a Department of Economics, Central Michigan University, Mount Pleasant, MI 48859, USA b William R. Kenan, Jr. Professor of Economics and Sociology, McNeil 160, 3718 Locust Walk, University of Pennsylvania, Philadelphia, PA 19104-6297, USA c Fredrick J. Warren Professor of Demography, McNeil 272, 3718 Locust Walk, University of Pennsylvania, Philadelphia, PA 19104-6297, USA d School of Economics...

Monk Parakeets are considered one of the most invasive bird species given its unique capacity among psittacines to build their own communal nests. Originally introduced as pets in houses from where they escaped or were released, currently more than 20 countries worldwide. This is case Chile, during 1970s. Between 2016 and 2019 we searched Parakeets’ nests structures Santiago metropolis region. ...

The number, morphometric parameters and amount of aminergic neurosecretory product of protocerebral A2 neurosecretory neurons were investigated in the fifth instar of Lymantria dispar caterpillars, following a suitable or unsuitable trophic regime. Caterpillars originated from two populations (Quercus rubra or Robinia pseudoacacia forest) and were differently adapted to trophic stress, i.e. fee...

Behavioral plasticity is widespread in swarming animals, but little is known about its underlying neural and molecular mechanisms. Here, we report that a neuropeptide F (NPF)/nitric oxide (NO) pathway plays a critical role in the locomotor plasticity of swarming migratory locusts. The transcripts encoding two related neuropeptides, NPF1a and NPF2, show reduced levels during crowding, and the tr...

Locust bean gum is a versatile biopolymer which finds its application in various fields. The conventional use of Locust bean gum as an excipient in drug products generally depends on the thickening, gel forming and stabilizing properties. A need for prolonged and better control of drug administration has increased the demand for tailor made polymers. Various significant works have been carried ...

Calcium regulation of the insect actomyosin ATPase is associated with the thin filaments as in vertebrate muscles, and also with the myosin molecule as in mollusks. This dual regulation is demonstrated using combinations of locust thin filaments with rabbit myosin and locust myosin with rabbit actin; in each case the ATPase of the hybrid actomyosin is calcium dependent. The two regulatory syste...

Scott, Jon. The locust jump: an integrated laboratory investigation. Adv Physiol Educ 288: 21–26, 2005; doi:10.1152/advan.00037.2004.— The locust is well known for its ability to jump large distances to avoid predation. This class sets out a series of investigations into the mechanisms underlying the jump enabling students to bring together information from biomechanics, muscle physiology, and ...

Locust swarms cause famine and hunger in parts of Sub-Saharan Africa as they travel across croplands and eat vegetation. Current models start with biological properties of locusts and analyze the macroscopic behavior of the system. These models exhibit the desired migratory behavior, but do so with too many parameters. To account for this, a new model, the Alignment and Intermittent Motion (AIM...

During outbreaks, locust swarms can contain millions of insects travelling thousands of kilometers while devastating vegetation and crops. Such large-scale spatial organization is preceded locally by a dramatic density-dependent phenotypic transition in multiple traits. Behaviourally, low-density 'solitarious' individuals avoid contact with one another; above a critical local density, they unde...