DrWatson
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Posts posted by DrWatson
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9 hours ago, K4309 said:
I'm a bit surprised so many intelligent folk need to use 'peer reviewed scientific research' as a crutch for supporting decisions that have very little to do with sceince and everything to do with regulations, restrictions and economic prosperity for our country.
Science is not a crutch. The regulations are a result of the scientific evidence of the population decline. That science is peer reviewed. In this case the reports of Mackenzie and Clement have been reviewed by their peers, the Scientific Committee of the ICW.
"15.3.3.1 REVIEW OF ABUNDANCE ESTIMATESThe Committee agreed at last year’s meeting to review the abundance estimates for Hector’s dolphins intersessionally (IWC, 2016t, p.365). A formal process was established intersessionally following IWC procedures for such review including the creation of an Intersessional Expert Group (IEG) and an Intersessional Correspondence Group (ICG). The IEG consisted of independent experts who were asked to review the abundance estimates produced by Mackenzie and Clement (2014a; 2014b; 2016a; 2016b). The ICG was available in an advisory role for the IEG. The IEG report describes this in more detail and can be found in Annex M, appendix 2.
Palka presented a summary of the IEG report. The IEG reviewed the Mackenzie and Clement (2014a; 2014b; 2016a; 2016b) papers which estimated the abundance of Hector’s dolphins around the South Island, New Zealand (excluding sounds and harbours) to be 14,849 (CV:11%; 95% CI 11,923-18,492).
The IEG recognised that this study accounted for many difficulties that also affect other small cetacean abundance estimation studies using aerial surveys. It commended the ambitious and often innovative work undertaken by the authors to attempt to deal with all of those issues. After an in-depth review of the survey design, analyses and results, the IEG endorsed the abundance estimates and concluded that the estimates accurately reflected the data, were derived from appropriate data collection and analysis methods, and represented the most current abundance estimate for Hector’s dolphins around the South Island. Thus, they believed that it follows that it would be reasonable to use them to inform a management plan. The IEG also considered this study to be a step forward in the development of survey methodology more generally. Full details of the discussion within SM concerning the IEG report can be found in its respective section in Annex M." - From -J. CETACEAN RES. MANAGE. 18 (SUPPL.), 2017 "Report of the [IWC] Scientific Committee" from the ICW meeting from 7-19 June 2016.
Mackenzie, D. and Clement, D. 2014a. Abundance and distribution of ECSI Hector’s dolphin. New Zealand Aquatic Environment and Biodiversity Report No. 123 to the Ministry for Primary Industries: 79pp.
Mackenzie, D. and Clement, D. 2014b. Abundance and distribution of ECSI Hector’s dolphin - supplementary material. New Zealand Aquatic Environment and Biodiversity Report No. 123 to the Ministry for Primary Industries: 79pp.
Mackenzie, D. and Clement, D. 2016a. Abundance and distribution of WCSI Hector’s dolphin. New Zealand Aquatic Environment and Biodiversity Report No. 1168 to the Ministry for Primary Industries: 79pp.
Mackenzie, D. and Clement, D. 2016b. Abundance and distribution of WCSI Hector’s dolphin - supplementary material. New Zealand Aquatic Environment and Biodiversity Report No. 1168 to the Ministry for Primary Industries: 79pp.
Hamner, R.M., Constantine, R., Oremus, M., Stanley, M., Brown, P. and Baker, C.S. 2014a. Long-range movement by Hector’s dolphins provides potential genetic enhancement for critically endangered Māui’s dolphin. Mar. Mamm. Sci. 30(1): 139-53
Davies, N.M., Bian, R., Starr, P., Lallemand, P., Gilbert, D.A. and McKenzie, J. 2008. Risk analysis for Hector’s dolphin and Māui’s dolphin subpopulations to commercial set net fishing using a temporal-spatial age-structured model. Ministry of Fisheries, Wellington, New Zealand. [Available at: www.fish.govt.nz/en-nz/Consultations/Hector+new/default. htm].
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9 hours ago, K4309 said:
In modern times (the covid era) the scope of scientific studies is often wrong, or limited,
No
2 hours ago, aardvarkash10 said:and then the results of said study are taken wildly out of context,
Yes, and you also pretty much did exactly the same with this statement in general.
You took an idea (a subjective idea) presented it as a fact and made it general.
The greatest issue with scientific studies is that science is hard and it does take a lot of knowledge, and brain power to evaluate the work - that’s why we use peer review, and don’t simply allow Larry and Sindy from X - formerly known at Twatter - and their millions of stupid idolisers to determine what’s true and what’s not. Popularity is not peer review.
