Zooplankton composition and trophic status of hydrobionts of the Laptev and East Siberian seas

Species composition, density, biomass and distribution of zooplankton on shelf and slope of northwestern part of the Laptev Sea and shallow-water shelf of the East Siberian Sea were studied in 2015 summer period. Using analysis of stable isotopes of carbon (13 С) and nitrogen (15N), trophic status of abundant zooplankton and fish species, and their positions in food webs of these two seas, were compared. Gut content analysis, as well stable isotope data, showed mutual changes in the trophic status of dominant fish species arctic cod, Boreogadus saida, with age.

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EVALUATION OF ECOLOGICAL IMPORTANCE OF MYSIDS AS A FOOD ITEM IN THE DIET OF FISH, NEW ZEALAND

International Journal of Environment ◽

10.3126/ije.v4i3.13228 ◽

2015 ◽

Vol 4 (3) ◽

pp. 35-41

Author(s):

N. N. Punchihewa

Keyword(s):

Content Analysis ◽

Fish Species ◽

Food Item ◽

Stomach Contents ◽

Gut Content Analysis ◽

Gut Content ◽

Isotopic Study ◽

Fish Samples ◽

Significant Enrichment ◽

Ecological Importance

The main objective of this study is to determine the ecological importance of mysids as a food item of selected fish species using C and N isotopes (stable isotopic study) and gut content analysis of fish. Fish samples (Galaxias maculates and Athrinidae sp.) and mysid samples (Tenagomysis chiltoni and T. novaezealandiae) were collected from Kakamatua Stream situated on the west coast of Auckland region in late January 2009 (summer). All the collected samples were oven-dried, and then ground to obtain a homogeneous powder. Three replicates of each sample were prepared. Samples were processed by the Waikato Stable Isotope Unit (Scientific/20). For gut content analysis, ten specimens of each fish species, G. maculates and Athrinidae sp. were collected and were fixed in 5% formalin immediately. These fish specimens were dissected out and the stomach contents were mixed in a beaker with 10 ml water. After mixing, the contents were examined under the light microscope fitted with an eye piece micrometer. It is evident from both methods that two mysid species T. chiltoni and T. novaezealandiae form a substantial component of the diet of commercially important G. maculates, at Kakamatua stream. Changes in the diet, during the ontogenetic development, in relation to body size have shown a significant enrichment of ?15N values and ?13C values of T. chiltoni and G. maculates.International Journal of Environment Volume-4, Issue-3, June-August 2015Page: 35-41

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Understanding arthropod trophic relationships in Mediterranean lettuce crops by DNA-based gut-content analysis

10.1603/ice.2016.111906 ◽

2016 ◽

Author(s):

Nuria Agusti

Keyword(s):

Content Analysis ◽

Trophic Relationships ◽

Gut Content Analysis ◽

Gut Content

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Temporo-spatial heterogeneity of dominant fish species in the Jiaozhou Bay community

Journal of Fishery Sciences of China ◽

10.3724/sp.j.1118.2017.16316 ◽

2017 ◽

Vol 24 (5) ◽

pp. 1091

Author(s):

Jia WO ◽

Binduo XU ◽

Ying XUE ◽

Yiping REN ◽

Chongliang ZHANG

Keyword(s):

Spatial Heterogeneity ◽

Fish Species ◽

Jiaozhou Bay ◽

Dominant Fish

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Analisis Isi Lambung Ikan Selais Terang Bulan (Kryptopterus bicirrhis, Valenciennes 1840) Di Desa Rantau Kasih Sungai Kampar Kiri Propinsi Riau

Biospecies ◽

10.22437/biospecies.v11i1.4998 ◽

2018 ◽

pp. 57-63

Author(s):

Ermi Yeni ◽

Roza Elvyra

Keyword(s):

Content Analysis ◽

Gut Content Analysis ◽

Gut Content ◽

Additional Food ◽

Male And Female ◽

Carnivorous Fish ◽

Supplementary Food ◽

Main Food

The study on gut content of Selais Terang Bulan fish (Kryptopterus bicirrhis) in Rantau Kasih village Kampar Kiri river was conducted from Februari- April 2017. The purpose of this study was to know about gut content of Selais Terang Bulan fish which was categorized as main food, supplementary food and additional food. The analysis is done based on the instruction of Natardjan and Jhingran (1961). The gut content was analized using the Index of preponderance. The result revealed that the main food of Selais Terang Bulan fish in Rantau Kasih village is adult Arthropoda with IP value (78.85%), and supplementary food is caterpillar (25.15%). Male and female fishes at have main food of adult Arthropoda with different percentages are (82.81%) male and female (71.32%). Based on the gut content analysis of Selais Terang Bulan fish was a carnivorous fish.

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