Results 31 to 40 of about 3,654 (204)

A comparative study of populations of Ectopleura crocea and Ectopleura ralphi (Hydrozoa, Tubulariidae) from the Southwestern Atlantic Ocean [PDF]

open access: yes, 2014
Ectopleura crocea (L. Agassiz, 1862) and Ectopleura ralphi (Bale, 1884) are two of the nominal tubulariid species re-corded for the Southwestern Atlantic Ocean (SWAO), presumably with wide but disjunct geographical ranges and similar morphologies.
Ale, Ezequiel   +2 more
core   +1 more source

Morphology and distribution of a deep-water Narcomedusa (Solmarisidae) from the northeast Pacific

open access: yesScientia Marina, 2000
Specimens of Solmaris sp. (Solmarisidae, Narcomedusae) with only four tentacles were collected in the northeast Pacific. The majority were collected in Canadian Pacific waters by Tucker trawl from stations outside the 500-m contour off the west coast of ...
Mary Needler Arai   +2 more
doaj   +1 more source

Movement and storage of nematocysts across development in the nudibranch Berghia stephanieae (Valdés, 2005)

open access: yesFrontiers in Zoology, 2022
Background Intracellular sequestration requires specialized cellular and molecular mechanisms allowing a predator to retain and use specific organelles that once belonged to its prey.
Jessica A. Goodheart   +2 more
doaj   +1 more source

New record of the sea anemone Kadosactis antarctica (Carlgren, 1928): re-description of an Antarctic deep-sea sea anemone, and a discussion of its generic and familial placement [PDF]

open access: yes, 2005
Sagartiogeton antarcticus Carlgren, 1928 is an Antarctic deep-sea species of sea anemone only known from its holotype. The species has been assigned to the genera Sagartiogeton and Kadosactis, and is currently placed within the family Kadosactidae ...
López González, Pablo José   +1 more
core   +1 more source

Effects of predation by Hydra (Cnidaria) on cladocerans (Crustacea: Cladocera)

open access: yesJournal of Limnology, 2016
Planktonic cladocerans have evolved different strategies to avoid predation from vertebrates; these include changes in morphology, behavior, physiology, and/or life-history traits.
Ligia Rivera-De la Parra   +2 more
doaj   +1 more source

Diversity of Zoanthids (Anthozoa: Hexacorallia) on Hawaiian Seamounts: Description of the Hawaiian Gold Coral and Additional Zoanthids [PDF]

open access: yes, 2013
The Hawaiian gold coral has a history of exploitation from the deep slopes and seamounts of the Hawaiian Islands as one of the precious corals commercialised in the jewellery industry.
A Bertoloni   +62 more
core   +3 more sources

Microbial arms race: Ballistic "nematocysts" in dinoflagellates represent a new extreme in organelle complexity [PDF]

open access: yes, 2017
We examine the origin of harpoon-like secretory organelles (nematocysts) in dinoflagellate protists. These ballistic organelles have been hypothesized to be homologous to similarly complex structures in animals (cnidarians); but we show, using structural,
Gavelis, G.S   +9 more
core   +2 more sources

Venom system variation and the division of labor in the colonial hydrozoan Hydractinia symbiolongicarpus

open access: yesToxicon: X, 2022
Cnidarians (jellyfish, hydroids, sea anemones, and corals) possess a unique method for venom production, maintenance, and deployment through a decentralized system composed of different types of venom-filled stinging structures called nematocysts.
Anna M.L. Klompen   +2 more
doaj   +1 more source

Acontia, a Specialised Defensive Structure, Has Low Venom Complexity in Calliactis polypus

open access: yesToxins, 2023
Phylum Cnidaria represents a unique group among venomous taxa, with its delivery system organised as individual organelles, known as nematocysts, heterogeneously distributed across morphological structures rather than packaged as a specialised organ ...
Hayden L. Smith   +4 more
doaj   +1 more source

Risky foraging by Ring-billed Gulls (Larus delawarensis)

open access: yesJournal of Field Ornithology, 2022
Organisms escape consumers using a variety of behaviors and structural or physiological defenses (e.g., toxins and irritants). Portuguese men o’ war (Physalia physalis) rely on nematocysts to immobilize or kill their prey, chiefly fish, but the ...
Ryan Call, Dave Shutler
doaj  

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