Macroinfauna of Northern New England marine sand. IV. Infaunal ecology of Amphiporeia virginiana Shoemaker, 1933 (Crustacea: Amphipoda)

1979 ◽  
Vol 57 (8) ◽  
pp. 1511-1519 ◽  
Author(s):  
Richard P. Hager ◽  
Robert A. Croker
Keyword(s):  
South Carolina ◽  
New England ◽  
Late Summer ◽  
Fine Sand ◽  
High Energy ◽  
Breeding Period ◽  
Population Fluctuations ◽  
Marine Sand ◽  
Annual Population ◽  
Early Fall

Amphiporeia virginiana occurs from Nova Scotia to South Carolina where it is a dominant inhabitant of high energy sand beaches. Maximum abundance occurs on the lower foreshore in fine sand particularly during summer months. Within-habitat segregation of sexes occurs, with females more abundant at higher beach levels; ovigerous females are confined to higher levels only. Annual population fluctuations of up to 14-fold on a geometric basis are related to life history events and sedimentary changes. Breeding occurs during most of the year with peak recruitment during June and late summer to early fall, yielding summer and overwintering generations. Precopulating animals are commonly seen swimming, with two males per female occasionally evident. Females produce a mean of 6–11 eggs during the year and have one brood per breeding period. The species is a detritivore and generally inhabits the upper 2.5 cm of sand. It is most tolerant of salinities in the range of 25–35‰; mortality increases rapidly in salinities less than 20‰, and in sediments containing less than 11% water by weight exposed to temperatures simulating hot summer days.

Macroinfauna of northern New England marine sand. III. The ecology of Psammonyx nobilis (Stimpson), 1853 (Crustacea: Amphipoda)

1976 ◽  
Vol 54 (9) ◽  
pp. 1519-1529 ◽  
Author(s):  
K. J. Scott ◽  
R. A. Croker
Keyword(s):  
New England ◽  
Fine Sand ◽  
Early Spring ◽  
Breeding Period ◽  
Sexually Dimorphic ◽  
Organic Debris ◽  
Marine Sand ◽  
Shallow Subtidal ◽  
Northern New England ◽  
Intertidal Habitats

The boreal lysianassid Psammonyx nobilis is associated with very well sorted, fine sand of low intertidal and shallow subtidal habitats. It is a winter to early spring breeder, with recruitment from June to August in New England. Females produce up to 50 eggs and have one brood per breeding period. Generation time is 2 years. Larger adults occur only during colder months at more exposed intertidal habitats, while all life stages occur at sheltered intertidal habitats throughout the year. Females are larger than males and are more abundant at the landward periphery of intertidal populations. Subtidal populations show smaller adults and juveniles present most of the year. The species is a scavenger–omnivore exhibiting an aggregated pattern of distribution. Swimming activity is highest in the dark during falling tides. Respiration increases significantly at salinities < 20‰. The length of pereopod 7 was the sole sexually dimorphic character observed. The heretofore enigmatic, elongate gnathopod 2 is not used in precopula, but for removing organic debris from the thoracic cavity.

Macroinfauna of northern New England marine sand. I. The biology of Mancocuma stellifera Zimmer, 1943 (Crustacea: Cumacea)

1973 ◽  
Vol 51 (10) ◽  
pp. 1011-1020 ◽  
Author(s):  
W. T. Gnewuch ◽  
R. A. Croker
Keyword(s):  
New England ◽  
New Hampshire ◽  
Life Stage ◽  
Copulatory Behavior ◽  
Seasonal Distribution ◽  
Distribution Data ◽  
Marine Sand ◽  
Two Generations ◽  
Early Fall ◽  
Northern New England

Mancocuma stellifera is found in nearshore subtidal sands from the Gulf of St. Lawrence south to Cape Ann. Massachusetts, with abundance as high as 4000/0.1 m2 in coastal New Hampshire habitats. The species has two generations yearly, with maximum recruitment during June and early fall. Pre-copulatory behavior with opposed orientation of the sexes is unique for the Cumacea. Seasonal distribution data from New Hampshire and Maine to a depth of 7 m below MLW level showed over 90% of the population shallower than the 4-m depth, and abundance maxima at 1–2 m. Manca stages and older juveniles made up most of the population at 5- to 7-m depths during summer months, with manca stages the predominant life stage in night surf plankton tows during peak recruitment. SCUBA and laboratory observations indicated that the species burrows in superficial sand where it is an epistrate and detritus feeder.

scholarly journals Decrease in Enteroviral Meningitis - An Unexpected Benefit of COVID-19 Mitigation?

