Satiation time and predatory behaviour of the dragonfly nymph Mesogomphus lineatus

Hydrobiologia ◽  
1976 ◽  
Vol 50 (1) ◽  
pp. 55-64 ◽  
Author(s):  
S. Mathavan
Keyword(s):  
Predatory Behaviour ◽  
Dragonfly Nymph ◽  
Satiation Time

Invertebrate prey and predatory behaviour of the omnivorous African tortoise Kinixys spekii

2001 ◽  
Vol 39 (1) ◽  
pp. 10-17 ◽  
Author(s):  
Adrian Hailey ◽  
Ian M. Coulson ◽  
Tarombera Mwabvu
Keyword(s):  
Predatory Behaviour ◽  
Invertebrate Prey

scholarly journals Prey Capturing Dynamics and Nanomechanically Graded Cutting Apparatus of Dragonfly Nymph

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 559
Author(s):  
Lakshminath Kundanati ◽  
Prashant Das ◽  
Nicola M. Pugno
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
High Speed ◽  
Prey Capture ◽  
High Speed Photography ◽  
Sensory Organs ◽  
Dragonfly Nymph ◽  
Drag Forces ◽  
Predatory Insects ◽  
Dragonfly Nymphs

Aquatic predatory insects, like the nymphs of a dragonfly, use rapid movements to catch their prey and it presents challenges in terms of movements due to drag forces. Dragonfly nymphs are known to be voracious predators with structures and movements that are yet to be fully understood. Thus, we examine two main mouthparts of the dragonfly nymph (Libellulidae: Insecta: Odonata) that are used in prey capturing and cutting the prey. To observe and analyze the preying mechanism under water, we used high-speed photography and, electron microscopy. The morphological details suggest that the prey-capturing labium is a complex grasping mechanism with additional sensory organs that serve some functionality. The time taken for the protraction and retraction of labium during prey capture was estimated to be 187 ± 54 ms, suggesting that these nymphs have a rapid prey mechanism. The Young’s modulus and hardness of the mandibles were estimated to be 9.1 ± 1.9 GPa and 0.85 ± 0.13 GPa, respectively. Such mechanical properties of the mandibles make them hard tools that can cut into the exoskeleton of the prey and also resistant to wear. Thus, studying such mechanisms with their sensory capabilities provides a unique opportunity to design and develop bioinspired underwater deployable mechanisms.

Offender-Centric Policing in Cases of Rape

2021 ◽  
pp. 002201832110274
Author(s):  
Philip NS Rumney ◽  
Duncan McPhee
Keyword(s):  
Decision Making ◽  
Domestic Violence ◽  
Police Officers ◽  
Sexual Offending ◽  
Confirmation Bias ◽  
Missed Opportunities ◽  
Predatory Behaviour ◽  
Investigative Tool ◽  
Care And Support ◽  
History Of

The article explores the idea of ‘offender-centric’ policing in cases of rape, with its focus on suspect and offender admissions and behaviours. It features discussion of 11 cases, illustrating offender-centric pathways to charge or conviction, the challenges facing complainants, suspects and police officers, along with missed opportunities to focus on a suspect’s behaviour. The importance of victim care and support is discussed, and it is argued that victim care should accompany an offender-centric approach to rape investigation. It is also argued that there are potential dangers with offender-centric tactics, specifically, that without due care it may become a self-confirming investigative tool influenced by confirmation bias which may lead to flawed decision-making. The article concludes by arguing that offender-centric policing has benefits in those cases with suspects who engage in predatory behaviour, have a history of previously undisclosed sexual offending and domestic violence and other problematic behaviours. It also has value in focusing the attention of investigators on what steps were taken by a suspect to ascertain the complainant’s consent. While the offender-centric approach cannot address all investigative challenges in rape cases, it is a useful addition to existing strategies.

scholarly journals Correction to: Transmission of a novel predatory behaviour is not restricted to kin

2021 ◽  
Author(s):  
Laura X. L. Tan ◽  
Wouter F. D. van Dongen ◽  
Craig D. H. Sherman ◽  
Kasun B. Ekanayake ◽  
Peter Dann ◽  
...  
Keyword(s):  
Predatory Behaviour

PredCheck: Detecting Predatory Behaviour in Scholarly World

2020 ◽  
Author(s):  
Manas Satish Bedmutha ◽  
Kaushal Modi ◽  
Kevin Patel ◽  
Naman Jain ◽  
Mayank Singh
Keyword(s):  
Predatory Behaviour

scholarly journals Bite club: comparative bite force in big biting mammals and the prediction of predatory behaviour in fossil taxa

2005 ◽  
Vol 272 (1563) ◽  
pp. 619-625 ◽  
Author(s):  
Stephen Wroe ◽  
Colin McHenry ◽  
Jeffrey Thomason
Keyword(s):  
Bite Force ◽  
Predatory Behaviour

Conchyliocarida, a class of fossil crustaceans: relationships to Malacostraca and postulated behaviour

1985 ◽  
Vol 76 (2-3) ◽  
pp. 381-389 ◽  
Author(s):  
Sylvie Secretan
Keyword(s):  
Whole Body ◽  
Compound Eyes ◽  
Predatory Behaviour

ABSTRACTConchyliocarida, from the Jurassic of France, have a conch-like carapace enclosing the whole body. The number of their somites, identified by the visible appendages, excludes them from Malacostraca. Caridean-like characters, including the large lamellar gills, bring them nearer to Malacostraca, end exclude them from other Classes. Their large functional compound eyes and the morphology of their limbs suggest a benthic life and predatory behaviour.Conchyliocarida are represented by several forms at La Voulte sur Rhône, which are compared and contrasted to related forms elsewhere.

Polar bear predatory behaviour reveals seascape distribution of ringed seal lairs

2013 ◽  
Vol 56 (1) ◽  
pp. 129-138 ◽  
Author(s):  
Nicholas W. Pilfold ◽  
Andrew E. Derocher ◽  
Ian Stirling ◽  
Evan Richardson
Keyword(s):  
Polar Bear ◽  
Ringed Seal ◽  
Predatory Behaviour
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