Results 21 to 30 of about 1,281,546 (311)

A Hermaphrodite Sea-Urchin [PDF]

Nature, 1932
COMPARATIVELY few cases of hermaphroditism have been recorded among echinoids. Gadd1 has described a specimen of Strongylocentrotus drbachiensis with four segments of the gonad female and one segment male. Gray2 has described a specimen of S. lividus with three segments female and two mixed female and male.
Hilary B. Moore
openalex   +2 more sources

Comparative morpho‐physiological aspects and transcriptomics of the gonads from wild caught and enhanced green sea urchin (Strongylocentrotus droebachiensis)

Aquaculture, Fish and Fisheries, 2022
There is a growing interest in sea urchin roe enhancement around the world, but relatively little is known about the physical differences between enhanced and wild sea urchin roe and the causes of any differences.
I. Mathisen Sætra, E. Burgerhout, H. Johnsen, P. James   +3 more
doaj   +1 more source

Alterations in sea urchin (Mesocentrotus nudus) microbiota and their potential contributions to host according to barren severity

npj Biofilms and Microbiomes, 2023
Sea urchins are biotic factors driving the decline of kelp forests in marine ecosystems. However, few studies have analyzed the microbiota of surviving sea urchins in barren regions with scarce diet resources.
Joon-Young Park, Jae-Won Jo, Yu-Jeong An, Jin-Jae Lee, Bong-Soo Kim   +4 more
doaj   +1 more source

Contamination of sea urchin Mesocentrotus nudus by radiocesium released during the Fukushima Daiichi Nuclear Power Plant accident.

PLoS ONE, 2022
Countless marine organisms were polluted with radioactive materials that were dispersed when the Fukushima Daiichi Nuclear Power Plant (FDNPP) was damaged in 2011 by the Great East Japan Earthquake.
Mst Nazira Akhter Rithu, Akira Matsumoto, Naoto Hirakawa, Yukari Ito, Hisayuki Arakawa   +4 more
doaj   +2 more sources

Distinct realized physiologies in green sea urchin (Strongylocentrotus droebachiensis) populations from barren and kelp habitats

FACETS, 2022
Overgrazing of habitat-forming kelps by sea urchins is reshaping reef seascapes in many temperate regions. Loss of kelp, in particular as a food source, may alter individual consumer physiology, which in turn may impair their ability to respond to ...
Jasmin M. Schuster, A. Kurt Gamperl, Patrick Gagnon, Amanda E. Bates   +3 more
doaj   +1 more source

Characteristic of Microplastic on Coral Reef Sediment and Sea Urchin (Diadema sp.) in Tidung Island, Jakarta Bay, Indonesia

Ilmu Kelautan, 2023
Microplastics are recognized as common contaminants of coral ecosystem in Tidung Island, affecting both sediment and sea urchins residing in this environment. Therefore, this study aimed to determine the characteristics of microplastics found in sediment,
Sulistiowati Sulistiowati, Neviaty Putri Zamani, Dietriech Geofrfey Bengen, Cheng Ling Lim, Muhammad Reza Cordova   +4 more
doaj   +1 more source

Sea urchin utilisation in Eastern Indonesia

Ilmu 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, Rohani Ambo-Rappe, Sharifuddin Bin Andy Omar, Budimawan Pagalay, Muhammad Iqram, Willem Renema, Abigail Mary Moore   +6 more
doaj   +1 more source

On a viviparous Sea-Urchin [PDF]

Annals and Magazine of Natural History
n ...
E. Grube
openalex   +4 more sources

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

Ciencias 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]

PLoS 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, Lars Brunner, Elizabeth J Cook, Maeve S Kelly, Ben Wilson   +4 more
doaj   +1 more source