2020 ◽  
Author(s):  
Kami D Kies ◽  
Amber S Thomas ◽  
Matthew J Binnicker ◽  
Kelli L Bashynski ◽  
Robin Patel
Keyword(s):  
Cerebrospinal Fluid ◽  
Laboratory Testing ◽  
Clinical Microbiology ◽  
Late Summer ◽  
Mitigation Strategies ◽  
Clinical Microbiology Laboratory ◽  
Microbiology Laboratory ◽  
Testing Data ◽  
Early Fall ◽  
Enteroviral Meningitis

Abstract Enteroviral meningitis is seasonal, typically exhibiting a rise in prevalence in late summer/early fall. Based on clinical microbiology laboratory testing data of cerebrospinal fluid, the expected August/September/October peak in enteroviral meningitis did not occur in 2020, possibly related to COVID-19 mitigation strategies.

PUBLIC HEALTH, NURSING AND MEDICAL SOCIAL WORK

PEDIATRICS ◽  
1948 ◽  
Vol 2 (1) ◽  
pp. 138-140
Keyword(s):  
Public Health ◽  
South Carolina ◽  
New England ◽  
The West ◽  
Central Section ◽  
North Central ◽  
South Central ◽  
High Incidence ◽  
Health Nursing ◽  
West North Central

THE accompanying table summarizes the incidence of nine important communicable diseases, based on weekly telegraphic reports from State health departments. The reports from each State for each week are published in PUBLIC HEALTH REPORTS under the section "Incidence of Disease." [See Table in Source Pdf]. Diseases Above Median Incidence Measles—The number of cases of measles rose from 102,680 during the preceding 4 weeks to 114,983 during the 4 weeks ended May 22. The incidence was 3.4 times the number of cases reported for the corresponding period in 1947, which was, however, a comparatively low measles year, but it was only about 10 percent above the 1943-47 median. In the New England and East South Central sections the incidence was below the normal expectancy and in the South Atlantic section the number of cases was only slightly higher than the median for the preceding 5 years, but in the other 6 sections the increases over the median expectancy ranged from 1.1 times the median in the West North Central section to 3.4 times the median in the West South Central section. Poliomyelitis.— The number of cases of poliomyelitis rose from 126 during the preceding 4-week period to 440 during the current 4 weeks. The incidence was 3.5 times that reported for these weeks in 1947, which number (126 cases) also represents the 1943-47 median. An increase of this disease is expected at this season of the year, but the current number of cases represents a larger increase at this time than has normally occurred in preceding years. While each section of the country except New England contributed to the relatively high incidence, the greatest excesses over the 5-year medians were reported from the West North Central and West South Central sections. Of the total cases Texas reported 179, California 62, South Carolina 46, New Jersey 16, Iowa 14, Florida 12, Alabama 11, and Illinois, South Dakota, and Louisiana 10 each; 85 percent of the reported cases occurred in those 10 states which represent every section of the country except the New England and Mountain sections. Since the beginning of the year there have been 947 cases of poliomyelitis reported as compared with 894 and 810 for the corresponding period in 1947 and 1946, respectively.

RESPONSE OF THREE WARM-SEASON GRASSES TO VARYING FERTILITY LEVELS ON FIVE SOILS

1982 ◽  
Vol 62 (3) ◽  
pp. 657-665 ◽  
Author(s):  
R. W. TAYLOR ◽  
D. W. ALLINSON
Keyword(s):  
New England ◽  
Panicum Virgatum ◽  
Warm Season ◽  
Late Summer ◽  
Control Treatment ◽  
Yield Response ◽  
Limiting Factor ◽  
Big Bluestem ◽  
P Fertilization ◽  
Warm Season Grasses

Animal production in New England has been limited by inadequate forage during mid- to late summer when cool-season grasses are in summer dormancy. Big bluestem (Andropogon gerardi Vitman), indiangrass [Sorghastrum nutans (L.) Nash] and switchgrass (Panicum virgatum L.) are warm-season grasses that may be a perennial source of summer forage. Since production of these warm-season grasses would be limited to the less fertile soils of the region, a greenhouse study was conducted to examine the growth and quality of these species in five acid, infertile soils as well as fertilizer-amended soils. The soils were fertilized with limestone (L), limestone plus nitrogen (LN), limestone, nitrogen plus phosphorus (LNP), and limestone, nitrogen, phosphorus plus potassium (LNPK). Limestone was applied to adjust soils to a pH of 6.5. Fertilizer was applied at rates of 45, 117 and 111 kg/ha of N, P and K, respectively. First harvest yields were greatest for switchgrass and big bluestem, but indiangrass produced significantly greater yields than either of the other grasses in the second harvest. In both harvests, the yields of all grasses were greatest under the LNP and LNPK fertility regimes. Nitrogen, without P, did not significantly increase yields above the control treatment in the first harvest. Yield responses to P fertilization varied with soils. Although P appeared to be the limiting factor insofar as growth was concerned, the yield response from P fertilization would probably be limited without N fertilization. Indiangrass was significantly higher in crude protein and K concentration and significantly lower in Ca concentration than big bluestem and switchgrass. Phosphorus concentrations were below the recommended levels for ruminant nutrition.

