Abyssopelagic fauna in the central North Pacific: comparison of acoustic detection and trawl and baited trap collections to 5800 m

Smith, Kenneth L.; Kaufmann, Ronald S.; Edelman, J.L.; Baldwin, R.J.

doi:10.1016/0198-0149(92)90094-a

Cited by 25 publications

(8 citation statements)

References 48 publications

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“…Some carrion was identified because it consisted of animals (Brodeur et al 2003); and Pacific hake, M. productus. Pacific hake have a depth range extending to 1000 m (Miller and Lea 1972), but this is not deep enough to encounter the macrourids, even when considering that these species may migrate as much as 1000 m above bottom (Smith et al 1992). Many squid species have poorly documented vertical ranges, but broadly gonatids, cranchiids, and onychoteuthids occupy the upper 2000 m of the water column or less (Roper et al 1984;Nesis 1997).…”

Section: Resultsmentioning

confidence: 99%

“…M). For a complete description of the physical and biological characteristics of this station see Smith and Druffel (1998). In brief, this site is located 220 km west of Point Conception, California, on the Monterey Abyssal Fan, and lies underneath the California Current.…”

Section: Methodsmentioning

confidence: 99%

“…As a result, the populations of these abyssal fishes are weakly linked to benthic community dynamics and more strongly linked to processes affecting the epipelagic nekton. Previous work has focused on linking benthic community dynamics to climate processes that affect phytodetrital flux (Smith and Kaufmann 1999;Ruhl and Smith 2004;Bailey et al 2006). Changes in surface water productivity that influence phytodetrital flux will affect the entire epipelagic ecosystem through bottom-up forcing.…”

Section: Potential Preymentioning

confidence: 99%

“…These two species are thought to compose the top trophic position in the food web at an abyssal station (Sta. M) where the benthic ecosystem has been studied extensively (Smith and Druffel 1998). It was hypothesized that the shifts in their abundance resulted from migrations in response to regional changes in food supply.…”

mentioning

confidence: 99%

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Bypassing the abyssal benthic food web: Macrourid diet in the eastern North Pacific inferred from stomach content and stable isotopes analyses

Drazen

Popp

Choy

et al. 2008

Limnology & Oceanography

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Deep‐sea fishes prey on benthic fauna and scavenge on the carcasses of surface‐living animals. Few studies have addressed the relative importance of each trophic pathway. Recent documentation of inter‐decadal fluctuations in macrourid densities in the abyssal Pacific, related to changing food supplies, hastens the need for information. We conducted stomach content and stable isotope analyses of two abyssal macrourids, carrion sources, and benthic prey, collected concurrently at 4100 m off California. Squid and fishes were the most frequent prey for Coryphaenoides armatus, with small crustaceans numerous in the diet of small specimens. The diet of Coryphaenoides yaquinae included more benthic prey such as crustaceans, polychaetes, and the holothuroid Protankyra brychia. Carrion was present in both species and it was 69% of the mass of food of large C. armatus. Carrion δ15N values were comparable to those in abyssal deposit feeders, but carrion was relatively enriched in 13C, giving it a unique isotopic signature compared to benthic prey sources. The highest δ13C and δ15N values were observed in benthic shrimps and large polychaetes. The two macrourids had intermediate values, with C. armatus having slightly but significantly lower δ15N relative to C. yaquinae. Results of isotope mass balance suggest that carrion was the most important prey resource for both species but to a lesser extent in C. yaquinae. These two species bypass the conventional phytodetritus‐based abyssal food web for much of their nutrition. Their population dynamics may be tied more closely to fluctuations in epipelagic nekton populations through fishing effects and direct climatic forcing on top trophic levels.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Potential Preymentioning

confidence: 99%

mentioning

confidence: 99%

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Bypassing the abyssal benthic food web: Macrourid diet in the eastern North Pacific inferred from stomach content and stable isotopes analyses

