Calocalanus pavo
Sewell (1914)
Download a fact sheet for Calocalanus pavo (PDF 293KB)
Taxonomy
| Phylum | Arthropoda |
| Subphylum | Crustacea |
| Class | Maxillopoda |
| Subclass | Copepoda |
| Order | Calanoida |
| Family | Paracalanidae |
| Genus | Calocalanus |
| Species | pavo |
Size
- Female: 0.88 – 1.20 mm
- Male: 1.04 mm
Distinguishing characteristics
- Male P5 asymmetrical, uniramous, 4-segmented on the right and 5 on the left
- Female urosome short, with broad bulbous genital somite when viewed from above
Male
- Body quite different from female
- May have plumose A1 and caudal rami
- Cephalosome and pedigerous somite 1 separate, pedigerous somites 4-5 fused
- Posterior prosome extending laterally square corners
- P5 uniramous and asymmetrical, limbs of unequal length, both legs end in 2 small subequal spines, right leg does not extend as far as distal border of second segment of left leg
- Urosome 5 segmented
- Caudal rami longer than wide, not divergent
Female
- A1 extends as far as caudal rami, terminal segments elongate, no transverse row of spinules on segments 1-7
- Rostral filaments long and slender
- Last pedigerous somite without spinules
- Posterior surface of exopod segment 2 on P2-4 without spines
Distribution
- Epipelagic and bathypelagic
- Inshore coastal, coastal and oceanic
- Australian distribution includes Great Barrier Reef, North West Cape and Tasmania
- Widespread in tropical, subtropical and temperate waters of all oceans
Ecology
- In the Mediterranean C. pavo found in warmer, less saline waters
- Herbivorous filter feeder
- Found mainly in the upper water column
- Broadcast spawner
- Reach maturity in eight days
- Favourite prey item for several families of tropical fish larvae
References
- Bradford-Grieve (1994)
- Boltovskoy (1999)
- Conway (2003)
- Fernández de Puelles et al (2009)
- Razouls et al 2010
- Taw (1975)