Brief description of prey selectivity and ontogenetic changes in the diet of the invasive lionfish Pterois volitans (Actinopterygii, Scorpaenidae) in the Mexican Caribbean

2018 ◽  
Author(s):  
Juan Carlos Villaseñor-Derbez
Keyword(s):  
Stomach Contents ◽  
Ontogenetic Change ◽  
Prey Selectivity ◽  
Ontogenetic Changes ◽  
Pterois Volitans ◽  
Mexican Caribbean ◽  
Invasive Lionfish

Stomach contents were analyzed from 109 individuals. A total of 4 Genera and 14 Species were identified. Crustaceans accounted for %N=67.39% , %IRI= 86.37% of the total identified taxa and Teleosts %N=32.61% (%IRI = 13.63%). An ontogenetic change was observed in P. volitans diet.

scholarly journals Trophic overlap of lionfish (Pterois volitans) and two native predators (Lutjanus apodus and Cephalopholis cruentata) in the western Caribbean

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Brenda Iveth Murillo-Pérez ◽  
Juan Jacobo Schmitter-Soto ◽  
Dorka Cobián-Rojas ◽  
Roberto Luis Herrera-Pavón
Keyword(s):  
Stomach Contents ◽  
Early Morning ◽  
Time Of Day ◽  
Generalist Predator ◽  
Pterois Volitans ◽  
Western Atlantic ◽  
Mexican Caribbean ◽  
Western Caribbean ◽  
Trophic Overlap ◽  
Lutjanus Apodus

Abstract Impact of invasive species on native biota may be due to predation, competition for space or food, or indirect effects. Lionfish (Pterois volitans), invasive in the western Atlantic, is a voracious generalist predator, so it is expected to have a significant trophic overlap with native fishes of comparable size and habits. The goal of this study was to determine the diets of potential competitors of the lionfish, in particular a grouper, Cephalopholis cruentata (Graysby), and a snapper, Lutjanus apodus (Schoolmaster), and to compare them to the diet of lionfish in Xcalak, southern Mexican Caribbean. Stomach contents were analyzed and electivity and diet overlap were estimated. The trophic overlap between the lionfish and the two putative competitors, especially the grouper, was high, including prey that was consumed by the predators in higher proportion than the relative abundance of the prey in the environment, and probably at the same time of day. Lionfish and grouper shared as important diet items Stegastes sp., Halichoeres sp., Brachyura, and Palaemonidae, and most full stomachs were found during the early morning. The hypothesis of competition between them for particular prey is supported, so we advise to continue the culling programs of lionfish and also to monitor the abundance of the possible native competitors.

Larval sand lance (Ammodytes sp.) in the diet of small juvenile wolffish (Anarhichas spp.): predatory interactions in frontal water masses off western Greenland

2002 ◽  
Vol 59 (11) ◽  
pp. 1759-1767 ◽  
Author(s):  
Peter Munk
Keyword(s):  
Fish Larvae ◽  
Stomach Contents ◽  
Prey Type ◽  
Ontogenetic Changes ◽  
Sand Lance ◽  
Larval Size ◽  
Predatory Behaviour ◽  
Dietary Shift ◽  
Abundance Estimates ◽  
Anarhichas Lupus

The predatory behaviour of two species of juvenile wolffish (Anarhichas lupus and Anarhichas minor) was studied during a field campaign across a frontal area off western Greenland. The study focused on ontogenetic changes in prey-type and -size preference of the wolffish and their predatory impact on a cohabiting population of larval sand lance (Ammodytes sp.). Sampling took place along a cross-shelf transect at latitude 66°20' N, and the analysis is based on stomach contents of assembled wolffish (2–5 cm in length) and abundance estimates of plankton and fish. An ontogenetic change in wolffish prey preference was evident as a dietary shift from copepods and smaller amphipods to larger amphipods and fish larvae. The inclusion of fish larvae in the wolffish diet led to a marked increase in prey biomass, and fish larvae constituted up to 77% of diet biomass in the largest juveniles caught. Wolffish selectively targeted the smaller-sized part of the larval sand lance population; hence, larval vulnerability increased with decreasing size. Comparison between estimated predation rates and abundances of predator and prey indicated larval predation mortalities of up to 5% per day, with mortality peaking in the vicinity of a hydrographic front. Hence, findings suggest substantial predation pressure on larvae, primarily related to larval size and distribution.

scholarly journals Density-Dependent Growth in Invasive Lionfish (Pterois volitans)

