7277

• UCREFRP Catalog Number: 7277
• Author: Papoulias, D.
• Title: Survival and Growth of Larval Razorback Sucker,
• USFW Year: 1988.
• Copyright Material: NO

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Fish Data
Survivorship and Growth. There were no statistical differences in
survival of larval razorback suckers among low, medium, and high
fertilization treatments (Fig 5a). Mean survival was 77.0±8.1%,
89.8±6.8-%, and 67.4±15.7$, respectively. Mean larval production in
high and medium treatments as total biomass (29.6±5.9 kg vs. 29.0±2.7
]ag/hectare, respectively) or individual weights (149.6±17.7 mg vs.
132.3±15.5 mg/specimen) did not differ, but each was statistically
different from that in low treatments (15.6±3:5 kg/hectare and
95.7±5.4 mg/specimen; Fig. 5b-c).
Divergence in larval lengths and weights among treatments was
evident between weeks 4 and 6 (Fig. 6a). Weights were significantly
different between high and low treatments after week 4, but were only
so between medium and low treatments at weeks 6 and 8 (Fig. 6b).
Regression analysis of loglo-transformed growth data (log(TL or Wr)
a + b log(time)) indicated significant differences in slcpe between
high and low and medium and low treatments, but none between medium
and high (Table 1). Length-weight regressions showed no differences
among treatments; the overall relationship for razorback sucker larvae
9.4 to 27.3 mm TL is described by the equation:
Log(WT) = -3.452 + 3.9777 log(TL) (r2=.98).
Three of four ponds in each treatment were colonized by tiger
salamanders. Although numbers and biomass of salamander larvae were