Data Set (knb-lter-sbc.77.2)

SBC LTER: Reef: Abundance, size and fishing effort for California Spiny Lobster (Panulirus interruptus), ongoing since 2012

  Summary and Data Links People and Organizations Temporal, Geographic and Taxonomic Coverage Methods and Protocols  

These methods, instrumentation and/or protocols apply to all data in this dataset:

Protocols and/or Procedures
Description:

The number and sizes of spiny lobster are recorded by divers in four 60 x 5 m (300 m2 total) lobster transects that are associated with each permanent SBC LTER kelp forest community survey transect.

Data on the abundance and size of the California spiny lobster, Panulirus interruptus, are collected annually in late summer at five sites (Arroyo Quemado, Carpinteria, Isla Vista, Mohawk and Naples) along the mainland coast of the Santa Barbara Channel. Two of these sites (Naples and Isla Vista) were designated as Marine Protected Areas (MPA) in January 2012. The abundances of algae, invertebrates and fish have been monitored at these sites since 2001 in replicate 40 m x 2 m permanent SBC LTER transects. Although lobsters are counted in these transects, their density is not high enough to obtain reliable estimates of abundance. Therefore, the additional surveys were initiated in 2012, which encompass a much larger sampling area and focus exclusively on lobster.

Protocol:
Author: Reed
Title: SBC LTER Protocols - Reed Lab - Lobster Abundance and Size-20141007
Available Online:
 View: http://sbc.lternet.edu/external/Reef/Protocols/lobsters/Reed_2014-09-29_lobster_abundance.pdf
Description:

Observers count surface floats which mark baited wire traps used by the commercial fishery in depths less than 15 m, in defined areas of coastline.

The commercial fishery for the California spiny lobster (Panulirus interruptus) involves the use baited wire traps deployed on the bottom in rocky habitats and marked with surface floats (one trap per float). The fishing season lasts from October to March. The majority of fishing occurs in depths < 15 m. Fishing pressure by the commercial trap fishery is estimated at nine mainland areas, eight of which are SBC LTER kelp forest study sites. Two sites, Naples and Isla Vista, became marine protected areas (MPA) in January 2012. Fishing pressure is recorded by counting the number of traps in defined areas of coastline every two to four weeks during the fishing season (October to March). Lobster trap surveys began in October 2012.

Protocol:
Author: Reed
Title: SBC LTER Protocols - Reed Lab - Lobster Fishing Pressure-20141008
Available Online:
 View: http://sbc.lternet.edu/external/Reef/Protocols/lobsters/Reed_2014-09-29_lobster_trap_counts.pdf