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100%
90%
80%
70%
Falling
High
Rising
Low
60%
50%
40%
30%
20%
10%
0%
Venezuela (n=36)
Peru (n=18)
Bolivia (n=63)
Figure 4. Neonates per season, as percent of all neonates observed within a study area (n= number of
neonates observed). Venezuela was not sampled during high water (McGuire and Aliaga-Rossel 2007).
12%
falling
low
rising
high
10%
8%
6%
4%
2%
0%
Peru
Bolivia
Venezuela
Figure 5. Neonates as a percent of all Inia observed within a season and study area. Venezuela was not
sampled during high water (McGuire and Aliaga-Rossel 2007).
Inia mating behavior in Peru was observed in all seasons and was not significantly
associated with season 2 = 3, df = 3, P = 0.40, n =11). Mating behavior was observed only
during falling and low water in Bolivia ( n=14 ). Mating was not observed in Venezuela.
A review of published and unpublished studies from Bolivia, Brazil, Colombia, Ecuador,
Peru and Venezuela indicate geographic variation in seasonality of Inia reproduction (Table
6).
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