A5063502532- Fish Biology and Ecology Studies
- Fish biology, ecology, and behavior
- Ichthyology and Marine Biology
- Fish Ecology and Management Studies
- Marine and fisheries research
- Aquatic Ecosystems and Biodiversity
- Identification and Quantification in Food
- Morphological variations and asymmetry
- Amphibian and Reptile Biology
- Physiological and biochemical adaptations
- Evolution and Paleontology Studies
- Biomimetic flight and propulsion mechanisms
- Ocean Acidification Effects and Responses
- Marine animal studies overview
- Marine Bivalve and Aquaculture Studies
- Animal Diversity and Health Studies
- Genetics, Aging, and Longevity in Model Organisms
- Paleontology and Evolutionary Biology
- Aquaculture Nutrition and Growth
- Temporomandibular Joint Disorders
- Date Palm Research Studies
- Developmental Biology and Gene Regulation
- Structural Integrity and Reliability Analysis
- Coral and Marine Ecosystems Studies
- Animal Vocal Communication and Behavior
German Oceanographic Museum
2016-2025
University of Rostock
2021-2025
Albert Einstein College of Medicine
2024
Friedrich Schiller University Jena
2016-2021
University College London
2013
South African Institute for Aquatic Biodiversity
2013
Cornell University
2013
American Museum of Natural History
2013
Natural History Museum
2013
University of Würzburg
2005-2008
Despite African rivers containing high species diversity, continental-scale studies investigating the mechanisms generating biological diversity of riverine faunas are limited compared with lacustrine systems. To investigate build-up in a tropical aquatic continental radiation, we test different models lineage diversification and reconstruct biogeographic history species-rich siluriform genus, Synodontis (~130 species), broad distribution across all major drainage basins. The resulting...
Regular body scales of 80 species, belonging to 50 families and 16 orders marine teleost fishes common in the Mediterranean Sea are described using morphological morphometric characters. The descriptions based on scale’s type, shape, features anterior, posterior lateral fields. Further characteristics focus, circuli, radii spines or cteni, if present, given. Morphometric indices calculated for from anterior dorsal flank area each species. As scale shape varies along a given specimen,...
Abstract Elasmobranchs are key to a healthy marine ecosystem but under threat from human activities, such as destructive fisheries and shark finning. Embryos of oviparous elasmobranchs may be further challenged during development by rising temperatures falling dissolved oxygen concentrations in their intertidal environment. However, the impact climate change on survival growth is still poorly understood. Here, we investigate effects temperature hypoxia small‐spotted catshark ( Scyliorhinus...
Exposure to elevated temperatures during embryogenesis can influence the plasticity of tissues in later life. Despite these long-term changes plasticity, few differentially expressed genes are ever identified, suggesting that developmental programming life may occur through modulation other aspects transcriptomic architecture, such as gene network organisation. Here, we use modelling approaches demonstrate warm embryonic development (developmental warming) have consistent effects on...
The development of skeletal elements in fish is strongly influenced by the functional demands and environmental constraints they face during different life stages but mostly occurs their larval development. One example late modifications within system adaptation skull eye morphology that allows for amphibious vision four-eyed fishes Anableps spp. Another species equally capable simultaneous aquatic aerial vision, Rhinomugil corsula, has been widely neglected this field research, although it...
ABSTRACT In autumn 2017, an unusual mortality event of Baltic grey seals ( Halichoerus grypus ) occurred at the German coast. An alarming 23 carcasses healthy, well‐fed, male large were found in a confined area Greifswald Bay (Mecklenburg‐Western Pomerania) < 10 weeks from September to December. From 1997 2016, only total 30 seal along entire coast Mecklenburg‐Western Pomerania, with annual maximum eight 2014. Pathological investigations conducted on 19 seals, showing acute cardiac and...
Previous molecular studies on the phylogeny and classification of clupeocephalan fishes revealed numerous new taxonomic entities. For re-analysing these taxa, we perform target gene capturing subsequent next generation sequencing putative ortholog exons major lineages. Sequence information for RNA bait design was derived from publicly available genomes bony fishes. Newly acquired sequence data comprising > 800 exon sequences subsequently used phylogenetic reconstructions.Our results support...
Abstract Background The caudal fin of teleosts is a highly diverse morphological structure and valuable source information for comparative analyses. Within the Atherinomorpha high variation conditions caudal-fin skeleton can be found. These range from complex but basal configurations to simple yet derived configurations. When comparing atherinomorph taxa, it often difficult decide on homology skeletal elements if only considering adult specimens. However, observing development skeletons...
The Ovalentaria is a taxon of teleosts that has been proposed based on molecular analyses only. Previously widely separated families are assembled in this taxon. For the first time, analysed using comparative morphological approach. caudal-fin skeleton 355 species covering all 48 ovalentarian examined cleared and stained specimens, µCT datasets X-ray images as well from literature. A total 38 characters evaluated used for ancestral character state reconstructions phylogenetic analyses....
