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Response of a Social Fish to Changes...

Gaynor, Ryan Layne,

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Response of a Social Fish to Changes in the Visual Environment /

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Response of a Social Fish to Changes in the Visual Environment // Ryan Layne Gaynor.
作者:	Gaynor, Ryan Layne,
面頁冊數:	1 electronic resource (152 pages)
附註:	Source: Dissertations Abstracts International, Volume: 86-11, Section: B.
Contained By:	Dissertations Abstracts International86-11B.
標題:	Limnology. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=32112074
ISBN:	9798314892916

Response of a Social Fish to Changes in the Visual Environment /
Gaynor, Ryan Layne,

Response of a Social Fish to Changes in the Visual Environment /Ryan Layne Gaynor. - 1 electronic resource (152 pages)

Source: Dissertations Abstracts International, Volume: 86-11, Section: B.

The collection and sharing of information between group members is a key component of sociality. In complex structured societies, individuals interact with group members repeatedly and collect and track valuable social information, such as rank, identity, and interaction history, to appropriately moderate their social behavior. An individual?s ability to effectively gather pertinent social information is strongly influenced by the properties of their sensory environment. Therefore, changes in the sensory environment have the potential to disrupt social-information gathering, potentially resulting in maladaptive changes in social behavior. Human induced rapid environmental changes (HIREC) are impacting an increasing number of ecosystems, resulting in novel changes in the sensory environment. Despite this, we still do not have a good understanding of how HIREC-induced changes in the sensory environment impact social behavior. The primary objective of this dissertation was to investigate how changes in the sensory environment affect individuals? perceived environment and subsequent social behavior. My central hypothesis is that novel changes in the sensory environment alter social behavior within groups by impairing the ability of individuals to recognize, discriminate between, and assess the behavior of groupmates. To test my hypothesis, I used a combination of mathematical modelling and laboratory experiments to explore how changes in the visual environment impact signal perception, social interactions, and cooperative behavior in the social cichlid Neolamprologus pulcher. In Chapter 2, I modelled optimal subordinate helping decisions under varying levels of uncertainty. I found that dominant uncertainty about subordinate identity had size-specific effects on subordinate helping, while increased dominant uncertainty about the amount of help being provided resulted in increased subordinate helping. I also show that changes in dominants? ability to assess the amount of help being provided strongly impacts subordinate fitness outcomes. In Chapter 3, I examined how a purely visual change in the environment affected subordinate helping, social behavior, and group structure. I found that under low light conditions agonistic interactions between dominant females and large subordinates were reduced, which may indicate a reduced ability of dominants to detect nearby subordinates. This reduction in agonistic interactions also resulted in more poorly defined dominance relationships. Subordinate helping did not vary with light level potentially indicating that helping is robust to short-term changes in the sensory environment. Post-treatment, dominance relationships did not return to their pre-disturbance states and agonistic interactions between dominant pairs increased, suggesting that groups of N. pulcher have low resilience to perturbations in the visual landscape. In Chapter 4, I assessed how elevated water turbidity affected the ability of N. pulcher to recognize and discriminate between conspecifics. I found that in high turbidity individuals? ability to recognize a conspecific was impaired, which could result in increased conflict with neighbors and groupmates. Individuals in high turbidity also took longer to begin interacting with the stimulus fish and were less active than individuals in low turbidity conditions. Collectively, this work advances our understanding how of HIREC can affect social species by showing how changes in the sensory environment impact signal perception, decision-making, and social behavior.

English

ISBN: 9798314892916Subjects--Topical Terms:

545788
Limnology.
Subjects--Index Terms:

Environmental changes

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650 4 $a Aquatic sciences. $3 3174300
650 4 $a Environmental science. $3 677245
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