8 Works

Data from: Nest association between two predators as a behavioral response to the low density of rodents

Ivan Pokrovsky, Dorothée Ehrich, Rolf Anker Ims, Ivan Fufachev, Olga Kulikova, Aleksandr Sokolov, Natalia Sokolova, Vasily Sokolov & Nigel Gilles Yoccoz
Many birds nest in association with aggressive birds of other species to benefit from their protection against predators. We hypothesized that the protective effect also could extend to foraging resources, whereby the resultant resource enriched habitats near a nest of aggressive raptors could be an alternative cause of associations between nesting bird species with non-overlapping foraging niches. In the Arctic, the Rough-legged Hawk (Buteo lagopus) and the Peregrine Falcon (Falco peregrinus) are 2 raptor species...

Affiliation history and age similarity predict alliance formation in adult male bottlenose dolphins

Livia Gerber, Richard Connor, Stephanie King, Simon Allen, Samuel Wittwer, Manuela Bizzozzero, Whitney Friedman, Stephanie Kalberer, William Sherwin, Sonja Wild, Erik Willems & Michael Kruetzen
Male alliances are an intriguing phenomenon in the context of reproduction since, in most taxa, males compete over an indivisible resource, female fertilization. Adult male bottlenose dolphins (Tursiops aduncus) in Shark Bay, Western Australia, form long-term, multi-level alliances to sequester estrus females. These alliances are therefore critical to male reproductive success. Yet, the long-term processes leading to the formation of such complex social bonds are still poorly understood. To identify the criteria by which male...

Data from: Diving into divergence: differentiation in swimming performances, physiology and gene expression between locally-adapted sympatric cichlid fishes

Francesca Raffini, Ralf Schneider, Paolo Franchini, Andreas Kautt & Axel Meyer
Sympatric speciation occurs without strict vicariance and is thought to often be driven by ecological specialization of subpopulations that eventually diverge genetically and phenotypically. Distinct morphologies between sympatric populations occupying different niches have been interpreted as such differentiating adaptive phenotypes, yet differences in performance and thus adaptiveness between them were rarely tested. Here, we investigated if divergent body shapes of two sympatric crater lake cichlid species from Nicaragua, one being a shore-associated (benthic) species while...

Data from: Nitrogen acquisition of Central European herbaceous plants that differ in their global naturalization success

Yanjie Liu, Mark Van Kleunen & Mark Kleunen
It is frequently assumed that species capable of fast nitrogen (N) acquisition under different N-availability conditions should have a higher establishment success after their introduction into new regions. However, few experimental studies have explicitly tested this. Our multispecies experiment tested whether global naturalization success of plant species native to Central Europe is related to a high N-acquisition ability. We selected 41 common herbaceous species native to Germany that have all become naturalized, and thus been...

Data from: Resilience to changes in lake trophic state: nutrient allocation into Daphnia resting eggs

Jana Isanta Navarro
During past decades, many lakes underwent drastic human-caused changes in trophic state with strong implications for population dynamics and food web processes. We investigated the influence of trophic state on nutrient allocation into Daphnia resting eggs. The production of resting eggs is an important survival strategy, allowing Daphnia to cope with unfavorable environmental conditions. Allocation of essential nutrients into resting eggs may crucially influence embryonic development and offspring survival and thus is of great ecological...

Data from: Rearing temperature and fatty acid supplementation jointly affect lipid fluorescence polarization and heat tolerance in Daphnia

Dominik Martin-Creuzburg, Bret L. Coggins, Dieter Ebert & Lev Yampolsky
The homeoviscous adaptation hypothesis states that the relative abundance of polyunsaturated fatty acids (PUFAs) in membrane phospholipids of ectothermic organisms decreases with increasing temperatures to maintain vital membrane properties. We reared Daphnia magna at 15°, 20°, and 25°C and increasing dietary concentrations of the long-chain PUFA eicosapentaenoic acid (EPA) to test the hypothesis that the well-documented increase in heat tolerance of high-temperature-reared Daphnia is due to a reduction in body PUFA concentrations. Heat tolerance was...

Data from: Pleiotropic jaw morphology links the evolution of mechanical modularity and functional feeding convergence in Lake Malawi Cichlids

C. Darrin Hulsey, Michael E. Alfaro, Jimmy Zheng, Axel Meyer & Roi Holzman
Complexity in how mechanistic variation translates into ecological novelty could be critical to organismal diversification. For instance, when multiple distinct morphologies can generate the same mechanical or functional phenotype this could mitigate tradeoffs and/or provide alternative ways to meet the same ecological challenge. To investigate how this type of complexity shapes diversity in a classic adaptive radiation, we tested several evolutionary consequences of the anterior jaw four-bar linkage for Lake Malawi cichlid trophic diversification. Using...

Data from: Social foraging extends associative odor-food memory expression in an automated learning assay for Drosophila melanogaster

Aarti Sehdev, Yunusa Mohammed, Cansu Tafrali & Paul Szyszka
Animals socially interact during foraging and share information about the quality and location of food sources. The mechanisms of social information transfer during foraging have been mostly studied at the behavioral level, and its underlying neural mechanisms are largely unknown. Fruit flies have become a model for studying the neural bases of social information transfer, because they provide a large genetic toolbox to monitor and manipulate neuronal activity, and they show a rich repertoire of...

Registration Year

  • 2019
    8

Resource Types

  • Dataset
    8

Affiliations

  • University of Konstanz
    8
  • Max Planck Institute for Ornithology
    1
  • Frankfurt Zoological Society
    1
  • University of Massachusetts Dartmouth
    1
  • The Arctic University of Norway
    1
  • University of Otago
    1
  • University of Zurich
    1
  • University of Basel
    1
  • University of California, Santa Barbara
    1
  • Institute of Plant and Animal Ecology
    1