Results 41 to 50 of about 9,888 (235)

Perspective: Something Old, Something New? Review of Wasting and Other Mortality in Asteroidea (Echinodermata)

Frontiers in Marine Science, 2019
Asteroids (Echinodermata) experience mass mortality events that have the potential to cause dramatic shifts in ecosystem structure. Asteroid wasting describes a suite of body wall abnormalities that can ultimately result in animal mortality.
Ian Hewson, Brooke Sullivan, Elliot W. Jackson, Qiang Xu, Hao Long, Chenggang Lin, Eva Marie Quijano Cardé, Justin Seymour, Nachshon Siboni, Matthew R. L. Jones, Mary A. Sewell   +10 more
doaj   +1 more source

The Evolution and Diversity of SALMFamide Neuropeptides [PDF]

, 2013
The SALMFamides are a family of neuropeptides that act as muscle relaxants in echinoderms. Two types of SALMFamides have been identified: L-type (e.g.
Achhala Sufyan, Martynyuk Natalia, Martynyuk, N, Achhala, S, Maurice R Elphick, Elphick, MR, Natalia Martynyuk, Elphick Maurice R., Sufyan Achhala   +8 more
core   +1 more source

Echinoderm‐Inspired Autonomy for Soft‐Legged Robots

Advanced Robotics Research, EarlyView.
Inspired by echinoderms, a modular soft robot achieves autonomous phototaxis without a central controller or explicit communication. Each limb independently adapts its actuation timing through local sensing and short‐term memory. Coordination emerges purely from physical interactions, demonstrating resilience to changes in morphology, environment, and ...
Harmannus A. H. Schomaker, Jelle de Vries, Johannes T. B. overvelde   +2 more
wiley   +1 more source

Echinoderms provide missing link in the evolution of PrRP/sNPF-type neuropeptide signalling

eLife, 2020
Neuropeptide signalling systems comprising peptide ligands and cognate receptors are evolutionarily ancient regulators of physiology and behaviour.
Luis Alfonso Yañez-Guerra, Xingxing Zhong, Ismail Moghul, Thomas Butts, Cleidiane G Zampronio, Alexandra M Jones, Olivier Mirabeau, Maurice R Elphick   +7 more
doaj   +1 more source

A Pentaradial and Bilateral Combined Photoreception System in the Sea Cucumber is Mediated by a Blue Light‐Sensitive R‐Opsin

Advanced Science, EarlyView.
The sea cucumber Holothuria leucospilota detects blue and adjacent wavelengths of light via an r‐opsin with a maximum absorption at 459 nm. In the oral tentacles, papillae, and tube feet, distinct light‐sensing structures with specialized morphologies are formed, constituting a unique pentaradial and bilateral combined photoreception system.
Jiasheng Huang, Chunhua Ren, Zhou Qin, Yimeng Cui, Bingbing Zhang, Peng Luo, Xuan Wang, Yaoqi Xie, Xin Zhang, Aifen Yan, Yang Zhang, Dingding Fan, Yang Liu, Wenjie Pan, Xiao Jiang, Lihong Yuan, Haipeng Qin, David M. Irwin, Chaoqun Hu, Yang Liu, Ting Chen   +20 more
wiley   +1 more source

Partners or passengers? Revisiting the association between diatoms and aquatic animals

Biological Reviews, EarlyView.
ABSTRACT Numerous studies have revealed the importance of research on the communities capable of colonizing animal surfaces (epibionts) and the animals on which they live (basibionts). Very few studies have considered epizoic diatoms, and there are gaps and biases in our knowledge, including the choice of basibionts, the methods used, and the habitats ...
Gianluca Vacca, Elisa Falasco, Francesca Bona   +2 more
wiley   +1 more source

The evolution and variety of RFamide-type neuropeptides: insights from deuterostomian invertebrates

Frontiers in Endocrinology, 2014
Five families of neuropeptides that have a C-terminal RFamide motif have been identified in vertebrates: 1. gonadotropin-inhibitory hormone (GnIH), 2. neuropeptide FF (NPFF) 3. pyroglutamylated RFamide peptide (QRFP), 4. prolactin-releasing peptide (PrRP)
Maurice Richard Elphick, Olivier eMirabeau   +1 more
doaj   +1 more source

Characterization and phylogenetic analysis of the complete mitochondrial genome of Florometra species (Echinodermata, Crinoidea)

Mitochondrial DNA. Part B. Resources, 2020
The Crinoidea is the ancestor class of echinoderm classes, whereas its evolution history remains the least studied in extant echinoderms. In this study, a complete 15,772 bp genome for the crinoid echinoderm, Florometra species (Echinodermata, Crinoidea)
Sang-Eun Nam, Hyoung Sook Park, Jae-Sung Rhee   +2 more
doaj   +1 more source

Impacts of Climate Change on Densities of the Urchin Centrostephanus rodgersii Vary among Marine Regions in Eastern Australia

Diversity, 2023
The urchin Centrostephanus rodgersii is expanding its range southward in eastern Australia, which has been associated with negative ecological impacts, including shifts from kelp forests to barrens.
Tom R. Davis, Nathan A. Knott, Curtis Champion, Rachel Przeslawski   +3 more
doaj   +1 more source

Evidence for adaptive explanations of semelparity in animals

Biological Reviews, EarlyView.
ABSTRACT Semelparity, the reproductive strategy of reproducing once, is widespread but uncommon in animals. Classes of models to explain the evolution of semelparity are based either on age structure and mortality schedules – demographic models in which high post‐reproductive mortality risk favours high reproductive effort and semelparity results from ...
Diana O. Fisher, Roberto Salguero‐Gómez   +1 more
wiley   +1 more source