scholarly journals Trophic niche overlap between round sardinella ( Sardinella aurita ) and sympatric pelagic fish species in the Western Mediterranean

2021 ◽  
Author(s):  
Eneko Bachiller ◽  
Joan Giménez ◽  
Marta Albo‐Puigserver ◽  
Maria Grazia Pennino ◽  
Neus Marí‐Mena ◽  
...  
Keyword(s):  
Fish Species ◽  
Niche Overlap ◽  
Western Mediterranean ◽  
Pelagic Fish ◽  
Trophic Niche ◽  
Sardinella Aurita

Sea warming and fish distribution: the case of the small pelagic fish, Sardinella aurita , in the western Mediterranean

2006 ◽  
Vol 12 (11) ◽  
pp. 2209-2219 ◽  
Author(s):  
ANA SABATÉS ◽  
PALOMA MARTÍN ◽  
JOSEP LLORET ◽  
VANESA RAYA
Keyword(s):  
Western Mediterranean ◽  
Pelagic Fish ◽  
Fish Distribution ◽  
Small Pelagic Fish ◽  
Sardinella Aurita ◽  
Sea Warming

scholarly journals Changes in trophic characteristics of two fish species of Astyanax (Teleostei: Characidae) in response to aquatic pollution

2019 ◽  
Vol 36 ◽  
pp. 1-12 ◽  
Author(s):  
Mirella B. Alonso ◽  
Débora R. de Carvalho ◽  
Carlos B. M. Alves ◽  
Marcelo Z. Moreira ◽  
Paulo S. Pompeu
Keyword(s):  
Isotopic Composition ◽  
Fish Species ◽  
Environmental Changes ◽  
Stomach Contents ◽  
Niche Overlap ◽  
Trophic Niche ◽  
Metropolitan Region ◽  
Trophic Plasticity ◽  
Polluted Sites ◽  
Belo Horizonte

The trophic plasticity of most fish species of Astyanax Baird & Girard, 1854 in response to environmental changes and resource availability is high. This work evaluates the differences in the trophic characteristics of two congeneric species, Astyanaxtaeniatus (Jenyns, 1842) and Astyanaxlacustris (Lütken, 1875), in Rio das Velhas Basin, which is highly impacted by the discharge of sewage from the Metropolitan Region of Belo Horizonte (MRBH). Eight sites were sampled and grouped into three regions: upper course (two sites upstream of the MRBH); middle course (three sites located in the middle portion of the Rio das Velhas, region with greater influence of the MRBH), and lower course (three sites downstream of the MRBH). Samples of fish and food resources were collected from all sites to obtain the isotopic composition of nitrogen (δ15N) and carbon (δ13C), and the stomach contents of the two species was analized. The most common items in the stomach of A.lacustris and A.taeniatus, respectively, were from plants and insects, followed by algae/periphyton (especially at the low course of Rio das Velhas). In contrast, stable isotope analyses indicated that algae (in polluted sites) and periphyton (in least-disturbed sites) were best assimilated both species. Both analyses indicated that the trophic niches of the two species overlap more in more polluted sites relative to less polluted sites. Astyanaxtaeniatus and A.lacustris only presented different isotopic composition of carbon and nitrogen in the upper course of the Rio das Velhas, probably in response to the greater diversity of food items consumed by each species. In the other regions, the species presented similar isotopic signatures, with δ15N and δ13C notably enriched in the most polluted regions (middle and low course). Our results suggest that pollution acts by increasing trophic niche overlap of these species, altering the type of resources most assimilated, and promoting a greater enrichment of δ15N in fish and resources.

scholarly journals Ekologi trofik komunitas ikan di Sungai Nimbai: Interaksi kompetisi dan pemangsaan terhadap ikan pelangi arfak, Melanotaenia arfakensis Allen, 1990

2019 ◽  
Vol 19 (3) ◽  
pp. 449
Author(s):  
Emmanuel Manangkalangi ◽  
M. Fadjar Rahardjo ◽  
Renny K Hadiaty ◽  
Sigid Hariyadi ◽  
Charles P. H. Simanjuntak
Keyword(s):  
Fish Species ◽  
Trophic Ecology ◽  
Anthropogenic Activities ◽  
River System ◽  
Niche Overlap ◽  
Trophic Niche ◽  
Native Fish ◽  
Fish Samples ◽  
Alien Fish ◽  
Alien Fish Species

