Food items and feeding habits of two Nothobranchiidae, Epiplatys chaperi sheljuzhkoi (poll, 1953) and Nimbapanchax petersi (sauvage, 1882) in Banco river, Côte d’ivoire

2021 ◽  
Vol 29 (2) ◽  
pp. 69-85
Author(s):  
D.A Kouamé Ouanko ◽  
Y.A Konan ◽  
T.M Kamelan ◽  
B.G Gooré ◽  
Z.M Gogbé
Keyword(s):  
Feeding Habits ◽  
Aquatic Insect ◽  
Stomach Contents ◽  
Canopy Cover ◽  
Small Range ◽  
Insect Larvae ◽  
Chi Square ◽  
Food Items ◽  
Terrestrial Insects ◽  
Aquatic Insect Larvae

Food and feeding habits of two Nothobranchiidae species, Epiplatys chaperi sheljuzhkoi (Poll, 1953) and Nimbapanchax petersi (Sauvage, 1882) from Banco River were investigated between January and December 2016. Stomach contents of 119 and 397 individuals of E. sheljuzhkoi and N. petersi were respectively analyzed, ranging in size from 13 and 55 mm, 11 and 48 mm standard Length, respectively. Formicidae being terrestrial insects, constituted the main prey (RI>50) of both species, and aquatic insect larvae (Hydrophilidae and Chironomidae) were secondary or accessory preys. The food items in stomach showed a small spectrum in E. sheljuzhkoi than N. petersi but differences were not significant (Chi-square, p>0.05). Diet composition of both species showed little variation according to seasons, sampling zones and size groups (Anova, p>0.05). However, a decreasing trend in terrestrial insects and an increase of other preys in stomach contents has been observed from upstream to downstream. For ontogenic variation, large specimens group fed much more on aquatic insect larvae, fish scales and macrophytes than small size group. This work indicated that both species fed on a small range of prey items dominated by insects in Banco River and could be considered strict insectivorous predators. This work concludes that both species have similar diets and the canopy cover of Banco forest plays an important role in the feeding and conservation of these species. Key words: Epiplatys, Nimbapanchax, canopy cover, diet, terrestrial insects, Formicidae, predator.

scholarly journals Feeding ecology of Phalloceros anisophallos (Osteichthyes: Cyprinodontiformes) from Andorinha Stream, Ilha Grande, Brazil

2010 ◽  
Vol 8 (1) ◽  
pp. 179-182 ◽  
Author(s):  
Rosana Mazzoni ◽  
Raphaella Rangel da Silva Araújo ◽  
Gardênia Carolina Tosta dos Santos ◽  
Ricardo Iglesias-Rios
Keyword(s):  
Feeding Habits ◽  
Aquatic Insect ◽  
Ontogenetic Variation ◽  
Relative Importance ◽  
Insect Larvae ◽  
Food Category ◽  
Food Items ◽  
Dry Seasons ◽  
Terrestrial Insects ◽  
Aquatic Insect Larvae

In the present work, we determined the relative importance of allochthonous and autochthonous food items as well as seasonal and ontogenetic variation in the feeding habits of Phalloceros anisophallos from córrego Andorinha, Ilha Grande. Quantitative analysis, based on alimentary index (IAi) and food volume (Vo), revealed that P. anisophallos fed on detritus, autochthonous algae (diatoms, unicellular and filamentous Chlorophyceae algae), autochthonous animals (aquatic insect larvae: Trichoptera, Chironomidae and other Diptera) and allochthonous animals (terrestrial insects: Hymenoptera). Ontogenetic variations were recorded for the consumption of each food category. Adults used a larger amount of algae and detritus, and juveniles used a higher amount of animal items. Significant differences in intestinal coefficient between adult and juvenile individuals corroborated the ontogenetic differences in feeding behavior. IAi values of each consumed food category did not vary between the rainy and dry seasons, but mean detritus Vo differed between seasons and was significantly (Anova, p<0.01) greater during the dry season.

