DiveFilm Episode40 – “Bubbling Reefs”

Posted on Feb 23, 07 at 8:05 pm. 
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These unusual bubbling reefs are located in Kattegat off the coast of Denmark. Methane seeps into the shallow waters in the northern Kattegat off the Danish coast to form spectacular submarine landscapes - the 'bubbling reefs' - due to carbonate-cemented sandstone structures which are colonized by brightly coloured animals and plants. Hans Christian Andersen has been working for some time to document these bubbling reefs, and offers us a fascinating glimpse in this special DiveFilm Podcast version of his documentary, "Bubbling Reefs." His website on the reefs, TheBubblingReefs.com, garnered the prize for the best website in the promotional category at the World Festival for Underwater Pictures at Antibes, France. To learn more about Hans and his work, please visit his website, Skawdiver.dk.

Is it a seal or a sea lion? This is how you tell them apart.

Posted on Feb 16, 07 at 8:00 pm. 
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Is it a seal or a sea lion? This is how you tell them apart.

Protein metabolism in marine animals: the underlying mechanism of growth.

Posted on Feb 15, 07 at 8:54 am. 
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Authors: Fraser KP, Rogers AD Growth is a fundamental process within all marine organisms. In soft tissues, growth is primarily achieved by the synthesis and retention of proteins as protein growth. The protein pool (all the protein within the organism) is highly dynamic, with proteins constantly entering the pool via protein synthesis or being removed from the pool via protein degradation. Any net change in the size of the protein pool, positive or negative, is termed protein growth. The three inter-related processes of protein synthesis, degradation and growth are together termed protein metabolism. Measurement of protein metabolism is vital in helping us understand how biotic and abiotic factors affect growth and growth efficiency in marine animals. Recently, the developing fields o...

The Northern Shrimp (Pandalus borealis) Offshore Fishery in the Northeast Atlantic.

Posted on Feb 15, 07 at 8:54 am. 
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Authors: Garcia EG This chapter describes the development and current situation of the offshore shrimp fisheries in Iceland, Greenland, Svalbard, Jan Mayen and the Norwegian Barents Sea area, with information on the biology of Pandalus borealis and its relation to the environment. Some additional information about the inshore shrimp fisheries of Iceland and Greenland of relevance to this study is also included. The Icelandic offshore shrimp fishery started in 1975 and has formed between 68% and 94% of the annual catch of shrimp since 1984. Landings peaked at 66,000 tons in 1997. The offshore fleet increased threefold from 1983 to 1987, and catch per unit of effort doubled. The first signs of overfishing were detected in 1987, when the first total allowable catch (TAC) was set, and catc...

The biology of glass sponges.

Posted on Feb 15, 07 at 8:54 am. 
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Authors: Leys SP, Mackie GO, Reiswig HM As the most ancient extant metazoans, glass sponges (Hexactinellida) have attracted recent attention in the areas of molecular evolution and the evolution of conduction systems but they are also interesting because of their unique histology: the greater part of their soft tissue consists of a single, multinucleate syncytium that ramifies throughout the sponge. This trabecular syncytium serves both for transport and as a pathway for propagation of action potentials that trigger flagellar arrests in the flagellated chambers. The present chapter is the first comprehensive modern account of this group and covers work going back to the earliest work dealing with taxonomy, gross morphology and histology as well as dealing with more recent studies. The ...

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