Nematode Population
Nematode Population - Related Videos
03:43
Nematode Synchronization: A Method to Obtain Populations of Worms in Identical Stages of Development
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2023
In this video, we show a method of producing a developmentally synchronized population of sterile adult C. elegans. The example protocol synchronizes worms to study oxygen consumption rates in live animals.
09:44
Automated Analysis of a Nematode Population-based Chemosensory Preference Assay
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Cited by 3 •
2017
We present a behavior recording setup and protocol that enables automated analysis of the nematode, Caenorhabditis elegans' preference for soluble compounds in a population-based assay. This article describes the construction of a behavior chamber, the behavioral assay protocol, and video analysis software usage.
09:02
Visualizing Bacteria in Nematodes using Fluorescent Microscopy
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Cited by 20 •
2012
To study the mutualism between Xenorhabdus bacteria and Steinernema nematodes, methods were developed to monitor bacterial presence and location within nematodes. The experimental approach, which can be applied to other systems, entails engineering bacteria to express the green fluorescent protein and visualizing, using fluorescence microscopy bacteria within the transparent nematode.
03:39
An In Vivo Assay to Detect Mitophagy in Transgenic Nematodes
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2025
This video demonstrates an in vivo assay to study mitophagy in Caenorhabditis elegans. Upon exposing the nematodes to a mitophagy-inducing drug, the occurrence of mitophagy is assessed by co-localization between DCT-1, a mitophagy receptor on the damaged mitochondria, and the autophagosomal membrane protein LGG-1.
06:27
Assaying Predatory Feeding Behaviors in Pristionchus and Other Nematodes
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Cited by 18 •
2016
Behavioral assays provide powerful tools for understanding neuronal function. Here we present several protocols for quantifying predatory feeding behavior found in the model nematode Pristionchus pacificus and its relatives. Additionally, we provide methods for analyzing predatory feeding adaptations including mouth structures and teeth.
FAQs
Population size changes when reproduction and development add individuals, while mortality removes them. Movement redistributes individuals within or between habitats, so abundance may change even without a corresponding change in reproduction. Resource availability and biological interactions further modify these processes, producing population patterns that reflect changing ecological conditions.
Resources influence whether individuals can persist and reproduce, while hosts, predators, competitors, and other organisms can alter survival and distribution. These relationships connect nematodes to broader biological communities rather than treating them as isolated organisms. Examining the interactions helps explain why populations differ among environments and how ecological changes affect them.
Researchers interpret population size and distribution alongside environmental and biological associations. Free-living species can be considered within soil communities and food webs, whereas parasitic species are examined in relation to hosts and disease. This comparison uses ecological patterns and interactions to clarify the nematode's role without relying on abundance alone.
Shifts in size or distribution can provide evidence that resource availability, biological interactions, environmental conditions, or management practices have changed. Because these populations respond to multiple ecological processes, their patterns can help researchers assess biological communities and investigate how environmental change influences soil organisms, plant health, or host-associated systems.
A study can measure population size and distribution in a defined environment, then relate those patterns to reproduction, development, mortality, movement, resources, and organismal interactions. Comparing measurements across environments or management conditions helps researchers identify ecological responses and evaluate how population structure changes over time or between settings.
Agricultural monitoring uses population measurements to examine relationships between nematodes, plant health, and management practices. Changes in abundance or distribution can indicate how cultivation conditions influence biological communities. This information supports assessment of plant-associated effects and provides evidence for evaluating whether management changes alter the surrounding nematode community.
Nematode populations are components of soil food webs, where their presence and distribution contribute to understanding relationships among organisms in the soil community. Studying these patterns supports ecosystem assessment and helps researchers examine how biological communities participate in nutrient cycling. Population evidence can also reveal responses to environmental change.
Population measurements help investigators examine host-parasite relationships by connecting nematode abundance or distribution with host-associated conditions. For parasitic species, these patterns can contribute to investigations of disease and biological interactions. The same population perspective also helps distinguish host-related effects from broader environmental influences on nematode communities.