The role of carrion supply in the abundance of deep-water fish off California.

Few time series of deep-sea systems exist from which the factors affecting abyssal fish populations can be evaluated. Previous analysis showed an increase in grenadier abundance, in the eastern North Pacific, which lagged epibenthic megafaunal abundance, mostly echinoderms, by 9-20 months. Subsequen...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Jeffrey C Drazen, David M Bailey, Henry A Ruhl, Kenneth L Smith
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/4a7e605bb8964b5f8d1bd464bef2b3e4
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:4a7e605bb8964b5f8d1bd464bef2b3e4
record_format	dspace
spelling	oai:doaj.org-article:4a7e605bb8964b5f8d1bd464bef2b3e42021-11-18T08:10:07ZThe role of carrion supply in the abundance of deep-water fish off California.1932-620310.1371/journal.pone.0049332https://doaj.org/article/4a7e605bb8964b5f8d1bd464bef2b3e42012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23133679/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Few time series of deep-sea systems exist from which the factors affecting abyssal fish populations can be evaluated. Previous analysis showed an increase in grenadier abundance, in the eastern North Pacific, which lagged epibenthic megafaunal abundance, mostly echinoderms, by 9-20 months. Subsequent diet studies suggested that carrion is the grenadier's most important food. Our goal was to evaluate if changes in carrion supply might drive the temporal changes in grenadier abundance. We analyzed a unique 17 year time series of abyssal grenadier abundance and size, collected at Station M (4100 m, 220 km offshore of Pt. Conception, California), and reaffirmed the increase in abundance and also showed an increase in mean size resulting in a ∼6 fold change in grenadier biomass. We compared this data with abundance estimates for surface living nekton (pacific hake and jack mackerel) eaten by the grenadiers as carrion. A significant positive correlation between Pacific hake (but not jack mackerel) and grenadiers was found. Hake seasonally migrate to the waters offshore of California to spawn. They are the most abundant nekton species in the region and the target of the largest commercial fishery off the west coast. The correlation to grenadier abundance was strongest when using hake abundance metrics from the area within 100 nmi of Station M. No significant correlation between grenadier abundance and hake biomass for the entire California current region was found. Given the results and grenadier longevity, migration is likely responsible for the results and the location of hake spawning probably is more important than the size of the spawning stock in understanding the dynamics of abyssal grenadier populations. Our results suggest that some abyssal fishes' population dynamics are controlled by the flux of large particles of carrion. Climate and fishing pressures affecting epipelagic fish stocks could readily modulate deep-sea fish dynamics.Jeffrey C DrazenDavid M BaileyHenry A RuhlKenneth L SmithPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 11, p e49332 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jeffrey C Drazen David M Bailey Henry A Ruhl Kenneth L Smith The role of carrion supply in the abundance of deep-water fish off California.
description	Few time series of deep-sea systems exist from which the factors affecting abyssal fish populations can be evaluated. Previous analysis showed an increase in grenadier abundance, in the eastern North Pacific, which lagged epibenthic megafaunal abundance, mostly echinoderms, by 9-20 months. Subsequent diet studies suggested that carrion is the grenadier's most important food. Our goal was to evaluate if changes in carrion supply might drive the temporal changes in grenadier abundance. We analyzed a unique 17 year time series of abyssal grenadier abundance and size, collected at Station M (4100 m, 220 km offshore of Pt. Conception, California), and reaffirmed the increase in abundance and also showed an increase in mean size resulting in a ∼6 fold change in grenadier biomass. We compared this data with abundance estimates for surface living nekton (pacific hake and jack mackerel) eaten by the grenadiers as carrion. A significant positive correlation between Pacific hake (but not jack mackerel) and grenadiers was found. Hake seasonally migrate to the waters offshore of California to spawn. They are the most abundant nekton species in the region and the target of the largest commercial fishery off the west coast. The correlation to grenadier abundance was strongest when using hake abundance metrics from the area within 100 nmi of Station M. No significant correlation between grenadier abundance and hake biomass for the entire California current region was found. Given the results and grenadier longevity, migration is likely responsible for the results and the location of hake spawning probably is more important than the size of the spawning stock in understanding the dynamics of abyssal grenadier populations. Our results suggest that some abyssal fishes' population dynamics are controlled by the flux of large particles of carrion. Climate and fishing pressures affecting epipelagic fish stocks could readily modulate deep-sea fish dynamics.
format	article
author	Jeffrey C Drazen David M Bailey Henry A Ruhl Kenneth L Smith
author_facet	Jeffrey C Drazen David M Bailey Henry A Ruhl Kenneth L Smith
author_sort	Jeffrey C Drazen
title	The role of carrion supply in the abundance of deep-water fish off California.
title_short	The role of carrion supply in the abundance of deep-water fish off California.
title_full	The role of carrion supply in the abundance of deep-water fish off California.
title_fullStr	The role of carrion supply in the abundance of deep-water fish off California.
title_full_unstemmed	The role of carrion supply in the abundance of deep-water fish off California.
title_sort	role of carrion supply in the abundance of deep-water fish off california.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/4a7e605bb8964b5f8d1bd464bef2b3e4
work_keys_str_mv	AT jeffreycdrazen theroleofcarrionsupplyintheabundanceofdeepwaterfishoffcalifornia AT davidmbailey theroleofcarrionsupplyintheabundanceofdeepwaterfishoffcalifornia AT henryaruhl theroleofcarrionsupplyintheabundanceofdeepwaterfishoffcalifornia AT kennethlsmith theroleofcarrionsupplyintheabundanceofdeepwaterfishoffcalifornia AT jeffreycdrazen roleofcarrionsupplyintheabundanceofdeepwaterfishoffcalifornia AT davidmbailey roleofcarrionsupplyintheabundanceofdeepwaterfishoffcalifornia AT henryaruhl roleofcarrionsupplyintheabundanceofdeepwaterfishoffcalifornia AT kennethlsmith roleofcarrionsupplyintheabundanceofdeepwaterfishoffcalifornia
_version_	1718422103802249216

The role of carrion supply in the abundance of deep-water fish off California.

Ejemplares similares