COMPARATIVE ANALYSIS OF THE WHITE SPOT DEEP SHRIMP FISHING (Pandalus platycerus) USING TRAWL NETS IN THE PERIOD 2004/2005 AND TRAPS IN THE PERIOD 2022/2023

• DOI: 10.22533/at.ed.9733132324086

• Palavras-chave: Fishing, P. platycerus, analysis, drag, traps.

• Keywords: Fishing, P. platycerus, analysis, drag, traps.

• Abstract:

  Two artisanal white spot shrimp fishing systems are examined (Pandalus platycerus) in the Mexican Pacific, trawling off the western coast of Baja California in the 2004/2005 period and trapping in Rosarito, Baja California in the 2022/2023 period. The following were analysed: fishing yields, size structure, length-weight relationship, bycatch and, in the case of the trap system, yield by type of trap. In the case of the trawl net, the resource was reported between 126 and 252 m deep in a series of fishing days carried out from La Bufadora, San Miguel and Rosarito, Baja California. Together with the target species, nine species of crustaceans (two stomatopods and seven decapods) were collected, of which two (Sicyonia disedwardsi and Lopholithodes foraminatus) represent a first record for the area. 

  Besides P. platycerus which represents an important fishery resource not yet exploited in Mexico, five bycatch species were collected (Sicyonia ingentis, Sicyonia disedwardsi, Crangon nigromaculata, Cancer anthonyi and C. gracilis) rrepresenting interesting secondary fishery resources. In the experimental work on traps, the resource was monitored with two different designs: rectangular and conical/truncated, with the rectangular trap model being the one that achieved the best relative abundance indices with values that fluctuated between 0.165 kg/trap (rectangular) at 0.093 kg/trap (conical), with an average value of 0.129 kg/trap throughout the surveyed area. A relevant aspect in this study is the effectiveness of the traps with respect to trawling, since, as the product is marketed alive, 99% survive with traps, while 40% survive with trawl capture.