Coho salmon (Oncorhynchus kisutch) eggs were fertilized and fry were incubated at 10°C in the presence and absence of suspended iron. Suspended ferric hydroxide at a concentration of 3 ppm had no apparent effect on the hatchability, embryonic development, or survival and maturation of newly hatched coho salmon still attached to the yolk mass (alevins). OHIO J. SCI. 78(1): 34, 1978 The depositio...

Porous surface modified polyvinylidene ï‌‚uoride (PVDF) hollow fiber membranes are fabricated through a dry-wet phased inversion process. Surface modifying macromolecules (SMM) (1 wt. %) are used as additives in the spinning dope. The performance of the surface modified membrane in contactor application for CO2 stripping from water is assessed through the fabricated gas–liquid membrane contacto...

Quantifying spawning biomass of commercially relevant fish species is important to generate fishing quotas. This will mostly rely on the annual or daily production eggs. However, these have be identified precisely level obtain a reliable estimate offspring different species. Because morphological identification can very difficult, recent developments are heading towards application molecular to...

The effects of sewage effluent on the abundance, condition (length and reproduction) and mortality of hulafish Trachinops taeniatus were investigated at multiple outfall and control locations on the central coast of New South Wales, Australia. Underwater visual surveys found consistently fewer T. taeniatus at locations where sewage was discharged compared to control locations. The condition of ...

  This study involves the investigation of Tinca tinca (L., 1758) living in Kapulukaya Reservoir in Turkey. It was observed that the fish reach sexual maturity at the age of III and the breeding period starts in May and ends in July. The mean monthly gonadosomatic indices varied from 1.38 ±0.06 (in October) to 8.01±1.03 (in May). According to monthly variations of the GSI, spawning of the tench...

The effects of broiler breeder hen age and dietary n-3 oils on yolk n-3 and n-6 fatty acid composition, egg quality, fertility, and hatchability were investigated. A total of 2,200 eggs were collected from wk 26 through 62 from Cobb breeder hens fed diets containing 1.75% fish oil + 1.75% yellow grease (low n-3) or 3.5% fish oil (high n-3). Eggs obtained from a commercial source were used as th...

Netherlands report in the current issue of the Proceedings of the Royal Society B (published online) the first ever survey of freshly spawned fish eggs to cover the whole of the North Sea. The team highlight the former significance and current concern about cod stocks. “Rebuilding these stocks remains a key policy aim in Europe, the USA and Canada,” they argue. “Historically, the North Sea cont...

Eggs of the Eurasian perch, Perca fluviatilis, are strongly attached to each other to form 0.5-5.5m long and 1-6 cm wide floating jelly strands or ribbons. The processes involved in the initiation of egg attachment were investigated in the present study. Eggs are released together with small amounts of ovarian fluid. When the eggs come in contact with water, a fibrous jelly-like structure is fo...