Results 51 to 60 of about 13,553 (230)

Microtubule sliding in swimming sperm flagella: direct and indirect measurements on sea urchin and tunicate spermatozoa [PDF]

open access: yes, 1991
Direct measurements of microtubule sliding in the flagella of actively swimming, demembranated, spermatozoa have been made using submicron diameter gold beads as markers on the exposed outer doublet microtubules.
Brokaw, Charles J.
core  

Benthic megafauna and the functioning of macroalgal forests and urchin barrens

open access: yesOikos, EarlyView.
Two temperate rocky reef food‐web models, representing the trophic diversity of the Mediterranean rocky reef communities, were built for the two stable states: macroalgal forests and barren grounds, which are characterized by opposite amounts of erect macroalgal biomass.
Chiara Bonaviri   +18 more
wiley   +1 more source

The complete mitogenome of an unidentified Oikopleura species [version 3; peer review: 2 approved, 2 approved with reservations]

open access: yesF1000Research
Appendicularians are planktonic tunicates abundant all over the world. Currently, only two complete annotated mitochondrial genome assemblies are available for appendicularians, both for cryptic species of Oikopleura dioica.
Nicholas M. Luscombe   +5 more
doaj   +1 more source

From Development To Evolution: The Re-Establishment Of The Alexander Kowalevsky Medal [PDF]

open access: yes, 2002
The Saint Petersburg Society of Naturalists has reinstated the Alexander O. Kowalevsky Medal. This article announces the winners of the first medals and briefly reviews the achievements of A.O.
Gilbert, Scott F., Mikhailov, A. T.
core   +1 more source

Cu,Zn superoxide dismutase genes in Tribolium castaneum: evolution, molecular characterisation and gene expression during immune priming. [PDF]

open access: yes, 2017
The production of reactive oxygen species (ROS) is a normal consequence of the aerobic cell metabolism. Despite their high and potentially detrimental reactivity with various biomolecules, the endogenous production of ROS is a vital part of physiological,
Bakiu, Rigers   +5 more
core   +2 more sources

The effects of single versus successive warm summers on an intertidal community

open access: yesOikos, EarlyView.
To accurately predict how organisms and ecological communities will respond to future conditions caused by climate change, we must consider the temporal dynamics of environmental stressors, including the effects of repeated exposures to stress. We performed a two‐year passive thermal manipulation in coastal British Columbia, Canada to determine how ...
Amelia V. Hesketh   +3 more
wiley   +1 more source

Chimerism a natural ability to tolerate kin, evolutionary traits connecting mammalian and protochordates [PDF]

open access: yesInvertebrate Survival Journal, 2009
In the middle of the 20th century, Owen (1945, 1954) and Billingham et al. (1953) immunological studies suggested that fetal exposure to foreign antigens during pregnancy induce immunologic tolerance in the fetus. Recently, Mold et al.
A Voskoboynik
doaj   +1 more source

The complete mitogenome of an unidentified Oikopleura species [version 2; peer review: 2 approved, 2 approved with reservations]

open access: yesF1000Research
Appendicularians are planktonic tunicates abundant all over the world. Currently, only two complete annotated mitochondrial genome assemblies are available for appendicularians, both for cryptic species of Oikopleura dioica.
Nicholas M. Luscombe   +5 more
doaj   +1 more source

A review of the life history, invasion process, and potential management of Clavelina lepadiformis Müller, 1776: a recent invasion of the northwest Atlantic [PDF]

open access: yesManagement of Biological Invasions, 2012
The colonial tunicate Clavelina lepadiformis is a recent invader to the northwest Atlantic and has the potential to cause ecological andeconomic harm. This paper provides a review of the biological and ecological characteristics of C.
James F. Reinhardt, David M. Hudson
doaj  

Pax3/7 regulates neural tube closure and patterning in a non-vertebrate chordate

open access: yesFrontiers in Cell and Developmental Biology, 2022
Pax3/7 factors play numerous roles in the development of the dorsal nervous system of vertebrates. From specifying neural crest at the neural plate borders, to regulating neural tube closure and patterning of the resulting neural tube.
Kwantae Kim   +2 more
doaj   +1 more source

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