the Argentine anchoita, Atlantic cutlassfish, and rough scad) and were principally responsible for the differentiation of the SACW assemblage structure from the CW+M assemblage structure (Table 6); group B, formed mostly (85% of species sampled) by species that were more abundant in the CW+M (e.
Our findings reveal that the pelagic aggregations of fishes over the SBB shelf were dominated by highly abundant mid-trophic-level schooling species in association with predatory fishes (of which the Atlantic cutlassfish was the most representative).
Large bycatches of American coastal pellona and Atlantic cutlassfish are common in bottom trawl fisheries in the SBB (e.
Aggregations at depths of approximately 100 m were composed mainly of Argentine anchoita (89% of the total catch), followed by American coastal pellona (7%), Atlantic cutlassfish (7%), white snake mackerel (7%), and rough scad (1%).
The occurrence of Pacific cutlassfish, Pacific sardine, plainfin midshipman, northern anchovy, Pacific mackerel, and jack mackerel was significantly different (P<0.
In September, when diversity was low, the dominant prey at San Esteban, El Rasito, and Los Machos was Pacific sardine, whereas at Isla Granito, it was Pacific cutlassfish (Fig.
Their greater importance in the diet at southern rookeries was probably due to the absence of more preferred prey such as Pacific sardine, Pacific cutlassfish, or anchoveta.
Zone I, which included San Pedro Martir, San Esteban, and El Rasito, was characterized by the consumption of lanternfish; zone II, which included Los Machos was characterized by the consumption of Pacific sardine and Pacific mackerel; zone III, which included Isla Granito, by the consumption of Pacific cutlassfish and the northern anchovy; and zone IV, Los Cantiles and Isla Lobos, was characterized by the consumption of the plainfin midshipman and the Pacific cutlassfish.
6) indicates that cutlassfish otoliths continuously increase in weight with age.
A formal stock assessment should be conducted with special emphasis on establishing an ecologically sustainable cutlassfish fishery in the South China Sea to prevent overfishing, or even fishery collapse, as has occurred in the northern populations of trichiurids.
Age and growth of cutlassfish, Trichiurus lepturus in Tsushima waters.