Creel survey fish sampling and morphometric analysis (Salmonidae)

Knowledge graph centered on Creel survey fish sampling and morphometric analysis (Salmonidae) with 25 nodes and 97 connections. Top connected: Salmo trutta, Brown Trout, Oncorhynchus mykiss, Rainbow Trout, Oncorhynchus mykiss gairdnerii.

Method synopsis

Fish captured by sport anglers during creel surveys are measured for weight and length, then analyzed using improved weight-length relationships and relative weight calculations to assess fish condition.

Synthesized from method descriptions across 1 paper using this protocol.

Procedure from a recent peer-reviewed implementation

Steps below were extracted from the most recent peer-reviewed implementation of this protocol in the corpus — Relative Weight of Brown Trout and Lake Trout in Blue Mesa Reservoir, Colorado (2014), Aquatic Science and Technology. Implementations in other papers (listed below) may differ.

1. Fish capture during creel surveys
   Lake trout and brown trout were caught by sport anglers at the reservoir's boat ramps during creel surveys conducted in spring and summer 2011.
   Quantities: 100 brown trout ranging from 260 to 432 mm length, 17 lake trout ranging from 387 to 689 mm lengthDuration: Spring and summer 2011Conditions: At Blue Mesa Reservoir boat ramps during angling activities
   Equipment: sport fishing gear used by anglers
2. Fish measurement
   Each captured fish was weighed and measured for total length with specific accuracy requirements.
   Quantities: Weight measured to +/- 2.3 grams accuracy, total length measured to +/- 3 mm accuracyDuration: During each creel survey encounterConditions: At boat ramps during survey periods
   Equipment: weighing scale, measuring device for length
3. Weight-length relationship modeling
   Applied the improved weight-length model W(L)=1000(L/L1)^b where L represents total length in mm and W is weight in grams, using least squares regression to determine best fit parameters.
   Quantities: Model fitted to 100 brown trout data pointsDuration: Post-collection analysis

Typical Equipment

• sport fishing gear used by anglers
• weighing scale
• measuring device for length
• statistical analysis software

Output Measurements

• fish weight
• fish total length
• relative weight
• weight-length relationship parameters

Papers Using This Protocol (1)

Species Studied With This Protocol