Survival methods larval. Medical search. Frequent questions

Different fishing methods were used to capture larvae, juveniles, and adults. (scielo.br)
Methods - Wax moth larvae were infected with increasing doses of S. aureus to investigate the effect of inoculum size on larval survival. (stir.ac.uk)
After larvae were infected with S. aureus, larval survival was enhanced by administering the antistaphylococcal antibiotics daptomycin or vancomycin. (stir.ac.uk)
Moreover, penicillin improved survival of larvae infected with a penicillin-susceptible methicillin-susceptible S. aureus (MSSA) strain, but it was ineffective at similar doses in larvae infected with MRSA (penicillin resistant). (stir.ac.uk)
a recent laboratory study reported that up to 100% of A. aureolatum larvae efficiently acquired and maintained the R. rickettsii infection to the nymphal stage, after a larval feeding on experimentally infected guinea pigs ( 9 ). (cdc.gov)
and deleterious effects of R. rickettsii on the survival of larvae and nymphs and on the reproductive performance of female ticks. (cdc.gov)
Imaging of cod and halibut larvae was based on a staining method with a double staining solution in which bones and cartilage are stained (Alazarin red and Alcian blue). (matis.is)
Despite their commercial importance, one factor limiting the growth of the HSB industry is the lack of refined methods to rear larvae in tanks, including the lack of knowledge about optimal rearing conditions, feeding behavior, and efforts to reduce the time larvae spend utilizing live foods, especially rotifers. (usda.gov)
Therefore, goals of this study were to determine the earliest time HSB larvae could be weaned off of rotifers and onto Artemia nauplii at an optimum (26 deg C) and suboptimum (18 deg C) culture temperature and compare total length and survival of the resulting larvae. (usda.gov)
There was no difference in survival in HSB larvae based on how many days they were fed rotifers at either 18 deg C or 26 deg C. However, there was a difference in larval survival between the two rearing temperatures. (usda.gov)
Data on competency curves continue to be collected for a range of species in Palau and Bolinao and "coral plug-ins" (wall-plugs with 2 cm diameter concrete heads) are being trialled as settlement substrates to provide a cost-effective method of rearing coral larvae from spat. (gefcoral.org)
The eggs eventually hatch into larvae, the first larval stage of beetle development. (insecta-inspecta.com)
At NTNU in Trondheim, researchers used newly hatched zebrafish larvae to study their brain activity while gradually increasing the temperature around the larval fish. (newswise.com)
farauti larvae was investigated by longitudinally following the development and survival of different densities of first instars in floating cages in a river-mouth lagoon. (edu.au)
farauti larvae are found raises questions regarding the ability to effectively control the larvae, as incomplete larviciding could trigger density dependent effects resulting in increased larval survivorship. (edu.au)
In this study, we successfully established aging larval zebrafish by exposing larvae to 2 mM hydrogen peroxide (H2O2). (bvsalud.org)
Mosquito larvae are aquatic and go through four development stages (larval instars L1-L4) before pupation. (cdc.gov)

The species has six larval instars. (wikipedia.org)
The greatest reduction in survival and highest sporulation rates were observed primarily on or after 7 d post-exposure for early instars (1st and 2nd). (usda.gov)
Significant declines in survival of early in-stars were observed for all concentrations at 7 d, and 95% mortality by 10 d, with the exception of 5th instars that experienced a less severe reduction in survival (35%) when exposed to any concentrations in the study. (usda.gov)
Survival of late instars (3rd to 5th) ranged from 44% to 68% on day 10, while adult survival was near 99% across the duration of the experiment. (usda.gov)
The relatively narrow range observed for both the LC50 2.01- 11.82 and LS50 of 2.14 - 10.36 spores/mm2 for 2nd, 3rd, and 5th instars cotton bollworms exposed to the C. militaris strain may demonstrate potential field application for control of larval populations of cotton bollworm. (usda.gov)
The composition and micro-distribution of larval instars within a large permanent river-mouth lagoon was examined with a longitudinal survey. (edu.au)

