Comparative Characteristics of Percentage Edibility, Condition Index, Biochemical Constituents and Lipids Nutritional Quality Indices of Wild and Farmed Scallops (Flexopecten glaber)
, Asia Grattagliano 2, Giovanni Fanelli 1 and Ermelinda Prato 1,*
Guangtao Zhang
Round 1
Reviewer 1 Report
This manuscript reports marketability indices (Percentage Edibility and Condition Index), biochemical composition (proximate and fatty acid composition) and lipids nutritional quality indices of wild and cultured scallops (Flexopecten glaber).
Many paragraphs in the introduction and results and discussions have only 1 sentence. Is it an editing problem? This problem may be considered as a sign of unfinished manuscript.
How were the cultured scallops cultivated needs more description. Were they from commercial farms or cultivated for this study? Is there a scallop cultivation industry?
Few descriptions were about why did wild and farmed scallops differ in fatty acids and indices. Did feed or other factors affect these indices or fatty acids? What was the compositions of the feed? What were the environmental conditions of scallop farms and wild scallops?
Specific comments:
Line 47: citation [4] is out of place or mis-numbered.
Line 79: … these information’s ? …
Line 84: The place name is not useful for international readers not from this region.
Line 94: Condition index (CI)
Line 132: … values ± 1 S. D. …
Line 156: many physiological …
Line 208: … dietary guidelines …
Line 298: … product showed …
Line 318: … G. Shellfish …
Line 320: remove “)”
Line 361: add “.”
Author Response
Point 1- Many paragraphs in the introduction and results and discussion have only 1 sentence. Is it an editing problem? This problem may be considered as a sign of unfinished manuscript
Author's Replay: The ms have been improved
Point 2-How were the cultured scallops cultivated needs more description. Were they from commercial farms or cultivated for this study? Is there a scallop cultivation industry?
Author’s Reply- A more accurate description of suspended cages utilized have been reported in the text. since does not exist in Mediterranean a commercial scallops farm, the scallops have been cultivated in a experimental plant. This aspect has been reported in introduction.
Point 3-Few descriptions were about why did wild and farmed scallops differ in fatty acids and indices. Did feed or other factors affect these indices or fatty acids? What was the compositions of the feed? What were the environmental conditions of scallop farms and wild scallops?
Author’s Reply: In the text we have added the implication determined by food supply on FAs composition. The environmental conditions of study area have been reported in Material and Methods section.
Specific comments:
Line 47: citation [4] is out of place or mis-numbered.
Author’s Reply: we have moved the citation in the right place
Line 79: … these information’s ? …
Author’s Reply: This sentence has been better explain
Line 84: The place name is not useful for international readers not from this region.
Author’s Reply: We have delete the place name
Line 94: Condition index (CI)
Author’s Reply: Done
Line 132: … values ± 1 S. D. …
Author’s Reply: Done
Line 156: many physiological …
Author’s Reply: Done
Line 208: … dietary guidelines …
Author’s Reply: Done
Line 298: … product showed …
Author’s Reply: Done
Line 318: … G. Shellfish …
Author’s Reply: Done
Line 320: remove “)”
Author’s Reply: Done
Line 361: add “.”
Author’s Reply: Done
Author Response File: 
Author Response.docx
Reviewer 2 Report
Review of: Comparative characteristics of percentage edibility, conditional index, biochemical constituents and lipids nutritional quality indices of wild and farmed scallops (Flexopecten glaber)
The manuscript compare wild and farmed scallop and deals with the marketability indices and biochemical characteristics.
Abstract
The abstract is OK. It sets the aim of the manuscript, and the main results are presented.
Introduction
The introduction is OK.
Line 69: I am not familiar with the expression animal quality. Flesh quality might be a better word.
Line 74: “data that report the comparison of the nutritional …”
Material and methods
Line 86: “All samples were cleaned (not cleaning?) for fouling organism….”
Line 87: What is an icebox?
Line 90: Samples x2
Line 90. Unclear if the samples were pressed with or without the shell. And how is the shell removed?
Line 94:Explain the abbreviation CI.
Results and discussion
Line 137: I miss some comments in the discussion about the edibility percentage of 45%. Is it high or low compared with scallops in general?
Line 149-150: Rewrite. I have problem to understand what you mean.
Line 158: moisture is > 83% not only up to 80%
Line 168: Wrong protein values
Line 171 and further: I am not familiar very familiar with eating scallops. The fat content in these scallop are between 1.4 and 1.7 g per 100 g, which is quite low compared to for example fatty fish, which is often preferred as a good source for marine lipids. But the content of n-3 PUFA is approximately 20-23% of the total fat, which means that is we eat 100 grams of muscle from these scallops, we will receive 0.4 grams of PUFA. Which is quite high, and cover nearly 30-40% of the daily need for the long marine fatty acids (which is set to approximately 1 g per day to give health effect). Would it be an idea to say something in general about the need for n-3 PUFAs in the daily diet, and how much scallop one should eat to cover the daily need for n-3 PUFAs.
