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Egg size and larval size among teleosts: implications to survival potential.

หน่วยงาน Southeast Asian Fisheries Development Center, Philippines

รายละเอียด

ชื่อเรื่อง : Egg size and larval size among teleosts: implications to survival potential.
นักวิจัย : Bagarinao, Teodora U. , Chua, Thia-Eng.
คำค้น : Finfishes , Life history , Size , Larvae , Eggs , Survival , Philippines
หน่วยงาน : Southeast Asian Fisheries Development Center, Philippines
ผู้ร่วมงาน : -
ปีพิมพ์ : 2529
อ้างอิง : 971102227 , http://hdl.handle.net/10862/257
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : In: Maclean, J.L., Dizon, L.B., Hosillos, L.V. (eds.). The First Asian Fisheries Forum. Proceedings of the First Asian Fisheries Forum, 26-31 May 1986, Manila, Philippines. Manila, Philippines: Asian Fisheries Society. pp. 651-656
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

A survey of the early life history characteristics of 135 teleost fishes from freshwater, marine, tropical, temperate and boreal habitats show the influence of egg size and larval size on survival potential. Marine species have smaller eggs and larvae than freshwater species at similar temperatures. Coldwater species tend to have larger eggs and larvae than warm water species. Egg diameters are positively correlated with larval lengths (Lh) and weights at hatching. The times from fertilization to onset of feeding (tf), to yolk and oil resorption (ty) and to irreversible starvation (ts), increase linearly with Lh and decrease exponentially with temperature. Both tf and ts are positive linear functions of ty. Thus, larger larvae with much yolk that lasts for a relatively longer period feed later and if not fed, will starve later than small larvae with little yolk. Larger larvae will thus have the advantage under conditions of limited or variable food supply. Moreover, large larvae tend to have large mouths and are thus capable of ingesting large high-calorie prey. They also tend to have higher swimming speeds and greater potential to encounter food and avoid predators. There is no definite relation between growth rates and Lh, but tropical species with small eggs and larvae tend to have high growth rates. Survival potential has implications in the recruitment to natural stocks and in seed production in hatcheries.

บรรณานุกรม :
Bagarinao, Teodora U. , Chua, Thia-Eng. . (2529). Egg size and larval size among teleosts: implications to survival potential..
    : Southeast Asian Fisheries Development Center, Philippines.
Bagarinao, Teodora U. , Chua, Thia-Eng. . 2529. "Egg size and larval size among teleosts: implications to survival potential.".
    : Southeast Asian Fisheries Development Center, Philippines.
Bagarinao, Teodora U. , Chua, Thia-Eng. . "Egg size and larval size among teleosts: implications to survival potential.."
    : Southeast Asian Fisheries Development Center, Philippines, 2529. Print.
Bagarinao, Teodora U. , Chua, Thia-Eng. . Egg size and larval size among teleosts: implications to survival potential.. : Southeast Asian Fisheries Development Center, Philippines; 2529.