J. E. G. Raymont

Studies on the fine structure of Copepoda: Observations on the fine structure of buttons on the setae of the maxilla and maxilliped of Centraugaptilus horridus (Farran)

Abstract Some of the setae on the second maxilla and maxilliped of the bathypelagic copepod Centraugaptilus horridus (Farran) carry two rows of small buttons which appear to be non-sensory cuticular structures. Details of the fine structure and the probable formation as well as the functions of the buttons are discussed.

The biochemical composition of certain oceanic zooplanktonic decapods

Abstract Analysis of 3 species of planktonic decapod, Acanthephyra, Gennadas and Sergestes from the Gulf of Aden suggested relatively high protein (∼60%); 2–3% carbohydrate; 12–29% lipid and 17–19% ash—all values % dry wt. Results are compared with earlier biochemical analyses of zooplankton.

Biochemical studies on marine zooplankton—IV. investigations on Meganyctiphanes norvegica (M. Sars)

Abstract The biochemical composition of deep frozen samples of the euphausid, Meganyctiphanes norvegica, collected over the 6-month period November–May, has been investigated. The mean values for the whole period showed substantial amounts of protein (57% dry weight) and of lipid (18% dry weight), but carbohydrate content was insignificant (2%). Chitin and ash amounted to 18%. Protein varied from a mean monthly minimum in February (50%) to a maximum in April (62%); lipid from a minimum in April (10%) to maximum in November (29%). The fluctuations suggest a reciprocal relationship between protein and lipid content. The very large fluctuations in total lipid suggested by some workers for certain zooplankton species have not been substantiated. Some preliminary data on the biochemical composition of Thysanoessa inermis are included.