Intraspecific co-variation between egg and body size affects fertilisation kinetics of free-spawning marine invertebrates

Marshall, Dustin J., Styan, Craig A. and Keough, Michael J. (2000) Intraspecific co-variation between egg and body size affects fertilisation kinetics of free-spawning marine invertebrates. Marine Ecology-progress Series, 195 305-309. doi:10.3354/meps195305


Author Marshall, Dustin J.
Styan, Craig A.
Keough, Michael J.
Title Intraspecific co-variation between egg and body size affects fertilisation kinetics of free-spawning marine invertebrates
Journal name Marine Ecology-progress Series   Check publisher's open access policy
ISSN 0171-8630
1616-1599
Publication date 2000
Sub-type Article (original research)
DOI 10.3354/meps195305
Open Access Status DOI
Volume 195
Start page 305
End page 309
Total pages 5
Place of publication Oldendorf, Germany
Publisher Inter-Research
Language eng
Abstract Fertilisation of eggs of free-spawning marine invertebrates depends on factors affecting sperm concentration in the field and also on gamete characteristics such as egg size. In the free-spawning intertidal ascidian Pyura stolonifera mean egg size increased with maternal size in 2 separate populations. The largest ascidian produced eggs that were, on average, 50% greater in volume than the eggs produced by the smallest individual studied. There was no evidence to suggest that egg density varied with adult size and egg dry organic weight increased with maternal size. The fertilisation kinetics of this species were strongly affected by the variation in egg size, with the eggs of large individuals requiring much less concentrated sperm to achieve maximal levels of fertilisation success than the eggs of small individuals. We suggest that variation in egg size between individuals of different sizes and ages may be an important factor in determining fertilisation success for ascidians of this species.
Keyword Ecology
Marine & Freshwater Biology
Oceanography
Fertilisation Dynamics
Egg Size
Ascidian
Situ Fertilization Rates
External Fertilization
Sea-urchin
Sperm Limitation
Consequences
Evolution
Success
Larvae
Traits
Echinodermata
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Biological Sciences Publications
Ecology Centre Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 52 times in Thomson Reuters Web of Science Article | Citations
Google Scholar Search Google Scholar
Created: Mon, 13 Aug 2007, 11:44:32 EST