Related items
Showing items related by metadata.
-
DocumentStock assessment for the goldstripe sardinella (Sardinella gibbosa) caught by purse seine from the Gulf of Suez and more southern Red Sea waters 1984
Also available in:
No results found.The UNDP/FAO Project for the Development of Fisheries in the Red Sea and Gulf of Aden RAB/83/028 (previously RAB/77/008 and RAB/81/002) commenced a joint biological study of the Gulf of Suez and Egyptian Red Sea fisheries during late 1979. Emphasis was directed towards the collection and analysis of data relevent to assessing the state of the fish stocks, and providing an improved basis for the management of the fisheries. This report contains the fifth of a series of stock assessments based on these data. It deals with the Goldstripe sardinella which is caught by purse seine principally from the Gulf of Suez, but also from more southern waters off the Egyptian Red Sea coast. During the study period the Goldstripe sardinella contributed up to 15% of the purse seine catches from the Gulf of Suez; and up to 20% of the catches from the more southern ground within and adjacent to Foul Bay. -
Book (stand-alone)Papers presented at the Symposium on Biology, Stock Assessment and Exploitation of Small Pelagic Fish Species in the African Great Lakes Region. Bujumbura (Burundi). 25-28 November 1992. 1993
Also available in:
No results found.This document contains the papers presented at the Symposium on Biology, Stock Assessment and Exploitation of Small Pelagic Fish Species in the African Great Lakes Region. The symposium, jointly organized by the FINNIDA/FAO/AGFUND project Research for the management of fisheries on Lake Tanganyika (LTR) and the FAO/UNDP project Inland Fisheries Planning, Development and Management in Eastern/Central/Southern Africa (IFIP), was held in Bujumbura, Burundi from 25 to 28 November 1992. The Lakes a nd Reservoirs included in the 20 Symposium papers are Itezhi-Tezhi, Mweru-Luapula, Malawi, Kariba, Kibu, Tanganyika and Victoria. The small pelagic species treated are Limnothrissa miodon, Stolothrissa tanganicae, Rastrineobola argentea, Poecilothrissa moeruensis and Engraulicypris sardella. The topics covered include biology, life history, growth and mortality and various aspects of the fisheries.Small body size is a feature of Limnothrissa miodon in the man-made Lakes Kariba and Cahora Bassa. Recent reliable determinations of their growth confirm the earlier very high estimates of their mortality. These high mortality rates are consistent with the small body size of the fish. A similar allometric relationship applies to the production/biomass ratios. Because most fish die after a few months there is no relationship between fishing effort and catch. Regulating effort may therefore contribute little to the management of this stock. The greatest risk to the fishery is a collapse of recr uitment and there is an urgent need to understand the factors that regulate reproduction. -
DocumentStock assessment for the rock lobster Panulirus homarus inhabiting the coastal waters of the People's Democratic Republic of Yemen 1984
Also available in:
No results found.The report provides an assessment based principally on the sampling of catches at the Mukalla Cold Store and associated landing sites during the three seasons from and including 1980/81. Cohort identities were established using the method of Bhattacharya. Spawning was concluded as occurring twice each year; in the month prior to February and again sometime between May and October. Yield per recruit analyses indicated that modest increases in annual catch would result from increasing the fishing mortality coefficient. To the extent of 6% more catch if the fishing mortality coefficient was increased by 25%; and 13% if the latter was increased by 67%. It was suggested that management action to seek these increases in annual catch might not be justified, particularly if associated with the introduction of substantial additional costs. In respect to the adjacent: fisheries for lobster, that: associated with the Thabut Cold Store was considered near to being fully exploited, while substantia l additional catch was suggested as possible from the fishery at Socotra.
Users also downloaded
Showing related downloaded files
No results found.