..., but its native substrates are not known. Here, we used larvae of the sea urchin Strongylocentrotus purpuratus to characterize the early life expression and role of Sp-ABCB1a , a homolog of ABCB1. The results indicate that while Sp - ABCB1a is initially expressed ubiquitously, it becomes enriched...

...John D. Kirwan; Michael J. Bok; Jochen Smolka; James J. Foster; José Carlos Hernández; Dan-Eric Nilsson ABSTRACT Many sea urchins can detect light on their body surface and some species are reported to possess image-resolving vision. Here, we measure the spatial resolution of vision in the long...

...Tatsuo Motokawa; Yoshiro Fuchigami ABSTRACT Echinoderms have catch connective tissues that change their stiffness as a result of nervous control. The coordination between catch connective tissue and muscles was studied in the spine joint of the sea urchin Diadema setosum . Spine joints are equipped...

...Shigeru Kawamata SUMMARY Algal mats can hinder the adhesion of the tube feet of sea urchins. This leads to the hypothesis that the restriction of sea urchin feeding activity by wave action can potentially be enhanced by the presence of algal mats, which will facilitate the survival of kelp recruits...

..., high-current areas. † Author for correspondence ( Hannah.Stewart@dfo-mpo.gc.ca ) * Present address: West Vancouver Laboratory, Fisheries and Oceans Canada, 4160 Marine Drive, West Vancouver, BC V7V 1N6, Canada 9 5 2011 © 2011. 2011 sea urchin streamlining behaviour...

... invertebrates, in particular on their early developmental stages. Echinoderm larvae could be particularly vulnerable to decreased pH, with major consequences for adult populations. The objective of this study was to understand how ocean acidification would affect the initial life stages of the sea urchin...

... the biological effects of UV-B, in situ experiments were conducted at Cape Armitage in McMurdo Sound, Antarctica (77.06°S, 164.42°E) on the common Antarctic sea urchin Sterechinus neumayeri Meissner (Echinoidea) over two consecutive 4-day periods in the spring of 2008 (26–30 October and 1–5 November...

... species possess the physiological capacity to compensate for the potentially adverse effects of ocean acidification. We carried out a microarray-based transcriptomic analysis of the physiological response of larvae of a calcifying marine invertebrate, the purple sea urchin, Strongylocentrotus purpuratus...

... but are not necessarily representative of the in vivo situation. We therefore investigated the effect of a variety of cell-permeable chemicals, mostly kinase inhibitors,on the motility initiation and maintenance of intact sea urchin spermatozoa. Among the 20 substances tested, the protein kinase C (PKC) inhibitor...

... from the extracellular space remains unclear. Using two well-characterized cell types from the sea urchin,we show that extracellular mixtures of the constitutive and inducible forms of the 70 kDa heat shock proteins (Hsc70 and Hsp70, respectively) have dramatic effects on initiation of cell division...

...Hideki Katow; Shunsuke Yaguchi; Keiichiro Kyozuka SUMMARY A full-length serotonin receptor mRNA from the 5Hthpr gene was sequenced from larvae of the sea urchin, Hemicentrotus pulcherrimus. The DNA sequence was most similar to 5HT-1A of the sea urchin Strongylocentrotus purpuratus found by The Sea...

... flagellar movement local inhibition PRODAN sea urchin The flagellum is a micro-machine that produces spontaneous beating. The bending wave is the product of active sliding among the outer doublet microtubules, generated by dynein ATPase. In metazoa, dynein is composed of two heavy chains, three...

...Douglas A. Pace; Donal T. Manahan SUMMARY Defining the physiological mechanisms that set metabolic rates and the`cost of living' is important for understanding the energy costs of development. Embryos and larvae of the sea urchin Lytechinus pictus (Verrill) were used to test hypotheses regarding...

.... Natl. Acad. Sci. USA 95 , 11152 -11157. Chino, Y., Saito, M., Yamasu, K., Suyemitsu, T. and Ishihara,K. ( 1994 ). formation of the adult rudiment of sea-urchins is influenced by thyroid-hormones. Dev. Biol. 161 , 1 -11. Christ, M., Haseroth, K., Falkenstein, E. and Wehling, M. ( 1999...

... -modulus of 6.0 and 8.1 kPa for sea stars and sea urchins, respectively), have viscoelastic properties and adapt their surface to the substratum profile. They also show increased adhesion on a rough substratum in comparison to its smooth counterpart, which is due mostly to an increase in the geometrical...

...Lori A. Clow; David A. Raftos; Paul S. Gross; L. Courtney Smith SUMMARY The purple sea urchin Strongylocentrotus purpuratus expresses a homologue of complement component C3 (SpC3), which acts as a humoral opsonin. Significantly increased phagocytic activity was evident when yeast target cells were...

...Michael P. Lesser; Valerie A. Kruse; Thomas M. Barry SUMMARY Laboratory exposures of embryos from the sea urchin Strongylocentrotus droebachiensis to ultraviolet B radiation (UV-B, 290-320 nm), equivalent to a depth of 1-3 m in the Gulf of Maine, resulted in significant damage to DNA measured...

...Giovanna Romano; Gian Luigi Russo; Isabella Buttino; Adrianna Ianora; Antonio Miralto SUMMARY The diatom-derived aldehyde 2- trans -4- trans -decadienal(DD) was tested as an apoptogenic inducer in both copepod and sea urchin embryos, using terminal-deoxynucleotidyl-transferase-mediated dUTP nick...

...T. Unuma; T. Yamamoto; T. Akiyama; M. Shiraishi; H. Ohta SUMMARY Both male and female sea urchins accumulate the major yolk protein (MYP;the most abundant yolk granule protein in sea urchin eggs) in the nutritive phagocytes of immature gonads before gametogenesis. In this study,quantitative changes...

...Adam G. Marsh; Patrick K. K. Leong; Donal T. Manahan ABSTRACT Developmental energetics of an Antarctic sea urchin, Sterechinus neumayeri , were quantified to describe the physiological bases underlying ontogenetic changes in metabolic rate at extreme cold temperatures (−1.5 °C). Rates...