The purpose of this study was to investigate the roles of branchial and gas bladder reflex pathways in the control of gill ventilation and air-breathing in the bowfin Amia calva. We have previously determined that bowfin use two distinct air-breathing mechanisms to ventilate the gas bladder: type I air breaths are characterized by exhalation followed by inhalation, are stimulated by aquatic or ...

Desalination is a promising sustainable solution to meet growing water needs of cities across the United States. However, the environmental impacts of the resulting filtrate (brine) discharged to surface water need to be evaluated before large-scale desalination can be successful in the United States. Developing fish are especially sensitive to changes in salinity and varying ionic composition....

Within reflex circuits, specific anatomical projections allow central neurons to relay sensations to effectors that generate movements. A major challenge is to relate anatomical features of central neural populations, such as asymmetric connectivity, to the computations the populations perform. To address this problem, we mapped the anatomy, modeled the function, and discovered a new behavioral...

Abstract We describe a new, tiny species of Schindleria from reef lagoon in the Red Sea off coast Hurghada, Egypt. edentata , new species, belongs to short dorsal-fin type with dorsal and anal fins about equal length. is characterized by an elongated but relatively deep body (body depth at anal-fin origin 10.8% SL 4 th ray 10.9 % SL); fin originating just slightly anterior (predorsal-fin length...

Tactile stimulation (light stroking) of a body wall flap attached to the ventral nerve cord of the medicinal leech evokes episodes of swimming activity. This swimming response undergoes habituation, involving changes in swim initiation and swim maintenance. Repeated stimulation of the body wall flap evoked swimming activity between three and 39 times before this response failed. During repetiti...

introduction: the formalin test is the most accepted chemical test for evaluation of nociception. it requires the injection of an adequate amount of formalin into the surface of the hindpaw. formalin test consists of phase 1 (0-7 min) and phase 2 (15-60) in which the animal shows painful behaviors. these phases are separated with a quiet phase named interphase, in which the nociceptive response...