Algal blooms decrease care but increase egg survival in a fish with paternal care |
| |
Authors: | Marja Järvenpää Kai Lindström |
| |
Institution: | 1.Biological and Environmental Sciences,University of Helsinki,Helsinki,Finland;2.Environmental and Marine Biology,?bo Akademi University,Turku,Finland |
| |
Abstract: | Human-induced eutrophication, resulting in algal blooms and increased water turbidity, is an alarming problem in aquatic systems.
Here, we experimentally tested the impact of algal turbidity on parental care, egg fanning, and time in the nest, in the sand
goby, Pomatoschistus minutus, a fish with uniparental male care. We allowed males to care for their eggs in either clear water or water made turbid by
planktonic algae. In the early brood cycle, males fanned their eggs less in turbid than in clear water, but this difference
disappeared later. Despite decreased care, egg survival was higher in turbid conditions, indicating that early fanning may
partly be redundant for egg survival and perhaps used more as courtship. Males also spent more time out of their nest in turbid
water, perhaps as a means to encounter additional females under conditions of low visibility. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|