Navigation Links
New study examines the effects of catch-and-release fishing on sharks
Date:1/30/2014

MIAMI (Jan. 29, 2014) A new study led by scientists at the University of Miami (UM) Abess Center for Ecosystem Science and Policy and the Rosenstiel School of Marine and Atmospheric Science investigated how several species of coastal sharks respond to stress from catch-and-release fishing. The results revealed that each of the shark species responded differently. Hammerhead sharks were by far the most vulnerable to fighting on a fishing line.

The UM scientists experimentally simulated catch-and-release fishing on five shark species hammerhead, blacktip, bull, lemon and tiger sharks in South Florida and Bahamian waters. Researchers took blood samples to examine stress, including pH, carbon dioxide and lactate levels, conducted reflex tests, as well as used satellite tags to look at their post-release survival. Fighting on a fishing line significantly affected the blood lactate levels of sharks, similar to what happens to humans during intense or exhaustive physical exercise, which has been linked to mortality in many species of fish. The study revealed that even with minimal degrees of fighting on a fishing line, hammerhead exhibited the highest levels of lactic acid build of all species studied, followed by blacktip, bull, lemon and tiger sharks. Tagging results also suggested that, after release, hammerheads were also prone to delayed mortality.

"Our results show that while some species, like tiger sharks, can sustain and even recover from minimal catch and release fishing, other sharks, such as hammerheads are more sensitive" said lead author and Abess Center Ph.D candidate Austin Gallagher. "Our study also revealed that just because a shark swims away after it is released, doesn't mean that it will survive the encounter. This has serious conservation implications because those fragile species might need to be managed separately, especially if we are striving for sustainability in catch and release fishing and even in bycatch scenarios."

Adds study co-author Dr. Neil Hammerschlag, a Research Assistant Professor at UM, "Many shark populations globally are declining due to overfishing. Shark anglers are some of the biggest advocates for shark conservation. Most have been making the switch from catch and kill to all catch and release. Our study helps concerned fisherman make informed decisions on which sharks make good candidates for catch and release fishing, and which do not, such as hammerheads."


'/>"/>

Contact: Diana Udel
dudel@rsmas.miami.edu
786-256-4446
University of Miami Rosenstiel School of Marine & Atmospheric Science
Source:Eurekalert  

Related biology news :

1. Study by UC Santa Barbara researchers suggests that bacteria communicate by touch
2. Law that regulates shark fishery is too liberal: UBC study
3. New study will help protect vulnerable birds from impacts of climate change
4. Study jointly led by UCSB researcher supports theory of extraterrestrial impact
5. BYU study: Using a gun in bear encounters doesnt make you safer
6. 15-year study: When it comes to creating wetlands, Mother Nature is in charge
7. Pycnogenol (French maritime pine bark extract) shown to improve menopause symptoms in new study
8. Crystal structure of archael chromatin clarified in new study
9. EU-funded study underlines importance of Congo Basin for global climate and biodiversity
10. University of Houston study shows BP oil spill hurt marshes, but recovery possible
11. Study demonstrates cells can acquire new functions through transcriptional regulatory network
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
New study examines the effects of catch-and-release fishing on sharks
(Date:7/2/2020)... ... July 02, 2020 , ... ... has announced a publication detailing the use of its revolutionary NEXTGENPCR endpoint ... reaction (RT-PCR) in 16 minutes. The article, titled "Ultra-fast one-step RT-PCR protocol ...
(Date:6/28/2020)... ... June 25, 2020 , ... ... software solutions for biopharmaceutical R&D, today announced that it has entered into ... full-length multispecific antibodies (Multiclonics®), to support their translational and clinical research strategy ...
(Date:6/23/2020)... FREDERICK, Md. (PRWEB) , ... ... ... a leading provider of gene-to-protein and monoclonal antibody development services, today announced ... of protein-based products and services to the pharmaceutical, diagnostics, and research industries. ...
Breaking Biology News(10 mins):
(Date:8/12/2020)... ... August 11, 2020 , ... ... firm, is making available for free its new white paper – Simulated ... simulation testing into today’s biologics licensing application (BLA). In response, Modality Solutions ...
(Date:7/31/2020)... Ariz. (PRWEB) , ... July 29, 2020 , ... R3 ... joint injections for only $3950. With 50 million stem cells total, patients may choose ... stem cell therapy works for arthritic joints (BMC Musculoskelet Disord. 2016). At R3 International, ...
(Date:7/31/2020)... ... July 29, 2020 , ... eSource has long been touted as the solution ... history of eSource, the reasons it did not take off as quickly as people ... the industry is moving towards capturing data electronically for clinical trials and then repurposing ...
(Date:7/18/2020)... ... 16, 2020 , ... “We are thrilled to deliver this new technology to ... of its kind on the market and we were pleased that the IFT jury ... traditional cultured ingredients, creating a natural way to extend the shelf life and improve ...
Breaking Biology Technology: