwards) tended to intrude into territories that had produced chicks the previous year (and, hence, were of high quality). Older floaters also showed predicted increases in aggression and territorial yodeling, …

Proteomic Analysis Of Epididymal And Ejaculated Sperm And Respective Fluids, Saulo Menegatti Zoca, Emmalee J. Northrop-Albrecht, Julie Walker, Robert A. Cushman, George Perry

SDSU Beef Day 2022 Summary Publication

Study Description:

Ejaculated and epididymal semen was collected from mature Angus bulls (n = 9), and then centrifuged to separate sperm and fluid. Fluids were collected and sperm pellets were resuspended in a high ionic solution and vortexed to remove loosely attached proteins. Sperm samples were centrifuged, and the supernatant was collected. Samples collected for protein analysis were snap frozen in liquid nitrogen and stored at -80 ºC. Protein analysis was performed by liquid chromatography with tandem mass spectrometry (LCMS/MS). Yearling Angus cross bulls (n = 40) were used for sperm cultures. Ejaculated (n = 20) and epididymal (n = …

Behavioral Responses Of Blue-Winged Teal And Northern Shoveler To Unmanned Aerial Vehicle Surveys, Mason D. Ryckman, Kaylan Kemink, Christopher J. Felege, Brian J. Darby, Gregory S. Vandeberg, Susan N. Ellis-Felege

Biology Faculty Publications

Unmanned aerial vehicles (UAVs) have become a popular wildlife survey tool. Most research has focused on detecting wildlife using UAVs with less known about behavioral responses. We compared the behavioral responses of breeding blue-winged teal (Spatula discors) (n = 151) and northern shovelers (Spatula clypeata) (n = 46) on wetlands flown over with a rotary DJI Matrice 200 quadcopter and control wetlands without flights. Using a GoPro camera affixed to a spotting scope, we conducted focal individual surveys and recorded duck behaviors for 30 minutes before, during, and 30 minutes after UAV flights to determine if …

Genetic Parameters, Heterosis, And Breed Effects For Body Condition Score And Mature Cow Weight In Beef Cattle, André Mauric F. Ribeiro, Leticia P. Sanglard, Warren M. Snelling, R. Mark Thallman, Larry A. Kuehn, Matthew L. Spangler

Department of Animal Science: Faculty Publications

Understanding the genetic relationship between mature cow weight (MWT) and body condition score (BCS) is useful to implement selection programs focused on cow efficiency. The objectives of this study were to estimate genetic parameters, heterosis, and breed effects for MWT and BCS. In total, 25,035 and 24,522 overlapping records were available for MWT and BCS on 6,138 and 6,131 cows, respectively, from the Germplasm Evaluation program, a crossbred beef population at the U.S. Meat Animal Research Center. Pedigree was available for 48,013 individuals. Univariate animal models were used to estimate heritabilities for each trait by parity. …

Crassostrea Gigas Invasion In Southern California: Macrofaunal Diversity And Local Community Impacts Of Ecosystem Engineers On Estuarine Habitats, Noah Jansen-Yee

Theses

Many marine ecosystems are facing the growing threat of biological invasions. These invasions can have a variety of different impacts on ecosystems and their inhabitants. The Pacific oyster, Crassostrea gigas, is currently in the relatively early stages of invasion in San Diego estuaries. Crassostrea gigas is a large, filter-feeding bivalve that forms dense oyster beds on hard substrate. These oysters are known to outcompete native counterparts and drastically alter habitats where they are present. Crassostrea gigas is an ecosystem engineer that, through shell creation and formation of a dense oyster matrix, impacts ecosystems in a variety of direct and indirect …

Influence Of Beef Carcass Chilling Rate On Steak Case Life And Quality Traits, Trevor Dehaan, Lydia Hite, Erin Gubbels, Christina Elaine Bakker, Amanda D. Blair, Judson Grubbs, Keith Underwood

SDSU Beef Day 2022 Summary Publication

Study Description:

Twelve head of fed beef cattle were harvested at the SDSU Meat Laboratory over two days. Carcasses were allotted into two weight groups based on hot carcass weight (HCW): Heavyweight (HW) and Lightweight (LW). Data logging thermometers were placed in the left side of each carcass within the round, loin, rib, and chuck primals to track temperature decline. Carcass measurements including 12th rib fat thickness, ribeye area and marbling score were collected approximately 48 hours postmortem. Steaks from each primal were collected to measure Warner-Bratzler shear force (WBSF), objective and subjective color.

