Timo Moritz
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View article: Growth and Developmental Processes Alternate During Larval Development of Atlantic Herring
Growth and Developmental Processes Alternate During Larval Development of Atlantic Herring Open
During their development, fish pass through a series of developmental processes advancing, for example, their physiological and locomotive abilities. In particular, many marine fish larvae often hatch at an (semi‐) embryonic developmental …
View article: By‐Catch of Grey Seals in Fish Traps in the German Baltic Sea—From Incidents to Mitigation and Fisheries Regulation
By‐Catch of Grey Seals in Fish Traps in the German Baltic Sea—From Incidents to Mitigation and Fisheries Regulation Open
In autumn 2017, an unusual mortality event of Baltic grey seals ( Halichoerus grypus grypus ) occurred at the German Baltic coast. An alarming 23 carcasses of healthy, well‐fed, male large grey seals were found in a confined area in the Gr…
View article: Development of convergent adaptations reveal highly conserved early ontogenetic skull shape in fishes with amphibious vision
Development of convergent adaptations reveal highly conserved early ontogenetic skull shape in fishes with amphibious vision Open
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 during their larval development. One example of late modif…
View article: A climate vulnerability assessment of the fish community in the Western Baltic Sea
A climate vulnerability assessment of the fish community in the Western Baltic Sea Open
Marine fisheries are increasingly impacted by climate change, affecting species distribution and productivity, and necessitating urgent adaptation efforts. Climate vulnerability assessments (CVA), integrating expert knowledge, are vital fo…
View article: The pelvic girdle in extant gonorynchiformes (Teleostei: Otomorpha)
The pelvic girdle in extant gonorynchiformes (Teleostei: Otomorpha) Open
Otophysi is one of the most important fish taxa of the world, as they make up for roughly 28% of all fish species and about two-thirds of all freshwater species worldwide. To understand their success and evolutionary history their sister-g…
View article: Warming during embryogenesis induces a lasting transcriptomic signature in fishes
Warming during embryogenesis induces a lasting transcriptomic signature in fishes Open
Exposure to elevated temperatures during embryogenesis can influence the plasticity of tissues in later life. Despite these long-term changes in plasticity, few differentially expressed genes are ever identified, suggesting that the develo…
View article: Ontogeny reveals the origin of Gemminger bones in Mormyridae
Ontogeny reveals the origin of Gemminger bones in Mormyridae Open
Mormyridae are well known and intensively studied for their weak electric organ discharges, which facilitate communication and orientation. The Gemminger bones of Mormyridae are located next to the electrical organ in the caudal peduncle; …
View article: A staging system for Atlantic herring (<scp><i>Clupea harengus</i></scp>) larvae based on external morphology and skeletal development
A staging system for Atlantic herring (<span><i>Clupea harengus</i></span>) larvae based on external morphology and skeletal development Open
Atlantic herring ( Clupea harengus ) plays a key role within temperate marine food webs and is targeted by a significant over‐regional fishery. Due to its high economic importance, dynamics in herring stock biomass and recruitment are clos…
View article: A true caudal fin or not? New insights in the evolution of the gadiform caudal fin
A true caudal fin or not? New insights in the evolution of the gadiform caudal fin Open
The distinctive caudal-fin skeleton of gadiforms has puzzled scientists for a long time, because of its many differences in comparison to other teleosts. Contradicting hypotheses interpreted this structure as (i) a highly derived teleostea…
View article: Development of the dorsal and anal fin in <i>Kneria stappersii</i> (Otomorpha: Gonorynchiformes)
Development of the dorsal and anal fin in <i>Kneria stappersii</i> (Otomorpha: Gonorynchiformes) Open
The order Gonorynchiformes was repeatedly studied to gain new insights into the evolution of its sister‐taxon, the Otophysi, the most successful freshwater fish taxon worldwide. Previous ontogenetic studies of gonorynchiforms mainly focuse…
View article: Pre-Hatching Ontogenetic Changes of Morphological Characters of Small-Spotted Catshark (Scyliorhinus canicula)
Pre-Hatching Ontogenetic Changes of Morphological Characters of Small-Spotted Catshark (Scyliorhinus canicula) Open
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…
View article: Morphological characters in light of new molecular phylogenies: the caudal-fin skeleton of Ovalentaria
Morphological characters in light of new molecular phylogenies: the caudal-fin skeleton of Ovalentaria Open
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, the Ovalentaria are analysed using a comparative morpholo…
View article: The accessory neural arch: development, morphology, and systematic distribution
The accessory neural arch: development, morphology, and systematic distribution Open
The accessory neural arch is an oddly distributed character present in several non-acanthomorph teleostean taxa. Its homology was often implied but never satisfyingly tested. In this study, we attended this pending problem. We analyzed the…
View article: Warming During Embryogenesis Induces a Lasting Transcriptomic Signature in Fishes
Warming During Embryogenesis Induces a Lasting Transcriptomic Signature in Fishes Open
Exposure to elevated temperatures during embryogenesis can influence the plasticity of tissues in later-life. Despite these long-term changes in plasticity, few differentially expressed genes are ever identified, suggesting that the develo…
View article: RScript and data matrices from Morphological characters in light of new molecular phylogenies: the caudal-fin skeleton of Ovalentaria
RScript and data matrices from Morphological characters in light of new molecular phylogenies: the caudal-fin skeleton of Ovalentaria Open
RScript used for the ancestral character state estimation. Data Matrices for phylogenetic analyses and ancestral character state estimation.
