Peter Warth

State Museum of Natural History Stuttgart | SMNS

Heterochronic shifts are regarded one of the major evolutionary changes acting on developmental modules and underlying the origin of morphological disparity. Conserved characters, rarely subject to heterochronic shifts during the curse of evolution, in contrast could indicate underlying developmental or functional constraints. Here we use the devel...

Heterochronic shifts are regarded one of the major evolutionary changes acting on developmental modules and underlying the origin of morphological disparity. Conserved characters, rarely subject to heterochronic shifts during the curse of evolution, in contrast could indicate underlying developmental or functional constraints. Here we use the devel...

Arctozenus risso, the White Barracudina, is a member of the Paralepididae, the largest family within the order Aulopiformes. In recent years the systematics of the family and the order has advanced significantly due to morphological, molecular, and holistic studies, which has led to a general agreement of their relationships. Some phylogenetic disc...

Final report of a multi-methodological approach to evaluate the fish protection and bypass system at a hydro power plant in the river Neckar (Germany). Method evaluation of net catches, sonar imaging, radio telemetry, RFID telemetry, fish injection and injury investigation protocol.

Background The caudal fin of teleosts is a highly diverse morphological structure and a valuable source of information for comparative analyses. Within the Atherinomorpha a high variation of conditions of the caudal-fin skeleton can be found. These range from complex but basal configurations to simple yet derived configurations. When comparing athe...

Water Vortex Power Plants (WVPP) are small hydroelectric power plants for exploiting the hydropower potential at locations with low heads and discharges. Marketed as “fish friendly” facilities, they allow fish to migrate in up- and downstream directions. Within the scope of a Federal Ministry of Education and Research (BMBF) funded research project...

Fact Sheet - Methodological approaches for assessing injury and mortality risk of fish during passage of hydro power plants with focus on mark recapture experiments.

Key messages » Studies to determine the risk of injury to fish at hydropower sites should consider the comparability of results. » This requires a minimum of methodological standardisation. A uniform protocol for recording injuries is a basic prerequisite for this. » Experimental studies with, individually marked fish guarantee reliable data an...

Water vortex power plants (WVPP) are small hydroelectric power plants for exploiting the hydropower potential at locations with low heads and discharges. Marketed as “fish friendly” facilities, they allow fish to migrate in up- and downstream directions. Within the scope of a BMBF funded research project, the Technische Universität Dresden develope...

Acta Zoologica has played a key role as a publishing outlet for advancing zoological knowledge since its foundation in 1920 by Nils Holmgren. With the journal celebrating its centennial, we have assembled a virtual issue that celebrates some of the morphological highlights from the history of Acta Zoologica, which has been a venue for precise and d...

The evaluation of the efficiency of fish protection systems at hydropower plants (HPP) is crucial for technical progress and knowledge required to improve the connectivity in rivers. Therefore, methodological standards are necessary. In a research project on the Neckar river, the “Guidelines for the evaluation of fish protection and downstream pass...

The vertebrate head/trunk interface is the region of the body where the different developmental programs of the head and trunk come in contact. Many anatomical structures that develop in this transition zone differ from similar structures in the head or the trunk. This is best exemplified by the cucullaris/trapezius muscle, spanning the head/trunk...

The skeleton of the jaws and neurocranium of sturgeons (Acipenseridae) are connected only through the hyoid arch. This arrangement allows considerable protrusion and retraction of the jaws and is highly specialized among ray-finned fishes (Actinopterygii). To better understand the unique morphology and the evolution of the jaw apparatus in Acipense...

The head is considered the major novelty of the vertebrates and directly linked to their evolutionary success. Its form and development as well as its function, for example in feeding, is of major interest for evolutionary biologists. In this study, we describe the skeletal development of the cranium and pectoral girdle in Siberian (Acipenser baeri...

Walter Bruno Eggert described nine species and fifteen subspecies of the oxudercine genus Periophthalmus in 1929 and 1935. His descriptions were based primarily on specimens collected by Jürgen Wilhelm Harms during several expeditions to South-east Asia and Japan. The whereabouts of many of the type specimens were unknown, and were presumed destroy...

An outlook on the developmental anatomy of the Turquoise killifish, Nothobranchius furzeri

This is the first in a planned series of studies in which we examine the cranial muscle ontogeny of exemplar taxa of actinopterygian clades to obtain a better understanding of the evolution of the cranial musculoskeletal system within the Actinopterygii. The Longnose Gar, Lepisosteus osseus, is a member of the basal actinopterygian family Lepisoste...