The Catch Reporting Model

Catch data can be recorded at a high resolution on a fish by fish basis, when required and/or in set, day or trip summarised form. Catches can be recorded at very basic levels or in detail i.e. unlimited number of species, products, grades, storage and packing methods. It can also record vast amounts of environmental, biological and operational information. Olfish separates catch recording into the following categories: Processed catch Estimated catch Un-landed catch Biological sampling (size structure) Click on an image below to enlarge


	Processed Catch Catch that was processed onboard a factory vessel is referred to as processed catch. Processed catch can be recorded onboard the vessel, using the Onboard catch component, or onshore, using the Onshore catch component. A caught species is cut into various parts e.g. Gutted or Tails. This cut state of the catch is referred to as its product. Products are graded to reflect its size and quality after which they are packed into a bin.			Estimated Catch The estimated catch information is recorded by skippers aboard the vessel and is an estimate based on the skipper’s experience. The following information is recorded for estimate catch: Species: Indicating the species that was caught. Grade: The grade of the caught species. Green weight: An estimate of the weight of the caught species. Jurisdiction information (optional): This information comprised of a species quota area, a fishing management area and an EEZ.
	Un-landed Catch Some catch or parts thereof never reach the processing stage because of reasons like: a portion of the fish was eaten aboard the vessel. The fate of these fish is recorded as un-landed catch. The following information is recorded for un-landed catches: species product product weight fate (discarded, eaten, and escaped) reason (for example undersized or unmarketable), and jurisdiction information.			Biological sampling (Size structure) Sampling is the process of counting and measuring marine species. Sampling directly contributes to the conservation of sustainable fisheries. The population counts of fish species are constantly changing. Some factors that affect the fish stock are the number of vessels fishing, how many fish they catch, the number of fish produced by spawning, and the number lost through natural mortality. Fishery scientists predict how much fish is in the ocean by analyzing data from many different sources. Sampling is one method of collecting some of this data.

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OLFISH - Steenberg Office Park, Silvermine House, Tokai, Cape Town, 7945,
Cape Town, Republic of South Africa
Tel: +27 21 702 4111, fax: +27 21 702 4333
Email: olfish@olrac.com