Results 41 to 50 of about 1,420,649 (295)

Variation in purple sea urchin (Strongylocentrotus purpuratus) morphological traits in relation to resource availability [PDF]

open access: yesPeerJ, 2021
Flexible resource investment is a risk sensitive reproductive strategy where individuals trade resources spent on reproduction for basic metabolic maintenance and survival.
Joshua G. Smith, Sabrina C. Garcia
doaj   +2 more sources

Inside or Outside the Pits : Variable Mobility in Conspecific Sea Urchin, Anthocidaris crassispina (A. Agassiz) [PDF]

open access: yes, 1994
The sea urchin Anthocidaris crassispina (A. Agassiz) lives either in small pits or outside the pits on rock surfaces. Difference in movement between individuals living inside and outside the pits was investigated. Sea urchins living inside the pits never
Yamamoto, Tomoko, Yusa, Yoichi
core   +1 more source

Expression Regulation Mechanisms of Sea Urchin (Strongylocentrotus intermedius) Under the High Temperature: New Evidence for the miRNA-mRNA Interaction Involvement

open access: yesFrontiers in Genetics, 2022
In the context of global warming and continuous high temperatures in the northern part of China during summer, the mortality rate of our main breeding species, Strongylocentrotus intermedius, reached 80% in 2020.
Lingshu Han   +14 more
doaj   +1 more source

Turning waste into gold: Sustainable feed made of discards from the food industries promotes gonad development and colouration in the commercial sea urchin Paracentrotus lividus (Lamarck, 1816)

open access: yesAquaculture Reports, 2021
Development of sustainable aquaculture practices is a suitable solution to reduce the pressure on overexploited stocks of the Mediterranean sea urchin, Paracentrotus lividus, and to respond to the increasing market demand. To move forward the Blue Growth
Laura Ciriminna   +5 more
doaj   +1 more source

The behavior of sympatric sea urchin species across an ecosystem state gradient [PDF]

open access: yesPeerJ, 2023
Background In temperate macroalgal forests, sea urchins are considered as a keystone species due to their grazing ability. Given their potential to shape benthic communities, we monitored the habitat use by three sympatric sea urchin species and compared
Dominic Franco C. Belleza   +5 more
doaj   +2 more sources

Sea Urchin Recruitment: Effect of Substrate Selection on Juvenile Distribution [PDF]

open access: yes, 1980
Intertidal field observations have shown that juvenile purple sea urchins Strongylocentwtus purpuratus are found in higher densities near adults . The same is true for subtidal populations of juvenile red sea urchins 5. franciscanus.
Cameron, R. A., Schroeter, S. C.
core   +1 more source

Species and Abundance of Sea Urchins (Diadematidae) on Different Environmental Pressure Conditions

open access: yesJournal of Tropical Life Science, 2017
Genetic diversity of sea urchin are very high; there are no two organisms of the same species that are exactly alike. Dense aggregation of sea urchin is responsible for the destruction of marine algae communities on coral reef ecosystem.
Pratama Diffi Samuel   +2 more
doaj   +1 more source

Accumulation of Microplastics in the Digestive Tract and Gonads and its Effects on Gonad Quality of Sea Urchins Tripneustes gratilla

open access: yesBiotropika: Journal of Tropical Biology, 2023
Marine plastic debris will move with the flow of water and float and then be fragmented into smaller particles, namely microplastics, sink, and settle on the substrate. Sea urchins, as deposit feeders, can potentially ingest microplastic particles, which
Vanela Chatrin Lekatompessy   +2 more
doaj   +1 more source

Sequencing and analysis of the gastrula transcriptome of the brittle star Ophiocoma wendtii [PDF]

open access: yes, 2012
Background The gastrula stage represents the point in development at which the three primary germ layers diverge. At this point the gene regulatory networks that specify the germ layers are established and the genes that define the differentiated states ...
Garey, James R.   +4 more
core   +2 more sources

Gastrulation in the sea urchin

open access: yes, 2020
Gastrulation is arguably the most important evolutionary innovation in the animal kingdom. This process provides the basic embryonic architecture, an inner layer separated from an outer layer, from which all animal forms arise. An extraordinarily simple and elegant process of gastrulation is observed in the sea urchin embryo. The cells participating in
McClay, David R.   +4 more
openaire   +4 more sources

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