The giant freshwater prawn, Macrobrachiumrosenbergii, is a large shrimp extensively used in aquaculture whose grooming behaviors were analyzed in this study. Macrobrachiumrosenbergii exhibits three unique male morphotypes that differ in their behavior, morphology and physiology: small-clawed males (SM), orange-clawed males (OC) and blue-clawed males (BC). The largest and most dominant males, BC...

Sniffing is one-way animals collect chemical signals, and many males self-groom when they encounter the odor of opposite-sex conspecifics. We tested the hypothesis that sexual chemical signals from females can induce self-grooming behavior in male root voles (Microtus oeconomus Pallas). Specifically, we investigated the sniffing pattern of male root voles in response to odors from the head, tru...

anxiety symptoms have been reported to be present in many patients with diabetes mellitus. however, little is known about the effects of hyperglycemia in critical periods of the central nervous system development. we assessed locomotive, exploratory, and anxiety behaviors in adult rats that remained from infantile repeated hyperglycemia by the open field and elevated plus maze tests. our findin...

Politeness, as a universal phenomenon in society, is a reflection of specific cultural values, which can be observed in all languages and cultures. This thesis attempts to make a comparative study of politeness behavior between English and Chinese on the contrastive analyses on such linguistic behaviors as addressing, greeting, complimenting. Owing to different beliefs and values, and different...

Males and females can differ both in the social behaviors they perform and in the contexts in which they engage in these behaviors. One possible mechanism of sex differences in behavior is a sexual dimorphism in the relay of sensory information to motor areas, but no studies have examined the role of such a relay in vertebrate sexually dimorphic behaviors. We used egr-1 expression as a marker o...

This study examined relations between risk perception/self-efficacy and handwashing intentions/behaviors during the A (H1N1) pandemic influenza. Data were collected from a longitudinal sample of Costa Ricans (NT1/T2 = 449/97). Results revealed that males and females presented a different social cognitive pattern in reaction to A (H1N1) pandemic. In females, the effects of risk perception/self-e...

abstract competition is a phenomenon that influences the size, structure and stability of insect communities, particularly on solitary endoparasitoids species. although, competition normally incurs costs, it might be adaptive for the surviving individual. to determine which factors affect the patch use strategy of foragers under competition, the effect of previous experience with hosts already-...

As in many mammalian and avian species, testicular androgens or their metabolites activate courtship and copulatory behaviors in adult male zebra finches. However, studies of sexual differentiation of these behaviors and related anatomical structures provide conflicting results. For example, posthatching estradiol can both masculinize courtship and the neural structures involved in song in fema...