Vertical distribution of pelagic chaetognaths and feeding of Sagitta enflata in the Central Equatorial Pacific

  title={Vertical distribution of pelagic chaetognaths and feeding of Sagitta enflata in the Central Equatorial Pacific},
  author={Makoto Terazaki},
  journal={Journal of Plankton Research},
  • M. Terazaki
  • Published 1996
  • Biology
  • Journal of Plankton Research
The vertical distribution and feeding of pelagic chaetognaths at 5°S, 160°W in the Central Equatorial Pacific were investigated using a series of 0-500 m vertical hauls with a VMPS net over a 24 h period between 6 and 7 October 1990. The total number of individuals per haul was between 370 and 688. Fourteen species in four genera were found at this station. The most abundant species was Sagina enflata which comprised 32.4-61.1 % of the individuals collected from the 0-500 m layer. Mesopelagic… Expand
Feeding of Sagitta enflata and vertical distribution of chaetognaths in relation to low oxygen concentrations
Gut content analyses demonstrated that predation was principally focused on small copepod (<1500 μm), with greatest feeding activity occurring at night, and chaetognaths may strongly influence the abundance and size distribution of copepods in coastal upweelling ecosystems. Expand
Diel vertical migration and feeding of chaetognaths in coastal waters of the eastern Mediterranean
In order to coexist in an area of low productivity the chaetognath species follow the basic ecological rules of space, time and food-type separation, in order to reduce the inter- and intra-specific competition. Expand
Quantitative aspects of feeding of chaetognaths in the eastern Mediterranean pelagic waters
  • George Kehayias
  • Biology
  • Journal of the Marine Biological Association of the United Kingdom
  • 2003
The diet of all chaetognath species found in a broad pelagic area of the eastern Mediterranean was investigated through gut content analysis. Eight chaetognath species were recovered from four depthExpand
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Abstract The composition, and the temporal vertical and horizontal distribution of chaetognaths off Concepcion Bay, Chile were analyzed from 15 oceanographic stations along three sectionsExpand
Diel vertical migration and feeding of three species of chaetognaths (Flaccisagitta enflata, Aidanosagitta delicata and Aidanosagitta neglecta) in two shallow, subtropical bays in Hong Kong
Although copepods were the most abundant component of the mesozooplankton, they were not preferred prey of chaetognaths and Larvaceans, on the other hand, were highly preferred, with predation impact as high as .30%. Expand
On the variability of the chaetognath Sagitta friderici Ritter-Zàhony at Cananéia Lagoon Estuarine system, São Paulo, Brazil
During the low-salinity period of February and March, higher abundance was found when salinity was higher, but from May to January abundance did not show consistent pattern in relation to time of day and tidal cycle, and seasonal variation in total body length was related to temperature variations. Expand
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Relationship between spatial distribution of chaetognaths and hydrographic conditions around seamounts and islands off Northeastern Brazil were analyzed and F. enflata, an epiplanktonic species, increased, associated with greater water-column stability. Expand
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The phylum chaetognatha consists of some 100 species arranged in 22 genera and has been estimated as 10–30 per cent of that of copepods in the world oceans, so that they are of great significance. Expand
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Water depth and season were the principal determinants of abundance and species composition patterns, indicating vertical seasonal migration and vertical segregation of species. Expand


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Seven species of two genera of pelagic chaetognaths were collected at Ocean Station P from February 1980 to January 1981 and both E. hamata and S. elegans had three spawning periods during the year, separated by distinct gaps in both presence of mature individuals and appearance of new juveniles. Expand
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The geographic extents of 27 species of Chaetognatha in the Pacific have been inferred from analyses of 2,900 plankton samples taken at more than 900 stations, with sharpest chaetognath boundary yet found in the Eastern Pacific at 18° to 20° N. Lat. Expand
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Abstract The horizontal and vertical distribution and diel migration of chaetognaths were investigated in the Kuroshio warm-core ring (KWCR) and adjacent waters during two cruises in August andExpand
Feeding rate of the chaetognath Sagitta enflata in nature
The relationships of the NP ratios of planktonic organisms, their food, and their excretion products may be a consistent feature of marine ecosystems, and may help to explain some aspects of nutrient cycling. Expand
Daily ration and specific daily ration of the chaetognath Sagitta enflata
Digestion times, obtained directly from laboratory feeding, were used in conjunction with a day/night series of field samples to estimate the daily ration and specific daily ration of Sagitta enflataExpand
The Chaetognatha Community of the Agulhas Current: Its Structure and Related Properties
An objective technique was used to identify and study related groups of chaetognath species from the Southwest Indian Ocean off the coast of the Republic of South Africa, finding the most representative groups were from the data of the N70V—nets which formed 3 groups. Expand
Vertical Migration and Feeding in Sagitta Elegans Verrill
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Feeding of Zooplankton, with Special Reference to Some Experiments with Sagitta
THE chaetognaths have long been known as active carnivores1, though knowledge of their feeding behaviour is limited to qualitative observations on the nature of their food, and mode of operation ofExpand