These data have management implications and may provide alternative and supplementation to traditional synthetic insecticides for the control of bollworm larval and pupal populations. (usda.gov)
Significant slowdown of immature (larval and pupal) development and decrease in adult emergence rate after treatment with sub-lethal doses of the bacterium were also detected. (bvsalud.org)
In general, transgenic events had no significant effect on larval survival (P= 0.28) and pupal (P = 0.86) development, though maximum pupation of 96% was observed on event CIP410009.12 that had very low expression levels of cry3Ca1 gene. (sweetpotatoknowledge.org)
For most Anopheles species, larval-pupal metamorphosis commences 1 wk after egg hatching. (cdc.gov)

Benthic species connectivity in the marine environment relies on the degree of exchange of pelagic larval stages from habitats where adult populations spawn and subsequent recruitment in areas where the juveniles can survive to sexual maturity. (frontiersin.org)
The effect of the size and structure of coral fragments on subsequent growth and survival for a range of species is being examined. (gefcoral.org)
Beetle reproduction unfolds through a series of essential stages, each contributing to the species' overall survival and proliferation. (insecta-inspecta.com)
They serve as intricate mechanisms that underpin the survival and adaptation of beetle species. (insecta-inspecta.com)
Center for Species Survival (CSS) scientist Mary Hagedorn is pioneering low-cost, high-impact reproductive technology to offset the effects of climate change on reefs. (si.edu)
Established the first frozen repositories for nine coral species in the United States and Australia, containing 1 trillion frozen sperm and 3 billion frozen larval cells. (si.edu)
Methods are successful with all coral species tested, making these practices widely applicable for all coral and extremely practical to teach to professionals worldwide. (si.edu)
The breeding of octopus in captivity is one of the technological developments that has taken the longest to develop due to the special larval characteristics of this species. (foodnavigator.com)
We tested whether body size, larval period length and survival varied among phenology and density treatments for each species. (confex.com)
We found that body size, length of larval period and survival of A. annulatum varied through an interaction of each species' phenology. (confex.com)
Body size of A. annulatum was larger when species had synchronous (both early or both late) phenologies, but larval period length was shorter when A. annulatum bred later, regardless of when A. maculatum bred. (confex.com)
Larval period length was affected by a three-way interaction of each species phenology and the number of surviving A. annulatum , with asynchronous phenology treatments resulting in stronger covariance of larval period length and A. annulatum survival. (confex.com)
Species vary in the duration of larval development, and a variety of external factors affect the development rate (e.g., water temperature, food type, and larval density), which are discussed more thoroughly elsewhere. (cdc.gov)

The locations were ranked according to each metric and those with higher larval export rates, a higher diversity of larval sources and a high degree of successful larval contribution to other sites were deemed crucial for the management of wild populations. (frontiersin.org)
Larval exchange is considered ecologically relevant if the demography of local populations is impacted by the transport between two sites ( Cowen and Sponaugle, 2009 ). (frontiersin.org)
Does White Clover (Trifolium repens) Abundance in Temperate Pastures Determine Sitona obsoletus (Coleoptera: Curculionidae) Larval Populations? (frontiersin.org)
To determine if host plant abundance determined the size of clover root weevil (CRW) Sitona obsoletus larval populations, a study was conducted over 4 years in plots sown in ryegrass ( Lolium perenne ) (cv. (frontiersin.org)
There was a significant decline in larval populations between 2012 and 2013, but spring populations were relatively uniform thereafter. (frontiersin.org)
Analysis relating spring (October) larval populations to % white clover measured in each plot in autumn (April) found the 2012 larval population to be statistically significantly larger in the ryegrass 6 kg/ha plots than 30 kg/ha plots. (frontiersin.org)
Thereafter, sowing rate had no significant effect on larval populations. (frontiersin.org)
From 2013 to 2015, spring larval populations had a negative relationship with the previous autumn % white clover with the relationship highly significant for the 2014 data. (frontiersin.org)
When CRW larval populations in spring 2013 to 2015 were predicted from the 2013 to 2015 autumn % white clover, respectively, based on their positive relationship in 2012, the predicted densities were substantially larger than those observed. (frontiersin.org)
Conversely, when 2015 spring larval data and % clover was regressed against 2012-2014 larval populations, observed densities tended to be higher than predicted, but the numbers came closer to predicted for the 2013 and 2014 populations. (frontiersin.org)

