THE FISHERIES RESOURCE STATUS OF VISAYAN SEA
Sheryll V. Mesa NATIONAL STOCK ASSRSSMENT PROGRAM Bureau of Fisheries and Aquatic Resources Regional Field Office 6 Iloilo City
Stakeholders Meeting. Iloilo Grand Hotel, Iloilo City. 05March 2014 Visayan Sea
Philippine shelf: 184,000 km2 Visayan Sea area: about 10,000 km2 (5% of the Philippines shelf) (Warfel & Manacop, 1950)
Visayan Sea Fish production: 230,000 mt (BFAR Fisheries Data, 2000) 14% of the total marine harvest LOCATION: REGION 5 11o to 12oN 123o to 124oE
DEPTH: 20-40m -SW 41-180m - NE
REGION 6
REGION 7
Boundaries by region BFAR’S STOCK ASSESSMENT INITIATIVES TRAWL SURVEYS CONDUCTED FOR VISAYAN SEA
September 1948 (Warfel and Manacop) 1976 – 1977 (Aprieto et al.) July 2003 (GTZ and DA-BFAR) March 2007 (DA-BFAR and guests) April 2013 (DA-BFAR)
Swept-area Method
Trawl Survey Biomass Estimates in the Visayan Sea
BFAR’S STOCK ASSESSMENT INITIATIVES
in support to FAO 167 Implementation
Graph showing the monthly frequency distribution and GSI of gonadal stages of female S. gibbosa from Western Visayan Sea SARDINES SPAWNING AREA
Juvenile Map showing the aggregation of juvenile and spawner stages of sardines observed Spawner in Western Visayan Sea 600 CS 1-Nov. 2011 to Mar 2012 CS 2-Nov. 2012 to Mar 2013
500 (Intensive IEC & MCS)
400
300 Catch (MT) Catch 200
100
0 Nov Dec Jan Feb Mar Apr May June
GRAPH SHOWING LANDED CATCH (MT) OF SARDINES OBSERVED ON TWO SUCCEEDING CLOSED SEASON (CS) - CY 2011-2012 AND CY 2012-2013
Region 6 -NSAP BFAR’S STOCK ASSESSMENT INITIATIVES Milagros Map of Visayan N Balud Sea showing Placer the 18 monitoring VISAYAN centers for Roxas City Year 2003- Carles SEA Estancia 2007
Daanbantayan
Concepcion
Ajuy Medellin
San Remegio
Cadiz
Iloilo City Danao Mandaue
35,000 Commercial Annual Catches (MT) 30,000
25,000 20,000
15,000 Catch (MT) Catch 10,000
5,000 0 2003 2004 2005 2006 2007 2008 2009 2010 2011
CFVL/CFVG Municipal Annual Catches (MT) 1,800 Moratorium 1,600 Period 1,400
1,200 1,000 800 600
400 Catch (MT) Catch 200 0 2003 2004 2005 2006 2007 2008 2009 2010 2011 Year
1,800 1,600 Commercial
1,400
1,200 1,000
800 CFVL/
600 CPUE (kg/d) CPUE 400 CFVG Moratorium 200 Period 0 2003 2004 2005 2006 2007 2008 2009 2010 2011 100 90
80 Municipal 70 60 50
40 CPUE (kg/d) CPUE 30 20 10 0 2003 2004 2005 2006 2007 2008 2009 2010 2011 Year 35.00
30.00
25.00
20.00
15.00 L50(cm) 10.00
5.00
- 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
YEAR
R. kanagurta 20
16
12 L50 L50 (cm)
8
4
0 2004 2005 2006 2007 2008 2009 2010 2011
YEAR S. lemuru Potential Yield 60.00 2003 50.00 2004 2006 2005 40.00 2007
30.00
Yield Yield ('000 MT) 20.00 Schaefer 10.00 Fox Data
- - 20,000 40,000 60,000 80,000 100,000
Effort (# of Fishing boats)
Indicator Schaefer Fox 15 % Effort Reduction MSY (‘000 MT) 51.10 47.34 based on the CY 2007 Data fMSY (# of Fb Units) 57,378 52,340 TOTAL INVENTORY OF FISHING VESSEL 2005
Fishing Gears 2005 Beach seine 40 Skimming net 1 Bottomset gillnet 195 Crab net 444 Crab liftnet 5 Fish liftnet 1 Drift gillnet 787 Troll line 13 Danish seine 362 Drive-in-net 3 Fish coral 133 Round haul seine 7 Hand line 1,895 Scoop net 2 Squid jigger 78 Crab pot 466 Multiple hand line 209 Trammel net 7 Otter trawl 451 Filter net 31 Bottomset LL 174 Skimming net 1 Bag net 7 Barrier net 18 Fish pot 20 Crab trap 62 Spear gun 17 Encircling filternet 7 Encircling gillnet 60 Fish net 11 Push net 7 Gillnet 781 Fish trap 43 Purse seine 147 Ring net 126 Filter net 5 Stationary liftnet 140 Stationary liftnet 2 Squid trawl 30 GRAND TOTAL 6,788 TOTAL INVENTORY OF FISHING VESSEL 2011 Barrier net 31 Gleaning 1 BD 69 Multiple hook & line 7 Bag net 59 Manual push net 19 Motorized Push net 2 Surface set gillnet 59 Beach seine 56 Mid-water trawl 1 Bottomset gill net 2693 Otter trawl 242 BSGN/DGN 3 Panungkit 13 Bottomset longline 349 Purse seine 11 Crab liftnet 69 Round haul seine 55 Crab net 5 Scoop net 51 Compressor 81 Stationary lift net 40 Crab pot 616 Surrounding net 72 Crab trap 55 Spear gun (manual) 178 Drift gillnet 695 Spear gun(Compressor) 5 Drive-in gillnet 27 SpG/ScN 27 Drive-in-net 4 Squid jigger 1031 Diving 4 Squid pot 11 Drift longline 3 Squid trawl 187 Danish seine 120 Shrimp trawl 20 Encircling gillnet 200 Trawl 149 EGN/ScN 4 Stake trap 9 Fish coral 228 Troll line 169 Filter net 41 Trammel net 7 Fish pot 226 Trawl & Seine 4 Fry dozer 5 Tulis 13 Fish trap 92 Yabyab 4 Hook line 2535 GRAND TOTAL 10,567 ANNUAL ON-SITE INVENTORY OF FISHING VESSELS UNLOADING IN CARLES, ESTANCIA, & CONCEPCION, ILOILO COMMERCIAL SECTOR No. of Vessels Landing by Port Inventory Fish Port 2008 2009 2010 2011 2012 2013 Bancal Municipal Fish Port, Carles 215 405 468 679 447 332 Concepcion Municipal Fish Port 140 467 560 578 670 623 Estancia Fish Port Complex 266 252 207 216 219 248 TOTAL 621 1,124 1,235 1,473 1,336 1,203
MUNICIPAL SECTOR No. of Vessels Landing by Port Inventory Fish Port 2008 2009 2010 2011 2012 2013 Bancal Municipal Fish Port, Carles 1,038 2,033 1,322 1,727 2,157 1,844 Concepcion Municipal Fish Port 696 1,995 1,748 1,914 2,140 2,190 Estancia Fish Port Complex 756 608 597 659 678 1,059 TOTAL 2,490 4,636 3,667 4,300 4,975 5,093 STATUS:
Overfishing in the Visayan Sea had been apparent
Despite the need for 15% effort reduction (fishing boats operating) shown in MSY finding in year 2007, an increase in vessel operation is observed during the 2011 total inventory
Results in CFVL/CFVG Moratorium & intensive IEC for FAO 167 as fisheries law enforcement initiatives, Visayan Sea fish stocks could immediately recover if enforcement is properly implemented