. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. PHYSIOLOGY OF MARTESIA CUNEIFORMS 173 50 30- 1 I g 20- 10- 8- 6- 5- 4- 3-. A \ \ \ r I'M LIVE WEIGHT (CMS) - <* ,1 b § FIGURE 3. Double logarithmic plots of respiration rate (O) and ammonia excretion rate (A) versus live weight for individual adult Marlesia cuneiformis. R = (r = , n = 29, P < ); E = (r = , n = 19, P < ). Srinivasan and Krishnaswamy (1964) for Martesia fragilis. The gonad of M. cu
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. PHYSIOLOGY OF MARTESIA CUNEIFORMS 173 50 30- 1 I g 20- 10- 8- 6- 5- 4- 3-. A \ \ \ r I'M LIVE WEIGHT (CMS) - <* ,1 b § FIGURE 3. Double logarithmic plots of respiration rate (O) and ammonia excretion rate (A) versus live weight for individual adult Marlesia cuneiformis. R = (r = , n = 29, P < ); E = (r = , n = 19, P < ). Srinivasan and Krishnaswamy (1964) for Martesia fragilis. The gonad of M. cunei- formis can develop rapidly as the functional foot degenerates and spawning can occur prior to the development of a complete callum. The major peak of larval settlement in the Beaufort, North Carolina area apparently occurs during late summer and early fall. No comparable data could be found on this or similar pholad species; however, this data is in contrast to that for larval settlement of the Teredinid Bankia gouldi Bartsch which peaks in late spring and early summer at the same location (Mann and Gallager, unpubl.). The greatest larval settlement density of individuals/sq. m for Martesia cuneiformis, is also sub- stantially lower than that of B. gouldi (, 8500 m in June; Mann and Gallager, unpubl.). A lower fecundity in M. cuneiformis and crowding of the substrates by late summer may be controlling factors of competition for space. The maximum shell growth of mm/month for Martesia cuneiformis is typical for this species with Martesia striata growing slightly faster at similar temperatures (Turner, per. comm.). Spawning of gravid Martesia cuneiformis in the laboratory was observed only in response to physical disturbance during dissection from the wood or after thermal stimulation. This is unlike Martesia striata which spawns spontaneously at 21°C (Boyle and Turner, 1976). The first shelled veliger of M. striata is, at ^m long and nm in
Size: 1718px × 1455px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
