สิงหาคม 12, 2020, 11:02:39 AM
ข่าว: กลับสู่เว็บไซต์ www.nicaonline.com
หน้า: [1]   ลงล่าง
ผู้เขียน หัวข้อ: Salinity effects on reproduction of giant freshwater prawn  (อ่าน 2229 ครั้ง)
0 สมาชิก และ 34 บุคคลทั่วไป กำลังดูหัวข้อนี้
mei
systems Research
YaBB God
******

Karma: 0
ออฟไลน์ ออฟไลน์

กระทู้: 596


ดูรายละเอียด
« เมื่อ: มกราคม 14, 2010, 08:43:44 AM »

Title: Salinity effects on reproduction of giant freshwater prawn Macrobrachium rosenbergii (de Man)

Pham Truong Yen, Amrit N. Bart ⁎
Aquaculture and Aquatic Resources Management, School of Environment, Resources and Development, Asian Institute of Technology, P.O. Box 4, Klong Luang, Pathumthani 12120, Thailand

Article history:Received 17 December 2007 Received in revised form 28 April 2008 Accepted 28 April 2008

Keywords:Macrobrachium rosenbergii, Larvae, Salinity,Reproduction, Recirculating system

A B S T R A C T

Understanding the role of salinity in breeding and growth has the potential to enhance production of giant
freshwater prawn, Macrobrachium rosenbergii. This study investigated the reproduction of females reared in salinities of 0, 6, 12, and 18 g L−1. Mean weight of females decreased with increased salinity (31.40±1.54, 25.14±1.16, 20.80±0.81, and 16.62±1.04 g at 0, 6, 12, and 18 g L−1, respectively). Larval production was delayed by 2 months in females reared in 12 g L−1 compared to 6 and 0 g L−1 and the cumulative number of berried females decreased with increased salinity. The number of larvae produced was positively correlated to weight of female. A larval production not only differed between salinity treatments, but also that larval production per gram of female differed between treatments. Females reared in lower salinity of 0 and 6 g L−1 produced larger numbers of larvae (12,155±480 and 6519±323, respectively) compared to 12 and 18 g L−1 (3751±256 and 0, respectively). The number of larvae produced per gram of female was inversely related to the salinity levels (Y=−37.54X+685.65, n=339, r2=0.995, pb0.05). Survival of larvae from females reared at 0 and 6 g L−1 was higher than those from females reared in 12 g L−1. This study clearly shows that female broodstock reared in lower salinity was larger, reproduced early, and produced more offspring than at higher salinity and this could significantly impact coastal prawn culture where seasonal fluctuation of salinity in the hatchery is common.

© 2008 Elsevier B.V. All rights reserved.
บันทึกการเข้า

หน้า: [1]   ขึ้นบน
พิมพ์
 
กระโดดไป: