. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Reference: Biol. Bull., 144: 556-566. (June, 1973) LARVA RELEASE IN RESPONSE TO LIGHT BY THE COMPOUND ASCIDIANS DISTAPLIA OCCIDENTALS AND METANDROCARPA TAYLOR! HIROSHI WATANABE' AND CHARLES C. LAMBERT 2 Friday Harbor Laboratories. I'niversity of Washington, Seattle, Washington and Zoological Institute, Tokyo Kyoikn University, Tokyo, Japan Light has been implicated as a trigger to gamete release by several solitary asciclians (see Lambert and Brandt, 1967, for review). Most solitary ascidians are oviparous with large numbers
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Reference: Biol. Bull., 144: 556-566. (June, 1973) LARVA RELEASE IN RESPONSE TO LIGHT BY THE COMPOUND ASCIDIANS DISTAPLIA OCCIDENTALS AND METANDROCARPA TAYLOR! HIROSHI WATANABE' AND CHARLES C. LAMBERT 2 Friday Harbor Laboratories. I'niversity of Washington, Seattle, Washington and Zoological Institute, Tokyo Kyoikn University, Tokyo, Japan Light has been implicated as a trigger to gamete release by several solitary asciclians (see Lambert and Brandt, 1967, for review). Most solitary ascidians are oviparous with large numbers of relatively small eggs which develop rapidly into a simplified tadpole larva which swims for a short time before selecting a suitable substrate and metamorphosing (Berrill, 1950). Compound ascidians, on the other hand, generally produce only a few large eggs which develop ovovivipa- rously into a highly differentiated tadpole larva that is only released when develop- ment of the swimming larva is complete. Many observations of larva release by compound ascidians have been reported, which include members of both orders in which brooding is common (Abbott, 1955; Costello, Davidson, Eggers, Fox and Henley, 1957; Grave, 1936, 137 : Grave- and \Yoodridge, 1924; Oka, 1943; Scott, 1954). Aplidium (-- Aniaroncinin ) constcllafinn (Scott, 1954; Costello, David- son, Eggers, Fox and Henley, 1957), Pcrophora 1'iridis (Costello ct a!., 1957), Polyandrocarpa tincta (Grave, 1936) and Botryllns schlosseri (Grave and Wood- bridge, 1924; Grave, 1937) seem to release tadpoles during the morning when ASCIDIAN COLONY t/r. FUNNEL REGULATOR. FIGURE 1. Diagram of the tunicate tadpole collector. The water level is maintained by the heights of the regulator and second outflow u tube. The larvae are collected on 370/u Nytex mesh in the trap. 1 Present Address: Zoological Institute, Faculty of Science, Tokyo Kyoiku University, Otsuka 3-29-1, Bunkyo-ku, Tokyo, Japan. 2 Present Address: Department of Bi
Size: 2083px × 1199px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
