Determination of hematology and plasma chemistry reference intervals for 3 populations of captive Atlantic sturgeon (Acipenser oxyrinchus oxyrinchus)     

Mark A. Matsche  Jill Arnold  Erin Jenkins  Howard Townsend  Kevin Rosemary 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》2014,43(3):387-396

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CPR in the Neonatal Foal : Has RECOVER Changed Our Approach?     

Jonna Maaria Jokisalo  Kevin Thomas Trent Corley 《Veterinary Clinics of North America: Equine Practice》2014

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A synthesis of the life history and ecology of juvenile Pacific herring in Prince William Sound,Alaska     

Brenda L. Norcross  Evelyn D. Brown  Robert J. Foy  Michele Frandsen  Shelton M. Gay  Thomas C. Kline  Doran M. Mason  E. Vincent Patrick  A. J. Paul  Kevin D. E. Stokesbury 《Fisheries Oceanography》2001,10(Z1):42-57

Physical and biological variables affecting juvenile Pacific herring (Clupea pallasi) in Prince William Sound (PWS) from 1995 to 1998 were investigated as part of a multifaceted study of recruitment, the Sound Ecosystem Assessment (SEA) program. Though more herring larvae were retained in eastern PWS bays, ages‐0 and ‐1 herring used bays throughout PWS as nursery areas. Water transported into PWS from the Gulf of Alaska (GOA) contributed oceanic prey species to neritic habitats. Consequently, variations in local food availability resulted in different diets and growth rates of herring among bays. Summer food availability and possible interspecific competition for food in nursery areas affected the autumn nutritional status and juvenile whole body energy content (WBEC), which differed among bays. The WBEC of age‐0 herring in autumn was related to over‐winter survival. The limited amount of food consumption in winter was not sufficient to meet metabolic needs. The smallest age‐0 fish were most at risk of starvation in winter. Autumn WBEC of herring and winter water temperature were used to model over‐winter mortality of age‐0 herring. Differences in feeding and energetics among nursery areas indicated that habitat quality and age‐0 survival were varied among areas and years. These conditions were measured by temperature, zooplankton abundance, size of juvenile herring, diet energy, energy source (GOA vs. neritic zooplankton), WBEC, and within‐bay competition.  相似文献   

COMPUTED TOMOGRAPHY OF BALL PYTHONS (Python regius) IN CURLED RECUMBENCY     

Joanna Hedley  Kevin Eatwell  Tobias Schwarz 《Veterinary radiology & ultrasound》2014,55(4):380-386

Anesthesia and tube restraint methods are often required for computed tomography (CT) of snakes due to their natural tendency to curl up. However, these restraint methods may cause animal stress. The aim of this study was to determine whether the CT appearance of the lungs differs for ball pythons in a curled position vs. tube restraint. Whole body CT was performed on ten clinically healthy ball pythons, first in curled and then in straight positions restrained in a tube. Curved multiplanar reformatted (MPR) lung images from curled position scans were compared with standard MPR lung images from straight position scans. Lung attenuation and thickness were measured at three locations for each scan. Time for positioning and scanning was 12 ± 5 min shorter for curled snakes compared to tube restraint. Lung parenchyma thickness and attenuation declined from cranial to caudal on both straight and curled position images. Mean lung parenchyma thickness was greater in curled images at locations 1 (P = 0.048) and 3 (P = 0.044). Mean lung parenchyma thickness decreased between location 1 and 2 by 86–87% (straight: curled) and between location 1 and 3 by 51‐50% (straight: curled). Mean lung attenuation at location 1 was significantly greater on curled position images than tube restraint images (P = 0.043). Findings indicated that CT evaluation of the lungs is feasible for ball pythons positioned in curled recumbency if curved MPR is available. However, lung parenchyma thickness and attenuation in some locations may vary from those acquired using tube restraint.  相似文献   

Reference intervals and age‐related changes for venous biochemical,hematological, electrolytic,and blood gas variables using a point of care analyzer in 68 puppies     

Mauria A. O'Brien DVM  DACVECC  Maureen A. McMichael DVM  DACVECC  Kevin Le Boedec DVM  MS  George Lees DVM  MS  DACVIM 《Journal of Veterinary Emergency and Critical Care》2014,24(3):291-301

