A5012750586- Marine Invertebrate Physiology and Ecology
- Marine Ecology and Invasive Species
- Nonlinear Dynamics and Pattern Formation
- Parasite Biology and Host Interactions
- Marine Biology and Ecology Research
- Micro and Nano Robotics
- Marine Toxins and Detection Methods
- Yersinia bacterium, plague, ectoparasites research
- Coral and Marine Ecosystems Studies
- Leech Biology and Applications
- Marine and fisheries research
- Slime Mold and Myxomycetes Research
- Marine Sponges and Natural Products
- Marine Biology and Environmental Chemistry
- Ethics in Clinical Research
- Environmental DNA in Biodiversity Studies
- Joseph Conrad and Literature
- Marine and coastal ecosystems
- Photoreceptor and optogenetics research
- Forensic and Genetic Research
- Aquatic Ecosystems and Phytoplankton Dynamics
- Cephalopods and Marine Biology
- Evolution and Genetic Dynamics
University of the Western Cape
2019-2024
Tel Aviv University
2019-2024
University of Haifa
2015-2023
California Maritime Academy
2015
A new species of the cosmopolitan jellyfish genus Aurelia is described from coastal waters Mozambique using a combination morphological, meristic and genetic information (COI 18S). The can be separated congeners that have been recently by bell shape, number canal origins anastomoses, shape manubrium oral arms. Three types nematocysts are present in tissues both margin arms, this description cnidome will allow for future comparison. Pairwise comparisons showed mean COI divergence 4.8% within...
Abstract Jellyfish (JF) swarms impact human wellbeing and marine ecosystems. Their global proliferation is a matter of concern scientific debate, the multitude factors affecting (and affected by) their density distribution merits long-term monitoring populations. Here we present an eight-year time series for Rhopilema nomadica, most prominent JF species swarming Eastern Mediterranean Sea. Reports were submitted by public within it group trained participants via internet website between June...
This paper is a collection of novel distributional records 20 species belonging to 8 phyla (Chlorophyta, Rhodophyta, Cnidaria, Ctenophora, Annelida, Mollusca, Arthropoda and Chordata) from 11 Mediterranean countries, namely, Spain: an additional record the Canary dentex Dentex canariensis reported Spain (Valencia), this northernmost in Mediterranean; Algeria: first documented Caulerpa chemnitzia Algerian coast; France: Spotted sea hare Aplysia dactylomela eastern coast Corsica; Italy:...
We propose a model for the structure formation of jellyfish swimming based on active Brownian particles. address phenomena counter-current swimming, avoidance turbulent flow regions and foraging. motivate corresponding mechanisms from observations swarming reported in literature incorporate them into generic modelling framework. The characteristics is tested three paradigmatic environments.
Applying a proteomic approach for biomonitoring marine environments offers useful tool identifying organisms' stress responses, with benthic filter-feeders being ideal candidates this practice. Here, we investigated the profile of two solitary ascidians (Chordata, Ascidiacea): Microcosmus exasperatus, collected from five sites along Mediterranean coast Israel; and Polycarpa mytiligera four Red Sea coast. 193 13 proteins in M. exasperatus P. mytiligera, respectively, demonstrated significant...
Abstract Since the mid-1980s, swarms of rhizostome Rhopilema nomadica have been an annual phenomenon in Israeli Mediterranean coastal waters during summer months. Despite its prominence and potential impact on food webs ecosystem services, studies concerning feeding ecology interactions with other biota marine web not conducted. During 2015 gut contents 41 R. were analysed as well ambient plankton assemblages. More than 60% medusae diet was found to consist microzooplankton <150 μm. Size...
A series of feeding trials was carried out, offering planula larvae Cyanea capillata to three potential predators, Mnemiopsis leidyi, Mytilus edulis and Ciona intestinalis, alone or mixed with algae copepods. Mussels ascidians consumed planulae in significant numbers all prey combination trials, whereas ctenophores did so only when were offered as sole prey. These results suggest that grazing pressure on scyphozoan may play an important role regulating medusa blooms.
We present a model of active Brownian particles for the process jellyfish swarm formation. The motivation our analysis is phenomenon blooming in natural habitats and clustering laboratory tanks which follow from an interplay physical behavioral mechanisms. reach conclusion that phase separation at low density induced by reactions to environmental conditions. Dense regions are then maintained self-induced stimuli result recruitment process. Our results agree with biological fact exhibit...
Jellyfish (cnidarians and ctenophores) affect the marine food web through high feeding rates efficiency, but in contrast to their great importance ecosystem, our knowledge of dietary requirements is limited. Here we present results respiratory trials rhizostome Rhopilema nomadica, dominant scyphozoan waters Eastern Mediterranean, which often establishes massive swarms, mainly summer months. Through multiple measurements oxygen demand R. nomadica at bell diameters 3–49 mm, were able assess...
We present a theory of jellyfish swarm formation and exemplify it with simulations active Brownian particles. The motivation for our analysis is the phenomenon blooms in ocean clustering tank experiments. argue that such clusters emerge due to an externally induced phase transition density, as convergent flows, which then maintained amplified by self-induced stimuli. Our study introduces three mechanisms relevant better understanding blooming have not been taken into account before are...
The collection and preservation of biological material before DNA analysis is critical for inter alia biomedical research, medical diagnostics, forensics biodiversity conservation. In this study, we evaluate an in-house formulated buffer called the Forensic Laboratory-buffer (FDL-buffer) long term at room temperature. Human saliva stored in 8 years, human blood 3 years delicate animal tissues from jellyfish
Abstract Since it was first observed in Israel the 1970s, ‘nomad jellyfish’ Rhopilema nomadica has established a reputation as one of worst invasive species Mediterranean Sea. It assumed to originate Red Sea, or Indo-Pacific region, but absence additional reports live specimens outside Mediterranean, its origins remained mystery. Here, via molecular analysis, we present verified results existence R. Western Indian Ocean. Moreover, using evidence from Cassiopea andromeda and , propose that...
We propose a model for the structure formation of jellyfish swimming based on active Brownian particles. address phenomena counter-current swimming, avoidance turbulent flow regions and foraging. motivate corresponding mechanisms from observations swarming reported in literature incorporate them into generic modelling framework. The characteristics is tested three paradigmatic environments.