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| Estimation of Dynamic Energy Budget (DEB) Model Parameters for Mud Cockle Tegillarca granosa |
| JIANG Bo1,2, HE Jing3, ZHENG Xiafei3, HE Lin2, LIN Zhihua2,3 |
1. National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai 201306, China;
2. Zhejiang Key Laboratory of Aquatic Germplasm Resources, College of Biological Environmental Sciences, Zhejiang Wanli University, Ningbo 315100, China;
3. Ninghai Institute of Maricultural Breeding and Seed Industry, Zhejiang Wanli University, Ningbo 315604, China |
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Abstract In this paper, six key parameters for the dynamic energy budget (DEB) model were obtained in mud cockle Tegillarca granosa with shell length of 1.848—3.902 cm and soft part of 0.755—1.466 g in a laboratory, including shape coefficient (δm) estimated by a method of line regression of shell length and soft tissue wet weight of mud cockle, and Arrhenius temperature (TA) estimated by a method of measuring the dry weight oxygen consumption rate of mud cockle at watert temperature of 10 ℃, 15 ℃, 20 ℃, 25 ℃, 30 ℃, and 35 ℃. The another key parameters, such as volume-specific costs for growth ([EG]), volume-specific maintenance costs per unit of time ([P·M]), maximum storage density ([EM]) and reserve energy μE were estimated by measuring the oxygen consumption rate and changes in dry tissue weight of mud cockle. The results showed that the cubic functional relations between shell length (L) and soft part wet weight (mM) was expressed as mM=0.0556L3.1831 (r2=0.9256), with linear regression between cube root of the shell length and the wet weight of the soft body, the slope as the shape coefficient (δm=0.405) and with TA of (4830±586) K. The starvation test for 35 days revealed that dry flesh weight of mud cockle was maintained at 0.3 g, and soft organic matter was decreased from 87.3％ to 77.7％, with [EG] of 5475 J/cm3 and [EM] of 2026 J/cm3. After 49 days, dry flesh weight was found to be decreased by 41.2％ and oxygen consumption rate to be decreased by 75.2％. Meanwhile, the oxygen consumption rate was de- creased from 0.89 mg/(g·h) to 0.22 mg/(g·h), and [P·M] was estimated to be 32.2 J/(cm3·d). The reserve energy was described as the ratio of the maximum energy storage per unit volume to the difference between the initial dry weight and the final dry weight, and was 23 376 J/g. The finding provides data support for the construction of a dynamic energy budget model for mud cockle, and lays a foundation for further use of dynamic energy budget model to guide shellfish production, fishery management and aquaculture capacity assessment.
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Received: 20 May 2021
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