233
8 Fishery and Biological Implications of Fishing Spawning Aggregations…
(continued)
Brown-marbled
grouper and
squaretail
coralgrouper
Epinephelus
fuscoguttatus
and
Plectropomus
areolatus
Epinephelidae Spearfi shing, hook
and line
Southern Manus,
PNG.
Fisher knowledge indicated declines in aggregations and in 2004 led the community to
institute a lunar-based ban on spearfi shing and
commercial fi shing at the aggregation site in
the10 days leading up to and including the
new moon in every month of the year. Only
subsistence hook and line fi shing was allowed.
In early 2007 when the results of monitoring
indicated that aggregation numbers had not
improved a 1 year ban on all fi shing on the site
was introduced in the 10 days of each month
of the year during which aggregations formed
Hamilton et al.
( 2004 ) , Chaps.
12.2 , 12.8
Gulf grouper
Mycteroperca
jordani
Epinephelidae Gill nets, hook and
line, spearguns
Gulf of
California,
Mexico
Comprised 45% of fi nfi sh production of Baja
California Sur in 1960, but dropped to 6% by
1972 and to <1% by 2004. There has been a
tenfold reduction in daily landings and CPUE
between 1950s and 2000s, and entire fi shery is
comprised of juvenile fi sh. In 1960s, a fl eet of
six boats would land up to 63 tonnes/month
from one site during peak aggregation season.
Recent underwater surveys reveal a population
of 3 adult Gulf grouper at the site. No targeted
management related to protection of aggregations; no commercial limits or restrictions;
daily catch limit for recreational fi shers is not
clear and not enforced
Saenz-Arroyo et al.
( 2005 ) , Sala et al.
( 2003 ) , AburtoOropeza et al.
( 2008 )
8 Fishery and Biological Implications of Fishing Spawning Aggregations…
(continued)
Brown-marbled
grouper and
squaretail
coralgrouper
Epinephelus
fuscoguttatus
and
Plectropomus
areolatus
Epinephelidae Spearfi shing, hook
and line
Southern Manus,
PNG.
Fisher knowledge indicated declines in aggregations and in 2004 led the community to
institute a lunar-based ban on spearfi shing and
commercial fi shing at the aggregation site in
the10 days leading up to and including the
new moon in every month of the year. Only
subsistence hook and line fi shing was allowed.
In early 2007 when the results of monitoring
indicated that aggregation numbers had not
improved a 1 year ban on all fi shing on the site
was introduced in the 10 days of each month
of the year during which aggregations formed
Hamilton et al.
( 2004 ) , Chaps.
12.2 , 12.8
Gulf grouper
Mycteroperca
jordani
Epinephelidae Gill nets, hook and
line, spearguns
Gulf of
California,
Mexico
Comprised 45% of fi nfi sh production of Baja
California Sur in 1960, but dropped to 6% by
1972 and to <1% by 2004. There has been a
tenfold reduction in daily landings and CPUE
between 1950s and 2000s, and entire fi shery is
comprised of juvenile fi sh. In 1960s, a fl eet of
six boats would land up to 63 tonnes/month
from one site during peak aggregation season.
Recent underwater surveys reveal a population
of 3 adult Gulf grouper at the site. No targeted
management related to protection of aggregations; no commercial limits or restrictions;
daily catch limit for recreational fi shers is not
clear and not enforced
Saenz-Arroyo et al.
( 2005 ) , Sala et al.
( 2003 ) , AburtoOropeza et al.
( 2008 )