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- Title
Observations Concerning Reproductive Temperature Requirements of Captive Lahontan Cutthroat Trout.
- Authors
BIGELOW, JOHN P.; RAUW, WENDY M.; GOMEZ-RAYA, LUIS
- Abstract
The effects of holding temperature during late oocyte development and spawning on the timing of ovulation, fecundity, and egg survival in female Lahontan cutthroat trout Oncorhynchus clarkii henshawi in three postovulatory regimes were investigated. The timing of ovulation was similar for females held at 7.2°C and 12.4°C from 2.5 to 6.0 months before the time of ovulation until spawning. Mean fecundity was higher for females held at 7.2°C. Mean egg eye-up, hatch, and swim-up rates were also higher for females held at 7.2°C. Eggs collected 1, 4, and 7 d postovulation exhibited similar survival rates within females regardless of holding temperature.
- Subjects
CUTTHROAT trout; ONCORHYNCHUS; TROUT; FISHES; SPAWNING; REPRODUCTION
- Publication
North American Journal of Aquaculture, 2009, Vol 71, Issue 3, p252
- ISSN
1522-2055
- Publication type
Article
- DOI
10.1577/A08-064.1