An individual-based modeling approach for evaluation of endpoint sensitivity in harpacticoid copepod life-cycle tests and optimization of test design

2011 ◽  
Vol 30 (10) ◽  
pp. 2353-2362 ◽  
Author(s):  
Thomas G. Preuss ◽  
Markus Brinkmann ◽  
Elin Lundström ◽  
Bengt-Erik Bengtsson ◽  
Magnus Breitholtz
Keyword(s):  
Life Cycle ◽  
Harpacticoid Copepod ◽  
Test Design ◽  
Modeling Approach ◽  
Individual Based Modeling

scholarly journals Effects of environmental factors on Tigriopus fulvus, Fischer 1860, a Mediterranean harpacticoid copepod

2018 ◽  
Vol 91 (1) ◽  
Author(s):  
Guido Bonello ◽  
Cristiano Angelini ◽  
Luigi Pane
Keyword(s):  
Climate Change ◽  
Life Cycle ◽  
Environmental Factors ◽  
Population Density ◽  
Harpacticoid Copepod ◽  
Environmental Parameters ◽  
Chemical Parameters ◽  
Climate Change Effects ◽  
Physical Chemical ◽  
Extinction Event

Tigriopus fulvus (Fischer, 1860) is a benthic harpacticoid copepod of the Mediterranean supralittoral zone. The transitional characteristics of this environment forced this species to develop high resistance to changes of environmental parameters. Nevertheless, Tigriopus fulvus life-cycle is influenced from the splashpools physical-chemical parameters. In this paper, we present the results of a supralittoral monitoring performed in 2014, confirming the influence of some of these environmental parameters on population buildups. Because of recent worldwide climate change effects, a threat might have been posed on this particularly exposed organism, whose population density decreased of a sixfold value in the last 30 years. During the three pools (A, B, C) monitoring, the maximum copepod density recorded was 1456 Ind/l (September 2014, Pool C), alongside first records of extinction event for Tigriopus fulvus.

A demographic study of the life cycle of Tisbe furcata (Baird, 1837) (Copepoda: Harpacticoida)

1981 ◽  
Vol 61 (3) ◽  
pp. 691-705 ◽  
Author(s):  
Marc Bergmans
Keyword(s):  
Life Cycle ◽  
Generation Time ◽  
Harpacticoid Copepod ◽  
Intrinsic Rate ◽  
Reproductive Rate ◽  
Natural Increase ◽  
Net Reproductive Rate ◽  
Life Table Data ◽  
Table Data ◽  
Stable Stage

The life-cycle of the harpacticoid copepod Tisbe furcata (Baird, 1837) at 18 C was studied quantitatively. Stage durations were determined by two different methods, using synchronous cohorts. Combined nauplius stages last for 80·4 h; the successive copepodite stages take 23·0, 23·2, 28·0 (♀) to 23·2 (♂), 33·4 (♀) to 24·2 (♂) and 48·8 (♀) to 34·7 (♂) h, respectively. Females develop more slowly but more synchronously than males. Age-specific survival and fertility rates were used to calculate the stable stage distribution in an exponentially growing population. From life-table data the following demographic parameters were computed: intrinsic rate of natural increase rm = 0·233 day−1; net reproductive rate Ro = 94; minimum generation time Tmin = 14·9 days; parameters related to ‘generation time’: T = 19·5 days, = 16·4 days, Tc = 25·4 days.

Life cycle analysis of metals in emerging photovoltaic (PV) technologies: A modeling approach to estimate use phase leaching

2018 ◽  
Vol 186 ◽  
pp. 632-639 ◽  
Author(s):  
Ilke Celik ◽  
Zhaoning Song ◽  
Adam B. Phillips ◽  
Michael J. Heben ◽  
Defne Apul
Keyword(s):  
Life Cycle ◽  
Life Cycle Analysis ◽  
Modeling Approach ◽  
Use Phase

Perbedaan Tingkat Pemenuhan Kebutuhan Tidur Pada Lansia Sebelum Dan Sesudah Pemberian Teknik Relaksasi Benson Di Panti Sosial Lanjut Usia Pare Kabupaten Kediri Tahun 2012

2017 ◽  
Vol 4 (1) ◽  
pp. 31
Author(s):  
Kun Ika Nur Rahayu
Keyword(s):  
Life Cycle ◽  
Research Design ◽  
The Elderly ◽  
Relaxation Technique ◽  
Test Design ◽  
Purposive Sampling ◽  
Geriatric Clinic ◽  
Before And After ◽  
Result Show ◽  
Post Test

Elderly is the last phase of everyone’s life cycle, where they got change biologically, pshycologically, and socialy. Commonly, the elderly got disturbance in quality and quantity sleep needed. Sleeping is a basic needed of all human to be functioned well. According to Luce and Segal (2000). There is 22% elderly cases whose wake up earlier (less than 05.00 p.m) for the elderly in 70 th. Beside, there is 30% for the elderly in 70 th whose wake-up at midnight. One of the solution to solve the problem is using Benson Relaxation technique. This technique can solve the sympthom of sleeplessness such as insomnia, pain and anxiety. The purpose of this research is to know the different the fulfil of sleep needed for elderly before and after giving Benson Relaxation technique in Geriatric Clinic “Lanjut Usia”  Pare Kediri in 2012. The research design is pre experimental with one group pre and post test design. The population is elderly in 60-74 years old who got sleeplessness but still can communicate well. The sample is 30 person the sample taken used purposive sampling. It used questionnaire instrument to know the sleep needed of elderly. Then the data analyzed using statistic Willcoxon. The result show, the fulfil of sleep needed for elderly before giving Benson technique is 83% while after giving is 77%. Based on statistic test is gotten ρ=0,00 with α = 0,05. So ρ ; α, Ho is rejected. It means, there is the deferent of sleep needed level before and after giving Benson Relaxation technique can be used for nurses to solve the problem of sleep for elderly.;Keywords : elderly, sleep, Benson Relaxation

scholarly journals Adjusting for comorbidity in incidence-based DALY calculations: an individual-based modeling approach

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Scott A. McDonald ◽  
Juanita A. Haagsma ◽  
Alessandro Cassini ◽  
Brecht Devleesschauwer
Keyword(s):  
Modeling Approach ◽  
Individual Based Modeling
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