View article: Postcranial skeletal development of <i>Mugil cephalus</i> (Teleostei: Mugiliformes): morphological and life-history implications for Mugiliformes
Postcranial skeletal development of <i>Mugil cephalus</i> (Teleostei: Mugiliformes): morphological and life-history implications for Mugiliformes Open
Within the fish taxon Mugiliformes, the larval development of Mugil cephalus has been studied most intensively, because it has the widest range of distribution among all mugilids and is of interest to aquaculture all over the world. Althou…
View article: Fatty Acid Composition in Blubber, Liver, and Muscle of Marine Mammals in the Southern Baltic Sea
Fatty Acid Composition in Blubber, Liver, and Muscle of Marine Mammals in the Southern Baltic Sea Open
To date, only limited results on the fatty composition in different tissues of the top predators in the Baltic Sea are available. In the current study, tissue samples of blubber, skeletal muscle, and liver from 8 harbour porpoise (Phocoena…
View article: <scp>Ocean warming and hypoxia affect embryonic growth</scp>, <scp>fitness and survival of small‐spotted catsharks</scp>, <i>Scyliorhinus canicula</i>
<span>Ocean warming and hypoxia affect embryonic growth</span>, <span>fitness and survival of small‐spotted catsharks</span>, <i>Scyliorhinus canicula</i> Open
Elasmobranchs are key to a healthy marine ecosystem but are under threat from human activities, such as destructive fisheries and shark finning. Embryos of oviparous elasmobranchs may be further challenged during development by rising temp…
View article: Identification of past and present gobies: distinguishing Gobius and Pomatoschistus (Teleostei: Gobioidei) species using characters of otoliths, meristics and body morphometry
Identification of past and present gobies: distinguishing Gobius and Pomatoschistus (Teleostei: Gobioidei) species using characters of otoliths, meristics and body morphometry Open
Gobies (Gobiidae + Oxudercidae) are among the largest groups of extant marine fishes. Fossils of gobies are abundant since the Miocene, and many species have been reported so far. However, delimitation of fossil goby species is challenging…
View article: The osteology of the golden grey mullet <scp><i>Liza aurata</i></scp> (Teleostei: Mugiliformes: Mugilidae) including interactive three‐dimensional reconstructions
The osteology of the golden grey mullet <span><i>Liza aurata</i></span> (Teleostei: Mugiliformes: Mugilidae) including interactive three‐dimensional reconstructions Open
Grey mullets are remarkably characterized by their overall uniform external morphology. Identifying species as well as positioning the Mugiliformes in a phylogenetic context is rather difficult. Most recently they were placed in the newly …
View article: Twins! Microsatellite analysis of two embryos within one egg case in oviparous elasmobranchs
Twins! Microsatellite analysis of two embryos within one egg case in oviparous elasmobranchs Open
Elasmobranchs display various reproductive modes, which have been key to their evolutionary success. In recent decades there has been a rise in the number of reported cases of foetal abnormalities including fertilised, double-embryos held …
View article: Recognition software successfully aids the identification of individual small‐spotted catsharks <i>Scyliorhinus canicula</i> during their first year of life
Recognition software successfully aids the identification of individual small‐spotted catsharks <i>Scyliorhinus canicula</i> during their first year of life Open
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 of increasing the time interval between reco…
View article: First record of the Short-tailed Pipefish, Microphis brachyurus lineatus (Kaup, 1856) (Syngnathidae, Nerophinae), for Suriname
First record of the Short-tailed Pipefish, Microphis brachyurus lineatus (Kaup, 1856) (Syngnathidae, Nerophinae), for Suriname Open
The occurrence of the pipefish Microphis brachyurus (Bleecker, 1854) in Suriname is reported here for the first time. The records include 3 specimens from the lower Suriname River at Overbridge, collected from a reach in the river with fre…
View article: Unexpected diversity of median caudal cartilages in teleosts
Unexpected diversity of median caudal cartilages in teleosts Open
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View article: A phylogenomic approach to reconstruct interrelationships of main clupeocephalan lineages with a critical discussion of morphological apomorphies
A phylogenomic approach to reconstruct interrelationships of main clupeocephalan lineages with a critical discussion of morphological apomorphies Open
Several proposed monophyla defined by morphological apomorphies within the Clupeocephalan phylogeny are confirmed by the phylogenetic estimates presented herein. However, other morphologically described groups cannot be reconciled with mol…
View article: Fish scale identification: From individual to species-specific shape variability
Fish scale identification: From individual to species-specific shape variability Open
Background. Species identification from recovered fish scales, e.g., from the sediment or stomach contents, has proven to be problematic for clupeid species. To ensure reliable species discrimination within Clupeidae, we attempted to revea…
View article: Lessons from the first dorsal fin in atheriniforms—A new mode of dorsal fin development and its phylogenetic implications
Lessons from the first dorsal fin in atheriniforms—A new mode of dorsal fin development and its phylogenetic implications Open
The median fins in extant actinopterygians are the product of millions of years of evolution. During this time, different developmental patterns for the dorsal and anal fins emerged leading to a high variation in median fin morphology and …
View article: A scale atlas for common Mediterranean teleost fishes
A scale atlas for common Mediterranean teleost fishes Open
Regular body scales of 80 species, belonging to 50 families and 16 orders of marine teleost fishes common in the Mediterranean Sea are described using morphological and morphometric characters. The morphological descriptions are based on t…