Rearing trials of Halla parthenopeia under laboratory conditions (Polychaeta: Oenonidae)

Osman, Inas H.; Gabr, Howaida R.; El-Etreby, Salah G.

doi:10.1016/j.jembe.2009.10.016

Cited by 7 publications

(10 citation statements)

References 29 publications

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“…Within the framework of a project aimed at developing new techniques for the aquaculture of Mediterranean polychaete species (Nesto et al 2012), we reared some H. parthenopeia specimens. Some worms extracted from the sediment and placed in clean tanks with sea water during routinely biometric measurements responded by producing a considerable quantity of transparent mucus similar to that reported by Osman et al (2010a). Furthermore, individuals most roughly transferred emitted a large amount of purple mucus.…”

Section: Introductionsupporting

confidence: 70%

Section: Introductionmentioning

confidence: 99%

“…Individuals of the oenonid species Halla parthenopeia and H. okudai can produce muci with different functions (Imabayashi et al 1996, Osman et al 2010a. The genus Halla includes some large polychaetes (up to 1 m long) living in soft bottoms of coastal temperate and sub-tropical marine habitats (Osman et al 2010a). In particular, H. parthenopeia and H. okudai occur, respectively, in the Mediterranean and the northern Red Sea (Osman et al 2010a, b), and in the western Pacific (Imabayashi et al 1996, Idris andArshad 2013).…”

Section: Introductionmentioning

confidence: 99%

“…These worms feed by wounding their prey and secreting abundant mucus with paralytic activity that forces the bivalve to open its valves. Then, the worm consumes the bivalve soft tissues by suction, after having digest them thanks to a digestive transparent mucus (Kawai et al 1999, Osman et al 2010a). Both species produce a third type of transparent mucus (structural) that facilitates locomotion and helps to stabilize and keep open their galleries (Kawai et al 1999, Osman et al 2010a).…”

Section: Introductionmentioning

confidence: 99%

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Toxicity of the purple mucus of the polychaete <em>Halla parthenopeia</em> (Oenonidae) revealed by a battery of ecotoxicological bioassays

et al. 2014

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Mucus secretions play a number of functions related to polychaete physiology and ecology. Under stress conditions, the polychaete Halla parthenopeia (Oenonidae) produces a purple mucus after mechanical stimulation, whose function is still unknown. Here, we assessed the toxicity of this purple mucus by means of both acute toxicity bioassays on the polychaete Dinophilus gyrociliatus and commercial ecotoxicological kits (Microtox ® , Rotoxkit ® and Artoxkit ® ). Palatability was also tested with the fish Oryzias melastigma. After emitting purple mucus, H. parthenopeia quickly moves away and starts releasing transparent mucus. Acute toxicity bioassays showed that the mucus was harmless (transparent), or lethal even when diluted about 1000 times (purple). Purple mucus was toxic at different concentrations, the LC 50 ranging from 0.7-0.3 g l -1 for D. gyrociliatus to 76 g l -1 for Artemia franciscana (Artoxkit ® ). Freeze-dried brine shrimp coated with transparent or purple muci were both consumed by O. melastigma. We hypothesized that the purple mucus is involved in the chemical defence of H. parthenopeia against competitors and parasites, and that its colour and toxicity are due to hallachrome, a 1,2-anthraquinone found in the skin of H. parthenopeia. La toxicidad del mucus púrpura del poliqueto Halla parthenopeia (Oenonidae) revelada por una batería de bioensayos ecotoxicológicosResumen: Las secreciones mucosas de los poliquetos desempeñan múltiples roles fisiológicos y ecológicos. El poliqueto Halla parthenopeia (Oenonidae) reacciona frente a una estimulación mecánica produciendo un mucus púrpura cuya función resulta, aun hoy en día, desconocida. El presente artículo evalúa la toxicidad de dicha secreción mediante bioensayos toxicológicos agudos (basado en el poliqueto Dinophilus gyrociliatus) y mediante kits ecotoxicológicos comerciales (Microtox ® , Rotoxkit ® and Artoxkit ® ). Asimismo, se analiza la palatabilidad mediante un test basado en el pez Oryzias melastigma. Tras secretar el mucus púrpura, H. parthenopeia se aleja rápidamente, al mismo tiempo que produce un mucus transparente. Los bioensayos toxicológicos agudos muestran que dichas secreciones son inocuas (transparente) o letal aun diluido unas 1000 veces (púrpura). El mucus púrpura puede ser tóxico a diferentes concentraciones y en función del test, oscilando su LC 50 entre 0.7-0.3 g l -1 (para D. gyrociliatus) y 76 g l -1 (para Artemia franciscana, Artoxkit ® ). Las Artemia liofilizadas fueron comidas por O. melastigma tanto si estaban revestidas de mucus transparente como púrpura. Nuestros resultados nos hacen pensar que el mucus púrpura de H. parthenopeia podría estar involucrado en un mecanismo de defensa química contra sus posibles competidores, pero también frente a posibles parásitos, y que, probablemente, tanto su color como su toxicidad tengan relación con la presencia del pigmento hallacromo, una 1,2-antraquinona, descubierto en la piel de esta especie de oenónido.Palabras clave: defensa química; mucus; efecto letal; Halla parthenopeia; inver...

