- Title
- Inter-and intra-specific trophic interactions of coastal delphinids off the eastern coast of South Africa inferred from stable isotope analysis
- Creator
- Caputo, Michelle, Bouveroux, Thibaut, Van der Bank, Megan, Cliff, Geremy, Kiszka, Jeremy J, Froneman, P William, Plön, Stephanie
- Subject
- To be catalogued
- Date
- 2022
- Type
- article
- Identifier
- http://hdl.handle.net/10962/466545
- Identifier
- vital:76745
- Identifier
- https://doi.org/10.1016/j.marenvres.2022.105784
- Description
- Dietary tracers, such as bulk stable carbon (δ13C) and nitrogen (δ15N) isotopes, can be used to investigate the trophic interactions of marine predators, which is useful to assess their ecological roles within communities. These tracers have also been used to elucidate population structure and substructure, which is critical for the better identification of management units for these species affected by a range of threats, particularly bycatch in fishing gears. Off eastern South Africa, large populations of Indo-Pacific bottlenose (Tursiops aduncus) and common dolphins (Delphinus delphis) co-occur and are thought to follow the pulses of shoaling sardines (Sardinops sagax) heading north-east in the austral winter. Here we used δ13C and δ15N to investigate the trophic interactions and define ecological units of these two species along a ≈800 km stretch of the east coast of South Africa, from Algoa Bay to the coast of KwaZulu-Natal. Common and bottlenose dolphin dietary niche overlapped by 39.7% overall in our study area, with the highest overlap occurring off the Wild Coast (40.7% at Hluleka).
- Format
- 17 pages, pdf
- Language
- English
- Relation
- Marine Environmental Research, Caputo, M., Bouveroux, T., van der Bank, M., Cliff, G., Kiszka, J.J., Froneman, P.W. and Plön, S., 2022. Inter-and intra-specific trophic interactions of coastal delphinids off the eastern coast of South Africa inferred from stable isotope analysis. Marine Environmental Research, 182, p.105784, Marine Environmental Research volume 182 number 1 1 17 2022 1879-0291
- Rights
- Publisher
- Rights
- Use of this resource is governed by the terms and conditions of the Wiley Library Online Terms of Use Statement (https://onlinelibrary.wiley.com/terms-and-conditions)
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Collections
Froneman, Pierre William (Prof)
RU DST/NRF SARChI for Marine Ecosystems and Resources
RU Department of Zoology and Entomology
SDG 14. Life Below Water
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