Stable isotopes and elements as biological markers to determine food resource use pattern by Lasioderma serricorne (Coleoptera: Anobiidae)

2013 ◽  
Vol 52 ◽  
pp. 100-106 ◽  
Author(s):  
Rizana M. Mahroof
Keyword(s):  
Stable Isotopes ◽  
Resource Use ◽  
Biological Markers ◽  
Food Resource ◽  
Lasioderma Serricorne ◽  
Use Pattern

scholarly journals Fisheries Communities and Resource-Use Pattern: Chimdi Lake and its Surrounding Wetlands

Our Nature ◽  
1970 ◽  
Vol 2 (1) ◽  
pp. 35-39
Author(s):  
Pramila Gachhadar ◽  
A. R. Adhikari ◽  
R.P. Chaudhary
Keyword(s):  
Resource Use ◽  
Lake Area ◽  
Use Pattern ◽  
Surrounding Areas ◽  
Lake Fisheries

The study was carried out among the fisheries dependent communities of Chimdi lake area, Sunsari district. Major stakeholders of fisheries communities in this lake and its surrounding areas, their expectations and role were identified. Keywords: Chimdi lake, Fisheries Community, Wetlands, Sunsari districtdoi:10.3126/on.v2i1.323Our Nature (2004) 2: 35-39

scholarly journals Patterns of food resource use by two congeneric species of piranhas (Serrasalmus) on the upper Paraná river floodplain

2003 ◽  
Vol 63 (2) ◽  
pp. 177-182 ◽  
Author(s):  
C. S. Agostinho ◽  
N. S. Hahn ◽  
E. E. Marques
Keyword(s):  
Resource Use ◽  
Native Species ◽  
Feeding Strategy ◽  
Food Resource ◽  
Paraná River ◽  
Activity Period ◽  
Parana River ◽  
Invading Species ◽  
Upper Paraná River Floodplain ◽  
Upper Paraná River

Serrasalmus marginatus invaded the Upper Paraná River after construction of the Itaipu Dam in November 1982. This was followed by a reduction in abundance of the native species S. spilopleura. Analysis of the pattern of food resource use revealed that both species employ the same feeding strategy, eating mainly fish (whole fish or muscle fragments) and fins bitten off their prey. The diurnal activity period and the feeding rhythm were better-defined in S. marginatus. For young individuals of both species, food was taken in a significantly discontinuous manner (F = 2.83; p < 0.05 and F = 13.25; p < 0.05), with a peak at 4 p.m. Ontogenetic differences in diet, the strong feeding overlap of larger individuals of S. marginatus and smaller individuals of S. spilopleura, and the aggressiveness of S. marginatus in establishing feeding territories may have contributed to the success of the invading species.

scholarly journals Spatial, seasonal and ontogenetic changes in food resource use by a piscivore fish in two Pantanal lagoons, Brazil

2013 ◽  
Vol 11 (1) ◽  
pp. 163-170 ◽  
Author(s):  
Michele de Faveri Gimenes ◽  
Rosemara Fugi ◽  
Andréia Isaac ◽  
Marlene Rodrigues da Silva
Keyword(s):  
Resource Use ◽  
Pearson Correlation ◽  
Food Resource ◽  
Morphological Characteristics ◽  
Immature Stages ◽  
Ontogenetic Changes ◽  
Strong Negative Correlation ◽  
Use Of Resources ◽  
Spearman Coefficient ◽  
Flood Period

We evaluated the factors that affect the food resource use by Plagioscion ternetzi using three approaches: spatial, seasonal, and ontogenetic changes. Fish were sampled between March 2000 and February 2001 and March 2003 and February 2004 in the Sinhá Mariana and Chacororé lagoons, wetlands of the Pantanal Matogrossense. Fish was the predominant food in the diet, but shrimps and insects have been also consumed. The diet of P. ternetzi was significantly different between lagoons, but no difference was detected between dry and flood periods. In Sinhá Mariana lagoon, the diet mainly consisted of Psectrogaster curviventris, in both periods. In the flood period in Chacororé lagoon, fish was the dominant food (especially Astyanax spp., Leporinus spp. and Schizodon borellii), and in dry, shrimp and Eigenmannia spp. The Spearman coefficient indicated no correlation between the abundance of caught fish species and their abundances in the diet of P. ternetzi in Sinhá Mariana lagoon, and a strong negative correlation at Chacororé lagoon, although some very consumed preys were numerically abundant in the environment. Despite the intake of insect and shrimp, P. ternetzi was piscivorous since immature stages. A correlation between each item and the size classes of P. ternetziwas tested by means of Pearson correlation that showed that the changes in the use of resources over ontogenetic development have been represented by increased intake of P. curviventris in Mariana lagoon, and S. borellii at Chacororé lagoon, accompanying the increase in the size of the predator. In this way, the results suggest that several factors can be involved in the use of food resources by P. ternezi, among them the abundance, the size and morphological characteristics of the prey.

