Trophic interactions of chaetognaths, larval fish, and zooplankton in the South Atlantic Bight

@article{Ct1997TrophicIO,
  title={Trophic interactions of chaetognaths, larval fish, and zooplankton in the South Atlantic Bight},
  author={Baier Ct and Jennifer E. Purcell},
  journal={Marine Ecology Progress Series},
  year={1997},
  volume={146},
  pages={43-53}
}
Chaetognaths are highly abundant carnivores in manne environments, and feed both on flsh larvae and on the same foods as flsh larvae We assessed predation by chaetognaths on wlnterspawned flsh larvae and on the planktonic food of fish larvae in February 1992, December 1992, and February 1993 off the southeastern U S coast Feeding rates of chaetognaths were calculated from gut content analysis and experimentally determined digestion rates, and combined with estimates of In sltu dens l t~es of… Expand
The e ect of predatory chaetognaths on zooplankton assemblages at the start of the spring bloom in Glacier Bay , Alaska ,
Chaetognaths are highly proli c marine worms that are second only to copepod crustaceans in terms of abundance and biomass in the world's oceans. While juvenile chaetognaths feed on small prey likeExpand
Predation on zooplankton by large jellyfish, Aurelia labiata, Cyanea capillata and Aequorea aequorea, in Prince William Sound, Alaska
TLDR
During this study, predation by medusae probably did not reduce prey availability to Age 0 sandlance, herring and walleye pollock, with diets consisting primarily of small copepods; however, medusa predation may have affected larvacean availability to age 0 pink salmon, which consume them extensively. Expand
Diet of the chaetognaths Sagitta setosa and S. elegans in relation to prey abundance and vertical distribution
TLDR
S. setosa was able to maintain a daily ration of 11 to 17 % of body weight despite a rapid decline in copepod prey abundance, and this was possible through cannibalism and intense predation on O. dioica. Expand
Chaetognaths of the United States South Atlantic Bight: Distribution, abundance and potential interactions with newly spawned larval fish
TLDR
The observed abundance and distribution data indicate that wintertime chaetognath populations in offshore waters of Onslow Bay, North Carolina have the potential to interact with recently spawned larval fish and may simultaneously act as competitors, predators, or prey. Expand
Distribution and trophic ecology of chaetognaths in the western Mediterranean in relation to an inshore–offshore gradient
TLDR
The distribution patterns and feeding ecology of chaetognaths in the Catalan Sea in relation to mesoscale features along an inshore-offshore gradient were examined andTrophic niche breadth appeared to be constant with growth. Expand
Effects of sampling and preservation on apparent feeding by chaetognaths
TLDR
Prey loss from gut contents was substantial, with as much as 50% of prey lost in tows of greater than 2 min duration, butCod-end feeding, as indicated by prey in the foregut, undigested prey, and non-prey ~ tems , was much less than prey loss. Expand
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
TLDR
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
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
Chaetognaths feed primarily on dissolved and fine particulate organic matter, not on prey: implications for marine food webs
TLDR
The role of chaetognaths should be revisited in the global ocean ecological balance, particularly with respect to vertical carbon flux, and also in predicting fishery resources. Expand
Influence of pelagic invertebrate predators on the zooplankton in the Baltic Sea and the North Sea
The annual cycle of abundance and distribution of the scyphozoan medusae Aurelia aurita and Cyanea capillata was studied in the Bornholm Basin (central Baltic Sea) in 2002. Seasonal changes in preyExpand
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Feeding of the Chaetognath Sagitta elegans Verrill
TLDR
Gut contents of a total of 11 776 specimens of Sagitta elegans sampled monthly in the Irish Sea from February 1986 to October 1987 were analysed and it was found that percentage of animals with gut contents was higher at night, and the daily feeding rate for this species ranged between 0·75 and 3·55 prey day -1 during the study period. Expand
Effects of sampling and preservation on apparent feeding by chaetognaths
TLDR
Prey loss from gut contents was substantial, with as much as 50% of prey lost in tows of greater than 2 min duration, butCod-end feeding, as indicated by prey in the foregut, undigested prey, and non-prey ~ tems , was much less than prey loss. Expand
PERCENTAGE OF STARVING NORTHERN ANCHOVY; ENGRAULISMORDAX, LARVAE IN THE SEA AS ESTIMATED BY HISTOLOGICALMETHODS
TLDR
Another approach that could provide an independent prediction of year class strength for the northern anchovy is reported, namely, esti­ mation by histological methods of the proportion of larvae in the sea showing symptoms of starva­ tion. Expand
Short-Term Mortality in Post-Emergent Larval Capelin Mallotus-Villosus .2. Importance of Food and Predator Density, and Density-Dependence
TLDR
Analysis of post-emergent larval capelin Mallotus yrlJosus density in a small embayment in eastern Newfoundland demonstrated that as sampling scales approached those relevant to the larvae the degree of positive association between microzooplankton and latvae decreased. Expand
Feeding rate of the chaetognath Sagitta enflata in nature
TLDR
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
Feeding of the chaetognaths Sagitta elegans and Sagitta setosa at different seasons in Gullmarsfjorden, Sweden
TLDR
Feeding was most intensive at night in both species except for S. setosa, which is believed to reflect differences in size and vertical distribution and contribute to the sharp decrease in numbers of S.setosa at that time. Expand
Feeding by Chaetognatha : the relation of prey size to predator size in several species
TLDR
Because chaetognaths are probably one of the main sources of predation pressure on the copepod community, both the general form of their prey-size selection and differences in this function between species should have considerable influence on the size structures of lower trophic levels. Expand
Vulnerability of larval herring (Clupea harengus pallasi) to capture by the jellyfish Aequorea victoria
TLDR
The results indicate that A. victoria is most important as a predator of herring larvae during a short period after the larvae hatch, and unfed larvae were more vulnerable to jellyfish predation than fed larvae of the same age. Expand
Temporal and geographic differences in feeding and nutritional condition of walleye pollock larvae Theragra chalcogramma in Shelikof Strait, Gulf of Alaska
TLDR
The results suggest that limiting food densities may occur during spring over spatial and temporal scales that affect feeding and growth of larval pollock. 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
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