Drazen

Popp

Choy

et al. 2008

Limnology & Oceanography

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“…The existence of necrophages in the deep sea was demonstrated, using baited traps, more than 100 years ago (CHEVREUX, 1900;RICHARD, 1934). Subsequent investigations, using baited traps and cameras, have shown that necrophages, mainly amphipods and fish, are present throughout the deep sea (see, for example, HESSLER et al, 1972;ISAACS and SCHWARTZLOSE, 1975;DESBRUYERES et al,, 1985;THURSTON, 1990THURSTON, , 1995PRIEDE et al, 1990, ARMSTRONG et al, 1992SMITH et al, 1992). They swim up-current to food falls (THURSTON, 1979) and frequently show cyclical peaks of abundance which may correspond with tidal variations of amplitude and direction of near-bottom currents (GUENNE- GAN and RANNOU, 1979;.…”

Section: Introductionmentioning

confidence: 99%

Abyssal Megafaunal Necrophages: Latitudinal Differences in the Eastern North Atlantic Ocean

Thurston

Bett

Rice

1995

Intl Review of Hydrobiology

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A pop-up time-lapse camera system (BATHYSNACK) was used to study megafaunal organisms attracted to bait at three abyssal localities in the eastern North Atlantic Ocean, a northern site on the Porcupine Abyssal Plain and two sub-tropical sites on the Madeira Abyssal Plain. Fish and decapod crustaceans appeared on 47 % of photographs taken during deployments of up to seven days duration. The fishes Coryphaenoides (Nematonunis) armatus and Pachycarci bsilbiceps and the decapod Munidopsis spp. dominated appearances at the northern locality whereas over 95 5% of records at the two subtropical localities were of the decapod Plesiopencieus nrmntus.Cyclical variations in necrophage abundance did not correlate with tidal cycles of near-bottom currents, although high F? nnnntus numbers were inversely related to current speed. Most of the frequently recorded entities showed contagious intraspecific distributions. In contrast, many of the interspecies relationships were non-random, with co-occurrences lower than expected. probably as a result of physical disturbance or potential predation. Population densities based on times of first arrival were calculated. Assemblages dominated by fish at higher latitudes and crustaceans at lower latitudes are discussed in terms of organic carbon supply to the deep sea and pelagic community structures.

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Hatchling Size and Aspects of Biology in the Deep‐Sea Amphipod Genus Eurythenes (Crustacea: Amphipoda)

Thurston

Bett

1995

Intl Review of Hydrobiology

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Records attributed to Eurythenes gryllus are discussed in the light of described morphological variation, and the existence of a third species in the genus is postulated. The presence of five pairs of oostegites in E. gryllus, a character almost unique among the Amphipoda, is confirmed. Brooding females of E. gryllus and E. obesus, captured in deep midwater hauls in the eastern North Atlantic Ocean, are reported for the first time. The 120 mm E. gryllus female carried 237 hatchlings (mean length 11.13 mm) and the 48 mm E. obesus female 47 hatchlings (mean length 7.99 mm). Hatchlings showed variability in size and bodily proportion, and measurements of individual body segments could not be used to predict overall length. Despite this variability, no evidence for more than one instar was found. The hatchlings of E. gryllus are established as a hitherto unrecognized instar in this species. Egg size for E. gryllus and E. obesus is predicted. The biological consequences of the absolute and relative size of hatchling in the two species, and the depths of capture of the E. gryllus female, are discussed.

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Abyssopelagic fauna in the central North Pacific: comparison of acoustic detection and trawl and baited trap collections to 5800 m

Cited by 25 publications

References 48 publications

Bypassing the abyssal benthic food web: Macrourid diet in the eastern North Pacific inferred from stomach content and stable isotopes analyses

Bypassing the abyssal benthic food web: Macrourid diet in the eastern North Pacific inferred from stomach content and stable isotopes analyses

Abyssal Megafaunal Necrophages: Latitudinal Differences in the Eastern North Atlantic Ocean

Hatchling Size and Aspects of Biology in the Deep‐Sea Amphipod Genus Eurythenes (Crustacea: Amphipoda)

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