Review of Recreational Fisheries Survey Methods (2006) / Chapter Skim
Currently Skimming:
4 Data Requirements for Population Assessment
4 Data Requirements for Population Assessment
Pages 83-92
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 83... ...
Commercial fisheries have been the main source of fisherydependent data used in developing quantitative population assessments; however, more and more often, data from recreational fisheries are relied on to complement data collected from other sources or as the sole source of information for some assessments. This increased demand on recreational fisheries data necessitates a discussion of the survey methods used in recreational fisheries and whether these methods provide data adequate for assessment purposes.
|
From page 84... ...
In recreational fisheries surveys, such as the Marine Recreational Fisheries Statistics Survey (MRFSS) , CPUE is obtained from individuals and is expanded by an estimate of effort across
|
From page 85... ...
To better address these issues, a closer look needs to be taken at effort and CPUE calculations as they are carried out in a recreational fisheries context. The other complicating issue is how catch and release influences the accuracy of total removals reported and the subsequent underestimation of fishing mortality.
|
From page 86... ...
defines three types of effort that can be calculated from the MRFSS data: target effort, catch effort, and directed effort. Population assessment scientists must be aware of the presence of these three different types of effort in the database and understand how they relate to the problem of estimating relative abundance.
|
From page 87... ...
data to restrict black rockfish data to only those locations where black rockfish had been caught in at least five separate locations. The latest assessment for red snapper (Gulf of Mexico Fishery Management Council, 2005a)
|
From page 88... ...
reports (Pacific Fishery Management Council, 2006) , the use of recreational catch rate data from CPFV logs or Recreational Fisheries Information Network (RecFIN)
|
From page 89... ...
These landings constituted 74 percent of the total landings of striped bass by the recreational and commercial fishery (Atlantic States Marine Fisheries Commission, 2004)
|
From page 90... ...
no Texas data after 1986, and (4) no head boat sampling after 1985 · The National Marine Fisheries Service's Beaufort Laboratory head boat survey for all states after 1985 · The Texas Parks and Wildlife Department's coastal sport fishing survey Recreational discards data are collected by the MRFSS in the Gulf of Mexico but are not available for Texas landings or for landings from head boats.
|
From page 91... ...
, and, starting in 2003, California Recreational Fisheries Survey (CRFS) samplers have measured length and weight of discarded fish from CPFVs and from onshore anglers.
|
From page 92... ...
Recall bias of released fish has been identified as an issue in recreational fisheries (Pollock et al., 1994) and shown to be significant for salmon fisheries in the Strait of Georgia (Diewert et al., 2005)
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.