Feeding ecology and basal food sources that sustain the Paradoxal frog Pseudis minuta: a multiple approach combining stomach content, prey availability, and stable isotopes

Hydrobiologia ◽  
2014 ◽  
Vol 740 (1) ◽  
pp. 253-264 ◽  
Author(s):  
Sonia Huckembeck ◽  
Daniel Loebmann ◽  
Edelti F. Albertoni ◽  
Sonia M. Hefler ◽  
Mauro C. L. M. Oliveira ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Stomach Content ◽  
Feeding Ecology ◽  
Prey Availability ◽  
Food Sources ◽  
Multiple Approach ◽  
Pseudis Minuta

Do macrophytes act as restaurants for fishes in tropical beaches? An approach using stomach content and prey availability analyses

2021 ◽  
Author(s):  
Jonas de Andrade Santos ◽  
Rafael Lima Oliveira ◽  
Ana Paula Penha Guedes ◽  
Alexandre Clistenes de Alcântara Santos ◽  
Leonardo Evangelista Moraes
Keyword(s):  
Stomach Content ◽  
Optimal Foraging ◽  
Prey Availability ◽  
Influence Factors ◽  
Optimal Foraging Theory ◽  
Sandy Beaches ◽  
Food Sources ◽  
Brazilian Coast ◽  
Trophic Guild

Tropical sandy beaches have low primary productivity, thus depend on external food sources. Generally, allochthonous macrophytes, form the basis of these food webs, and also may influence factors such as fish’s abundance, richness, species composition, and biomass. However, the role of macrophytes to the feeding ecology of fishes in tropical sandy beaches is uncertain. We aim to explain if this microhabitat acts as restaurants for fishes by performing stomach content and prey availability analyses using Ophioscion punctatissimus as a model because it has an association with detached macrophytes mainly on sandy beaches along the northeastern Brazilian coast. The most consumed prey was crustaceans, mainly amphipods, which were eaten in a specialist way, especially by the smaller fishes. The prey availability along with electivity index suggested that this species choose amphipods. Seasonal variations may indicate that the fishes did not locate their preferential prey as an effect of the availability, this can be also explained by factors such as palatability, and optimal foraging theory. Here, we redefined the O. punctatissimus trophic guild as zooplanktivorous, highlighting macrophytes as restaurants for fishes in tropical sandy beaches as they are the main source of food, adding another function to this microhabitat in this environment.

Effect of prey abundance and size on the distribution of demersal fishes

2012 ◽  
Vol 69 (1) ◽  
pp. 191-200 ◽  
Author(s):  
Andrew F. Johnson ◽  
Maria Valls ◽  
Joan Moranta ◽  
Stuart R. Jenkins ◽  
Jan G. Hiddink ◽  
...  
Keyword(s):  
Fish Species ◽  
Stomach Content ◽  
Prey Size ◽  
Prey Availability ◽  
Demersal Fish ◽  
Stomach Content Analysis ◽  
Prey Abundance ◽  
Food Sources ◽  
Gape Size ◽  
Feeding Potential

Many demersal fish species rely on benthic prey as food sources for part of, or in some cases, all of their life history. We investigated the relationships between prey and predator abundance and prey size and predator mouth gape size for nine demersal fish species. Of the species analysed, four showed a significant positive increase in abundance with increasing prey abundance. Prey size is thought to be an important parameter for demersal fish that are limited in their feeding potential by their mouth gape size, as it influences consumption rate and energy expenditure while foraging. The relationship between prey size and mouth gape was investigated using both stomach content data and prey availability data. Stomach content analysis revealed positive relationships between maximum prey size and predator mouth gape size for six of the species. Indications of prey size selectivity were only seen in the environment for European hake ( Merluccius merluccius ), highlighting the potential importance of prey size over prey abundance for this species. The results demonstrate that prey abundance and size are of significance for some demersal fish species feeding primarily on benthos and will help in defining habitat requirements of demersal fish species.

scholarly journals Stable isotopes document inter- and intra-specific variation in feeding ecology of nine large southern Procellariiformes

2013 ◽  
Vol 490 ◽  
pp. 255-266 ◽  
Author(s):  
A Jaeger ◽  
S Jaquemet ◽  
RA Phillips ◽  
RM Wanless ◽  
P Richard ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Feeding Ecology ◽  
Specific Variation

Determination of food sources and trophic position in Malaysian tropical highland streams using carbon and nitrogen stable isotopes

2017 ◽  
Vol 37 (2) ◽  
pp. 97-104 ◽  
Author(s):  
Dhiya Shafiqah Ridzuan ◽  
Che Salmah Md. Rawi ◽  
Suhaila Abdul Hamid ◽  
Salman Abdo Al-Shami
Keyword(s):  
Stable Isotopes ◽  
Trophic Position ◽  
Food Sources ◽  
Nitrogen Stable Isotopes ◽  
Carbon And Nitrogen ◽  
Highland Streams

Stable Isotopes and Parasites Indicate Feeding Ecology in Florida, USA, Wading Birds

Waterbirds ◽  
2021 ◽  
Vol 43 (3-4) ◽  
Author(s):  
Sarah E. Gumbleton ◽  
David W. Kerstetter ◽  
Christopher A. Blanar ◽  
Amy C. Hirons
Keyword(s):  
Stable Isotopes ◽  
Feeding Ecology ◽  
Wading Birds

Feeding ecology of free-living nematodes.

