NATURAL BREEDING STRUCTURE IN THE BROMUS CARINATUS COMPLEX AS DETERMINED BY POPULATION ANALYSES

Research was held in the estuary of the river Bach Dang (Dongbay community, Rakhtay district, Hai Phong, Vietnam) in June, 2012 - May, 2013. Concentration of lead was studied in water, suspended solids and bottom sediment. Clam beach (natural breeding environment of Meretrix lyrata ) was inspected regularly, every month. Water samples were taken 6 times from the bottom layer 10 cm down the bottom, once per 3 hours in each of 12 investigated zones. Bottom sediment samples were taken at the depth 2 cm. The findings show that lead accumulates mainly in suspended solids (23.3 mg/kg) and in bottom sediment (14.31 mg/kg), in water it is in small quantities (0.003 mg/kg). Analysis of bottom sediment samples taken in different places showed that they have even leadcontent, lead is distributed uniformly, localization of contaminations is not found. The results obtained can be assumed as the basis for investigating lead accumulation and its excretion by clam Meretrix lyrata organisms in the natural habitat.

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Larvae of the blow fly Caiusa testacea (Diptera: Calliphoridae) as egg predators of Polypedates cruciger Blyth, 1852 (Amphibia: Anura: Rhacophoridae)

Journal of Threatened Taxa ◽

10.11609/jott.5740.12.17.17374-17379 ◽

2020 ◽

Vol 12 (17) ◽

pp. 17374-17379

Author(s):

W.G.D. Chathuranga ◽

K. Kariyawasam ◽

Anslem De Silva ◽

W.A.Priyanka P. De Silva

Keyword(s):

Sri Lanka ◽

High Impact ◽

Tree Frog ◽

Blow Fly ◽

Breeding Habitats ◽

The Family ◽

Water Container ◽

The Common ◽

Natural Breeding ◽

The Impact

We investigated the impact of dipteran predators on eggs in foam nests of the Common Hour-glass Tree Frog Polypedates cruciger Blyth, 1852 (Anura: Rhacophoridae) in central Sri Lanka. Foam nests (n=24) of P. cruciger were examined at their natural breeding habitats and infected (n=8) and uninfected spawns (n=16) were identified. Emerging tadpoles were collected in a water container hung under each spawn and the average number of tadpoles (N) hatched from infected spawns (N=0) was compared with that of uninfected spawns (N=354 ± 67). Three severely infected spawns were brought to the laboratory and the fly larvae were reared until they metamorphosed to adults. Morphological and molecular identification of the flies confirmed them as belonging to Caiusa testacea Senior-White, 1923 of the family Calliphoridae. The infected spawns were completely destroyed and an estimated average of 400 P. cruciger eggs per spawn were lost. The results revealed a high impact of Caiusa testacea on egg and embryo mortality of P. cruciger.

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Breeding structure and invasiveness in social insects

Current Opinion in Insect Science ◽

10.1016/j.cois.2021.01.004 ◽

2021 ◽

Vol 46 ◽

pp. 24-30

Author(s):

Pierre-André Eyer ◽

Edward L Vargo

Keyword(s):

Social Insects ◽

Breeding Structure

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Role of postoperative radiotherapy in pT3N0 rectal cancer: A risk‐stratification system based on population analyses

Cancer Medicine ◽

10.1002/cam4.1991 ◽

2019 ◽

Vol 8 (3) ◽

pp. 1024-1033 ◽

Cited By ~ 1

Author(s):

Yun‐xia Huang ◽

Yan‐zong Lin ◽

Jin‐luan Li ◽

Xue‐qing Zhang ◽

Li‐rui Tang ◽

...

Keyword(s):

Rectal Cancer ◽

Risk Stratification ◽

Postoperative Radiotherapy ◽

Population Analyses ◽

Stratification System ◽

Risk Stratification System

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Mapping genetic variation and seed zones for Bromus carinatus in the Blue Mountains of eastern Oregon, USAIn this article, mention of companies or trade names does not constitute an endorsement of any product or procedure.

Botany ◽

10.1139/b10-047 ◽

2010 ◽

Vol 88 (8) ◽

pp. 725-736 ◽

Cited By ~ 23

Author(s):

R. C. Johnson ◽

Vicky J. Erickson ◽

Nancy L. Mandel ◽

J. Bradley St Clair ◽

Kenneth W. Vance-Borland

Keyword(s):

Environmental Variables ◽

Regression Models ◽

Plant Traits ◽

Seed Source ◽

Maximum Temperature ◽

Blue Mountains ◽

Seed Transfer ◽

Bromus Carinatus ◽

Seed Zones ◽

Transfer Zones

Seed transfer zones ensure that germplasm selected for restoration is suitable and sustainable in diverse environments. In this study, seed zones were developed for mountain brome ( Bromus carinatus Hook. & Arn.) in the Blue Mountains of northeastern Oregon and adjoining Washington. Plants from 148 Blue Mountain seed source locations were evaluated in common-garden studies at two contrasting test sites. Data on phenology, morphology, and production were collected over two growing seasons. Plant traits varied significantly and were frequently correlated with annual precipitation and annual maximum temperature at seed source locations (P < 0.05). Plants from warmer locations generally had higher dry matter production, longer leaves, wider crowns, denser foliage, and greater plant height than those from cooler locations. Regression models of environmental variables with the first two principal components (PC 1 and PC 2) explained 46% and 40% of the total variation, respectively. Maps of PC 1 and PC 2 generally corresponded to elevation, temperature, and precipitation gradients. The regression models developed from PC 1 and PC 2 and environmental variables were used to map seed transfer zones. These maps will be useful in selecting mountain brome seed sources for habitat restoration in the Blue Mountains.

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