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Now showing items 81-90 of 143
Production economics of Nile Tilapia (Oreochromis niloticus) pond culture in El-Fayum Governorate, Egypt
Type: Journal Article
Econometric techniques were used to estimate a production function for tilapia pond culture in El-Fayum Governorate, Egypt, utilizing cross-sectional field data. Explanatory variables were feed, initial stocking weight, ...
An approach to estimate the natural mortality rate in fish stocks
Type: Journal Article
A simple approach is introduced to estimate the natural mortality rate (M) of fish stocks. The approach is based on the age at maximum cohort biomass, or critical length (L*) concept. The ratio of the critical length to ...
Beverton and Holt equations: spreadsheet functions and uncertainty
Type: Journal Article
This contribution illustrates how modern spreadsheets aid the calculation and visualization of yield models and how the effects of uncertainties may be incorporated using Monte Carlo simulation. It is argued that analogous ...
Reviving the Macrobrachium rosenbergii (de Man) fishery in Vembanad Lake, India
Type: Journal Article
In Vembanad Lake and its confluent rivers (Kerala, India), the catches of Macrobrachium rosenbergii (de Man) were reported to have dwindled to a mere 39 t in the 1980s from average landings of 300 t during the 1960s. This ...
Application of length-based stock assessments to Kuwait's fish stocks
Type: Journal Article
This article examines the suitability of length-based methods for providing regular assessments of the stocks of the more important commercial fish species in Kuwait. To date, comparisons of age-based and length-based methods ...
Multi species assessment of fish stocks off the western Sahara region with emphasis on the family sparidae
Type: Journal Article
The Western Sahara region (21-26 N) is well known for its intense upwelling and good fishing grounds. A large International fleet is operating in the area and the main target species are cephalopods.
Production performance of white fish in two different culture systems in Patuakhali, Bangladesh
Type: Journal Article
The present study was carried out to compare the production performance of white fish from traditional and modified traditional culture system in Patuakhali with the following objectives: 1) To know the production performance ...
On the use of visual survey methods for estimating reef fish standing stocks
Type: Journal Article
The use of visual surveys as a means of estimating fish standing stocks is discussed with respect to reef fish. Difficulties associated with this technique are noted. Visual survey methods are relatively cheap, non-destructive, ...
Preservation of genetic diversity in restocking of the sea cucumber Holothuria scabra investigated by allozyme electrophoresis
Type: Journal Article
Population genetics analyses should be considered when releasing hatchery-produced juveniles of the sea cucumber Holothuria scabra when spawners from nonlocal populations are used. In New Caledonia, within-region genetic ...
Length-weight relationship of fishes and cephalopods from the Balearic Islands (Western Mediterranean)
Type: Journal Article
Length-weight relationship (LWR) parameters of 72 species of fishes and 15 species of cephalopods caught in the Balearic Islands demersal fishery are reported. This is the first compilation of LWR for these groups in the ...