Responses to the ForagingPredation Risk Trade-Off and Individual Variability in Population-Level Fitness Correlates
المؤلف
المصدر
العدد
المجلد 2011، العدد 2011 (31 ديسمبر/كانون الأول 2011)، ص ص. 1-8، 8ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2011-06-07
دولة النشر
مصر
عدد الصفحات
8
التخصصات الرئيسية
الملخص EN
Foraging under the influence of interspecific interactions such as competition and predation risk can have effects on the energetic reserves of the forager.
Measurements of condition in species such as fish are usually correlated with individual fecundity and, hence, fitness.
From work in two study systems in which predation risk regulates habitat selection and foraging behavior of benthic fishes I examined whether risk dependence led to reduced variability in fish condition.
In field populations of cottid fishes, observed in an estuarine system and in the near-shore habitat of an oligotrophic lake, I found that individuals that experienced higher predation risk showed reduced variability in CI.
Estuarine cottids with high food availability and substantial predation risk varied less in CI among individuals than in the associated tidal creek.
In the lake, where there is considerable heterogeneity in benthic food resources, a related cottid species showed reduced variation in CI with increasing predation risk from adults.
Finally, I examine my previous experiments showing that the estuarine species is limited in its use of high resource availability in estuaries by competition and predation risk.
Here I found that variability in individual condition index (CI) was higher when intraspecific and interspecific competition increased and did not increase in the face of predation risk.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Polivka, Karl M.. 2011. Responses to the ForagingPredation Risk Trade-Off and Individual Variability in Population-Level Fitness Correlates. ISRN Ecology،Vol. 2011, no. 2011, pp.1-8.
https://search.emarefa.net/detail/BIM-467203
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Polivka, Karl M.. Responses to the ForagingPredation Risk Trade-Off and Individual Variability in Population-Level Fitness Correlates. ISRN Ecology No. 2011 (2011), pp.1-8.
https://search.emarefa.net/detail/BIM-467203
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Polivka, Karl M.. Responses to the ForagingPredation Risk Trade-Off and Individual Variability in Population-Level Fitness Correlates. ISRN Ecology. 2011. Vol. 2011, no. 2011, pp.1-8.
https://search.emarefa.net/detail/BIM-467203
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-467203
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر