...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>North American Journal of Aquaculture >Production and associated economics of fingerling-to-stocker and stocker-to-grow-out modular phases for farming Channel Catfish in commercial-size ponds.
【24h】

Production and associated economics of fingerling-to-stocker and stocker-to-grow-out modular phases for farming Channel Catfish in commercial-size ponds.

机译：在商业规格池塘中养殖Channel鱼的鱼种到放养和放养到生长的模块化阶段的生产和相关的经济性。

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A 2-year study was conducted to evaluate two phases (phase 2: fingerling to stocker; phase 3: stocker to grow out) of a three-phase modular production system for Channel Catfish Ictalurus punctatus in commercial-scale ponds. Fingerlings (mean=14.3 kg/1,000 fish; 11.9 cm TL) were stocked into each of six 1.62-ha earthen ponds at a density of 123,500 fish/ha and were fed a 35% crude protein floating feed daily to satiation. After 142 d, the mean weight of harvested stockers ranged from 108.9 to 158.8 g and survival ranged from 38.8% to 62.0%. These fish were subsequently stocked (at either 12,350 or 16,055 fish/ha) into 1.62-ha ponds for grow out to food-size fish (>=567.5 kg) and were fed a 35% crude protein floating feed to satiation. A partial (selective) harvest was conducted at 105-130 d poststocking by using an in-pond grader, and a final harvest was conducted at 207-245 d poststocking. Combined production means were 7,124 kg/ha for the 12,350-fish/ha treatment and 7,210 kg/ha for the 16,055-fish/ha treatment. Survival (range=84.3-105.5%) and feed conversion ratios (range=2.25-2.65) were not significantly different. Mean weight (659.5 g) and length (41.8 cm) of fish harvested from the 12,350-fish/ha treatment ponds were significantly greater than those of fish harvested from the 16,055-fish/ha treatment (474.8 g; 38.4 cm). Cost of producing a 142-g stocker was $0.409. For the economic analysis, phase-2 production area was based on producing sufficient stockers for all phase-3 ponds within a representative 445-ha operation. Enterprise budgets were developed for the 12,350- and 16,055-fish/ha treatments; the incomes above variable cost were $1,450 and $108 per hectare, respectively, and net returns to land were $399 and -$943 per hectare, respectively. Low survival in phase-2 stocker production reduced the returns. The three-phase modular system should provide additional management benefits that were not valued in this analysis.Digital Object Identifier http://dx.doi.org/10.1080/15222055.2012.722172
机译：进行了为期两年的研究，以评估商业规模池塘中的Channel鱼斑点叉尾three的三相模块化生产系统的两个阶段（阶段2：种鱼到放养;阶段3：生长到放养）。将鱼种（平均= 14.3 kg / 1,000鱼; 11.9 cm TL）放养到六个1.62公顷的土池中，密度为123,500鱼类/公顷，每天饲喂35％的粗蛋白漂浮饲料。 142天后，收获的储存器的平均重量为108.9至158.8克，存活率为38.8％至62.0％。随后，将这些鱼放养到1.62公顷的池塘中（以每公顷12,350或16055鱼/公顷），长成食品大小的鱼（> = 567.5公斤），并饲喂35％的粗蛋白漂浮饲料。通过使用池塘中平地机在放养后105-130 d进行部分（选择性）收获，并在放养后207-245 d进行最终收获。 12350条鱼/公顷的处理综合产量为7124公斤/公顷，16055条鱼/公顷的处理综合产量为7210公斤/公顷。存活率（范围= 84.3-105.5％）和饲料转化率（范围= 2.25-2.65）没有显着差异。从12,350条鱼/公顷处理池塘收获的鱼的平均体重（659.5 g）和长度（41.8 cm）显着大于从16,055条鱼/公顷处理池塘收获的鱼的平均体重（474.8 g; 38.4 cm）。生产142克储存器的成本为0.409美元。为了进行经济分析，第二阶段的生产区域是基于在具有代表性的445公顷的作业中为所有第三阶段的池塘生产足够的储存量。为12,350和16055鱼/公顷的处理制定了企业预算;高于可变成本的收入分别为每公顷1,450美元和108美元，土地净收益分别为每公顷399美元和-943美元。二期库存生产中的低生存率降低了收益。三相模块化系统应提供此分析中未重视的其他管理优势。数字对象标识符http://dx.doi.org/10.1080/15222055.2012.722172

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号