Results 31 to 40 of about 56,693 (262)

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

The Addition of Ulva Reticulata as a Stimulant Into Artificial Feed on the Gonad Condition of the Collector Sea Urchin (Tripneustes Gratilla Linnaeus 1758) [PDF]

open access: yes, 2014
Dried Ulva reticulata has been proven as a feeding stimulant for the collector sea urchins (Tripneustes gratilla). The purposes of this study were to determine the optimal dose of dried U.
Purbiantoro, W. (Wahyu)   +2 more
core   +3 more sources

Evolutionary plasticity of developmental gene regulatory network architecture [PDF]

open access: yes, 2007
Sea stars and sea urchins evolved from a last common ancestor that lived at the end of the Cambrian, approximately half a billion years ago. In a previous comparative study of the gene regulatory networks (GRNs) that embody the genomic program for ...
Britten   +25 more
core   +4 more sources

Sea Urchin (Echinoidea) Distribution and Abundance in the Intertidal Zone of Bengkayang Regency

open access: yesBiosaintifika: Journal of Biology & Biology Education, 2018
Sea urchins is the member of Echinoidea. This species can be found in tropical marine water to the poles. The study aimed to know the types, the abundance and spread of sea urchins in Bengkayang Regency. The research, used the transect method.
Andi Ristanto   +2 more
doaj   +1 more source

How to generate pentagonal symmetry using Turing systems [PDF]

open access: yes, 2002
We explore numerically the formation of Turing patterns in a confined circular domain with small aspect ratio. Our results show that stable fivefold patterns are formed over a well defined range of disk sizes, offering a possible mechanism for inducing ...
Aragón, J. L.   +4 more
core   +2 more sources

Comparative Raman spectroscopy study of the coelomic fluid of grazing sea urchins and their native seawater: prospect for a potential indicator of environmental aggression [PDF]

open access: yesAerul şi Apa: Componente ale Mediului, 2018
Sea urchins have limited ability to move, and they use the watervascular circulation system to pump surrounding sea water in order to set body parts in motion.
F. NEKVAPIL   +2 more
doaj   +1 more source

Detrital kelp subsidy supports high reproductive condition of deep-living sea urchins in a sedimentary basin

open access: yesAquatic Biology, 2014
Highly productive kelp beds off Nova Scotia, Canada export detrital material to adjacent sedimentary habitats in deeper waters. We evaluated the importance of this subsidy to sea urchins Strongylocentrotus droebachiensis in less productive habitats ...
K Filbee-Dexter, RE Scheibling
doaj   +1 more source

Effects of eliminating interactions in multi-layer culture on survival, food utilization and growth of small sea urchins Strongylocentrotus intermedius at high temperatures

open access: yesScientific Reports, 2021
Poor growth and disease transmission of small sea urchins Strongylocentrotus intermedius in summer greatly hamper the production efficiency of the longline culture.
Fangyuan Hu   +9 more
doaj   +1 more source

Keeping a lid on nodal : transcriptional and translational repression of nodal signalling [PDF]

open access: yes, 2016
Nodal is an evolutionarily conserved member of the transforming growth factor-β (TGF-β) superfamily of secreted signalling factors. Nodal factors are known to play key roles in embryonic development and asymmetry in a variety of organisms ranging from ...
Robertson, Elizabeth J., Sampath, Karuna
core   +1 more source

The challenge of managing the commercial harvesting of the sea urchin Paracentrotus lividus: advanced approaches are required [PDF]

open access: yesPeerJ, 2020
Sea urchins act as a keystone herbivore in marine coastal ecosystems, regulating macrophyte density, which offers refuge for multiple species. In the Mediterranean Sea, both the sea urchin Paracentrotus lividus and fish preying on it are highly valuable ...
Simone Farina   +11 more
doaj   +2 more sources

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