Diet and Feeding Chronology of Diaphus taaningi (Myctophidae) in the Cariaco Trench

Baird, Ronald C.; Hopkins, Thomas L.; Wilson, Donald F.

doi:10.2307/1442891

Cited by 41 publications

(27 citation statements)

References 14 publications

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“…Therefore, the ISF is a more objective parameter for comparisons. In this study, the values of ISF were also in good agreement with those (~4 % of dry body wt) obtained for many species of myctophids throughout the World Ocean (Baird et al 1975, Clarke 1978, Young & Blaber 1986, Duka 1986, Kawamura & Fujii 1988, Sameoto 1988, Kozlov & Tarverdieva 1989, Oven et al 1990. Maximum values (up to -5 O/O of dry body weight; Fig.…”

Section: Chaetognathasupporting

confidence: 88%

See 1 more Smart Citation

Prey composition and daily rations of myctophid fishes in the Southern Ocean

Ea¹,

Perissinotto²,

Cd³

1996

Mar. Ecol. Prog. Ser.

209

177

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Section: Chaetognathasupporting

confidence: 88%

“…Daily rations of Diaphus taaningi in continental waters off Venezuela were 0.8% of dry body weight, assuming -3.5 h of feeding (Baird et al 1975). However, extending the feeding period to -6 h, the daily intake could be as high as 1.35% of dry body weight (Table 6).…”

Section: Daily Rationsmentioning

confidence: 99%

Prey composition and daily rations of myctophid fishes in the Southern Ocean

Ea¹,

Perissinotto²,

Cd³

1996

Mar. Ecol. Prog. Ser.

209

177

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“…The condition of approaching neutral buoyancy leads to a decrease in energy expenditure for maintenance of position and a corresponding decrease in energy expenditure for vertical ascent. The effects on vertical descent may be compensated for by the increase in mass after feeding, when myctophids consume about 0,8-4 per cent of their body weight (Baird et al 1975, Hopkins andBaird 1985). This biochemical energy-conserving mechanism is further enhanced by a physical component, termed "cycle riding", because it includes an inshore, lateral vector to vertical migration dictated by upwelling.…”

Section: Resultsmentioning

confidence: 99%

Mesopelagic fish derivatives in the southern Benguela upwelling region

Hulley¹,

Prosch²

1987

South African Journal of Marine Science

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“…Moreover, gut clearance rates in micronekton were observed to be long enough for the downward migration to have been completed before evacuation occurs (Baird et al 1975). In addition, fecal matter of mesopelagic fish show fast sinking rates (average of 1028 m d 21 ), much higher than copepod or euphausiid fecal pellets (Robison and Bailey 1981).…”

Section: Discussionmentioning

confidence: 99%

Carbon sequestration and zooplankton lunar cycles: Could we be missing a major component of the biological pump?

Hernά

Franchy

Moyano

et al. 2010

Limnology & Oceanography

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The plankton outburst during the so-called late winter bloom in subtropical waters was studied in relation to lunar illumination in the Canary Island waters. Nutrient enrichment by mixing and dust deposition promoted a bloom of phyto-and zooplankton. Mesozooplankton biomass increased as the winter mixing progressed but peaked in every full moon and decreased thereafter because of the effect of predation by interzonal diel vertical migrants (DVMs). The pattern was similar to the one described in lakes due to predation by fishes and confirms that this phenomenon is important in the sea. The estimated consumption and subsequent transport of epipelagic zooplankton biomass by DVMs after every full moon is on the order of the mean gravitational export and is an unaccounted flux of carbon to the mesopelagic zone that may play a pivotal role in the efficiency of the biological pump.Most of the research about the downward flux of carbon in the ocean has centered on the so-called gravitational flux, the transport due to the sedimentation of the particulate organic carbon production from the euphotic layer to the mesopelagic zone. In tropical and subtropical regions this flux is a low number, normally less than 10% of primary production (Karl et al. 1996). Another component of the biological pump is the so-called active flux due to the transport of carbon by vertical migrants. These organisms feed on the shallower layers of the ocean at night and return to their daytime residence at depth where they metabolize carbon or simply are eaten by other organisms. The role of these rather large organisms (mesozooplankton and micronekton) in the ocean carbon sequestration has been almost neglected. Active flux is a rather complex mechanism that involves the gut flux (Angel 1989) (the transport due to the release of feces below the mixed layer), carbon dioxide respiration (Longhurst et al. 1990), dissolved organic carbon excretion (Steinberg et al. 2000), and mortality (Zhang and Dam 1997) at depth. The few values available at present mainly based on respiration at depth indicate that the active downward carbon flux is highly variable, ranging from 4% to 70% of the gravitational flux (Herná ndez-Leó n and Ikeda 2005a). However, diel vertical migrants (DVMs) account for the control of 5-10% of the daily epipelagic zooplankton production (Hopkins et al. 1996), and this ingested food is efficiently transported downward (Pearre 2003). The consumption of epipelagic zooplankton by these organisms and their role in the fate of a bloom are at present poorly known.A way to study the biological pump in subtropical waters is to understand the development of the bloom during winter, when nutrients are present in the euphotic zone. The late winter bloom in subtropical waters is produced by cooling of the shallower layers of the ocean, eroding the thermocline and allowing a small flux of nutrients to the euphotic zone. This process promotes the increase in primary production and the growth of micro-and mesozooplankton. Atmospheric Saharan...

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Diet and Feeding Chronology of Diaphus taaningi (Myctophidae) in the Cariaco Trench

Cited by 41 publications

References 14 publications

Prey composition and daily rations of myctophid fishes in the Southern Ocean

Prey composition and daily rations of myctophid fishes in the Southern Ocean

Mesopelagic fish derivatives in the southern Benguela upwelling region

Carbon sequestration and zooplankton lunar cycles: Could we be missing a major component of the biological pump?

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