Introduction The purpose of many ecological studies is to identify interactions between faunistic... more Introduction The purpose of many ecological studies is to identify interactions between faunistic ecosystem components by means of laboratory and field experiments. It has often been shown that abiotic and biotic factors such as competition, disturbance and predation influence the composition and dynamics of macrobenthos communities (REISE, 1977; COMMITO and AMBROSE, 1985; AMBROSE, 1986; BEUKEMA, 1987; KIKUCHI, 1987; REDMOND and SCOTT, 1989; COMMITO and BANCAVAGE, 1989; MATILA and BONSDORFF, 1989; HILL et al., 1990). Experiments have also been performed to detect interactions between macrofauna and meiofauna (BELL & Coull, 1978; REISE, 1979; GEE et al., 1985; ALONGI and TENORE, 1985). The interactions between Nereidae and infauna that are common in shallow water and are fairly easily handled have been a major topic of study (COMMITO, 1982; REISE, 1979b; COMMITO and SCHRADER, 1985; OLAFSON and PERSSON 1986; RONN et al., 1988). The purpose of our studies was to investigate the influen...
The reproductive biology of Marenzelleria viridis (Verrill, 1873) from the Darss-Zingst Bodden Ch... more The reproductive biology of Marenzelleria viridis (Verrill, 1873) from the Darss-Zingst Bodden Chain (south coast of the Baltic) has been investigated from October 1991 to March 1993. In 1992, gametogenesis started in mid-May. The reproductive system is limited to the central region of the body. The gonads (one pair/segment) developed on the peritoneum near the metanephrides and lie ventrolaterally in the front part of each epitokal segment. All worms reached maturation simultaneously in 1992. The sex ratio was 1:1. Spawning occured in mid-September in 1992. Larval development was entirely pelagic. At the 3-4 setiger stage the final yolk granules had disappeared and the larvae became planktotroph. Larval growth was interrupted at the 3-setiger stage below 5‰. After 4 weeks the larvae reached the 16-19 setiger stage and started to metamorphose.
Pholoe longa (O.F. M€ uller, 1776) and Pholoe minuta (Fabricius, 1780), two of the earliest descr... more Pholoe longa (O.F. M€ uller, 1776) and Pholoe minuta (Fabricius, 1780), two of the earliest described polychaete species from the Arctic, are redescribed. Freshly collected specimens from the type locality in Western Greenland were used for a combined morphological and molecular approach to reassess the identity of the species, and to study their phylogeny and distribution. Illustrated descriptions are presented and neotypes are designated. Staining with Shirlastain A was found to be an appropriate method for confocal laser scanning microscopy (CLSM) studies. An extended data set, including publicly available data along with our newly provided sequences, was analysed. It was revealed that taxonomic problems had obviously prevented the correct designation of barcodes in public databases, and consequently a number of entries are suggested to require correction. Phylogenetic reconstructions and species delimitation analyses based on cytochrome c oxidase subunit I (COI) data revealed the occurrence of at least seven species of Pholoe in the Arctic and subarctic regions, with P. longa and P. minuta among them. Pholoe longa shows a broad distribution and a geographic pattern in the COI network, but has low genetic divergence. Pholoe minuta exhibits a narrow distribution range, but has high genetic divergence with a large number of low-frequency haplotypes. The geographic pattern observed for P. longa suggests a strong influence of the last ice ages on the distribution in the Arctic.
Mitteilungen Aus Dem Museum Fur Naturkunde in Berlin Zoologisches Museum Und Institut Fur Spezielle Zoologie, 1985
An identification key for the polychaetes of the Baltic Sea is presented in this contribution. It... more An identification key for the polychaetes of the Baltic Sea is presented in this contribution. It comprises all species (a total of 117) that have been mentioned in the available literature as having been found in the region fro'm Kiel Bight to the northern and eastern parts of the Baltic. The most important taxonomical characters of these polychaetes are illustrated (393 figures on 45 plates). An attempt has also been made to take into account the meristic features of the polychaetes occurring under brackish water conditions in the Baltic. A brief diagnosis is given for all Baltic species, together with an outline of their distribution and ecology.
... email: doris.schiedek@io warnemende.de 00220981 97 17.00 1997 Eisevier Science BV All rights ... more ... email: doris.schiedek@io warnemende.de 00220981 97 17.00 1997 Eisevier Science BV All rights reserved Pll 500220981(96)027141 86 ... Yancey et al., 1982) formation of octopine facilitates the breakdown of phosphoLarginine by removal of arginine (Zammit and Newshoime ...
The aim of this study is to solve taxonomic problems pertaining to Spio filicornis (O.F. Müller, ... more The aim of this study is to solve taxonomic problems pertaining to Spio filicornis (O.F. Müller, 1776). The original description by O. F. Müller was very brief and type material was not deposited. Based on the literature the confusion about the identity of the species has been tremendous; e.g., it was only recently realized that at least two different species from the North and Baltic Seas could be identified as S. filicornis . The present study is based on material collected by the authors in 2009 at the type locality in Iluilârssuk, near Paamiut, SW Greenland. Spio filicornis is redescribed in detail and illustrated comprehensively. A neotype has been designated and deposited in the collection of Rostock University. Species formerly referred to as S. cf. filicornis from the North and Baltic Seas (Bick et al. 2010) are formally described as two new species, Spio arndti sp. nov., and S. symphyta sp. nov. The morphological diagnostic characters within Spio are discussed. Information on three molecular markers (16S rDNA, 18S rDNA, cytochrome c oxidase subunit I) is also provided. The genetic divergence between the three Spio species corroborates the taxonomic discrimination.
