scholarly journals Application of DNA barcoding for identification of freshwater carnivorous fish diets: Is number of prey items dependent on size class for Micropterus salmoides ?

2013 ◽  
Vol 4 (2) ◽  
pp. 219-229 ◽  
Author(s):  
Hyunbin Jo ◽  
Jeong‐An Gim ◽  
Kwang‐Seuk Jeong ◽  
Heui‐Soo Kim ◽  
Gea‐Jae Joo
Keyword(s):  
Dna Barcoding ◽  
Micropterus Salmoides ◽  
Size Class ◽  
Carnivorous Fish ◽  
Fish Diets ◽  
Prey Items

scholarly journals Effect of the Human Utilization of Northern Snakehead (Channa argus Cantor, 1842) on the Settlement of Exotic Fish and Cladoceran Community Structure

2021 ◽  
Vol 13 (5) ◽  
pp. 2486
Author(s):  
Jong-Yun Choi ◽  
Seong-Ki Kim
Keyword(s):  
Community Structure ◽  
Fish Species ◽  
Micropterus Salmoides ◽  
Lepomis Macrochirus ◽  
Nakdong River ◽  
Exotic Fish ◽  
Carnivorous Fish ◽  
Channa Argus ◽  
The Nakdong River ◽  
Exotic Fish Species

Empirical studies suggest that changes in the density of top predators, such as carnivorous fish, in freshwater food webs, strongly affect not only fish communities but also various primary and secondary consumers. Based on these findings, we explored how differences in the utilization of carnivorous fish (i.e., Northern Snakehead, Channa argus) by humans affected the fish and cladoceran community structure as well as the settlement of exotic fish species (i.e., Lepomis macrochirus and Micropterus salmoides) in 30 wetlands located in the upper and lower reaches of the Nakdong River. Our results show that in the mid–lower reaches of the Nakdong River, the density of C. argus was low, while high densities of L. macrochirus and M. salmoides were observed. Exotic fish species are frequently consumed by C. argus, leading to a low density of L. macrochirus and M. salmoides in the upper reaches, which supported a high density of C. argus. However, in the mid–lower reaches, the density of L. macrochirus was high because of the frequent collection of C. argus by fishing activities. The dominance of L. macrochirus significantly changed the structure of cladoceran communities. L. macrochirus mainly feeds on pelagic species, increasing the density of epiphytic species in the mid–lower reaches. The continued utilization of C. argus by humans induced a stable settlement of exotic fish species and strongly affected the community structures of primary consumers in the 30 wetlands. The frequency of C. argus collection has to be reduced to secure biodiversity in the mid–lower reaches of the Nakdong River, which will reduce the proportion of exotic fish species and increase the conservation of native fish.

scholarly journals Low occurrence rates of ubiquitously present leptocephalus larvae in the stomach contents of predatory fish

2015 ◽  
Vol 72 (5) ◽  
pp. 1359-1369 ◽  
Author(s):  
Michael J. Miller ◽  
Jeff Dubosc ◽  
Elodie Vourey ◽  
Katsumi Tsukamoto ◽  
Valerie Allain
Keyword(s):  
Stomach Contents ◽  
Trophic Dynamics ◽  
Predatory Fish ◽  
Thunnus Albacares ◽  
Fish Diets ◽  
Thunnus Obesus ◽  
Leptocephalus Larvae ◽  
Subtropical Oceans ◽  
Oceanic Food Webs ◽  
Prey Items

Abstract Leptocephali, the larvae of eels, grow to large sizes and are widely distributed in tropical and subtropical oceans. Their role in oceanic food webs is poorly known because they are rarely reported as food items in fish stomach content studies. Data from 13 years of research on the trophic dynamics of Pacific Ocean predatory fish indicate that among 8746 fish of 76 species/taxa (33 families) that had been feeding, only 16 fish of 6 species had remains of 34 leptocephali in their stomachs. Only 0.013% of the 256 308 total prey items were leptocephalus larvae, and 0.03% of the total prey items were juvenile or adult eels (mostly snipe eels: Nemichthyidae). There were 10 fish of 2 species of lancetfish (Alepisaurus spp., n = 152), 2 rainbow runners (Elagatis bipinnulata, n = 222), and 2 yellowfin tuna (Thunnus albacares, n = 3103) that had leptocephali in their stomach contents, but all except one T. albacares (contained 15 leptocephali) had each eaten ≤3 leptocephali. A swallower, Pseudoscopelus sp., and a frigate tuna, Auxis thazard, had eaten single leptocephali. Twenty-eight bigeye tuna, Thunnus obesus, had eaten 76 juvenile/adult nemichthyid or serrivomerid eels. A literature survey found that only 15 out of 75 examined publications listed leptocephali in the stomach contents of a total of 6 species out of ∼ 42 300 predatory fish of 40 species. The transparency of leptocephali and their apparent mimicry of gelatinous zooplankton could contribute to lower rates of predation. Their soft bodies likely digest rapidly, so although this study and existing literature indicate that leptocephali sometimes contribute to predatory fish diets, particularly for fish that do not exclude gelatinous prey types, and fish with low digestion rates in their stomachs such as lancetfish, their levels of contribution to fish diets and the impacts of predators on eel recruitment remain uncertain.