scholarly journals A biodiversity hotspot for Microgastrinae (Hymenoptera, Braconidae) in North America: annotated species checklist for Ottawa, Canada

ZooKeys ◽  
2016 ◽  
Vol 633 ◽  
pp. 1-93 ◽  
Author(s):  
Jose Fernandez-Triana ◽  
Caroline Boudreault ◽  
Joel Buffam ◽  
Ronald Maclean
Keyword(s):  
North America ◽  
General Pattern ◽  
Late Summer ◽  
The United States ◽  
Early Summer ◽  
Individual Species ◽  
Early Fall ◽  
Two Peaks ◽  
Annotated Checklist ◽  
First Time

Microgastrinae wasps (Hymenoptera, Braconidae) from the city of Ottawa and its surroundings (a 50-km radius circle, ~7,800 km2) were studied based on 1,928 specimens collected between 1894 and 2010, and housed in the Canadian National Collection of Insects. A total of 158 species from 21 genera were identified, which is by far the highest number of species ever recorded for a locality in North America. An annotated checklist of species is provided.Choerasparasitellae(Bouché, 1834) andPholetesornanus(Reinhard, 1880) are recorded for the first time in the Nearctic (previously only known from the Palearctic region),Cotesiadepressa(Viereck, 1912) is recorded for the first time in Canada (previously only known from the United States), andCotesiahemileucae(Riley, 1881) andProtapantelesphlyctaeniae(Muesebeck, 1929) are recorded for the first time in the province of Ontario. In Ottawa the most diverse genera areCotesia,Apanteles,Microplitis,Pholetesor,Microgaster, andDolichogenidea, altogether comprising 77% of the species found in the area. A total of 73 species (46%) were represented by only one or two specimens, suggesting that the inventory for Ottawa is still relatively incomplete. Seasonal distribution showed several peaks of activity, in spring, summer, and early fall. That general pattern varied for individual species, with some showing a single peak of abundance either in the summer or towards the end of the season, others species attaining two peaks, in late spring and late summer, or in early summer and early fall, and yet others attaining up to three different peaks, in spring, summer and fall. At least 72 of the Microgastrinae species from Ottawa have been previously associated with 554 species of Lepidoptera as hosts – but those historical literature records are not always reliable and in many cases are based on data from areas beyond Ottawa. Thus, our knowledge of the associations between the 158 species of microgastrine parasitoids and the caterpillars of the 2,064 species of Lepidoptera recorded from Ottawa is still very incomplete.

scholarly journals Changes in historical typhoid transmission across 16 U.S. cities, 1889-1931: Quantifying the impact of investments in water and sewer infrastructures

2019 ◽  
Author(s):  
Maile T. Phillips ◽  
Katharine A. Owers ◽  
Bryan T. Grenfell ◽  
Virginia E. Pitzer
Keyword(s):  
Late Summer ◽  
Water Source ◽  
Developed Countries ◽  
The United States ◽  
Water And Sanitation ◽  
Sewer Systems ◽  
Early Fall ◽  
Sanitation Systems ◽  
The Impact

ABSTRACTBackgroundInvestments in water and sanitation systems are believed to have led to the decline in typhoid fever in developed countries, such that most cases now occur in regions lacking adequate clean water and sanitation. Exploring seasonal and long-term patterns in historical typhoid mortality in the United States can offer deeper understanding of disease drivers.MethodsWe fit modified Time-series Susceptible-Infectious-Recovered models to city-level weekly mortality counts to estimate seasonal and long-term typhoid transmission. We examined seasonal transmission separately by city and aggregated by water source. We fit regression models to measure associations between long-term transmission and financial investments in water and sewer systems.ResultsTyphoid transmission peaked in late summer/early fall. Seasonality varied by water source, with the greatest variation occurring in cities with reservoirs. Historical $1 per capita ($25.80 in 2017) investments in construction and operation of water and sewer systems were associated with 8-53% decreases in typhoid transmission, while $1 increases in total value or debt accrued to maintain them were associated with 4-7% decreases.ConclusionOur findings aid in the understanding of typhoid transmission dynamics and potential impacts of water and sanitation improvements, and can inform cost-effectiveness analyses of interventions to reduce the typhoid burden.

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