Restricted movement of prairie fishes in fragmented riverscapes risks ecosystem structure being ratcheted downstream     

David A. Schumann  Jenna M. Haag  Paige C. Ellensohn  Jordon D. Redmond  Katie N.B. Graeb 《水产资源保护:海洋与淡水生态系统》2019,29(2):235-244

Epidemiology of Polypodium hydriforme in American Paddlefish     

Beth Okamura  Ashlie Hartigan  Paul F. Long  Paolo Ruggeri  Katie Smith-Easter  Jason D. Schooley 《Journal of fish diseases》2020,43(9):979-989

Polypodium hydriforme is a parasitic cnidarian that develops within the eggs of acipenseriform fish in the Old and New Worlds. Currently regarded as monotypic, P. hydriforme has been studied largely in the context of caviar production in Russian sturgeon species. We report the first robust epidemiological study of P. hydriforme in North American acipenseriform fish. We sampled infection prevalences (in 2017 and 2018) and intensities (in 2017) during annual surveys of American Paddlefish, Polyodon spathula, caught during spawning migration in north-eastern Oklahoma. Egg masses were characterized for the presence and intensity of P. hydriforme infection. Prevalences were similar in 2017 and 2018 (49% and 45%, respectively). Generally, a small number of eggs were infected per egg mass, but a few were heavily infected. Longer, heavier and older fish are more likely to be infected and to harbour more severe infections. In addition, infection is linked to decreases in roe fat weight independently of fish length, weight, age or roe weight. Infection thus diminishes Paddlefish energy reserves (roe fat) which could in turn impact host fitness. Our results raise questions about the impacts of infection on caviar production and Paddlefish conservation and suggest insights on infection dynamics and parasite strategies.  相似文献   

Long-duration transit and food and water deprivation alter behavioral activities and aggressive interactions at the feed bunk in beef feedlot steers     

Katie J Heiderscheit  Alyssa D Freestone  Aubree M Beenken  Erin L Deters  Joshua M Peschel  Stephanie L Hansen 《Journal of animal science》2022,100(3)

The objective of these experiments was to assess the effects of food and water deprivation and transit duration on the behavior of beef feedlot steers. In Experiment 1, 36 Angus-cross steers (353 ± 10 kg) were stratified to 6 pens and assigned one of three treatments (n = 12 steers per treatment): control (CON; stayed in home pens with ad libitum access to feed and water), deprived (DEPR; stayed in home pens but deprived of feed and water for 18 h), or transported (TRANS; subjected to 18-h transit event and returned to home pens). In Experiment 2, 60 Angus-cross steers (398 ± 5 kg; 6 steers per pen) were transported either 8 (8H) or 18 (18H) h. Four 8H pens (n = 24 steers) and six 18H pens (n = 36 steers) were used for behavioral analysis. In both experiments, the time to eat, drink, and lay down was recorded for each steer upon return to home pens. Total pen displacements from the feed bunk were also assessed for the 2 h following feed access in both experiments. Data were analyzed using Proc Mixed of SAS 9.4, with treatment as a fixed effect. Steer was the experimental unit for behavioral activities, while pen was the experimental unit for bunk displacements. Displacements were analyzed as repeated measures with the repeated variable of time. In Experiment 1, the time to eat and drink was similar across treatments (P ≥ 0.17). However, TRANS laid down in 16.5 min while DEPR did not lay down until 70.5 min post-arrival to pen (P < 0.01). Deprived steers had greater bunk displacements in the first 70 min post-feed access than CON or TRANS, though displacements among treatments from 100 to 120 min post-feed access were similar (treatment × time: P = 0.02). In Experiment 2, both 8H and 18H steers laid down approximately 25 min post-home pen arrival (P = 0.14). There was no effect of transit duration or duration by time on bunk displacements (P ≥ 0.20), though displacements were greater from 0 to 20 min than from 20 to 30 min post-feed access (time: P = 0.04). Steers that were deprived of feed and water were highly motivated to access those resources, while transported steers prioritized laying down. Producers should consider these priorities when preparing to receive cattle from a long transit event.  相似文献   

SSR marker development,genetic diversity and population structure analysis of Bambara groundnut [Vigna subterranea (L.) Verdc.] landraces     

Odireleng O. Molosiwa  Siise Aliyu  Florian Stadler  Katie Mayes  Festo Massawe  Andrzej Kilian  Sean Mayes 《Genetic Resources and Crop Evolution》2015,62(8):1225-1243

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Cats contract avian influenza virus   总被引：1，自引：0，他引：1  

Burns K 《Journal of the American Veterinary Medical Association》2006,228(8):1165-1166

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Research targets conditions of older cats and dogs     

Burns K 《Journal of the American Veterinary Medical Association》2006,229(4):482-483

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Washing away your sins: threatened morality and physical cleansing     

Zhong CB  Liljenquist K 《Science (New York, N.Y.)》2006,313(5792):1451-1452

Physical cleansing has been a focal element in religious ceremonies for thousands of years. The prevalence of this practice suggests a psychological association between bodily purity and moral purity. In three studies, we explored what we call the "Macbeth effect"-that is, a threat to one's moral purity induces the need to cleanse oneself. This effect revealed itself through an increased mental accessibility of cleansing-related concepts, a greater desire for cleansing products, and a greater likelihood of taking antiseptic wipes. Furthermore, we showed that physical cleansing alleviates the upsetting consequences of unethical behavior and reduces threats to one's moral self-image. Daily hygiene routines such as washing hands, as simple and benign as they might seem, can deliver a powerful antidote to threatened morality, enabling people to truly wash away their sins.  相似文献   

Clinical relevance of novel Otarine herpesvirus-3 in California sea lions (Zalophus californianus): lymphoma,esophageal ulcers,and strandings     

Stephanie Venn-Watson  Celeste Benham  Frances M Gulland  Cynthia R Smith  Judy St Leger  Pam Yochem  Hendrik Nollens  Uriel Blas-Machado  Jeremiah Saliki  Katie Colegrove  James FX Wellehan  Jr  Rebecca Rivera 《Veterinary research》2012,43(1):85

Herpesviruses have been recognized in marine mammals, but their clinical relevance is not always easy to assess. A novel otarine herpesvirus-3 (OtHV3) was detected in a geriatric California sea lion (Zalophus californianus), and using a newly developed quantitative PCR assay paired with histology, OtHV3 was associated with esophageal ulcers and B cell lymphoblastic lymphoma in this animal. The prevalence and quantities of OtHV3 were then determined among buffy coats from 87 stranded and managed collection sea lions. Stranded sea lions had a higher prevalence of OtHV3 compared to managed collection sea lions (34.9% versus 12.5%; p = 0.04), and among the stranded sea lions, yearlings were most likely to be positive. Future epidemiological studies comparing the presence and viral loads of OtHV3 among a larger population of California sea lions with and without lymphoid neoplasia or esophageal ulcers would help elucidate the relevance of OtHV3-associated pathologies to these groups.  相似文献   

Sessions address common behavioral problems     

Burns K 《Journal of the American Veterinary Medical Association》2012,240(6):643

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Laser guidelines encompass veterinarians     

Burns K 《Journal of the American Veterinary Medical Association》2012,240(7):787

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