A new species of the sanguinea-group Quatrefages, 1866 (Annelida: Eunicidae: Marphysa) from the Philippines
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2019-09-24Author
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Abstract
A new species of the Marphysa sanguinea group, M. iloiloensis n. sp. (Annelida: Eunicida: Eunicidae), is described from the Marine Annelids Hatchery of the Southeast Asian Fisheries Development Center, Aquaculture Department (SEAFDEC- AQD), Iloilo Province, Philippines. It represents the first record of this group in the Philippines. The new species is most similar morphologically to M. hongkongensa Wang, Zhang & Qiu, 2018, but can be distinguished from it by having fewer branchial filaments, a pair of faint eyes (absent in M. hongkongensa), and in slight differences in jaw morphology and chaetation. The embryos of the new species develop inside a jelly cocoon attached to the entrance of the adult burrow; this is the first time that egg-containing cocoons have been found in any species of the sanguinea-group. Phylogenetic analysis based on the mitochondrial gene cytochrome c oxidase subunit I (COI) revealed that Marphysa iloiloensis n. sp. is genetically distinct from all other analysed Marphysa species and forms a sister group to M. hongkongensa. A revised identification key to members of the sanguinea-group in Southeast Asia is provided.
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Glasby, C. J., Mandario, M. A., Burghardt, I., Kupriyanova, E., Gunton, L. M., & Hutchings, P. A. (2019). A new species of the sanguinea-group Quatrefages, 1866 (Annelida: Eunicidae: Marphysa) from the Philippines. Zootaxa , 4674(2), 264-282. https://doi.org/10.11646/zootaxa.4674.2.7
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1175-5326; 1175-5334Collections
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Effects of feeding rate and sediment depth on the survival, growth performance, and biomass of mud polychaete Marphysa iloiloensis from early juvenile to adult in grow-out tanks
Mandario, Mary Anne
; ; (Elsevier, 2022-02-15)
Polychaete aquaculture has progressed in some countries to meet the high demand of fish bait and aquaculture industries. However, knowledge on the aquaculture requirements of polychaetes in the grow-out is still scarce. The present study aimed to determine the optimal feeding rate (FR) and sediment depth (SD) for the grow-out culture of mud polychaete Marphysa iloiloensis from early juvenile to adult stage. The effects of two FRs (50 and 100 g m−2) with three different levels of SD (2, 3, and 5 cm) on M. iloiloensis survival, growth performance, and biomass were evaluated. The study was performed in a 2 × 3 factorial experiment using completely randomized design with four replicates per treatment that lasted 120 days. Early juveniles (30 days old) were stocked in glass tanks at 1000 individuals m−2 and grown for 120 days (herein refer as 'adult', with musculature and capable of reproduction). Regardless of FR, M. iloiloensis had the highest survival of 45 ± 2% in 5 cm SD but statistically comparable to 3 cm SD (34 ± 5%), while survival was significantly lowest in 7 cm SD (26 ± 3%). The levels of nitrite (NO2) and total ammonia nitrogen (TAN) was significantly higher in the rearing water of 100 g m−2 FR than in 50 g m−2 FR. Higher FR resulted to poor water quality and appeared to contribute to the low M. iloiloensis survival in 100 g m−2 FR. Growth performance was similar among treatments. There was a significant interaction between FR and SD on M. iloiloensis biomass (p < 0.05). In 50 g m−2 FR, no difference was observed in the different levels of SD while in 100 g m−2 FR, biomass was significantly higher in 5 cm SD than in 7 cm SD (p < 0.05). M. iloiloensis biomass in 50 g m−2 FR was higher compared to 100 g m−2 FR, regardless of the SD. Overall, the culture of M. iloiloensis using 50 g m−2 FR in 3–5 cm SD showed the best survival and biomass. Based on these findings, it is recommended that the grow-out culture of M. iloiloensis from early juvenile to adult should follow the 50 g m−2 FR and should be done in tanks with 3–5 cm SD to improve production. -
Inclusion of live mud polychaete (Marphysa iloiloensis) in the feeding regime improved the hatchery performance of domesticated Indian white shrimp (Penaeus indicus)
Estante-Superio, Erish; Mandario, Mary Anne ; Santander-Avancena, Sheryll ; ; Estepa, Fe Dolores ; Mamauag, Roger Edward (Elsevier, 2023-03-07)
A 60-day feeding trial was conducted to evaluate the effect of inclusion frequency of hatchery-bred mud polychaete, Marphysa iloiloensis, as part of a combination diet on the reproductive performance and larval quality of domesticated P. indicus. The two treatments were fed with a combination of formulated diet, mussel, squid, and mud polychaete with once (T1) and twice (T2) a week inclusion in the feeding regime. In contrast, the control group was fed only a diet combination of mussels, squid, and formulated diet. There was no significant difference in the mean survival of male and female broodstock in all treatments upon termination (\(p\gt0.05)\). Shrimp in T1 and T2 performed significantly better than the control in terms of spawning frequency (\(p=0.037)\) and fertilization rate (\(p=0.001)\), while T1 had significantly high re-maturation (\(p=0.038)\). The survival, spawning, hatching rate, egg, and nauplii production did not differ significantly among treatments (\(p\gt0.05)\). Also, no difference in the gonado-somatic index (GSI), hepato-somatic index (HSI), spermatophore weight, and sperm count was found among diet treatments (\(p\gt0.05)\). Post larvae from T1 and T2 performed significantly better than the control after 25 (\(p=0.008)\) and 30 (\(p=0.009)\) minutes of abrupt exposure to freshwater, respectively. Therefore, even once weekly, mud polychaete inclusion is sufficient to improve the reproductive performance of P. indicus broodstock and produce offspring with boosted resistance in the hatchery. -
A process of culturing mud polychaete Marphysa iloiloensis
(Intellectual Property Office of the Philippines, 2021-09-20)The present invention is a culture process for the larval rearing of mud polychaete Marphysa iloiloensis (from 1 DAH to 30 DAH). The process involves the use of fresh bioflocs as the first food source and settlement substrate of the polychaete larvae. Larval rearing was located in a shady area (0 to 50 lux) and aerated, UV-treated seawater was recirculated in the larval rearing tanks. Using this invention, 83.29 ± 3.79% of the larvae survived with 21± 1 segments after 30 days of larval rearing.
