Acronym SURVIVAL
Category
Fisheries
Title The effects of reduced salinities on growth rate, feed conversion and biology of... Programme National Programme
Instrument (FP6)
Contact Type (FP7)
Strand (Interreg)
NA
Theme (FP7)
Activity Area (FP6)
Regional Area (Interreg)
Action (COST)
NA
Specific Programme (FP7)
NA
Funding source National Coordinator Aida Campos Coordinator email acampos@ipma.pt
Coordinator institution
IPMA - Portuguese Institute for Sea and Atmosphere (Portugal)
Institutions involved
NA
Start year 2007 End year 2008 Funding (€) € 93,357 Website NA Summary The survival of Nephrops escaping from standard and square mesh codends was investigated onboard a commercial trawler. Test and control individuals were assigned a degree of vitality, examined for physical damages and sampled for physiological stress at arrival on deck, placement into sea cages and cage haul-up. Survival at the end of the study was modelled as a function of environmental, biological and operational parameters.
Goals:
(1) To assess survival rates of Norway lobster (Nephrops norvegicus) escaping from standard cod-ends 70 mm diamond mesh size and modified ones made in 55 mm square mesh, during summer and winter conditions Evaluation of Nephrops survival rates escaping through standard 70mm mesh size cod-ends Comparison with survival rates for (a) control individuals caught with traps; (b) individuals escaping from the same trawls equipped 55mm square mesh selective codends; (c) those retained in the codend; (2) Evaluation of seasonal effect and size-dependency on survival; (3) Quantification of blood stress indicators (ammonia, lactate, glucoses) in the different situations in 1). The main objective of the present study was: (1) To investigate the interrelationships between survival and the experimental variables; (2) To identify the main stressors determining potential mortality during the commercial fishing operation.
Keywords
Crustacean;
Shellfish;
Fishing technology;
Trawling;
Crustacean fisheries;
Gear technology;
Lobster;
Traps;
Gear selectivity;
Marine Region
38
Portuguese Waters (27.IXa,27.IXb)
52
Northern Alboran Sea (GSA 1)
2
Marine Region Map
