The average abundance of chaetognaths
over the entire study period was 823 ind 1000 [m.
Phakelodus is treated as an ancestor of chaetognaths
(Szaniawski 1982, 2002).
Table 1 Comparison of the characteristics of the bioluminescent organs of two deep-sea chaetognaths
, Caecosagitta macrocephala and Eukrohnia fowleri Characteristic C.
Although adult chaetognaths
move throughout the water column, juveniles form swarms at very specific depths, close to the level where the swarms of small copepods they prey on are most abundant.
Small copepods are also prey items to larger zooplanktivores like chaetognaths
, ctenophores and medusae, in addition to being cannibalized by larger copepods as well (Turner, 2004).
Other important prey included amphipods, chaetognaths
, crabs, and pollock (Fig.
They are reported as an important food-link and as common prey for chaetognaths
and fish larvae (Feigenbaum and Maris 1984).
The macrozooplankton includes dense swarms of chaetognaths
and of Euphausia crystallorophias over the platform and of E.
The "others" in this case were mostly bivalves, whereas the "others" for the co-occurring juvenile chum salmon were mostly chaetognaths
(Goto and Yoshida, 1981), cephalopods (Moltschaniwskyj and Doherty, 1995), turtles (Salmon and Witherington, 1995), corals (Yamashiro and Nishihira, 1995), and algae (Clifton and Clifton, 1999), to name just a few.
For the holoplanktonic community, the main groups were copepods (80%) and chaetognaths
Radiolarians, cnidarians, annelids, crustaceans & chaetognaths
from the plankton in the Gulf of California.
, hyperiid amphipods, other), which were counted and weighed.
(Sagitta elegans) and sand lance (Ammodytes hexapterus) were collected at night from the FHL floating breakwater near a submerged light.
Abstract: The zooplankton community structure, including copepods, euphausiids, chaetognaths
, and decapod larvae, was monitored during six circadian cycles using Bongo net (500 [micro]m mesh net) samples from Bahia Magdalena, on the southwest coast of Baja California, Mexico.