Species Profiles: Life Histories and Environmental Requirements of Coastal Fishes and Invertebrates (Mid-Atlantic): Alewife/Blueback Herring

This profile covers life history and environmental requirements of both alewife (Alosa pseudoharengus) and blueback herring (Alosa aestivalis), since their distribution is overlapping and their morphology, ecological role, and environmental requirements are similar. The alewife is an anadromous species found in riverine, estuarine, and Atlantic coastal habitats, depending on life cycle stage, from Newfoundland (Winters et al. 1973) to Soutn Carolina (Berry 1964). Landlocked populations are i n the Great Lakes, Finger Lakes, and many other freshwater lakes (Bigelow and Sch roeder 1953; Scott and Crossman 1973). The blueback herring is an anadromous species found in riverine, estuarine, and Atlantic coastal habitats, depending on life stage cycle, from Nova Scotia to the St. Johns River, Florida (Hildebrand 1963

Auditory evoked potential audiometry in fish

© The Author(s), 2013. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Reviews in Fish Biology and Fisheries 23 (2013): 317-364, doi:10.1007/s11160-012-9297-z.A recent survey lists more than 100 papers utilizing the auditory evoked potential (AEP) recording technique for studying hearing in fishes. More than 95 % of these AEP-studies were published after Kenyon et al. introduced a non-invasive electrophysiological approach in 1998 allowing rapid evaluation of hearing and repeated testing of animals. First, our review compares AEP hearing thresholds to behaviorally gained thresholds. Second, baseline hearing abilities are described and compared in 111 fish species out of 51 families. Following this, studies investigating the functional significance of various accessory hearing structures (Weberian ossicles, swim bladder, otic bladders) by eliminating these morphological structures in various ways are dealt with. Furthermore, studies on the ontogenetic development of hearing are summarized. The AEP-technique was frequently used to study the effects of high sound/noise levels on hearing in particular by measuring the temporary threshold shifts after exposure to various noise types (white noise, pure tones and anthropogenic noises). In addition, the hearing thresholds were determined in the presence of noise (white, ambient, ship noise) in several studies, a phenomenon termed masking. Various ecological (e.g., temperature, cave dwelling), genetic (e.g., albinism), methodical (e.g., ototoxic drugs, threshold criteria, speaker choice) and behavioral (e.g., dominance, reproductive status) factors potentially influencing hearing were investigated. Finally, the technique was successfully utilized to study acoustic communication by comparing hearing curves with sound spectra either under quiet conditions or in the presence of noise, by analyzing the temporal resolution ability of the auditory system and the detection of temporal, spectral and amplitude characteristics of conspecific vocalizations.Support from the Austrian Science Fund (FWF grant 22319 to F.L.)

The impact of heat on mortality and morbidity in the Greater Metropolitan Sydney Region: A case crossover analysis

Background: This study examined the association between unusually high temperature and daily mortality (1997-2007) and hospital admissions (1997-2010) in the Sydney Greater Metropolitan Region (GMR) to assist in the development of targeted health program

The Ursinus Weekly, March 8, 1948

AVC submits plans to operate radio station on campus • Students vote thumbs down on UMT following debate in chapel on Monday • Visitor to Ukraine will address forum Wednesday evening • ICG leaders announce plans for convention • New members accepted by campus sororities • TKA initiates three members • Experimental group to stage Little foxes here tomorrow • Pre-meds plan dinner dance; Haverford band to supply music • Air force officers to describe aviation cadet and OCS program • Plaudits accorded pianist for recital in Bomberger • Dr. Rice to speak at IRC meeting • Bus-Ad Club to hear talk on salesmanship as career • FTA to hear talk on discipline by C-T High School principal • College men disclose ideas relative to ideal co-ed conduct on week-end dates • Critic reveals reasons for loss in prestige of present day poetry • Three years\u27 Far East service with OSS gives John Brunner rich background • Three new opponents listed on eight game football card for 1948 • Bruin cagers blast Swarthmore, 54-43; Widholm, Bertel again pace offensive • Dickinson quintet tops outclassed bears, 60-41 • Bruins notch fifth league win, whip Haverford \u275\u27, 60-49 • Bearettes edge out Penn sextet, 34-32; Warren scintillates • Bears rout Drexel, 62-47, tie for southern division crown; oppose Swarthmore quintet tomorrow in playoff inaugural • Belles run roughshod over Bryn Mawr, 48-31 • Strong \u27Ford club tops foes on men\u27s \u2748 tennis slate • Temple, Swarthmore beat mermaids as Ellis stars • McCausland leads scorers in intramural league race • PMC downs grapplers 25-10; Turner, Miller rack up victories • Collins only winner as wrestlers are bounced by CCNY, 33-3 • Rutgers, Ursinus split in dual debating meet • Girls\u27 JV still unbeaten; overcome Penn, Bryn Mawr • Speaker at Chem Club meeting • Ursinus grad tells of experience as missionary in Latin America • Dr. A. Rice guest of French Club; shows slides of France and Italyhttps://digitalcommons.ursinus.edu/weekly/1633/thumbnail.jp

Performance of the 19XB 10-Stage Axial-Flow Compressor with Altered Blade Angles

Previous performance data of the 19XB axial-flow compressor indicated that the outlet guide vanes and possibly the inlet guide vanes were stalling. Calculations were made to determine if these adverse conditions could be eliminated and if the manufacturer's design specifications could be more nearly approached by altering the blade angles of the first few compression stages as well as the outlet guide vanes. With the blade angles altered, experimental data were taken at compressor speeds of 8500 to 17,000 rpm with inlet-air conditions of 7.4 inches of mercury absolute and 59 0 F. The temperature-rise efficiency increased with speed from 0.70 at 8500 rpm to 0.74 at 13,600 rpm and dropped gradually to 0.70 at 17,000 rpm. At the design speed of 17,000 rpm, the pressure ratio at the peak efficiency point was 3.63. The maximum pressure ratio at design speed was 4.15 at an equivalent weight flow of 29.8 pounds per second. The altered compressor operated very .near the design specifications of pressure ratio and equivalent weight flow. At the high speeds, the peak adiabatic temperature-rise efficiency was increased 0.02 to 0,06 by altering the blade angles. The peak pressure ratio was increased 0.29 at design speed (17,000 rpm) and 0.05 and 0.13 at 11,900 and 13,600 rpm, respectively. The equivalent weight flow through the altered compressor was reduced 2 pounds per second at 15,300 and 17,000 rpm, as was expected from the design calculations. As extreme caution was taken not to surge the compressor violently, the point of minimum air flow may not have been reached in the present investigation and in a previous investigation. A true comparison of the pressure ratios obtained at the high speeds therefore cannot be made

Multiple impact crashes - consequences for occupant protection measures

Much analysis of accident data and most crash tests focus on single impacts. However, in reality, multiple impacts account for a large proportion of serious injury accidents and are expected to become a larger proportion as countermeasures, developed primarily for single mode impacts, take effect. It is proposed that multiple impacts should be considered separately since consideration of their characteristics may have implications for occupant protection. This study investigates multiple impacts in more detail and, in particular, explores their relative importance in the accident population, analyses their characteristics and discusses some possible consequences for occupant protection measures