Environmental temperature affects Anopheles survival directly during the juvenile and adult stages, and indirectly, since temperature during larval development significantly influences adult survival. (biomedcentral.com)
Skeletal defects such as skulls do not appear until the later stages of larval rearing and it is therefore important to develop an easy method of diagnosis earlier in the process. (matis.is)
The objective of this study was to compare the survival, pupation, mortality, and lethal dose on all life stages of the cotton bollworm. (usda.gov)
Survival of cotton bollworms of all stages was not af-fected by C. militaris at any concentration 1-d post exposure. (usda.gov)
During summer 2016, larval vertical distribution differed between taxa (balanids and verrucids), barnacle stages (nauplii, cyprids), and sites within the bay. (copas-coastal.cl)

This provided a range of % white clover content to investigate CRW population establishment and impacts on white clover survival. (frontiersin.org)
The feasibility and potential effectiveness of LSM requires information on the distribution of anophelines, the productivity of larval habitats and the potential impacts of larval control on adult fitness. (edu.au)

We also include optional methods for estimating life history traits such as fecundity, fertility, and larval mortality rates from egg counts. (cdc.gov)

Larval sampling was carried out in spring (October) when larval densities are near their spring peak at Lincoln (Canterbury, New Zealand) with % clover measured in autumn (April) and spring (September) of each year. (frontiersin.org)
Survival was higher at lower densities, and was lower under synchronous compared to asynchronous phenologies. (confex.com)

Temperature during larval development and adult maintenance influences the survival of Anopheles gambiae s.s. (biomedcentral.com)
Data currently exist on the influence of constant and fluctuating adult environmental temperature on adult Anopheles gambiae s.s. survival and on the effect of larval environmental temperature on larval survival, but none on how larval temperature affects adult life-history parameters. (biomedcentral.com)
Upon emergence into imagoes, individual adult females were either left at their larval temperature or placed at a different temperature within the range above. (biomedcentral.com)
The effect of a 4°C increase in larval temperature from 27°C to 31°C depended on the adult environmental temperature. (biomedcentral.com)
Larval mortality rate also depended on the post-inoculation incubation temperature. (stir.ac.uk)
Seawater temperature and the associated formation of a thermocline can affect the spatial distribution of organisms in the water column and possibly modulate larval vertical distribution in coastal waters. (copas-coastal.cl)
However, depending on the amount of food provided, H(2)O temperature, and larval density, the pupation process can be accelerated or delayed. (cdc.gov)

Larval rearing was carried out in 250-L rectangular tanks using phytoplanktons Nannochloropsis oculata and Chlorella salina (1:1 proportion at 1-5 × 106 cells ml− 1), along with different combinations of live micro zooplanktons: Diet I (Brachionus rotundiformis from 1 to 7 dph and Brachionus plicatilis from 8 to 18 dph), Diet II (ciliates Euplotes sp. (researchgate.net)

Malaria transmission depends on vector life-history parameters and population dynamics, and particularly on the survival of adult Anopheles mosquitoes. (biomedcentral.com)
This document specifically does not address releases of mosquitoes for ongoing control programs or trials of new control methods for which broader assessments of risk are required. (cdc.gov)

A passive larval dispersal model was run under four monsoonal regimes (Northeast monsoon, dry-transition, Southwest monsoon, and early Northeast monsoon), and the results subjected to the Infomap network detection algorithm. (frontiersin.org)
Vertical distribution of zooplankton is an important biological factor that can modulate zooplankton transport, dispersal, and survival in the ocean. (copas-coastal.cl)

