REARING AND POST-EMBRYONIC DEVELOPMENT OF THE MYODOCOPID OSTRACODE SKOGSBERGIA-LERNERI FROM CORAL REEFS OF BELIZE AND THE BAHAMAS
REARING AND POST-EMBRYONIC DEVELOPMENT OF THE MYODOCOPID OSTRACODE SKOGSBERGIA-LERNERI FROM CORAL REEFS OF BELIZE AND THE BAHAMAS
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DOI：
10.2307/1548260
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发表时间：
1983-01-01
影响因子：
1.1
通讯作者：
COHEN, AC
中科院分区：
文献类型：
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作者：
COHEN, AC
S. Lerneri（Kornicker，1958）是介形目Myodocopida的第二个被完全饲养的物种。S. lerneri是一种无节食腐动物，在中美洲伯利兹和巴哈马圣萨尔瓦多岛的堡礁上设置的诱饵罐陷阱中数量丰富。活的材料被保存在珊瑚礁水族馆和小盘子里。S. lerneri有5个亚成虫龄，从卵巢中首次可见卵的时间开始计算，需要65-93天才能成熟。育雏期为14-18天。早在从前一窝第1龄幼虫的有囊袋释放后2天，就可以看到新卵在母体卵巢内形成。雌性产生多达3窝10-22 1龄的幼虫，所有这些幼虫显然都是由先前受精的精子受精的。S. Lerneri与另一种Cypridinid，Vargulahilgendorfii相似，部分在相似的温度下饲养，但比属于不同科的另外2种myodocopids的短得多，并保持在12 ℃。表和数字显示个体发育的变化，可用于确定每个龄期和初步的关键的各龄的Cypridinidae。最有用的特征是以下肢体上的刚毛数量：第1触角的第4节，下颌骨内肢的第2节的腹侧和第6肢体;以及第7肢体上刚毛的数量和形状。前3龄幼虫在身体上有一个后突。5龄和成虫的雌虫比雄虫大。同一母介形虫不同窝卵的5龄雄虫和成年雄虫的甲壳大小重叠。
S. lerneri (Kornicker, 1958) is the 2nd species of the ostracod order Myodocopida to be fully reared. S. lerneri, a meroplanktonic scavenger, was abundant in baited jar traps set on the barrier reef off Belize, Central America, and at San Salvador Island, Bahamas. Live material was maintained in a coral reef aquarium and in small dishes. S. lerneri had 5 subadult instars and required 65-93 days to reach maturity, measured from the time eggs first became visible in the ovary. Brooding time in the marsupium was 14-18 days. New eggs were visible forming within the ovary of the mother as early as 2 days following release from the marsupium of the previous clutch of 1st instars. Females produced as many as 3 clutches of 10-22 1st instars, all apparently fertilized by stored sperm from a previous insemination. Development time of S. lerneri is similar to that of another cypridinid, Vargula hilgendorfii, partially reared at a similar temperature, but is much shorter than that of 2 other myodocopids belonging to different families and kept at 12.degree. C or less. Tables and figures showing ontogenic changes that can be used to identify each instar and a preliminary key to the instars of the Cypridinidae are presented. Most useful characters are the number of bristles on the following limbs: the 4th segment of the 1st antenna, the ventral side of the 2nd segment of the endopodite of the mandible, and the 6th limb; and the number and shape of bristles on the 7th limb. The first 3 instars have a posterior process on the body. Females of the 5th instar and adults are larger than males. Carapace sizes of 5th instar males and adult males from different clutches of the same mother ostracod overlap.