scholarly journals Development of a foraging model framework to reliably estimate daily food consumption by young fishes

2017 ◽  
Vol 74 (10) ◽  
pp. 1668-1681 ◽  
Author(s):  
David Deslauriers ◽  
Alex J. Rosburg ◽  
Steven R. Chipps
Keyword(s):  
Water Temperature ◽  
Food Consumption ◽  
Prey Density ◽  
Handling Time ◽  
Prey Type ◽  
Daily Consumption ◽  
Model Framework ◽  
Fish Feeding ◽  
Daily Food Consumption ◽  
Daily Food

We developed a foraging model for young fishes that incorporates handling and digestion rate to estimate daily food consumption. Feeding trials were used to quantify functional feeding response, satiation, and gut evacuation rate. Once parameterized, the foraging model was then applied to evaluate effects of prey type, prey density, water temperature, and fish size on daily feeding rate by age-0 (19–70 mm) pallid sturgeon (Scaphirhynchus albus). Prey consumption was positively related to prey density (for fish >30 mm) and water temperature, but negatively related to prey size and the presence of sand substrate. Model evaluation results revealed good agreement between observed estimates of daily consumption and those predicted by the model (r2 = 0.95). Model simulations showed that fish feeding on Chironomidae or Ephemeroptera larvae were able to gain mass, whereas fish feeding solely on zooplankton lost mass under most conditions. By accounting for satiation and digestive processes in addition to handling time and prey density, the model provides realistic estimates of daily food consumption that can prove useful for evaluating rearing conditions for age-0 fishes.

Food Consumption of Walleye (Stizostedion vitreum vitreum) and Sauger (S. canadense) in Relation to Food Availability and Physical Conditions in Lake of the Woods, Minnesota, Shagawa Lake, and Western Lake Superior

1977 ◽  
Vol 34 (10) ◽  
pp. 1643-1654 ◽  
Author(s):  
William A. Swenson
Keyword(s):  
Body Weight ◽  
Food Consumption ◽  
Yellow Perch ◽  
Prey Density ◽  
Lake Superior ◽  
Stizostedion Vitreum ◽  
Lake Of The Woods ◽  
Daily Food Consumption ◽  
Western Lake ◽  
Daily Food

Measurement of walleye (Stizostedion vitreum vitreum) daily food consumption rates and prey density in Lake of the Woods, Minnesota, Shagawa Lake, and western Lake Superior showed a general relationship exists between the two variables. Daily food consumption increased from 1 to 3% of body weight at prey densities up to 400 mg∙m−3. Abundance of age 0 yellow perch (Perca flavescens) in Lake of the Woods, Minnesota, and Shagawa Lake resulted in much higher prey densities and daily food consumption to 4% of body weight. In Lake Superior where walleye fed exclusively on rainbow smelt (Osmerus mordax), prey density did not exceed 300 mg ∙m−3 and daily food consumption averaged less than 2.5% of body weight.Hourly food consumption by walleye changed in response to variation in prey availability and light intensity. Night feeding predominated during July and August when walleye fed on pelagic age 0 yellow perch. Feeding appeared to be continuous or crepuscular during June and September when larger demersal prey fish or invertebrates were eaten. Food consumption declined when prey concentrated near aquatic macrophytes and under conditions of high light intensity. Walleye daily food consumption was not influenced by a change in temperature from 20 to 15 °C.Daily food consumption of Lake of the Woods, Minnesota sauger (Stizostedion canadense) averaged less than walleye and was influenced by wave activity and prey density. Demersal prey was utilized by sauger throughout the 24 h-day. Key words: Percidae, food consumption, behavior, feeding, walleye, Stizostedion vitreum vitreum, sauger, S. canadense, light

scholarly journals PENERAPAN TEKNOLOGI BUDIDAYA DAN SHOW OFF PRODUK MAKANAN BERBAHAN SAYURAN DAN DAMPAKNYA PADA SISWA SDN KARANGSALAM KECAMATAN KEDUNGBANTENG KABUPATEN BANYUMAS JAWA TENGAH

