Ticket #1094 (closed assessed: not an issue)

Opened 6 years ago

Last modified 6 years ago

Ecosim allocates fishing mortality from fishing effort wrongly

Reported by: martac Owned by:
Priority: normal Milestone: Ecopath 6: release 6.3 BETA
Component: Ecosim Version:
Severity: major Keywords:
Cc:

Description

In class last week, I used this lab from Villy where you have to import some data to Ecosim to force the model (3 Effort data by gear type). Se csv file here.

All goes well, and data is imported correctly, but when you look at fishing mortality for the species that are targeted by gear type forced with effort, you can see that fishing mortality is reversed regarding fishing effort: it seems that fishing mortality of gear 1 is applied to the species targeted by gear 2, and vice versa. I guess there is an error in locating fishing mortality from fishing effort.

Let me know if you find something wrong here.

Marta

Attachments

Lab3.pdf (125.0 KB) - added by martac 6 years ago.
data.csv (1.7 KB) - added by martac 6 years ago.
1094.png (107.9 KB) - added by jeroens 6 years ago.
Effort / mortality seems swapped?!

Change History

Changed 6 years ago by martac

Changed 6 years ago by martac

comment:1 Changed 6 years ago by jeroens

  • Status changed from new to closed
  • Resolution set to not an issue

The bug is sneaky but resides in the csv file. In this file the pool code for effort is wrong. In the Lab3 model, menhaden is group 3 while the fishing effort time series 'Men Effort' is targeting pool code 2 ('other prey')

Changed 6 years ago by jeroens

Effort / mortality seems swapped?!

comment:2 Changed 6 years ago by jeroens

  • Status changed from closed to reopened
  • Severity changed from NOT SET to major
  • Type changed from NOT SET to assessed
  • Component changed from NOT SET to Ecosim
  • Priority changed from NOT SET to normal
  • Resolution not an issue deleted

Correction, these indeed seems to be a bug. See attached png

comment:3 Changed 6 years ago by jeroens

  • Status changed from reopened to closed
  • Resolution set to not an issue

OK, figured it out. The landings in Ecopath were swapped: striped bass fleets were landing menhaden and vice-versa. This caused the apparent mix-up in fishing mortality.

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