[Coral-List] Natural Predation and Lionfish
Steve Mussman
sealab at earthlink.net
Mon Apr 21 16:06:55 EDT 2014
Another example of natural balances being thrown off by careless human
intervention. We agree that it would be nice if natural predators could help
reef managers control an invasive species, but conditioning increasingly
scarce numbers of potential predators to do so raises a number of ethical
questions. As for our industry (I assume you mean diving) working hard to
move away from fish feeding .. . . I have to take issue with that. Case in
point is Stingray City and if anything, the diving industry now condones and
extols the shark feeding concept. Both shark feeding and feeding lionfish to
predators is being promoted as a way to advance conservation efforts, but
are they really serving the best interests of the species involved?
Shouldn't our industry react with more consistency when addressing both
these (feeding) issues? It is hard for me to envision a Nassau grouper
being more rambunctious or conceivably more unsafe than a tiger shark being
fed no matter what the methods. Seems to me that the goal should be to
protect them both in a natural and wild setting. Steve
-----Original Message-----
From: Lad Akins
Sent: Apr 21, 2014 11:42 AM
To: 'Steve Mussman' , coral-list at coral.aoml.noaa.gov
Subject: RE: [Coral-List] Natural Predation and Lionfish
HI Steve,
I agree that if predators could help divers then we would be achieving a
higher level of control. The problem is that these predators are hindering
divers â even to the point of injury and cessation of removal efforts at
sites where the predators have become too rambunctious. Not sure what point
tethering really proves. If someone wanted to document the effect of
conditioned predators, simply curtailing culling at these sites in Cayman to
see what effect the predators have would answer the question. Barring that,
we see from Hacekrott, Valdivia and others that top predators are not going
to be the answer.
What bothers me most, is that conditioning of predators (fishfeeding) is
something we, as an industry, have worked hard to move away from, not
withstanding a few well-organized and controlled programs. Now, all of a
sudden, in the name of lionfish control, some divers are right back at it,
often in an uncontrolled, uncoordinated manner. It is creating seriously
unsafe conditions and the interpretations of the tethering results are
adding fuel to that fire.
Lad
**************************
Lad Akins
Director of Special Projects
REEF
P O Box 370246
98300 Overseas Hwy
Key Largo FL 33037
(305) 852-0030 w
(305) 942-7333 c
www.REEF.org
Lad at REEF.org
[1]FB2
From: Steve Mussman [mailto:sealab at earthlink.net]
Sent: Monday, April 21, 2014 11:10 AM
To: Lad at reef.org; coral-list at coral.aoml.noaa.gov
Subject: RE: [Coral-List] Natural Predation and Lionfish
Hi Lad,
I am familiar with the papers you referenced and I agree that it is likely
there is no single factor which can control the lionfish invasion. What is
interesting to me is that the research carried out on the reefs surrounding
Little Cayman seems to dispel the belief that grouper and other
predators won't consume live lionfish. That reinforces my perspective based
on anecdotal evidence provided by discussions I've had with a number of
professional divers throughout the Caribbean region.The researchers were not
suggesting that natural predation was a catch-all solution, but that perhaps
it could be a contributing factor in efforts to control. In fact they seemed
to suggest that these "natural" lionfish predators might benefit from some
rather intensive training. Feeding on tethered lionfish is not the same as
flushing them out of their hiding spots, but it does prove a point. I just
returned from Bonaire where I found lionfish on every dive. They were a lot
more prevalent than predatory grouper. Looks like we need all the help we
can get to reverse these trends.
Regards,
Steve
-----Original Message-----
>From: Lad Akins
>Sent: Apr 21, 2014 7:00 AM
>To: 'Steve Mussman' , [2]coral-list at coral..aoml.noaa.gov
>Subject: RE: [Coral-List] Natural Predation and Lionfish
>
>Hi Steve,
>
>Have you seen the PLoS One paper by Hackerott et al and the more recent
Peer
>J by Valdivia et all looking at lionfish populations in relation to
predator
>populations?
>
>[3]http://www.plosone.org/article/info:doi/10.1371/journal.pone.0068259
>
>
>[4]https://peerj.com/articles/348/
>
>
>Doesn't look like large predators will be the ones doing the control. Many
>guess that other factors like parasites, competition, possible reproduction
>differences and/or predation on eggs/larvae help keep them in balance in
the
>native range. There are many pressures in a marine ecosystem and it is rare
>that control of anything is restricted to a single or few factors. Checks
>and balances are more like a web than a single rope.
>
>All the best,
>
>Lad
>
>**************************
>Lad Akins
>Director of Special Projects
>REEF
>P O Box 370246
>98300 Overseas Hwy
>Key Largo FL 33037
>(305) 852-0030 w
>(305) 942-7333 c
>[5]www.REEF.org
>[6]Lad at REEF.org
>
>
>-----Original Message-----
>From: [7]coral-list-bounces at coral.aoml.noaa.gov
>[[8]mailto:coral-list-bounces at coral.aoml.noaa.gov] On Behalf Of Steve
Mussman
>Sent: Saturday, April 19, 2014 4:18 AM
>To: [9]coral-list at coral.aoml.noaa.gov
>Subject: [Coral-List] Natural Predation and Lionfish
>
>
> The study mentioned in this article may be of interest to some.
>
>
>
>[1][10]http://www.compasscayman.com/caycompass/2014/04/16/Sharks,-grouper-l
earn-
> to-prey-on-lionfish/
>
>
> Makes me wonder at least what might happen if healthy populations of
>grouper
> and other potential lionfish predators were readily available.
>
>
> Steve
>
>References
>
> 1.
>[11]http://www.compasscayman.com/caycompass/2014/04/16/Sharks,-grouper-lear
n-to-
>prey-on-lionfish/
>_______________________________________________
>Coral-List mailing list
>[12]Coral-List at coral.aoml.noaa.gov
>[13]http://coral.aoml.noaa.gov/mailman/listinfo/coral-list
>
References
1. https://www.facebook.com/pages/REEF-Invasive-Lionfish-Program/124810934235590
2. mailto:coral-list at coral.aoml.noaa.gov
3. http://www.plosone..org/article/info:doi/10.1371/journal.pone.0068259
4. https://peerj.com/articles/348/
5. http://www.REEF.org/
6. mailto:Lad at REEF.org
7. mailto:coral-list-bounces at coral.aoml.noaa.gov
8. mailto:coral-list-bounces at coral.aoml.noaa.gov
9. mailto:coral-list at coral.aoml.noaa.gov
10. http://www.compasscayman.com/caycompass/2014/04/16/Sharks,-grouper-learn-
11. http://www.compasscayman.com/caycompass/2014/04/16/Sharks,-grouper-learn-to-
12. mailto:Coral-List at coral.aoml.noaa.gov
13. http://coral.aoml.noaa.gov/mailman/listinfo/coral-list
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