Methods: A cross-sectional study for diagnostic accuracy was conducted from May 2016 to October 2016. (bvsalud.org)
METHODS: A cross-sectional study was conducted in May 2016 among Gob Gob Primary School children. (bvsalud.org)

Body size and larval period length were negatively and positively correlated with the number that survived, respectively. (confex.com)
2002. Exposure of red-legged frog embryos to ambient UV-B in the field negatively affects larval growth and development. (crbdirt.com)

Here, we provide information on some methods available to collect pupae and to sort pupae by sex. (cdc.gov)

The data also suggest that differences between the temperatures of the larval and adult environments affects adult mosquito survival. (biomedcentral.com)
Understanding what limits survival at extremely high temperatures is crucial to being able to predict how organisms will cope with climate change. (newswise.com)
Challenges associated with warmer temperatures include decreased survival of larval lobsters, increased incidence of shell disease, and increased predation. (gmri.org)

Conclusions: The only documented major malaria vector collected in larval surveys in both Central and Western Provinces was An. (edu.au)

Overall, we found no impact of any pesticide on immature development time and relatively weak effects on larval herbivory or survival to adulthood. (nature.com)

and Roseovarius crassostreae, cause severe mortality of larval and juvenile eastern oysters. (uri.edu)
Pretreatment of larval and juvenile oysters for 24 h with 10 2 -10 6 cfu/mL Phaeobacter sp. (uri.edu)

In a laboratory experiment previously reported ( 9 ), the first generation (F 1 ) larval progeny of engorged A. aureolatum female ticks collected in Atibaia, São Paulo State, Brazil, were allowed to feed on 4 R. rickettsii- infected guinea pigs (infected group) and 2 uninfected guinea pigs (control group). (cdc.gov)
A series of larval rearing experiments were planned at Bolinao Marine Laboratory (BML) during May 2009. (gefcoral.org)

Under severe larval infestations, a decrease in percent foliar N levels in spring can occur, with subsequent reductions in herbage dry matter (DM) yield levels ( Gerard, 2002 ). (frontiersin.org)

In conclusion, our results show that abiotic factors strongly influence the temporal pattern of reproductive activity and larval assemblages of both L. grossidens and P. platana in Peri Lagoon, Brazil. (scielo.br)
However, lower reproductive performance and survival of infected females was attributed to R. rickettsii infection. (cdc.gov)

0.05) explanatory variables for total larval catch were stream, sampling method, week of summer, time of day, and moon phase. (bioone.org)

We tested whether the outcome of intraguild predation between a pair of larval salamanders ( Ambystoma annulatum and A. maculatum ) varied in response to altered phenology and density. (confex.com)

Three methods, integrated multitrophic aquaculture (IMTA), recirculating aquaculture system (RAS), and beneficial bacteria for aquaculture, have been developed to solve these problems. (mdpi.com)
The research institute has made an exclusive agreement about the patented production method with Spanish company Nueva Pescanova, which has progressed the research at its facilities and plans to begin soon selling aquaculture octopus. (foodnavigator.com)
The company says it is firmly committed to aquaculture as a method to reduce pressure on fishing grounds and ensure sustainable, safe, healthy, and controlled resources, complementing fishing. (foodnavigator.com)
Pescanova further claims the survival rate of a wild octopus is 0.0001% while, a figure it estimated can be raised to 50% in aquaculture. (foodnavigator.com)

The whole root bioassay had less handling injuries to weevils compared with other methods. (sweetpotatoknowledge.org)
The small root egg plug bioassay required much fewer roots and experimental insects to assess larval mortality and development. (sweetpotatoknowledge.org)
Hence, the most appropriate method for testing Bt efficacy in sweetpotato is the small root egg-plug bioassay. (sweetpotatoknowledge.org)
Two bioassay methods were utilized in these investigations. (who.int)

