Reproduction and larval development of Manayunkia aestuarina (Bourne, 1883) (Polychaeta, Sabellidae) in a coastal region of the southern Baltic
Bick, A. (1996). Reproduction and larval development of Manayunkia aestuarina (Bourne, 1883) (Polychaeta, Sabellidae) in a coastal region of the southern Baltic. Helgol. Meeresunters. 50(2): 287-298
In: Helgoländer Meeresuntersuchungen. Biologische Anstalt Helgoland: Hamburg. ISSN 0174-3597, meer
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| Trefwoorden |
ANE, Baltic
Aquatic communities > Benthos
Biological development > Larval development
Reproduction
Manayunkia aestuarina (Bourne, 1883) [WoRMS]; Polychaeta [WoRMS]; Sabellidae Latreille, 1825 [WoRMS]
Baltic Sea [Marine Regions]
Brak water |
| Abstract |
The reproduction and larval development of Manayunkia aestuarina, a polychaete typical of brackish lenitic waters, was studied in a tideless shallow region on the south Baltic coast in 1990. Reaching abundances of up to 50000 ind./m², it is an important element of the benthic community in this area. Reproduction started in late March/early April, when the females deposited their eggs in the tubes. On the average, 4 (maximum: 16) developing embryos were found in a maternal tube during the reproduction period. The females probably produced a mean of about 12 eggs. Development in the maternal tube lasted about 8 weeks. The first juveniles were found outside the tubes in mid-May. The survival rate during the first few weeks was estimated to be 15-20 %. After reproducing, the adult animals survived until October. The changes involved in the development from eggs to juvenile animals are illustrated by drawings. |
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