scholarly journals Consequences of keepingMytilus in the laboratory as assessed by different cellular condition indices

1991 ◽  
Vol 45 (4) ◽  
pp. 445-464 ◽  
Author(s):  
M. P. Cajaraville ◽  
G. Díez ◽  
I. A. Marigómez ◽  
E. Angulo
Keyword(s):  
Condition Indices ◽  
Cellular Condition

Performance assessment on degrading concrete structures including considerations on the time variant alteration

2021 ◽  
Author(s):  
Fritz Binder ◽  
Stefan L. Burtscher ◽  
Alfred Strauss
Keyword(s):  
Prestressed Concrete ◽  
Chloride Content ◽  
Degradation Process ◽  
Analytic Hierarchy ◽  
Reliable Determination ◽  
Chloride Attack ◽  
Durability Assessment ◽  
Condition Indices ◽  
Condition State ◽  
Hierarchy Process

<p>The infrastructure of ASFiNAG is mainly built from reinforced and prestressed concrete, which despite all regular maintenance measures, is subject to ageing and degradation. The major degradation process is chloride attack, followed by carbonation, which both lead to corrosion of the reinforcing steel. In this paper chlorides in the concrete are analysed with a new method, which represents a major improvement over previous assessment. The paper also introduces a new concept for the durability assessment by using objective indicators, like chloride content, electrical resistivity, and corrosion potential. For objectivity and a reliable determination of the condition state, an overall performance index derived from the condition indices using an analytic hierarchy process (AHP) is adopted. The model is applied to excellent and dense data from a monitoring system and investigations taken from reinforced concrete components beside the motorway.</p>

scholarly journals Study of Condition Indices in Goby, Parachaeturichthys Ocellatus (Day, 1873) from the Creeks of Mumbai

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Bindu Panicker
Keyword(s):  
Nutritional Status ◽  
Dna Content ◽  
Good Condition ◽  
Suitable Habitat ◽  
Rna Content ◽  
Condition Indices ◽  
Reproductive Cycles

Condition indices study like RNA content, DNA content, RNA: DNA, RNA: protein, RNA: lipid was carried out in goby, Parachaeturichthys ocellatus from the creeks of Mumbai to assess its nutritional status in different months. The study was carried out from June 2010 to September 2011.The range of RNA content in male was 72-185.6 µg/100 mg while in female was 82-145.46 µg/100 mg. RNA content was high during spawning months. The DNA content showed slight variations with range of 22.56- 39.31 µg/100 mg in males and 25.20-32.52 µg/100 mg in females. The range of ratio of RNA: DNA in males was 2.08-5.13 with an average of 3.74 while in female was 2.92-5.07 with an average of 3.99. The ratio above 2 indicates good condition. The RNA: protein showed an average of 0.0015 in males and 0.0017 in females while the average of RNA: lipid was 0.0176 in males and 0.0127 in females. RNA: protein and RNA: lipid showed the lowest values in post reproductive stages while it increased with the onset of reproductive cycles. The condition indices study showed that P. ocellatus was in good condition throughout the year and the creeks of Mumbai were suitable habitat for feeding and reproduction.

Comparing three body condition indices in amphibians: a case study of yellow-bellied toad Bombina variegata

2010 ◽  
Vol 31 (4) ◽  
pp. 558-562 ◽  
Author(s):  
Rodica Plăiaşu ◽  
Tibor Hartel ◽  
Raluca Ioana Băncilă ◽  
Dan Cogălniceanu ◽  
Joost Smets
Keyword(s):  
Body Size ◽  
Body Condition ◽  
Condition Index ◽  
Quality Parameters ◽  
Direct Measurements ◽  
Wide Range ◽  
Bombina Variegata ◽  
Condition Indices ◽  
Three Body

AbstractBody condition is important because it is correlated with population and habitat quality parameters. Since the direct measurements are either lethal or unreliable, a wide range of non-lethal body condition indices has been proposed. The aim of our study was to apply and compare three body condition indices (Fulton's index, relative body condition mass index and residual index) using body size indicator – body mass data for 24 populations of the yellow bellied toad (Bombina variegata). The condition index should be independent of body size indicator, in this case snout vent length (SVL). Therefore we tested all three indices for the statistical independence of SVL and for the normality of distribution. Fulton's index violated the independence assumption, whereas the relative body condition mass index did not have a normal distribution. Residual index was found both independent of SVL and normally distributed. Moreover, the residual index highlighted biological significant differences on the basis of altitude and season. Our results recommend the residual index as a useful tool in amphibian monitoring and conservation.