A note on the food of the Australian grayling, Prototroctes maraena Gunther (Galaxioidei: Prototroctidae)

1976 ◽  
Vol 27 (3) ◽  
pp. 525 ◽  
Author(s):  
PD Jackson
Keyword(s):  
Plant Material ◽  
Aquatic Insect ◽  
Stomach Contents ◽  
Insect Larvae ◽  
Australian Grayling ◽  
Aquatic Insect Larvae

The stomach contents of 22 specimens of the Australian grayling, P. maraena, from the Mitchell River in eastern Victoria were examined. Aquatic insect larvae were predominant; only small amounts of plant material were present. The grayling, like other salmoniforms, is mainly insectivorous.

scholarly journals Feeding habits of Thoracocharax stellatus (Characiformes: Gasteropelecidae) in the upper rio Tocantins, Brazil

2007 ◽  
Vol 5 (1) ◽  
pp. 69-74 ◽  
Author(s):  
André L. Netto-Ferreira ◽  
Míriam P. Albrecht ◽  
Jorge L. Nessimian ◽  
Érica P. Caramaschi
Keyword(s):  
Fish Species ◽  
Riparian Vegetation ◽  
Feeding Habits ◽  
Stomach Contents ◽  
Foraging Activity ◽  
River Bank ◽  
Food Items ◽  
Hydroelectric Dam ◽  
Terrestrial Insects ◽  
Land Water

The silver hatchetfish Thoracocharax stellatus is one of the approximately 200 fish species recorded for the upper rio Tocantins, in the region where it was impounded by the Serra da Mesa hydroelectric dam. Analysis of the stomach contents of 88 specimens revealed a diet consisting almost entirely of insects (99.6%), most of which were terrestrial (87.6%). Ants, beetles, and mayflies were the main food items. Dawn and dusk seemed to be the periods of highest foraging activity for T. stellatus. As a specialist on terrestrial insects, this species has a close connection with the region near the river bank, where prey is provided from the associated riparian vegetation. Despite the impoundment and depletion of the land-water ecotone observed in later stages of reservoir formation, no significant changes in the diet of the few remnant specimens were recorded, which seems to indicate little feeding flexibility. Thus, feeding seemed to be an overriding factor for the displacement of this species after river impoundment.

scholarly journals Testing the ecomorphological hypothesis in a headwater riffles fish assemblage of the rio São Francisco, southeastern Brazil

2006 ◽  
Vol 4 (2) ◽  
pp. 203-214 ◽  
Author(s):  
Lilian Casatti ◽  
Ricardo M. C. Castro
Keyword(s):  
Fish Species ◽  
Feeding Habits ◽  
Aquatic Insect ◽  
Southeastern Brazil ◽  
Insect Larvae ◽  
Ecological Data ◽  
Benthic Species ◽  
Pectoral Fins ◽  
Species Groups ◽  
Aquatic Insect Larvae

The ecomorphology of 14 fish species resident in a headwater riffles area of the São Francisco river, southeastern Brasil, was analyzed and combined with diet and feeding behavior data, previously obtained by us. The three larger species groups formed in the ecomorphological analysis were found to reflect primarily microhabitat occupation in the following manner: a) nektonic characids with compressed bodies, lateral eyes and lateral pectoral fins, with diurnal and opportunistic feeding habits (Astyanax rivularis, Bryconamericus stramineus, and Bryconamericus sp.); b) nektobenthic characiforms and siluriforms with fusiform bodies and expanded pectoral fins, including sit-and-wait characidiins, predators of aquatic insect larvae (Characidium fasciatum and Ch.zebra), as well as the algae grazing parodontids (Apareiodon ibitiensis and Parodon hilarii), and also the heptapterid and trichomycterid catfishes that practice substrate speculation and feed on benthic aquatic insect larvae (Cetopsorhamdia iheringi, Imparfinis minutus, Rhamdia quelen, and Trichomycterus sp.); c) benthic species with depressed bodies, suctorial oral discs, dorsal eyes, and horizontal pectoral fins, represented by the periphytivorous loricariid catfishes (Hisonotus sp., Harttia sp., and Hypostomus garmani). Correlation between diet and general morphology was not significant in our analysis, unless when the analyzed set included only nektonic and benthic species, indicating that the lack of correlation between these factors is most pronounced in the group of nektobenthic species. The unequivocal case of morphological convergence found between the nektobenthic Characidiinae and Parodontidae is a clear example of the integration between phylogenetic information and ecomorphology, and provides a way to objectively identify cases of morphological and adaptive convergence and divergence. Furthermore, the general congruence between the ecomorphological results and the independently obtained ecological data about the analyzed fish species in their natural environment seems to be strong evidence in favor of the proposed predictive capabilities of the ecomorphological hypothesis.

scholarly journals Spatial, seasonal and ontogenetic variation in the diet of Astyanax aff. fasciatus (Ostariophysi: Characidae) in an Atlantic Forest river, Southern Brazil

