Results 81 to 90 of about 12,185 (250)

Raman Signature of the Wings of the Globe Skimmer Dragonfly: Pantala flavescens

Journal of Raman Spectroscopy, EarlyView.
Raman spectroscopy is used to confirm the presence of aliphatic and aromatic hydrocarbons and related derivatives including aldehydes, halides, alcohols, acids, esters, and phenols on the wings of Pantala flavescens. The analysis indicates that wing‐surface lipid composition is largely consistent across the three main ecological zones in Ghana. Notably,
Rachel Desulme, Eva Gates, Myah Massiah, Malek Stafford, Lou Bellinghausen, Lillian Blanchard, Henry Adamson, Evajoice Otoo, Thomas D. Dovie, Abdul A. R. M. Rashid, Ebenezer Boakye, Calvin A. Asiedu, Princess W. Coffie, Hilda Armonle, Abigail Mensah, Kofi W. Adu, Jessica L. Ware, Lara D. LaDage, Rofela Combey, Ekaterina S. Kiseeva   +19 more
wiley   +1 more source

Population dynamics of Townsend's big‐eared bats: effect of age and drought on survival

The Journal of Wildlife Management, EarlyView.
We estimated age‐specific yearly survival of female Townsend's big‐eared bats in Inyo and Mono Counties, California. We found that both juvenile and adult survival were negatively impacted by drought, and that detection probability was lower for hand‐recapture than for bats detected via pass‐through antenna arrays.
Natalie M. Hamilton, Rebekah E. Ruzicka, Jessica E. Light, Michael L. Morrison   +3 more
wiley   +1 more source

Behavioural lateralization in Budgerigars varies with the task and the individual. [PDF]

PLoS ONE, 2013
Handedness/footedness and side biases are a well-known phenomenon in many animals, including humans. However, these so-called biases have mostly been studied at the population level--individual biases have received less attention, especially with regard ...
Ingo Schiffner, Mandyam V Srinivasan
doaj   +1 more source

Neo‐Taphonomic Analysis of Prey Bone Remains Accumulated by Golden Eagle (Aquila chrysaetos): A Case of Nests in Southern France

International Journal of Osteoarchaeology, EarlyView.
ABSTRACT The golden eagle (Aquila chrysaetos) nests in rock cavities where it accumulates prey bone remains during the breeding season. Because nests can be reoccupied from year to year, these faunal elements can form remarkable bone accumulations and, in the sub‐fossil record, be mixed with assemblages derived from human or other predator activities ...
Juliette Ripond, Véronique Laroulandie, Jean‐Baptiste Mallye, Renaud Nadal, Patrick Bayle, Christian Itty   +5 more
wiley   +1 more source

Impact of Glucose Addition on The Embryo Development of Climbing Perch (Anabas testudineus Bloch)

Grouper
The addition of glucose to the hatching medium is thought to enhance the embryonic development of climbing perch by providing additional energy, strengthening metabolic stability.
Akhmad Fauzi, Slamat Slamat, Rukmini Rukmini   +2 more
doaj   +1 more source

A Dynamics and Stability Framework for Avian Jumping Take-off

, 2018
Jumping take-off in birds is an explosive behaviour with the goal of providing a rapid transition from ground to airborne locomotion. An effective jump is predicated on the need to maintain dynamic stability through the acceleration phase.
Crowther, William, Parslew, Ben, Sivalingam, Girupakaran   +2 more
core   +1 more source

A hybrid algorithm for Bayesian network structure learning with application to multi-label learning [PDF]

, 2014
We present a novel hybrid algorithm for Bayesian network structure learning, called H2PC. It first reconstructs the skeleton of a Bayesian network and then performs a Bayesian-scoring greedy hill-climbing search to orient the edges.
Aussem, Alex, Elghazel, Haytham, Gasse, Maxime   +2 more
core   +6 more sources

Multiple scales of fear: foraging behaviour of white‐naped jays in semiarid landscapes

Oikos, EarlyView.
Animals must constantly balance the need to find resources with the risk of predation. Not only avoiding direct encounters with predators but also assessing the overall risk of their environment using cues, social information or habitat traits at multiple spatial and temporal scales.
Maria Carolina Beiriz, Luiz A. M. Mestre, Lorenzo R. S. Zanette   +2 more
wiley   +1 more source

Matching habitat choice could be brightness‐based instead of hue‐based in green‐brown polymorphic grasshoppers

Oikos, EarlyView.
Some prey species have evolved background matching, that is they resemble their surrounding environment in terms of colour and/or brightness. When prey populations inhabit patchy environments, they may even have evolved specialised phenotypes: each phenotype matching a specific subset of patches.
Lilian Cabon, Holger Schielzeth
wiley   +1 more source

Monitoring active osprey nests with drones is more time efficient and less disturbing than conventional methods

Wildlife Biology, EarlyView.
Drones are used to monitor bird nesting sites at less accessible locations, such as on cliffs, human infrastructure, or within the tree canopy. While there are a growing number of studies documenting avian behavioral responses to various drones, there is a continued need to monitor taxa‐specific responses to different drone models. We explored both the
Natasha K. Murphy, Jared A. Elmore, Melanie R. Boudreau, Brian S. Dorr, Scott A. Rush   +4 more
wiley   +1 more source