Feeding habits and seasonal trophic guilds structuring fish community in the bay mouth region of a tropical estuarine habitat

2021 ◽  
Author(s):  
Kay Khine Soe ◽  
Siriporn Pradit ◽  
Sukree Hajisamae
Keyword(s):  
Fish Community ◽  
Feeding Habits ◽  
Trophic Guilds ◽  
Estuarine Habitat ◽  
Mouth Region ◽  
Tropical Estuarine

scholarly journals Hábitos alimentarios de quironómidos (Diptera: Chironomidae) en lagos del páramo de Chingaza, Colombia

2017 ◽  
Vol 66 (1) ◽  
pp. 136 ◽  
Author(s):  
Yulibey Caleño Ruiz ◽  
Carlos Alberto Rivera Rondon ◽  
Hernando Ovalle
Keyword(s):  
Dietary Habits ◽  
Feeding Habits ◽  
Diet Overlap ◽  
Gut Contents ◽  
High Mountain ◽  
Trophic Guilds ◽  
Use Of Resources ◽  
Fine Particulate ◽  
Chironomidae Larvae ◽  
Well Differentiated

Tropical high mountain lakes show unique environmental conditions where chironomids play an important role in ecosystem functioning. The characteristics of these environments could favor diet overlap and therefore a high interspecific competition. This study described the dietary habits of chironomid genera, identified whether the dietary habits were specialized or generalist, and analyzed the diet overlap in the genera. Chironomidae larvae were collected from four lakes of the Chingaza paramo during the dry season, between April and May of 2 016. The feeding habits of larvae were evaluated by analyzing gut contents following standard methods. Each genus was assigned to trophic guilds (carnivore, detritivore and algivore) and the diet overlap was estimated using the Pinka's index. A total of 1 003 individuals were collected and nine genera were identified. Larvae consumed mainly fine particulate organic matter (FPOM), algae, macrophyte fragments, macroinvertebrates, and animal tissues. FPOM was the main feeding resource of detritivores. The analysis of diets showed a high affinity of each genus for a single trophic guild and most of the genera were generalist in the use of resources. For all lakes, high levels of diet overlap were observed among genera and trophic guilds, mainly among detritivores. Our results suggested that Chironomidae larvae of these lakes presented well differentiated trophic habits, and showed a moderate diet overlap within detritivores and carnivores.

Diel and seasonal variability in the fish community structure of a mud-bottom estuarine habitat in the Gulf of Mexico

2010 ◽  
Vol 31 (4) ◽  
pp. 633-642 ◽  
Author(s):  
Manuel Castillo-Rivera ◽  
Rocío Zárate-Hernández ◽  
Selene Ortiz-Burgos ◽  
José Zavala-Hurtado
Keyword(s):  
Community Structure ◽  
Gulf Of Mexico ◽  
Seasonal Variability ◽  
Fish Community ◽  
Fish Community Structure ◽  
Estuarine Habitat

scholarly journals Diets and trophic guilds of aquatic insects in Molino River, La Guajira, Colombia

2016 ◽  
Vol 75 (s1) ◽  
Author(s):  
Cristian Granados-Martínez ◽  
Bladimir Zúñiga-Céspedes ◽  
Julio Acuña-Vargas
Keyword(s):  
Organic Matter ◽  
Aquatic Insects ◽  
Feeding Habits ◽  
Neotropical Region ◽  
Trophic Guilds ◽  
Top Predators ◽  
Temperate Streams ◽  
Neotropical Streams ◽  
Basal Resources ◽  
First Time

Aquatic insects are considered a key component for stream food webs because of their contribution to the flow of energy from basal resources to the top predators. For this reason, the study of trophic guilds on aquatic insects is necessary to understand the transformation of energy and matter in stream ecosystems. The study of trophic guilds on aquatic insects has been widely documented in temperate streams. In contrast, little is known about feeding habits and trophic guilds in Neotropical streams. However, several lines of evidence indicate that aquatic insects in the Neotropical region are generally omnivores and that the Fine Particulate Organic Matter (FPOM) is the main food item. To test this hypothesis, we analyzed the diets and the trophic guilds of aquatic insects in an unexplored region of northern Colombia (Molino River, La Guajira). Aquatic insects were sampled using a Surber net, covering the different kind of substrates over a 100 m reach. Samples were sorted and identified to the lowest taxonomic level possible. We analyzed 250 guts of aquatic insects belonging to six orders, nine families, and 10 genera (<em>Leptonema</em>, <em>Chimarra</em>, <em>Anacroneuria</em>, <em>Nectopsyche</em>, <em>Tabanus</em>, <em>Simulium</em>, <em>Pseudodisersus</em>, <em>Corydalus</em>, <em>Camelobaetidius</em>, and <em>Baetodes</em>). We found that FPOM, algae, and animal tissue were the most important food items in the gut content of the aquatic insects at the Molino River. Our results suggest that aquatic insects in the Molino River are generally detritivores, highlighting the importance of the dead organic matter in Neotropical streams. We reported -for the first time- the trophic guilds of the genera <em>Nectopsyche </em>and <em>Pseudodisersus</em>,<em> </em>which were categorized as herbivorous. Our results suggest that aquatic insects in the Molino River exploit a variety of food resources and emphasize the importance of the study of feeding habits on aquatic insects in unexplored Neotropical streams.