2009 ◽  
Vol 7 (2) ◽  
pp. 257-266 ◽  
Author(s):  
Luciano Lazzarini Wolff ◽  
Vinícius Abilhoa ◽  
Flavia Sant'Anna Rios ◽  
Lucélia Donatti
Keyword(s):  
Resource Availability ◽  
Feeding Habits ◽  
Stomach Contents ◽  
Animal Origin ◽  
Spatial And Temporal Variation ◽  
Plant Origin ◽  
Southern Brazil ◽  
Food Items ◽  
Terrestrial Insects ◽  
Common Items

This study described the feeding habits of the characin Astyanax aff. fasciatus. The diet compositions of specimens from two sites (A and B) on a river in Southern Brazil were compared according to the size of individuals and seasonal period. The collections were performed monthly from March 2005 to February 2006, where the stomach contents of 290 specimens were assessed. Food items for A. aff. fasciatus were basically composed of plants and insects, especially leaf fragments, seeds, fruits, filamentous algae, aquatic and terrestrial insects and insect fragments. At site A, the most common items were insect and plant fragments. Conversely at site B, plant fragments were more representative. In general, all items of animal origin showed the highest feeding index values at site A, whereas at site B detritus and grass items were more abundant. The composition of items varied seasonally, with higher diversity of items being recorded during the spring at both sites. Smaller individuals preferred items of animal origin, while the larger ones consumed mainly items of plant origin. According to its size, A. aff. fasciatus in this study may be considered a species with insectivorous tendencies when immature or herbivorous tendencies when adult. Nevertheless, its feeding habits may be flexible according to resource availability, showing wide ontogenetic, besides spatial and temporal variation.

scholarly journals Diet of fishes in Passa Cinco stream, Corumbataí River sub-basin, São Paulo state, Brazil

2011 ◽  
Vol 71 (1) ◽  
pp. 157-167 ◽  
Author(s):  
G. Rondineli ◽  
LM. Gomiero ◽  
AL. Carmassi ◽  
FMS. Braga
Keyword(s):  
Fish Species ◽  
Food Preference ◽  
Aquatic Insect ◽  
Feeding Preference ◽  
Higher Order ◽  
Plant Debris ◽  
Insect Larvae ◽  
Paulo State ◽  
Food Items ◽  
Aquatic Insect Larvae

The aim of this study was to describe and classify the food preference of fish species in Passa Cinco stream. The grade of feeding preference was applied to stomachs considered replete. This method consists of attributing values to food items found in certain species, according to the participation of each item in the analysed stomach. We analysed 576 full stomachs of 28 species. The autochthonous insects were the main constituents of the diets of these species, and the majority of ingested items classified as occasional. Allochthonous items such as plant debris, seeds and earthworms were associated with higher-order site. Of the total possible combination pairs of species, 29.4% showed high overlap, wich occurred mainly within species that consumed aquatic insect larvae. However, those species showed significant differences in the exploitation of food resources. Omnivory was common, showing the plasticity of the required species that inhabit environments as found in streams.

scholarly journals Effects of bromeliad flowering event on the community structuring of aquatic insect larvae associated with phytotelmata of Aechmea distichantha Lem. (Bromeliaceae)

2017 ◽  
Vol 29 (0) ◽  
Author(s):  
Felipe Emiliano Amadeo ◽  
Juliana Déo Dias ◽  
Bianca Trevizan Segovia ◽  
Nadson Ressyé Simões ◽  
Fábio Amodêo Lansac-Tôha
Keyword(s):  
Growth Phase ◽  
Vegetative Growth ◽  
Beta Diversity ◽  
Aquatic Insect ◽  
Insect Larvae ◽  
Local Factors ◽  
Flowering Phase ◽  
Regional Factors ◽  
Aquatic Insect Larvae ◽  
Phenological Phases