In addition, this method was the most labour intensive in terms of frequent replacement of root chips for weevil development. (sweetpotatoknowledge.org)

The throughput was increased by applying strain isolation on plates and taxonomic identification by direct PCR (dPCR) of phylogenetic marker genes in combination with a novel sequencing electropherogram based screening method to assess the taxonomic diversity and identity of the isolated cultures. (biomedcentral.com)
To assess as to whether a culture was unialgal or not, we applied direct PCR (dPCR) by only using boiling MiliQ water to lyse the cells in combination with a novel sequencing electropherogram based assessment method. (biomedcentral.com)

Lagoons and swamps, the most common, largest and (potentially) most productive larval sites of this malaria vector, were "few, fixed and findable" and theoretically, therefore, amenable to successful LSM. (edu.au)

A secondary challenge in disentangling the role of pesticides in butterfly population ecology is that chemicals can act on either the larval or adult stage. (nature.com)

In this study, two passive sampling methods were compared for use in collecting larval freshwater and estuarine fishes in two tropical streams. (bioone.org)

Assessment of early life history characteristics requires effective sampling methods for larval fishes. (bioone.org)

Courtship behaviour, captive breeding, embryonic and larval developments of Nemateleotris decora and its rearing with suitable live feed were described. (researchgate.net)

Both hatching and larval survival rates were recorded daily. (europa.eu)
Poecilia exhibited greater survival rates than Gambusia (86.04 vs .16.03%) in cement tanks. (biomedcentral.com)

Subsequently, females lay eggs, each carefully positioned in a specific habitat chosen to optimize the survival prospects of their future offspring. (insecta-inspecta.com)
Methods: The distribution of anophelines in Central and Western Provinces in the Solomon Islands was mapped from cross-sectional larval habitat surveys. (edu.au)

After fertilization, females carefully select optimal egg-laying sites, considering factors such as food availability and environmental suitability, ultimately ensuring the survival of their offspring. (insecta-inspecta.com)
In this study, we examined larval vertical distribution over small spatial scales where environmental conditions could exhibit strong and fairly predictable variability. (copas-coastal.cl)

Insecticides are the favoured method of controlling the moth in most commercial plantations. (wikipedia.org)

A long-term study (34 days) was conducted on Pimephales promelas eggs (OECD 210 guidelines, semi-static method). (europa.eu)
The goal of this study was to screen and characterize marine bacterial isolates as potential agents to prevent larval and juvenile mortality by the oyster pathogens Vibrio tubiashii and R. crassostreae . (uri.edu)
In this study, we report a cost effective and high-throughput isolation and identification method for marine microalgae. (biomedcentral.com)

In Palau, a disease outbreak in some of the mid-water culture cages in January 2008 resulted in disappointing survival of Acropora being co-cultured with snails, while transplanted juveniles suffered from fish grazing. (gefcoral.org)

However, insects who were exposed to treated corn leaf tissues showed a significant steep decline in survival for all concentrations assayed in this experiment. (usda.gov)
The model estimates that, even in the face of warming waters, more restrictive conservation methods would have limited the population decline from 78% to 57% over the 30-year period. (gmri.org)

We evaluated the effectiveness of combined information, education and communication (IEC) campaigns using two potential poeciliid larvivorous fish guppy ( Poecilia reticulata ) and mosquitofish ( Gambusia affinis ), in indoor cement tanks for Aedes larval control. (biomedcentral.com)
Professional pest control treatments to the exterior of your structure will greatly reduce fly activity and survival on and in your space. (plunketts.net)
Cultural Control Methods that may provide partial control of these beetles, which can be especially important in organically certified crops, include the use of trap crops such as Chinese Southern Giant Mustard (Brassica juncea var. (garynestapine.com)
Practical methods for control of algae and water weeds. (crbdirt.com)