Additionally, many people are very fond of throwing the word “fact” around without understanding that science doesn’t generate facts, it assesses the evidence and explains the topic using the available evidence.
Common sense may or may not be aligned with truth and the evidence. It’s just common, popular, and can simply be a poor (mis)interpretation of the evidence that was never updated as more complete evidence was uncovered.
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On 12/01/2023 at 10:05 AM, Black Panther said:
They should do a mark foy like we used to for the crew rum race.
We need to make sailing fun again - fun for everyone who ever dreamed of being blown across a puddle in a walnut shell.
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22 hours ago, waikiore said:
Seven will finish, Romany you have it there -these races require much thought and planning -and are really only suited to ocean going yachts that are happy enough (not comfortable, but capable) for hour after hour with 25-30 on the nose.
Yeah I spent about 12h in the English Channel pushing into 25-30 on Firefly. Started out with some very good swells, prob 6m with quite ugly sea on top. Was pretty glad it moderated and died away around 8pm (as predicted) - not sure I wanted to spend a whole night doing the same.
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12 hours ago, K4309 said:
That is if said dolphin doesn't get scared off by the racket of these foils, and can't get out of the way of something that is moving just as fast as it's natural predator (while making a massive racket).
Huge assumptions here are that dolphins will know to stay away from the thing that’s making the huge racket, that said huge racket won’t confuse them, and that the visual identification of a big arse flying machine dragging it’s razor blade appendages in the water as an identifiable danger will be made by the dolphin. The approach speed may be the same but picking up an orca on your sonar or visually is going to be easier than picking up set of foils that have the frontal projection area of a toothpick.
The BOI issue is different because the dolphins are/were starving - not being run down by a fleet of 5knt crappers.Lastly, humans have been using the “I don’t think that preserving nature should disrupt economic activity” argument for quite a long time now and look how screwed we are.
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Coming into dock, crewman - big guy - on the rail with dock line in hand ready to step off and make fast.
He takes a big step as we’re prob just on a metre out. All good, he can make the gap, but his gammy knee buckles and down he goes between the dock and the boat with rapidly diminishing space.
I slam the boat into reverse to back out a bit.
Catastrophe averted but was damn scary.
And he surfaced with the dock line still in hand to complete the task… -
9 hours ago, Black Panther said:
Not sure such a thing exists. Best I can come up with is one person came up with the idea and it was adopted.
I found a report that was linked from the initial discussion piece whenever it was that it was notified. I’m not a marine biologist but the scientific rigour one would expect to be found to hang a policy like that on was massively lacking. The report was at best based on a level of science I would expect to find in a third rate primary school science fair. Mostly assumptions and negation of major untracked variables including a lack of evidence on food resource assessment and assumptions of human behaviour.
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9 hours ago, twisty said:
I think comparing non endangered Dolphins riding on the bow wave on a 6 knot S#$%box to Endangered Hectors dolphins swimming in a Protected Marine Reserve with boats with razor blades under them do 40 knots is pointless, and in Coutts' case somewhat disingenuous.
Agree completely. Wasn’t intending a comparison.
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At least the sun shone today while I holy stoned the deck
still blowing dogs off chains, tho
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Nice morning for it….
good angle, too
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1 minute ago, aardvarkash10 said:
The reality of any long weekend in Auckland. Glad to see it's global!
Yep!
mind you it took me 12h to get here from home. It’s like living in Auckland and keeping a boat in Welly! -
We just arrived in Brest. Got out of the taxi and it hailed, turned to rain after 10 min, and hasn’t stopped. That was 3h ago. Storm forecast for the next 2 days, lol…
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On 2/03/2024 at 1:07 AM, Jon said:
Got asked to go two up with Steve but couldn’t make it
looks like a top effort for a euro trash production boat
hahaha, appreciate the effort, Jon, but I'm too tired to bite
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I heard liquid luck weighs less than a 6 pack of Heineken.
anyone got some specs on that build? Length, beam, dips etc?
Pipi, single handed, came in a touch after liquid luck. Second mono over the line. Great effort for single handed!
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14 hours ago, Guest said:
Conversely When I get a new sail I feel like a kid with a new toy a cannot stop admiring it. Do I have a problem?
Nah, no idea what you’re talking about….
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13 hours ago, K4309 said:
It is just like fishing.
The most expensive way of catching free food.
Sailing is the most expensive way to go somewhere slowly…
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Just now, MartinRF said:
This is supposed to be a sailing forum and all you discuss is motors of various types...
