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Full-Text Articles in Marine Biology
Autoradiographic Localization Of Exogenously Supplied Amino Acids After Uptake By The Polychaete, Glycera Dibranchiata Ehlers, Paul Chien, Michael Rice
Autoradiographic Localization Of Exogenously Supplied Amino Acids After Uptake By The Polychaete, Glycera Dibranchiata Ehlers, Paul Chien, Michael Rice
Michael A Rice
Localization of amino acid transport sites within the integument of Glycera dibranchiata Ehlers was carried out by freeze-section and freeze-dry histological techniques. The worms were exposed for one hour to the non-metabolizable amino acid analog c(14)-cycloleucine in seawater. Freeze-sectioning and freeze drying of tissue samples allows the localization of water soluble compounds by autoradiography. Amino acid uptake is largely across the parapodial gill surfaces and the epidermis. The gills become rapidly labelled with c(14)-cycloleucine to a greater extent than the epidermal cell layers. Coelomocytes within the gills become radiolabeled in one hour. It is suggested that the rapid labelling of …
Investigations Of The Potential Effects Of Underwater Noise From Petroleum Industry Activities On Feeding Humpback Whale Behavior, Charles Malme, Paul Miles, Peter Tyack, Christopher Clark, James Bird
Investigations Of The Potential Effects Of Underwater Noise From Petroleum Industry Activities On Feeding Humpback Whale Behavior, Charles Malme, Paul Miles, Peter Tyack, Christopher Clark, James Bird
James E Bird
This report presents the results of an investigation of the potential effects of underwater noise from petroleum industry activities on the behavior of feeding humpback whales (Megaptera novaeangliae). The objective of the study was to determine the nature and degree of any observed behavioral response to controlled sound exposure levels from industrial noise sources. The noise sources used were a single 100 cu. in. air gun and playback of sounds from selected petroleum industry activities. The playback sounds were obtained from tape recordings of drillship, drilling platform, production platform, semi-submersible drilling rig, and helicopter overflight noise. The work was performed …