Adult net-spinning caddisfly (Hydropsyche spp.) catch rates and morphology from large rivers of the southwestern United States, 2015-2016

Publication Date

2020-08-14

Time Period

2015

Time Period

2017

Metcalfe, A.N., 2020, Adult net-spinning caddisfly (Hydropsyche spp.) catch rates and morphology from large rivers of the southwestern United States, 2015-2016: U.S. Geological Survey data release, https://doi.org/10.5066/P94N7GI9.

Type: Related Primary Publication

The purpose of these data are to describe the distribution, abundance, and morphology of Hydropsyche, a widespread and diverse genus of net-spinning caddisflies, in the Colorado River Basin. We used these data on adult emergent Hydropsyche to model species specific abundance across the Colorado River Basin relative to river discharge, stage change, mean temperature, temperature range, latitude, and day of capture. We also used these data to see if these species of Hydropsyche physiologically express sexual dimorphism by comparing length to width ratios of mesothoracic tibial and first tarsal segments among males and females within species. Presence of sexual dimorphism in these species in which adult females have wider tibial and tarsal segments indicates that females are adapted for swimming and deep-water oviposition. Understanding species specific distribution and morphology as it relatives to environmental variables and life history is critical for understanding changes and differences in population dynamics in rivers.

• USGS Data Release Products
• USGS Southwest Biological Science Center (SBSC)