scholarly journals Diet shifts and delayed piscivory specialisation during the ontogenesis of the largemouth bass Micropterus salmoides (Lacepede, 1802) in the Nakdong River and Upo Wetlands, South Korea

2016 ◽  
Vol 63 (4) ◽  
Author(s):  
Hyunbin Jo ◽  
Ju-Duk Yoon ◽  
Jeong-Hui Kim ◽  
Kwang-Seuk Jeong ◽  
Yuno Do ◽  
...  
Keyword(s):  
South Korea ◽  
Largemouth Bass ◽  
Prey Selection ◽  
Micropterus Salmoides ◽  
Habitat Type ◽  
Habitat Characteristics ◽  
Diet Shift ◽  
Ontogenetic Changes ◽  
Nakdong River ◽  
Prey Items

In this study, we examined the ontogenetic changes in prey selection pattern of largemouth bass Micropterus salmoides (Lacepede, 1802) in accordance with habitat type. The stomach contents of largemouth bass were analysed with respect to predator size classes for two different habitats (Nakdong River main channel and the Upo Wetlands tributary) in South Korea, that differed in the diversity of potential prey items. The diversity (H′) of invertebrate diet items in stomach of largemouth bass was found significantly different between the study sites. Small large mouth bass (<100 mm) preferred to consume decapods and mayflies in the river and wet land systems respectively. Fishes >100 mm in the river and >200 mm in the wet land system preferred fish as their prey. Results demonstrated variations in composition of prey items as influenced by habitat characteristics as well as habitat use type, contributed to the delayed ontogenetic diet shift in the largemouth bass population.

Effectiveness of DNA barcoding for identifying piscine prey items in stomach contents of piscivorous catfishes

2015 ◽  
Vol 99 (1) ◽  
pp. 161-167 ◽  
Author(s):  
Z. Moran ◽  
D. J. Orth ◽  
J. D. Schmitt ◽  
E.M. Hallerman ◽  
R. Aguilar
Keyword(s):  
Dna Barcoding ◽  
Stomach Contents ◽  
Prey Items

scholarly journals DNA barcoding and nutritional analysis as a tool for promoting the market of inland fish species

2021 ◽  
Vol 10 (3) ◽  
Author(s):  
Iolanda Venuti ◽  
Marina Ceruso ◽  
Giuseppe Palma ◽  
Giorgio Smaldone ◽  
Tiziana Pepe
Keyword(s):  
Fatty Acids ◽  
Dna Barcoding ◽  
Fish Species ◽  
Cyprinus Carpio ◽  
Micropterus Salmoides ◽  
Central Italy ◽  
Anguilla Anguilla ◽  
Coi Gene ◽  
Local Market ◽  
Market Demand

The increasing world market demand for seafood requires an expansion of product categories available to consumers. Inland fish are usually considered having unmarked taste and are less appreciated by consumers; thus, they have low commercial value. Therefore, the marketing of the lake’s fresh and processed fish is limited to the local market and consumers are currently uninformed and mistrustful about these species. In this study, six different fish species were caught in the Fondi lake (Lazio, central Italy): Anguilla anguilla, Tinca tinca, Carassius gibelio, Cyprinus carpio, Micropterus salmoides, Chelon ramada. All the samples were subjected to nutritional and DNA barcoding analysis. Moisture, protein, fat, carbohydrates, ash, and sodium content were measured. As regards the fatty acids profile, the most abundant were MUFAs with the highest value in Anguilla anguilla (45.97%). Oleic acid (C18: 1 n9 cis) was particularly high in Cyprinus carpio (55.46%). The fraction of polyunsaturated fatty acids (PUFA) revealed a higher DHA content (C22: 6 n3) in Anguilla anguilla than the other species (>12 %) while Chelon ramada presented both higher EPA content (C 20: 5 n3) and total fraction of omega 3 PUFAs. Concerning molecular analysis, a 655 bp fragment of cytochrome C oxidase subunit I (COI) gene was successfully used for the identification at the species level using both BOLD and BLAST public databases. The present study gives the basis for improving the knowledge and promoting inland fish’ market and traceability along the supply chain.

