Herring Fishery

It seems density dependent mechanisms between years often drives longer distance migrations by areas/timeframes when they occur. But geographical & temporal trends can be masked by the static manner in which spawn, catch and tag-recapture data from DFO assessment regions have been grouped. Newer mtDNA and/or otolith chemistry work (often completed by independent researchers) is helping tease apart those area migrations in more recent years; while there has been some tagging work done by DFO previous to the availability of detailed DNA analyses. Jaclyn Cleary is the main contact for these data within DFO.

www.tandfonline.com

Use of Microsatellites to Determine Population Structure and Migration of Pacific Herring in British Columbia and Adjacent Regions

This study assessed genetic population structure of Pacific herring Clupea pallasii in British Columbia and adjacent regions by analyzing microsatellite variation; the utility of microsatellites f...
www.tandfonline.com

Information archivée dans le Web | Information Archived on the Web

publications.gc.ca publications.gc.ca

Differences in numbers and types of predators by area is the other process that often drives mortality and area-specific stock trends. That area of research is another area that is getting some work done in the past couple years or so. The WCVI area has had more done in this area of research than other DFO areas.

Quick answer: every year and historic time series is different wrt these variables.
 
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MRWood said:
I'd assume that cutbacks would lead to more herring returning from spawning in the SOG and migrating back out through juan de fuca to the west coast.
Click to expand...

and yet despite the 50% cut in harvest last year, the biomass still dropped. Meaning the 20% harvest was not a fundamental driver of abundance.
 
wildmanyeah said:
and yet despite the 50% cut in harvest last year, the biomass still dropped. Meaning the 20% harvest was not a fundamental driver of abundance.
Click to expand...
Obviously if there are 7-8,000 extra tonnes of herring left in the water it's going to help the biomass by that amount. I'd also assume it's like compound interest as the years go on.
We are seeing more and more humpbacks in the SOG which I assume would eat a lot of herring. Along with the huge population of sea lions.
 
gone fishin said:
The smaller the percentage of Herring harvested for roe means more herring in many locations.
I think the article I posted answers your question.
https://hakaimagazine.com/news/how-do-herring-learn-to-migrate-go-to-schools/
Click to expand...

I think the answer is no then. There is no connection with the herring up in SOG and the Victoria Waterfront. Different populations entirely. That's why I never understood where you guys down there are coming from.

The Gorge waterway has zero to do with SOG stocks.
 
MRWood said:
Obviously if there are 7-8,000 extra tonnes of herring left in the water it's going to help the biomass by that amount. I'd also assume it's like compound interest as the years go on.
We are seeing more and more humpbacks in the SOG which I assume would eat a lot of herring. Along with the huge population of sea lions.
Click to expand...

There are areas of our coast that have not been fished for decades and not seen a compounding recovery. Survival between age classes varies greatly year to year.

The 20% was not of the whole biomass as well. it was of the spawning biomass in a particular area, Many areas of the SOG had spawns that were not even part of the counts.

This is another one of those things that rec fishermen have been oversold on.
 
MRWood said:
Obviously if there are 7-8,000 extra tonnes of herring left in the water it's going to help the biomass by that amount. I'd also assume it's like compound interest as the years go on.
We are seeing more and more humpbacks in the SOG which I assume would eat a lot of herring. Along with the huge population of sea lions.
Click to expand...
Bingo! AND grey whales and seals and hake - at least on the WCVI side.
 
wildmanyeah said:
There are areas of our coast that have not been fished for decades and not seen a compounding recovery. Survival between age classes varies greatly year to year.

The 20% was not of the whole biomass as well. it was of the spawning biomass in a particular area, Many areas of the SOG had spawns that were not even part of the counts.

This is another one of those things that rec fishermen have been oversold on.
Click to expand...
Re areas that haven't been fished for decades.....can you imagine where they would be if they had been taking 20% of the biomass each year from those areas. That's what you would call reverse compounding :cool:
 
One thing that can change the assessment--- herring schools can move FAST ! They are constantly on the move before they hit the spawning beaches.
 
MRWood said:
No, openerrrr up, less herring is good for salmon, lol.
Click to expand...

are you saying there was not enough herring for salmon under the past/current harvest regime? and if so how does pumping the straight full of hatchery salmon (mainly for a recreational fishing harvest) make sense then? if they have to compete with wild salmon for food.

don't be surprised when more things get shut down when your pushing the , there is not enough herring, wild salmon are plummeting, whales are starving,salmon are starving faster than ever ENGO BS

you guys are yours own worst enemy
 
wildmanyeah said:
are you saying there was not enough herring for salmon under the past/current harvest regime? and if so how does pumping the straight full of hatchery salmon (mainly for a recreational fishing harvest) make sense then? if they have to compete with wild salmon for food.

don't be surprised when more things get shut down when your pushing the , there is not enough herring, wild salmon are plummeting, whales are starving,salmon are starving faster than ever ENGO BS

you guys are yours own worst enemy
Click to expand...
Yup
 
"you guys are yours own worst enemy"
It don’t agree with the argument of those who say we should let the herring harvest go unchecked because if we recognize there are not enough herring to feed our salmon and other marine species that depend on them, that it will influence the hatchery output of salmon and enhance the possibility of further salmon fishing restrictions.
I say lets get our Herring stocks coast wide return to historic higher end levels.
It can only help preserve our wild and hatchery salmon fishing opportunities.
 
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