Okay, I ran a search through Gofishbc.com through the archives for Deer lake in Burnaby and did not find any stocking info
A simple google search with the right key words gets you into into a bunch of studies & reports by the government, biologists, UBC, etc that are hosted on
http://a100.gov.bc.ca/. Clicking links straight from google search opens the PDF reports directly.
Fisheries and Oceans Canada
Science Branch, Pacific Region
Pacific Biological Station
A Review of Yellow Perch (Perca Flavascens),
Smallmouth Bass (Micropterus Dolomieu),
Largemouth Bass (Micropterus Salmoides),
Pumpkinseed (Lepomis Gibbosus), Walleye
(Sander Vitreus) and Northern Pike (Esox
Lucius) Distributions in British Columbia
http://www.dfo-mpo.gc.ca/Library/337851.pdf"There are no provincial records contain no accounts of
authorized largemouth bass stocking in the Lower Mainland."
Ok, so the lack of records indicates that the province wasn't responsible for bass introduction.
"Dymond (1936) refers to stocking of smallmouth bass in various BC
waterbodies by the federal Department of Fisheries in 1901, but notes that other
species, including pumpkinseed, may have accompanied these fish.Wait.. What does that sound like to you? To me, it sounds like the federal department of fisheries initially stocked
other invasive species in addition to smallmouth in various water bodies in BC a 100+ years ago. They admit that they may have stocked pumpkinseed as well. Them not being sure what fish they're introducing sounds a little irresponsible on their part. Or maybe I am not understanding the wording correctly? Perhaps all the individuals who illegally distributed members of the sunfish family simply thought they were continuing the job (and mistake) of the federal department of fisheries started in 1901, as a vast majority of reported newly established bass populations happened within the next few decades (which means the actual illegal stocking happened shortly after 1901, as it takes a while for a lake to become noticeably populated with bass.
Interesting, this is such a "detailed" recent report dating to 2009..... (by detailed I mean they say things such as: fish is distributed along 4.1km of lake X. Wow, 4.1? why not 4.2km? Sounds like it's extremely detailed!) However Deer Lake isn't even on list of studied locations! It's not mentioned in there at all! It Deer Lake, a WHOLE LAKE has been left out of the paper, I wonder what else has? In my experience, 1 in 100 things gets reported, 1 in 10 reported things gets confirmed, and 1 in 2 confirmed things doesn't get "lost" in the archives.
So if the federal department of fisheries admits to stocking multiple invasive species, and the recent report fails to include a study regarding Deer Lake, in my opinion, this gives an inconclusive result due to a lack of concrete information. I would agree with you that no matter what happened initially, most likely the bass was also illegally stocked in the years to come.
Some other interesting articles:
B. C. GAME COMMISSION
- SCIENTIFIC REPORT - RED SIDE SHINERS
1950
http://a100.gov.bc.ca/appsdata/acat/documents/r9082/Lindsey1950_1283460179350_d57cc03a3afc475d9e3f541346c8516ac27c1d2b35913641422b76cd790d888d.pdf"The harmful effects are felt by all sizes of trout, while the beneficial
effects apply only to adult trout. "
The glorification of Bass fishing on TV shows has many people thinking..
I agree with you on that glorification goes a long way into getting people overthinking the good, and the bad, about this species. After the initial growth boom, like you mentioned, the system goes back into balance and the fish remain small. Small, weaker, reproduce less.. The lower mainland isn't full of monster bass that are gobbling up every insect. There are barely any locations with only 3-4" bass, which don't require as much food. Pumpkinseeds are another story..
There are quite a few anglers on the local forums that mention they have fished bass in brunette river and other locations 20,30,40 years ago. I'm just putting it out there..
