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MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser
 

Summary: MARINE ECOLOGY PROGRESS SERIES
Mar Ecol Prog Ser
Vol. 318: 7580, 2006 Published August 3
INTRODUCTION
Planktonic embryos are among the least protected
and most vulnerable marine embryos (Staver & Strath-
mann 2002). Average embryonic mortality rates of
Calanus finmarchicus in the Norwegian Sea amount to
82.8% d1
, suggesting that only 2.7% of the eggs sur-
vive to the first larval stage (Ohman & Hirche 2001).
Due to investments such as the development of resis-
tance to predators, mortality risk decreases as plank-
ton develop from eggs to adults. Developmental time is
therefore a critical factor determining risk exposure at
different ontogenetic stages. Slower development gen-
erally translates to longer exposure and higher risk.
Strathmann et al. (2002) showed that planktonic
embryos with short developmental times prior to first
swimming tend to be strongly selected, and that this

  

Source: Aksnes, Dag L. - Institutt for biologi, Universitetet i Bergen

 

Collections: Environmental Sciences and Ecology; Biology and Medicine