scholarly journals Convergent responses of fish belonging to different feeding guilds to sewage pollution

2020 ◽  
Vol 18 (1) ◽  
Author(s):  
Marina Rodrigues do Prado ◽  
Débora Reis de Carvalho ◽  
Carlos Bernardo Mascarenhas Alves ◽  
Marcelo Zacharias Moreira ◽  
Paulo Santos Pompeu
Keyword(s):  
Feeding Habits ◽  
Fish Tissue ◽  
Metropolitan Region ◽  
Feeding Guilds ◽  
Isotopic Niche ◽  
Trophic Guilds ◽  
Trophic Plasticity ◽  
Polluted Sites ◽  
Belo Horizonte ◽  
Industrial Sewage

ABSTRACT This study aimed to evaluate if the presence of pollutants promotes changes in feeding habits of fish species from different trophic guilds: the detritivorous species, Hypostomus francisci, and the piscivorous, Hoplias intermedius. Both species were sampled at 12 sites (with different degrees of pollution) in the Rio das Velhas basin, which is heavily polluted by domestic and industrial sewage from the Metropolitan Region of Belo Horizonte (MRBH). Stable isotope analyses of carbon (δ13C) and nitrogen (δ15N) of fish tissue and the main food resources were performed. Fishes from both trophic guilds altered their diets in degraded environments, but the detritivorous species showed greater trophic plasticity. The isotopic niche of both trophic guilds was broadest in unpolluted sites and more δ15N enriched in polluted regions. The detritivorous species presented high niche-breadth in unpolluted sites, probably due to the greater variety of resources consumed. In addition, the δ15N of the detritivorous was more enriched than the piscivorous species in polluted sites. In conclusion, fishes from both trophic guilds presented similar isotopic responses to environmental pollution. However, the detritivorous species was more sensitive to these alterations and therefore, is likely a better indicator of environmental condition than the piscivorous.

Dominant species drive seasonal dynamics of the fish community in the Min estuary, China

2020 ◽  
Vol 49 (1) ◽  
pp. 34-48 ◽  
Author(s):  
Jun Li ◽  
Bin Kang
Keyword(s):  
Dominant Species ◽  
Fish Community ◽  
Feeding Habits ◽  
Habitat Preferences ◽  
Niche Overlap ◽  
Fishery Resources ◽  
Use Of Resources ◽  
Full Explanation ◽  
Quantitative Analyses ◽  
Effective Conservation

AbstractFishery resources are currently facing multiple stresses such as overfishing, pollution and climate change. Looking into processes and mechanisms of the dynamic fish community through detailed quantitative analyses contributes to effective conservation and management of fishery resources. The Min estuary plays an important role in maintaining fisheries in southeastern coastal China, therefore the fish community in the brackish area was investigated and analyzed in this study. A total of 127 species belonging to 91 genera, 49 families and 14 orders were sampled in 2015. Eight indices reflecting four aspects of fish communities were determined, i.e. species richness, species evenness, heterogeneity and taxonomy. Differences between the indices were nonsignificant, suggesting that the use of a single diversity descriptor could not provide a full explanation. Nine dominant species in the Min estuary showed seasonal turnover by rational use of resources and co-occurring species showed correspondingly adequate habitat preferences and feeding habits to avoid competition. The species Harpadon nehereus occurred as the dominant species in three seasons except spring. High values of niche overlap among common or rare species and lower values of niche overlap among all dominant species effectively brought the diversity of the fish community into a state of equilibrium.

The Role of Fishes in the Regulation of Phosphorus Availability in Lakes

1980 ◽  
Vol 37 (10) ◽  
pp. 1540-1549 ◽  
Author(s):  
Brian S. Nakashima ◽  
William C. Leggett
Keyword(s):  
Total Phosphorus ◽  
Yellow Perch ◽  
Fish Community ◽  
Nutrient Dynamics ◽  
Feeding Habits ◽  
Nutrient Release ◽  
Open Water ◽  
Fish Tissue ◽  
Fecal Phosphorus