2021 ◽  
pp. 185-215
Author(s):  
Nabil Majdi ◽  
Tom Moens ◽  
Walter Traunspurger
Keyword(s):  
Feeding Ecology ◽  
Trophic Interactions ◽  
Feeding Habits ◽  
Food Sources ◽  
Environmental Constraints ◽  
Feeding Rates ◽  
Feeding Selectivity ◽  
Free Living ◽  
Aquatic Nematodes ◽  
Food Recognition

Abstract This chapter provides overview of the feeding habits and food sources of aquatic nematodes. The environmental constraints on feeding, food recognition, and feeding selectivity are also addressed, together with the complex, indirect trophic interactions between nematodes and their microbial prey. To raise awareness of the inherent methodological and/or interpretational problems in studies of nematode feeding ecology, the chapter ends with a brief look at the methods that have been adapted to quantify feeding rates in nematodes.

Investigating food assimilation in a carnivorous teleost by stable isotopes analysis: the case of ribbonfish off south-east Brazil

2020 ◽  
Vol 100 (3) ◽  
pp. 445-451
Author(s):  
Ana Paula Madeira Di Beneditto ◽  
Pedro Viana Gatts ◽  
Vanessa Trindade Bittar
Keyword(s):  
Stable Isotopes ◽  
Coastal Waters ◽  
Food Sources ◽  
Commercial Fisheries ◽  
Target Species ◽  
Main Food ◽  
Adult Females ◽  
Trichiurus Lepturus ◽  
Credible Intervals ◽  
Food Assimilation

AbstractThis study verifies the food assimilation of a carnivorous teleost in different timescales (weeks vs months) and evaluates how it uses the food sources. The target species is the adult ribbonfish, Trichiurus lepturus, a voracious teleost caught in commercial fisheries off south-east Brazil (21°S–22°S). The isotope models indicated Chirocentrodon bleekerianus as the main food in the ribbonfish diet in the last weeks (liver: 38.5%; 95% credible intervals: 3.4–73.9%) and last months (muscle: 36.2%; 95% credible intervals: 3.4–68.7%). The contribution of other food sources ranges from 10–16% (liver) and from 10–20% (muscle). Food assimilation remains similar at different timescales. The isotope models suggested a strong and long-lasting association of the adult females of ribbonfish with coastal waters along the study area.

The monogenean Paradiplozoon ichthyoxanthon behaves like a micropredator on two of its hosts, as indicated by stable isotopes

2018 ◽  
Vol 93 (1) ◽  
pp. 71-75 ◽  
Author(s):  
B. Sures ◽  
M. Nachev ◽  
B.M. Gilbert ◽  
Q.M. Dos Santos ◽  
M.A. Jochmann ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Trophic Level ◽  
Trophic Interactions ◽  
Carbon Sources ◽  
Food Sources ◽  
Carbon And Nitrogen ◽  
Blood Sucking ◽  
Vaal Dam ◽  
Living Organisms ◽  
Host Fishes

AbstractThe analysis of stable isotopes of carbon and nitrogen has been used as a fingerprint for understanding the trophic interactions of organisms. Most of these studies have been applied to free-living organisms, while parasites have largely been neglected. Studies dealing with parasites so far have assessed the carbon and nitrogen signatures in endoparasites or ectoparasites of different hosts, without showing general trends concerning the nutritional relationships within host–parasite associations. Moreover, in most cases such systems involved a single host and parasite species. The present study is therefore the first to detail the trophic interactions of a freshwater monogenean–host model using δ13C and δ15N, where a single monogenean species infects two distinctly different hosts. Host fishes, Labeobarbus aeneus and Labeobarbus kimberleyensis from the Vaal Dam, South Africa, were assessed for the monogenean parasite Paradiplozoon ichthyoxanthon, individuals of which were removed from the gills of the hosts. The parasites and host muscle samples were analysed for signatures of δ13C and δ15N using an elemental analyser connected to an isotope ratio mass spectrometer. Host fish appear to use partly different food sources, with L. aeneus having slightly elevated δ13C signatures compared to L. kimberleyensis, and showed only small differences with regard to their nitrogen signatures, suggesting that both species range on the same trophic level. Carbon and nitrogen signatures in P. ichthyoxanthon showed that the parasites mirrored the small differences in dietary carbon sources of the host but, according to δ15N signatures, the parasite ranged on a higher trophic level than the hosts. This relationship resembles predator–prey relationships and therefore suggests that P. ichthyoxanthon might act as a micropredator, similar to blood-sucking arthropods such as mites and fleas.

Feeding Ecology of Age‐0 Gar at Texoma Reservoir Inferred from Analysis of Stable Isotopes

2020 ◽  
Vol 40 (3) ◽  
pp. 638-650 ◽  
Author(s):  
Richard A. Snow ◽  
David R. Stewart ◽  
Michael J. Porta ◽  
James M. Long
Keyword(s):  
Stable Isotopes ◽  
Feeding Ecology
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