Abstract:
:The conspicuous, red harpacticoid Metis holothuriae grows to a large size (∼600 μm length) and accounts for 29.51% of the numerical meiofaunal abundance within blooms of the toxic, benthic cyanobacterium Lyngbya majuscula. Despite this, the meiobenthic juvenile trumpeter whiting, Sillago maculata, consume M. holothuriae at only 2.16% of numerical meiofaunal biomass within simulated blooms, despite their apparent ease of predation. We compared the predation rates of copepods that had been dyed red (primarily Canuellidae and not known to be toxic) to M. holothuriae by S. maculata, to assess whether avoidance by predators is possibly a response to an aposematic signal conveyed by the colouration of the copepods and reinforced by their potential toxicity from exposure to L. majuscula. M. holothuriae were again strongly avoided, with only 6.25% of M. holothuriae consumed, whereas dyed copepods were consumed with relative alacrity, indicating that predation was not deterred by colouration alone. M. holothuriae copepodites were consumed in preference to adult individuals, supporting the idea that toxin accumulation or other factors relating to maturation might explain avoidance by benthivorous fishes.
journal_name
Mar Environ Resjournal_title
Marine environmental researchauthors
Gilby BL,Burfeind DD,Tibbetts IRdoi
10.1016/j.marenvres.2011.12.001subject
Has Abstractpub_date
2012-03-01 00:00:00pages
73-6eissn
0141-1136issn
1879-0291pii
S0141-1136(11)00165-6journal_volume
74pub_type
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