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NUITFRANCE - Bibliothèque - Fiche bibliographique
Bibliothèque
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Document " Potential effects of artificial light associated with anthropogenic infrastructure on the abundance and foraging behaviour of estuary-associated fishes "
Type de document : |
Articles de revue scientifique |
Thème du document : |
Nuit menacée - Lumière artificielle - Impacts généraux sur la biodiversité |
Groupe biologique : |
Poissons et invertébrés aquatiques |
Auteur(s) : |
BECKER A.
WHITFIELD A.K.
COWLEY P.D.
JÄRNEGREN J.
NAESJE T.F.
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Date de publication : |
Février 2013 |
Langue : |
English/Anglais |
Nom du périodique : |
Journal of applied ecology |
Précisions : |
Volume 50. Numéro 1. Pages 43–50 |
Lien contenu/source : |
http://onlinelibrary.wiley.com/doi/10.1111/1365-26... |
DOI : |
10.1111/1365-2664.12024 |
Mots-clefs : |
Artificial lighting
Didson
Predators
Schooling
South Africa
Urbanization
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Citation courte : |
Becker et al. (2013) |
Citation complète (format NuitFrance) : |
BECKER A., WHITFIELD A.K., COWLEY P.D., JÄRNEGREN J. & NAESJE T.F. (2013). Potential effects of artificial light associated with anthropogenic infrastructure on the abundance and foraging behaviour of estuary-associated fishes. Journal of applied ecology. Volume 50. Numéro 1. Pages 43–50. |
Résumé du document : |
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1. Urbanization has been identified as a global threat to biodiversity. Human population growth in coastal areas, including estuaries, is expected to increase considerably in coming decades, which will result in a proliferation of infrastructure such as jetties, wharfs and marinas. This infrastructure is often associated with artificial night lighting, yet the implications of these unnatural lighting regimes for the fish fauna in coastal ecosystems are unknown.
2. We conducted novel, night-time surveys of the fish community directly adjacent to an artificial structure using an acoustic camera (didson). By manipulating the artificial lighting conditions (lighting either ‘on’ or ‘off’), we tested the effects of artificial light on fish abundance and behaviour.
3. Clear differences in the abundance of fish were observed between the two light treatments. The occurrence of large-bodied predators (>500 mm TL) increased when the artificial lights were on. The behaviour of these fish also differed as they attempted to maintain their position within the illuminated area adjacent to the associated anthropogenic structure. The abundance of small shoaling fish also increased when the lights were on.
4. It is possible that the conditions created by artificial lighting benefit piscivores through the concentration of prey and enhanced foraging capabilities in the case of visual predators. This has the potential to create unnatural top–down regulation of fish populations within urban estuarine and coastal waters.
5. Synthesis and applications. As a consequence of a positive phototaxic response, the findings of this study suggest that artificial light often associated with man-made structures has the potential to alter fish communities within urban estuarine ecosystems by creating optimal conditions for predators. Future coastal developments should consider the ecological implications of lighting on aquatic communities. We recommend that lighting be minimized around coastal infrastructure and the use of red lights, which have limited penetration though water, be considered.
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Saisie sur NuitFrance par : |
Rosor |
Saisie sur NuitFrance en : |
Septembre 2014 |
Identifiant NuitFrance : |
NF-BIBLI-495 |
Permalien de la fiche NuitFrance : |
http://www.nuitfrance.fr/?page=donneesdoc&partie=fiche-bibliographique&id_doc=495 |
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