Information on trophic ecology can provide an understanding of the functional role of fish in an ecosystem, including endemic and native fish groups, as well as alien fish that are introduced through anthropogenic activities. The research on the trophic ecology of the fish community in the Nimbai Stream, Prafi River system, is intended to describe the interaction of competition and predation, especially towards endemic fish, Melanotaenia arfakensis. Fish samples were collected monthly from four habitat types, i.e., slow littoral, medium littoral, pool, and run from May 2016 to April 2017. A combination of an electric shocker and a hand net was used to collect fish samples. A total of 16 fish species were collected, consists of one endemic species, namely M. arfakensis, nine species of native fish, and six species of alien fish. The Arfak rainbowfish and three native fish species were categorized as insectivorous, four native fish species as herbivorous, and two other fishes as carnivorous. Three alien fish species also belong to insectivorous, two alien fish species as carnivorous, and one species as herbivorous. The niche breadth of fish communities ranges from 0.071 to 0.857. The trophic niche overlap between the Arfak rainbowfish and three native fish species and three alien fish species was recorded. The results of this study indicate a potential competition and predation interactions between Arfak rainbowfish and native fish as well as with alien fish species. Therefore, introducing alien fish into Prafi River system will disrupt Arfak rainbowfish population.

The diet and consumption of dominant fish species in the upper Scheldt estuary, Belgium

2003 ◽  
Vol 83 (3) ◽  
pp. 603-612 ◽  
Author(s):  
Joachim Maes ◽  
Loreto de Brabandere ◽  
Frans Ollevier ◽  
Jan Mees
Keyword(s):  
Fish Species ◽  
Fish Assemblage ◽  
Cooling Water ◽  
Dry Weight ◽  
Niche Overlap ◽  
Trophic Niche ◽  
Scheldt Estuary ◽  
Calanoid Copepods ◽  
Salinity Zone ◽  
Dominant Fish

Seasonal changes in the diet composition and trophic niche overlap were examined for the dominant members of the fish assemblage of the turbid low-salinity zone of the Scheldt estuary (Belgium). Samples of fish were taken in the cooling water of a power plant. Juveniles of eight species dominated the fish assemblage: two goby species, herring, sprat, bass, flounder, eel and pikeperch. Together, they had preyed upon 31 different prey taxa. Calanoid copepods and hyperbenthic mysids were the most important prey items with macrobenthic invertebrates being largely ignored. Pair-wise comparisons of trophic niche overlap showed that, in general, niche overlap between individuals of the same species was significantly higher than overlap between individuals from different species, suggesting that the available food resources were partitioned. The total annual prey consumption by the dominant fish species was estimated at 610 mg ash-free dry weight m−3.

Habitat suitability modelling for a key small pelagic fish species (Sardinella aurita) in the central Mediterranean sea

Hydrobiologia ◽  
2017 ◽  
Vol 821 (1) ◽  
pp. 83-98 ◽  
Author(s):  
S. Zgozi ◽  
M. Barra ◽  
G. Basilone ◽  
M. Hamza ◽  
M. Assughayer ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Fish Species ◽  
Habitat Suitability ◽  
Pelagic Fish ◽  
Central Mediterranean ◽  
Small Pelagic Fish ◽  
Central Mediterranean Sea ◽  
Habitat Suitability Modelling ◽  
Sardinella Aurita

Low individual diet variation and high trophic niche overlap between the native polecat and invasive American mink

2021 ◽  
Author(s):  
A. Zalewski ◽  
M. Szymura ◽  
R. Kowalczyk ◽  
M. Brzeziński
Keyword(s):  
American Mink ◽  
Niche Overlap ◽  
Trophic Niche ◽  
Diet Variation

scholarly journals The food web in a subterranean ecosystem is driven by intraguild predation

