Length: 5-7 mm. As with many other troglodyte (deep cave dwelling) species, this amphipod is translucent, without pigment and completely blind. The Quatsino species is typical of amphipods, with a body composed of 13 segments which can roughly be grouped into the head, pereon (thorax) and pleon (abdomen). The legs and antennae are of various lengths with numerous sensory hair-like structures. The longer antenna of both sexes equals approximately 50% of the body length. Males are similar to females except the frontal section of the gnathopod (claw like structures used for grasping and feeding) of the males are larger. Females carry eggs in a ventral brood pouch formed by projections in the first segment of the first five of seven legs. Juveniles hatch as miniatures of adults.
British Columbia’s Coast Region Species & Ecosystems of Conservation Concern SPECIES PROFILE: Quatsino Cave Amphipod (Stygobromus quatsinensis), Family Crangonyctidae
Alaska Department of Fish and Game. 2006. Our Wealth Maintained: A Strategy for Conserving Alaska’s Diverse Wildlife and Fish Resources. Alaska Department of Fish and Game, Juneau, Alaska. Xviii=824 p. - B.C. Conservation Data Centre. [Internet] . Species Summary: Stygobromus quatsinensis. BC. Ministry of Environment and BC Ministry of Forests and Range [Internet] [Updated January 25 2006]. Forests Practices Branch, Karst and Caves. - Carlson K. R. 1997. The distribution of troglobitic and troglophilic invertebrates in southeast Alaska. Proceedings of the 1997 Karst and Cave Management Symposium/13th National Cave Management Symposium, October 7-10. Bellingham, ashington. Pp. 28-33. - Holsinger, J.R. and D.P. Shaw. 1987. Stygobromus quatsinensis, a new amphipod crustacean (Crangonyctidae) from caves on Vancouver Island, British Columbia, with remarks on zoogeographic relationships. Can. J. Zool. 65:2202–2209. - Holsinger, John R. et al. 1997. Biogeographic Significance of Recently Discovered Amphipod Crustaceans (Stygobromus) in Caves of Southeastern Alaska and Vancouver Island. Proceedings of the 12th International Congress of Speleology, 1997. Switzerland. Vol. 3. - Proulx, Gilbert et al. 2003. A Field Guide to Species at Risk in the Coast Forest Region of British Columbia. Published by International Forest Products and BC Ministry of Environment. Victoria (BC). - Shaw, Patrick. 2004. [Internet]. Accounts and Measures for Managing Identified Wildlife. Accounts V. Quatsino Cave Amphipod Stygobromus quatsinensis - Stokes, Tim et al. 2010. [ Internet] [Updated July 21 2010]. Compendium of Forest Hydrology and Geomorphology in British Columbia. Chapter 11 – Karst Geomorphology, Hydrology, and Management. FORREX Forum for Research and Extension in Natural Resources.
Species Profile prepared by: Pamela Zevit and Paul Griffiths for the South Coast Conservation Program (SCCP) in partnership with: International Forest Products (Interfor), Capacity Forestry (CapFor) and Species at Risk & Local Government: A Primer for BC. Original funding for this project was made possible through the Sustainable Forestry Initiative (SFI): http://www.sfiprogram.org/ Updated and revised by: Isabelle Houde, RPBio in consultation with the SCCP. Part of the National Conservation Plan, this project was undertaken with the financial support of the Government of Canada. Dans le cadre du Plan de Conservation National, ce projet a été réalisé avec l’appui financier du Gouvernement du Canada. Every effort has been made to ensure content accuracy. Comments or corrections should be directed to the South Coast Conservation Program: firstname.lastname@example.org. Content updated March 2015. Image Credits: Quatsino Cave Amphipod: Paul Griffiths, Gammarus lacustris: Stan Eisen (Christian Brothers University, Memphis TN), Habitat: BC Ministry of Forests and Range. Only images sourced from “creative commons” sources (e.g. Wikipedia, Flickr, U.S. Government) can be used without permission and for non-commercial purposes only. All other images have been contributed for use by the SCCP and its partners/funders only.