التفاصيل البيبلوغرافية
| العنوان: |
Feeding habit of Brown trout (Salmo trutta fario) in upper parts of river Swat, Pakistan. |
| المؤلفون: |
Khan W; University of Malakand, Department of Zoology, Lower Dir, Khyber Pakhtunkhwa, Pakistan., Naqvi SMHM; Southern Zone Agricultural Research Center - SARC, Outreach Research Activity Unit - ORAU, Karach, Pakistan., Khan HU; University of Malakand, Department of Statistics, Lower Dir, Khyber Pakhtunkhwa, Pakistan., Rafiq M; University of Malakand, Department of Zoology, Lower Dir, Khyber Pakhtunkhwa, Pakistan., Ahmad B; University of Malakand, Department of Zoology, Lower Dir, Khyber Pakhtunkhwa, Pakistan., Ahmad B; Islamia College University, Peshawar, Department of Zoology, Peshawar, Pakistan., Ahmad B; University of Swabi, Department of Zoology, Swabi, Pakistan., Noor A; Karakoram International University Gilgit-Baltistan, Biological Sciences Department, Biltstan, Pakistan., Akhtar S; Hazara University, Department of Zoology, Mansehra, Pakistan., Shadman M; University of Malakand, Department of Zoology, Lower Dir, Khyber Pakhtunkhwa, Pakistan. |
| المصدر: |
Brazilian journal of biology = Revista brasleira de biologia [Braz J Biol] 2021 Mar 26; Vol. 82, pp. e239219. Date of Electronic Publication: 2021 Mar 26 (Print Publication: 2021). |
| نوع المنشور: |
Journal Article |
| اللغة: |
English |
| بيانات الدورية: |
Publisher: International Institute of Ecology Country of Publication: Brazil NLM ID: 101129542 Publication Model: eCollection Cited Medium: Internet ISSN: 1678-4375 (Electronic) Linking ISSN: 15196984 NLM ISO Abbreviation: Braz J Biol Subsets: MEDLINE |
| أسماء مطبوعة: |
Original Publication: São Carlos, SP [Brazil] : International Institute of Ecology, [2000]- |
| مواضيع طبية MeSH: |
Rivers* , Trout*, Animals ; Bees ; Diet ; Habits ; Pakistan |
| مستخلص: |
Salmo trutta fario is the most important fish species of family Salmonidae inhibited in cool waters all over the world including the nortern parts of Pakistan. This study was aimed to find out the prey selection and feeding habits of the species. One hundred and eighty five Salmo trutta fario were captured from March 2016 to April 2017. Feeding intensity as represented by a fullness index (FI), changing with various length groups and season. Out of 185 Brown trout 24 fish stomaches were found empty. The most important and common food items of brown trout were Brachycentridae, Blepharocera, Hydropsychidae, ephemerella spp. Kruskal Wallis H-test were applied on feeding intensity groups consisting of three month group. The test statistic for K.W-H-test were (H=8.13 with df =3) had a p-value of 0.043 < (alpha=0.05 indicates favor of the alternative hypothesis of at least one difference among the feeding intensity groups. The linear relationship of N with index of relative importance and %IRI denoted by least square regression line (N = 35.2 + 22.1%IRI), shows that for 22 prey there is 1% change in IRI. The relationship between total length (mm) and fish body weight (gm) is expressed by Pearson correlation coefficient (r = 0.976), showed that total length (mm) and fish body weight (gm.) is highly correlated. Descriptive statistics are used for the stomach fullness, which shows that feeding intensity was recorded higher from March to May. A total of 2289 preys was recorded including the most common were; Trichoptera, Hydropsychidae, Brachycentridae, diptera, blepharocera, ephemerala, chironomida, honey bees, grass hopper, locust, trout egg, trochanter, plant tissue, stones were retrieved from the gut contents of brown trout. According to index of relative importance IRI% four preys represents major components of the diet. The highest IRI% was recorded in Brachycentridae (39.38%), followed by blepharocera (13.23%), Hydropsychidae (10.76%) and ephemerella spp (8.28%). The relationship between IRI and FO is (r =0.556) is moderately correlated with coefficient of determination (r2=0.31). This study will help in the development of an artificial diet for the species for better growth performance in captivity. |
| تواريخ الأحداث: |
Date Created: 20210331 Date Completed: 20210402 Latest Revision: 20210402 |
| رمز التحديث: |
20240628 |
| DOI: |
10.1590/1519-6984.239219 |
| PMID: |
33787749 |
| قاعدة البيانات: |
MEDLINE |
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