Search

We evaluated relationships between climatological variables and abundance of larval yellow perch (Perca flavescens) in eastern South Dakota glacial lakes. Age-0 yellow perch were collected using a 0.75 m diameter ichthyoplankton net from May through mid-June at 7 to 10 d intervals. Highest correlation coefficients with larval yellow perch abundance were for April total precipitation (r=0.95-0.99; P=0.09- 0.01; three lakes), mean March wind speed (r=-0.98 to -0.99; P=0.02-0.006; two lakes), mean of May average daily temperatures (r=0.78; P=0.12; one lake) and mean May wind speed (r=-0.82; P=0.02; one lake). Given the low number of years in some samples, individual years at times had undue influence on the relationship, resulting in high correlation coefficients. Multiple regression modeling resulted in improved models for only two of the seven lakes (R²=0.90-0.98; P=0.05-0.02). However, March through May weather patterns in some combination were related to larval yellow perch abundance in all seven study lakes. Larval abundance tended to be higher in years with less wind, more precipitation, and warmer air temperatures. Whether wind, temperature, or precipitation were most influential seemed to vary by lake. [ABSTRACT FROM AUTHOR]

Presents a study that analyzed the relationships between alewives population characteristics and physiochemical lake variables in lakes in Connecticut. Assessment of the characteristics of alewife populations; Analysis of the growth rates of alewives; Correlation between alewife growth rate and lake depth.

The article provides information on writing new national standards in legitimizing dodgeball as a physical education curriculum in the U.S. It is necessary to read and study the existing six national standards for physical education (NASPE), before proceeding in making changes. Then, the components of dodgeball should be assessed to find out its direct contribution to the NASPE. Dodgeball, which includes throwing balls at human targets to eliminate them from play is thought to likely entail skilled students to dominate, hurt, humiliate, embarrass, upset, degrade and overpower lesser skilled students. Thus, a new standard specific to dodgeball was created to address this concern.

Specialty care contributes significantly to total medical expenditures, for which accountable care organizations (ACOs) are responsible. ACOs have sought to replace costly in-person visits with lower-cost alternatives such as virtual visits (videoconferencing with physicians). In fee-for-service environments, virtual visits appear to add to in-person visits instead of replacing them. While this may be less of a problem within ACOs, whether virtual visits reduce in-person visits in an ACO is not known. Using data from over 35,000 patients in the period 2014-17 within a Massachusetts-based ACO, we found that the use of virtual visits reduced in-person visits by 33 percent but increased total visits (virtual plus in-person visits) by 80 percent over 1.5 years. While the use of virtual visits reduced in-person visits soon after registering with the program, the effect did not endure beyond a year. Whether and how virtual visits can substitute for in-person care in the long term are open questions.