Results 91 to 100 of about 7,683 (208)

Intraspecific predation in immature Coenagrion puella (L.): a switch in food selection? (Zygoptera: Coenagrionidae) [PDF]

, 1997
Observations on cannibalism in outdoor insectaries are presented. The behavioural interactions are described. Cannibalism (in both sexes) occurred only during periods of cold weather.
Kröger, C., Rolff, Jens
core   +1 more source

Inconsistent effects of P enrichment and predator presence on food‐web dynamics in a bromeliad system

Oikos, Volume 2026, Issue 3, March 2026.
Food webs consist of trophic interactions of variable strength. However, it remains challenging to predict how changes in environmental conditions, such as nutrient enrichment, can affect these interactions. In this paper, we propose to integrate food web theory with ecological stoichiometry, which predicts how elemental ratios affect trophic ...
Pierre Rogy, Vinicius F. Farjalla, Amy E. Deacon, Joseph Luiz dos Santos Ferro, Mark P. Nessel, Delezia S. Singh, Diane S. Srivastava   +6 more
wiley   +1 more source

Diversity of damselflies (Zygoptera) in Gorewada International Bio- Park, Nagpur, Central India [PDF]

Arthropods, 2014
Gorewada International Bio-Park consists of a lake as a major water source, marshy shore and heterogeneity in vegetation. Its geographical location is 21o11'N 79o2'E. Observations are made through walking line transects along the lake border to determine
Patil Kishor Gopal, Shende Virendra Abaji, Uke Shrikant Bhimrao   +2 more
doaj  

Global Biodiversity Framework Targets Can Drive Action on Insect Declines, but Lack Robust Indicators to Prove Their Effectiveness

Conservation Letters, Volume 19, Issue 2, March/April 2026.
ABSTRACT Insects are the most diverse and functionally important animals on Earth. In at least some regions, terrestrial populations are declining. Despite this, insects are often overlooked in conservation policy, and it is difficult to assess how anthropogenic threats and conservation actions affect insect populations.
Andrew J. Bladon, Perpetra Akite, Shawan Chowdhury, Federico Riva, Rob Cooke, Ellie E. Dyer, Joseph Millard, Charlotte L. Outhwaite, James G. Rodger, Cang Hui, Justin E. Isip, J. Iwan Jones, John F. Murphy, Tim Newbold, Andy Purvis, Helen E. Roy, Grace Skinner, Ben A. Woodcock, Iris Berger, Sayam U. Chowdhury, William H. Morgan, András Báldi, Harriet Bartlett, Péter Batáry, Áron D. Bihaly, Amaël Borzée, Karel Chobot, Joette Crosier, Kristy Deiner, Adam J.M. Devenish, Arne Devriese, Anna Ermakova, Harith Farooq, Alexander Fedotov, Jonáš Gaigr, Róbert Gallé, Alexandre Gategeko, Huanzhi Gong, Ian Gordon, Felix Herzog, Andrew Jacobson, Vignesh Kamath, Upma Manral, Riho Marja, Caroline Martin, Delphine Mpayimana, Fiona Mutekanga, Piotr Naskrecki, Philbert Ndahayo, Donath Nkurikiyimana, Jean de Dieu Nsenganeza, Jean Pierre Ntibabarira, Joseph Poston, Chevonne Reynolds, Jean Aimé Ruticumugambi, Prahalad Srikanthan, Edina Török, Inam Yekwayo, Nick J.B. Isaac, Lynn V. Dicks   +59 more
wiley   +1 more source

Conservation status of New Zealand freshwater invertebrates, 2013 [PDF]

, 2014
The conservation status of 644 freshwater invertebrate taxa, across five Phyla, 28 Orders and 75 Families, was assessed using the New Zealand Threat Classification System (NZTCS) criteria.
Collier, Kevin J., Grainger, N., Harding, Jon S., Hitchmough, Rodney, Smith, Brian J., Sutherland, Darin Lee   +5 more
core   +1 more source

Emergence patterns of Coenagrion hastulatum (Charpentier) in northern Germany (Zygoptera: Coenagrionidae) [PDF]

, 1997
The emergence patterns were followed closely at a pond E of Braunschweig. The emergence period lasted 24 days and the EM50 was reached after 11 days. Due to its emergence phenology. C. hastulatum is classified as a summer species.
Befeld, S., Katzur, K., Lepkojus, S., Rolff, Jens   +3 more
core   +1 more source

Determinants of Terrestrial and Limnic Species Richness in Germany

Diversity and Distributions, Volume 32, Issue 3, March 2026.
ABSTRACT Aim Biodiversity is increasingly threatened by human impacts. While abiotic conditions are well known to shape species richness, the role of human activities remains less clear. We examined how abiotic and human factors influence terrestrial and limnic species richness in a densely populated region with a long land‐use history.
Julia S. Ellerbrok, Maria Sporbert, Vera Schreiner, Christian Ristok, Nina Farwig, Georg J. A. Hähn, Reinhard Klenke, Gunnar Seidler, Jori Maylin Marx, Anja Schmidt, Josef Settele, Christian Wirth, Christian Albert, Claus Bässler, Veronika Braunisch, Heiko Brunken, Klaus‐Jürgen Conze, David Eichenberg, Nico Eisenhauer, Götz Ellwanger, Joshua Ferenczy, Bettina Gerlach, Dagmar Haase, Alexander Harpke, Fabian Herder, Florian Jansen, Johannes Kamp, Jakob Katzenberger, Peter Keil, Elisabeth Kühn, André Mascarenhas, Jörg Müller, Martin Musche, Hong Hanh Nguyen, Peter Pogoda, Axel Ssymank, Frank Suhling, Heide‐Rose Vatterrott, Thilo Wellmann, Helge Bruelheide   +39 more
wiley   +1 more source

Sex‐Specific Control and Incomplete Matings: Sperm Removal Behavior in a Bush Cricket Species

Ethology, Volume 132, Issue 3, Page 194-203, March 2026.
In this study, we investigated which sex influences the duration of sperm removal behaviour (SRB) in the ornate bush cricket, Metaplastes ornatus. Female traits showed a weak effect on SRB duration, and lighter females mated more frequently. Frequent unsuccessful mating terminations shortened SRB indicating high level of sexual conflict.
Chiara Flaskamp, Klaus Reinhold, Tuba Rizvi   +2 more
wiley   +1 more source

An observation on the Odonata fauna of the Asansol-Durgapur Industrial Area, Burdwan, West Bengal, India

Journal of Threatened Taxa, 2016
The present investigation was undertaken as a pilot study to examine the diversity, occurrence and distribution pattern of dragonflies and damselflies (Odonata) from the selected study sites of the Asansol-Durgapur industrial area of Burdwan District of ...
Amar Kumar Nayak, Utpal Singha Roy
doaj   +1 more source

First Records for \u3ci\u3eAeshna Sitchensis\u3c/i\u3e (Odonata: Aeshnidae) and \u3ci\u3eEnallagma Clausum\u3c/i\u3e (Odonata: Coenagrionidae), and a Northwestern Record for the State-Endangered \u3ci\u3eSomatochlora Incurvata\u3c/i\u3e (Odonata: Corduliidae) in Wisconsin [PDF]

, 2018
While surveying for Odonata in coastal peatlands and associated shoreline areas adjacent to Lake Superior in Wisconsin, we documented populations of two new state record species, the zig-zag darner (Aeshna sitchensis Hagen) and the alkali bluet ...
DuBois, Robert B, Epstein, Eric J, Mead, Kurt, Pleski, Julie M, Smith, William A   +4 more
core   +2 more sources