An introduction to the analysis of nereis succinea

The effect of body size on digestive chemistry and absorption efficiencies of food and sediment-bound organic contaminants in Nereis succinea Polychaeta. Journal of Experimental Marine Biology and Ecology Phylogeny of nereidids Polychaeta, Nereididae with paragnaths. Short-term influence of recolonisation by the polychaete worm Nereis succinea on oxygen and nitrogen fluxes and denitrification:

An introduction to the analysis of nereis succinea

Advanced Search Abstract Nereis succinea and Platynereis dumerilii Annelida, Polychaeta are broadcast spawners and reproduce semelparously. The final events in reproduction, swarming and spawning are co-ordinated by sex pheromones.

This threshold is lower than those reported for natural pheromones nereithione: Other oil fractions showed additional effects, blocking pheromone reception or narcotising and intoxicating animals.

Part of these effects could be assigned to naphthalenes at levels down to approx. In the original mixtures, their action was modified or compensated by the presence of gamete release inducing alkylated benzenes.

Other highly paralysing substances remained elusive. The species Platynereis dumerlii and Nereis succinea are both broadcast spawners that use environmental cues temperature and lunar periodicity for induction of metamorphoses into the mature heteronereid and timing of spawning and a bouquet of chemical signals for the co-ordination of the actual spawning behaviour Hauenschildt, ; Kinne, ; Hardege et al.

The first chemical signal described as a sex pheromone in P. A number of other volatile, low molecular mass compounds e. Although the exact role of these compounds in the reproduction of nereids remains uncertain to date, their presence gives rise to the hypothesis of interference from compounds derived from crude oil and their breakdown products.

Such effects had been reported previously in lobster and other crustaceans Atema, ; Takahashi and Kitteredge, but generally little is known about effects of pollutants derived from petroleum on chemical communication systems. The findings were in accordance with those at other sites close to either busy shipping routes or major combustion sources Gschwendt et al.

Permanent pollution of the marine environment by diffuse sources at levels that exceeded the reported thresholds for pheromone action of 5M3H Zeeck et al. These demonstrated that petroleum derived pollutants impact the reproduction of both species at a sublethal level of approx.

The biological activity was found in a distillate fraction of the oil that included n-nonane to n-dodecane.

An introduction to the analysis of nereis succinea

Males of both species responded with release of gametes but females showed no responses Beckmann et al. Here we report the results of further studies that aimed to identify the components in petroleum that are responsible for release of gametes in male specimen of P.

Adults were separated by gender at its first clear indication after start of metamorphosis, which occurred with a semi-lunar periodicity.

Marine Species Identification Portal : Cerianthus lloydii

Only animals that had left their tubes and started swarming were used for behavioural assays. A temporary culture was established to secure supply of heteronereids in the winter months.

Swarming heteronereids for bioassays were directly taken from the water layer. A single already swarming specimen was introduced into the dish and the sample deposited into its swimming path with a pipette or microlitre syringe Hamilton.

INTRODUCTION

A release of gamete was recorded when the specimen released a clearly visible amount of gametes after increasing its swimming velocity within 45 min after addition of the sample.Peptide pheromones in female Nereis succinea.

Introduction Communication between organisms by chemical signals is a widespread behavioral phenomenon. The bioactivity of the seawater samples collected from the females swimming for 4 h and the HPLC analysis of these ‘conditioned seawater’ samples show that females excrete at least Neanthes succinea occurs in Iranean Gulf (as Nereis alatopalpis) and in southeastern Australia, where it was forst recorded in (Hewitt et al., ).

Ecology N. succinea is a deposit-feeder preferentially inhabiting soft bottoms from intertidal to about 20 m depth (Wolff, ). Short-term influence of recolonisation by the polychaete worm Nereis succinea on oxygen and nitrogen fluxes and denitrification: a microcosm simulation.

Hydrobiologia . 1 Modeling mate-finding behavior of the swarming 2 polychaete, Nereis succinea, with TangoInSilico, a scientific 3 workflow based simulation system for sexual searching 4 Xubo Fei1, Shiyong Lu1, Thomas Breithaupt2, Jörg D.

Hardege2, 5 Jeffrey L. Ram3* 6. Alitta succinea (known as the pile worm or clam worm) is a species of marine annelid in the family Nereididae (commonly known as ragworms or sandworms). It has been recorded throughout the North West Atlantic, as well as in the Gulf of Maine and South Africa.

The spawning behavior of males of the polychaete Nereis succinea is known to be triggered at close range by a high concentration (>~10!7 M) of pheromone, cysteine glutathione disulfide (CSSG), released by .

Nereis: What Is The Meaning Of The Name Nereis? Analysis Numerology Origin