Case Study: Degenerative Joint Disease In Canines, Zachary B. Lawrence, Rusty Rogers, Emily Schmitt Lavin

Mako: NSU Undergraduate Student Journal

Degenerative joint disease (DJD) is the gradual degeneration of cartilage in joints, resulting in pain for the affected areas. This study focused on Lacy (name changed for privacy), a 10-year-old spayed female chihuahua mix, that was clinically diagnosed for DJD and treated by Dr. Rogers over a period of 15 months. DJD is typically treated through a combination of pharmacological management, nonpharmacological treatment, and changes in lifestyle. Pharmacological treatment utilized pain medications, such as Gabapentin and Tramadol. Nonpharmacological treatment and changes in lifestyle involve methods, such as maintaining an ideal body weight, to decrease pain and increase mobility. However, during …

Bovine Respiratory Microbiota Of Feedlot Cattle And Its Association With Disease, Jianmin Chai, Sarah F. Capik, Beth Kegley, John T. Richeson, Jeremy G. Powell, Jiangchao Zhao

Animal Science Faculty Publications and Presentations

Bovine respiratory disease (BRD), as one of the most common and costly diseases in the beef cattle industry, has significant adverse impacts on global food security and the economic stability of the industry. The bovine respiratory microbiome is strongly associated with health and disease and may provide insights for alternative therapy when treating BRD. The niche-specific microbiome communities that colonize the inter-surface of the upper and the lower respiratory tract consist of a dynamic and complex ecological system. The correlation between the disequilibrium in the respiratory ecosystem and BRD has become a hot research topic. Hence, we summarize the pathogenesis …

Observations On Regeneration Of The Pedipalp And Legs Of Scorpions, Martin Watz, Jason A. Dunlop

Euscorpius

An Opisthacanthus asper (Peters, 1861) (Hormuridae) shows a relatively rare example of pedipalp regeneration in which the lost tibia and tarsus was replaced by a smaller, curved element of uncertain homology to either the fixed or free finger. A comparable abnormal palp described in the literature hints that pedipalps can only regenerate a structure of this form, regardless of the site of amputation. An Olivierus caucasicus (Nordmann, 1840) (Buthidae) is described in which claws (pretarsus) of leg III regenerated directly at the distal end of the tibia, while in leg IV the claws regenerated at the end of a truncated …

Associations Between Feeding Behaviors Collected From An Automated Milk Feeder And Neonatal Calf Diarrhea In Group Housed Dairy Calves: A Case-Control Study, Meridith H. Conboy, Charlotte B. Winder, Melissa C. Cantor, Joao H. C. Costa, Michael A. Steele, Catalina Medrano-Galarza, Taika E. Von Konigslow, Amanda Kerr, Dave L. Renaud

Animal and Food Sciences Faculty Publications

The objective of this case-control study was to determine if feeding behavior data collected from an automated milk feeder (AMF) could be used to predict neonatal calf diarrhea (NCD) in the days surrounding diagnosis in pre-weaned group housed dairy calves. Data were collected from two research farms in Ontario between 2017 and 2020 where calves fed using an AMF were health scored daily and feeding behavior data (milk intake (mL/d), drinking speed (mL/min), number of rewarded or unrewarded visits) was collected. Calves with NCD were pair matched to healthy controls (31 pairs) by farm, gender, and age at case diagnosis …

