Isotopic Evidence for Ontogenetic Shift in Food Resource Utilization during the Migration of the Slipmouth Leiognathus nuchalis in Gwangyang Bay, Korea

2020 ◽  
Vol 32 (2) ◽  
pp. 84-90
Author(s):  
Bohyung Choi ◽  
Hyunbin Jo ◽  
Kiyun Park ◽  
Ihn-Sil Kwak
Keyword(s):  
Resource Utilization ◽  
Food Resource ◽  
Ontogenetic Shift ◽  
Isotopic Evidence ◽  
Food Resource Utilization ◽  
Gwangyang Bay

Inter- and intra-guild patterns of food resource utilization by chironomid larvae in a subtropical coastal lagoon

Limnology ◽  
2013 ◽  
Vol 15 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Aurea Luiza Lemes-Silva ◽  
Paulo Roberto Pagliosa ◽  
Mauricio Mello Petrucio
Keyword(s):  
Resource Utilization ◽  
Coastal Lagoon ◽  
Food Resource ◽  
Chironomid Larvae ◽  
Food Resource Utilization

scholarly journals Food resource utilization of the skates Rioraja agassizii (Müller & Henle, 1841) and Psammobatis extenta (Garman, 1913) on the continental shelf off Ubatuba, South-eastern Brazil

2001 ◽  
Vol 61 (2) ◽  
pp. 217-238 ◽  
Author(s):  
E. Y. MUTO ◽  
L. S. H. SOARES ◽  
R. GOITEIN
Keyword(s):  
Feeding Habits ◽  
Food Resource ◽  
Stomach Content Analysis ◽  
Brazilian Coast ◽  
Relative Importance ◽  
Important Food ◽  
South Eastern ◽  
Eastern Brazil ◽  
Index Of Relative Importance ◽  
Food Resource Utilization

The feeding habits of Rioraja agassizii (syn. Raja agassizii) and Psammobatis extenta (syn. Psammobatis glansdissimilis) of the South-eastern Brazilian coast were studied by means of stomach content analysis. The samples were obtained on eight seasonal oceanographic cruises, carried out between October 1985 and July 1987. The importance of each food item was evaluated on the basis of the Index of Relative Importance and the feeding similarity by Percentage of Similarity. The results indicated that both species are benthic feeders, preying mainly on Crustacea, especially Amphipoda, Caridea and Brachyura. Teleostei were also important for R. agassizii. Seasonal variation of the diet seems to be associated with the availability of the prey, whose distribution and abundance are related to the dynamics of the water masses of the region. Juveniles and adults of P. extenta exploited the same resources while juveniles and adults of R. agassizii presented low diet similarity during most of the year. Caridea were an important food for all length classes of R. agassizii, while Amphipoda were for smaller specimens, and Teleostei for larger ones. The feeding overlap between the two species was higher during autumn 1986, winter 1986 and winter 1987.

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