Aplication of Chitosan for Water Quality and Macrobenthic Fauna Rehabilitation in Vannamei Shrimps (Litopenaeus Vannamei) Ponds, North Coast of Semarang, Central Java - Indonesia

Chitosan was widely known as natural food preservative such as noodle, meat ball, soy-tofu, wide variety offresh vegetables, fruits, meat and fish products, etc. Chitosan is a non-toxic substances, has no side effect ashuman food and was made from the shell of shrimps (Penaeidae), or swimming crabs (Portunus pelagicus).Chitosan is primarily a polysacharids, with β-1,4-2 amino-2-deoxy- β- D-glucopyranose. The biopolymerhas various noble functional characters such as anti-moth, anti-bacterial, coagulating agent for suspension,or heavy metals. This substance had been examined in the Lab of Natural Product, Diponegoro Universityand give a significant effect as bacteriostatic and bactericides for pathogenic bacteria such as Salmonela.sp;Pseudomonas, E.coli, B.subtilis, S.aureus, P.aeruginosa. In the study, liquid chitosan (200 ppm) was used asanti- harmful/ pathogenic bacteria in the brackish water pond so that can eliminate and control the bacterialor virus outbreak which so far is the main problems in the fish and shrimp culture activities. The use ofchitosan in the brackish water ponds was carried out at a semi-traditional ponds at Mangkang Kulon northSemarang coastal area. The experiment had significantly decrease the suspended solid or increase watertransparency, and the organic content ( by 5 %) of the bottom susbtrate. Increase the abundance ofimportant macro-benthic organism such as Polychaeta (7-fold) as important natural feed for the cultured fishand shrimp as well as increase the diversity index of total macro-benthic organism. Decrease the growth ofdisease vector benthic organism such as Cherithidae (Gastropods) by 24.5% . With the application ofchitosan had significantly prevent the outbreak of fish and shrimp disease and increase up to 80 % thesurvival rate of Vanamae, as well as tiger shrimp Penaeus monodon, and polkadot grouper (Cromileptes,sp)in another field application

Description of a new species of Marphysa Quatrefages, 1865 (Polychaeta: Eunicidae) from the west coast of Peninsular Malaysia and comparisons with species from Marphysa group A from the Indo-West Pacific and Indian Ocean

A new species of Marphysa Quatrefages, 1865 (Polychaeta: Eunicidae) is described from the west coast of Peninsular Malaysia and compared with species from Marphysa Group A from the Indo-West Pacific and Indian Ocean. The number of species known within Marphysa Group A has been increased, and the concept that M. mossambica is a widely distributed species in the Indo-Pacific is refuted. The new species is commercially important and occurs in the mangrove forest along the west coast of Peninsular Malaysia. Notes on the biology, ecology and commercial aspects of M. moribidii sp. nov. are presented

Activity of Marphysa gravelyi Southern (Polychaeta) under heterosmotic conditions

Marphysa gravely; Southern is a common polychaete which occurs in the muddy substratum of the brackish-water regions of Madras, where salinities fluctuate over a wide range (Panikkar and Aiyar, 1937). In the laboratory under experimental conditions the worm is able to tolerate dilutions of sea-water ranging from 20-70% without any ill effect

Nutritional status of a nereidid polychaete cultured in sand filters of mariculture wastewater

This study examined the nutritional composition of the intertidal marine polychaete Perinereis helleri (Nereididae)when artificially cultured in sand filters treating mariculture wastewater. Moisture levels in harvested P. helleri ranged from 758 to 855 g kg1, and ash, from 23 to 61 g kg1 wet matter (WM). Stocking density and graded size after harvest significantly affected their composition. Higher total lipid contents were found in large (>0.6 g) P. helleri(16–19 g kg1 WM) and those grown at the lowest density(1000 m2: 18 g kg 1 WM) than in small (≤0.6 g) ones (14 g kg1 WM) and those grown at the highest densities (4000–6000 m2: 13–16 g kg1 WM). Several fatty acids within a very broad profile (some 30 identified) reflected this pattern, yet their ARA/EPA/DHA ratios were relatively unaffected. Feeding the polychaete-assisted sand filters (PASF) with fish meal to increase worm biomass productivity significantly increased their DHA content. Other components (e.g. protein, phospholipids, cholesterol, carbohydrate, amino acids, nitrogen, minerals and bromophenols) and nutritional factors (e.g. maturity, feeding seaweed and endemic shrimp viral content) were also investigated. Results suggest that PASF-produced P. helleri have a well-balanced nutritional profile for penaeid shrimp and fish broodstock

Aportaciones a la taxonomía y autoecología de los anélidos de la península ibérica: poliquetos de la Ría de Ferrol