2018 ◽  
Vol 24 (3) ◽  
pp. 842
Author(s):  
Sapto Nugroho Hadi ◽  
Ahadiyat Yugi Rahayu ◽  
Okti Herliana
Keyword(s):  
Community Service ◽  
Food Consumption ◽  
Home Environment ◽  
Food Products ◽  
Student Interest ◽  
Daily Consumption ◽  
Daily Food Consumption ◽  
Daily Food ◽  
And Training ◽  
Vegetable Cultivation

AbstrakPermasalahan di SDN Karangsalam, yaitu (1). Pihak sekolah memiliki komitmen menjadi sekolah adiwiyata, namun belum memiliki program pendukung, (2). Pihak sekolah prihatin dengan minimnya pengetahuan siswa terhadap ragam jenis sayur dan manfaatnya, (3). Pola konsumsi makanan harian siswa yang cenderung instan, minim sayur dan gizi tidak berimbang, dan (4). Sekolah berada di lingkungan cukup padat penduduk yang belum memanfaatkan lingkungan rumahnya untuk kegiatan budidaya tanaman sayuran. Kegiatan ini bertujuan menerapkan teknologi budidaya tanaman sayuran dengan sistem demonstrasi dan plot (demplot), melakukan transfer pengetahuan beragam jenis sayur dan manfaatnya, dan show off produk makanan berbahan sayuran. Metode yang dilaksanakan, yaitu demplot dan pelatihan budidaya tanaman sayuran, transfer pengetahuan tentang beragam jenis sayur dan manfaatnya, serta show off produk makanan berbahan sayuran. Hasilnya kegiatan ini dapat meningkatkan pengetahuan siswa terhadap budidaya sayuran dengan teknik vertikultur dari 0% menjadi 71%, meningkatkan pengetahuan siswa terhadap ragam jenis sayuran dari 0% menjadi 92%, meningkatkan kemampuan siswa menjawab dengan benar manfaat sayuran bagi kesehatan dari 0% menjadi 62%, meningkatkan ketertarikan siswa dalam budidaya tanaman sayuran dari 33% menjadi 46%, meningkatkan kesukaan siswa terhadap makanan berbahan sayuran dari 92% menjadi 100%, meningkatkan frekuensi harian konsumsi siswa terhadap makanan berbahan sayuran dari 42% menjadi 71%.Kata kunci: SDN Karangsalam, Pengabdian Kepada MasyarakatAbstractProblem in SDN Karangsalam: (1). The school has a commitment to become adiwiyata schools, but there is no supporting program, (2). Students' lack of knowledge of vegetables type and their benefits, (3). Daily food consumption of students tend to be instant, lack of vegetables, and (4). The community around the school has not utilized the home environment for vegetable cultivation. This activity aimed to implement vegetable cultivation with demonstration and plots (demplot), transfer knowledge of vegetables type and their benefits, and show off vegetable-based food products. The methods were implemented: demplot and training in vegetable cultivation, transfer knowledge of vegetables type and their benefits, and show off vegetable-based food products. The result showed increasing: students' knowledge of verticulture techniques for vegetable cultivation from 0% to 71%, students' knowledge of vegetables type from 0% to 92%, students' ability for answering the benefits of vegetables from 0% to 62%, student interest in vegetable cultivation from 33% to 46%, students' preference for vegetable-based foods from 92% to 100%, the frequency of daily consumption of vegetable-based foods from 42% to 71%.Keywords: SDN Karangsalam, Community service

Acute Daily Stress, Daily Food Consumption, and the Moderating Effect of Disordered Eating among Adolescents with Overweight/Obesity

2021 ◽  
Author(s):  
Tiwaloluwa A. Ajibewa ◽  
Leah E. Robinson ◽  
Claudia Toledo-Corral ◽  
Alison L. Miller ◽  
Kendrin R. Sonneville ◽  
...  
Keyword(s):  
Disordered Eating ◽  
Food Consumption ◽  
Moderating Effect ◽  
Daily Stress ◽  
Daily Food Consumption ◽  
Daily Food
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