Predatory behavior ofPhacellophora camtschatica and size-selective predation uponAurelia aurita (Scyphozoa: Cnidaria) in Saanich Inlet, British Columbia

  title={Predatory behavior ofPhacellophora camtschatica and size-selective predation uponAurelia aurita (Scyphozoa: Cnidaria) in Saanich Inlet, British Columbia},
  author={Steven W. Strand and William M. Hamner},
  journal={Marine Biology},
Predation uponAurelia aurita byPhacellophora camtschatica was studied by SCUBA divers in a fjord in British Columbia between July and September 1986. The behavior and size ofP. camtschatica affected their foraging success. Larger predators captured more and larger prey. The size and behavior of the prey also affected the probability of capture. Predators were found at densities which can affect both the size composition and the overall numbers of the prey population. 

Predation by Aequorea victoria on other species of potentially competing pelagic hydrozoans

The hydromedusa Aequorea victoria included 10 gelatinous species in its diet, comprising 10.5 % of the total number of prey items. I address the effects of this intraguild predation on densities of

A review of cnidarians and ctenophores feeding on competitors in the plankton

Predation among pelagic cnidarians and ctenophores is reviewed. The diets of semaeostome scyphomedusae and hydromedusae commonly include other gelatinous zooplanktivores. However, few species of

Chemical ecology of predator‐prey interactions in ctenophores

Two species of ctenophores coexist in the north‐east Atlantic, one (Bolinopsis infundibulum) forages on crustaceans, while the other (Beroe cucumis) feeds exclusively on the former. Some introductory

Intraguild predatory interactions between the jellyfish Cyanea capillata and Aurelia aurita

Behavior observations suggested that predators did not alter their swimming behavior during meals, and thus that feeding rates were generally handling limited rather than encounter limited, and Predators captured more prey than needed, and semi-digested prey was often discarded when fresh prey was encountered.

Life cycle of Phacellophora camtschatica (Cnidaria: Scyphozoa)

The life cycle of members of P. camtschatica is described based on laboratory observations and compared with early life history stages in the scyphomedusa Aurelia labiata.

Behavioural response of the scyphozoan jellyfish Aurelia aurita (L.) upon contact with the predatory jellyfish Cyanea capillata (L.)

Underwater manipulative experiments showed that A. aurita was highly susceptible to the tentacles of C. capillata and responded with an increased swim pulse frequency when touched at the umbrellar margin but not at the central exumbrella.

Sun-compass migration by Aurelia aurita (Scyphozoa): population retention and reproduction in Saanich Inlet, British Columbia

Observations of spawning A. aurita in these swarms suggest that sun-compass migration and aggregative behavior may have evolved to facilitate reproduction and to maintain the population within this fjord throughout the year.

Predation on pelagic coelenterates: a review

  • M. Arai
  • Environmental Science
    Journal of the Marine Biological Association of the United Kingdom
  • 2005
Coelenterates (cnidaria and ctenophores) are well recognized as predators in food webs of marine ecosystems but are less often considered as prey but may provide sources of energy comparable to better recognized prey such as arthropods.

Attraction of Aurelia and Aequorea to prey

A Aurelia aurita and Aequorea victoria were attracted to either end of the chamber if Artemia prey were present in a screened compartment, and A. aurita was shown to be attracted to water conditioned by Artemia, and to ammonium chloride added to one or other of the inflow currents.

Reproduction and life history strategies of the common jellyfish, Aurelia aurita, in relation to its ambient environment

The aims of this review are to determine the role of reproduction and life history strategies of the benthic and pelagic phases of A. aurita in governing populations of medusae, with special attention given to the dynamic interaction between A. Aurita and its surrounding physical and biological environment.



Field behavior and adaptive strategies of appendicularians (Chordata: Tunicata)

The behavior of 7 species of appendicularians from the family Oikopleuridae was observed using SCUBA in the Gulf of California and the Florida Current and strategies of predator avoidance are discussed.

The feeding behavior of Beroe ovata

Together, these two animal populations form an ecological feed-back system which affects other portions of the planktonic community and aids the predator in removing tissue from its prey, yielding maximum gain from each encounter.

Predation by Medusae on Pacific Herring (Clupea harengus pallasi) Larvae

In laboratory tests young Pacific herring (Clupea harengus pallasi) larvae were eaten by several species of hydromedusae common in coastal waters off British Columbia, including the previously

Reduction of a larval herring population by jellyfish predator.

The scyphomedusa Aurelia aurita consumes large amounts of yolk-sac herring larvae in Kiel Fjord. The decline of the larval herring population in late spring coincides with a major population growth

Interspecific Predation of Common Strait of Georgia Planktonic Coelenterates: Laboratory Evidence

Among the common pelagic coelenterates of Departure Bay, B.C., Stomotoca atra, Eutonina indicans, Aequorea victoria, and Aurelia aurita show predation on other species under laboratory conditions.

A laboratory study of predation by Aurelia aurita on larval herring (Clupea harengus): Experimental observations compared with model predictions

A model to predict predation rates was constructed from swimming speeds, sizes and densities of medusae and larvae, and capture efficiency, and fell within the range of experimental data, but tended to underestimate rates and did not account for saturation ofmedusae.

Influence of Siphonophore Behavior upon Their Natural Diets: Evidence for Aggressive Mimicry

Morphology, behavior, and diet suggest that these two species of weak swimmers attract large prey by mimicking other zooplankton.

Predatory feeding of the hydromedusae Obelia geniculata and Phialla quadrata

Clearance rates of both hydromedusae were significantly correlated with predator diameter, but independent of water temperature and prey density, while those of O. geniculata were most strongly related with the strength of the prey escape response, and showed little relation with prey size or movement rates.