Distinguishing between the abyssal macrourids Coryphaenoides yaquinae and C. armatus from in situ photography

Alan J. Jamieson, Imants G. Priede, Jessica Craig

Research output: Contribution to journalArticle

11 Citations (Scopus)
4 Downloads (Pure)

Abstract

The scavenging fish communities at abyssal depths of the Pacific Ocean are dominated by two species of macrourids; the rough abyssal grenadier CoryphaenoidesyaquinaeIwamoto and Stein, 1974 and the abyssal grenadier C. armatus (Hector, 1875). These two species are morphologically very similar, and in the absence of physical specimens are notoriously difficult to distinguish from photographic data. In an era of increasing reliance on imaging technology in the deep sea, we provide an analysis of images of the two species from around the Pacific Rim with supplementary data from the Atlantic and Southern Oceans. Our results show that image-specific morphometric characters are inadequate to distinguish the two species. However, the way in which artificial illumination is reflected from the body is both sufficient, and consistently different to distinguish between the two species. The results are also corroborated by known geographic and bathymetric distributions. This analysis is intended to provide a reliable method of identification from deep-sea imaging systems in the absence of standard fishing techniques.
Original languageEnglish
Pages (from-to)78-85
Number of pages7
JournalDeep Sea Research Part I: Oceanographic Research Papers
Volume64
Early online date21 Feb 2012
DOIs
Publication statusPublished - Jun 2012

Fingerprint

photography
Macrouridae
image analysis
Pacific Rim
deep sea
Pacific Ocean
lighting
oceans
ocean
methodology
fishing
Coryphaenoides
Coryphaenoides armatus
in situ
fish
analysis

Keywords

  • baited camera
  • species identification
  • macrouridae
  • abyssal zone
  • Pacific Ocean

Cite this

Distinguishing between the abyssal macrourids Coryphaenoides yaquinae and C. armatus from in situ photography. / Jamieson, Alan J.; Priede, Imants G.; Craig, Jessica.

In: Deep Sea Research Part I: Oceanographic Research Papers, Vol. 64, 06.2012, p. 78-85.

Research output: Contribution to journalArticle

@article{7980536c99e24000bb1db63d7d88823b,
title = "Distinguishing between the abyssal macrourids Coryphaenoides yaquinae and C. armatus from in situ photography",
abstract = "The scavenging fish communities at abyssal depths of the Pacific Ocean are dominated by two species of macrourids; the rough abyssal grenadier CoryphaenoidesyaquinaeIwamoto and Stein, 1974 and the abyssal grenadier C. armatus (Hector, 1875). These two species are morphologically very similar, and in the absence of physical specimens are notoriously difficult to distinguish from photographic data. In an era of increasing reliance on imaging technology in the deep sea, we provide an analysis of images of the two species from around the Pacific Rim with supplementary data from the Atlantic and Southern Oceans. Our results show that image-specific morphometric characters are inadequate to distinguish the two species. However, the way in which artificial illumination is reflected from the body is both sufficient, and consistently different to distinguish between the two species. The results are also corroborated by known geographic and bathymetric distributions. This analysis is intended to provide a reliable method of identification from deep-sea imaging systems in the absence of standard fishing techniques.",
keywords = "baited camera, species identification, macrouridae, abyssal zone, Pacific Ocean",
author = "Jamieson, {Alan J.} and Priede, {Imants G.} and Jessica Craig",
year = "2012",
month = "6",
doi = "10.1016/j.dsr.2012.02.001",
language = "English",
volume = "64",
pages = "78--85",
journal = "Deep Sea Research Part I: Oceanographic Research Papers",
issn = "0967-0637",
publisher = "Elsevier Limited",

}

TY - JOUR

T1 - Distinguishing between the abyssal macrourids Coryphaenoides yaquinae and C. armatus from in situ photography

AU - Jamieson, Alan J.

AU - Priede, Imants G.

AU - Craig, Jessica

PY - 2012/6

Y1 - 2012/6

N2 - The scavenging fish communities at abyssal depths of the Pacific Ocean are dominated by two species of macrourids; the rough abyssal grenadier CoryphaenoidesyaquinaeIwamoto and Stein, 1974 and the abyssal grenadier C. armatus (Hector, 1875). These two species are morphologically very similar, and in the absence of physical specimens are notoriously difficult to distinguish from photographic data. In an era of increasing reliance on imaging technology in the deep sea, we provide an analysis of images of the two species from around the Pacific Rim with supplementary data from the Atlantic and Southern Oceans. Our results show that image-specific morphometric characters are inadequate to distinguish the two species. However, the way in which artificial illumination is reflected from the body is both sufficient, and consistently different to distinguish between the two species. The results are also corroborated by known geographic and bathymetric distributions. This analysis is intended to provide a reliable method of identification from deep-sea imaging systems in the absence of standard fishing techniques.

AB - The scavenging fish communities at abyssal depths of the Pacific Ocean are dominated by two species of macrourids; the rough abyssal grenadier CoryphaenoidesyaquinaeIwamoto and Stein, 1974 and the abyssal grenadier C. armatus (Hector, 1875). These two species are morphologically very similar, and in the absence of physical specimens are notoriously difficult to distinguish from photographic data. In an era of increasing reliance on imaging technology in the deep sea, we provide an analysis of images of the two species from around the Pacific Rim with supplementary data from the Atlantic and Southern Oceans. Our results show that image-specific morphometric characters are inadequate to distinguish the two species. However, the way in which artificial illumination is reflected from the body is both sufficient, and consistently different to distinguish between the two species. The results are also corroborated by known geographic and bathymetric distributions. This analysis is intended to provide a reliable method of identification from deep-sea imaging systems in the absence of standard fishing techniques.

KW - baited camera

KW - species identification

KW - macrouridae

KW - abyssal zone

KW - Pacific Ocean

U2 - 10.1016/j.dsr.2012.02.001

DO - 10.1016/j.dsr.2012.02.001

M3 - Article

VL - 64

SP - 78

EP - 85

JO - Deep Sea Research Part I: Oceanographic Research Papers

JF - Deep Sea Research Part I: Oceanographic Research Papers

SN - 0967-0637

ER -