Table 1. Survival of Thalassia testudinum seedlings and rhizomes with
short shoots in moderately and severely impacted areas.


Area
Moderately
impacted:
Plot 1
Plot 2
Plot 3
Plot 4


Severely
impacted:
Plot 1
Plot 2


Initial number
and kind of plants
36 seedlings
36    "
36    "
16 rhizomes with
short shoots


36 seedlings
16 rhizomes with
short shoots


Nunber of plants
surviving after 7 months


20
22
18


12


16


12


Discussion
Halodule wrightii has previously been transplanted by various
methods. Planting units have consisted of plugs (plants with sediments
intact, placed in a hole in the substrate; Van Breedveld 1975), or ex-
cavated rhizome material anchored to the substrate with construction
rod (Phillips 1980), cement rings (Continental Shelf Associates, Inc.
1982), or cut coathangers (Fonseca et al. 1981b). The method used in
this project employed an inexpensive, easily handled anchoring device
and donor plant material which does not require removal of the main
plant from the substrate.
To date, the only work done with direct use (not cultivation of


150


Percent
survi val
55%
61%
50%
75%


44%


75%