[Abstract] Contributions to the taxonomy and autoecology of annelids from the iberian peninsula: polychaetes of the ría de Ferrol.- As a result of a wide project guided to characterize the fauna and flora of the Ría de Ferrol (Galicia, NW Spain), we present in this work 12 species of polychaetous annelids from the intertidal area and sublitoral infaunal benthos, of this ría. Phyllodoce Iongipes Kinberg, 1866 and Octobranchus lingulatus (Grube, 1866) are recorded for the first time in the littoral of the Iberian Peninsula. Harmothoe nigra Alaejos, 1905 for the first time after its original description and Vermiliopsis striaceps (Grube, 1862) for the first time in the Atlantic coasts of Spain. The juvenile stages of Marphysa belli (Audouin & Milne-Edwards, 1833) and M. sanguinea (Montagu, 1815) often attributed to other eunicid species, are described. Finally, for six species with a scarce knowledge in our waters, we make some precisions about their morphology and ecology : Phyllodoce groenlandica Oersted, 1843, Paranaitis kosteriensis (Malmgren, 1867), Harmothoe antilopes Mclntosh, 1876, H. ljungmani (Malmgren, 1867), H. longisetis (Grube, 1863) and Gyptis capensis (Day, 1963).[Résumé] Dans le cadre d’un vaste projet d'étude bionomique de la Rfa de Ferrol (NW de l'Espagne, Galice), 12 espèces d'Annélides Polychètes de l'endofaune bentique infralittorale, méritent de etenir l'attention. Phyllodoce longipes Kinberg, 1866 et Octobranchus lingulatus (Grube. 1866) sont deux espèces nouvelles pour le littoral ibérique, tandis que Vermiliopsis striaceps (Grube. 1862), déjà connue de Méditerranée est nouvelle pour le littoral atlantique. Harmothoe nigra Alaejos, 1905 est récoltée pour la seconde fois depuis sa description originale. Les phases juvéniles de Marphysa belli (A udouin & Milne-Edwards, 1833) et M. sanguinea (Montagu, 1815), espèces souvent confondues avec d'autres polychètes Eunicidae, sont décrites. Enfin quelques précisions morphologiques et écologiques sont fournies pour 6 espèces rarement signalées sur le littoral ibérique: Phyllodoce groenlandica Oersted, 1843, Paranaitis kosteriensis (Malmgren, 1867), Harmothoe antilopes Mclntosh, 1876, H. ljungmani (Malmgren, 1867), H. longisetis (Grube, 1863) and Gyptis capensis (Day, 1963).Comisión Interdepartamental de Ciencia y Tecnología de Galicia; XUGA 8031098

Reproductive biology of Diopatra neapolitana (Annelida, Onuphidae), an exploited natural resource in Ria de Aveiro (Northwestern Portugal)

Diopatra neapolitana Delle Chiaje, 1841 (Annelida, Onuphidae) is an important economic natural resource in Ria de Aveiro (northwestern coast of Portugal) and throughout Europe. The species is intensively harvested for use as fresh bait. However, there is only limited knowledge about its life cycle derived from a previous study in Mediterranean Sea. Reproduction and development patterns are known to vary biogeographically, making it important to base management decisions on locally appropriate information. This work examines reproduction patterns for populations from the Eastern Atlantic, which have not previously been assessed, with an eye towards drawing Atlantic–Mediterranean comparisons and informing local management strategies. The study was conducted from May 2007 to April 2009 in Ria de Aveiro. The reproductive biology of D. neapolitana was described from the proportional variation of worms with gametes in the coelom and from the progression of the oocyte diameter. Individuals with gametes inside the coelom were found all year round, but the peak reproductive period occurred between May and August, when almost all individuals had gametes in the coelom and females contained more oocytes than at any other time of the year. The overall male:female ratio was close to 1:1 and the oocyte diameter ranged from 40 to 240 μm. In vitro fertilization was performed and the results compared to other studies. Based on the present results, some protection measures are suggested to implement a sustainable exploitation of the species

Open-access journal Aquatic Invasions: an important part of the developing European information and early warning system on invasive alien species

Aquatic Invasions is considered as an example of an effective information sharing tool, currently helping to increase prompt reporting of records of new invasive species threatening European biodiversity

Six new records of intertidal polychaetes from Pakistan

This paper describes six species of polychaete worms, which are new records from Pakistan. The species are: Arabella iricolor (Montagu), Capitella capitata (Fabricius), Mesochaetopterus sagittarius (Claparede), Phyllochaetopterus herdmani Willey, Lysidice natalensis Kinberg and Marphysa depressa (Schmarda)