I've never caught small mouth in the lower mainland. I also believed black crappie was a myth - people mistook it for the pumpkinseed, as the only sun fish I caught, by the dozen - was pumpkinseed.. Until a black crappie hit my fly in Pitt Meadows in 2015. There used to be a huge population of catfish in 2012 in Pitt meadows. Not anymore! At least, I can't find them or get them to bite. They aren't growing big. I wonder how many people knew about the catfish in Deer Lake? My first and last sighting was a 4"-5" catfish caught in the shallows by a crow, and dropped on the main beach about 11 years ago. What I'm trying to say is that the lack of abundance and catchability of invasive species, aside from few isolated locations, like Deer Lake, leads me to believe that the invasive species aren't doing too well here after all.
Pumpkinseed are well known to eat eggs of other fish. Redside shiners also eat salmonoid fry and survive well in trout waters, unlike bass. Pumpkin seeds were introduced in several large european river systems and they halved the number of native species as they ate all of their eggs, within just 5 years, have colonized everything, even the "mud puddles on the side of the road". Thankfully we do not observe that here, at least not yet. The conditions in the local water systems aren't looking ideal for those kinds of warm water fish. Although spread is possible and does occur, naturally and illegally, it's more localized to "dirty" sloughs at golf courses, silt & mud beds; areas that aren't popular salmonoids anyway. I doubt the carp, catfish & bass will take over the harrison, fraser or vedder river and wreck havoc on the salmonoids. The spawning channels on Stave river are about 250ft away from Silvermere lake, a popular bass fishing location, according to the web, and it seems to be doing just fine.
For example.. There is a local website with a nice long write up of the harm done to the Brunette river system. There are even groups of people doing a "neighborhood watch" sort of thing over the salmon streams in that area. I don't recall them mentioning that bass were devastating to the salmonoids in that system. I do however recall them blaming every toxic run off from the industrial developments that was killing off all of the fish there.
Bass have been in Deer & Burnaby lake for a good while. Yet salmon returns began increasing recently. If bass were as deadly as their reputation is, no amount of new fish ladders or stream restoration would have increased the salmon returns. Sure, the lack of bass may yield even higher salmon returns, but there's not much anyone can do about that.
Regarding my joke about northern pike.. a little clarification is probably needed. Burnaby lake, a weedy frog filled pond that already has minnows, bass, sunfish, carp, catfish, trout, salmon and the lingering ghost of that snakehead.. The only fish missing from this aquarium soup, would be a pike, right? ..I'm not suggesting someone throws a pike in there. However, regarding "usefulness".. there are field tests being done to put pumpkinseed populations in european naturally formed trout ponds under control by releasing big, sterile pike - as a last resort. The idea is that a large quantity of same sex sterile pikes quickly eat the food supply. The pikes were supposed to include gps trackers, which allows for monitoring, and the possibility of netting them out after several years so the river delta (an area at the base of the mountains, without natural pike habitat) can be stocked with trout yet again. This extreme solution is a solution being tested for that particular water body and its unique attributes and isn't necessarily applicable anywhere else in the world.
To summarize,
1) The federal department of fisheries began the initiative of stocking an invasive species.
2) The federal department of fisheries admits to the possibility of them stocking multiple members of the sunfish family like pumpkinseed, (and others: crappie, and largemouth).
2) Based on my observations, maybe it's not as disastrous of an issue in our waters as it's made out to be or has been in other places around the world.
3) Based on the local regulations, the fisheries department considers crappie/sunfish far worse than bass, as the limit for bass (large/smallmouth combined) in the lower mainland regulations is 4 per day. Interesting. You can also keep 4 trout. If invasive bass are so bad to the local systems, wouldn't it be wise to raise the limit to 20, like the crappie/sunfish limit, to encourage people to lessen their numbers for the sake of improving conditions for the salmonoids?
4) Historically, no matter the intent of the people responsible, introducing an extra species (invasive or not) into a fishery usually has a negative impact on the existing species.
4) "Alien invasive species have been described as the second most prevalent threat for Canadian freshwater fish species at risk next to habitat loss". So, as I mentioned in the previous post, habitat loss due to human development is a much bigger issue. Improving habitat conditions is a much more effective way to improve the native fishery.
I welcome new information to dispute my findings or conclusions, as the purpose of this is to make future improvements.