Nth NSW sharks. Can they p!ss off already?

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Beanpole
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Re: Nth NSW sharks. Can they p!ss off already?

Post by Beanpole » Sat Dec 15, 2018 2:23 pm

No need to get passively aggressive with me, The Mull.

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offshore1
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Re: Nth NSW sharks. Can they p!ss off already?

Post by offshore1 » Sat Dec 15, 2018 2:40 pm

Beanpole wrote:
Sat Dec 15, 2018 2:23 pm
No need to get passively aggressive with me, The Mull.
MM was a marginal presence on here till you decided to have a crack.

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BA
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Re: Nth NSW sharks. Can they p!ss off already?

Post by BA » Sat Dec 15, 2018 4:51 pm

My purpose in life is to be a marginal presence on here. And in life in general.

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Re: Nth NSW sharks. Can they p!ss off already?

Post by buddy » Sat Dec 15, 2018 6:03 pm

BA wrote:
Sat Dec 15, 2018 4:51 pm
My purpose in life is to be a marginal presence on here. And in life in general.
Is that what you say to your wife in the bedroom?

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Re: Nth NSW sharks. Can they p!ss off already?

Post by Beanpole » Sat Dec 15, 2018 11:00 pm

BA wrote:
Sat Dec 15, 2018 4:51 pm
My purpose in life is to be a marginal presence on here. And in life in general.
As long as you don't do it aggressively, BA.

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Re: Nth NSW sharks. Can they p!ss off already?

Post by Nick Carroll » Sun Dec 16, 2018 8:02 am

Cranked wrote:
Fri Dec 14, 2018 9:28 am
Phew!

Stop worrying everyone, the number of great whites has fallen by 90% in the last 50 years despite them and their major food sources being protected for a the majority of that time.

Media clickbait?
Well the study doesn’t say that. It says that the number of great whites caught in the Queensland shark control program has fallen by 92%, from .7 sharks per net per year to .05 sharks per net per year.

This is super specific information. It doesn’t include any data from WA, SA, Vic, nor from NSW — where the average yearly catch of white sharks in the netting program has sat around 6 for many years now, but where in just a couple of years of “smart” drumline tagging in select locations, over 200 white sharks have been tagged and released.

What’s a bet the numbers of tag and release in NSW waters begin to decline pretty soon. Not because the sharks are vanishing, but because they’re no longer taking the bait.

It’s still a v interesting report, https://www.nature.com/articles/s42003-018-0233-1

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Re: Nth NSW sharks. Can they p!ss off already?

Post by tootr » Sun Dec 16, 2018 8:57 am

Pretty hard to get good statistics out of the smart drumlines data.
They have been in place for the two years of the study only at Evans and Ballina.
They were only in place at Forster/Coffs (81 tagged) for six months, similarly at the south coast locations.
What is does show is a seasonality to the numbers caught, roughly coinciding with the whale migration, but some still are around over summer.
What is also shows is they’re not rare.
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Cranked
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Re: Nth NSW sharks. Can they p!ss off already?

Post by Cranked » Sun Dec 16, 2018 9:14 am

Haha. I have only read the clickbait article somewhere with its extravagant claims by the researcher that shark numbers had collapsed, but it seemed to based only on an extrapolation of Qld shark control data. It was accompanied by a photo that showed a seething mass of sharks caught in a net implying that this was what the queensland shark control nets used to catch!

I thought the real conclusion should be the effectiveness of the shark control program in reducing shark activity in a localised area.
“I don’t necessarily agree with everything I say ”— Marshall McLuhan

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offshore1
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Re: Nth NSW sharks. Can they p!ss off already?

Post by offshore1 » Sun Dec 16, 2018 9:24 am

Croissy would excoriate that as MSM fake news, and rightly so.

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Cranked
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Re: Nth NSW sharks. Can they p!ss off already?

Post by Cranked » Sun Dec 16, 2018 9:29 am

Here's the Abstract of the report:

Decline of coastal apex shark populations over the past half century
George Roff, Christopher J. Brown, Mark A. Priest & Peter J. Mumby
Communications Biologyvolume 1, Article number: 223 (2018) | Download Citation

Abstract
Overexploitation of large apex marine predators is widespread in the world’s oceans, yet the timing and extent of declines are poorly understood. Here we reconstruct a unique fisheries-independent dataset from a shark control programme spanning 1760 km of the Australian coastline over the past 55 years. We report substantial declines (74–92%) of catch per unit effort of hammerhead (Sphyrnidae), whaler (Carcharhinidae), tiger shark (Galeocerdo cuvier) and white sharks (Carcharodon carcharias). Following onset of the program in the 1960s, catch rates in new installations in subsequent decades occurred at a substantially lower rate, indicating regional depletion of shark populations over the past half a century
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saltman
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Re: Nth NSW sharks. Can they p!ss off already?

Post by saltman » Sun Dec 16, 2018 7:45 pm

Click Bait
Shark Bait
We choose our poison
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Re: Nth NSW sharks. Can they p!ss off already?

Post by Beanpole » Fri Dec 28, 2018 2:30 pm

Just checking out Dorsail the shark tag site and the map showed Jews Point as being the first point north of Lennox heading up to Broken Head. Hadn't heard that one before.

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Re: Nth NSW sharks. Can they p!ss off already?

Post by foamy » Thu Jan 03, 2019 10:57 pm

As quoted on Swellnet, a spearfisher talking about dealing with sharks. Pretty good.

https://youtu.be/AtyEW2sB2to

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Cranked
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Re: Nth NSW sharks. Can they p!ss off already?

Post by Cranked » Fri Jan 04, 2019 3:00 am

Thanks foamy, thats the best analysis of shark behaviour. We're still fcuked though.
“I don’t necessarily agree with everything I say ”— Marshall McLuhan

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Re: Nth NSW sharks. Can they p!ss off already?

Post by foamy » Wed Mar 06, 2019 11:37 am

From swellnet, George Greenough on sharks reducing dolphin populations and endangering humans on the NSW Nth coast.

https://www.swellnet.com/news/swellnet- ... t-dolphins

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marauding mullet
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Re: Nth NSW sharks. Can they p!ss off already?

Post by marauding mullet » Wed Mar 06, 2019 2:55 pm

Read it and not sure exactly what he’s getting at but if it’s what I think then it doesn’t make sense to me.
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Cranked
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Re: Nth NSW sharks. Can they p!ss off already?

Post by Cranked » Wed Mar 06, 2019 3:37 pm

I think he's almost playing the morality card. Good idea.

Great whites are the unrepentant, non PC of the oceans. Not just anti social and next level racists (specists), they fcuking eat other species.

This sort of behaviour is completely unacceptable. Everyone, including great whites, should be vegan.

Hmmm. Is there the germ of an idea there?
“I don’t necessarily agree with everything I say ”— Marshall McLuhan

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Re: Nth NSW sharks. Can they p!ss off already?

Post by Nick Carroll » Wed Mar 06, 2019 5:59 pm

It's worse, white sharks eat dolphins! And whales! They must be Japanese.

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