. Contributions to Canadian biology and fisheries. Fisheries; Marine biology. 19 On July 4 (1 ), the deep tow at station 82 contained ssveral young fish lar\ae, together with 88 per cent, of Acartia tonsa and 12 per cent, of Etirytemora hirundoides. In addition there were present in indi\idual numbers 98 Er^asiliis chautauquaensis, 8 Laophonte huntsmani n. sp., 109 Bosmina longirostris \ar. cornuta, one Argidus and fi\e "C'ypris" larvae of Balanus. Ergasilus chanlauquacnsis was originally found swimming freeK', adults of both sexes, at Lake (^hautauqua, , in 1886. The fresh-w
. Contributions to Canadian biology and fisheries. Fisheries; Marine biology. 19 On July 4 (1 ), the deep tow at station 82 contained ssveral young fish lar\ae, together with 88 per cent, of Acartia tonsa and 12 per cent, of Etirytemora hirundoides. In addition there were present in indi\idual numbers 98 Er^asiliis chautauquaensis, 8 Laophonte huntsmani n. sp., 109 Bosmina longirostris \ar. cornuta, one Argidus and fi\e "C'ypris" larvae of Balanus. Ergasilus chanlauquacnsis was originally found swimming freeK', adults of both sexes, at Lake (^hautauqua, , in 1886. The fresh-water fish upon whose gills the female would be a facultative parasite has not been discovered. In the Miramichi material I have seen only males which are distinguished from the females by the possession of a \ery large pair of blunt, claw-like posterior maxillipedes. Like Bosmina, they probably drifted down with the current into the lower reaches of the river-system without reproducing there. When seen from the ventral aspect, after preservation, they exhibit flecks of blue pigmenta- tion (Fig. 16). On August 9 (10 ) the surface tow at station 82 with the finest plankton net (No. 20) amounted to 26 cc, comprising abundant phytoplankton and nearh'. Fig. Ergasilus chautauquaensis Fel- lows. Male from above and forebody from belon . .Miraniichi ri\-er. 100 per cent, of Acartia tonsa, all females. In addition there were Ner\- few Eurytemora hirundoides, numerous Calanoid and Balanid nauplii, 28 crab lar\ae, 46 Laophonte huntsmani, 160 Ergasilus, two Evadne and no Polydora lar\ae. At the same time in the deep tow at 7 metres with the medium net (Xo. 5) the total quantity of plankton was 30 cc. This consisted largely of Copepods with some Mysids. The percentage count gave the following results: Acartia tonsa (female) 58 per cent. Acartia tonsa (male) 22 " Eurytemora hirundoides 8 " Temora longicornis o " " Pseiidodiaptomus coronatus 4 " Tortanus disc
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectfisheri, bookyear1901
