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首页> 外文期刊>The Progressive Fish-Culturist >OBSERVED GROWTH, SURVIVAL, AND CAUDAL FIN RAY DEFORMITIES OF INTENSIVELY CULTURED RAZORBACK SUCKERS
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OBSERVED GROWTH, SURVIVAL, AND CAUDAL FIN RAY DEFORMITIES OF INTENSIVELY CULTURED RAZORBACK SUCKERS

机译：强力培养的刺背吸盘的观察到的生长，存活率和尾鳍鳍形畸变

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Approximately 65% of the razorback suckers Xyrauchen texanus hatched at Colorado Division of Wildlife's (CDOW) Fish Research Hatchery (FRH) in 1993 exhibited fin deformities. A subsample of razorback suckers hatched from eggs obtained in 1994 were used in feeding trials to determine if feed brand and type (i.e., nutrition) caused these deformities. Other possible causes considered in the study design included environmental factors and genetic predisposition. Four razorback suckers, two males and two females, were spawned at the Horsethief Canyon State Wildlife Area, Fruita, Colorado. Each of the four crosses of known parental identity were assigned to lots and transferred to the FRH for hatching and rearing. Three subsets of 200 larvae from each cross were fed different commercial diets. All lots fed Fry Feed Kyowa grew more quickly than lots fed Hatchfry Encapsulon or Hatchfry Encapsulon supplemented with Spirulina. Growth of larvae from all lots fed the Encapsulon diets was similar, with no apparent benefit realized from Spirulina supplementation. Upon termination of the feeding trial, all experimental larvae exhibited varying degrees of fin deformity. Larvae not included in the feeding trial rarely displayed fin deformities, although they were also fed Fry Feed Kyowa and were reared in the same trough as their siblings. Because feed, environmental conditions, and parents were identical during each trial, the fin deformities were attributed to handling stress.
机译：1993年在科罗拉多州野生生物（CDOW）鱼研究孵化场（FRH）孵化的剃刀吸盘Xyrauchen texanus约有65％表现出鳍畸形。从1994年获得的卵中孵出的剃刀背吸盘子样本用于喂养试验，以确定饲料的品牌和类型（即营养）是否引起了这些畸形。研究设计中考虑的其他可能原因包括环境因素和遗传易感性。在科罗拉多州Fruita的Horsethief峡谷州立野生动物保护区产生了四个剃须刀吸盘，分别是两只雄性和两只雌性。已知父母身份的四个杂交物中的每一个都被分配给批次，并转移到FRH进行孵化和饲养。从每个杂交的三个幼体的200个幼虫中获得不同的商业饮食。饲喂Fry Feed Kyowa的所有批次的生长速度都快于补充了螺旋藻的Hatchfry Encapsulon或Hatchfry Encapsulon的批次。喂食Encapsulon日粮的所有批次的幼虫生长都相似，补充螺旋藻并没有带来明显的好处。喂养试验终止后，所有实验幼虫均表现出不同程度的鳍畸形。喂养试验中未包括的幼虫很少出现鳍畸形，尽管它们也被喂食了Fry Feed Kyowa，并在与兄弟姐妹相同的槽中饲养。由于每次试验期间的饲料，环境条件和父母均相同，因此鳍变形归因于处理压力。

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