Field studies have shown that animals often abandon territorial defense when food is abundant, but the causes of this behavior are controversial. Sometimes the cessation of defense is attributed to the food supply being so abundant that monopolization of the resource gains the defender nothing, even though defense would be energetically feasible. Other studies show that when the food supply is rich, such large numbers of competitors are attracted that defense is overwhelmed. Knowledge of the amount of food available relative to the numbers of consumers in the region can resolve the controversy. When food is limited throughout a region, a localized rich foraging area will attract competitors.Defense of such an area therefore may yield a large increase in net benefit to the defender, depending on whether or not so many competitors recruit that defense is too costly. However, when a localized foraging area is rich but food is also superabundant throughout the region, intruders may not recruit even if the area is undefended. Therefore the benefits of defense, if it were to occur, would be low. Field studies of nectar-feeding birds show that defense continued on rich foraging areaswhen floral nectar was limited to the population regionally, and resulted in enhanced food availability relative to that in undefended areas. However, under conditions of artificially rich food supplies (sugar-water feeders) and extremely limited food regionally, defense was sometimes overwhelmed by competitors. Cessation of defense on locally rich for...
Food Supply Sugar-water Feeders Benefits Of Defense Foraging Area Undefended Areas Food Abundance Field Studies Rich Supplies Rich Area Localized Area
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Introducing Weekly Round-ups!Beta
Round-ups are the summaries of handpicked papers around trending topics published every week. These would enable you to scan through a collection of papers and decide if the paper is relevant to you before actually investing time into reading it.
Climate change Research Articles published between Sep 19, 2022 to Sep 25, 2022
Sep 26, 2022
Articles Included: 5
Disaster Prevention and Management ISSN: 0965-3562 Article publication date: 20 September 2022 This paper applies the theory of cascading, interconnec...Read More
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