Introduction The purpose of many ecological studies is to identify interactions between faunistic... more Introduction The purpose of many ecological studies is to identify interactions between faunistic ecosystem components by means of laboratory and field experiments. It has often been shown that abiotic and biotic factors such as competition, disturbance and predation influence the composition and dynamics of macrobenthos communities (REISE, 1977; COMMITO and AMBROSE, 1985; AMBROSE, 1986; BEUKEMA, 1987; KIKUCHI, 1987; REDMOND and SCOTT, 1989; COMMITO and BANCAVAGE, 1989; MATILA and BONSDORFF, 1989; HILL et al., 1990). Experiments have also been performed to detect interactions between macrofauna and meiofauna (BELL & Coull, 1978; REISE, 1979; GEE et al., 1985; ALONGI and TENORE, 1985). The interactions between Nereidae and infauna that are common in shallow water and are fairly easily handled have been a major topic of study (COMMITO, 1982; REISE, 1979b; COMMITO and SCHRADER, 1985; OLAFSON and PERSSON 1986; RONN et al., 1988). The purpose of our studies was to investigate the influen...
The reproductive biology of Marenzelleria viridis (Verrill, 1873) from the Darss-Zingst Bodden Ch... more The reproductive biology of Marenzelleria viridis (Verrill, 1873) from the Darss-Zingst Bodden Chain (south coast of the Baltic) has been investigated from October 1991 to March 1993. In 1992, gametogenesis started in mid-May. The reproductive system is limited to the central region of the body. The gonads (one pair/segment) developed on the peritoneum near the metanephrides and lie ventrolaterally in the front part of each epitokal segment. All worms reached maturation simultaneously in 1992. The sex ratio was 1:1. Spawning occured in mid-September in 1992. Larval development was entirely pelagic. At the 3-4 setiger stage the final yolk granules had disappeared and the larvae became planktotroph. Larval growth was interrupted at the 3-setiger stage below 5‰. After 4 weeks the larvae reached the 16-19 setiger stage and started to metamorphose.
Pholoe longa (O.F. M€ uller, 1776) and Pholoe minuta (Fabricius, 1780), two of the earliest descr... more Pholoe longa (O.F. M€ uller, 1776) and Pholoe minuta (Fabricius, 1780), two of the earliest described polychaete species from the Arctic, are redescribed. Freshly collected specimens from the type locality in Western Greenland were used for a combined morphological and molecular approach to reassess the identity of the species, and to study their phylogeny and distribution. Illustrated descriptions are presented and neotypes are designated. Staining with Shirlastain A was found to be an appropriate method for confocal laser scanning microscopy (CLSM) studies. An extended data set, including publicly available data along with our newly provided sequences, was analysed. It was revealed that taxonomic problems had obviously prevented the correct designation of barcodes in public databases, and consequently a number of entries are suggested to require correction. Phylogenetic reconstructions and species delimitation analyses based on cytochrome c oxidase subunit I (COI) data revealed the occurrence of at least seven species of Pholoe in the Arctic and subarctic regions, with P. longa and P. minuta among them. Pholoe longa shows a broad distribution and a geographic pattern in the COI network, but has low genetic divergence. Pholoe minuta exhibits a narrow distribution range, but has high genetic divergence with a large number of low-frequency haplotypes. The geographic pattern observed for P. longa suggests a strong influence of the last ice ages on the distribution in the Arctic.
Mitteilungen Aus Dem Museum Fur Naturkunde in Berlin Zoologisches Museum Und Institut Fur Spezielle Zoologie, 1985
An identification key for the polychaetes of the Baltic Sea is presented in this contribution. It... more An identification key for the polychaetes of the Baltic Sea is presented in this contribution. It comprises all species (a total of 117) that have been mentioned in the available literature as having been found in the region fro'm Kiel Bight to the northern and eastern parts of the Baltic. The most important taxonomical characters of these polychaetes are illustrated (393 figures on 45 plates). An attempt has also been made to take into account the meristic features of the polychaetes occurring under brackish water conditions in the Baltic. A brief diagnosis is given for all Baltic species, together with an outline of their distribution and ecology.
... email: doris.schiedek@io warnemende.de 00220981 97 17.00 1997 Eisevier Science BV All rights ... more ... email: doris.schiedek@io warnemende.de 00220981 97 17.00 1997 Eisevier Science BV All rights reserved Pll 500220981(96)027141 86 ... Yancey et al., 1982) formation of octopine facilitates the breakdown of phosphoLarginine by removal of arginine (Zammit and Newshoime ...
The aim of this study is to solve taxonomic problems pertaining to Spio filicornis (O.F. Müller, ... more The aim of this study is to solve taxonomic problems pertaining to Spio filicornis (O.F. Müller, 1776). The original description by O. F. Müller was very brief and type material was not deposited. Based on the literature the confusion about the identity of the species has been tremendous; e.g., it was only recently realized that at least two different species from the North and Baltic Seas could be identified as S. filicornis . The present study is based on material collected by the authors in 2009 at the type locality in Iluilârssuk, near Paamiut, SW Greenland. Spio filicornis is redescribed in detail and illustrated comprehensively. A neotype has been designated and deposited in the collection of Rostock University. Species formerly referred to as S. cf. filicornis from the North and Baltic Seas (Bick et al. 2010) are formally described as two new species, Spio arndti sp. nov., and S. symphyta sp. nov. The morphological diagnostic characters within Spio are discussed. Information on three molecular markers (16S rDNA, 18S rDNA, cytochrome c oxidase subunit I) is also provided. The genetic divergence between the three Spio species corroborates the taxonomic discrimination.
Uploads
Papers by Andreas Bick