animal
; coral reef
; ecosystem
; introduced species
; Perciformes
; Trinidad and Tobago
; Animals
; Coral Reefs
; Ecosystem
; Introduced Species
; Perciformes
; Trinidad and Tobago
Scopus学科分类:
Agricultural and Biological Sciences: Aquatic Science
; Earth and Planetary Sciences: Oceanography
; Environmental Science: Pollution
英文摘要:
Trinidad and Tobago was the last Caribbean island to be invaded by the lionfish and since its invasion in 2012 they have spread to most coral reef and hard bottom environments. Standard reef fish surveys were used to assess lionfish population densities and size distributions from 2013–2015. Total lengths ranged between 6.2–40.4 cm and 2.2–950 g in weight. The length-weight relationship was described by W = 0.0002 L2.5654. Fish densities were highest in the northeast Tobago at 326 lionfish/ha and the lowest in the southwest Tobago at 10.5 lionfish/ha. In order to curtail the spread of this invasive species, a culling programme was initiated at selected reefs to regularly remove lionfish at monthly intervals. On the selected reefs 26–30% reduction in mean lionfish biomass and 25–27% reduction in abundance was noted compared to control sites (p < 0.05). � 2016 Elsevier Ltd