Effects Of Increasing Dietary Zinc Sulfate Fed To Gestating Ewes: Ii. Milk Somatic Cell Count, Microbial Populations, And Fatty Acid Composition, C. M. Page, R. M. Knuth, T. W. Murphy, D. C. Rule, B. Bisha, J. B. Taylor, W. C. Stewart

Roman L. Hruska U.S. Meat Animal Research Center: Reports

Objective: The objective of the research was to evaluate the effects of increasing dietary Zn sulfate concentration for primiparous gestating ewes on subsequent milk SCC, intramammary microbial identifications, and fatty acid composition.

Materials and Methods: Commercial white-face (WF; n = 27) and black-face (BF; n = 24) ewes (age ≈18 mo; BW = 87.48 ± 8.37 kg) were sorted into breed-type groups and within groups ranked by BW, and then, they were randomly divided into 3 dietary supplement treatment groups: CON (n = 13; 40 mg/kg Zn; ≈1 × NASEM recommendations), Zn500 (n = 21; 500 mg/kg Zn; …

Effects Of Harvest Season On Carcass Characteristics Of Lambs In The Intermountain West, J. R. Whaley, T. W. Murphy, C. L. Gifford, W. J. Means, J. P. Ritten, H. N. Mckibben, C. M. Page, W. C. Stewart

Roman L. Hruska U.S. Meat Animal Research Center: Reports

Objective: The objectives of this study were to survey characteristics including hot carcass weight (HCW), 12th rib fat thickness (RFT), body-wall thickness (BWT), longissimus muscle area (LMA), USDA yield grade (USDA YG), percentage closely trimmed retail cuts (RC), and calculated yield grade (Calc YG) of lamb carcasses in the Intermountain West to determine the effects of season of slaughter and interrelationships among carcass characteristics.

Materials and Methods: Lamb carcass characteristics were evaluated in 2 commercial Intermountain West processing plants over one year (n = 10,027). Carcasses were evaluated by season: spring (December–April, n = 2,322) and summer (May–August, n …

Invasive Plants Watch List: 2022, Allison Zach

Nebraska Invasive Species Program

The purpose of the weed watch list is to collect data on the distribution of invasive plants found in various Nebraska counties. Counties were divided up into ‘ecoregions’ based on the Nebraska Game & Parks Commission’s Legacy Plan (map of regions below). The plants in the watch list have been identified based on their invasiveness in surrounding states and their increasing range in Nebraska. Data collected on watch list plant species distribution has been used to support the listing or delisting of noxious weeds. Plant species in the weed watch list are categorized based on early detection and rapid response …

The Life History Of Euborellia Annulipes (Lucas) (Dermaptera: Anisolabididae) Fed Onlarvae And Pupae Of Plutella Xylostella (L.) (Lepidoptera: Plutellidae), Gilmar Da Silva Nunes, Thais Aparecida Vitoriano Dantas, Wennia Rafaelly Souza Figueiredo, Roberio De Oliveira, Jacinto De Luna Batista, Alessandra Marieli Vacari, Sergio Antonio De Bortoli

Turkish Journal of Zoology

Euborellia annulipes (Lucas) (Dermaptera: Anisolabididae) is reported as a potential predator of Plutella xylostella (L.) (Lepidoptera: Plutellidae). In this study, we aimed to investigate whether fourth instar larvae, 1 or 3-day-old pupae of P. xylostella are suitable food for the development and reproduction of E. annulipes. We evaluated the characteristics of the predation, development of each life stage, and reproduction of the predator, by comparing them with an artificial diet. The nymphs consumed larvae and pupae equally in the first instars, but, from the third to fifth, they consumed more larvae over pupae. Both males and females consumed more larvae …

High Temperatures Adversely Affect The Hoverfly Episyrphus Balteatus(Diptera: Syrphidae) Fitness And Aphid Prey Consumption, Gregoire Noel, Jessica Caetano, Solene Blanchard, Antoine Boullis, Frederic Francis

