Dulčić Jakov, Baždarić Branimir, Grubišić Leon, Tutman Pero, Dragičević Branko
Institute of Oceanography and Fisheries, Split, Croatia.
Integr Zool. 2009 Sep;4(3):272-6. doi: 10.1111/j.1749-4877.2009.00161.x.
Although information about embryonic and larval development of garpike, Belone belone (Linnaeus, 1761), is present in the published literature, the bulk of research concerns garpike from the northeastern Atlantic Ocean and the Baltic Sea. The present work describes the embryonic and larval development of garpike, Belone belone, from the Adriatic Sea, and methods used for incubation of fertilized eggs in aquarium conditions. Because garpike is, as suggested by some authors, divided into subspecies, we conclude that some differences in embryonic development could also be expected. In the present study, eggs were fertilized using the dry fertilization method and were incubated in a tank equipped with aeration and constant sea water flow. Salinity and content of dissolved oxygen were constant, and the temperature varied between 19.4 and 22.3°C. Eggs were spherical, measuring 3071.9 ± 75.73 μm in diameter. Yolk sacs were homogeneous and did not contain oil globules. The first larvae hatched 329 h and 47 min after fertilization. Absorption of the yolk sac occurred 17 h - 48 h after hatching and the total length of newly hatched larvae was 9.78 mm. The peculiarities observed in the embryonic and early larval development are evidence of an exceptional plasticity and adaptive potential, which could be considered as helpful features in extending the natural range of occurrence of this species.
虽然关于长颌鱼（Belone belone，林奈，1761年）胚胎和幼体发育的信息已发表在文献中，但大部分研究关注的是来自东北大西洋和波罗的海的长颌鱼。本研究描述了来自亚得里亚海的长颌鱼的胚胎和幼体发育，以及在水族箱条件下孵化受精卵的方法。由于一些作者认为长颌鱼可分为亚种，我们推断胚胎发育中也可能存在一些差异。在本研究中，采用干法授精使卵受精，并在配备曝气和恒定海水流动的水箱中进行孵化。盐度和溶解氧含量恒定，温度在19.4至22.3°C之间变化。卵呈球形，直径为3071.9±75.73μm。卵黄囊均匀，不含油球。第一批幼体在受精后329小时47分钟孵化。卵黄囊在孵化后17至48小时被吸收，刚孵化的幼体全长为9.78毫米。在胚胎和早期幼体发育中观察到的特性证明了其具有非凡的可塑性和适应潜力，这可被视为有助于该物种扩大自然分布范围的特征。
