Genetic study of sockeye salmon in B.C. river suggests 75% decline since 1913
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OldBlackDog
Well-Known Member
The researchers also developed a theory for why some populations have declined more sharply than others.
"What we found was those populations with historically the largest body size have declined the most, which suggests that fisheries selectivity is the most probable driver," Price said.
He said there are likely other contributing factors, but selective gill-netting for larger fish appears to be the best explanation.
"What we found was those populations with historically the largest body size have declined the most, which suggests that fisheries selectivity is the most probable driver," Price said.
He said there are likely other contributing factors, but selective gill-netting for larger fish appears to be the best explanation.
OldBlackDog
Well-Known Member
Taken from Bobs article on the Skeena.
On August 11 DFO rescinded the FN FSC gill net closure on the strength of its latest estimates of sockeye run strength increasing to 601,082. Remember, according to the IFMP and the pre-season agreement between FNs and DFO, that would be the point at which FSC fisheries for sockeye commenced, not the point where it was the same old, same old business as usual. Someone needs to explain how the estimate of 601K on August 11 stacks up against DFO’s test fishery estimate of August 17 that indicated 600,175 sockeye into the Skeena. Little known is the fact that all through the latter half of June and July, when the conservation crisis for sockeye (and chinook) was abundantly clear, there was substantial FSC fishing for any and all salmon in both the Skeena approaches and the Skeena, Bulkley and Babine rivers at least. The FSC fishing in the Skeena approaches involves the same vessels that would be out in the same areas at the same time if there had been a commercial fishery. This practice is/was not exclusive to 2019
On August 11 DFO rescinded the FN FSC gill net closure on the strength of its latest estimates of sockeye run strength increasing to 601,082. Remember, according to the IFMP and the pre-season agreement between FNs and DFO, that would be the point at which FSC fisheries for sockeye commenced, not the point where it was the same old, same old business as usual. Someone needs to explain how the estimate of 601K on August 11 stacks up against DFO’s test fishery estimate of August 17 that indicated 600,175 sockeye into the Skeena. Little known is the fact that all through the latter half of June and July, when the conservation crisis for sockeye (and chinook) was abundantly clear, there was substantial FSC fishing for any and all salmon in both the Skeena approaches and the Skeena, Bulkley and Babine rivers at least. The FSC fishing in the Skeena approaches involves the same vessels that would be out in the same areas at the same time if there had been a commercial fishery. This practice is/was not exclusive to 2019
Genomic data show how fish fare in evolutionary rapids
http://news.cornell.edu/stories/2019/08/genomic-data-show-how-fish-fare-evolutionary-rapids
http://news.cornell.edu/stories/2019/08/genomic-data-show-how-fish-fare-evolutionary-rapids
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