Results 41 to 50 of about 361 (104)

Apendicularias (Urochordata) y quetognatos (Chaetognatha) del Parque Nacional Isla del Coco, Costa Rica Appendicularians (Urochordata) and chaetognaths (Chaetognatha) of Isla del Coco National Park, Costa Rica

open access: yesRevista de Biología Tropical, 2012
Las apendicularias y quetognatos son miembros importantes del zooplancton pero poco estudiados en Costa Rica y no del todo en el Parque Nacional Isla del Coco, Pacífico tropical este.
Iván Castellanos-Osorio   +3 more
doaj  

Nuevos registros de Appendicularia (Urochordata) y otras especies de zooplancton en el Pacífico tropical mexicano

open access: yesActa Zoológica Lilloana
Se reportan nuevos registros de zooplancton en el Pacífico tropical mexicano, con un énfasis particular en apendicularias. Las muestras se recolectaron entre enero de 2023 y junio de 2024 en diversas localidades utilizando redes de plancton, así como ...
Carlos Alberto Sandoval-Navarrete   +5 more
doaj   +1 more source

Variación fenotípica y genética en el tunicado Pyura praeputialis (Heller, 1878) en el área norte de la Bahía de Antofagasta, Chile Phenotypic and genetic variation in tunicate Pyura praeputialis (Heller, 1878) in the northern sac of the Antofagasta Bay

open access: yesRevista Chilena de Historia Natural, 2002
La morfología de los "piures" (Urochordata: Tunicata) es altamente variable, mostrando diferencias hábitat-específicas con una base intra- o interespecífica, lo cual dificulta la comprensión de sus significados taxonómicos, ecológicos y evolutivos. En el
MARCELA ASTORGA   +3 more
doaj  

Evolution and origin of merlin, the product of the Neurofibromatosis type 2 (NF2) tumor-suppressor gene

open access: yesBMC Evolutionary Biology, 2005
Background Merlin, the product of the Neurofibromatosis type 2 (NF2) tumor suppressor gene, belongs to the ezrin-radixin-moesin (ERM) subgroup of the protein 4.1 superfamily, which links cell surface glycoproteins to the actin cytoskeleton.
Omelyanchuk Leonid V   +4 more
doaj   +1 more source

Tunic Morphology and Cellulosic Components of Pyrosomas, Doliolids, and Salps (Thaliacea, Urochordata)

open access: yesThe Biological Bulletin, 1999
The morphology and cellulosic composition of the tunic was studied in pelagic tunicates (3 pyrosomas, 2 doliolids, and 13 salps). The tunic is transparent and gelatinous, consisting of an electron-dense cuticular layer with a fibrous tunic matrix. The thickness and density of the cuticular layer and of the tunic matrix differ from species to species ...
Hirose, E   +3 more
openaire   +4 more sources

Complete DNA Sequence of the Mitochondrial Genome of the Ascidian Halocynthia roretzi (Chordata, Urochordata) [PDF]

open access: yesGenetics, 1999
AbstractThe complete nucleotide sequence of the 14,771-bp-long mitochondrial (mt) DNA of a urochordate (Chordata)—the ascidian Halocynthia roretzi—was determined. All the Halocynthia mt-genes were found to be located on a single strand, which is rich in T and G rather than in A and C. Like nematode and Mytilus edulis mtDNAs, that of Halocynthia encodes
S i, Yokobori   +7 more
openaire   +2 more sources

Brachyury (T) Expression in Embryos of a Larvacean Urochordate, Oikopleura dioica, and the Ancestral Role of T [PDF]

open access: yes, 2000
The Brachyury, or T, gene is required for notochord development in animals occupying all three chordate subphyla and probably also had this role in the last common ancestor of the chordate lineages.
Bassham, Susan, Postlethwait, John
core   +1 more source

Integrated multi-approaches reveal unique metabolic mechanisms of Vestimentifera to adapt to deep sea

open access: yesMicrobiome
Background Vestimentiferan tubeworms are deep-sea colonizers, in which chemoautotrophic symbiosis was first observed. These animals are gutless and depend on endosymbiotic bacteria for organic compound synthesis and nutrition supply.
Qinglei Sun   +3 more
doaj   +1 more source

Additional file 4: of Tracing the evolution of the heterotrimeric G protein α subunit in Metazoa

open access: yes, 2018
Supplemental file 5. Maximum Likelihood Tree of duplications of exon4 in GNAQ and GNA11 and the homologous sequence of preGNAI, encoded by exon5, duplicated in Urochordata.
H. Hamm (5090867)   +4 more
core   +1 more source

Apendicularias (Urochordata) y quetognatos (Chaetognatha) del Parque Nacional Isla del Coco, Costa Rica

open access: yesRevista de Biología Tropical, 2012
Las apendicularias y quetognatos son miembros importantes del zooplancton pero poco estudiados en Costa Rica y no del todo en el Parque Nacional Isla del Coco, Pacífico tropical este.
Iván Castellanos-Osorio   +3 more
doaj  

Home - About - Disclaimer - Privacy