Abstract
The number of Coryphaenoides (Nematonurus) armatus attracted to baits (N-peak) at depths of 2000-5000 m in the NE Atlantic Ocean is shown to vary with fish density (n km(-2)) in accordance with the equation:
N-peak = dn/x (1 - exp((-c exp (-nk) -m)x))
where c = 350, d = 4.095 x 10(-3), k = 0.0037, m = 10, x = 0.005 which predicts a dome-shaped relationship with a maximum number observed at intermediate population densities. This results from more rapid arrival of fish at high densities being offset by shorter staying times in the food-rich environment of high-density localities. Caution is advised when using attraction of fish to baited cameras as an index of stock abundance. (C) 1998 Elsevier Science B.V. All rights reserved.
Original language | English |
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Pages (from-to) | 133-137 |
Number of pages | 5 |
Journal | Fisheries Research |
Volume | 36 |
Issue number | 2-3 |
Publication status | Published - 15 Jun 1998 |
Keywords
- Macrouridae
- abundance index
- bait
- Coryphaenoides
- deep-sea
- optimal foraging
- EASTERN NORTH-ATLANTIC
- PORCUPINE SEABIGHT
- NORTHEASTERN ATLANTIC
- ASSEMBLAGE STRUCTURE
- CORYPHAENOIDES-(NEMATONURUS)-ARMATUS
- MACROURIDAE
- TRACKING
- BEHAVIOR
- PACIFIC
- SLOPE