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Andrea Parimuchová ◽  
Lenka Petráková Dušátková ◽  
Ľubomír Kováč ◽  
Táňa Macháčková ◽  
Ondřej Slabý ◽  
...  
Keyword(s):  
Food Web ◽  
Trophic Interactions ◽  
Intraguild Predation ◽  
Linear Models ◽  
Niche Overlap ◽  
Trophic Niche ◽  
High Availability ◽  
Large Prey ◽  
Arthropod Predators ◽  
Body Sizes

AbstractTrophic interactions of cave arthropods have been understudied. We used molecular methods (NGS) to decipher the food web in the subterranean ecosystem of the Ardovská Cave (Western Carpathians, Slovakia). We collected five arthropod predators of the species Parasitus loricatus (gamasid mites), Eukoenenia spelaea (palpigrades), Quedius mesomelinus (beetles), and Porrhomma profundum and Centromerus cavernarum (both spiders) and prey belonging to several orders. Various arthropod orders were exploited as prey, and trophic interactions differed among the predators. Linear models were used to compare absolute and relative prey body sizes among the predators. Quedius exploited relatively small prey, while Eukoenenia and Parasitus fed on relatively large prey. Exploitation of eggs or cadavers is discussed. In contrast to previous studies, Eukoenenia was found to be carnivorous. A high proportion of intraguild predation was found in all predators. Intraspecific consumption (most likely cannibalism) was detected only in mites and beetles. Using Pianka’s index, the highest trophic niche overlaps were found between Porrhomma and Parasitus and between Centromerus and Eukoenenia, while the lowest niche overlap was found between Parasitus and Quedius. Contrary to what we expected, the high availability of Diptera and Isopoda as a potential prey in the studied system was not corroborated. Our work demonstrates that intraguild diet plays an important role in predators occupying subterranean ecosystems.

A new look on the morphometric characteristics of Congridae leptocephali from the southern Adriatic Sea

2021 ◽  
pp. 1-5
Author(s):  
M. Mandić ◽  
I. Leonori ◽  
A. De Felice ◽  
S. Gvozdenović ◽  
A. Pešić
Keyword(s):  
Fish Species ◽  
Adriatic Sea ◽  
Pelagic Fish ◽  
Morphometric Parameters ◽  
Morphological Features ◽  
Morphometric Characteristics ◽  
Small Pelagic Fish ◽  
Acoustic Surveys ◽  
Western Side ◽  
Conger Conger

Abstract Anguillid leptocephali of three Congridae species (Conger conger, Ariosoma balearicum and Gnathophis mistax) were caught as bycatch of pelagic trawls during acoustic surveys targeting small pelagic fish species in the southern Adriatic Sea, carried out under the framework of the Italian MEDIAS project (western side) and its extension in the ambit of the FAO AdriaMed project (eastern side). Results refer to the findings of Congridae leptocephali during surveys conducted in 2011, 2014, 2015 and 2016. A total of 25 specimens were caught and analysed (morphological features and pigmentation patterns). Leptocephali of Conger conger were found in the range of 8.4–13.1 cm total length (TL) (between 50 and 132 m depth), Ariosoma balearicum from 9.7–12.2 cm TL (between 50 and 128 m depth) and for Gnathophis mystax in the range from 6.4–11.7 cm TL (between 40 and 79 m depth). The results indicate that the southern Adriatic Pit could be the spawning area of these species in the Adriatic Sea. Present data represent a contribution to existing knowledge about the ecology of leptocephali from the Congridae family in the southern Adriatic Sea, and also indicate the existence of differences in morphometric parameters between different areas, that is, the possibility of the existence of new geographic lines within the genus Ariosoma in the Adriatic Sea.

Trophic niche overlap between native freshwater mussels (Order: Unionida) and the invasive Corbicula fluminea

2021 ◽  
Author(s):  
Vanessa Modesto ◽  
Ester Dias ◽  
Martina Ilarri ◽  
Manuel Lopes‐Lima ◽  
Amílcar Teixeira ◽  
...  
Keyword(s):  
Freshwater Mussels ◽  
Corbicula Fluminea ◽  
Niche Overlap ◽  
Trophic Niche
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