But scientists can only observe these delicate larvacean
houses from a submersible or via a remotely operated camera--they are too fragile to survive collection in nets.
houses: a unique food source in the pelagic environment.
The number of OL (by-catch) comprising largely of the larvacean
; Oikopleura spp., the chaetognatha; Parasagitta (Sagittidae) spp., crab larvae and fish larvae are presented in Table 2.
house: A unique food source in the pelagic environment.
Brachyury (T) expression in embryos of a larvacean
urochordate, Oikopleura dioica, and the ancestral role of T.
Shimmering pink light glowed in the waters of Saanich Inlet on Vancouver Island, British Columbia, in July 1968, thanks to the "bloom" of a little-known but common marine animal Oikopleura dioica, a species of larvacean
. By midsummer, Oikopleura numbers in Saanich Inlet had reached the millions, turning the sea a luminescent rose.
Predator-prey interactions between the larvacean
Oikopleura dioica and bacterio-plankton in enclosed water columns.
For instance, smaller size chum salmon strongly avoided larvacean
prey, whereas larger chum (>75 mm) showed roughly neutral or positive selectivity.
and the larvacean
Fritillaria borealis (Lohmann 1896) represented 60-80% of the zooplankton by number, based on samples from bongo nets.
B Sample Area (n) amphipod Chiniak Bay 4 t Ugak Bay 1 t Kiliuda Bay 2 t Shelf 4 t Zooplankton (number of individuals/ [m.sup.3]) (1) crab Area chaetognath copepod larvae euphausiid Chiniak Bay 9 332 1 23 Ugak Bay 13 12 48 2 Kiliuda Bay 13 40 82 28 Shelf 1 51 1 4 Zooplankton (number of individuals/ [m.sup.3]) (1) fish shrimp Area larva larvacean
mysid larvae Chiniak Bay t 4 2 4 Ugak Bay t 3 1 t Kiliuda Bay t 17 4 3 Shelf t 15 t 2 total no./ Area [m.sup.3] Chiniak Bay 375 Ugak Bay 80 Kiliuda Bay 188 Shelf 74 (1) 0<t<0.05.
abundance and percentage abundance in either season, and the abundance and percentage abundance of cyphonautes in autumn, did not differ between depths.
Overall, the estuary midstream and upstream supported the highest densities of protozoans, rotifers, and most meroplanktonic larvae, whereas the estuary downstream supported the highest densities of copepods, cladocerans, ostracods, molluscs, chaetognths, and larvaceans