|
Persistent Identifier
|
doi:10.18710/WQWO24 |
|
Publication Date
|
2022-05-27 |
|
Title
| Replication data for: Resource use of Crucian carp along a lake productivity gradient is related to body size, predation risk, and resource competition |
|
Author
| de Meo, Ilaria (Inland Norway University of Applied Sciences) - ORCID: 0000-0003-1433-2017 |
|
Point of Contact
|
Use email button above to contact.
de Meo, Ilaria (Inland Norway University of Applied Sciences) |
|
Description
| We provide stable isotope and gut content data for crucian carp (Carassius carassius) from 12 study lakes located in southeastern Norway. Data were collected between June and August in 2018 and 2019. The stable isotope dataset (SIA) contains nitrogen and carbon stable isotope values of 30 crucian carp for each lake. In addition, we present collected abiotic and biotic data associated with the different lakes. We also provide the total body length, body height, weight, and sex of the different fish species collected in each lake. (2022-05-19)
Article Abstract: Generalist fish species can feed on a wide resource spectrum and across trophic levels depending on resource availability and trophic interactions. Crucian carp (Carassius carassius) represents a good candidate species to investigate variation in the trophic ecology of generalist fish as it can be found in highly variable fish communities and its resource use is well documented. In this study, we explored the trophic ecology of crucian carp at the individual and population levels using stable isotope and gut content analysis. We tested if trophic resource use varied according to lake productivity, predation risk, intra- and interspecific competition, or individual fish size. We found that crucian carp resource preference was highly variable among and within lakes. In predator-free lakes, small crucian carp occurred in high densities, showed increased inter-individual specialization, and relied mainly on pelagic zooplankton. In presence of predators, large crucian carp occurred in low densities and included greater proportions of benthic macroinvertebrates in their diet. This shift in resource use was further favored in productive, shallow lakes where littoral prey were probably abundant. Resource partitioning was an important factor determining crucian carp niche use, as fish had higher trophic position in absence of other cyprinids. Crucian carp showed highly dynamic resource use and food preferences in response to variable environmental conditions. Overlooking complex diet preferences of generalist fish may lead to an oversimplification of freshwater community dynamics. (2022-05-24) |
|
Subject
| Earth and Environmental Sciences |
|
Keyword
| stable isotopes
diet analysis
trophic ecology
cyprinid
crucian carp |
|
Related Publication
| de Meo, I., Østbye, K., Kahilainen, K. K., Hayden, B., Magnus, M. & Poléo, A. B. S. (2022). Resource use of Crucian carp along a lake productivity gradient is related to body size, predation risk, and resource competition. Ecology of Freshwater Fish. doi: 10.1111/eff.12668 https://doi.org/10.1111/eff.12668 |
|
Language
| English |
|
Producer
| Inland Norway University of Applied Sciences (INN) https://eng.inn.no/ |
|
Contributor
| Data Collector : de Meo, Ilaria
Data Collector : Magnus, Marius
Project Leader : Poleo, Antonio B. S. |
|
Distributor
| Inland Norway University of Applied Sciences (Inland Norway University of Applied Sciences) https://dataverse.no/dataverse/inn |
|
Depositor
| de Meo, Ilaria |
|
Deposit Date
| 2022-05-20 |
|
Date of Collection
| Start Date: 2018-07-04 ; End Date: 2019-08-21 |
|
Data Type
| fieldwork data; stable isotope data; environmental data |
