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NUITFRANCE - Bibliothèque - Fiche bibliographique
Bibliothèque
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Document " Mechanisms of selectivity in a nocturnal fish: a lack of active prey choice "
Type de document : |
Articles de revue scientifique |
Thème du document : |
Nuit naturelle - Sens et orientation du vivant |
Groupe biologique : |
Poissons et invertébrés aquatiques |
Auteur(s) : |
HOLZMAN R.
GENIN A.
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Date de publication : |
Octobre 2005 |
Langue : |
English/Anglais |
Nom du périodique : |
Oecologia |
Précisions : |
Volume 146. Numéro 2. Pages 329-336 |
Lien contenu/source : |
https://link.springer.com/article/10.1007%2Fs00442... |
DOI : |
10.1007/s00442-005-0205-2 |
Mots-clefs : |
Active choice
Apparent size
Encounter rate
Selectivity
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Citation courte : |
Holzman & Genin (2005) |
Citation complète (format NuitFrance) : |
HOLZMAN R. & GENIN A. (2005). Mechanisms of selectivity in a nocturnal fish: a lack of active prey choice. Oecologia. Volume 146. Numéro 2. Pages 329-336. |
Résumé du document : |
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Fish that feed on individual zooplankton usually exhibit strong selectivity for large prey. Such selectivity can result from the predator's active choice of larger prey or from differential encounter rate due to lower detectability of small prey, or both. In diurnal fishes, selectivity is thought to be determined mostly by active choice. In spite of a lack of direct observations, active choice is also considered the prevailing mechanism of prey selectivity in nocturnal fishes. Our objective was to resolve this mechanism in the highly selective, nocturnal zooplanktivorous fish Apogon annularis. Laboratory experiments indicated that the fish's encounter rate with small prey was lower than that with large prey and that its selectivity became stronger with decreasing light intensity. Feeding efficiency, defined as the ratio between feeding and encounter rates, ranged 41-89% and was positively correlated with prey size. When feeding on a mixture of prey sizes, the fish fed on each size group at a rate similar to that of its feeding on the respective size alone, indicating that selectivity in A. annularis was due to size-dependent encounter rate and differential feeding efficiency. A low visual acuity in A. annularis, as inferred from its inability to detect small prey (<0.9 mm in length), together with the low abund.
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Saisie sur NuitFrance par : |
Rosor |
Saisie sur NuitFrance en : |
Octobre 2017 |
Identifiant NuitFrance : |
NF-BIBLI-1694 |
Permalien de la fiche NuitFrance : |
http://www.nuitfrance.fr/?page=donneesdoc&partie=fiche-bibliographique&id_doc=1694 |
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