scholarly journals First report of lionfish prey from Western Florida waters as identified by DNA barcoding

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9922 ◽  
Author(s):  
Carlos A. Santamaria ◽  
James Locascio ◽  
Taylor M. Greenan
Keyword(s):  
Dna Barcoding ◽  
Regional Differences ◽  
Prey Species ◽  
Fish Prey ◽  
Crustacean Species ◽  
First Report ◽  
Eastern Gulf Of Mexico ◽  
Coi Barcoding ◽  
Coi Sequences ◽  
Prey Items

DNA barcoding was used to identify prey fragments recovered from the stomachs of lionfish harvested during the 2016 Sarasota Lionfish Derby. A total of 305 prey fragments were recovered from 50 stomachs (mean = 4.6 per stomach), of which 184 (60.3%) fragments could be identified to either species or genus when Cytochrome Oxidase I (COI) sequences were queried against the Barcode of Life Database. We identified 21 fish prey species which represented fourteen families and accounted for 95.7% of genetically identifiable prey items. The remaining prey items identified corresponded to six crustacean species. The four most common prey taxa in lionfish stomachs were Ptereleotris calliura (24.3%), an unidentified Microgobius species (20.4%), Diplectum formosum (14.3%), and Apogon aurolineatus (12.2%). The most frequently observed crustacean species, Metapenaeopsis goodei, was found in only three stomachs (6.1%). We also report eleven taxa as putative novel lionfish prey species, most of which are common in Florida waters. Sixteen prey items were identified as lionfish (P. volitans); however, it was not definitive whether these detections were due to cross contamination or cannibalization. This represents the first report of lionfish diets from Florida waters in the Eastern Gulf of Mexico based on barcoding efforts. Our results are largely congruent with previous COI barcoding based studies of lionfish diets, indicating these predators to be generalists exhibiting preferences for specific prey traits but with regional differences in their diets.

DNA metabarcoding reveals the broad and flexible diet of a declining aerial insectivore

The Auk ◽  
2019 ◽  
Vol 136 (1) ◽  
Author(s):  
Beverly McClenaghan ◽  
Erica Nol ◽  
Kevin C R Kerr
Keyword(s):  
Dna Barcoding ◽  
Prey Availability ◽  
Reference Database ◽  
Large Prey ◽  
Breeding Sites ◽  
Insect Prey ◽  
Aerial Insectivore ◽  
Aerial Insectivores ◽  
Barn Swallows ◽  
Prey Items

Abstract Aerial insectivores are highly mobile predators that feed on diverse prey items that have highly variable distributions. As such, investigating the diet, prey selection and prey availability of aerial insectivores can be challenging. In this study, we used an integrated DNA barcoding method to investigate the diet and food supply of Barn Swallows, an aerial insectivore whose North American population has declined over the past 40 yr. We tested the hypotheses that Barn Swallows are generalist insectivores when provisioning their young and select prey based on size. We predicted that the diets of nestlings would contain a range of insect taxa but would be biased towards large prey items and that the diet of nestlings would change as prey availability changed. We collected insects using Malaise traps at 10 breeding sites and identified specimens using standard DNA barcoding. The sequences from these insect specimens were used to create a custom reference database of prey species and their relative sizes for our study area. We identified insect prey items from nestling fecal samples by using high-throughput DNA sequencing and comparing the sequences to our custom reference database. Barn Swallows fed nestlings prey items from 130 families representing 13 orders but showed selection for larger prey items that were predominantly from 7 dipteran families. Nestling diet varied both within and between breeding seasons as well as between breeding sites. This dietary flexibility suggests that Barn Swallows are able to adjust their provisioning to changing prey availability on the breeding grounds when feeding their nestlings. Our study demonstrates the utility of custom reference databases for linking the abundance and size of insect prey in the habitat with prey consumed when employing molecular methods for dietary analysis.

Gutsy genetics: identification of digested piscine prey items in the stomach contents of sympatric native and introduced warmwater catfishes via DNA barcoding

2016 ◽  
Vol 100 (4) ◽  
pp. 325-336 ◽  
Author(s):  
Robert Aguilar ◽  
Matthew B. Ogburn ◽  
Amy C. Driskell ◽  
Lee A. Weigt ◽  
Mary C. Groves ◽  
...  
Keyword(s):  
Dna Barcoding ◽  
Stomach Contents ◽  
Prey Items
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