Results 81 to 90 of about 20,652 (215)
Sperm Head–Tail Coupling Apparatus Diversity and Common Themes Among Species
Andrology, EarlyView.ABSTRACT Background A stable connection between the sperm head (containing the nucleus and acrosome) and tail (containing the axoneme, mitochondrial sheath, and periaxonemal structures) is critical for fertility. This connection is mediated by a series of nuclear, cytoplasmic, and centriole components that make up the head–tail coupling apparatus (HTCA)
Danielle B. Buglak +2 more
wiley +1 more source
Biotropia: The Southeast Asian Journal of Tropical BiologyArticle Highlights - The highest absolute abundance of sea urchin Tripneustes gratilla was observed in August 2023 - In 2024, the low absolute abundance of Tripneustes gratilla and the decline of sea urchin species diversity in North Lombok ...
Victor David Nico Gultom
doaj +1 more source
Andrology, EarlyView.ABSTRACT Background Mammalian sperm need to undergo hyperactivation, capacitation, and acrosome reaction to achieve fertilization competence. However, the female reproductive tract presents contrasting metabolic environments. The uterus is glucose‐rich, and the oviduct is lactate‐rich and glucose‐limited.
Md Faizul Hossain Miraz +5 more
wiley +1 more source
PLoS ONE, 2015 In eastern Canada, the destruction of kelp beds by dense aggregations (fronts) of the omnivorous green sea urchin, Strongylocentrotus droebachiensis, is a key determinant of the structure and dynamics of shallow reef communities.
Desta L Frey, Patrick Gagnon
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Archaeometry, EarlyView.ABSTRACT Pinctada margaritifera (black‐lipped pearl oyster) artefacts are ubiquitous in the archaeological record throughout the Pacific and particularly in Polynesia. Despite efforts towards the development of typologies, the lack of microwear and use‐wear studies has prevented the development of technological approaches. We used 20 pearl shell valves
Jemma McGloin +2 more
wiley +1 more source
The Transcriptome of the Sea Urchin Embryo
Science, 2006 The sea urchin Strongylocentrotus purpuratus is a model organism for study of the genomic control circuitry underlying embryonic development. We examined the complete repertoire of genes expressed in the S.
Samanta, Manoj P. +6 more
openaire +3 more sources
Acta Zoologica, EarlyView.ABSTRACT Pedicellariae are small appendages on the surface of the echinoid test, involved in defence, cleaning, and locomotion. Pedicellariae in three species of camarodont sea urchins common in UK waters (Paracentrotus lividus [Lamarck, 1816], Psammechinus miliaris [P.L.S Müller, 1771] and Echinus esculentus [Linnaeus, 1758]) are the focus of this ...
H. C. Reinardy +6 more
wiley +1 more source
Holocene shoreline displacement and the impact of the Storegga tsunami on Hinnøya, northern Norway
Boreas, EarlyView.The Holocene relative sea‐level (RSL) history of Norway's largest island, Hinnøya, has been investigated in detail, using sediment records from 25 isolation basins. The sediments were analysed for macrofossil and phytoplankton content, which served as the basis for identifying marine–lacustrine transitions, that is isolation contacts. Terrestrial plant
Anders Romundset +5 more
wiley +1 more source
Advancing conservation breeding programs for marine invertebrates
Conservation Biology, EarlyView.Abstract In the face of ecosystem change and biodiversity loss caused by climate change and other stressors, conservation breeding, or captive breeding, with the aim of reintroduction for wild population recovery, is an emerging tool for preventing species’ extinction and rehabilitating ecosystems.
Elora H. López‐Nandam +3 more
wiley +1 more source