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Article: Thermal effects on embryonic development and hatching for blue king crab Paralithodes platypus (Brandt, 1850) held in the laboratory, and a method for predicting dates of hatching.(Abstract)
- Article from:
- Journal of Shellfish Research
- Article date:
- December 1, 2008
- Author:
CopyrightCOPYRIGHT 2008 National Shellfisheries Association, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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ABSTRACT Climate change may affect crab populations via thermal effects on embryo development and hatching. To test this, we measured the duration of development and hatching for the embryos of 11 blue king crabs Paralithodes platypus held at 2.3 [+ or -] 0.45, 4.3 [+ or -] 0.31, and 6.1 [+ or -] 0.61[degrees]C. Embryo area, length, and width, eye length and width, and percent yolk were measured biweekly from digital images, and hatching larvae were collected daily from individual crabs. Data were compared between eggs of identical age (weeks since fertilization). Temperature did not have a significant effect on embryo measurements, but did affect development indices ...