Results 141 to 150 of about 1,447,789 (299)

Competitive titration in living sea urchin embryos of regulatory factors required for expression of the CyIIIa actin gene [PDF]

, 1990
Previous studies have located some twenty distinct sites within the 2.3 kb 5' regulatory domain of the sea urchin CyIIIa cytoskeletal actin gene, where there occur in vitro high-specificity interactions with nuclear DNA-binding proteins of the embryo ...
Anderson, Roger, Britten, Roy J., Davidson, Eric H., Franks, Roberta R., Hough-Evans, Barbara R., Moore, James G.   +5 more
core  

Evaluating and Advancing the Use of Shore‐Based Observers for Scientific Sampling and Catch Verification in High‐Volume Fisheries

Fisheries Management and Ecology, Volume 33, Issue 3, Page 612-629, June 2026.
ABSTRACT Shore‐based observers are increasingly being used in place of at‐sea observers to monitor and sample commercial fisheries catch. However, few evaluations assess whether these programs meet their stated goals or how to optimize them, and industry data are rarely tested for accuracy despite serving as the foundation for catch accounting. Using a
Christian Gredzens, Andy Kingham, Jason E. Jannot   +2 more
wiley   +1 more source

The oral-aboral axis of a sea urchin embryo is specified by first cleavage [PDF]

, 1989
Several lines of evidence suggest that the oral-aboral axis in Strongylocentrotus purpuratus embryos is specified at or before the 8-cell stage. Were the oral-aboral axis specified independently of the first cleavage plane, then a random association of ...
Britten, Roy J., Cameron, R. Andrew, Davidson, Eric H., Fraser, Scott E.   +3 more
core  

Into the Wild: Farm‐Derived Energy and Nutrients Enter Marine Food Webs With Carrying Capacity Implications for Aquaculture Management

Reviews in Aquaculture, Volume 18, Issue 3, June 2026.
ABSTRACT Marine aquaculture is expanding globally, yet its interactions with surrounding ecosystems remain complex and insufficiently understood. This study reviews the fluxes of energy and nutrients from three major aquaculture systems: finfish cages, suspended bivalves, and seaweed farms and considers their implications for ecosystem functioning and ...
Myriam D. Callier, Ramon Filgueira, Carrie J. Byron, Daniele Brigolin, Dror L. Angel, Sophie J. I. Koch, Bobbi Hudson, Frank Kane, Heather Moore, Antonio Agüera, Lotta C. Kluger, Christopher W. McKindsey   +11 more
wiley   +1 more source

Localized Activation of Bending in Proximal, Medial and Distal Regions of Sea-Urchin Sperm Flagella [PDF]

, 1973
Spermatozoa from the sea urchin, Colobocentrotus atratus, were partially demembranated by extraction with solutions containing Triton X-100 at a concentration which was insufficient to solubilize the membranes completely.
Brokaw, C. J., Gibbons, I. R.
core  

Prenucleation Species Dictate Foreign Ion Incorporation in the Biomineral Precursor Amorphous Calcium Carbonate

Advanced Functional Materials, Volume 36, Issue 36, 4 May 2026.
ACC forms via aggregating prenucleation clusters that gatekeep its chemical composition. Ion identity steers the path: Ba and Sr substitute Ca in clusters, thereby inhibiting nucleation, with a dose‐dependent switch of Sr to induction. Mg partitions into Mg‐rich and Mg‐poor clusters; the latter form ACC, expelling Mg.
Qianyu Zhao, Patrick Duchstein, Benedikt Demmert, Thi Q. Nhi Dao, Krishnaveni Anjala, Evelyn Gruber, Franziska Gröhn, Dirk Zahn, Dorrit E. Jacob, Stephan E. Wolf   +9 more
wiley   +1 more source

Re-examination of the Effects of Food Abundance on Jaw Plasticity in Purple Sea Urchins [PDF]

, 2019
Morphological plasticity is a critical mechanism that animals use to cope with variations in resource availability. During periods of food scarcity, sea urchins demonstrate an increase in jaw length relative to test diameter.
deVries, Maya S, Taylor, Jennifer R. A., Webb, Summer   +2 more
core   +1 more source

Mesopelagic Fish as a Promising New Source of Omega‐3 Fatty Acids in Comparison With Australian Commercial Seafood

Journal of the American Oil Chemists' Society, Volume 103, Issue 5, Page 489-494, May 2026.
ABSTRACT Global dietary guidelines consistently recommend regular seafood consumption to support adequate omega‐3 long‐chain (≥ C20) polyunsaturated fatty acid (n‐3 LC‐PUFA) intake. Most international health authorities advise two servings of seafood per week, including at least one serve of oily fish, to achieve approximately 500 mg/day of combined ...
Bowen Zhang, Patti Virtue, Peter D. Nichols, Kim Jye Lee Chang   +3 more
wiley   +1 more source

Multiple Longitudinal Tracts in the Cephalopod Arm Sensorimotor System

Journal of Comparative Neurology, Volume 534, Issue 5, May 2026.
Octopuses have a rich behavioral repertoire, coordinating complex movements along the length of an arm. The neural circuits controlling these behaviors are poorly understood. We employ tract‐tracing to investigate longitudinal tracts in the octopus arm.
Cassady S. Olson, Clifton W. Ragsdale
wiley   +1 more source

Testing sea urchin and green sea turtle consumption of the allelopathic macroalga Galaxaura divaricata

Ecology and Evolution
Galaxaura divaricata is a partially calcified macroalga that hampers coral recruitment, growth, and recovery via the excretion of allelopathic secondary metabolites. Herbivorous fishes are not major consumers of Galaxaura spp.
Carolin Nieder, Siobhan Jean Heatwole, Chen‐Pan Liao, Chen‐Lu Lee, Chaolun Allen Chen, Shao‐Lun Liu   +5 more
doaj   +1 more source