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Section: Introductionsupporting

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Toxicity of the purple mucus of the polychaete <em>Halla parthenopeia</em> (Oenonidae) revealed by a battery of ecotoxicological bioassays

et al. 2014

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“…Halla okudai was described based on the following morphological differences from H. parthenopeia: (1) large-sized body; (2) subtriangular prostomium; (3) digiform nuchal antenna; and (4) the subacicular chaeta first appears at the 70th segment (Imajima 1967). However, recently, H. parthenopeia as large as H. okudai has been collected (Osman et al 2010) and the possibility of synonymy of H. okudai has been proposed based on morphological observation of both species (Idris and Arshad 2013). Nonetheless, the type locality of H. parthenopeia (Naples, Italy) is far from that of H. okudai (Japan).…”

Section: Discussionmentioning

confidence: 99%

New record of Halla okudai Imajima, 1967 (Annelida, Eunicida, Oenonidae) from Fukue Island in the Goto Islands, Japan

Kobayashi¹,

Mukai²

2020

CheckList

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Halla okudai Imajima, 1967 is an oenonid annelid species that inhabits the intertidal and shallow subtidal zones in China, Malaysia, Australia and Japan. This species is harvested and used as fishing bait in Japan and Malaysia; however, it has been regarded as Near Threatened in Japan based on the categories of the Japanese Red List. Here, we reconstructed the molecular phylogeny of Oenonidae based on 16S rRNA gene sequences. This study provides a new record of H. okudai on Fukue Island, in the Goto Islands, Japan.

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Optimal growth and feeding behaviour of the valuable bait Halla parthenopeia (Polychaeta: Oenonidae) in small-scale rearing systems

Ferri,

Righi,

Prevedelli

et al. 2024

Aquaculture

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Rearing trials of Halla parthenopeia under laboratory conditions (Polychaeta: Oenonidae)

Cited by 7 publications

References 29 publications

Toxicity of the purple mucus of the polychaete <em>Halla parthenopeia</em> (Oenonidae) revealed by a battery of ecotoxicological bioassays

Toxicity of the purple mucus of the polychaete <em>Halla parthenopeia</em> (Oenonidae) revealed by a battery of ecotoxicological bioassays

New record of Halla okudai Imajima, 1967 (Annelida, Eunicida, Oenonidae) from Fukue Island in the Goto Islands, Japan

Optimal growth and feeding behaviour of the valuable bait Halla parthenopeia (Polychaeta: Oenonidae) in small-scale rearing systems

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