Turkish Journal of Zoology

Numerous studies have shown that an increase of environmental temperature could directly disturb insect larval development. Natural enemies of insect pests, particularly predators of aphid populations, are not spared. Following temperature predictions of Belgian climate change scenario, the goal of this study is to measure life-history traits, such as the mass, body length and aphid consumption (Acyrthosiphon pisum (Harris, 1776)) (Hemiptera: Aphididae) of Episyrphus balteatus (De Geer, 1776) (Diptera: Syrphidae) larvae under three constant temperature treatments (i.e. 20, 23, and 26 °C). We detected no significant differences between 20 °C and 23 °C on the hoverflies larval development, their aphidophagous …

Effect Of Urban Habitats On Colony Size Of Ants (Hymenoptera, Formicidae)In Memory Of Professor A. A. Zakharov (Russian Academy Of Sciences, Moscow), Stanislav Stukalyuk, Ascar Akhmedov, Alexey Gilev, Alexander Reshetov, Yuri Radchenko, Nataly Kosiuk

Turkish Journal of Zoology

Urbanized ecosystems are suitable for the habitat of only a few species of ants, due to conditions caused by human activities. Invasive species of ants have adapted to urbanized ecosystems most successfully. The study of the ant colonies sizes started in Crimea in 2013-2014. In 2019-2021 it was carried out in Ukraine (the Carpathians, Kyiv city, and Kyiv region), in Russia (Rostov-on-Don city and region, and the Urals), and in Uzbekistan (Tashkent city, and tugai forests). The study covers natural (forest, meadow, steppe), suburban (alleys and tree planting) and urban habitats (tree planting along streets and roads, botanical gardens). Our …

Using Of Fluctuating Asymmetry In Adult Pelophylax Ridibundus (Amphibia: Anura:Ranidae) Meristic Traits As A Method For Assessing Developmental Stability Of Populationand Environmental Quality Of Their Habitat: Industrial Area In Southern Bulgaria, Zhivko Zhelev, Stefan Tsonev, Peter Boyadzhiev

Turkish Journal of Zoology

One way to assess the impacts of toxicants on populations of anurans is through developmental stability (DS) - the ability to buffer stresses during development stages. To assess the extent of possible perturbations in DS of frogs that inhabit a polluted industrial area east of Plovdiv city, Bulgaria, we applied analysis of fluctuating asymmetry (FA) in ten morphological traits in P. ridibundus. As a control group, we used animals inhabiting a less disrupted site. Based on the FA levels obtained for the frogs from both sites, we evaluate the state of their habitat. In the contaminated site, the mean FAMI …

Distribution And Molecular Differentiation Of Culex Pipiens Complex Species In Themiddle And Eastern Black Sea Regions Of Turkey, Muhammet Mustafa Akiner, Murat Öztürk, Fati̇h Şaban Beri̇ş, Çağaşan Karacaoğlu, Fati̇h Mehmet Şi̇mşek, Aytül Uzun Akgeyi̇k

Turkish Journal of Zoology

Culex pipiens species complex is commonly found in tropical and subtropical areas. Identification of species complexes and their spatial distribution patterns are fundamental steps needed to improve our understanding of arboviral disease circulation and their control. The specimens were differentiated using the Ace-2 gene, and the ecological forms of Culex pipiens were identified by analysis of the CQ11 microsatellite locus. Results showed that all sample points comprised of Culex pipiens s.s., and seven points contained Culex torrentium. Further, we determined that 22 haplotypes from five haplogroups were identified within the Ace-2 marker, and three haplotypes were contained within the CQ11 …

Discrimination Of The Sister Hedgehog Species Erinaceus Concolor And E. Roumanicus(Erinaceomorpha: Mammalia): A Geometric Morphometric Approach, Sadik Demi̇rtaş, İslam Gündüz, Jeremy S. Herman

