Testing foraging arena theory: The effects of conspecific density and habitat type on time and energy budgets of juvenile cunner.
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| Title: | Testing foraging arena theory: The effects of conspecific density and habitat type on time and energy budgets of juvenile cunner. |
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| Authors: | Tupper, Mark1 mark.tupper@utt.edu.tt, Juanes, Francis2 juanes@uvic.ca |
| Source: | Journal of Experimental Marine Biology & Ecology. Feb2017, Vol. 487, p86-93. 8p. |
| Subjects: | Foraging behavior, Bioenergetics, Cunner, Predation, Aquatic habitats |
| Abstract: | Density-dependent settlement, growth and mortality are often the major factors controlling recruitment success of recently-settled marine fishes. During this stage, juvenile fishes generally have spatial refuges from predation, and forage in limited but risky areas near refuges. Little is known about the mechanisms by which the tradeoff between feeding and refuge use lead to density dependent mortality. Foraging arena theory predicts that feeding activity should depend strongly on juvenile density and predation risk. Selection should act on the time that juveniles spend foraging, so as to strike a balance between growth and mortality. Because the risk of predation also varies with habitat, it is expected that variation in foraging times and resulting growth and mortality rates will be habitat-specific and density-dependent. This study tested these concepts by respirometric measurement of the metabolic cost of feeding and shelter site defense in young-of-year cunner ( Tautogolabrus adspersus ) in the northwest Atlantic. Metabolic costs were applied to time budgets measured in the field to estimate in-situ energy budgets. Contrary to expectation, time and energy spent on foraging increased as habitat complexity or conspecific density decreased. Time and energy spent on refuge defense increased with increasing predation risk (as mediated by habitat complexity) or conspecific density, highlighting the importance of refuge for a species that enters torpor at night and during the winter. Future recruitment studies should include examination of spatial habitat use by juveniles, and the behavioral and physiological mechanisms for adjusting behavior to varying food density and predation risk. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Experimental Marine Biology & Ecology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 120447405 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Testing foraging arena theory: The effects of conspecific density and habitat type on time and energy budgets of juvenile cunner. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Tupper%2C+Mark%22">Tupper, Mark</searchLink><relatesTo>1</relatesTo><i> mark.tupper@utt.edu.tt</i><br /><searchLink fieldCode="AR" term="%22Juanes%2C+Francis%22">Juanes, Francis</searchLink><relatesTo>2</relatesTo><i> juanes@uvic.ca</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Experimental+Marine+Biology+%26+Ecology%22">Journal of Experimental Marine Biology & Ecology</searchLink>. Feb2017, Vol. 487, p86-93. 8p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Foraging+behavior%22">Foraging behavior</searchLink><br /><searchLink fieldCode="DE" term="%22Bioenergetics%22">Bioenergetics</searchLink><br /><searchLink fieldCode="DE" term="%22Cunner%22">Cunner</searchLink><br /><searchLink fieldCode="DE" term="%22Predation%22">Predation</searchLink><br /><searchLink fieldCode="DE" term="%22Aquatic+habitats%22">Aquatic habitats</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Density-dependent settlement, growth and mortality are often the major factors controlling recruitment success of recently-settled marine fishes. During this stage, juvenile fishes generally have spatial refuges from predation, and forage in limited but risky areas near refuges. Little is known about the mechanisms by which the tradeoff between feeding and refuge use lead to density dependent mortality. Foraging arena theory predicts that feeding activity should depend strongly on juvenile density and predation risk. Selection should act on the time that juveniles spend foraging, so as to strike a balance between growth and mortality. Because the risk of predation also varies with habitat, it is expected that variation in foraging times and resulting growth and mortality rates will be habitat-specific and density-dependent. This study tested these concepts by respirometric measurement of the metabolic cost of feeding and shelter site defense in young-of-year cunner ( Tautogolabrus adspersus ) in the northwest Atlantic. Metabolic costs were applied to time budgets measured in the field to estimate in-situ energy budgets. Contrary to expectation, time and energy spent on foraging increased as habitat complexity or conspecific density decreased. Time and energy spent on refuge defense increased with increasing predation risk (as mediated by habitat complexity) or conspecific density, highlighting the importance of refuge for a species that enters torpor at night and during the winter. Future recruitment studies should include examination of spatial habitat use by juveniles, and the behavioral and physiological mechanisms for adjusting behavior to varying food density and predation risk. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Experimental Marine Biology & Ecology is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=120447405 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.jembe.2016.12.001 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 8 StartPage: 86 Subjects: – SubjectFull: Foraging behavior Type: general – SubjectFull: Bioenergetics Type: general – SubjectFull: Cunner Type: general – SubjectFull: Predation Type: general – SubjectFull: Aquatic habitats Type: general Titles: – TitleFull: Testing foraging arena theory: The effects of conspecific density and habitat type on time and energy budgets of juvenile cunner. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Tupper, Mark – PersonEntity: Name: NameFull: Juanes, Francis IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 02 Text: Feb2017 Type: published Y: 2017 Identifiers: – Type: issn-print Value: 00220981 Numbering: – Type: volume Value: 487 Titles: – TitleFull: Journal of Experimental Marine Biology & Ecology Type: main |
| ResultId | 1 |
