A5052316634- Marine Invertebrate Physiology and Ecology
- Coral and Marine Ecosystems Studies
- Photoreceptor and optogenetics research
- Cephalopods and Marine Biology
- Neurobiology and Insect Physiology Research
- Connexins and lens biology
- Crustacean biology and ecology
- Zebrafish Biomedical Research Applications
- Marine Sponges and Natural Products
- Marine Ecology and Invasive Species
- Marine Biology and Ecology Research
- Echinoderm biology and ecology
- Ichthyology and Marine Biology
- Microplastics and Plastic Pollution
- Retinal Development and Disorders
- Marine and coastal plant biology
- Insect and Arachnid Ecology and Behavior
- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine Toxins and Detection Methods
- Fish biology, ecology, and behavior
- Yersinia bacterium, plague, ectoparasites research
- Physiological and biochemical adaptations
- Venomous Animal Envenomation and Studies
- Bat Biology and Ecology Studies
- Planarian Biology and Electrostimulation
University of Copenhagen
2014-2024
Natural History Museum Aarhus
2018
Instituto da Conservação da Natureza e das Florestas
2018
Natural History Museum of Denmark
2018
Universitat Autònoma de Barcelona
2018
Lund University
2004-2010
Microplastic is considered a potential threat to marine life as it ingested by wide variety of species. Most studies on microplastic ingestion are short-term investigations and little currently known about how this has developed over the last decades where global plastic production increased exponentially. Here we present first long-term study in environment, covering three from 1987 2015, based unique sample set originally collected conserved for food web studies. We investigated...
The crustacean cuticle has numerous projections and some of these projections, the setae, have important mechanical as well sensory functions. setae display a wide diversity in their external morphology, which led to great problems separating from other making consistent classification system. Here, cuticular on mouthparts seven species decapods are examined by scanning transmission electron microscopy. A new definition is given: seta an elongate projection with more or less circular base...
SUMMARY Box jellyfish, cubomedusae, possess an impressive total of 24 eyes four morphologically different types. Two these eye types, called the upper and lower lens eyes, are camera-type with spherical fish-like lenses. Compared other cnidarians, cubomedusae also have elaborate behavioral repertoire, which seems to be predominantly visually guided. Still, positive phototaxis is only behavior described so far that likely correlated eyes. We explored obstacle avoidance response Caribbean...
Most known starfish species possess a compound eye at the tip of each arm, which, except for lack true optics, resembles an arthropod eye. Although these eyes have been about two centuries, no visually guided behaviour has ever directly associated with their presence. There are indications that they involved in negative phototaxis but this may also be governed by extraocular photoreceptors. Here, we show coral-reef-associated Linckia laevigata slow and colour blind. The capable image...
Tools for high throughput sequencing and de novo assembly make the analysis of transcriptomes (i.e. suite genes expressed in a tissue) feasible almost any organism. Yet challenge biologists is that it can be difficult to assign identities gene sequences, especially from non-model organisms. Phylogenetic analyses are one useful method assigning these but such methods tend time-consuming because need re-calculate trees every interest each time new data set analyzed. In response, we employed...
Marine microdebris, in particular microplastics (plastics <5 mm), has become an issue of international concern due to its prevalence, persistence and potential adverse impacts on marine ecosystems. Informing source reduction based ecological effects requires understanding the origin, distribution characteristics microdebris interactions with organisms. Here we show widespread contamination central Great Barrier Reef environment microfibres comprising 86% all items detected. Microdebris...
Abstract The mouthpart setae of seven species decapods were examined with macro‐video recordings and scanning electron microscopy. general mechanical (nonsensory) functions the different mouthparts are described an account their setation is given. This offers possibility to determine types setae. Pappose do not participate in food handling but make setal barriers. Plumose likewise contact objects assist current generation. Papposerrate rare they seen pushing particles into mouth. Serrulate...
Cubozoan medusae have a stereotypic set of 24 eyes, some which are structurally similar to vertebrate and cephalopod eyes. Across the approximately 25 described species, this eyes varies surprisingly little, suggesting that they involved in an equally visual tasks. During day Tripedalia cystophora is found at edge mangrove lagoons where it accumulates close surface sun-lit patches between prop roots. Copula sivickisi (formerly named Carybdea sivickisi) associated with coral reefs has been...
Photoreception in echinoderms has been known for over 200 years, but their visual capabilities remain poorly understood. As reported some asteroids, the crown-of-thorns starfish (Acanthaster planci) possess a seemingly advanced eye at tip of each its 7–23 arms. With such an array eyes, can integrate wide field view surroundings. We hypothesise that, close range, orientation and directional movements are visually guided. In this study, eyes vision A. planci were examined by means light...
Abstract Cubomedusae, or box jellyfish, have the most elaborate visual system of all cnidarians. They 24 eyes four morphological types, distributed on sensory structures called rhopalia. Box jellyfish also display complex, probably visually guided behaviors such as obstacle avoidance and fast directional swimming. Here we describe strikingly complex partially bilaterally symmetrical nervous found in each rhopalium Tripedalia cystophora , present rhopalial neuroanatomy an atlas‐like series...
SUMMARY At night the Namib Desert spider Leucorchestris arenicola performs long-distance homing across its sand dune habitat. By disabling all or pairs of spiders' eight eyes we found that ability was severely reduced when vision fully abolished. Vision, therefore, seems to play a key role in nocturnal navigational performances L. arenicola. After excluding two three eyes, spiders were be able navigate successfully using only their lateral anterior median eyes. Measurement eyes' visual...
Abstract Thoracic cirripedes are sessile crustaceans that use six pairs of thoracic appendages (the cirri) to catch and handle food. We used scanning electron microscopy examine the cirri, which include one three maxillipeds in species thoracican barnacles, search correlations between cirral setation feeding mode. The studied comprise both pedunculate forms represent a wide range marine habitats as well morphologies, viz., Ibla cumingi , Octolasmis warwickii Capitulum mitella Pollicipes...
Like all other cnidarian medusae, box jellyfish propel themselves through the water by contracting their bell-shaped body in discrete swim pulses. These pulses are controlled a pacemaker system situated sensory structures, rhopalia. Each medusa has four rhopalia each with similar set of six eyes morphologically different types. We have examined how eye types influences pacemaker. Multiple photoreceptor systems, three types, plus rhopalial neuropil, affect The lower lens inhibits when...
A growing body of work on the neuroethology cubozoans is based largely capabilities photoreceptive tissues, and it important to determine molecular basis their light sensitivity. The rely 24 special purpose eyes extract specific information from a complex visual scene guide behavior in habitat. lens are most studied structures, phototransduction photoreceptor cells sensitive opsin molecules. Opsins photosensitive transmembrane proteins associated with photoreceptors eyes, amino acid sequence...
Quantifying gene expression across convergent origins of traits clarifies the degree to which those arise from shared versus distinct genetic programs, revealing how re-use relates repeatability evolution. Eyes are important that evolved in many distantly related lineages, including at least nine times within cnidarians. Here, we investigate eye-bearing and non-visual tissues three cnidarian species representing long-diverged lineages where eyes convergently (Cubozoa, Scyphozoa, Hydrozoa)....
SUMMARY Box jellyfish, or cubomedusae (class Cubozoa), are unique among the Cnidaria in possessing lens eyes similar morphology to those of vertebrates and cephalopods. Although these were described over 100 years ago, there has been no work done on their electrophysiological responses light. We used an electroretinogram (ERG) technique measure spectral sensitivity Caribbean species Tripedalia cystophora. The have two kinds eyes, lower upper eyes. found that both eye types sensitivities,...