Abstract Aim: We aimed to understand how aquatic insect larvae communities associated with bromeliad phytotelmata are affected by plant architecture, predators and resources (local factors), and by geographical distance (regional factors) in two different plant phenological phases. Bromeliad flowering results in plant structural changes, which favours insect dispersal. Considering that local and regional factors may affect the community of aquatic insect larvae, we expected that composition, beta diversity and the importance of those factors would differ in the vegetative growth and flowering phases. Methods We performed six samplings of the bromeliad associated fauna in 2010, three during the first semester - vegetative growth phase - and three during the second semester - flowering phase. In each sampling, we collected 12 plants along the rocky walls with similar location distribution, with a total of 72 bromeliads studied. Results Although beta diversity (PERMDISP) did not differ between vegetative growth and flowering, NMDS followed by ANOSIM showed that composition was significantly different in the distinct phenological phases. IndVal results showed that three Diptera morphospecies were discriminant of the vegetative growth phase. In addition, pRDA revealed differences in the relative contribution of local and regional factors to explain insect larvae community structure. During the flowering phase, local factors predominated, while during vegetative growth, regional factors were more important. Conclusion Differences in dispersal rates between the two phenological phases, likely due to adult insect pollination and further oviposition, influenced community structuring. Therefore, flowering events account for differences not only in the composition, but also in community structuring of aquatic insect larvae inhabiting the phytotelmata of Aechmea distichantha Lem. (Bromeliaceae).

In vitro infection experiments with eggs of the nematode Contracaecum rudolphii Hartwich, 1964 (sensu lato) targeting aquatic insect larvae (Odonata: Coenagrionidae and Libellulidae; Trichoptera: Integripalpia) as possible intermediate hosts

2014 ◽  
Vol 43 (2) ◽  
Author(s):  
Janina Dziekońska-Rynko ◽  
Jerzy Rokicki ◽  
Katarzyna Mierzejewska
Keyword(s):  
Aquatic Insects ◽  
Aquatic Insect ◽  
Intermediate Hosts ◽  
Insect Larvae ◽  
Contracaecum Rudolphii ◽  
High Prevalence ◽  
Nematode Eggs ◽  
Newly Hatched Larvae ◽  
Aquatic Insect Larvae

AbstractThe availability of aquatic insects (Odonata: Coenagrionidae, Libellulidae and Trichoptera: Integripalpia) as potential intermediate hosts for the nematode Contracaecum rudolphii Hartwich, 1964 sensu lato was studied under laboratory conditions. The infective material consisted of nematode eggs, newly hatched larvae, as well as in vitro infected cyclopoid copepods. High prevalence and intensity of infection associated with a low mortality of aquatic insect larvae suggests that they may serve as intermediate hosts for C. rudolphii and constitute a major reservoir of C. rudolphii larvae in aquatic habitats.

scholarly journals Trophic habits of the invasive crab Libinia dubia H. Milne Edwards, 1834 from the Gulf of Gabès (Tunisia)

2020 ◽  
Author(s):  
AMANI CHAFFAI ◽  
WAFA RJIBA-BAHRI ◽  
ASMA ABIDI ◽  
FRANҪOISE DENIS ◽  
JAMILA BEN SOUISSI
Keyword(s):  
Feeding Habits ◽  
Carapace Width ◽  
Stomach Contents ◽  
Spider Crab ◽  
Gulf Of Gabes ◽  
Chi Square ◽  
Gulf Of Gabès ◽  
Chi Square Test ◽  
Herbivorous Species ◽  
Stomach Weight

Feeding habits of the invasive spider crab Libinia dubia from the Mediterranean Sea were studied in the Gulf of Gabès (Tunisia) using the frequency of occurrence and points methods. The population was sampled at least monthly between November 2015 and October 2016. Stomach contents of 384 specimens were analysed. Results indicate that L. dubia is an herbivorous species exhibiting clear preferences for algae (ALG) and Magnoliophyta (MAG) (62.03%, 7.13 points and 59.36%, 5.3 points respectively) although Echinodermata (ECH), Porifera (POR), Cnidaria (CNI), Mollusca (MOL), Polychaeta (POL), Crustacea (CRU) and fish (FIS) were accidentally consumed along with Bryozoa (BRY), sediment (SED), and unidentifiable materials (UNM). The diversity of ALG ingested was studied in detail: Chlorophyceae were found in 87.93% of stomachs containing ALG and contributed most of points to the stomach contents (4.18 points) followed respectively by Phaeophyceae (81.03%, 2.27 points) and Rhodophyceae (40.95%, 0.68 points).Very low Vacuity Index was recorded (VI = 2.6%). Ingested items varied significantly with regard to the season (Chi-square test, χ2calculated = 87.86 > χ2theoretical = 7.81, df = 3, p < 0.05) and crab size (χ2calculated = 14.25 > χ2theoretical = 5.99, df = 2, p = 0.026). Insignificant differences were registered by studying Carapace Width-Stomach Weight (CW-SW) relationships (T-test, tcalculated < ttheoretical, p > 0.05). Kruskal-Wallis test was applied so that the composition of crab diet among groups could be compared (H = 1.1, df = 3, p = 0.77). 

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