Results 51 to 60 of about 12,958 (221)

Let's Get to the Bottom of the Arctic! [PDF]

In this lesson students investigate benthic communities in the deep Arctic Ocean to determine the factors that influence their compositions. As a result of this activity, students will be able to identify the three realms of the Arctic Ocean and describe

core   +1 more source

Neurotransmitters of sleep and wakefulness in flatworms

Sleep, 2022
Abstract Study Objectives Sleep is a prominent behavioral and biochemical state observed in all animals studied, including platyhelminth flatworms. Investigations into the biochemical mechanisms associated with sleep—and wakefulness—are important for understanding how these states are regulated and ...
Shauni E T Omond, Matthew W Hale, John A Lesku   +2 more
openaire   +2 more sources

The Embryonic Development of the Cotylean Polyclad Phrikoceros jannetae

Acta Zoologica, EarlyView.
ABSTRACT Polyclads exhibit distinct developmental modes ranging from direct to indirect development, with several transitional stages also recognised. The existence of an indirect developmental mode in polyclads with a planktonic life history stage in the form of a free‐swimming larva is unique among all free‐living flatworms and makes polyclads a ...
Mehrez Gammoudi, Bernhard Egger, Isabel L. Dittmann, Verónica N. Bulnes, Pavel Tomancak, Abdel Halim Harrath, Johannes Girstmair   +6 more
wiley   +1 more source

Sex-Biased Expression of MicroRNAs in Schistosoma mansoni [PDF]

, 2013
Schistosomiasis is an important neglected tropical disease caused by digenean helminth parasites of the genus Schistosoma. Schistosomes are unusual in that they are dioecious and the adult worms live in the blood system.
A Kozomara, A Marco, A Marco, A Marco, Aidan M. Emery, Ana Kozomara, Antonio Marco, AV Protasio, B Gryseels, B Vicoso, B Vicoso, CC Copeland, CD Criscione, David Rollinson, DP Bartel, ES Loker, G-F Cheng, G-Z Luo, H Ellegren, J Huang, J Utzinger, Jerome H. L. Hui, JHL Hui, JM Fitzpatrick, KF Hoffmann, KF Hoffmann, L Hao, LX Garmire, M Berriman, M Cucher, M De Souza Gomes, M Gallach, M Parisi, M Pröschel, M-J Xu, Malcolm K. Jones, Matthew Ronshaugen, MC Simões, MD Robinson, P Cai, P Cai, P Steinmann, PF Basch, S Gomes M de, Sam Griffiths-Jones, SF Altschul, SP Lawton, TM Lowe, WP Kloosterman, X Jin, X Piao, X Xue, Y-C Lu, Y-F Qin, Z Wang   +54 more
core   +9 more sources

Do Not Lose Your Head over the Unequal Regeneration Capacity in Prolecithophoran Flatworms

Biology, 2022
One of the central questions in studying the evolution of regeneration in flatworms remains whether the ancestral flatworm was able to regenerate all body parts, including the head.
Alexandra L. Grosbusch, Philip Bertemes, Bob Kauffmann, Clemens Gotsis, Bernhard Egger   +4 more
doaj   +1 more source

Evolutionary history of the Tricladida and the Platyhelminthes: an up-to-date phylogenetic and systematic account [PDF]

, 2012
Within the free-living platyhelminths, the triclads, or planarians, are the best-known group, largely as a result of long-standing and intensive research on regeneration, pattern formation and Hox gene expression.
Lázaro, Eva, Paps, Jordi, Riutort, Marta, Sol, Eduard, Álvarez-Presas, Marta   +4 more
core   +2 more sources

Pejerrey (Odontesthes bonariensis) Under Siege: Main Infectious Diseases and Their Role in Aquaculture and Wild Populations Amidst Environmental Change

Journal of Fish Diseases, Volume 48, Issue 4, April 2025.
ABSTRACT The pejerrey (Odontesthes bonariensis) is a key species for recreational and commercial fisheries in Argentina and holds significant aquaculture potential. It has been introduced to various countries worldwide, including Japan, where intensive aquaculture has developed.
Aarón Torres‐Martínez, Miguel Mancini, Fabian Grosman, Gustavo Manuel Somoza, Carlos Augusto Strüssmann   +4 more
wiley   +1 more source

Structural Characterization and Spatial Mapping of Tetrodotoxins in Australian Polyclads

Marine Drugs, 2022
Tetrodotoxin (TTX) is a potent marine neurotoxin that occurs in several Australian phyla, including pufferfish, toadfish, gobies, and the blue-ringed octopus.
Justin M. McNab, Matthew T. Briggs, Jane E. Williamson, Peter Hoffmann, Jorge Rodriguez, Peter Karuso   +5 more
doaj   +1 more source

Zoology: War of the Worms [PDF]

, 2016
The phylogenetic affinities of Xenacoelomorpha - the phylum comprising Xenoturbella bocki and acoelomorph worms - are debated. Two recent studies conclude they represent the earliest branching bilaterally symmetrical animals, but additional tests may be ...
Copley, RR, Telford, MJ
core   +1 more source

Circadian regulation of reproduction and neoblast cell division in the catenulid flatworm Stenostomum virginianum (Platyhelminthes)

Photochemistry and Photobiology, EarlyView.
The circadian clock and melatonin coordinate homeostasis in many animals, yet their influence on reproduction and neoblast proliferation has only been shown in triclads. This study demonstrates that the early‐branching catenulid Stenostomum virginianum contains photoreceptive refractile bodies, synthesizes endogenous melatonin, and that exogenous ...
Daniel L. Stanton, Ian D. Deas, J. Kennon Smith, Samuel B. Robinson, Adam M. Reitzel, Julian P. S. Smith III   +5 more
wiley   +1 more source