/Martin
Well I worked out it costs me €1 per NM to sail and about 80c per mile to motor…
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19 hours ago, K4309 said:
Personally, I think worrying about how much diesel a sailing boat burns is a nonsense. Quoting Aa's example as a good example of relativity.
I'm constantly reading boat reviews in the magazines about launches, fizz boats what not. The amount of diesel or petrol those things burn is eye-watering. Just reading about the latest fishing boat, innovative design and what not, they recon it is fantastic fuel economy burning 2.65l per nautical mile. It is designed for day trips and has a 550l fuel tank. You can upgrade that to an 800l fuel tank!?!?!
If you are going electric drive purely for environmental benefit on a yacht, you need to be very careful the environmental cost of the batteries and associated ancillary's don't outweigh the amount of fuel you'd burn over the life of the boat.
Then there is outboards. I've got a little 2hp Yamaha. It's 2 stroke which is not great for the environment. I know people look at electric outboards for various reasons, one of which the impact on the environment. I use my outboard for dinghy fishing missions regularly and am putting a lot of hours on the outboard. But the thing is, 1l of two stroke oil has lasted about 2 years so far. Sure the 2 stroke motor puts oil into the sea, but the actual amount is very very minor. It doesn't take much new consumerism / consumption of new batteries, motors etc to offset any environmental benefits you'd get from ditching the 2 stroke. I know there are other benefits like power autonomy in remote pacific islands, or the stealth factor for fishing (reportedly makes a difference), but in the environmental element, I don't think the benefits are there.
Thing I’m most happy about with my electric motor is the removal of the petrol and the stinking outboard from my lazarete
I think I will buy the next engine size up when and if this one craps out tho. A bit more oompf would be good.
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I wired a gas detector into the fridge circuit, reasoning that if I’m onboard the fridge is on.
As soon as I get onboard I turn on the power/fridge so I can have a cold beer after hauling all the sails out of the way etc. The alarm screams bloody murder 5x as it does its start test - which always scares the bejesus outta me, then I remember wtf the noise is. Later I go out to the gas locker and connect the gas bottle to the gas line.
The detector sits in the bilge between the keel pump and the back of the fridge in the cabinetry that the saloon table is mounted on. I reasoned that any gas leak is more likely either at the stove, or at the bottle, and not along the copper line. Any leaking gas will flow downhill to that point where the detector is. I think it cost me about 120euro.
I also have a CO monitor/alarm mounted about waist height in the stb cabin entry - which should pick up any fumes leaking from the engine room, any CO leaking in from the diesel heater (this is the first outlet in the ducting) and anything from poor cooking combustion. This runs on a 12y non-replaceable lithium battery. When it’s done I’ll chuck it and buy a new one.
i mounted a nice expensive smoke detector up in the standing head space of the technical cabin. All switches and so forth and engine access are here. It had a 10y battery life. After 4 months it went off at 4am while we were gunkholing in a rather less than optimal place/weather. In about 2sec two mostly naked sailors and the crewman on watch were on deck with torches trying to figure out wtf was going on - all of us having mistaken it for a positional anchor alarm. There was no smoke, the thing had just fritzed out. Just have a cheap one now.
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I change ours out every 100h, Keeping the old as a spare (and also have a new spare available)
We only do about 70-80h a year.
Reminds me to do a preseason engine service in the next month or two.
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On 6/02/2024 at 9:09 PM, Black Panther said:
Wow. That thing is getting down to Pogo displacement - could go like a scalded cat if used well.
this would be my pick for coastal cruising - fast boats make great coastal cruisers because you can effectively increase your range while still keeping your job, lol. -
On 28/01/2024 at 5:32 PM, colin said:
How do we go about acquiring one of these yatchs
I suspect those ones have already gone. But there are plenty of others.
Most are really just junk. But they could be broken up into their parts and recycled carefully rather than being munched up. And buried as a homogenised mass.
Some might have a fair bit of copper or bronze fastenings in them - if you wanted to painstakingly extract each nail etc. ….
This Weekend's Achievements
in MarineTalk
Posted
Dropped the mooring lines at 15:12 and picked up a mooring buoy at 20.13, 39 miles later. Brest to Audierne, mostly 20-25 knts very deep so I played it careful and only when with the Code0, putting in an ugly first reef and changing down to the genoa about 5miles out from Raz de Sien - didn’t want to be caught awkwardly over ragged around there.
Saw 13.8 on the speedo at one point and also had SOG of over 15 for a while.
Should have reefed earlier (shouldn’t we all) and then would have had better balance to keep the code zero up for longer.