Results 71 to 80 of about 56,693 (262)

Post‐LECA Origin and Diversification of an Axonemal Outer Arm Dynein Motor

open access: yesCytoskeleton, EarlyView.
ABSTRACT Dyneins were present in the last eukaryotic common ancestor (LECA) and play key roles in eukaryotic biology. Axonemal dyneins form the inner and outer arms that power ciliary beating, and it has long been recognized that outer arms in some organisms contain two different heavy chain motors, whereas those from other species contain a third unit
Stephen M. King
wiley   +1 more source

Induced spawning in sea urchins [PDF]

open access: yes, 1982
The gonad wall of the sea urchin consists of an outer epithelium, the outer surface of which is bathed in the perivisceral fluid, a middle layer of conspicuous bands of smooth muscles and connective tissue and an inner layer of developing gametes ...
Vivek Raja, P
core  

Phenotypic flexibility and the evolution of organismal design [PDF]

open access: yes, 2003
Evolutionary biologists often use phenotypic differences between species and between individuals to gain an understanding of organismal design. The focus of much recent attention has been on developmental plasticity – the environmentally induced ...
Drent, Jan,, Piersma, Theunis,
core   +3 more sources

Possible role of microtubules in vesicular transport of matrix protein during sea urchin larval biomineralization

open access: yesDevelopmental Dynamics, EarlyView.
Abstract Background Biomineralization is a vital biological process through which organisms produce mineralized structures such as shells, skeletons, and teeth. Microtubules are essential for biomineralization in various eukaryotic species; however, their specific roles in this process remain unclear.
Areen Qassem   +2 more
wiley   +1 more source

Revision of new species of Eocene sea urchins from Istria, described in the 19th and 20th centuries

open access: yesGeologija, 2008
In paper are presented drawings and pictures of sea urchins from original works of authors who determined and documented new species from Istria.
Vasja Mikuž
doaj  

Spatial and seasonal variation of the gonad index of Diadema antillarum (Echinodermata:Echinoidea) in the Canary Islands

open access: yesScientia Marina, 2006
Diadema antillarum Philippi occurs in high density populations in the Canary Islands, creating extensive barren areas. During one year we determined seasonal changes in the algal abundance and population densities, test diameter, gut contents ...
José Carlos Hernández   +6 more
doaj   +1 more source

Sea cucumber and sea urchin resources [PDF]

open access: yes, 1983
The Andaman and Nicobar Islands offer one of the most suitable habitats for sea cucumbers and sea urchins due to the presence of sheltered bays and lagoons.
James, D B
core  

Environmental and local habitat variables as predictors of trophic interactions in subtidal rocky reefs along the SE Pacific coast

open access: yesEcography, EarlyView.
Temperature generally drives latitudinal patterns in the strength of trophic interactions, including consumption rates. However, local community and other environmental conditions might also affect consumption, disrupting latitudinal gradients, which results in complex large‐scale patterns.
Catalina A. Musrri   +6 more
wiley   +1 more source

St. Kitts and Nevis: Coral Reef Report Card 2016 [PDF]

open access: yes, 2016
The Eastern Caribbean Seascape is an arc of islands linked through diverse coral reef ecosystems, oceanic currents, migratory pathways and a rich cultural heritage. The Eastern Caribbean Coral Reef Report Cards are a series of individual reports for the6

core  

Ecological Complexity of Coral Recruitment Processes: Effects of Invertebrate Herbivores on Coral Recruitment and Growth Depends Upon Substratum Properties and Coral Species [PDF]

open access: yes, 2013
Sarah W. Davies, Mikhail V. Matz, Integrative Biology Section, The University of Texas at Austin, Austin, Texas, United States of AmericaSarah W. Davies, Peter D.
Davies, Sarah W.   +2 more
core   +1 more source

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