Larval Viability
Larval Viability - Related Videos
08:29
Drosophila Larval IHC
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2023
Immunohistochemistry (IHC) is a technique used to visualize the presence and location of proteins within tissues. Drosophila larvae are particularly amenable to IHC because of the ease with which they can be processed for staining. Additionally, the larvae are transparent, meaning that some tissues can be visualized without the need for dissection. In IHC, proteins are ultimately detected with antibodies that specifically bind to “epitopes” within the protein of interest. In order to preserve...
12:03
Viability Assays for Cells in Culture
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Cited by 39 •
2014
Therapeutic compounds are often first examined in vitro with viability assays. Blind cell counts by a human observer can be highly sensitive to small changes in cell number but do not assess function. Computerized viability assays, as described here, can assess both structure and function in an objective manner.
05:47
Counting and Determining the Viability of Cultured Cells
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Cited by 19 •
2008
Determining the number of cells in culture is important in standardization of culture conditions and in performing accurate quantitation experiments. In this video, we demonstrate how cells are counted using a hemacytometer.
07:18
Visualization of Larval Segmental Nerves in 3rd Instar Drosophila Larval Preparations
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Cited by 13 •
2010
Drosophila melanogaster larvae provide an ideal model system to investigate the mechanisms of axonal transport within larval segmental nerves. Using this procedure, 3rd instar larvae carrying various mutations can be compared to wild type larvae.
10:43
Dissection of Larval Zebrafish Gonadal Tissue
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Cited by 6 •
2017
Here, we present a protocol for isolating gonadal tissue of larval zebrafish, which will facilitate investigations of zebrafish sex differentiation and maintenance.
FAQs
Energy reserves support essential activities such as movement, feeding, growth, and progression toward the next life stage. Larvae in stronger physiological condition may better tolerate environmental challenges, whereas limited reserves can reduce developmental performance. Assessing these reserves alongside survival and growth helps connect a larva’s internal condition with its observable biological outcomes.
Temperature, oxygen, nutrition, salinity, and contaminants can each influence larval performance. These conditions affect physiological condition and may alter survival, movement, feeding, growth, molting, or metamorphosis. Considering several factors together is important because larval responses reflect the combined environmental setting rather than a single measure of habitat quality.
These observations reveal developmental performance beyond simple survival. Movement can indicate functional activity, while feeding and growth provide evidence of nutritional and physiological progress. Successful molting or metamorphosis shows that larvae are advancing toward a subsequent life stage. Together, the indicators provide a broader assessment of biological condition and developmental success.
An assessment examines larvae for outcomes such as survival, movement, feeding, growth, and successful molting or metamorphosis. Researchers can relate these observations to physiological condition, energy reserves, and environmental factors including temperature, oxygen, nutrition, salinity, or contaminants. The resulting pattern helps identify whether larvae are developing normally under the conditions being studied.
Measurements are useful when evaluating breeding and hatchery performance or examining the success of early development. Survival and developmental indicators show whether larvae are progressing toward the next life stage under the relevant rearing conditions. This information can help characterize reproductive success and support decisions in aquaculture and related biological production settings.
Researchers can examine changes in larval survival, movement, feeding, growth, or progression through molting and metamorphosis after exposure to contaminants or other stressors. Because these endpoints reflect both immediate condition and developmental progress, they provide evidence of biological effects. The same approach also supports ecosystem monitoring, conservation, and studies of early-life development.