Ian Duggan
@icdugg.bsky.social
#Freshwater #Invasion biologist, #zooplankton ecologist, and sometime environmental historian. Ngāi Tahu. Keyboards at Bitter Defeat and tweet for @gardhistnz.bsky.social
Separated at birth. Ruud Kleinpaste's 'Scratching for a Living' and Witi Ihimaera's 'The Matriarch'.
October 26, 2025 at 1:03 AM
Separated at birth. Ruud Kleinpaste's 'Scratching for a Living' and Witi Ihimaera's 'The Matriarch'.
New paper! "Hypolimnetic Nutrient Subsidies to Surface Waters of a Large Lake: A Coupled Hydrodynamic Modelling and Nitrogen Isotope Field"; Upwelling of hypolimnetic water is important for lake littoral food webs, including for our freshwater mussel, kākahi (Echyridella menziesii) in Lake Taupō.
August 29, 2025 at 9:18 PM
New paper! "Hypolimnetic Nutrient Subsidies to Surface Waters of a Large Lake: A Coupled Hydrodynamic Modelling and Nitrogen Isotope Field"; Upwelling of hypolimnetic water is important for lake littoral food webs, including for our freshwater mussel, kākahi (Echyridella menziesii) in Lake Taupō.
As the temperatures start to cool, we are finally getting a few monarch caterpillars making it to a decent age, safe from the wasps.
March 30, 2025 at 8:09 PM
As the temperatures start to cool, we are finally getting a few monarch caterpillars making it to a decent age, safe from the wasps.
Teaching zooplankton on the Tauranga campus today. These are some nice trophi ("teeth") eroded from the predatory rotifer Asplanchna priodonta.
March 7, 2025 at 3:19 AM
Teaching zooplankton on the Tauranga campus today. These are some nice trophi ("teeth") eroded from the predatory rotifer Asplanchna priodonta.
Interesting colours on this bit of detritus in my sample tonight, amongst the Ceratium and pine pollen. Probably a small fragment of plastic off something.
February 13, 2025 at 9:21 AM
Interesting colours on this bit of detritus in my sample tonight, amongst the Ceratium and pine pollen. Probably a small fragment of plastic off something.
Before the age of instant gratification we had to request reprints of articles by mail, which took weeks to arrive. This is one I kept, from Robert G Wetzel, who authored at least 20 books & >400 articles, including "Limnology: lake and river ecosystems", which was one of my undergraduate texts.
January 30, 2025 at 7:15 AM
Before the age of instant gratification we had to request reprints of articles by mail, which took weeks to arrive. This is one I kept, from Robert G Wetzel, who authored at least 20 books & >400 articles, including "Limnology: lake and river ecosystems", which was one of my undergraduate texts.