Canada jay

For Canada jays, sibling rivalry can be deadly as winner takes all

Retrieved on: 
Monday, May 15, 2023

Sometimes death can occur as a result of this competition, but siblicide almost always occurs when young are still in the nest.

Key Points: 
  • Sometimes death can occur as a result of this competition, but siblicide almost always occurs when young are still in the nest.
  • In many species, despite sibling conflicts, juveniles have the choice to stay within the home territory or leave and seek out a new home.
  • This study on sibling conflict in wild animals is the first to measure the cost of kicking out siblings.

Canada jay behaviour

    • To do this, we examined the survival and lifetime reproductive success of all known dominant juveniles and ejectees.
    • Because Canada jays can live up to 17 years, it took over five decades to collect lifetime data on a sufficient number of individuals in the population.
    • Canada jays are full-time residents of North Americas’s boreal forests, and they rely on stored food items to survive through the winter.

Winner takes all

    • And while the dominant juvenile reaps those benefits, ejectees are sentenced to a risky first year of life, where they are less likely to survive.
    • It is not necessarily a beneficial thing to kill or expel a sibling, even if the ability is there.
    • Siblings share genes, so harming a sibling has a negative effect on the genetic success of an individual’s lineage.

Sibling behaviour and survival

    • This trend is due to warming temperatures and higher frequencies of freeze-thaw events that spoil the highly perishable food that jays store for winter.
    • Our study is important for the field of behavioural ecology, and it provides novel insights into the evolutionary drivers of sibling conflicts.

McEwen Mining: Q2 2022 Results

Retrieved on: 
Thursday, August 11, 2022

TORONTO, Aug. 11, 2022 (GLOBE NEWSWIRE) -- McEwen Mining Inc. (NYSE: MUX) (TSX: MUX) today reported its second quarter (Q2) results for the period ended June 30th, 2022.

Key Points: 
  • TORONTO, Aug. 11, 2022 (GLOBE NEWSWIRE) -- McEwen Mining Inc. (NYSE: MUX) (TSX: MUX) today reported its second quarter (Q2) results for the period ended June 30th, 2022.
  • Our 100%-owned mines generated a cash gross profit(2) of $7.7 million in Q2 and a gross profit of $4.2 million.
  • Dr. Quick made important contributions to the boards of McEwen Mining and Minera Andes during his 14 years with the companies.
  • Table 1 below provides production and cost results for Q2 & H1 2022 with comparative results for Q2 & H1 2021 and our guidance range for 2022.

McEwen Mining: Q1 2022 Results

Retrieved on: 
Tuesday, May 10, 2022

TORONTO, May 10, 2022 (GLOBE NEWSWIRE) -- McEwen Mining Inc. (NYSE: MUX) (TSX: MUX) today reported its first quarter (Q1) results for the period ended March 31st, 2022.

Key Points: 
  • TORONTO, May 10, 2022 (GLOBE NEWSWIRE) -- McEwen Mining Inc. (NYSE: MUX) (TSX: MUX) today reported its first quarter (Q1) results for the period ended March 31st, 2022.
  • Cash, cash equivalents and restricted cash at March 31, 2022 was $70.4 million, of which $35.6 million is attributable to McEwen Copper.
  • Fox produced 7,700 GEOs in Q1 at total cash costs and AISC of $1,193 and $1,729 per GEO sold, respectively.
  • Table 1 below provides production and cost results for Q1 2022 with comparative results for Q1 2021 and our guidance range for 2022.