FAQ FAQ  Forum Search   Events   Register Register  Login Login

2017 P195 Data is Available-

 Post Reply Post Reply
Author
Rick View Drop Down
Pro
Pro


Joined: 16 July 2003
Location: United States
Status: Offline
Points: 5852
Post Options Post Options   Thanks (0) Thanks(0)   Quote Rick Quote  Post ReplyReply Direct Link To This Post Topic: 2017 P195 Data is Available-
    Posted: 09 October 2018 at 9:49am

People need to understand why our fisheries are declining and in some cases depleted.  Information is power...but only if it is used.  

P195 data for 2017 is now available-

When people talk about poor Spot, Croaker and Gray Trout fisheries, they need to understand the level of discards in the Southeast shrimp trawl fisheries.  For NC the vast majority of those discards come from the Pamlico Sound, a well documented nursery area for all three species- a nursery area suppling more than NC with fish.

The NCDMF conducts the P195 trawl survey twice a year- once in June and once in Sept.  


The P-195 is a stratified random designed trawl survey.  The survey samples 52-54 stations within the total 1,502 grid stations- each grid is one square nautical mile.  P195 data is used to establish the annual JUVENILE Abundance Index for multiple species.  Depending on the species- biologists may use the June data or the Sept data.  I have a particular interest in Weakfish (gray trout), which uses the September data.  

For 2017 here are the stratified random stations that were sampled-

June


September

For Spot here are the results of the two P-195 2017 surveys- June and Sept.

June


September
Show in the chart below from the June 2017 survey are the top 15 landed species.  As you can see by the number of fish per pound, these are juveniles.  These 15 species represent the top 74% of all species landed by weight in the survey.


Here is similar data for the September 2017 survey.  These 20 species represent 92% of the species landed by weight.



You can see in the fish/pound and pounds/fish data that these are juvenile fish.  Spot and croaker size ranged from 20 to 27 individual fish per pound.


In 2017, below shows where the P-195 trawl survey found juveniles for-

Atlantic Croaker



Weakfish (Gray Trout)


Summer Flounder


Blue Crab


Southern Kingfish (Sea Mullet, Whiting)


Let's use Global Fishing Watch to look at a segment of 2017 shrimp trawl Effort in the Pamlico Sound.

Keep in mind that GFW uses an algorithm to track "fishing activity".   Each dot is a single plot in a fishing track, but the dots can be well spaced out.  You don't see a track line (Fishing Effort) until you click on a dot.  You'll see below.

The photos below ONLY represent effort by vessels >65-feet that were actively transmitting under federal rules for AIS/MMSI requirements-

May


May and June

May+June+July



May+June+July+August

May+June+July+Aug+Sept

May+June+July+Aug+Sept+Oct

June+July+Aug+Sept+Oct+Nov (May dropped)


November 2017 Only Effort

...and the boats had moved out of the Pamlico to the beach in December (Dec-17 and Jan-18)




There is no doubt in my mind that trawling in the critical juvenile habitat for many of our important finfish species (spot, croaker, weakfish (gray trout), southern flounder, summer flounder) and blue crab is affecting recruitment that has resulted in on-going decline and depletion.







Edited by Rick - 10 October 2018 at 7:21am
fiogf49gjkf0d
NC Fisheries Management- Motto: Too Little, Too Late, Too Bad   Slogan: Shrimp On! Mission Statement: Enable Commercial Fishing At Any and All Cost, Regardless of Impact to the Resource.
Back to Top
bakesta View Drop Down
Pro
Pro
Avatar

Joined: 24 January 2005
Location: United States
Status: Offline
Points: 2567
Post Options Post Options   Thanks (0) Thanks(0)   Quote bakesta Quote  Post ReplyReply Direct Link To This Post Posted: 09 October 2018 at 12:07pm
WOW!!!!!   That's nice work Rick.   It's all very clear. 



DMF has already given a response.


Image result for ostrich head in sand


Edited by bakesta - 09 October 2018 at 12:08pm
"Do the right thing. It will gratify some people and astonish the rest." --- Mark Twain
Back to Top
BrackishWater View Drop Down
Pro
Pro


Joined: 18 December 2014
Location: Pamlico River
Status: Offline
Points: 486
Post Options Post Options   Thanks (0) Thanks(0)   Quote BrackishWater Quote  Post ReplyReply Direct Link To This Post Posted: 09 October 2018 at 2:43pm
Wow is right. They are just slaughtering juvenile fish as they "clear-cut" the sound.
A rising tide lifts all boats...
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 10.11
Copyright ©2001-2012 Web Wiz Ltd.

This page was generated in 0.141 seconds.