Feeding strategies of some demersal fishes of the continental slope and rise off the Mid-Atlantic Coast of the USA

Sedberry, George R.; Musick, John A.

doi:10.1007/bf00390900

Cited by 110 publications

(76 citation statements)

References 26 publications

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“…A current analysis of the diet of Centroscymnus coelolepis (Carrasson et al 1992), the only shark abundant on the lower slope, has revealed the practical non-existence of carrion remains. This is in sharp contrast to findings in the North Atlantic (Clarke & Merrett 1972, Sedberry & Musick 1978, Mauchline & Gordon 1983) and could serve as evidence in favour of the hypothesis of Mahaut et al (1990).…”

Section: Within-species Patterncontrasting

confidence: 99%

“…Greater mobility and the consequent increased ability to catch pelagic prey and feed on widely dispersed corpses (cf. Haedrich 1974, Haedrich & Henderson 1974, Pearcy 1976, Sedberry & Musick 1978, along with decreased metabolic cost per unit weight and a higher nutrient storage capacity (Peters 1983), would all play an important role.…”

Section: Within-species Patternmentioning

confidence: 99%

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Depth-size trends in western Mediterranean demersal deep-sea fishes

Stefanescu¹,

Rucabado²,

Lloris³

1992

Mar. Ecol. Prog. Ser.

107

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We analyze the bathymetric trends of demersal deep-sea flshes in the Catalan Sea ( N W Medlterranean) between 1000 and 2250 m depth In the first part of the study, only the pattern shown by the whole fauna ( wthin-fauna pattern ) 1s considered At 1200 m there is a significant decrease In fish mean welght, as a consequence of the replacement of the dominant large or medium-sized specles by small ones This fauna1 shift may be a consequence of the lower trophic availability at greater depths, as shown by an important decrease in megafaunal biomass between 1000 and 2250 m In the second part, the study focuses on the depth-size trends of the most common species ( within-species pattern ) Results show that the bigger-deeper phenomenon is not a well-estabhshed tendency None of the lower slope species and only 2 of the 5 middle slope species analyzed behave as bigger-deeper species Moreover some specles which display a bigger-deeper trend in North Atlantic waters do not show any significant trend In the Medlterranean Considering the recent Atlantic origin of Mediterranean ichthyofauna and the contrasting behaviour in the 2 areas, the hypothesis that mean slze increase with depth is the result of inhented ontogenic behaviour can be discarded

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Section: Within-species Patterncontrasting

confidence: 99%

Section: Within-species Patternmentioning

confidence: 99%

Depth-size trends in western Mediterranean demersal deep-sea fishes

Stefanescu¹,

Rucabado²,

Lloris³

1992

Mar. Ecol. Prog. Ser.

107

View full text Add to dashboard Cite

show abstract

“…comm.). This fact again indicates the importance of vertically migrating species to the food web over the continental slope (Sedberry and Musick 1978) and the shelf. E. lucens is much more common on the West Coast than the South (Pillar 1986), and therefore its greater abundance in West Coast predator stomachs is to be expected.…”

Section: Discussionmentioning

confidence: 81%

Predation patterns of demersal teleosts from the Cape south and west coasts of South Africa. 2. Benthic and epibenthic predators

Meÿer¹,

Smale²

1991

South African Journal of Marine Science

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“…Hinga et al 1979). Active transport between the deep sea floor and the overlying water column has been suggested since pelagic prey are present in the stomachs of benthopelagic fishes (Haedrich and Henderson 1974;Pearcy and Ambler 1974;Sedberry and Musick 1978;Merrett and Marshall 198 1). The capture of some of these presumably benthic fishes at distances as great as 1,000 m above the bottom (Haedrich 1974;Pearcy 1976;Smith et al 1979b; K. Smith unpubl.…”

Section: Discussionmentioning

confidence: 99%

Food energy supply and demand: A discrepancy between particulate organic carbon flux and sediment community oxygen consumption in the deep ocean1

Smith¹

1987

Limnology & Oceanography

182

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Sediment community oxygen consumption (SCOC) and particulate organic carbon (POC) flux to the benthic boundary layer were concurrently measured at five deep-sea stations on a transect across the eastern and central North Pacific at various times of year. A free vehicle grab respirometer and Alvin-manipulated grab respirometer were used to measure SCOC. Paired particle interceptor traps (PITS) were used to collect sedimenting small POC at 100 and 600 m above the bottom. SCOC decreased across the transect from the eutrophic coastal areas off southern California to the oligotrophic central Pacific gyre. These rates were generally highest in June and lowest between fall and early spring across the transect with a recurrent pattern in the magnitude of rates measured during the same months but different years. Flux of POC into the benthic boundary layer decreased across the transect from the eutrophic eastern to the oligotrophic central Pacific. No consistent temporal trends were evident in POC flux across the transect, possibly because of small sample sizes, high intra-station variability, and short-term deployments (57 d). Comparison of concurrently measured supply of POC with organic carbon demand of the sediment community as estimated from SCOC reveals a supply deficit across the transect for all seasons measured. For one nearly synoptic sampling period across the transect in June 1982, the supply-to-demand ratio is lowest at the two nearshore stations where current speeds are highest. A predictive equation for SCOC with a least-squares regression analysis and log-transformed data revealed that POC flux as the independent variable accounted for only 59% of the variability in SCOC. Direct coupling between SCOC and POC flux is not confirmed by these results, which may be attributed to the limitations of the measurements or other organic carbon sources.Sediment community oxygen consumption (SCOC) has been measured at various times of year at five deep sea stations on a transect across the eastern and central North Pacific (CNP-ENP transect) over the past 8 yr. Initial results indicated spatial variability in SCOC which increased along a gradient of increasing surface water primary productivity from the oligotrophic central gyre to the more eutrophic coastal upwelling areas off southern California . Temporal variability was also identified in SCOC at two of the transect stations and appeared related to the seasonal productivity of the overlying water (Smith and Baldwin 1984a). This result is not surprising given recent reports of seasonal fluctuations in the fluxes of small organic particles to abyssal depths (Deuser and Ross 1980; l This research was supported by NSF grants OCE 81-17661, OCE 84-09075, and OCE 84-17913 and a contract from Sandia Laboratories. Deuser et al. 198 1;Honjo 1982;Billett et al. 1983;Cole et al. 1985)-a source of food supply for deep sea benthos. The next logical step is to explore the possible coupling between this food supply from the overlying water column and the food demand of...

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Feeding strategies of some demersal fishes of the continental slope and rise off the Mid-Atlantic Coast of the USA

Cited by 110 publications

References 26 publications

Depth-size trends in western Mediterranean demersal deep-sea fishes

Depth-size trends in western Mediterranean demersal deep-sea fishes

Predation patterns of demersal teleosts from the Cape south and west coasts of South Africa. 2. Benthic and epibenthic predators

Food energy supply and demand: A discrepancy between particulate organic carbon flux and sediment community oxygen consumption in the deep ocean1

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