PLoS ONE ◽  
2013 ◽  
Vol 8 (6) ◽  
pp. e66995 ◽  
Author(s):  
Cassandra E. Benkwitt
Keyword(s):  
Pterois Volitans ◽  
Density Dependent ◽  
Invasive Lionfish ◽  
Dependent Growth

scholarly journals Total mercury concentrations in invasive lionfish (Pterois volitans/miles) from the Atlantic coast of Florida

2020 ◽  
Author(s):  
Eric G. Johnson ◽  
Angelina Dichiera ◽  
Danielle Goldberg ◽  
MaryKate Swenarton ◽  
James Gelsleichter
Keyword(s):  
Total Mercury ◽  
East Coast ◽  
Trophic Position ◽  
Atlantic Coast ◽  
Marine Fishes ◽  
Pterois Volitans ◽  
Western Atlantic ◽  
Significant Barrier ◽  
Invasive Lionfish ◽  
Mercury Bioaccumulation

ABSTRACTInvasive lionfish (Pterois volitans/miles) pose a serious threat to marine ecosystems throughout the western Atlantic Ocean and Caribbean Sea. The development of a fishery for lionfish has been proposed as a strategy for controlling populations; however, there is concern about consumption of this species by humans due to its high trophic position and potential for bioaccumulation of mercury. We analyzed total mercury (THg) in tissues of lionfish from two locations on the east coast of Florida. THg in lionfish increased with size and differed by location and sex. THg was highest in muscle tissue and was strongly positively correlated among tissues. THg in lionfish was lower than other commonly consumed marine fishes, and falls into Florida’s least restrictive advisory level. Consumption of lionfish poses a low risk and concerns over mercury bioaccumulation should not present a significant barrier to lionfish harvest.

Diet and feeding strategy of thornback ray, Raja clavata (Chondrichthyes: Rajidae) from the Gulf of Gabes (Tunisia—Central Mediterranean Sea)

2014 ◽  
Vol 94 (7) ◽  
pp. 1509-1516 ◽  
Author(s):  
Hasna Kadri ◽  
Sondes Marouani ◽  
Mohamed Nejmeddine Bradai ◽  
Abderrahmen Bouaïn
Keyword(s):  
Feeding Strategy ◽  
Stomach Contents ◽  
Ontogenetic Changes ◽  
Central Mediterranean ◽  
Gulf Of Gabes ◽  
Gulf Of Gabès ◽  
Thornback Ray ◽  
Raja Clavata ◽  
Food And Feeding ◽  
Quantitative Analyses

Food and feeding strategy of the thornback ray, Raja clavata, were studied from stomach contents analysis of specimens caught monthly in the Gulf of Gabes. The data were analysed according to sex, size and season. At total of 1280 stomachs was examined, from specimens ranging from 14 to 110 cm total length (TL), of which 1076 (83.98%) contained food. Thornback ray feed mainly on teleosts, crustaceans and cephalopods, whereas gastropods and polychaetes are occasionally consumed. Significant differences were found between the diets of males and females; however, ontogenetic changes were also detected, with crustaceans constituting the greatest proportion of the diet of smaller rays. Both teleosts and cephalopods increased in importance with growth of the skates. Prey diversity increased with size; large and mobile prey species were more commonly found in the diet of larger skates. Diet composition showed seasonal variations. Quantitative analyses and graphical methods indicate that the thornback ray is a generalist feeder.

A differential prey response to invasive lionfish, Pterois volitans: Prey naiveté and risk-sensitive courtship

2014 ◽  
Vol 460 ◽  
pp. 1-7 ◽  
Author(s):  
Andrew N. Black ◽  
Sonia R. Weimann ◽  
Vance E. Imhoff ◽  
Martin L. Richter ◽  
Murray Itzkowitz
Keyword(s):  
Pterois Volitans ◽  
Risk Sensitive ◽  
Invasive Lionfish ◽  
Prey Naiveté ◽  
Prey Naïveté

scholarly journals Invasive Lionfish (Pterois volitans): A Potential Human Health Threat for Ciguatera Fish Poisoning in Tropical Waters

Marine Drugs ◽  
2013 ◽  
Vol 12 (1) ◽  
pp. 88-97 ◽  
Author(s):  
Alison Robertson ◽  
Ana Garcia ◽  
Harold Quintana ◽  
Tyler Smith ◽  
Bernard II ◽  
...  
Keyword(s):  
Human Health ◽  
Pterois Volitans ◽  
Tropical Waters ◽  
Health Threat ◽  
Ciguatera Fish Poisoning ◽  
Fish Poisoning ◽  
Invasive Lionfish ◽  
Potential Human Health
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