Shorty from first glance I would say there is little difference in survivability of LMB and SMB past the fry stage (on their on). I don't think it is just a question of incubation time as they are very vulnerable up until the male leaves which is a while after hatching. I will keep looking . Check your mail.
Smallmouth Bass from - Factors Affecting Fry Production of Smallmouth Bass
Bass nests were located mainly in areas
sheltered from direct wind and wave action
and partially protected from predators by submerged
rocks or logs. Nests were scooped out
in coarse gravel and fist-sized rubble, several
nests being used in successive years. Water
depths at 17 nests averaged 84 cm with a
mean nest diameter of 61 cm. The major
spawning period for both years occurred during
the last week in May (Fig. 1). A second
spawning occurred in mid-June 1972 after
a drop in water temperature. Eggs hatched
between 4 and 5 days in early June; hatching
during the second spawning period took 94
h at a mean temperature of 19 C. Sac-fry
continued development in the nest for an additional
6-7 days and began rising 11 days
after hatching.
Largemouth Bass from -
http://srac.tamu.edu/index.cfm?catid=6 SRAC 200 Largemouth Bass: Biology and Life History
Spawning with multiple females is common. Females normally release about one-half of their
eggs during the first spawn and half of the remaining during the second spawn. A third spawn up to 1 month later is common. Females average about 4,000 eggs per pound of body weight, but the number can be quite variable. Reports of up to 80,000 eggs from one female have been reported
but the average is much smaller. Larger fish tend to have larger eggs and therefore larger fry but fewer eggs per pound of body weight. Usually at spawning the weight of eggs in females will be 10 percent or more of her body
weight. During the spawning season the male does not eat and many males die each year due to
their poor body condition prior to the spawning period. Males attempt to guard the nest and fan the silt away from the eggs until they hatch. If he is successful, eggs hatch in 2 to 4 days in the southern U.S., depending on water temperature. The male will continue to guard the fry until they disperse, which may be a period of 2 weeks or more depending on temperatures. In
nature, most nests are lost to sunfish predation.
Nesting success is also reduced if the temperature drops below 60o F. This temperature usually causes the male to leave the nest. Without parental care the eggs will not hatch and predation will be increased. The fry feed on the yolk sac of the egg for the first few days. At 68o F they will develop mouthparts in about 190 hours. Fry swim up when they are about 8 days old and begin feeding on zooplankton (cladocerans, rotifers, copepods). They remain
in a school, guarded by the male, for 2 to 7 more days before dispersing. They continue to feed on zooplankton and add insect larvae and fish to their diet when about 2 inches long.
Normally fry feed about every three hours as this is the length of time necessary for food to pass through the gut. Adult bass are often observed to feed after about 14 to 24 hours depending on the size of prey devoured.
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