Relations between fecal pellet volume and body size for major zooplankters of the Inland Sea of Japan

  title={Relations between fecal pellet volume and body size for major zooplankters of the Inland Sea of Japan},
  author={Shin-ichi Uye and Kohei Kaname},
  journal={Journal of Oceanography},
Measurements of fecal pellet volume together with body length/body carbon weight were made for major zooplankters of the Inland Sea of Japan. The pellet volume was highly correlated with animal body size for copepods (10 species combined), a mysid (Neomysis japonica), a larvacean (Oikopleura dioica) and a pelagic shrimp (Acetes japonicus), and a specific equation was given for each group. A single equation could describe the composite relationship between pellet volume (PV, μm3) and body carbon… 

Effects of diet on dimensions, density and sinking rates of fecal pellets of the copepod Acartia tonsa

The effects of food type and concentration on fecal pellet characteristics of the calanoid copepod Acartia tonsa were examined and an L-ratio, the fraction of pellet degradation per unit length of sinklng, was defined, which may be useful in predicting the degree of recycling of pellets within the mixed layer.

Length-weight Relationships and Chemical Composition of the Dominant Mesozooplankton Taxa/species in the Subarctic Pacific, with Special Reference to the Effect of Lipid Accumulation in Copepoda.

L-W regressions of 41 species belonging to 12 taxa that are dominant in the Oyashio region were reported, and the effects of lipid accumulation in Copepoda on their mass and chemical composition were quantified.

Attenuation of the vertical flux of copepod fecal pellets under Arctic sea ice: evidence for an active detrital food web in winter

The observations suggest that the detritivore food web prevailing under the ice of the Arctic Ocean in winter is dominated by appendicularians feeding on pellets fragmented by copepods.

Effects of the copepod community structure on fecal pellet flux in Kagoshima bay, a deep, semi-enclosed embayment

Cylindrical fecal pellets produced by calanoid copepods contribute to feces flux but the predominance of poecilostomatoids and/or cyclopoids decreases feces flux via the increase of oval pellets and fragmentation of larger cylindrical pellets.

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Taxonomic composition, size composition, standing stock, and chemical composition of mesozooplankton were determined to examine the contribution of their fecal pellets to the vertical flux of organic

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Zooplankton consumption of aggregates, such as marine snow, is an important factor in determining the efficiency of the biological carbon pump. However, the feeding rates of aggregate‐associated

Comparison of marine copepod outfluxes: nature, rate, fate and role in the carbon and nitrogen cycles.

Replacement of large copepods by small ones with eutrophication of embayments: cause and consequence

  • S. Uye
  • Environmental Science
  • 2004
Species and size compositions of the planktonic copepod community were compared between two eutrophic embayments, Tokyo Bay and Osaka Bay. Within these bays, the median body weight of the community



Length-weight relationships of important zooplankton from the Inland Sea of Japan

  • S. Uye
  • Environmental Science
  • 1982
Measurements of dry weight, carbon- and nitrogen contents together with the body length of important zooplankton from the Inland Sea of Japan were made using freshly caught specimens, and species specific regression equations were calculated for 10 species of Copepoda.

Ecological implications of fecal pellet size, production and consumption by copepods

By comparing two copepod populations it is concluded that the size distribution of feeding copepods determines the percentage of fecal matter produced which reaches the sea floor.

The effect of food concentration on fecal pellet size in marine copepods1

It is concluded that fecal pellet size produced by large copepods under conditions of low food availability are less likely to sink out of the euphotic zone than pellets produced by the same copepodunder conditions of higher food availability.

Microzooplankton standing crop in the western subtropical pacific off the Bonin Islands in winter, 1980

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Concentrations and vertical fluxes of zooplankton fecal pellets on a continental shelf

An analytic model which considers pellet production by different stage groups of the genus Paracalanus indicates that the concentration and vertical flux of pellets is a function of producer size and consumer size and abundance.

Still-water sinking velocity of fecal material from the pelagic tunicate Dolioletta gegenbauri

This study determined that fecal pellet production by pelagic tunicates should have a major impact on the relative magnitude of export of particulate organic matter from the upper mixed layer of the ocean, and examined whether sinking behavior is best described by the Stokes or inertial formulations of the force balance equation.

Sinking rates of natural copepod fecal pellets

The fact that the majority of pellets which had previously been collected in deep traps by other workers were of a size comparable to pellets from the authors' large copepods supports the contention that these larger pellets are the main ones involved in vertical flux.

Zooplankton Fecal Pellets in Aquatic Ecosystems

A growing body of evidence suggests that fecal pellets of crustacean zooplankton may provide a mechanism by which organic and inorganic materials are packaged and translocated to the deep portions of

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It is demonstrated that copepods can be highly adept at breaking up their own pellets while ingesting only a small proportion, a behaviour the authors define as “coprorhexy” and speculate on the nutritional value of such a behaviour and the possible significance of “ghost” pellets, consisting of a membrane with little or no apparent solid content.