Recent content by blue hula3

In terms of number of fish per km2 and determining what level of exploitation is appropriate ... again, Kalk: - we've debated the numbers on the previous thread (I posted it somewhere around page 11 I think) - the issue isn't how many fish are taken, it is how many are taken relative to their...

Kalk, got a source for this one ? I started diving in the Philippines (Palawan) in 1982. Reefs there were in pretty good nick at the time.

Kalk, The truth is that food fishing is a problem. The truth is that aquarium collection in the Philippines is also a problem. In addition to the use of cyanide (any of which incremental use is a problem), there is the question of BIODIVERSITY impacts. Steve raised the point in passing but...

Kalk, The truth is that food fishing is a problem. The truth is that aquarium collection in the Philippines is also a problem. In addition to the use of cyanide (any of which incremental use is a problem), there is the question of BIODIVERSITY impacts. Steve raised the point in passing but...

Kalk/John The reason I didn't use the Fishbase diet info for P. leopardus is that it doesn't indicate what proportion of the diet each species comprises. One damsel in a gut and it will show up on the list. The list also does not indicate separate studies rather it indicates all the species any...

Kalk, Fishermen do not make the selection of gear based on the probability of collecting an animal that no longer exists. J

Kalk, Again, my point is not that a grouper won't eat what is put in front of it in a tank (or on a hook)... that's kind of like shooting goldfish in a barrel. The question is whether they eat reef fish also targeted by the marine aquarium collectors in the wild, particularly small reef fish...

But Mike, you were doing such a fab job that I was hesistant to disrupt the flow :wink: And frankly, I will admit to having been somewhat bewildered by the argument (claims?) at times. Almost too hard to bother teasing apart the misquoted numbers, chop and change logic etc. 'Sides...

Goldfish and guppies are feederfish for all sorts of pets that don't normally eat them. What your grouper eats in a fish tank is hardly relevant. Frankly, if someone has gone to the trouble of opening the guts of hundreds of groupers as part of a PhD and tells me "found mostly pelagics" ... I...

Well Hallelujah lordy lordy ... you've finally posted some data. Thank you for the interesting numbers. Certainly the groupers are at higher densities than we saw them in Bohol. The study also goes on to say that: "Groupers are generally higher in density ( that is number of individual per...

Kalk, Steve said "production at all costs" which is not the same as arguing that the "means of production controls the cost". What Steve was referring to is something Daniel Pauly of University of British Columbia refers to as "Malthusian overfishing" ... when fishers actually destroy the...

The means of production argument only works when the supply materials are not restricted ...or in this case ... the resource base isn't the limiting factor.

Three issues: (1) What fish do groupers eat ?- a major study of grouper gut contents (J. St. John, PhD thesis, James Cook University) showed that groupers primarily eat pelagic schooling fish NOT demersal fish and NOT damsels as Kalk has repeatedly inferred. Thus, it's apples and oranges to...

Honestly Kalk, where do you get this bull puckey from? How on earth do you reckon you have any sense of what goes through the mind of a Filipino fisherman? My guess ... and it is a guess despite having spent time in the region is that they are more concerned about catching enough fish to feed...