Several hypotheses concerning the contribution of fishes to nutrient dynamics in lakes were examined. The maximum quantity of excreted phosphorus by fishes was found to be negligible (< 0.33%) when compared to the demand for this element by the seston. Zooplankton (cladocerans and copepods) excretion supplied up to 12% of the daily summer orthophosphate requirements of the seston. The pool of total phosphorus present in the open water fish community was approximately equivalent to that present in the seston while the total phosphorus biomass in zooplankton was only 22 to 40% of that in the seston. Daily incorporation of total phosphorus into fish tissue and losses as fecal phosphorus could constitute up to 40% of total phosphorus in the seston lost due to sedimentation from the epilimnion depending on the feeding habits of the dominant fish species. Nutrient release due to the decomposition of fish carcasses supplied up to 20% of the allochthonous phosphorus entering the south basin in the spring. The prey of the adult fish community is predominantly benthic and littoral in origin. However, the role of predation in structuring benthic and littoral prey populations and its effect on nutrient dynamics is unknown.Key words: budget, excretion, Lake Memphremagog, nutrients, Perca flavescens, yellow perch; phosphorus, population estimate

scholarly journals KAJIAN AREA BANGUNAN BREAKWATER TERHADAP TEMPAT LINDUNG SPESIES IKAN DI PANTAI MATRAS KABUPATEN BANGKA

2020 ◽  
Vol 14 (1) ◽  
pp. 1-8
Author(s):  
Ripani Gautama Gautama ◽  
Okto Supratman ◽  
Siti Aisyah
Keyword(s):  
Fish Species ◽  
Fish Community ◽  
Sea Water ◽  
Eating Habits ◽  
Feeding Habits ◽  
Fish Community Structure ◽  
Dominance Index ◽  
Visual Census ◽  
The Family ◽  
Category Type

Alleged links Breakwater Beach area of ​​the building as a shelter Matras fish are lots of cracks and cavities of a pile of stones that are still submerged in sea water can be overgrown with algae and the coral recruitment and attended alge fish species and fish-eating predators. This study aims to assess the area of ​​the building Breakwater of the area protected fish species, determine the species composition, abundance of fish by category type and feeding habits of fish and fish community structure which was implemented in April 2019 in the area of ​​the building Breakwater and Non Breakwater in Matras Beach Bangka. The method uses a combination of visual census and gill nets to take fish of data. The results of the study recorded the number of individual fish in the area as many as 3741 individual Breakwater building consists of 22 species from 14 families and Non Breakwater much as one individual, namely the species  Carangoides plagioenia of the family Carangidae, Category types and feeding habits of the fish in the area at the Beach breakwater buildings consist of 14 species of fish targets and 8 major fish species, while the eating habits of the fish listed nine types of herbivorous fish species, 11 types of carnivorous fish species, two species of omnivorous fish types. Fish ecology index showed an unstable community with dominance index which tends to be low and fish species are spread relatively evenly and Non Breakwater showed that depressed communities with dominance index tends to be high and fish species are not evenly distributed.

scholarly journals Diet and trophic structure of the fish fauna in a subtropical ecosystem: impoundment effects

2013 ◽  
Vol 11 (4) ◽  
pp. 891-904 ◽  
Author(s):  
Rosilene Luciana Delariva ◽  
Norma Segatti Hahn ◽  
Elaine Antoniassi Luiz Kashiwaqui
Keyword(s):  
Trophic Structure ◽  
Feeding Habits ◽  
Spatial Scales ◽  
Fish Fauna ◽  
Stomach Contents ◽  
Trophic Guilds ◽  
Before And After ◽  
Temporal And Spatial ◽  
Nmds Analysis ◽  
Iguaçu River

This study examined the diet and trophic structure of the fish fauna, over temporal and spatial scales, as affected by the impoundment of the Iguaçu River in the region of Salto Caxias, Paraná State, Brazil. Sampling was conducted before (March 1997 - February 1998) and after the impoundment (March 1999 - February 2000), at four sampling sites. The stomach contents were analyzed by the volumetric method. The species could be organized in 10 trophic guilds: algivores, carcinophages, detritivores, herbivores, aquatic insectivores, terrestrial insectivores, invertivores, omnivores, piscivores, and planktivores; the first and last guilds were represented only in the post-impoundment period. Similarity patterns and feeding changes were summarized by a non-metric Multi-dimensional Scaling (nMDS) analysis and statistically tested by a Permutational multivariate analysis of variance (PERMANOVA). Most species showed feeding changes, except for the piscivores and detritivores. These changes were related to the temporal factor (impoundment phases), such as reduced intake of benthic organisms and allochthonous food, which were usually replaced by resources from the reservoir itself (algae, microcrustaceans, and fish), simplifying the food spectrum of the fish fauna. A different indicator of food resources (IndVal) corroborated these changes in the feeding of the species. The proportions of the trophic guilds evaluated based on the catch per unit of effort (CPUE) and tested by ANOSIM were significantly different before and after the impoundment. Herbivores and piscivores were the guilds that contributed (SIMPER) to these differences, especially the high increase in biomass of the piscivore guild after the impoundment. Variations in the abundance of trophic guilds were more directly related to changes in the feeding habits of the fish fauna than to increases in the number and biomass of the species that constitute these guilds.

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