Turkish Journal of Zoology

This study investigates skull variation between the two closely related hedgehog species, Erinaceus concolor and E. roumanicus by using geometric morphometric analyses based on 2-dimensional landmarks. For this purpose, a total of 68 specimens were evaluated: 54 E. concolor and 14 E. roumanicus. The results of PCA, ANOVA and MANOVA analyses showed significant shape differences between the species, especially for the dorsal cranium. Shape differences were most prominent on the neurocranium and viscerocranium regions of the dorsal surface of the cranium and in mandibular ramus and the premolar regions. DFA tests were statistically significant against the null hypothesis of equal …

Autophagic Chemicals Effect To Atg8 And Rice Stripe Virus Relative Expressions, And Wolbachia Relative Density In Laodelphax Striatellus (Hemiptera: Delphacidae), Achmad Gazali, Ardhiani Hidayanti, Yohsuke Tagami

Turkish Journal of Zoology

Laodelphax striatellus is one of the most important pest insects and vectors of rice stripe virus (RSV), which causes rice stripe disease (RSD) in rice plants. L. striatellus is infected by Wolbachia. RSV and Wolbachia may be regulated by a cell defense mechanism within insect cells called autophagy. We utilized autophagic chemicals to predict the relationships between Atg8 (an importance of autophagy-related genes), Wolbachia, and RSV within L. striatellus. The relative expressions and density level of Atg8, RSV, and Wolbachia were determined by three autophagy inducers and two inhibitors. We examined the effect of chemicals on the host. We report …

Evaluation Of The Feeding Patterns Of Important Mosquito Vector Species Using Molecular Techniques, Fatma Bursali, Fati̇h Mehmet Şi̇mşek

Turkish Journal of Zoology

This study investigated the feeding patterns of populations of Anopheles sacharovi, Culex tritaeniorhynchus, and Culex pipiens in the Mediterranean and Aegean regions of Turkey. Blood-fed females resting inside barns, houses, and chicken coops in the rural areas were collected between May 2017 and September 2019, and the genomic DNA from each female was isolated to determine the blood source after amplification of the mitochondrial cytochrome b gene region. Cytb results showed that out of 445 blood-fed An. sacharovi females 2 blood-fed from dogs, 9 from birds, and 434 from cows. The results also showed that all 216 blood-fed females Cx. …

Effects Of In Vivo Exposures To Nanoparticles (Al2O3, Cuo, Tio2) On The Activities Of Atpases In The Gill And Muscle Of Freshwater Mussel (Unio Tigridis), Esi̇n Gülnaz Canli, Mustafa Canli

Turkish Journal of Zoology

Mussels are effective bioindicator organisms for aquatic environments. Therefore, they were often used to determine the effects of various xenobiotics in the aquatic systems. There is no study to our knowledge on the in vivo effects of nanoparticles (NPs) on the activities of ATPases in freshwater mussels (Unio tigridis). This work demonstrates the effects of Al₂O₃, CuO, and TiO₂ NPs on Na- ATPase, Ca-ATPase, and Mg-ATPase activities in the gill and muscle of mussels following 14-day exposures to different concentrations of NPs (0, 1, 3, 9 mg/L). Mussels were fed with laboratory cultured algae (Chlorella …

The Web Amount And Quality Of Web Spiders (Agelenidae, Pholcidae), Agelena Labyrinthica (Clerck, 1757) And Holocnemus Pluchei (Scopoli, 1763), Depending On Food And Temperature, Bayda Hameed, Adi̇le Akpinar, Derya İşler Ceyhan

Turkish Journal of Zoology

The web amount and quality of web-weaving of two spider species, Agelena labyrinthica (Clerck, 1757) and Holocnemus pluchei (Scopoli, 1763), were determined depending on the temperature and the amount of food consumed. Two different experiments were set up in the study. In the first one, the spiders were raised at different temperatures (20-25 °C and 25-30 °C) under laboratory conditions and they were fed with 10 Drosophila melanogaster (Diptera: Drosophilidae) each time. In the second one, the spiders were fed with 7-10 insects caught from their natural habitats, at 20-25 °C and 25-30 °C. According to this, the difference in …

