Applying a reservoir functional-zone paradigm to littoral bluegills: differences in length and catch frequency?

Reservoirs exhibit gradients in conditions and resources along the transition from lotic to lentic habitat that may be important to bluegill ecology. The lotic–lentic gradient can be partitioned into three functional zones: the riverine, transitional, and lacustrine zones. We measured catch frequenc...

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Main Authors: Nathan Ruhl, Holly DeAngelis, Abigale M. Crosby, Willem M. Roosenburg
Format: Article
Language:English
Published: PeerJ Inc. 2014-08-01
Series:PeerJ
Subjects:
Online Access:https://peerj.com/articles/528.pdf
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author Nathan Ruhl
Holly DeAngelis
Abigale M. Crosby
Willem M. Roosenburg
author_facet Nathan Ruhl
Holly DeAngelis
Abigale M. Crosby
Willem M. Roosenburg
author_sort Nathan Ruhl
collection DOAJ
description Reservoirs exhibit gradients in conditions and resources along the transition from lotic to lentic habitat that may be important to bluegill ecology. The lotic–lentic gradient can be partitioned into three functional zones: the riverine, transitional, and lacustrine zones. We measured catch frequency and length of bluegills (Lepomis macrochirus) captured along the periphery of these areas (i.e., in the littoral zone of each functional zone) for four small reservoirs in Southeastern Ohio during the summer months of three years. Catch frequency differed between zones for two reservoirs, but these differences were not observed in other years. There was no relationship between reservoir zone and either standard length or catch frequency when the data for all reservoirs were pooled, but we did observe a bimodal length distribution in all reservoirs. A combination of ecological factors including inter and intraspecific competition, predation intensity, management practices, limnology, and assemblage complexity may be mitigating bluegill distribution and abundance in reservoirs. Therefore, a functional zone (categorical) approach to understanding bluegill ecology in reservoirs may not be appropriate.
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spelling doaj.art-3f54f42af7574191921deb3d6aa6b70d2023-12-03T10:31:02ZengPeerJ Inc.PeerJ2167-83592014-08-012e52810.7717/peerj.528528Applying a reservoir functional-zone paradigm to littoral bluegills: differences in length and catch frequency?Nathan Ruhl0Holly DeAngelis1Abigale M. Crosby2Willem M. Roosenburg3Department of Biology, Rowan University, Glassboro, NJ, USADepartment of Biological Sciences, Ohio University, Athens, OH, USADepartment of Biological Sciences, Ohio University, Athens, OH, USADepartment of Biological Sciences, Ohio University, Athens, OH, USAReservoirs exhibit gradients in conditions and resources along the transition from lotic to lentic habitat that may be important to bluegill ecology. The lotic–lentic gradient can be partitioned into three functional zones: the riverine, transitional, and lacustrine zones. We measured catch frequency and length of bluegills (Lepomis macrochirus) captured along the periphery of these areas (i.e., in the littoral zone of each functional zone) for four small reservoirs in Southeastern Ohio during the summer months of three years. Catch frequency differed between zones for two reservoirs, but these differences were not observed in other years. There was no relationship between reservoir zone and either standard length or catch frequency when the data for all reservoirs were pooled, but we did observe a bimodal length distribution in all reservoirs. A combination of ecological factors including inter and intraspecific competition, predation intensity, management practices, limnology, and assemblage complexity may be mitigating bluegill distribution and abundance in reservoirs. Therefore, a functional zone (categorical) approach to understanding bluegill ecology in reservoirs may not be appropriate.https://peerj.com/articles/528.pdfBluegill Lepomis ReservoirZoneSouthern Ohio
spellingShingle Nathan Ruhl
Holly DeAngelis
Abigale M. Crosby
Willem M. Roosenburg
Applying a reservoir functional-zone paradigm to littoral bluegills: differences in length and catch frequency?
PeerJ
Bluegill
Lepomis
Reservoir
Zone
Southern Ohio
title Applying a reservoir functional-zone paradigm to littoral bluegills: differences in length and catch frequency?
title_full Applying a reservoir functional-zone paradigm to littoral bluegills: differences in length and catch frequency?
title_fullStr Applying a reservoir functional-zone paradigm to littoral bluegills: differences in length and catch frequency?
title_full_unstemmed Applying a reservoir functional-zone paradigm to littoral bluegills: differences in length and catch frequency?
title_short Applying a reservoir functional-zone paradigm to littoral bluegills: differences in length and catch frequency?
title_sort applying a reservoir functional zone paradigm to littoral bluegills differences in length and catch frequency
topic Bluegill
Lepomis
Reservoir
Zone
Southern Ohio
url https://peerj.com/articles/528.pdf
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