... spawning Chinook salmon ARTs. Ovarian fluid and milt were collected to form a series of eight experimental blocks, each composed of ovarian fluid from a unique female and sperm from a unique pair of parasitic jack and guard hooknose males. Sperm from each ART were activated in river water and ovarian fluid...

... as far away as the Queen Charlotte Islands (∼850 km from the Fraser River) and during freshwater migration to the spawning grounds; for some populations this was a distance of over 700 km. Sockeye migrating in seawater toward the mouth of the Fraser River and upriver to spawning grounds showed a decline...

...Florence I. M. Thomas; Toby F. Bolton; Ann Marie Sastry ABSTRACT Many echinoderms spawn large numbers of eggs in rapid spawning bouts directly into the water column. During spawning, the eggs pass from the gonad along a narrow oviduct and through a rigid gonopore before reaching the water...

.... ( 1998 ). Small-scale mixing and transport in and above a coral reef during mass spawning . Eos Trans. Am. Geophys. Union (Suppl) . 79 , OS165 . Koehl , M. A. R. , Hunter , T. and Jed , J. ( 1991 ). How do body flexibility and length affect hydrodynamic forces on sessile...

...Florence I. M. Thomas; Toby F. Bolton ABSTRACT Shear stresses experienced by eggs in the oviduct of the echinoid Arbacia punctulata during spawning were calculated using engineering equations that describe laminar flow through pipes. Shear stresses in the oviduct ranged from 0 to 58.7 Pa. Two...

...Florence I. M. Thomas ABSTRACT Physical properties (density in kg m-3, viscosity, sinking rates and dispersion rate) of the gametes and associated spawned materials were measured for three species of sea urchin, Tripneustes gratilla, Echinometra mathaei and Colobocentrotus atratus , from habitats...

...A. A. Pacey; M. G. Bentley ABSTRACT Spawning of the lugworm Arenicola marina (L.) (Annelida: Polychaeta) occurs in both sexes following the release of a sex-specific maturation hormone from the prostomium. In males this has been termed sperm maturation factor (SMF). Chromatographic purification...