784 O I R (1982)29(12)

E. BIOLOGICAL OCEANOGRAPHY

El0. Apparatus and methods

82:6147 Baugh, T.M., 1982. Technique for photographing

small fish. Progve Fish-Cult., 44(2):99-101. 1020 Custer Ave.. Ogden, Utah 84404, USA.

82:6148 Benecke, Gisela, Wilhelm Falke and Christian

Schmidt, 1982. Use of algal fluorescence for an automated biological monitoring system. Bull. environ. Contamin. Toxicol., 28(4):385-395.

A reduction in the rate of photosynthesis as a result of pollutants causes a measurable levelling of the fluorescence curve of a suspension of some algae (Scenedesmus, Chlorella). An apparatus for the continuous monitoring of this curve is described, and the possible use of the system for stream-quality monitoring is demonstrated. Schmidt: Inst. fur Wasserforschung GmbH, Dortmund, Dortmunder Stadtwerke AG, 5840 Schwerte 6, FRG. (jch)

82:6149 Characklis, W.G., M.G. Trulear, J.D. Bryers and N.

Zelver, 1982. Dynamics of biofilm processes: methods. War. Res., 16(7):1207-1216.

Direct techniques involve measurement of biofilm thickness or mass. Indirect measurement includes: (1) methods for measuring specific constituents (e.g. polysaccharide) and (2) methods for determining microbial activity within the biofilm. The methods' use in both the laboratory and the field for continuous monitoring of biofilm processes is dis- cussed. Coll. of Engrg., Montana State Univ., Bozeman, Mont. 59717, USA.

82:6150 Chiaudani, G. and M. Vighi, 1982. Multistep

approach to identification of limiting nutrients in northern Adriatic eutrophied coastal waters. Wat. Res., 16(7):1161-1166.

Based on laboratory experiments, ammonium ion enhancement ratio and alkaline phosphatase were the most significant indicators of N and P defi- ciency, respectively, and were used for studies of coastal waters. Field results indicated that phyto- plankton populations were P-limited. N deficiency was never found during the study. Ist. di Ricerca sulle Acque, Rep. di Idrobiol., Applicata, Brugherio, Milano, Italy.

82:6151 Gage, J.D., 1982. An aerated sedimentation column

for subsampling large benthic samples from deep-sea sediments. Deep-Sea Res., 29(5A):627- 630.

An apparatus for subsampling benthic fauna col- lected by epibenthic sled is described. Samples are mixed by aeration and allowed to sediment into hoppers consisting of 8 equal segments. DMRL, Scottish Mar. Biol. Assoc., P.O. Box 3, Oban, Argyll, PA34 4AD, UK.

82:6152 Howe, N.R. and P.R. Hoyt, 1982. Mortality of

juvenile brown shrimp Penaeus aztecus associated with streamer tags. Trans. Am. Fish. Soc., 111(3):317-325. 1310 Sealy Ave., Galveston, Tex. 77550. USA.

82:6153 Johnson, S.B, and Y.G. Attramadal, 1982. A simple

protective cod-end fur recovering live specimens. J. expl mar. Biol. Ecol.. 61(2):169-173.

A protective cod-end mainly for use on sledges for the recovery of living animal specimens operates independently of surface signals. Mechanical dam- age of the specimens is avoided as well as exposure to bathymetric fluctuations of salinity, temperature and light during recovery. The device has been tested on benthic and hyperbenthic fauna at depths to 700 m. Dept. of Zool., Univ. of Lund, Helgonavagen 3, S-22362 Lund, Sweden.

82:6154 Lopez, G.R. and M.A. Crenshaw, 1982. Radiolabel-

ling of sedimentary organic matter with 14C- formaldehyde: preliminary evaluation of a new technique for use in deposit-feeding studies. Mar. Ecol.-Prog. Set., 8(3):283-289.

Organic matter can be labelled for ingestion exper- iments by chemically bonding ~4C-formaldehyde to it; microbes are reversibly inhibited with 30% NaC1, effectively preventing them from ~4C uptake. Mar. Sci. Res. Center, SUNY. Stony Brook, N.Y. 11794, USA.

82:6155 Morioka, Yasuhiro, 1981. A multilayer surface

zooplankton sampler. Bull. Japan Sea reg. Fish. Res. Lab., 32:65-71. Japan Sea Reg. Fish. Res. Lab., Suido-cho, Nigata 951, Japan.