Scavenging by megabenthos and demersal fish on the South Georgia slope

C Yau, Martin Collins, Philip Michael Bagley, I Everson, Imants George Priede

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

The scavenging megafauna of the South Georgia and Shag Rocks slope in the south-west Atlantic (625-1519 m) were investigated using autonomous baited camera systems. Two surveys were conducted: the first in 1997 (13 deployments) used a conventional 35 mm stills camera with a 200 J flash, whilst the second in 2000 (15 deployments) used low-light digital video cameras. The scavenging community responded rapidly to the arrival of bait on the sea floor and was dominated by stone crabs (Lithodidae) and toothfish (Dissostichus eleginoides). Stone crabs took up residence around the bait until it was consumed, with a maximum number of 108 in the field of view after four hours, The most frequently observed crab species was Paralomis formosa. Paralomis spinosissima, Neolithodes diomedea and Lithodes sp., were also observed. Toothfish were the most frequently observed scavenging fish and were seen during all but one deployment, typically making brief visits (1-2 min) to the bait, but appeared startled by the flash in the 1997 survey. Labriform swimming (sculling with the pectoral fins) was the principal form of locomotion in toothfish (0.22 body lengths (BL) sec(-1)), but they were capable of more rapid sub-carangiform (using caudal trunk and fin) motion (3 BL sec(-1)) when startled. Other scavenging fish observed included the blue-hake Antimora rostrata, grenadiers (Macrourus spp.), skates, liparids and zoarcids.

Original languageEnglish
Pages (from-to)16-24
Number of pages9
JournalAntarctic Science
Volume14
Issue number1
DOIs
Publication statusPublished - Mar 2002

Fingerprint

demersal fish
bait
baits
crab
crabs
cameras
Paralomis spinosissima
body length
fins
Neolithodes
Paralomis
Lithodes
Lithodidae
Macrouridae
Rajidae
hake
video cameras
locomotion
fish
field of view

Keywords

  • baited cameras
  • Dissostichus eleginoides
  • crabs
  • Paralomis
  • toothfish
  • south-west Atlantic
  • Deep Arabian Sea
  • baited camera
  • North East Atlantic
  • Nekton Falls
  • community
  • floor
  • assemblages
  • consumption
  • dispersal
  • carcasses

Cite this

Yau, C., Collins, M., Bagley, P. M., Everson, I., & Priede, I. G. (2002). Scavenging by megabenthos and demersal fish on the South Georgia slope. Antarctic Science, 14(1), 16-24. https://doi.org/10.1017/S0954102002000536

Scavenging by megabenthos and demersal fish on the South Georgia slope. / Yau, C ; Collins, Martin; Bagley, Philip Michael; Everson, I ; Priede, Imants George.

In: Antarctic Science, Vol. 14, No. 1, 03.2002, p. 16-24.

Research output: Contribution to journalArticle

Yau, C, Collins, M, Bagley, PM, Everson, I & Priede, IG 2002, 'Scavenging by megabenthos and demersal fish on the South Georgia slope', Antarctic Science, vol. 14, no. 1, pp. 16-24. https://doi.org/10.1017/S0954102002000536
Yau, C ; Collins, Martin ; Bagley, Philip Michael ; Everson, I ; Priede, Imants George. / Scavenging by megabenthos and demersal fish on the South Georgia slope. In: Antarctic Science. 2002 ; Vol. 14, No. 1. pp. 16-24.
@article{c0bab68f2f3f4cb98a63597361e2189f,
title = "Scavenging by megabenthos and demersal fish on the South Georgia slope",
abstract = "The scavenging megafauna of the South Georgia and Shag Rocks slope in the south-west Atlantic (625-1519 m) were investigated using autonomous baited camera systems. Two surveys were conducted: the first in 1997 (13 deployments) used a conventional 35 mm stills camera with a 200 J flash, whilst the second in 2000 (15 deployments) used low-light digital video cameras. The scavenging community responded rapidly to the arrival of bait on the sea floor and was dominated by stone crabs (Lithodidae) and toothfish (Dissostichus eleginoides). Stone crabs took up residence around the bait until it was consumed, with a maximum number of 108 in the field of view after four hours, The most frequently observed crab species was Paralomis formosa. Paralomis spinosissima, Neolithodes diomedea and Lithodes sp., were also observed. Toothfish were the most frequently observed scavenging fish and were seen during all but one deployment, typically making brief visits (1-2 min) to the bait, but appeared startled by the flash in the 1997 survey. Labriform swimming (sculling with the pectoral fins) was the principal form of locomotion in toothfish (0.22 body lengths (BL) sec(-1)), but they were capable of more rapid sub-carangiform (using caudal trunk and fin) motion (3 BL sec(-1)) when startled. Other scavenging fish observed included the blue-hake Antimora rostrata, grenadiers (Macrourus spp.), skates, liparids and zoarcids.",
keywords = "baited cameras, Dissostichus eleginoides, crabs, Paralomis, toothfish, south-west Atlantic, Deep Arabian Sea, baited camera, North East Atlantic, Nekton Falls, community, floor, assemblages, consumption, dispersal, carcasses",
author = "C Yau and Martin Collins and Bagley, {Philip Michael} and I Everson and Priede, {Imants George}",
year = "2002",
month = "3",
doi = "10.1017/S0954102002000536",
language = "English",
volume = "14",
pages = "16--24",
journal = "Antarctic Science",
issn = "0954-1020",
publisher = "Cambridge University Press",
number = "1",