Reproductive biology of Eledone moschata (Cephalopoda: Octopodidae) in the Gulf of Cádiz (south-western Spain, ICES Division IXa)

2004 ◽  
Vol 84 (6) ◽  
pp. 1221-1226 ◽  
Author(s):  
Luis Silva ◽  
Fernando Ramos ◽  
Ignacio Sobrino
Keyword(s):  
Reproductive Period ◽  
Female Dominance ◽  
Gulf Of Cadiz ◽  
Annual Life Cycle ◽  
Gulf Of Cádiz ◽  
Mean Size ◽  
The Mean ◽  
Western Spain ◽  
By Catch ◽  
Condition Indices

Reproductive aspects of Eledone moschata from the Spanish waters of the Gulf of Cádiz are reported for the first time. The species is relatively abundant over the continental shelf and it is caught as by-catch by the bottom-trawl fleet. Monthly samplings throughout one annual life-cycle showed a sex ratio with a female dominance (0·45:1). A four stage maturity scale was used for both sexes. The reproductive period was determined from monthly evolution of these stages as well as that of several maturity and condition indices. The breeding season extended from October to June, with spawning peaks in October and March–May, the second one being more important. Length and weight at maturity (mantle length50, body weight50) were estimated at 7·8 cm and 97 g in males, and at 12·2 cm and 274 g in females, respectively. Total fecundity, estimated from 52 mature females, was 443·5±154·4 oocytes on average. The mean size of mature oocytes and the mean length of mature spermatophore in mature females and males was 10·24 mm (±1·07) and 13·88 mm (±1·60), respectively.

Impact of helminth parasitism on a snowshoe hare population in central Wisconsin: a field experiment

1995 ◽  
Vol 73 (10) ◽  
pp. 1891-1898 ◽  
Author(s):  
Sara E. M. Bloomer ◽  
Thomas Willebrand ◽  
Ingegerd M. Keith ◽  
Lloyd B. Keith
Keyword(s):  
Survival Rates ◽  
Snowshoe Hare ◽  
Marrow Fat ◽  
Proximate Cause ◽  
Risk Of Death ◽  
Snowshoe Hares ◽  
Condition Indices ◽  
Time Specific ◽  
And Control ◽  
Hare Population

We tested the hypothesis that helminth parasitism is demographically significant to a noncyclic population of snowshoe hares (Lepus americanus) near the species' geographic boundary in central Wisconsin (U.S.A.). During November 1988 to December 1991, we injected 93 individuals (≥760 g, aged ≥2 months) with anthelmintics: Ivermectin for nematode and Droncit for cestode infections. We injected 98 control hares with propylene glycol, the common vehicle for both drugs. All treated and control hares were radio-collared with mortality-sensing transmitters and monitored daily to weekly from the ground or air. Prevalence and intensity of lungworms (Protostrongylus boughtoni), intestinal worms (Nematodirus triangularis), and stomach worms (Obeliscoides cuniculi) were markedly reduced by Ivermectin treatment. No other nematodes were found to be present. Treatment with Droncit to remove intestinal cestodes was apparently unnecessary, as prevalence among necropsied untreated hares and controls was just 10%. We compared body-condition indices (mass changes, response to trap stress, and bone-marrow fat), reproduction (pregnancy rate and litter size), home-range sizes, and time-specific survival rates of anthelmintic-treated versus control hares. None of these demographic variables differed significantly between treated and control cohorts, nor was there any evidence that parasitism increased the risk of death from predation, which was the proximate cause of 96% of all natural mortalities. We conclude that helminth parasitism played no detectable role in the dynamics of this Wisconsin snowshoe hare population.

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