The Effect Of Ontogenetic Diet Shifts On Sagittal Otolith Shape Of European Perch, Perca Fluviatilis (Actinopterygii: Percidae) From Lake Ladik, Turkey, Oğuz Çöl, Savaş Yilmaz

Turkish Journal of Zoology

European perch undergoes several ontogenetic dietary shifts during its lifetime. The present study focused on the variability in otolith shape caused by ontogenetic dietary changes in this species. A total of 172 specimens (7.5 to 27.5 cm TL) were caught by local fishermen in Lake Ladik from April to November 2019. Shape indices (SIs) and elliptic Fourier coefficients (EFCs) were calculated for each otolith. To detect ontogenetic changes in otolith shape, SIs and EFCs were compared among the three defined size classes (I, II, and III). Size-related groups were distinguished by both SIs and EFCs. Otolith shape analysis was more …

The Microplastic Pattern In Turkish Lakes: Sediment And Bivalve Samples From Çıldır Lake, Almus Dam Lake, And Kartalkaya Dam Lake, Kenan Gedi̇k, Şebnem Atasaral

Turkish Journal of Zoology

Plastic has become one of the most prominent contaminants in recent decades, posing a major environmental threat with critical implications for seafood safety. Thus, we investigated the abundance and characterization of the microplastics (MPs) in the sediment and bivalves from Çıldır Lake, Almus Dam Lake, and Kartalkaya Dam Lake in Turkey. The abundance of the MPs ranged from 19-156 MP kg$^{-1}$ in the sediments, while 0.75-10.0 MP individual$^{-1}$ (indiv.$^{-1}$) in Anodonta sp., 0.16-1.00 MP indiv.$^{-1}$ in Dreissena polymorpha, 0.50-2.50 indiv.$^{-1}$ in the Unio damescensis was detected. ATR-FTIR was used to identify four distinct polymer types, with polyethylene terephthalate being the …

Contributions On The Southern Distribution Of Vespertilio Murinus Linnaeus, 1758 (Chiroptera: Vespertilionidae) From Türkiye, Ahmet Karataş, Şafak Bulut, Abdurrahman Sefali, Ferhat Toprak, Mehmet Kürşat Şahi̇n, Şaki̇r Önder Özkurt

Turkish Journal of Zoology

Vespertilio murinus Linnaeus, 1758, has a wide distribution from France to Japan, and from Iran in the south to Scandinavia and Russia in the north. The only records of the parti-coloured bat, Vespertilio murinus known from Turkey so far were based on subfossils, remains from owl pellets, and ultrasound recordings. We present the first records of live individuals from two Turkish provinces, Ardahan and Bayburt. Additionally, based on echolocation call records, its known distribution in the Anatolian Peninsula was proved to be wider. The global distribution of the species has been mapped by using ecological niche modelling. The results revealed …

Effects Of Nitrogen Fertilizer On Capoeta Capoeta: An Immunohistopathological And Biochemical Investigation, Seda Vural Aydin, Hasan Özen, Muhi̇tdi̇n Yilmaz

Turkish Journal of Zoology

Increased use of fertilizers to increase plant production causes important environmental pollution not only in soil but also in water resources. Soil structure, water quality, water systems, and biodiversity are adversely affected by the unconscious use of fertilizers. In this study, Capoeta capoeta (Guldenstaedt 1773) were used to investigate the degenerative effects of nitrogen fertilizer. Twentyfour fish were equally allocated into three groups; group 1 (control), group 2 (15 mg/L nitrogen fertilizer in water) and group 3 (15 mg/L nitrogen fertilizer in water). Fish were exposed to the fertilizer for 15 days and then the tissues of gill, liver and …