Food resource use in a tropical eastern Pacific tidepool fish assemblage

2008 ◽  
Vol 153 (6) ◽  
pp. 1023-1035 ◽  
Author(s):  
Gustavo Adolfo Castellanos-Galindo ◽  
Alan Giraldo
Keyword(s):  
Resource Use ◽  
Fish Assemblage ◽  
Food Resource ◽  
Eastern Pacific ◽  
Tropical Eastern Pacific

scholarly journals Stable isotopes and gut contents indicate differential resource use by coexisting asp (Leuciscus aspius ) and pikeperch (Sander lucioperca )

2018 ◽  
Vol 27 (4) ◽  
pp. 1054-1065 ◽  
Author(s):  
Mojmír Vašek ◽  
Antti P. Eloranta ◽  
Ivana Vejříková ◽  
Petr Blabolil ◽  
Milan Říha ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Resource Use ◽  
Gut Contents ◽  
Sander Lucioperca

scholarly journals Resource use pattern among poultry enterprises in Abia State, Nigeria

2021 ◽  
Vol 29 (1) ◽  
pp. 64-70
Author(s):  
J. A. Mbanasor
Keyword(s):  
Resource Use ◽  
Rural Areas ◽  
Descriptive Statistics ◽  
Unit Price ◽  
Meat Production ◽  
Output Data ◽  
Marginal Value ◽  
Low Protein ◽  
Use Pattern ◽  
Purposive Selection

The challenge to increase meat production in Nigeria appears to be more urgent now than ever. This is in view of the rapidly increasing population, the imminent decline in hunting and the low protein intake in rural areas. Poultry meal especially broiler is one of the easiest to produce, hence its purposive selection. Input-Output data were generated from selected poultry farmers in Abia State. The data were analyzed by use of descriptive statistics and econometric estimations. Efficiency in the resource use pattern was examined using Marginal Value Product of each of the examined resources with its unit price. It was identified that there are possibilities of increasing broiler mear supply through higher levels of resource-use pattern under the existing technology.

scholarly journals Spatial diet overlap and food resource in two congeneric mullet species revealed by stable isotopes and stomach content analyses

2018 ◽  
Vol 19 (2) ◽  
pp. 116-124 ◽  
Author(s):  
A.F.S. Garcia ◽  
A.M. Garcia ◽  
S.R. Vollrath ◽  
F. Schneck ◽  
C.F.M. Silva ◽  
...  
Keyword(s):  
Stable Isotopes ◽  
Stomach Content ◽  
Food Resource ◽  
Diet Overlap ◽  
Content Analyses

Resource use within the crab-eating guild of the upper Kairezi River, Zimbabwe

1996 ◽  
Vol 12 (4) ◽  
pp. 475-490 ◽  
Author(s):  
James R. A. Butler ◽  
Brian E. Marshall
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Resource Use ◽  
Intraguild Predation ◽  
Aquatic Insects ◽  
Prey Item ◽  
Resource Partitioning ◽  
Food Resource ◽  
Dry Season ◽  
Invertebrate Drift

ABSTRACTCape clawless otters Aonyx capensis and African mottled eels Anguilla bengalensis were suspected of reducing numbers of rainbow trout Oncorhynchus mykiss in the upper Kairezi River, Zimbabwe, by preying on them and competing for the river crab Potamon perlatus. The analysis of otter, eel and trout diets showed that this is unlikely. Trout was an unimportant prey item for otters, none were found in the stomachs of 13 large eels, and any predation was probably minimised by the low densities of these predators. Some competition was probably present because crabs occurred in the diets of otters (relative occurrence 41.9%), eels (63.2%) and trout (7.4%), but it was impossible to quantify. Since these predators shared the crab food resource, the guild concept provided the basis for an analysis of their potential competitive relationships. Comparisons between the sizes of crabs selected and those available suggested that resource partitioning was occurring. Trout selected small crabs from the invertebrate drift, and because they were restricted by their mouth gapes. Otters and large eels ate larger, more abundant crab sizes; it is proposed that they instead partition resources spatially by feeding in separate micro-habitats. Intraguild predation by otters on eels may benefit trout by reducing competition for aquatic insects. Competition within the guild probably recedes in the dry season, when eels become inactive.

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