Gobies (Gobiidae + Oxudercidae) are among the largest groups of extant marine fishes. Fossils gobies abundant since Miocene, and many species have been reported so far. However, delimitation fossil goby is challenging because molecular markers diagnostic traits such as disposition sensory head papillae lost. This study provides, for first time, an actualistic framework identification species. We focus on characters that can in principle be recognized fossils, evaluate their ability to...
Background. Species identification from recovered fish scales, e.g., the sediment or stomach contents, has proven to be problematic for clupeid species. To ensure reliable species discrimination within Clupeidae, we attempted reveal inter- and intra-specific, as well as, intra-individual variability of scale shape in two sympatric European pilchard, Sardina pilchardus (Walbaum, 1792) round sardinella, Sardinella aurita Valenciennes, 1847. Our aim was test, whether landmark-based geometric...
The osteology of the three miniaturized African freshwater gonorynchiforms Cromeria nilotica, C. occidentalis and Grasseichthys gabonensis is investigated. We show that two species Cromeria, long considered to be subspecies, differ significantly in a number characters. This has some consequences because all recent studies relationships were based only on occidentalis. review previous osteological accounts discuss differences we encountered our material. In addition re-evaluate characters...
Abstract Within the fish taxon Mugiliformes, larval development of Mugil cephalus has been studied most intensively, because it widest range distribution among all mugilids and is interest to aquaculture over world. Although numerous studies have dealt with rearing, growth development, osteological M. mugiliforms in general largely neglected. Herein, we describe skeletal mullets for first time. Cleared double-stained specimens aquaculture-reared wild-caught mugilid larvae were examined early...
Abstract Otophysi is one of the most important fish taxa world, as they make up for roughly 28% all species and about two-thirds freshwater worldwide. To understand their success evolutionary history sister-group, Gonorynchiformes, take a key-position, e.g., reconstructing morphological conditions in latest common ancestors. Gonorynchiformes comprising only 40 have been often studied that reason. Their pelvic girdle, however, got little attention so far. Therefore, we this structure extant...
Abstract Marine fisheries are increasingly impacted by climate change, affecting species distribution and productivity, necessitating urgent adaptation efforts. Climate vulnerability assessments (CVA), integrating expert knowledge, vital for identifying that could thrive or suffer under changing environmental conditions. This study presents a first CVA the Western Baltic Sea's fish community, crucial fishing area Denmark Germany. Characterized unique mix of marine, brackish, freshwater...
To date, only limited results on the fatty composition in different tissues of top predators Baltic Sea are available. In current study, tissue samples blubber, skeletal muscle, and liver from 8 harbour porpoise (Phocoena phocoena) 17 grey seals (Halichoerus grypus) off Mecklenburg-Western Pomerania were included investigation. While total acid content blubber revealed no differences between both species, muscle was significantly differentand showed higher concentrations compared with seals....
The adipose fin is a structure with questionable function, for long time even regarded as rudimentary element without any function. A comparative study of development revealed two different modes: salmoniform-type where the develops directly from larval fold simultaneously other median fins. And characiform-type anew after reduction fold. Compared to first mode latter starts late in ontogeny, when all fins already have their shape, rays and colouration. contradicts view that this just...
The small-spotted catshark, Scyliorhinus canicula, provides an optimal model organism to include chondrichthyans in studies comparing morphology or physiology through vertebrate evolution. In particular, for investigations with ontogenetic aspects, there are only a limited number of alternative taxa. Therefore, detailed staging system is prerequisite allowing comparison between different studies. This study supplements information on the latest stages established by Ballard and colleagues...
Brevimyrus niger is reported to breathe atmospheric air, confirming previous documentation of air breathing in this species. Air taken up by rising the water surface and gulping, or permanently resting just below surface, depending on environmental conditions.
The electric organ discharges (EODs) of five mormyrid species (Marcusenius senegalensis, Brevimyrus niger, Petrocephalus bovei, Pollimyrus isidori, Hippopotamyrus pictus) from different sampling sites the Upper Volta system in West Africa were investigated. EOD waveforms recorded at high rates order to compare signal waveform parameters locations. Except for H. pictus, EODs within a differed significantly one another some and variability least between sites. In addition, each showed...
Abstract Eighteen captive small‐spotted catsharks Scyliorhinus canicula were successfully identified from hatching to 1 year of age using the free computer recognition software, I 3 S classic. The effect increasing time interval between attempts on accuracy software was investigated, revealing that fiedelity decreases with intervals for younger (0 15 weeks), but not older (15 weeks onwards) sharks. Identification by validated genetic analyses seven microsatellite markers, a 100% success...