Answered: hlid fish display was unknown. The…

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter4: Equations Of Linear Functions

Section: Chapter Questions

Problem 8SGR

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Fish produce a hormone called isotocin, a hormone that is similar to oxytocin in mammals. Both hormones, oxytocin and isotocin, have been linked to social behaviors including the suppression of social anxiety, trust, and attachment. Prior to this study the relationship between isotocin in the bloodstream and the amount of aggression or submission individual cichlid fish display was unknown. The researchers hypothesized that isotocin would suppress aggressive behaviors in cichlids to promote social cohesion as these fish exist in large social groups (schools). To address this hypothesis each of 10 fish were exposed to two treatments 1 week apart. One at a time a fish was randomly selected from the group of 10 and either injected with a saline solution ( that served as the control) or with isotocin. After this injection the fish was returned to its group and the amount of aggressive and submissive behaviors the fish demonstrated was recorded for the next 10 minutes. One week later this process was repeated with each fish recieve f the treatment it did not experience the week prior. This each fish served as its own control. 4. Describe a follow up study that you could do to further address the relationship between the cichlid fish dominance and aggressive behavior and isotocin. What would you do differently? What would you keep the same? Why? 5. Describe how researchers could take an adaptive value approach to understanding cichlid fish aggression and submissive behaviors amongst a school of fish.

Fish from
Group Number
10.
1 Cichlids Fish
2 Cichlids Fish
3 Cichlids Fish
4 Cichlids Fish
5 Cichlids Fish
6 Cichlids Fish
7 Cichlids Fish
8 Cichlids Fish
9 Cichlids Fish
10 Cichlids Fish
Average:
Std
Isotocin Injected
# of acts per 10 minutes
Submissive
Aggressive
6
8
3
1
5
6
4
4.5
8
4
5
8
764
9
3
6.2
Saline Injected Control
# of acts per 10 minutes
Submissive
Aggressive
2
3
6
5
2
3
1.7
4
6
1
5
4
2
3
4
1.5

Level of
Aggressive
and
Submissive
Cichlids
6.2
4.96
3.72-
2.48
1.24
0
4.5
Isotocin Injected
Aggressive Cichlid
Cichlids Experiment
4.2
Saline Injected
Control Aggressiv..
Isotocin Injected
3.7
Saline Injected
Control..
Submissive..
Cichlids Injected with Behaviors Inducing Solutions

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