FAQ FAQ  Forum Search   Events   Register Register  Login Login

Are bull sharks endangered or threatened?

 Post Reply Post Reply
Author
todobien View Drop Down
Pro
Pro


Joined: 26 January 2006
Status: Offline
Points: 4091
Post Options Post Options   Thanks (0) Thanks(0)   Quote todobien Quote  Post ReplyReply Direct Link To This Post Topic: Are bull sharks endangered or threatened?
    Posted: 20 April 2018 at 11:50am
Because it'd bring chaos into the fisheries management world if it was accepted. I wonder if the MFC scientist would be willing to take a look at it and see if it looks solid enough for the MFC to discuss and if warranted vote on whether to send to DMF to review and comment upon?????
Back to Top
todobien View Drop Down
Pro
Pro


Joined: 26 January 2006
Status: Offline
Points: 4091
Post Options Post Options   Thanks (0) Thanks(0)   Quote todobien Quote  Post ReplyReply Direct Link To This Post Posted: 20 April 2018 at 11:47am
Because they said so that's why
Back to Top
Rick View Drop Down
Pro
Pro


Joined: 16 July 2003
Location: United States
Status: Online
Points: 5727
Post Options Post Options   Thanks (0) Thanks(0)   Quote Rick Quote  Post ReplyReply Direct Link To This Post Posted: 20 April 2018 at 9:09am
Originally posted by todobien todobien wrote:

Looks like they are utilizing DMFs data and it is being accepted. Too bad DMF wouldn't accept your analysis of their data.


Angry  Exactly

Paramore used-

Capture Rates from the- "independent gillnet survey conducted by the North Carolina Division of Marine Fisheries (NCDMF) from 2003–2011, but were present every year from 2011–2016"

Temperature Data  from "evidence for increasing water temperatures in Pamlico Sound was found in a 45-year data set for the NCDMF estuarine trawl survey"

This statement from the shark study certainly supports my weakfish nursery area work based on similar analysis of abiotic variables that attract juvenile weakfish to the deeper more open areas of the sound.

The high catch area model was selected for use predicting CPUE (Whole sound model AICc = 445.78, high catch area model AICc = 412.57). Plots of juvenile Bull Shark CPUE against significant environmental variables suggested positive associations with temperatures greater than 22 °C and salinities between 10 and 25 ppt (Supplementary Fig. S2).

If Paramore can designate this broad polygon as the high catch area for juvenile Bull Sharks based his analysis of the Division's gillnet survey data

Figure 2


please explain why CPUE analysis using the Division's P195 Trawl Survey data doesn't support naming the deeper more open areas of the Pamlico Sound as weakfish primary nursery areas-


...and data certainly shows that the Division allows trawling in these undesignated primary nursery areas









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
todobien View Drop Down
Pro
Pro


Joined: 26 January 2006
Status: Offline
Points: 4091
Post Options Post Options   Thanks (0) Thanks(0)   Quote todobien Quote  Post ReplyReply Direct Link To This Post Posted: 20 April 2018 at 8:11am
Looks like they are utilizing DMFs data and it is being accepted. Too bad DMF wouldn't accept your analysis of their data.
Back to Top
Rick View Drop Down
Pro
Pro


Joined: 16 July 2003
Location: United States
Status: Online
Points: 5727
Post Options Post Options   Thanks (0) Thanks(0)   Quote Rick Quote  Post ReplyReply Direct Link To This Post Posted: 19 April 2018 at 4:02pm
...a possible reason the bulls are showing up in greater quantities (they've always been there) is because the forge base feeding them is shrinking.   Bycatch from trawling in the Pamlico is an attractant as the live forage base shrinks elsewhere.

...same goes for the sharks on the beach and the growing number of interactions with swimmers.


Edited by Rick - 19 April 2018 at 5:40pm
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
chriselk View Drop Down
Pro
Pro
Avatar

Joined: 22 November 2004
Location: United States
Status: Offline
Points: 3427
Post Options Post Options   Thanks (0) Thanks(0)   Quote chriselk Quote  Post ReplyReply Direct Link To This Post Posted: 18 April 2018 at 7:44am
https://en.wikipedia.org/wiki/Nature_(journal)


The above comments are my personal opinion and do not represent those of any organizations or agencies I may be a member of.
Back to Top
kshivar View Drop Down
Pro
Pro
Avatar

Joined: 01 November 2004
Location: North Carolina
Status: Offline
Points: 713
Post Options Post Options   Thanks (0) Thanks(0)   Quote kshivar Quote  Post ReplyReply Direct Link To This Post Posted: 17 April 2018 at 10:05am
Breadman that’s funny and sad at the same time. So true.
Back to Top
Bread Man 1 View Drop Down
Pro
Pro
Avatar

