. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. BIGELOW: COASTAL WATER EXPLORATION. 141 passing seaward from the 100 meter contour, there being very few at any level over the Slope (Station 10368, 500-0 meters, none, Station 10384, Station 500-0 meters, few, Station 10393, 250-0 meters and 500-0 meters none). Our data on the absohite abundance of Calanus in these waters is confined to quantitative hauls at two stations ofP New York, at one of which (10363), the horizontal haul yielded few, at the other (10365) 2^ quarts at 50-0 meters. And the catches of the quanti
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. BIGELOW: COASTAL WATER EXPLORATION. 141 passing seaward from the 100 meter contour, there being very few at any level over the Slope (Station 10368, 500-0 meters, none, Station 10384, Station 500-0 meters, few, Station 10393, 250-0 meters and 500-0 meters none). Our data on the absohite abundance of Calanus in these waters is confined to quantitative hauls at two stations ofP New York, at one of which (10363), the horizontal haul yielded few, at the other (10365) 2^ quarts at 50-0 meters. And the catches of the quantitative nets. Fig. 46.— Profile off New York (Stations 10362-10370) showing the relative abun- dance of large Calanus, August, 1916. Hatched (1), rich, 1 liter or more taken; dotted (2), less than 1 liter; and blank, occasional or none. differ correspondingly, the total volume of plankton being about 35 cc, of large Calanus 9,500 per square meter of sea surface at the former; "100 cc, with 27,000 large Calanus at the latter. Assuming that practically the whole catch of Calanus was made below 10 meters depth at these stations, an assumption justified by the fact that very few were taken on the surface, the number per cubic meter of water was at least 430 at Station 10363, 540 at Station 10365. And proba- bly the actual density of the Calanus population at the latter was locally many times greater than this, the richness of the horizontal net catch at 50 meters, just noted, suggesting a localization at and near that level. In estimating the abundance and bathymetric occurrence of Calanus finmarchicus over the rest of what I may call the Calanus zone, we must rely on the results of the quantitative hauls, which must be used wath caution, first, because they fish both on the way down and on the way up, as well as at the level at which the major part of the haul is made; second, because the latter can not be known exactly, for even. Please note that these images are extracted
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