}

TY - JOUR

T1 - Scavenging by megabenthos and demersal fish on the South Georgia slope

AU - Yau, C

AU - Collins, Martin

AU - Bagley, Philip Michael

AU - Everson, I

AU - Priede, Imants George

PY - 2002/3

Y1 - 2002/3

N2 - The scavenging megafauna of the South Georgia and Shag Rocks slope in the south-west Atlantic (625-1519 m) were investigated using autonomous baited camera systems. Two surveys were conducted: the first in 1997 (13 deployments) used a conventional 35 mm stills camera with a 200 J flash, whilst the second in 2000 (15 deployments) used low-light digital video cameras. The scavenging community responded rapidly to the arrival of bait on the sea floor and was dominated by stone crabs (Lithodidae) and toothfish (Dissostichus eleginoides). Stone crabs took up residence around the bait until it was consumed, with a maximum number of 108 in the field of view after four hours, The most frequently observed crab species was Paralomis formosa. Paralomis spinosissima, Neolithodes diomedea and Lithodes sp., were also observed. Toothfish were the most frequently observed scavenging fish and were seen during all but one deployment, typically making brief visits (1-2 min) to the bait, but appeared startled by the flash in the 1997 survey. Labriform swimming (sculling with the pectoral fins) was the principal form of locomotion in toothfish (0.22 body lengths (BL) sec(-1)), but they were capable of more rapid sub-carangiform (using caudal trunk and fin) motion (3 BL sec(-1)) when startled. Other scavenging fish observed included the blue-hake Antimora rostrata, grenadiers (Macrourus spp.), skates, liparids and zoarcids.

AB - The scavenging megafauna of the South Georgia and Shag Rocks slope in the south-west Atlantic (625-1519 m) were investigated using autonomous baited camera systems. Two surveys were conducted: the first in 1997 (13 deployments) used a conventional 35 mm stills camera with a 200 J flash, whilst the second in 2000 (15 deployments) used low-light digital video cameras. The scavenging community responded rapidly to the arrival of bait on the sea floor and was dominated by stone crabs (Lithodidae) and toothfish (Dissostichus eleginoides). Stone crabs took up residence around the bait until it was consumed, with a maximum number of 108 in the field of view after four hours, The most frequently observed crab species was Paralomis formosa. Paralomis spinosissima, Neolithodes diomedea and Lithodes sp., were also observed. Toothfish were the most frequently observed scavenging fish and were seen during all but one deployment, typically making brief visits (1-2 min) to the bait, but appeared startled by the flash in the 1997 survey. Labriform swimming (sculling with the pectoral fins) was the principal form of locomotion in toothfish (0.22 body lengths (BL) sec(-1)), but they were capable of more rapid sub-carangiform (using caudal trunk and fin) motion (3 BL sec(-1)) when startled. Other scavenging fish observed included the blue-hake Antimora rostrata, grenadiers (Macrourus spp.), skates, liparids and zoarcids.

KW - baited cameras

KW - Dissostichus eleginoides

KW - crabs

KW - Paralomis

KW - toothfish

KW - south-west Atlantic

KW - Deep Arabian Sea

KW - baited camera

KW - North East Atlantic

KW - Nekton Falls

KW - community

KW - floor

KW - assemblages

KW - consumption

KW - dispersal

KW - carcasses

U2 - 10.1017/S0954102002000536

DO - 10.1017/S0954102002000536

M3 - Article

VL - 14

SP - 16

EP - 24

JO - Antarctic Science

JF - Antarctic Science

SN - 0954-1020

IS - 1

ER -