A series of comparative studies were conducted to evaluate the efficacy of two different exposure methods using four different concentrations (n × 109, n × 108, n × 107, n × 106) of C. mili-taris, where (n × 109) provided a concentration of approximately 420 ± 37 spores per mm2 with 398 ± 28 viable spores. (usda.gov)

Adult bollworms moths experienced little to no mortality during the ten-day observation period regardless of exposure method or concentration. (usda.gov)

On the exterior, remove all potential larval food materials such as animal manure, rotting mulch, lawn clippings, and animal or bird carcasses. (plunketts.net)

Root chips were prone to damage by fungi and desiccation especially during the first larval instar. (sweetpotatoknowledge.org)

The early life history of fishes is a critical period for effective conservation and management, as many processes during this period influence survival and subsequent recruitment to larger size-classes ( Chambers and Trippel 1997 ). (bioone.org)

However, the method that has been used to differentiate type II muscle fibers into subtypes IIA and IIB is excluded, but it was found that the response with that method was not decisive and it is therefore appropriate to point out the use of other and more precise methods. (matis.is)

When activated they transmit a burst of signal that controls critical behaviors like growth, survival and movement. (elifesciences.org)

Survival was monitored every 24 hours and data were analysed using non-parametric and parametric methods. (biomedcentral.com)

All three contributors to vectorial capacity can be estimated vide guidance for evaluating their safety and practices to in a single experiment method using MRR. (cdc.gov)

1999. Henry's law constants for a diverse set of organic chemicals Experimental determination and comparison of estimation methods. (cdc.gov)

Results - Increasing inoculum doses of live S. aureus cells resulted in greater larval mortality, but heat-killed bacteria and cell-free culture filtrates had no detrimental effects on survival. (stir.ac.uk)
Image analysis is considered an interesting choice of analytical method which allows detection of tissue structures and analysis of the effects of various factors on tissue structure and various quality parameters. (matis.is)
The extracts were assessed for Possible abortifacient effects by an in vitro method of testing for uterotonic activity. (who.int)
An in vivo method was utilized in order to determine any anti-implantation, early abortifacient and/or foetal resorption effects of these extracts. (who.int)

Survival rate of P. pendula eggs differs based on chosen host plant. (wikipedia.org)

The methods used here could also be used to investigate the movement of other signaling molecules. (elifesciences.org)

Hydatidosis or hydatid cyst is a prevalent zoonosis all over the world due to larval forms of the tapeworm of the genus Echinococcus. (bvsalud.org)

Short-term methods for estimating the chronic toxicity of effluents and receiving waters to freshwater organisms. (epa.gov)
Screening of bacterial isolates from Rhode Island marine organisms and environment using agar-based assay methods for detection of antimicrobial activity against oyster pathogens led to the isolation of candidate probionts Phaeobacter sp. (uri.edu)

Anatomy8

Organisms8

Diseases54

Chemicals and Drugs58

Analytical, Diagnostic and Therapeutic Techniques and Equipment84

Phenomena and Processes37

Disciplines and Occupations1

Anthropology, Education, Sociology and Social Phenomena2

Humanities1

Information Science8

Named Groups3

Health Care37

Geographicals1

Larvae17

Instars6

Pupal4

Species13

Populations10

Stages5

Impacts2

Fecundity1

Densities2

Temperature7

Rearing was carried1

Mosquitoes2

Dispersal2

20162

Negatively2

Pupae1

Temperatures3

Conclusions1

Immature1

Oysters2

Laboratory2

Severe1

Reproductive2

0.051

Predation1

Aquaculture4

Bioassay4

Weevil1

Assess2

Malaria1

Stage1

Passive1

Characteristics1

Suitable1

Rates2

Habitat2

Environmental2

Moth1

Study3

Juveniles1

Decline2

Control4

Efficacy1

Exposure1

Food1

Fungi1

Subsequent recruitment1

Differentiate1

Growth1

Data1

Experiment1

Experimental1

Effects4

Eggs1

Investigate1

Genus1

Organisms2