Sowbug Report
OUTLINE. Introduction to the Question:
-A subclass of pheromones is necromones, which contain oleic acid as a primary component.
-Some pheromones trigger aggregation between organisms, others can trigger separation.
-Necromones trigger necrophoric (organisms remove their dead) or necrophobic (organisms avoid their dead) behavior.
-Arthropods use pheromones, this includes sowbugs and cockroaches. Chemical signals are picked up by antennae.
II. Hypothesis:
When given a choice between two identical shelters, sowbugs will display necrophobic behavior by aggregating in the shelter that does not contain oleic acid.
III. Biological Rationale:
-C.D. Rollo study showed that cockroaches display necrophobic behavior around oleic acid (dead conspecifics).
-Semi-social behavior and necrophobic activity are linked, while social behavior and necrophoric activity are linked.
-Cockroaches and Sowbugs are both arthropods, and they both display semi-social behavior.
-Evidence shows necromones being old method of risk avoidance (420 Ma). All arthropods shared common ancestor at some point.
I - Introduction:
Some arthropods use a class of chemicals called pheromones for intraspecific communication (2.1). A subclass of these pheromones is called necromones (2.3), which signal the death or injury of conspecifics (2.4). Studies have shown that the primary component of some necromones is oleic acid, a type of unsaturated fatty acid (2.4). Organisms can react in two different ways to these chemical signals: Social species, which need to live in colonies in order to survive, undergo necophoric behavior, where organisms actively remove their dead from the nest or colony. Semi-social species, which can operate both individually and in a group, undergo necrophobic behavior, where the organisms actively avoid their dead, injured, or anything excreting oleic acid (2.4). These avoidance and removal responses are adaptive in the sense that when the organism senses the acid, it signals that
-A subclass of pheromones is necromones, which contain oleic acid as a primary component.
-Some pheromones trigger aggregation between organisms, others can trigger separation.
-Necromones trigger necrophoric (organisms remove their dead) or necrophobic (organisms avoid their dead) behavior.
-Arthropods use pheromones, this includes sowbugs and cockroaches. Chemical signals are picked up by antennae.
II. Hypothesis:
When given a choice between two identical shelters, sowbugs will display necrophobic behavior by aggregating in the shelter that does not contain oleic acid.
III. Biological Rationale:
-C.D. Rollo study showed that cockroaches display necrophobic behavior around oleic acid (dead conspecifics).
-Semi-social behavior and necrophobic activity are linked, while social behavior and necrophoric activity are linked.
-Cockroaches and Sowbugs are both arthropods, and they both display semi-social behavior.
-Evidence shows necromones being old method of risk avoidance (420 Ma). All arthropods shared common ancestor at some point.
I - Introduction:
Some arthropods use a class of chemicals called pheromones for intraspecific communication (2.1). A subclass of these pheromones is called necromones (2.3), which signal the death or injury of conspecifics (2.4). Studies have shown that the primary component of some necromones is oleic acid, a type of unsaturated fatty acid (2.4). Organisms can react in two different ways to these chemical signals: Social species, which need to live in colonies in order to survive, undergo necophoric behavior, where organisms actively remove their dead from the nest or colony. Semi-social species, which can operate both individually and in a group, undergo necrophobic behavior, where the organisms actively avoid their dead, injured, or anything excreting oleic acid (2.4). These avoidance and removal responses are adaptive in the sense that when the organism senses the acid, it signals that