Conclusion is OK
Author Response
Response to Reviewer 2 Comments
Thank you very much for your time and for appreciating our work.
Specific Comments
Abstract
The abstract is OK. It sets the aim of the manuscript, and the main results are presented.
Introduction
The introduction is OK.
Line 69: I am not familiar with the expression animal quality. Flesh quality might be a better word.
Author’s Reply: We have changed the word.
Line 74: “data that report the comparison of the nutritional ...”
Author’s Reply: Done
Material and methods
Line 86: “All samples were cleaned (not cleaning?) for fouling organism....”
Author’s Reply: Done
Line 87: What is an icebox?
Author’s Reply: We have specified better
Line 90: Samples x2
Author’s Reply: Done
Line 90. Unclear if the samples were pressed with or without the shell. And how is the shell removed?
Author’s Reply: We have specified better
Line 94:Explain the abbreviation CI.
Author’s Reply: Done
Results and discussion
Line 137: I miss some comments in the discussion about the edibility percentage of 45%. Is it high or low compared with scallops in general?
Author’s Reply: The results is in line with other bivalves in the same period
Line 149-150: Rewrite. I have problem to understand what you mean.
Author’s Reply: We have rewrite the sentence
Line 158: moisture is > 83% not only up to 80%
Author’s Reply: Done
Line 168: Wrong protein values
Author’s Reply: The right values have been added
Line 171 and further: I am not familiar very familiar with eating scallops. The fat content in these scallop are between 1.4 and 1.7 g per 100 g, which is quite low compared to for example fatty fish, which is often preferred as a good source for marine lipids. But the content of n-3 PUFA is approximately 20-23% of the total fat, which means that is we eat 100 grams of muscle from these scallops, we will receive 0.4 grams of PUFA. Which is quite high, and cover nearly 30-40% of the daily need for the long marine fatty acids (which is set to approximately 1 g per day to give health effect). Would it be an idea to say something in general about the need for n-3 PUFAs in the daily diet, and how much scallop one should eat to cover the daily need for n-3 PUFAs.
Author’s Reply: We have added the recommended daily portion (RPD) to have a health effect.
Conclusion is OK
Reviewer 3 Report
This MS compared nutritional quality of wild and cultured scallops, and developed a series of indices. The results are interesting and encouraging. I have two comments:
First, page 2 line 43, “…fulfil the gap between supply and demand…”. Aquaculture can definitely increase seafood supply. However, the maximum production is determined by marine primary production level. It is still uncertain whether it can meet the future demand, for example, that proposed in FAO reports.
Second, in conclusion, “scallop F. glaber farmed” (in suspended cages) should be defined as “suspended farmed scallop”. Lipid and fatty acid contents in bivalves may be determined by their food supply, as demonstrated in ref 49 in this MS. Scallops in suspended cages feed on planktonic items, whereas wild individuals may also utilize foods in benthic layer. In other words, the observed difference in this study may present also between scallops farmed in suspended cages and bottom seeding mariculture.
Author Response
Point 1-First, page 2 line 43, “…fulfil the gap between supply and demand…”. Aquaculture can definitely increase seafood supply. However, the maximum production is determined by marine primary production level. It is still uncertain whether it can meet the future demand, for example, that proposed in FAO reports.
Response 1: It is true, I am agree with the referee, but if the Aquaculture will grow to meet the increasing demand for seafood some management effort in order to ensure sustainability are required. There is a need to planning and management, at local, national and international, in order to ensure sustainability, throughout site selection, carrying capacity assessment, aquaculture hazard and risk analysis. These ecosystem‐based approach are need to aquaculture governance and planning.
Point 2- Second, in conclusion, “scallop F. glaber farmed” (in suspended cages) should be defined as “suspended farmed scallop”. Lipid and fatty acid contents in bivalves may be determined by their food supply, as demonstrated in ref 49 in this MS. Scallops in suspended cages feed on planktonic items, whereas wild individuals may also utilize foods in benthic layer. In other words, the observed difference in this study may present also between scallops farmed in suspended cages and bottom seeding mariculture.
Response 2: In the text we have added the implication determined by food supply on FAs composition. In general, in this study, there were little differences between wild and farmed scallops. Very interessing may be (in the next future) a comparative study on farmed scallops: in suspended cages and in bottom seeding mariculture.
This manuscript is a resubmission of an earlier submission. The following is a list of the peer review reports and author responses from that submission.