Joined: 12 May 2013
Location: Sneads Ferry
Status: Offline
Points: 1403
Post Options Post Options   Thanks (0) Thanks(0)   Quote Bread Man 1 Quote  Post ReplyReply Direct Link To This Post Posted: 17 April 2018 at 9:33am
And let's not forget that for years some DMF staff couldn't identify our 3 species of flounder. Who's to say they know what shark they are looking at?
Back to Top
Rick View Drop Down
Pro
Pro


Joined: 16 July 2003
Location: United States
Status: Online
Points: 5727
Post Options Post Options   Thanks (0) Thanks(0)   Quote Rick Quote  Post ReplyReply Direct Link To This Post Posted: 17 April 2018 at 8:53am
link to the scientific paper-


Increased Abundance and Nursery Habitat Use of the Bull Shark (Carcharhinus leucas) in Response to a Changing Environment in a Warm-Temperate Estuary

  • […]
  • - Show fewer authors
Received:
Accepted:
Published online: 


Edited by Rick - 17 April 2018 at 8:58am
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
Ray Brown View Drop Down
Pro
Pro
Avatar
NCW FOUNDER

Joined: 14 July 2003
Location: North Carolina
Status: Offline
Points: 14706
Post Options Post Options   Thanks (0) Thanks(0)   Quote Ray Brown Quote  Post ReplyReply Direct Link To This Post Posted: 16 April 2018 at 10:37pm
According to the article the science was developed by the DMF. But that is consistent with our history. The regulatory wing of the DMF often disagrees or ignores the findings of DMF scientists. Been doing it for years.

In order to avoid trawling in a nursery you must ignore the life cycle of a bull shark in the same way we have ignored those of spot, croaker, and gray trout. If you ignore that reality then in your reality you aren't in a nursery.

Historically known in NC as a "Purvis Point of Reference". The key to managing Pamlico Sound like you wish regardless of the known science. To his credit Connell Purvis told us all that is how the DMF values Pamlico sound. It is there to provide shrimp and anything else it gives up is a bonus and you manage for that at the expense of anything else, known or unknown.

This, my friend is the DMF legacy that has molded the Pamlico sound of today. It is not the Pamlico sound that Director Purvis inherited, but it is the one that he, and the hirees he made that are still with us, created, and now protect as is.

It is all it can be, until we choose to manage for what Pamlico sound once was and stop managing for the preservation of what the nets and trawls have created. The difference between now and then IS the "Purvis Point of Reference." A planned and achieved state of existence to benefit the NC shrimper. All hail the King!

Edited by Ray Brown - 16 April 2018 at 11:12pm
Shrimp trawling never stops in Pamlico Sound. It just pauses on the weekend so crabs can remove the dead and dying from the battlefield.
Back to Top
bakesta View Drop Down
Pro
Pro
Avatar

Joined: 24 January 2005
Location: United States
Status: Offline
Points: 2545
Post Options Post Options   Thanks (0) Thanks(0)   Quote bakesta Quote  Post ReplyReply Direct Link To This Post Posted: 16 April 2018 at 10:19pm
The manuscript was obviously not reviewed by the DMF or NCFA.  Therefore, it is not permitted to claim that the Pamlico Sound is a nursery area for anything.   

DMF scientists/directors have long said that extrapolations like that are just not permitted in marine fisheries management.  How dare those authors call our pamlico sound a nursery area!  


And didn't the republicans of NC outlaw the term global warming?


This paper just offends at every level (if you are an idiot).






 
"Do the right thing. It will gratify some people and astonish the rest." --- Mark Twain
Back to Top
Bread Man 1 View Drop Down
Pro
Pro
Avatar

Joined: 12 May 2013
Location: Sneads Ferry
Status: Offline
Points: 1403
Post Options Post Options   Thanks (0) Thanks(0)   Quote Bread Man 1 Quote  Post ReplyReply Direct Link To This Post Posted: 16 April 2018 at 10:08pm
Bunch of garbage in that article if you ask me. The "experts" claiming that bull sharks are a new occurrence in Pamlico Sound is laughable at best.

Edited by Bread Man 1 - 16 April 2018 at 10:09pm
Back to Top
Ray Brown View Drop Down
Pro
Pro
Avatar
NCW FOUNDER

Joined: 14 July 2003
Location: North Carolina
Status: Offline
Points: 14706
Post Options Post Options   Thanks (0) Thanks(0)   Quote Ray Brown Quote  Post ReplyReply Direct Link To This Post Posted: 16 April 2018 at 8:43pm
May need another ITP if so.

Bulls of the Pamlico!
Shrimp trawling never stops in Pamlico Sound. It just pauses on the weekend so crabs can remove the dead and dying from the battlefield.
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 0.156 seconds.