Results 31 to 40 of about 1,405,896 (309)

Urchin Searchin’: Red urchins and drift kelp found at 284 m in the mesophotic zone

open access: yesCiencias Marinas, 2020
Red sea urchins (Mesocentrotus franciscanus) are kelp-associated ecosystem engineers found in rocky habitats throughout the North Pacific from Baja California, Mexico, to Japan.
Alexander T Lowe, Aaron WE Galloway
doaj   +1 more source

Echinoderms display morphological and behavioural phenotypic plasticity in response to their trophic environment. [PDF]

open access: yesPLoS ONE, 2012
The trophic interactions of sea urchins are known to be the agents of phase shifts in benthic marine habitats such as tropical and temperate reefs. In temperate reefs, the grazing activity of sea urchins has been responsible for the destruction of kelp ...
Adam D Hughes   +4 more
doaj   +1 more source

Digestive Enzyme Activities and Gut Emptying Are Correlated with the Reciprocal Regulation of TRPA1 Ion Channel and Serotonin in the Gut of the Sea Urchin Strongylocentrotus intermedius

open access: yesBiology, 2022
The energetic link in the benthic community is based on physiological characteristics of the low food absorption efficiency of sea urchins. Low food absorption efficiency of sea urchins is correlated with the activity of digestive enzymes and the ...
Jingyun Ding   +8 more
doaj   +1 more source

Behavioral plasticity of nocturnal marine organisms under interspecific competitive pressure

open access: yesGlobal Ecology and Conservation, 2023
Pacific abalone (Haliotis discus hannai) are typical nocturnal organisms in the marine benthic ecosystem. However, whether their rhythmic behavior is related to the avoidance of interspecific competition for food resources is unknown.
Qi Luo   +6 more
doaj   +1 more source

Foraging behavior of the sea urchin Mesocentrotus nudus exposed to conspecific alarm cues in various conditions

open access: yesScientific Reports, 2021
Conspecific alarm cues crushed from Mesocentrotus nudus prevent sea urchins from foraging the kelp, but do not repel them far away from the kelp. However, it remains largely unknown of whether this phenomenon was affected by conspecific alarm cues or by ...
Xiaomei Chi   +7 more
doaj   +1 more source

Sea urchin utilisation in Eastern Indonesia

open access: yesIlmu Kelautan, 2023
Sea urchins have long been an important component of gleaning invertebrate fisheries and are valued for their highly nutritious gonads. Sea urchin fisheries are often unreported and unregulated, despite increasing indications of overexploitation. Data on
Hartati Tamti   +6 more
doaj   +1 more source

Eutacticity in Sea Urchin Evolution [PDF]

open access: yesBulletin of Mathematical Biology, 2007
An eutactic star, in a n-dimensional space, is a set of N vectors which can be viewed as the projection of N orthogonal vectors in a N-dimensional space. By adequately associating a star of vectors to a particular sea urchin we propose that a measure of the eutacticity of the star constitutes a measure of the regularity of the sea urchin. Then we study
López-Sauceda, J., Aragón, J. L.
openaire   +3 more sources

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

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

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