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Social learning in fishes: a review   总被引：14，自引：0，他引：14  

Culum Brown  & Kevin N Laland 《Fish and Fisheries》2003,4(3):280-288

Animals acquire skills and knowledge from other animals, and fish are no exception. There is now strong experimental evidence that many species of fish exhibit social learning and traditional behaviours. Here, we review the literature pertaining to social learning in fish, focusing on (i) antipredator behaviour, (ii) migration and orientation, (iii) foraging, (iv) mate choice and (v) eavesdropping.  相似文献   

Accuracy of a machine-vision pellet detection system     

Kevin D. Parsonage  Royann J. Petrell   《Aquacultural Engineering》2003,29(3-4):109-123

Video cameras are employed on net pen fish farms for monitoring food pellet levels near the cage bottom. Herein, the accuracy of a new machine-vision system for the identification of a feed-wastage event and its response time are reported. Research involved novel tests and definitions, video footage recorded under different stocking and environmental conditions, and numerical filters to reduce the effects of misclassifications and patchiness of the pellet wastage record on overall system accuracy. Single-frame food pellet detection accuracy was based on the difference between computer-generated and actual frame counts of pellets greater than 30 pixels in size. A pellet wastage event was defined as a median of three or more visible pellets per frame. During tests on still video frames from different feeding events, the system missed 0.1±0.1 to 1.3±0.4 pellets frame⁻¹, and miss-classified as pellets 0±0.1 to 2.3±0.5 objects frame⁻¹ (n=264). Most missed pellet images were on top of fish images. Waste matter accounted for 65% of the misclassifications, while particles associated with poor camera maintenance accounted for approximately 24%. The average response time to a pellet wastage event was 5.1 and 11.4 s for sampling rates of 2 frames s⁻¹ and 0.5 frames s⁻¹, respectively (n=20 different pellet wastage events). The longest response time (26 s) occurred when fish were amassed against the camera and/or covering pellets. Using appropriate camera lens, camera positioning and/or ‘warning’ software can address fish-interference problems.  相似文献   

Ecology and management of invasive riverside plants,edited by Louise C. de Waal,Lois E. Child,P. Max Wade and John H. Brock. John Wiley,Chichester, 1994. ISBN 0 471 94257 X. £45.00 hb     

Kevin Murphy 《水产资源保护:海洋与淡水生态系统》1995,5(2):170-171

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Machine learning highlights the importance of primary and secondary production in determining habitat for marine fish and macroinvertebrates     

Kevin D. Friedland  Michelle Bachman  Andrew Davies  Romain Frelat  M. Conor McManus  Ryan Morse  Bradley A. Pickens  Szymon Smoliński  Kisei Tanaka 《水产资源保护:海洋与淡水生态系统》2021,31(6):1482-1498

1. Species distribution models for marine organisms are increasingly used for a range of applications, including spatial planning, conservation, and fisheries management. These models have been constructed using a variety of mathematical forms and drawing on both physical and biological independent variables; however, what might be called first-generation models have mainly followed the form of linear models, or smoothing splines, informed by data collected in the context of fish surveys.
2. The performance of different classes of variables were tested in a series of species occurrence models built with machine learning methods, specifically evaluating the potential contribution of lower trophic level data. Random forest models were fitted based on the classification of the absence/presence for fish and macroinvertebrates surveyed on the US Northeast Continental Shelf.
3. The potential variables included physical, primary production, secondary production, and terrain variables. For accepted model fits, six variable importance measures were computed, which collectively showed that physical and secondary production variables make the greatest contribution across all models. In contrast, terrain variables made the least contribution to these models.
4. Multivariable analyses that account for all performance measures reinforce the role of water depth and temperature in defining species presence and absence; however, chlorophyll concentration and some specific zooplankton taxa, such as Metridia lucens and Paracalanus parvus, also make important contributions with strong seasonal variations.
5. Our results suggest that lower trophic level variables, if available, are valuable in the creation of species distribution models for marine organisms.

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Of Fish and Men. Tales of a Scottish Fisher. By D.C. Watson. Cualann Press, Dunfermline. Pp. 160. UK£ £10.99 (pbk). ISBN 0-9535036-3-1.     

Kevin O' Grady 《Fisheries Management and Ecology》2001,8(2):187-188

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