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- Title
Zebra mussel maturation and seasonal gametogenesis in Marion Reservoir, Kansas, USA.
- Authors
Delmott, Skyler E.; Edds, David R.
- Abstract
Based on its native distribution and temperature constraints, the invasive zebra mussel (Dreissena polymorpha) was not expected to colonize southern portions of the U.S., but it has now spread from the Laurentian Great Lakes to the Gulf of Mexico. Temperature is critical in zebra mussel reproduction, yet no studies have compared gametogenesis in the cooler north vs. the warmer south. We studied zebra mussel seasonal gametogenesis in Marion Reservoir, Kansas, histologically, examining monthly gonad development and categorizing mussels into one of five stages: resting, early development, late development, mature, or reabsorbing. We also histologically examined multiple size classes to determine size at maturity, and measured juveniles on artificial substrates in the reservoir to determine time to maturity. Adults were mature March-August (at 7.8-34.6°C), compared to mid-June-September (at 18-24°C) in the Great Lakes. Sixty percent of zebra mussels were mature at 5 mm; 100% were mature at 7 mm, compared to 7.5-10 mm in the northern U.S. and 5-12 mm in Europe. Zebra mussels reached maturity within 4 weeks compared to 5 weeks in the Great Lakes and Europe. We conclude that zebra mussels in Kansas matured faster, at a smaller size, and that there could be multiple generations within one year, possibly contributing to greater spread across the region.
- Subjects
DEVELOPMENTAL biology; GAMETOGENESIS; BIOCHEMICAL substrates; INTERSEX people; ZEBRA mussel; MARION Reservoir (Kan.); REPRODUCTION
- Publication
BioInvasions Record, 2014, Vol 3, Issue 4, p247
- ISSN
2242-1300
- Publication type
Article
- DOI
10.3391/bir.2014.3.4.06