P. agrestis is the most abundant spider in central European agricultural habitats, preferring to inhabit open spaces.
Its lifespan is around 1–2 years and its diet consists mainly of other arthropods, exhibiting non-sexually cannibalistic behavior at times.
[2] The average female body size is representative of the abundance of resources in its habitat and also is positively correlated with fecundity.
Since Pardosa agrestis populates crop fields in high densities, it potentially plays a significant role as a control agent against insects and pests.
[4] Because Pardosa agrestis inhabit agricultural areas, they frequently face decimation, subsequently rebuilding and recolonizing.
Therefore, the availability and quality of non-arable land around the spiders’ natural habitat plays a major role in the abundance of Pardosa agrestis in an arable field.
Its population density is highest in farming fields that are a short distance away from long, wide, and grassy road-side strips.
Woody areas also provide shelter to females carrying egg sacs, resulting in enhanced offspring survival.
[3] Pardosa agrestis is the dominant surface-dwelling spider species in farming grounds in Central Europe and certain areas in North America and Asia.
To combat this, it has evolved to be resistant to hunger and will masticate its food to compensate for the lack of prey captured, especially in the winter.
The spider chews down the hunted prey to a meat ball using their chelicerae, lengthening the digestion process and abstracting as many nutrients as possible.
Even when the extended copulation period was interrupted at ten minutes, the number and size of offspring, and the time the female took to produce an egg did not change.
The spider spends a considerable amount of energy during copulation, misses opportunities to mate with others, and foregoes foraging resources.
Long copulation in Pardosa agrestis occurs without hiding in a safe area, thus increasing the spider's vulnerability to predation.
Adult females and males start appearing more in late April and peak in June, which is the first mating season for Pardosa agrestis.
A slowly developing spider will need to face the high mortality rate of surviving the winter as a non-adult.
Juvenile Pardosa agrestis spiders play the main role in recolonizing following a disruption of their habitat, as they have a greater range of movement when compared to adults, thanks to their ballooning ability.
This process serves to strengthen the fitness of larger spiders when other nutrients are not in reach, and plays a role in population regulation.
Handling time takes into account the size difference between the predator and prey, aiming to minimize retaliation risk and profitability of the interaction.
Another important factor that contributes to the occurrence of cannibalistic behavior in Pardosa agrestis is encounter frequency.
During the act of cannibalism, the spider will have to face a prey that contains similar predatory mechanisms, which increases the chance of retribution.
Also, if a hungry spider has limited access to resources, it will be more prone to cannibalize, resulting in it attacking larger prey and increasing its chances of getting injured or killed.