In situ rates of fertilization among broadcast spawning gorgonian corals.

From: The Biological Bulletin | Date: February 1, 1996| Author: | Copyright information

Fertilization rates among marine benthic taxa have implicitly been assumed to be uniformly high in most analyses of life history evolution, but in situ fertilization rates during natural spawning events are rarely measured. Fertilization rates of the Caribbean gorgonians Plexaura kuna and Pseudoplexaura porosa were measured at a site in the San Blas Islands, Panama, by collecting eggs downstream of colonies during synchronous spawning events during the summer months in the years 1988-1994. Eggs collected by divers were incubated, and the proportion of eggs that developed was determined. ...

Related newspaper, magazine, and trade journal articles from HighBeam Research

(Including press releases, facts, information, and biographies)

Effects of spatial distribution and reproductive biology on in situ fertilization rates of a broadcast-spawning invertebrate.
; ...whether low fertilization rates are caused by sperm limitation, whether fertilization rates limit reproductive...occur, low fertilization rates have generally...attributed to sperm limitation. The only...Young, 1995). Sperm limitation is not ...
Importance of spatial population characteristics on the fertilization rates of sea urchins.
; Introduction Fertilization success of...predicting fertilization rates under field...resulting in low fertilization rates except at...could expect fertilization rates below 70...notion of sperm limitation in natural...decrease in sperm ...
Synthetic estrogen hampers trout fertility. (Spawning Trouble).
; ...further work showed EE2's effect on reproduction. To measure fertilization rates, Schultz's team checked how many embryos were present...estrogens must be good for male fish, Guillette says. But the fertilization rates indicate that the opposite is true. Guillette says this...
NEW REPRODUCTIVE TECHNOLOGY.
; * The Canadian Fertility and Andrology Society (www.upmc.edu/isa/canada) released national data on in vitro fertilization rates. According to the society, last year 26% of 4,290 artificial reproduction procedures done at 17 of 20 Canadian infertility...
Oocyte cryopreservation now feasible, expert says: especially oncology patients.(News)
; ...the zona pellucida and cortical granules and increases fertilization rates. The first rime we tried ICSI, we had a birth, whereas...oocyte cryopreservation can achieve both survival and fertilization rates of around 70%. She is interested in tracking the health...
Nitrogen source and rate effects on the production of buffalograss forage grown with irrigation.(Forage & Grazing Lands)
; ...N [ha.sup.-1]. They found at low fertilization rates (34 kg N [ha.sup.-1]), the ratio...declined to about 8 kg or less at fertilization rates greater than or equal to 68 kg N...economically feasible and that higher fertilization rates could be used if an alternate source...
Nitrogen effects on grain yield and yield components of leafy and nonleafy maize genotypes. (Crop Ecology, Management & Quality).(Statistical Data Included)
; ...of this study was therefore to compare the effects of N fertilization rates on the yield and yield components of maize genotypes containing...experiment. The main plot treatments consisted of four N fertilization rates (0, 85, 170, and 255 kg N [ha.sup.-1]). The subplot treatments...
Ornithology: Songbirds' Fertile Stray Notes
; ...monogamous songbirds are enthusiastically adulterous, and sexual liaisons outside the home nest often produce much higher fertilization rates than couplings between mates. T.R. Birkhead and colleagues from Sheffield University in England went looking for the reason...
Preliminary economic analysis of poultry litter gasification option with a simple transportation model.(TECHNICAL PAPER)
; ...pounds of phosphate, and 40 pounds of potash. Recommended fertilization rates for most crops are 3-4 ton/acre/yr. This means that ~36...in close proximity to absorb the manure at recommended fertilization rates. Poultry manure, when used in excess or improperly applied...
Profitability of legume cover crops in the mid Atlantic region.
; ...profits at the few discrete fertilization rates used in agronomic experiments...only a limited number of fertilization rates. An approach better suited...acre. Data on yields and fertilization rates from all thre