Ayla J. Doubleday, Russell R. Hopcroft

Journal of Plankton Research, Volume 37, Issue 1, January/February 2015, Pages 134–150

Interannual patterns during spring and late summer of larvaceans and pteropods in the coastal Gulf of Alaska, and their relationship to pink salmon survival

“Across seasons, O. labradoriensis and F. borealis abundance were negatively related to temperature.” “O. dioica occurred in highest abundance during late summer relative to spring. During this time, O. dioica abundance was positively related to temperature and chlorophyll-a, but negatively related to salinity, and had a maximum abundance at nearshore stations.” “When season and year were pooled, the 150-µm net collected 34% of the abundance that the 53-µm net collected for Oikopleura spp., 34% of the abundance for Fritillaria spp. and 30% of the abundance for L. helicina. If we assume, time-of-day has no impact on the distribution of either group (i.e. no diel vertical migrations), then the 505-µm net captures 10% of the 53-µm net.” “The 505-µm mesh nets indicate that Oikopleura spp. had highest abundance at the surface”