. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. RESPIRATORY ADAPTATIONS IN A MYSID 115 Patlt of respiratory water flow The resipratory currents of (/'. niyens were traced by placing water containing dyes at different points around the carapace of living animals and observing the path taken by the dye. Most of the respiratory water entered between the left and right sets of legs into the ventral gills (Fig. 3) ; it passed laterally through the ventral gills and into the lateral gills. The water then passed dorsally through the lateral gills, flowed anteriorly above them, a
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. RESPIRATORY ADAPTATIONS IN A MYSID 115 Patlt of respiratory water flow The resipratory currents of (/'. niyens were traced by placing water containing dyes at different points around the carapace of living animals and observing the path taken by the dye. Most of the respiratory water entered between the left and right sets of legs into the ventral gills (Fig. 3) ; it passed laterally through the ventral gills and into the lateral gills. The water then passed dorsally through the lateral gills, flowed anteriorly above them, and then turned downward and passed out through the exhalant openings. No water entered under the posterior dorsal edge of the carapace. A little may enter at the base of the thoracic exopodites. The structures responsible for this water flow are the two pairs of scaphognathites. The anterior scaphognathite on each side is the exopodite of the second maxilla; the posterior one is an epipodite on the first thoracic limb. 100. .0 VENTILATION VOLUME (I/kg, wet ) 100 FIGURE 5. Relation between percent utilization and ventilation volume in Gnathophausia in- gens; D G. -ingens—mean points taken from Figure 21, •— —• G. ingens—envelope enclosing all values found, - - Procambarus siniulans, from Larimer and Gold (1961) -• — • — . Carcinus maenas, from Arudpragassom and Naylor (1964), Q— —Q Homarus indgaris, from Thomas (1954). The illustrations of the gills diagrammatically simplify their very complexly branched and foliaceous structure (Fig. 3 ). The gill surface area is certainly extremely large; but, because of the great irregularity of the smaller gill divisions, it was not possible to make a satisfactory quantitative estimate of the gill surface area. Mechanics of oxygen uptake Ventilation volume, per cent utilization, and oxygen consumption were measured in a series of 8 runs using 6 different individuals between 6 an
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
