On complex indices in investigation of fish feeding

Попова, О А; Reshetnikov, Yu. S.

doi:10.1134/s0032945211050171

Cited by 18 publications

(8 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…окуня и ерша. Для характеристики питания рыб был использован индекс относительной значимости (IR -index of relative significance) [11].…”

Section: материалы и методика исследованияunclassified

“…* N -число кормовых объектов на один желудочно-кишечный тракт, экз. ; F -частота встречаемости каждого компонента пищи, %; P -доля каждого компонента пищи по массе, %; IR -индекс относительной значимости[11]. Жирным шрифтом отмечен наиболее значимый объект питания (IR).…”

unclassified

See 1 more Smart Citation

Nutrition of perch (Percidae) in small lake in Lake Onega basin

Georgiev

Padchina

2022

Vestnik of Astrakhan State Technical University. Series: Fishing Industry

View full text Add to dashboard Cite

The article s focuses on studying the fish nutrition, which is one of the ways to identify the patterns of fish onto- and phylogenesis, as well as the patterns of fish abundance and using food resources in the water bodies. Nutrition determines the key physiological and biochemical reactions in the fish body in a qualitative and quantitative sense, which finally affects the growth of both individual organisms and the entire population. The results of these studies are of practical importance in the work of fish protection authorities. Information about the fish feeding in the small water bodies of Lake Onega basin is practically absent in the literature. There are presented the results of the studies carried out within the framework of forecasting and economic and contractual issues of the Northern Water Problems Institute of the Karelian Research Centre of the Russian Academy of Sciences (NWPI KarRC RAS) and Petrozavodsk State University (PetrSU) on assessing the nutrition of perch species (perch, ruff) in the lakes of the Konchezero group (South Karelia) - the lower reaches of the river Shuya belonging to the catchment area of Lake Onega. The work was carried out by the specialists of the NWPI KarRC RAS in 2018–2020. The main hydrological and ichthyological indicators of Lake Urozero have been studied. It is found that in the diet of perch in Lake Urosero there appear larvae Chironomidae, Ephemeroptera and aerial insects, and the latter having the maximum index of relative importance. The diet of ruff caught in Lake Urozero differs widely: along with benthic organisms fish eggs were also present. Ruff’s nutrition is more abundant: the index of filling its stomach averages 225.3 0/000 against 51.2 0/000 in perch. Perch longer than 13 cm is a typical ichthyophag in Lake Urosero. It is typical for the Karelian lakes that the transition of perch to predation is ob-served when reaching the size (on average) 15 cm.

show abstract

Section: материалы и методика исследованияunclassified

unclassified

Nutrition of perch (Percidae) in small lake in Lake Onega basin

Georgiev

Padchina

2022

Vestnik of Astrakhan State Technical University. Series: Fishing Industry

View full text Add to dashboard Cite

show abstract

“…Gut contents were dried on absorbent paper and each dietary item was weighed to the nearest 0.1 mg. The index of relative significance (IR) [53,54] was calculated as follows: IR = (Fi × Pi/∑Fi × Pi) × 100%, where Fi = frequency of occurrence of each food species, Pi = a part by weight; the value of i itself changes from 1 to n (n = the part of food organisms in the food bolus). In total, 65 individuals were investigated for diet.…”

Section: Diet and Stable Isotopesmentioning

confidence: 99%

Unexpected Diversity of Feeding Modes among Chisel-Mouthed Ethiopian Labeobarbus (Cyprinidae)

Левин

Komarova

Rozanova

et al. 2021

Water

View full text Add to dashboard Cite

Trophic resource partitioning is one of the main drivers of adaptive radiation. The evolutionary diversification of large African barbs, the genus Labeobarbus, seems to be related to mouth polymorphism. The chisel-mouthed or scraping phenotype has repeatedly evolved within Labeobarbus. At least five ecomorphs with a scraping mouth morphology were detected in the waters of the Ethiopian Highlands and can be provisionally classified into two groups: (i) “Varicorhinus”-like, and (ii) “Smiling”-like. Previously, all Labeobarbus with a scraping-mouth morphology were considered to be periphyton feeders. Using data on morphology, diet and stable isotope ratios (C and N), we addressed the question: does a scraping-mouth morphology predict feeding on periphyton? Our study revealed that five scraper ecomorphs exhibited three main feeding modes: (i) periphyton-eating, (ii) herbivory–detritivory, and (iii) insectivory. Two cases of the parallel divergence of sympatric ecomorphs with distinct feeding modes (herbivory–detritivory vs. insectivory) were revealed in two geographically isolated basins. A significant difference in δ15N values was detected among sympatric scraper ecomorphs. A periphytonophagous scraper was rich in δ15N values that are comparable with those in sympatric piscivorous fish. This data sheds light on the possibility of the utilization of periphyton as a protein-rich food by fishes.

show abstract

“…As fj IP has been independently developed several times in different countries (India, Brazil, France, Nigeria and Russia), it received several different names. These names include feeding index (Kawakami & Vazzoler, 1980), modified index of relative importance (Pitcher, 1980(Pitcher, , 1981, prey importance index (Probst et al, 1984 as a modification proposal derived from the index of relative importance, presented below), index of food dominance (King, 1990), index of relative significance Reshetnikov et al, 1993;Popova & Reshetnikov, 2011), food ponderal index (King, 1994), food index (Hahn, Agostinho, & Goitein, 1997), alimentary index (Alvim, Maia-Barbosa, & Alves, 1998), alimentary importance index (Salvador-Jr, Salvador, & Santos, 2009) and dominance index (Montaña & Winemiller, 2013).…”

Section: Index Of Preponderancementioning

confidence: 99%