Consumption of large carcasses by scavenger assemblages in the deep Arabian Sea: observations by baited camera

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51 Citations (Scopus)

Abstract

During cruise no. 118 with RV 'Sonne' to the Arabian Sea (31 March to 10 May 1997), 2 large food fall experiments were carried out in order to study the composition of the scavenging fauna of the deep western Arabian Sea. Two shark carcasses were deployed at the sea floor at 4040 and 1900 m depth and monitored by a time-lapse camera for 11 and 5 d, respectively.. At 4040 m, zoarcid fish dominated during the whole deployment period, accompanied by decapod shrimp. Decapods reached the carrion within 20 min, and during the period monitored 1 to 4 decapods regularly occurred on or near the carcass. Single zoarcids were first observed after 5 h, their number rising to 50-60 during the initial 48 h, then remaining constant at this level. At 1900 m, 3 individually identifiable deepsea stone crabs were alternately feeding on the shark carcass for most of the observation period. Fish appeared rarely and never stayed at the carcass for long. Most strikingly, giant scavenging amphipods were not observed at 1900 m and macrourids were not observed at 4040 m. Not more than 20 % of the carrion was consumed at both stations.

Original languageEnglish
Pages (from-to)139-147
Number of pages9
JournalMarine Ecology Progress Series
Volume183
Publication statusPublished - 1999

Keywords

  • deep-sea
  • scavenger
  • necrophage
  • megafauna
  • food fall
  • AMPHIPOD EURYTHENES-GRYLLUS
  • DEMERSAL FISHES
  • ATLANTIC-OCEAN
  • NORTH PACIFIC
  • FOOD-FALLS
  • INFERENCES
  • COMMUNITY
  • ABUNDANCE
  • PATTERNS
  • BEHAVIOR

Cite this

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title = "Consumption of large carcasses by scavenger assemblages in the deep Arabian Sea: observations by baited camera",
abstract = "During cruise no. 118 with RV 'Sonne' to the Arabian Sea (31 March to 10 May 1997), 2 large food fall experiments were carried out in order to study the composition of the scavenging fauna of the deep western Arabian Sea. Two shark carcasses were deployed at the sea floor at 4040 and 1900 m depth and monitored by a time-lapse camera for 11 and 5 d, respectively.. At 4040 m, zoarcid fish dominated during the whole deployment period, accompanied by decapod shrimp. Decapods reached the carrion within 20 min, and during the period monitored 1 to 4 decapods regularly occurred on or near the carcass. Single zoarcids were first observed after 5 h, their number rising to 50-60 during the initial 48 h, then remaining constant at this level. At 1900 m, 3 individually identifiable deepsea stone crabs were alternately feeding on the shark carcass for most of the observation period. Fish appeared rarely and never stayed at the carcass for long. Most strikingly, giant scavenging amphipods were not observed at 1900 m and macrourids were not observed at 4040 m. Not more than 20 {\%} of the carrion was consumed at both stations.",
keywords = "deep-sea, scavenger, necrophage, megafauna, food fall, AMPHIPOD EURYTHENES-GRYLLUS, DEMERSAL FISHES, ATLANTIC-OCEAN, NORTH PACIFIC, FOOD-FALLS, INFERENCES, COMMUNITY, ABUNDANCE, PATTERNS, BEHAVIOR",
author = "U Witte",
year = "1999",
language = "English",
volume = "183",
pages = "139--147",
journal = "Marine Ecology Progress Series",
issn = "0171-8630",
publisher = "Inter-Research",

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TY - JOUR

T1 - Consumption of large carcasses by scavenger assemblages in the deep Arabian Sea

T2 - observations by baited camera

AU - Witte, U

PY - 1999

Y1 - 1999

N2 - During cruise no. 118 with RV 'Sonne' to the Arabian Sea (31 March to 10 May 1997), 2 large food fall experiments were carried out in order to study the composition of the scavenging fauna of the deep western Arabian Sea. Two shark carcasses were deployed at the sea floor at 4040 and 1900 m depth and monitored by a time-lapse camera for 11 and 5 d, respectively.. At 4040 m, zoarcid fish dominated during the whole deployment period, accompanied by decapod shrimp. Decapods reached the carrion within 20 min, and during the period monitored 1 to 4 decapods regularly occurred on or near the carcass. Single zoarcids were first observed after 5 h, their number rising to 50-60 during the initial 48 h, then remaining constant at this level. At 1900 m, 3 individually identifiable deepsea stone crabs were alternately feeding on the shark carcass for most of the observation period. Fish appeared rarely and never stayed at the carcass for long. Most strikingly, giant scavenging amphipods were not observed at 1900 m and macrourids were not observed at 4040 m. Not more than 20 % of the carrion was consumed at both stations.

AB - During cruise no. 118 with RV 'Sonne' to the Arabian Sea (31 March to 10 May 1997), 2 large food fall experiments were carried out in order to study the composition of the scavenging fauna of the deep western Arabian Sea. Two shark carcasses were deployed at the sea floor at 4040 and 1900 m depth and monitored by a time-lapse camera for 11 and 5 d, respectively.. At 4040 m, zoarcid fish dominated during the whole deployment period, accompanied by decapod shrimp. Decapods reached the carrion within 20 min, and during the period monitored 1 to 4 decapods regularly occurred on or near the carcass. Single zoarcids were first observed after 5 h, their number rising to 50-60 during the initial 48 h, then remaining constant at this level. At 1900 m, 3 individually identifiable deepsea stone crabs were alternately feeding on the shark carcass for most of the observation period. Fish appeared rarely and never stayed at the carcass for long. Most strikingly, giant scavenging amphipods were not observed at 1900 m and macrourids were not observed at 4040 m. Not more than 20 % of the carrion was consumed at both stations.

KW - deep-sea

KW - scavenger

KW - necrophage

KW - megafauna

KW - food fall

KW - AMPHIPOD EURYTHENES-GRYLLUS

KW - DEMERSAL FISHES

KW - ATLANTIC-OCEAN

KW - NORTH PACIFIC

KW - FOOD-FALLS

KW - INFERENCES

KW - COMMUNITY

KW - ABUNDANCE

KW - PATTERNS

KW - BEHAVIOR

M3 - Article

VL - 183

SP - 139

EP - 147

JO - Marine Ecology Progress Series

JF - Marine Ecology Progress Series

SN - 0171-8630

ER -