کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5742056 1617387 2017 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Environmental effects on growth, reproduction, and life-history traits of loggerhead turtles
ترجمه فارسی عنوان
اثرات زیست محیطی بر رشد، تکثیر و صفات تاریخچه لاکپشت های لاغر
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
چکیده انگلیسی


- DEB model for loggerhead turtles predicts how environment affects life history traits.
- Age at puberty decreases with increasing food availability and temperature.
- Length00 and mass of fully grown individuals depends primarily on food availability.
- Reproduction output increases with both food availability and temperature.
- Length at puberty exhibits only modest variation in all simulated scenarios.

Understanding the relationship between the environmental conditions and life-history traits (such as growth, reproduction, and size at specific life stages) is important for understanding the population dynamics of a species and for constructing adaptable, relevant, and efficient conservation measures. For the endangered loggerhead turtle, characterizing effects of environmental conditions on the life-history traits is complicated by this species' longevity, global distribution, and migratory way of life. Two significant environmental factors - temperature and available food - often account for most of observed intra-population variability in growth and reproduction rates, suggesting that those two factors determine the biological responses of an individual. Adopting this hypothesis, we simulate a range of the two environmental factors to quantify effects of changes in temperature and food availability on an individual's physiology (energy investment into processes such as growth, maturation, and reproduction) and the resulting life-history traits. To represent an individual, we use a previously developed mechanistic dynamic energy budget (DEB) model for loggerhead turtles. DEB models rely on one of the empirically best validated general ecological theories, which captures rules of energy acquisition and utilization. We found that the ultimate size (length and mass) is primarily affected by food availability, whereas growth and maturation are primarily affected by temperature whilst also showing positive correlation with available food. Reproduction increases with both food availability and temperature because food availability determines energy investment into egg production, and temperature affects the rate of related processes (such as vitellogenesis). Length at puberty varies between simulated scenarios by only a small proportion, suggesting that inter-individual variability plays a larger role for length at puberty than the environmental factors do.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecological Modelling - Volume 360, 24 September 2017, Pages 163-178
نویسندگان
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