Abesamis et al : How much does the fishery at Apo Island benefit from spillover from a marine reserve' 



369 



Table 4 



Frequency and probability of capturing or landing a high yield of high-value species within each species gr-oup for each of the 

 three fishing grounds at Apo Island (see Fig. 1), Upper values: frequency (number of fishing trips) and probability (in parenthe- 

 ses) of capturing high-value species. Lower values; frequency (number of fishing trips) and probability (in parentheses) of landing 

 a high yield of high-value species. Highest frequencies are marked with the symbol t. Highest probabilities are marked with the 

 symbol ±. Price per kg and prices of what were considered "high yield" are given in Philippine pesos (PHP). 



Species groups, families 



Northern Apo Island 



Western Apo Island 



Near Apo Reserve 



Reef-associated species (Carangidae) 

 75 PHP/kg 

 £7.0 kg or PHP 525 



Reef planktivores (Caesionidae) 

 55 PHP/kg 

 >3.0 kg or PHP 165 



Reef species (Serranidae, Lutjanidae, Lethrinidae) 

 70-75 PHP/kg 

 22.0 kg or PHP 150 



Open water species (Scombridae) 

 75-90 PHP/kg 

 >7.0 kg or PHP 525 



Off-reef species (Lutjanidae) 

 75 PHP/kg 

 >2.0kgorPHP 150 



tured weighed alS kg (equivalent to a value 

 of all25 PHP). The largest was a 31.9-kg C. 

 ignobilis valued at 2393 PHP, which was also 

 the biggest fish caught during our study. In 

 contrast, only eight captures of high-value 

 reef-associated species were made near Apo 

 Reserve. In only four of these captures were 

 the yields ^7.0 kg or 525 PHP. Only one of the 

 fishes captured near the reserve weighed >15 

 kg. This was a 20.2-kg C. ignobilis valued at 

 1515 PHP. 



Capturing high-value species and landing a 

 high yield of such species often had the great- 

 est probability of occurring on the northern 

 fishing grounds (Table 4). For example, the 

 probability of capturing high-value reef-as- 

 sociated species from the northern fishing 

 grounds was 0.07. Landing a high yield of 

 such species from this area had a probability 

 of 0.03. In contrast, the probability of captur- 

 ing high-value reef-associated species near 

 Apo Reserve was 0.05. Landing a high yield 

 of such species near the reserve had a prob- 

 ability of 0.02. However, the probability of 

 capturing high-value reef species (Serrani- 

 dae — Cephalopholis, Epinephelus, Variola spp.; 

 Lutjanidae — Aprion, Lutjanus, Macolor. Sym- 

 phorichthys, Symphorus spp.; and Lethrinidae — 

 Lethrinus spp.) was greatest near Apo Reserve (Table 

 4). The probability of landing a high yield of such spe- 

 cies (>2.0 kg or 150 PHP) was also greatest near the 



Hook and line 



Gill net 



3£ 



Q- ^ 

 O <i> 



E m 



1 5 



1 



00 



- 160 



UJ ^ 



D ^ 



Q. D 



— Q. 



E C 



=1 o 



E 2 



120 



80 



Q- 

 X 



'h. 



1 5 

 12 

 09 

 06 

 03 

 00 



80 

 60- 

 40 

 20 



40 



30 



Spear gun 



NR w 



NR W 



250 



200' 



100 



NR W 



NR W 



JL 



Figure 5 



Maximum monthly mean catch per unit of effort (CPUE) and income 

 per unit of effort (IPUE) for hook-and-line, gill-net, and spear gun 

 gear used at the three fishing grounds at Apo Island. NR = near 

 Apo Reserve, W=western Apo Island, N = northern Apo Island (see 

 Fig. 1). Error bars are 1 standard error. PHP=Philippine peso. 



reserve, despite the higher frequency of capturing high- 

 value reef species, or landing a high yield of such spe- 

 cies, on the northern fishing grounds than near Apo 

 Reserve (Table 4). 



