Portal de Periódicos da CAPES

Effects of neighboring organisms on the growth of three intertidal encrusting cheilostome bryozoans

1994; Inter-Research; Volume: 114; Linguagem: Inglês

10.3354/meps114157

1616-1599

Kutty Selva Nandakumar, Masao Tanaka,

Microplastics and Plastic Pollution

The effects of neighbonng organisms on the growth and mortal~ty of 3 encrusting bryozoan species Celleporana aperta, Sch~zoporella serjahs and Watersjpora subovoidea, were studied on PVC panels suspended in an intertidal area of Tomioka Bay, Japan A total of 24 isolated colonies of C aperta (1 e from which neighbors were experimentally removed) and 27 colonles with neighbors 8 ISOlated colonles of S s e n a l ~s and 14 colonies with neighbors and 6 isolated colonies of W subovoldea and 6 colonies with neighbors were monitored dunng the experiment In all, 11 species belonging to different taxa were identified as the neighbors C aperta, S s e n a l ~s and W subovo~dea growing in the midst of neighbors grew more slowly than did the corresponding isolated colonies Of the 3 species grown in the midst of neighbors W subovo~dea showed the fastest growth rate while C aperta showed the slowest Growth in S s e n a l ~s when with neighbors was inversely related to the size of the colony at the time of contact and directly related to the duration of contact (in days) with the neighbors whde no significant relationship was obtained between its growth and length of interface with the colonies of neighboring organisms In the other 2 species growth was not s~gnif~cantly related with the 3 factors mentioned above Mortality rates were different among the 3 species No mortality occurred in isolated colonies of any of the 3 species, nor in colonies of W subovo~dea grown with the neighbonng organisms In contrast when with nelghbors nearly 15 % and 7 % of colonles of C aperta and S senalls died, respectively