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Physical characteristics of persistent deep-water spawning sites of capelin: Importance for delimiting critical marine habitats
Penotn, P.M.; Davoren, G.K. (2012). Physical characteristics of persistent deep-water spawning sites of capelin: Importance for delimiting critical marine habitats. Mar. Biol. Res. 8(8): 778-783. dx.doi.org/10.1080/17451000.2012.678858
In: Marine Biology Research. Taylor & Francis: Oslo; Basingstoke. ISSN 1745-1000; e-ISSN 1745-1019, meer
Peer reviewed article  

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Trefwoorden
    Bathymetrie; Hot spots; Kuit schieten, Paaien; Sediment size; Temperatuur; Mallotus villosus (Müller, 1776) [WoRMS]; Marien
Author keywords
    Biological hotspot; Capelin

Auteurs  Top 
  • Penotn, P.M.
  • Davoren, G.K.

Abstract
    In coastal Newfoundland, high abundances of top predators aggregate (biological hotspots) over deep-water (demersal) spawning sites of capelin (Mallotus villosus), the focal forage fish on which most top predators rely for prey. We explore the mechanisms underlying the spatial persistence of hotspot formation by investigating physical characteristics associated with the persistent use of demersal spawning sites of capelin on the northeast Newfoundland coast from 2003 to 2010. The continued presence of suitable spawning sediment (0.5–16 mm) in permanent bathymetric depressions was a key determinant of site use persistence, whereas minimum temperature (~2°C) influenced the use of sites with suitable sediments. We suggest that biological hotspots associated with demersal spawning sites with similar physical characteristics could be used to delineate critical marine habitats for protection throughout the circumpolar distribution of this key forage fish species.

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