"Hyalella azteca " is an important food for many waterfowl.
2.
""'Hyalella azteca " "'is a widespread and abundant species of amphipod crustacean in North America.
3.
It is a nocturnal pelagic predator that feeds almost exclusively on the endemic amphipod " Hyalella montezuma ", which it detects using passive sonar and swallows whole.
4.
The lake also has an endemic species flock of amphipods consisting of 11 " Hyalella " ( an additional Titicaca " Hyalella " species is non-endemic ).
5.
The lake also has an endemic species flock of amphipods consisting of 11 " Hyalella " ( an additional Titicaca " Hyalella " species is non-endemic ).
6.
Two local populations have been described as separate species " Hyalella texana " from the Edwards Plateau of Texas, and " Hyalella montezuma " from Montezuma Well, Arizona.
7.
Two local populations have been described as separate species " Hyalella texana " from the Edwards Plateau of Texas, and " Hyalella montezuma " from Montezuma Well, Arizona.
8.
Stomach contents of two adult specimens revealed a diet consisting of odonate larvae, snails of genus " Littoridina ", and amphipods ( " Hyalella gracilicornis " ); the last were the dominant group.
9.
The absence of " Hyalella azteca " may have allowed speciation to take place in the genus " Gammarus ", with one species entering the vacant niche, and reducing in size to become " G . hyalelloides ".
10.
These included five mayfly genera, three stonefly genera, two beetle genera, two caddisfly genera, two cranefly genera, the dragonfly genus " Stylogomphus ", the riffle beetle genus " Dubiraphia ", and the scud genus " Hyalella ".
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