Subscription Services: Subscribe | Change | Unsubscribe | RSS
Advertising Media Kit: Introduction | Stats/Demographics | Rates | Testimonial | Contact
Miscellaneous: Reference Desk | Sitemap
Related Reading
Researchers: Marine Reserve 'Na´ve Fish' Are Easy Targets For Spear Fishers; 'Literally More Catchable'
email to a friend email print this print      Bookmark and Share   RSS 2.0 feed

TOWNSVILLE, Queensland -- Big fish that have grown up in marine reserves don't seem to know enough to avoid fishers armed with spear guns waiting outside the reserve. The latest research by an Australian team working in the Philippines into the effects of marine reserves has found there is an unexpected windfall awaiting fishers who obey the rules and respect reserve boundaries -- in the form of big, innocent fish wandering out of the reserve.

"There are plenty of reports of fish, both adults and juveniles, moving out of reserves and into the surrounding sea. Having grown up in an area where they were protected from hunting, we wondered how na´ve they would be with regard to avoiding danger from humans," says Fraser Januchowski-Hartley of the ARC Centre of Excellence for Coral Reef Studies.

The answer is: pretty na´ve. "Educated fish normally turn tail and flee when a diver armed with a spear gun approaches within firing range of them. The typical flight distance is usually just over four meters," he explains.

"However in our studies of marine reserves in the Philippines, Vanuatu and Papua New Guinea, where spearfishing remains a major way of harvesting table fish, we discovered that reserve-reared fish were much less wary and allowed people to get much closer.

"The fish are literally more catchable."

The team studied fish across the boundaries of marine reserves from 200m inside the protected areas to 200m into the fished areas. They used underwater markers and measuring tapes to measure the 'flight initiation distance' of fish targeted locally by spearfishers. This indicates how close a skin diver can approach to a large fish before it decides to turn and flee.

They found that target fish living in fished areas were typically much warier of divers, and took flight at distances a metre or two further away, than ones living within the reserve.

They also established that the 'naivete radius', whereby more catchable fishes spill out of the marine reserves extended for at least 150 meters from the boundary.

The team's findings suggest that fishers are more likely to catch fish that stray out of the reserve, and so improve the local fish harvest. This may help fishers become more supportive of marine reserves.

"In these parts of the oceans, spear fishing is still very much about survival for humans and putting food on the family table -- so it is important that local fishers feel they are deriving some benefit from having a local area that is closed to fishing, or they may not respect it," says Dr Nick Graham, a co-author on the study.

"This information is also useful in traditional reserves where fishing is taboo most of the time, but then they are opened for fishing by village elders just a few days a year.

"On the face of it, this work suggests that marine reserves can play an important role in putting more fish on the table of local communities in these tropical locations -- as well as conserving overall fish stocks and replenishing those outside the reserve," Januchowski-Hartley says.

Views expressed in this article do not necessarily reflect those of UnderwaterTimes.com, its staff or its advertisers.

Reader Comments

2 people have commented so far. cloud add your comment

Except in California they do not leave the reserves.
   comment# 1   - Joe · Pasadena, Ca · Nov 14, 2012 @ 8:45am

Surely you jest (Okay, I know you are serious and don't like to be called Shirley). But this article is just plain ridiculous. First, while I am an experienced diver (USN, and Civilian certs as Master Diver, Dive Master, Instructor, Wreck Diver. etc.), I have rarely spear-fished, Second, Marine Reserves are NOT set up to protect adult species; Rather, they are established to provide safe harbor for selected species to reproduce. Third, to suggest that spear fishers, or even sport fishermen, are having any significant impact on adults that leave the Reserve is just plain stupid! What are the adults gonna do, stay there??? I think not! And to think that a few spear fishers, or sport fishermen could seriously affect ANY species, is patently absurd.
   comment# 2   - Don James · Rutledge USA · Nov 14, 2012 @ 2:06pm
Add your comment


characters left

*required field.
Note: Comments are posted if they are not abusive and are compliant with our Terms and Conditions. Comments with foul language will be deleted without exception.

   


bottom_left
bottom_right
Privacy Policy     © Copyright 2014 UnderwaterTimes.com. All rights reserved