首页   按字顺浏览 期刊浏览 卷期浏览 Survival and Hatching Success of Stonefly Eggs (Paragnetina media) Following Ingestion ...
Survival and Hatching Success of Stonefly Eggs (Paragnetina media) Following Ingestion by Three Stream Fishes

 

作者: ChristopherF. Hartleb,   SunshineA. Timm,  

 

期刊: Journal of Freshwater Ecology  (Taylor Available online 2000)
卷期: Volume 15, issue 1  

页码: 107-114

 

ISSN:0270-5060

 

年代: 2000

 

DOI:10.1080/02705060.2000.9663726

 

出版商: Taylor & Francis Group

 

数据来源: Taylor

 

摘要:

The effects of predation by three stream fishes (emerald shiner, creek chub, and mottled sculpin) on the survival and hatching success of eggs of the northern stonefly,Paragnetina media(Walker), were investigated with feeding and incubation experiments. Stonefly eggs displayed a 75% survival rate through the digestive system, but no statistically significant difference (p > 0.05) was observed in the recovery of intact eggs from the three fishes. Approximately 73% of the eggs that passed through the emerald shiners and mottled sculpins hatched within 60 days. Significantly fewer eggs (p = 0.002, 63%) hatched following passage through the creek chubs. Previous studies have shown that stonefly eggs can survive periods of freezing, desiccation, and harsh physical conditions. The present study shows that stonefly eggs can also survive passage through the digestive system of predatory stream fishes and this may represent a previously uninvestigated mechanism for localized dispersal.

 

点击下载:  PDF (771KB)



返 回