| Discocotyle sagittata | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Platyhelminthes |
| Class: | Monogenea |
| Order: | Mazocraeidea |
| Family: | Discocotylidae |
| Genus: | Discocotyle |
| Species: | D. sagittata |
| Binomial name | |
| Discocotyle sagittata (Leuckart, 1842) | |
| Synonyms | |
| |
Discocotyle sagittata is a species of freshwater monogenean gill ectoparasites of Salmo and Oncorhynchus. Their lifestyle is characterised by a free-living larval stage that may be inhaled by a suitable freshwater fish host, after which they may attach upon expulsion over the gill onto a single gill filament. Upon reaching maturity, parasites can remain attached by a posterior opisthaptor with its 8 associated clamps (4 in 2 rows). Adults may reach a few millimetres in length. D. sagittata feeds on the blood of the gills via an anterior mouth part. Adults are hermaphrodite, and produce 3–14 eggs per day at 13 °C, a process which is temperature dependent.[1] Once produced, eggs drop to the riverbed surface and at 13 °C take 28 days to develop to hatching larval forms. Major parasite burden can result in damage to the host gill and anaemia from blood loss.
References
- ↑ Gannicott, AM; Tinsley, RC (2014-05-14). "Environmental effects on transmission of Discocotyle sagittata (Monogenea): egg production and development". Parasitology. 117 (5): 499–504. doi:10.1017/s0031182098003205. PMID 9836315.