Answered: Fish from Group Number 1 2 3 4 5 6 7 8…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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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 receiving the treatment it did not experience the week prior. Thus, each fish served as its own control. Below is the data the researchers collected. Compile the data and create a graph that best represents these data. Standard deviation (1 Std) values have been provided for you and should be included in graph. 4) Describe a follow-up study that you could do to further address the relationship between 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
1
2
3
4
5
6
7
8
9
10
Average:
Std
Isotocin Injected
Control
# of acts per 10 minutes # of acts per 10 minutes
Aggressive Submissive Aggressive Submissive
6
5
2
3
3
4
6
6
3
5
8
3
4
1
5
6
4
1.9
7
8
4
5
8
7
6
9
3
1.9
5
2
3
4
5
1.7
5
2
3
4
1.5

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